Update README

Not having this has caused me much annoyance over the years.

.clang-format

@@ -0,0 +1,32 @@
+# clang-format is fairly limited, and these rules are approximate:
+#  - array initializers can get terribly mangled with clang-format 12.0,
+#  - sometimes it still aligns with space characters,
+#  - struct name NL { NL ... NL } NL name; is unachievable.
+BasedOnStyle: GNU
+ColumnLimit: 80
+IndentWidth: 4
+TabWidth: 4
+UseTab: ForContinuationAndIndentation
+BreakBeforeBraces: Allman
+SpaceAfterCStyleCast: true
+AlignAfterOpenBracket: DontAlign
+AlignOperands: DontAlign
+AlignConsecutiveMacros: Consecutive
+AllowAllArgumentsOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+IndentGotoLabels: false
+
+# IncludeCategories has some potential, but it may also break the build.
+# Note that the documentation says the value should be "Never".
+SortIncludes: false
+
+# This is a compromise, it generally works out aesthetically better.
+BinPackArguments: false
+
+# Unfortunately, this can't be told to align to column 40 or so.
+SpacesBeforeTrailingComments: 2
+
+# liberty-specific macro body wrappers.
+MacroBlockBegin: "BLOCK_START"
+MacroBlockEnd: "BLOCK_END"
+ForEachMacros: ["LIST_FOR_EACH"]

.gitignore

@@ -7,3 +7,5 @@
 /uirc3.files
 /uirc3.creator*
 /uirc3.includes
+/uirc3.cflags
+/uirc3.cxxflags

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "liberty"]
 	path = liberty
-	url = git://github.com/pjanouch/liberty.git
+	url = https://git.janouch.name/p/liberty.git

.travis.yml

@@ -1,44 +0,0 @@
-sudo: required
-dist: trusty
-language: c
-notifications:
- irc:
-  channels: "irc.janouch.name#dev"
-  use_notice: true
-  skip_join: true
-env:
- global:
-  - secure: "ck6keK5tTbVCN7VGyKglS890hjovUNt2zyOydiyFtQDciaB/rvEwkKy4anMCEdZHFpGAPE9iBmNYaGUsD1Y+KifhhImVMbuThe2D8MLv5crSLRheYPbbmhO8MWPAxmQnuQhpwsUKZlHvUfX8nh+d0juNdqXklvhVml78Gi99QFw="
- matrix:
-  - readline=ON libedit=OFF
-  - readline=OFF libedit=ON
-addons:
- coverity_scan:
-  project:
-   name: "pjanouch/uirc3"
-   description: "Experimental IRC client, daemon and bot"
-  notification_email: p.janouch@gmail.com
-  build_command_prepend: "cmake .. -DCMAKE_BUILD_TYPE=Release"
-  build_command: "make"
-  branch_pattern: coverity_scan
-compiler:
- - clang
- - gcc
-before_install:
- # We need this PPA for a recent version of libedit
- - sudo add-apt-repository ppa:ondrej/php5-5.6 -y
- # We need this PPA for Lua 5.3
- - sudo add-apt-repository ppa:vbernat/haproxy-1.6 -y
- - sudo apt-get update -qq
-install:
- - sudo apt-get install -y libncursesw5-dev libreadline-dev libedit-dev
-   liblua5.3-dev libffi-dev help2man expect
-before_script:
- - mkdir build
- - cd build
-script:
- - cmake .. -DCMAKE_INSTALL_PREFIX=/usr
-   -DWANT_READLINE=$readline -DWANT_LIBEDIT=$libedit
- - make all test
- - cpack -G DEB
- - ../test

CMakeLists.txt

@@ -1,22 +1,28 @@
-project (uirc3 C)
+# Ubuntu 18.04 LTS and OpenBSD 6.4
-cmake_minimum_required (VERSION 2.8.11)
+cmake_minimum_required (VERSION 3.10)
+project (uirc3 VERSION 1.4.0 LANGUAGES C)
 
 # Options
 option (WANT_READLINE "Use GNU Readline for the UI (better)" ON)
 option (WANT_LIBEDIT "Use BSD libedit for the UI" OFF)
 
 # Moar warnings
-if ("${CMAKE_C_COMPILER_ID}" MATCHES "GNU" OR CMAKE_COMPILER_IS_GNUC)
+set (CMAKE_C_STANDARD 99)
+set (CMAKE_C_STANDARD_REQUIRED ON)
+set (CMAKE_C_EXTENSIONS OFF)
+
+if ("${CMAKE_C_COMPILER_ID}" MATCHES "GNU" OR CMAKE_COMPILER_IS_GNUCC)
 	# -Wunused-function is pretty annoying here, as everything is static
-	set (CMAKE_C_FLAGS
+	set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wno-unused-function")
-		"${CMAKE_C_FLAGS} -std=c99 -Wall -Wextra -Wno-unused-function")
+endif ()
-endif ("${CMAKE_C_COMPILER_ID}" MATCHES "GNU" OR CMAKE_COMPILER_IS_GNUC)
 
 # Version
-set (project_version "0.9.3")
+set (project_version "${PROJECT_VERSION}")
 
 # Try to append commit ID if it follows a version tag.  It might be nicer if
 # we could also detect dirty worktrees but that's very hard to get right.
+# If we didn't need this for CPack, we could use add_custom_command to generate
+# a version source/include file.
 find_package (Git)
 set (git_head "${PROJECT_SOURCE_DIR}/.git/HEAD")
 if (GIT_FOUND AND EXISTS "${git_head}")
@@ -26,8 +32,8 @@ if (GIT_FOUND AND EXISTS "${git_head}")
 		set (git_ref "${PROJECT_SOURCE_DIR}/.git/${CMAKE_MATCH_1}")
 		if (EXISTS "${git_ref}")
 			configure_file ("${git_ref}" git-ref.tag COPYONLY)
-		endif (EXISTS "${git_ref}")
+		endif ()
-	endif (git_head_content MATCHES "^ref: ([^\r\n]+)")
+	endif ()
 
 	execute_process (COMMAND ${GIT_EXECUTABLE} describe --tags --match v*
 		WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
@@ -35,8 +41,8 @@ if (GIT_FOUND AND EXISTS "${git_head}")
 		OUTPUT_VARIABLE git_describe OUTPUT_STRIP_TRAILING_WHITESPACE)
 	if (NOT git_describe_result)
 		string (REGEX REPLACE "^v" "" project_version "${git_describe}")
-	endif (NOT git_describe_result)
+	endif ()
-endif (GIT_FOUND AND EXISTS "${git_head}")
+endif ()
 
 # Dashes make filenames confusing and upset packaging software
 string (REPLACE "-" "+" project_version_safe "${project_version}")
@@ -52,21 +58,20 @@ include_directories (${libssl_INCLUDE_DIRS})
 link_directories (${libssl_LIBRARY_DIRS})
 
 if ("${CMAKE_SYSTEM_NAME}" MATCHES "BSD")
-	include_directories (/usr/local/include)
-	link_directories (/usr/local/lib)
 	# Need this for SIGWINCH in FreeBSD and OpenBSD respectively;
 	# our POSIX version macros make it undefined
 	add_definitions (-D__BSD_VISIBLE=1 -D_BSD_SOURCE=1)
-endif ("${CMAKE_SYSTEM_NAME}" MATCHES "BSD")
+endif ()
 
 # -lrt is only for glibc < 2.17
 # -liconv may or may not be a part of libc
-foreach (extra iconv rt)
+# -lm may or may not be a part of libc
+foreach (extra iconv rt m)
 	find_library (extra_lib_${extra} ${extra})
 	if (extra_lib_${extra})
 		list (APPEND project_libraries ${extra_lib_${extra}})
-	endif (extra_lib_${extra})
+	endif ()
-endforeach (extra)
+endforeach ()
 
 include (CheckCSourceRuns)
 set (CMAKE_REQUIRED_LIBRARIES ${project_libraries})
@@ -76,53 +81,53 @@ CHECK_C_SOURCE_RUNS ("#include <iconv.h>
 	int main () { return iconv_open (\"UTF-8//TRANSLIT\", \"ISO-8859-1\")
 		== (iconv_t) -1; }" ICONV_ACCEPTS_TRANSLIT)
 
-# Dependencies for degesch
+# Dependencies for xC
 pkg_check_modules (libffi REQUIRED libffi)
-list (APPEND degesch_libraries ${libffi_LIBRARIES})
+list (APPEND xC_libraries ${libffi_LIBRARIES})
 include_directories (${libffi_INCLUDE_DIRS})
 link_directories (${libffi_LIBRARY_DIRS})
 
-# FIXME: other Lua versions may be acceptable, don't know yet
+# XXX: other Lua versions may be acceptable, don't know yet
-pkg_search_module (lua lua53 lua5.3 lua-5.3 lua>=5.3)
+pkg_search_module (lua lua53 lua5.3 lua-5.3 lua54 lua5.4 lua-5.4 lua>=5.3)
-option (WITH_LUA "Enable experimental support for Lua plugins" ${lua_FOUND})
+option (WITH_LUA "Enable support for Lua plugins" ${lua_FOUND})
 
 if (WITH_LUA)
 	if (NOT lua_FOUND)
 		message (FATAL_ERROR "Lua library not found")
-	endif (NOT lua_FOUND)
+	endif ()
 
-	list (APPEND degesch_libraries ${lua_LIBRARIES})
+	list (APPEND xC_libraries ${lua_LIBRARIES})
 	include_directories (${lua_INCLUDE_DIRS})
 	link_directories (${lua_LIBRARY_DIRS})
-endif (WITH_LUA)
+endif ()
 
 find_package (Curses)
 pkg_check_modules (ncursesw ncursesw)
 if (ncursesw_FOUND)
-	list (APPEND degesch_libraries ${ncursesw_LIBRARIES})
+	list (APPEND xC_libraries ${ncursesw_LIBRARIES})
 	include_directories (${ncursesw_INCLUDE_DIRS})
 elseif (CURSES_FOUND)
-	list (APPEND degesch_libraries ${CURSES_LIBRARY})
+	list (APPEND xC_libraries ${CURSES_LIBRARY})
 	include_directories (${CURSES_INCLUDE_DIR})
-else (CURSES_FOUND)
+else ()
 	message (SEND_ERROR "Curses not found")
-endif (ncursesw_FOUND)
+endif ()
 
 if ((WANT_READLINE AND WANT_LIBEDIT) OR (NOT WANT_READLINE AND NOT WANT_LIBEDIT))
 	message (SEND_ERROR "You have to choose either GNU Readline or libedit")
 elseif (WANT_READLINE)
 	# OpenBSD's default readline is too old
 	if ("${CMAKE_SYSTEM_NAME}" MATCHES "OpenBSD")
-		include_directories (/usr/local/include/ereadline)
+		include_directories (${OPENBSD_LOCALBASE}/include/ereadline)
-		list (APPEND degesch_libraries ereadline)
+		list (APPEND xC_libraries ereadline)
-	else ("${CMAKE_SYSTEM_NAME}" MATCHES "OpenBSD")
+	else ()
-		list (APPEND degesch_libraries readline)
+		list (APPEND xC_libraries readline)
-	endif ("${CMAKE_SYSTEM_NAME}" MATCHES "OpenBSD")
+	endif ()
 elseif (WANT_LIBEDIT)
 	pkg_check_modules (libedit REQUIRED libedit)
-	list (APPEND degesch_libraries ${libedit_LIBRARIES})
+	list (APPEND xC_libraries ${libedit_LIBRARIES})
 	include_directories (${libedit_INCLUDE_DIRS})
-endif ((WANT_READLINE AND WANT_LIBEDIT) OR (NOT WANT_READLINE AND NOT WANT_LIBEDIT))
+endif ()
 
 # Generate a configuration file
 set (HAVE_READLINE "${WANT_READLINE}")
@@ -130,57 +135,41 @@ set (HAVE_EDITLINE "${WANT_LIBEDIT}")
 set (HAVE_LUA      "${WITH_LUA}")
 
 include (GNUInstallDirs)
-# ZyklonB is currently an odd duck but degesch follows normal XDG rules
-set (zyklonb_plugin_dir ${CMAKE_INSTALL_LIBDIR}/zyklonb/plugins)
 configure_file (${PROJECT_SOURCE_DIR}/config.h.in ${PROJECT_BINARY_DIR}/config.h)
 include_directories (${PROJECT_SOURCE_DIR} ${PROJECT_BINARY_DIR})
 
-# Project source files
+# Generate IRC replies--we need a custom target because of the multiple outputs
-set (common_sources)
+add_custom_command (OUTPUT xD-replies.c xD.msg
-set (common_headers ${PROJECT_BINARY_DIR}/config.h)
+	COMMAND ${PROJECT_SOURCE_DIR}/xD-gen-replies.sh
-
+		> xD-replies.c < ${PROJECT_SOURCE_DIR}/xD-replies
-add_custom_command (OUTPUT kike-replies.c kike.msg
+	DEPENDS ${PROJECT_SOURCE_DIR}/xD-replies
-	COMMAND ${PROJECT_SOURCE_DIR}/kike-gen-replies.sh
-		> kike-replies.c < ${PROJECT_SOURCE_DIR}/kike-replies
-	DEPENDS ${PROJECT_SOURCE_DIR}/kike-replies
 	COMMENT "Generating files from the list of server numerics")
-set_source_files_properties (${PROJECT_BINARY_DIR}/kike-replies.c
+add_custom_target (replies DEPENDS ${PROJECT_BINARY_DIR}/xD-replies.c)
-	PROPERTIES HEADER_FILE_ONLY TRUE)
 
 # Build
-add_executable (zyklonb zyklonb.c ${common_sources} ${common_headers})
+foreach (name xB xC xD)
-target_link_libraries (zyklonb ${project_libraries})
+	add_executable (${name} ${name}.c ${PROJECT_BINARY_DIR}/config.h)
-add_threads (zyklonb)
+	target_link_libraries (${name} ${project_libraries})
+	add_threads (${name})
+endforeach ()
 
-add_executable (degesch degesch.c kike-replies.c
+add_dependencies (xD replies)
-	${common_sources} ${common_headers})
+add_dependencies (xC replies)
-target_link_libraries (degesch ${project_libraries} ${degesch_libraries})
+target_link_libraries (xC ${xC_libraries})
-add_threads (degesch)
-
-add_executable (kike kike.c kike-replies.c ${common_sources} ${common_headers})
-target_link_libraries (kike ${project_libraries})
-add_threads (kike)
 
 # Tests
-function (make_tests_for target_name)
-	get_target_property (sources   ${target_name} SOURCES)
-	get_target_property (libraries ${target_name} LINK_LIBRARIES)
-	get_target_property (options   ${target_name} COMPILE_OPTIONS)
-
-	set (test test-${target_name})
-	add_executable (${test} ${sources})
-	target_link_libraries (${test} ${libraries})
-	set_target_properties (${test} PROPERTIES
-		COMPILE_DEFINITIONS TESTING
-		COMPILE_OPTIONS "${options}")
-
-	add_test (NAME ${test} COMMAND ${test})
-endfunction (make_tests_for)
-
 include (CTest)
 if (BUILD_TESTING)
-	make_tests_for (degesch)
+	add_executable (test-xC $<TARGET_PROPERTY:xC,SOURCES>)
-endif (BUILD_TESTING)
+	set_target_properties (test-xC PROPERTIES COMPILE_DEFINITIONS TESTING)
+	target_link_libraries (test-xC $<TARGET_PROPERTY:xC,LINK_LIBRARIES>)
+	add_threads (test-xC)
+	add_dependencies (test-xC replies)
+
+	add_test (NAME test-xC COMMAND test-xC)
+	add_test (NAME custom-static-analysis
+		COMMAND ${PROJECT_SOURCE_DIR}/test-static)
+endif ()
 
 # Various clang-based diagnostics, loads of fake positives and spam
 file (GLOB clang_tidy_sources *.c)
@@ -197,28 +186,31 @@ add_custom_target (clang-tidy
 	WORKING_DIRECTORY ${PROJECT_SOURCE_DIR})
 
 # Installation
-install (TARGETS zyklonb degesch kike DESTINATION ${CMAKE_INSTALL_BINDIR})
+install (TARGETS xB xC xD DESTINATION ${CMAKE_INSTALL_BINDIR})
 install (FILES LICENSE DESTINATION ${CMAKE_INSTALL_DOCDIR})
-install (DIRECTORY plugins/zyklonb/
+# XXX: our defaults for XDG_DATA_DIRS expect /usr/local/shore or /usr/share
-	DESTINATION ${zyklonb_plugin_dir} USE_SOURCE_PERMISSIONS)
+install (DIRECTORY plugins/xB/
-install (DIRECTORY plugins/degesch/
+	DESTINATION ${CMAKE_INSTALL_DATADIR}/xB/plugins USE_SOURCE_PERMISSIONS)
-	DESTINATION ${CMAKE_INSTALL_DATADIR}/degesch/plugins)
+install (DIRECTORY plugins/xC/
+	DESTINATION ${CMAKE_INSTALL_DATADIR}/xC/plugins)
 
-# Generate documentation from program help
+# Generate documentation from text markup
-find_program (HELP2MAN_EXECUTABLE help2man)
+find_program (ASCIIDOCTOR_EXECUTABLE asciidoctor)
-if (NOT HELP2MAN_EXECUTABLE)
+if (NOT ASCIIDOCTOR_EXECUTABLE)
-	message (FATAL_ERROR "help2man not found")
+	message (FATAL_ERROR "asciidoctor not found")
-endif (NOT HELP2MAN_EXECUTABLE)
+endif ()
 
-foreach (page zyklonb degesch kike)
+foreach (page xB xC xD)
 	set (page_output "${PROJECT_BINARY_DIR}/${page}.1")
 	list (APPEND project_MAN_PAGES "${page_output}")
 	add_custom_command (OUTPUT ${page_output}
-		COMMAND ${HELP2MAN_EXECUTABLE} -N
+		COMMAND ${ASCIIDOCTOR_EXECUTABLE} -b manpage
-			"${PROJECT_BINARY_DIR}/${page}" -o ${page_output}
+			-a release-version=${project_version}
-		DEPENDS ${page}
+			"${PROJECT_SOURCE_DIR}/${page}.adoc"
+			-o "${page_output}"
+		DEPENDS ${page}.adoc
 		COMMENT "Generating man page for ${page}" VERBATIM)
-endforeach (page)
+endforeach ()
 
 add_custom_target (docs ALL DEPENDS ${project_MAN_PAGES})
 
@@ -226,13 +218,13 @@ foreach (page ${project_MAN_PAGES})
 	string (REGEX MATCH "\\.([0-9])$" manpage_suffix "${page}")
 	install (FILES "${page}"
 		DESTINATION "${CMAKE_INSTALL_MANDIR}/man${CMAKE_MATCH_1}")
-endforeach (page)
+endforeach ()
 
 # CPack
-set (CPACK_PACKAGE_DESCRIPTION_SUMMARY "Experimental IRC client, daemon and bot")
+set (CPACK_PACKAGE_DESCRIPTION_SUMMARY "Unreasonable IRC client, daemon and bot")
 set (CPACK_PACKAGE_VERSION "${project_version_safe}")
-set (CPACK_PACKAGE_VENDOR "Premysl Janouch")
+set (CPACK_PACKAGE_VENDOR "Premysl Eric Janouch")
-set (CPACK_PACKAGE_CONTACT "Přemysl Janouch <p.janouch@gmail.com>")
+set (CPACK_PACKAGE_CONTACT "Přemysl Eric Janouch <p@janouch.name>")
 set (CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
 
 set (CPACK_GENERATOR "TGZ;ZIP")

LICENSE

@@ -1,8 +1,7 @@
-Copyright (c) 2014 - 2015, Přemysl Janouch <p.janouch@gmail.com>
+Copyright (c) 2014 - 2021, Přemysl Eric Janouch <p@janouch.name>
 
 Permission to use, copy, modify, and/or distribute this software for any
-purpose with or without fee is hereby granted, provided that the above
+purpose with or without fee is hereby granted.
-copyright notice and this permission notice appear in all copies.
 
 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

NEWS

@@ -1,37 +1,236 @@
+1.5.0 (20xx-xx-xx) "The Show Must Go On"
+
+ * xC: made it possible to pass the cursor position to external editors,
+   in particular VIM and Emacs
+
+ * xC: started quoting text coming from bracketed pastes,
+   to minimize the risk of trying to execute filesystem paths as commands
+
+ * xC: fixed to work with post-2021-08-29 editline
+
+ * xC: extended editline's autocomplete to show all the options
+
+
+1.4.0 (2021-10-06) "Call Me Scruffy Scruffington"
+
+ * xC: made message autosplitting respect text formatting
+
+ * xC: fixed displaying IRC colours above 16
+
+ * xC: offer IRCnet as an IRC network to connect to,
+   rather than the lunatic new Freenode
+
+ * xD: started bumping the soft limit on file descriptors to the hard one
+
+
+1.3.0 (2021-08-07) "New World Order"
+
+ * xC: made nick autocompletion offer recent speakers first
+
+ * All binaries have been renamed to something even sillier,
+   and all references in the source tree have been redacted;
+   this represents a major incompatible change for all plugins;
+   configuration and program data have to be adjusted manually
+
+
+1.2.0 (2021-07-08) "There Are Other Countries As Well"
+
+ * xC: added a /squery command for IRCnet
+
+ * xC: added trivial support for SASL EXTERNAL, enabled by adding "sasl"
+   to the respective server's "capabilities" list
+
+ * xC: now supporting IRCv3.2 capability negotiation, including CAP DEL
+
+ * xC: added support for IRCv3 chghost
+
+ * xC: /deop and /devoice without arguments will use the client's user
+
+ * xC: /set +=/-= now treats its argument as a string array
+
+ * xC: made "/help /command" work the same way as "/help command" does
+
+ * xC: /ban and /unban don't mangle extended bans anymore
+
+ * xC: joining new channels no longer switches to their buffer automatically
+   if the current input line isn't empty
+
+ * censor.lua: now stripping colours from censored messages;
+   their attributes are also configurable rather than always black on black
+
+
+1.1.0 (2020-10-31) "What Do You Mean By 'This Isn't Germany'?"
+
+ * xC: made fancy-prompt.lua work with libedit
+
+ * xD: fixed a regression with an unspecified "bind_host"
+
+ * Miscellaneous minor improvements
+
+
+1.0.0 (2020-10-29) "We're Finally There!"
+
+ * Coming with real manual pages instead of help2man-generated stubs
+
+ * xC: added support for more IRC colours and strike-through text (M-m x)
+
+ * xC: now tolerating all UTF-8 messages cut off by the server
+
+ * xC: disabled "behaviour.backlog_helper_strip_formatting" by default
+   since the relevant issue with ACS terminfo entries has been resolved
+
+ * xC: enabled word wrapping in the backlog by default
+
+ * xC: made the unread marker span the whole line, with a configurable
+   character; the previous behaviour can be obtained by setting it empty
+
+ * xC: fixed the prompt not showing back up after exiting a backlog helper
+   when an external event has provoked an attempt to change it
+
+ * xC: now watching fellow channel users' away status when the server
+   supports the away-notify capability; indicated by italicised nicknames
+
+ * xC: added a plugin to highlight prime numbers in incoming messages
+
+ * xD: make sure an unspecified "bind_host" binds to both IPv4 and IPv6
+
+ * xB: install plugins to /usr/share and look for them in XDG data dirs
+
+ * Miscellaneous little fixes
+
+
+0.9.8 (2020-09-02) "Yep, Still Using It"
+
+ * xC: fixed a crash and prompt attribute output in libedit 20191231-3.1,
+   though users are officially discouraged from using this library
+
+ * xC: fixed Lua 5.4 build, so far the support is experimental
+
+ * Miscellaneous little fixes
+
+
+0.9.7 (2018-10-21) "Business as Usual"
+
+ * xD: fix wildcard handling in WHOIS
+
+ * xD: properly handle STATS without parametetrs
+
+ * xD: abort earlier when an invalid mode character is detected while
+   processing channel MODE messages
+
+ * xD: do not send NICK notifications when the nickname doesn't really change
+
+ * xD: fix hostname string verification (only used for "server_name")
+
+
+0.9.6 (2018-06-22) "I've Been Sitting Here All This Time"
+
+ * Code has been relicensed to 0BSD and moved to a private git hosting
+
+ * Fix LibreSSL compatibility
+
+ * xC: a second /disconnect cuts the connection by force
+
+ * xC: send a QUIT message to the IRC server on Ctrl-C
+
+ * xC: add a Slack plugin (even though the gateway's now defunct)
+
+ * xC: show an error message on log write failure
+
+ * xC: fix parsing of literal IPv6 addresses with port numbers
+
+ * xC: fix some error messages
+
+ * xC: workaround a Readline bug in the fancy-prompt.lua plugin
+
+ * xD: fix two memory leaks
+
+ * xD: improve error handling for incoming connections
+
+ * xD: disable TLS session reuse
+
+
+0.9.5 (2016-12-30) "It's Time"
+
+ * Better support for the KILL command
+
+ * xC: export many more fields to the Lua API, add a prompt hook
+
+ * xC: show channel user count in the prompt
+
+ * xC: allow hiding join/part messages and other noise (Meta-Shift-H)
+
+ * xC: allow autojoining channels with keys
+
+ * xC: rejoin channels with keys on reconnect
+
+ * xC: make /query without arguments just open the buffer
+
+ * xC: add a censor plugin
+
+ * xC: die on configuration parse errors
+
+ * xC: request channel modes also on rejoin
+
+ * xC: don't show remembered channel modes on parted channels
+
+ * xC: fix highlight detection in colored text
+
+ * xC: fix CTCP handling for the real world and don't decode X-QUOTEs
+
+ * xC: add support for OpenSSL 1.1.0
+
+
+0.9.4 (2016-04-28) "Oops"
+
+ * xC: fix crash on characters invalid in Windows-1252
+
+ * xC: add an auto-rejoin plugin
+
+ * xC: better date change messages with customizable formatting;
+   now also used in the backlog, so it looks closer to regular output
+
+ * xB: add a calc plugin providing a basic Scheme REPL
+
+ * xB: add a seen plugin
+
+ * xD, xB: use pledge(2) on OpenBSD
+
+
 0.9.3 (2016-03-27) "Doesn't Even Suck"
 
  * Use TLS Server Name Indication when connecting to servers
 
- * degesch: now we erase the screen before displaying buffers
+ * xC: now we erase the screen before displaying buffers
 
- * degesch: implemented word wrapping in buffers
+ * xC: implemented word wrapping in buffers
 
- * degesch: added autocomplete for /topic
+ * xC: added autocomplete for /topic
 
- * degesch: Lua API was improved and extended
+ * xC: Lua API was improved and extended
 
- * degesch: added a basic last.fm "now playing" plugin
+ * xC: added a basic last.fm "now playing" plugin
 
- * degesch: backlog limit was made configurable
+ * xC: backlog limit was made configurable
 
- * degesch: allow changing the list of IRC capabilities to use if available
+ * xC: allow changing the list of IRC capabilities to use if available
 
- * degesch: optimize buffer memory usage
+ * xC: optimize buffer memory usage
 
- * degesch: added logging of messages sent from /quote and plugins
+ * xC: added logging of messages sent from /quote and plugins
 
- * degesch: M-! and M-a to go to the next buffer in order with
+ * xC: M-! and M-a to go to the next buffer in order with a highlight
-   a highlight or new activity respectively
+   or new activity respectively
 
- * degesch: added --format for previewing things like MOTD files
+ * xC: added --format for previewing things like MOTD files
 
- * degesch: added /buffer goto supporting case insensitive partial matches
+ * xC: added /buffer goto supporting case insensitive partial matches
 
- * kike: add support for IRCv3.2 server-time
+ * xD: add support for IRCv3.2 server-time
 
- * ZyklonB: plugins now run in a dedicated data directory
+ * xB: plugins now run in a dedicated data directory
 
- * ZyklonB: added a factoids plugin
+ * xB: added a factoids plugin
 
  * Remote addresses are now resolved asynchronously
 
@@ -40,28 +239,28 @@
 
 0.9.2 (2015-12-31)
 
- * degesch: added rudimentary support for Lua scripting
+ * xC: added rudimentary support for Lua scripting
 
- * degesch: added detection of pasting, so that it doesn't trigger other
+ * xC: added detection of pasting, so that it doesn't trigger other
    keyboard shortcuts, such as for autocomplete
 
- * degesch: added auto-away capability
+ * xC: added auto-away capability
 
- * degesch: added an /oper command
+ * xC: added an /oper command
 
- * degesch: libedit backend works again
+ * xC: libedit backend works again
  
- * degesch: added capability to edit the input line using VISUAL/EDITOR
+ * xC: added capability to edit the input line using VISUAL/EDITOR
 
- * degesch: added Meta-Tab to switch to the last used buffer
+ * xC: added Meta-Tab to switch to the last used buffer
 
- * degesch: correctly respond to stopping and resuming (SIGTSTP)
+ * xC: correctly respond to stopping and resuming (SIGTSTP)
 
- * degesch: fixed decoding of text formatting
+ * xC: fixed decoding of text formatting
 
- * degesch: unseen PMs now show up as highlights
+ * xC: unseen PMs now show up as highlights
 
- * degesch: various bugfixes
+ * xC: various bugfixes
 
 
 0.9.1 (2015-09-25)
@@ -72,23 +271,23 @@
 
  * Pulled in kqueue support
 
- * degesch: added backlog/scrollback functionality using less(1)
+ * xC: added backlog/scrollback functionality using less(1)
 
- * degesch: made showing the entire set of channel mode user prefixes optional
+ * xC: made showing the entire set of channel mode user prefixes optional
 
- * degesch: nicknames in /names are now ordered
+ * xC: nicknames in /names are now ordered
 
- * degesch: nicknames now use the 256-color terminal palette if available
+ * xC: nicknames now use the 256-color terminal palette if available
 
- * degesch: now we skip entries in the "addresses" list that can't be resolved
+ * xC: now we skip entries in the "addresses" list that can't be resolved
    to an address, along with displaying a more helpful message
 
- * degesch: joins, parts, nick changes and quits don't count as new buffer
+ * xC: joins, parts, nick changes and quits don't count as new buffer
    activity anymore
 
- * degesch: added Meta-H to open the full log file
+ * xC: added Meta-H to open the full log file
 
- * degesch: various bugfixes and little improvements
+ * xC: various bugfixes and little improvements
 
 
 0.9.0 (2015-07-23)

README.adoc

@@ -1,33 +1,34 @@
 uirc3
 =====
-:compact-option:
 
-The unethical IRC trinity.  This project consists of an experimental IRC client,
+The unreasonable IRC trinity.  This project consists of an IRC client, daemon,
-daemon, and bot.  It's all you're ever going to need for chatting, as long as
+and bot.  It's all you're ever going to need for chatting, as long as you can
-you can make do with minimalist software.
+make do with minimalist software.
 
-All of them have these potentially interesting properties:
+They have these potentially interesting properties:
 
- - full IPv6 support
+ - supporting IRCv3, SOCKS, IPv6, TLS (including client certificates)
- - TLS support, including client certificates
+ - lean on dependencies
- - lean on dependencies (with the exception of 'degesch')
  - compact and arguably easy to hack on
- - permissive license
+ - maximally permissive license
 
-degesch
+xC
--------
+--
 The IRC client.  It is largely defined by being built on top of GNU Readline
 that has been hacked to death.  Its interface should feel somewhat familiar for
 weechat or irssi users.
 
-This is the largest application within the project.  It has most of the stuff
+image::xC.png[align="center"]
-you'd expect of an IRC client, such as being able to set up multiple servers,
-a powerful configuration system, integrated help, text formatting, CTCP queries,
-automatic splitting of overlong messages, autocomplete, logging to file,
-auto-away, command aliases and rudimentary support for Lua scripting.
 
-kike
+This is the core of the project.  It has most of the stuff you'd expect of
-----
+an IRC client, such as being multiserver, a powerful configuration system,
+integrated help, text formatting, automatic splitting of overlong messages,
+multiline editing, bracketed paste support, decent word wrapping, autocomplete,
+logging, CTCP queries, auto-away, command aliases, and basic support for Lua
+scripting.  As a unique bonus, you can launch a full text editor from within.
+
+xD
+--
 The IRC daemon.  It is designed to be used as a regular user application rather
 than a system-wide daemon.  If all you want is a decent, minimal IRCd for
 testing purposes or a small network of respectful users (or bots), this one will
@@ -35,10 +36,8 @@ do it just fine.
 
 Notable features:
 
- - TLS autodetection (why doesn't everyone have this?), using secure defaults
+ - TLS autodetection (I'm still wondering why everyone doesn't have this)
  - IRCop authentication via TLS client certificates
- - epoll/kqueue support; this means that it should be able to handle quite
-   a number of concurrent user connections
  - partial IRCv3 support
 
 Not supported:
@@ -46,43 +45,44 @@ Not supported:
  - server linking (which also means no services); I consider existing protocols
    for this purpose ugly and tricky to implement correctly; I've also found no
    use for this feature yet
- - online changes to configuration; the configuration system from degesch could
+ - online changes to configuration; the configuration system from 'xC' could
    be used to implement this feature if needed
  - limits of almost any kind, just connections and mode `+l`
 
-ZyklonB
+This program has been
--------
+https://git.janouch.name/p/haven/src/branch/master/hid[ported to Go],
-The IRC bot.  It builds upon the concept of my other VitaminA IRC bot.  The main
+and development continues over there.
-characteristic of these two bots is that they run plugins as coprocesses, which
-allows for enhanced reliability and programming language freedom.
 
-While originally intended to be a simple rewrite of the original AWK bot in C,
+xB
-it fairly quickly became a playground, and it eventually got me into writing
+--
-the rest of the package.
+The IRC bot.  While originally intended to be a simple rewrite of my old GNU AWK
+bot in C, it fairly quickly became a playground, and it eventually got me into
+writing the rest of this package.
 
-It survives crashes, server disconnects and timeouts, and also has native SOCKS
+Its main characteristic is that it runs plugins as coprocesses, allowing for
-support (even though socksify can add that easily to any program).
+enhanced reliability and programming language freedom.  Moreover, it recovers
+from any crashes, and offers native SOCKS support (even though socksify can add
+that easily to any program).
 
 Packages
 --------
 Regular releases are sporadic.  git master should be stable enough.  You can get
-a package with the latest development version from Archlinux's AUR, or from
+a package with the latest development version from Archlinux's AUR.
-openSUSE Build Service for the rest of mainstream distributions.  Consult the
-list of repositories and their respective links at:
-
-https://build.opensuse.org/project/repositories/home:pjanouch:git
 
 Building
 --------
-Build dependencies: CMake, pkg-config, help2man, awk, sh, liberty (included) +
+Build dependencies: CMake, pkg-config, asciidoctor, awk, liberty (included) +
 Runtime dependencies: openssl +
-Additionally for degesch: curses, libffi, lua >= 5.3 (optional),
+Additionally for 'xC': curses, libffi, lua >= 5.3 (optional),
                        readline >= 6.0 or libedit >= 2013-07-12
 
- $ git clone --recursive https://github.com/pjanouch/uirc3.git
+Avoid libedit if you can, in general it works but at the moment history is
+acting up and I have no clue about fixing it.
+
+ $ git clone --recursive https://git.janouch.name/p/uirc3.git
  $ mkdir uirc3/build
  $ cd uirc3/build
- $ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug \
+ $ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=RelWithDebInfo \
             -DWANT_READLINE=ON -DWANT_LIBEDIT=OFF -DWANT_LUA=ON
  $ make
 
@@ -90,78 +90,105 @@ To install the application, you can do either the usual:
 
  # make install
 
-Or you can try telling CMake to make a package for you.  For Debian it is:
+Or you can try telling CMake to make a package for you:
 
- $ cpack -G DEB
+ $ cpack -G DEB  # also supported: RPM, FreeBSD
  # dpkg -i uirc3-*.deb
 
-Note that for versions of CMake before 2.8.9, you need to prefix `cpack` with
-`fakeroot` or file ownership will end up wrong.
-
 Usage
 -----
-'degesch' has in-program configuration.  Just run it and read the instructions.
+'xC' has in-program configuration.  Just run it and read the instructions.
+Consult its link:xC.adoc[man page] for details about the interface.
 
 For the rest you might want to generate a configuration file:
 
- $ zyklonb --write-default-config
+ $ xB --write-default-config
- $ kike --write-default-config
+ $ xD --write-default-config
 
 After making any necessary edits to the file (there are comments to aid you in
 doing that), simply run the appropriate program with no arguments:
 
- $ zyklonb
+ $ xB
- $ kike
+ $ xD
 
-'ZyklonB' stays running in the foreground, therefore I recommend launching it
+'xB' stays running in the foreground, therefore I recommend launching it inside
-inside a Screen or tmux session.
+a Screen or tmux session.
 
-'kike', on the other hand, immediately forks into the background.  Use the PID
+'xD', on the other hand, immediately forks into the background.  Use the PID
 file or something like `killall` if you want to terminate it.  You can run it
 as a `forking` type systemd user service.
 
 Client Certificates
 -------------------
-'kike' uses SHA1 fingerprints of TLS client certificates to authenticate users.
+'xC' will use the SASL EXTERNAL method to authenticate using the TLS client
+certificate specified by the respective server's `tls_cert` option if you add
+`sasl` to the `capabilities` option and the server supports this.
+
+'xD' uses SHA-1 fingerprints of TLS client certificates to authenticate users.
 To get the fingerprint from a certificate file in the required form, use:
 
  $ openssl x509 -in public.pem -outform DER | sha1sum
 
-Custom Key Bindings in degesch
+Custom Key Bindings in xC
-------------------------------
+-------------------------
-The default and preferred frontend used in 'degesch' is GNU Readline.  This
+The default and preferred frontend used in 'xC' is GNU Readline.  This means
-means that you can change your bindings by editing '~/.inputrc'.  For example:
+that you can change your bindings by editing '~/.inputrc'.  For example:
+
 ....
 # Preload with system-wide settings
 $include /etc/inputrc
 
 # Make M-left and M-right reorder buffers
-$if degesch
+$if xC
 "\e\e[C": move-buffer-right
 "\e\e[D": move-buffer-left
 $endif
 ....
+
 Consult the source code and the GNU Readline manual for a list of available
 functions.  Also refer to the latter for the exact syntax of this file.
 Beware that you can easily break the program if you're not careful.
 
+How do I make xC look like the screenshot?
+------------------------------------------
+First of all, you must build it with Lua support.  With the defaults, 'xC'
+doesn't look too fancy because I don't want to depend on Lua or 256-colour
+terminals.  In addition to that, I appear to be one of the few people who use
+black on white terminals.
+
+ /set behaviour.date_change_line = "%a %e %b %Y"
+ /set behaviour.plugin_autoload += "fancy-prompt.lua"
+ /set behaviour.backlog_helper = "LESSSECURE=1 less -R +Gb1d -Ps'Backlog ?ltlines %lt-%lb?L/%L. .?e(END):?pB%pB\\%..'"
+ /set attributes.userhost = "\x1b[38;5;109m"
+ /set attributes.join = "\x1b[38;5;108m"
+ /set attributes.part = "\x1b[38;5;138m"
+ /set attributes.external = "\x1b[38;5;248m"
+ /set attributes.timestamp = "\x1b[48;5;255m\x1b[38;5;250m"
+ /set attributes.read_marker = "\x1b[38;5;202m"
+
+Configuration profiles
+----------------------
+Even though the applications don't directly support configuration profiles,
+they conform to the XDG standard, and thus you can change the location they
+load configuration from via XDG_CONFIG_HOME (normally '~/.config') and the
+location where store their data via XDG_DATA_HOME (normally '~/.local/share').
+
+It would be relatively easy to make the applications assume whatever name you
+run them under (for example by using symbolic links), and load different
+configurations accordingly, but I consider it rather messy and unnecessary.
+
 Contributing and Support
 ------------------------
-Use this project's GitHub to report any bugs, request features, or submit pull
+Use https://git.janouch.name/p/uirc3 to report any bugs, request features,
-requests.  If you want to discuss this project, or maybe just hang out with
+or submit pull requests.  `git send-email` is tolerated.  If you want to discuss
-the developer, feel free to join me at irc://irc.janouch.name, channel #dev.
+the project, feel free to join me at ircs://irc.janouch.name, channel #dev.
 
-Disclaimer
+Bitcoin donations are accepted at: 12r5uEWEgcHC46xd64tt3hHt9EUvYYDHe9
-----------
-I am not an antisemitist, I'm just being an offensive asshole with the naming.
-And no, I'm not going to change the names.
 
 License
 -------
-'uirc3' is written by Přemysl Janouch <p.janouch@gmail.com>.
+This software is released under the terms of the 0BSD license, the text of which
+is included within the package along with the list of authors.
 
-You may use the software under the terms of the ISC license, the text of which
+Note that 'xC' becomes GPL-licensed when you link it against GNU Readline,
-is included within the package, or, at your option, you may relicense the work
+but that is not a concern of this source package.  The licenses are compatible.
-under the MIT or the Modified BSD License, as listed at the following site:
-
-http://www.gnu.org/licenses/license-list.html

common.c

@@ -1,11 +1,10 @@
 /*
  * common.c: common functionality
  *
- * Copyright (c) 2014 - 2015, Přemysl Janouch <p.janouch@gmail.com>
+ * Copyright (c) 2014 - 2020, Přemysl Eric Janouch <p@janouch.name>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
+ * purpose with or without fee is hereby granted.
- * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
@@ -23,28 +22,60 @@
 #define LIBERTY_WANT_PROTO_IRC
 
 #ifdef WANT_SYSLOG_LOGGING
-	#define print_fatal_data    ((void *) LOG_ERR)
+#define print_fatal_data    ((void *) LOG_ERR)
-	#define print_error_data    ((void *) LOG_ERR)
+#define print_error_data    ((void *) LOG_ERR)
-	#define print_warning_data  ((void *) LOG_WARNING)
+#define print_warning_data  ((void *) LOG_WARNING)
-	#define print_status_data   ((void *) LOG_INFO)
+#define print_status_data   ((void *) LOG_INFO)
-	#define print_debug_data    ((void *) LOG_DEBUG)
+#define print_debug_data    ((void *) LOG_DEBUG)
 #endif // WANT_SYSLOG_LOGGING
 
 #include "liberty/liberty.c"
 #include <arpa/inet.h>
 #include <netinet/tcp.h>
 
-/// Shorthand to set an error and return failure from the function
+static void
-#define FAIL(...)                                                              \
+init_openssl (void)
-	BLOCK_START                                                                \
+{
-		error_set (e, __VA_ARGS__);                                            \
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER
-		return 0;                                                              \
+	SSL_library_init ();
-	BLOCK_END
+	// XXX: this list is probably not complete
+	atexit (EVP_cleanup);
+	SSL_load_error_strings ();
+	atexit (ERR_free_strings);
+#else
+	// Cleanup is done automatically via atexit()
+	OPENSSL_init_ssl (0, NULL);
+#endif
+}
 
 // --- To be moved to liberty --------------------------------------------------
 
+// FIXME: in xssl_get_error() we rely on error reasons never being NULL (i.e.,
+//   all loaded), which isn't very robust.
+// TODO: check all places where this is used and see if we couldn't gain better
+//   information by piecing together some other subset of data from the error
+//   stack.  Most often, this is used in an error_set() context, which would
+//   allow us to allocate memory instead of returning static strings.
+static const char *
+xerr_describe_error (void)
+{
+	unsigned long err = ERR_get_error ();
+	if (!err)
+		return "undefined error";
+
+	const char *reason = ERR_reason_error_string (err);
+	do
+		// Not thread-safe, not a concern right now--need a buffer
+		print_debug ("%s", ERR_error_string (err, NULL));
+	while ((err = ERR_get_error ()));
+
+	if (!reason)
+		return "cannot retrieve error description";
+	return reason;
+}
+
 static ssize_t
-str_vector_find (const struct str_vector *v, const char *s)
+strv_find (const struct strv *v, const char *s)
 {
 	for (size_t i = 0; i < v->len; i++)
 		if (!strcmp (v->vector[i], s))
@@ -67,120 +98,6 @@ unixtime_msec (long *msec)
 	return tp.tv_sec;
 }
 
-/// This differs from the non-unique version in that we expect the filename
-/// to be something like a pattern for mkstemp(), so the resulting path can
-/// reside in a system-wide directory with no risk of a conflict.
-static char *
-resolve_relative_runtime_unique_filename (const char *filename)
-{
-	struct str path;
-	str_init (&path);
-
-	const char *runtime_dir = getenv ("XDG_RUNTIME_DIR");
-	const char *tmpdir = getenv ("TMPDIR");
-	if (runtime_dir && *runtime_dir == '/')
-		str_append (&path, runtime_dir);
-	else if (tmpdir && *tmpdir == '/')
-		str_append (&path, tmpdir);
-	else
-		str_append (&path, "/tmp");
-	str_append_printf (&path, "/%s/%s", PROGRAM_NAME, filename);
-
-	// Try to create the file's ancestors;
-	// typically the user will want to immediately create a file in there
-	const char *last_slash = strrchr (path.str, '/');
-	if (last_slash && last_slash != path.str)
-	{
-		char *copy = xstrndup (path.str, last_slash - path.str);
-		(void) mkdir_with_parents (copy, NULL);
-		free (copy);
-	}
-	return str_steal (&path);
-}
-
-static bool
-xwrite (int fd, const char *data, size_t len, struct error **e)
-{
-	size_t written = 0;
-	while (written < len)
-	{
-		ssize_t res = write (fd, data + written, len - written);
-		if (res >= 0)
-			written += res;
-		else if (errno != EINTR)
-			FAIL ("%s", strerror (errno));
-	}
-	return true;
-}
-
-// --- Simple network I/O ------------------------------------------------------
-
-// TODO: move to liberty and remove from dwmstatus.c as well
-
-#define SOCKET_IO_OVERFLOW (8 << 20)    ///< How large a read buffer can be
-
-enum socket_io_result
-{
-	SOCKET_IO_OK,                       ///< Completed successfully
-	SOCKET_IO_EOF,                      ///< Connection shut down by peer
-	SOCKET_IO_ERROR                     ///< Connection error
-};
-
-static enum socket_io_result
-socket_io_try_read (int socket_fd, struct str *rb, struct error **e)
-{
-	// We allow buffering of a fair amount of data, however within reason,
-	// so that it's not so easy to flood us and cause an allocation failure
-	ssize_t n_read;
-	while (rb->len < SOCKET_IO_OVERFLOW)
-	{
-		str_ensure_space (rb, 4096);
-		n_read = recv (socket_fd, rb->str + rb->len,
-			rb->alloc - rb->len - 1 /* null byte */, 0);
-
-		if (n_read > 0)
-		{
-			rb->str[rb->len += n_read] = '\0';
-			continue;
-		}
-		if (n_read == 0)
-			return SOCKET_IO_EOF;
-
-		if (errno == EAGAIN)
-			return SOCKET_IO_OK;
-		if (errno == EINTR)
-			continue;
-
-		error_set (e, "%s", strerror (errno));
-		return SOCKET_IO_ERROR;
-	}
-	return SOCKET_IO_OK;
-}
-
-static enum socket_io_result
-socket_io_try_write (int socket_fd, struct str *wb, struct error **e)
-{
-	ssize_t n_written;
-	while (wb->len)
-	{
-		n_written = send (socket_fd, wb->str, wb->len, 0);
-		if (n_written >= 0)
-		{
-			str_remove_slice (wb, 0, n_written);
-			continue;
-		}
-
-		if (errno == EAGAIN)
-			return SOCKET_IO_OK;
-		if (errno == EINTR)
-			continue;
-
-		error_set (e, "%s", strerror (errno));
-		return SOCKET_IO_ERROR;
-	}
-	return SOCKET_IO_OK;
-}
-
 // --- Logging -----------------------------------------------------------------
 
 static void
@@ -762,7 +679,7 @@ socks_try_fill_read_buffer (struct socks_connector *self, size_t n)
 		return true;
 
 	ssize_t received;
-	str_ensure_space (&self->read_buffer, remains);
+	str_reserve (&self->read_buffer, remains);
 	do
 		received = recv (self->socket_fd,
 			self->read_buffer.str + self->read_buffer.len, remains, 0);
@@ -786,8 +703,8 @@ socks_call_on_data (struct socks_connector *self)
 	if (self->read_buffer.len < to_consume)
 		return true;
 
-	struct msg_unpacker unpacker;
+	struct msg_unpacker unpacker =
-	msg_unpacker_init (&unpacker, self->read_buffer.str, self->read_buffer.len);
+		msg_unpacker_make (self->read_buffer.str, self->read_buffer.len);
 	bool result = self->on_data (self, &unpacker);
 	str_remove_slice (&self->read_buffer, 0, to_consume);
 	return result;
@@ -852,16 +769,16 @@ socks_connector_init (struct socks_connector *self, struct poller *poller)
 {
 	memset (self, 0, sizeof *self);
 
-	poller_fd_init (&self->socket_event, poller, (self->socket_fd = -1));
+	self->socket_event = poller_fd_make (poller, (self->socket_fd = -1));
 	self->socket_event.dispatcher = (poller_fd_fn) socks_connector_on_ready;
 	self->socket_event.user_data = self;
 
-	poller_timer_init (&self->timeout, poller);
+	self->timeout = poller_timer_make (poller);
 	self->timeout.dispatcher = (poller_timer_fn) socks_connector_on_timeout;
 	self->timeout.user_data = self;
 
-	str_init (&self->read_buffer);
+	self->read_buffer = str_make ();
-	str_init (&self->write_buffer);
+	self->write_buffer = str_make ();
 }
 
 static void
@@ -962,8 +879,8 @@ static struct ctcp_chunk *
 ctcp_chunk_new (void)
 {
 	struct ctcp_chunk *self = xcalloc (1, sizeof *self);
-	str_init (&self->tag);
+	self->tag = str_make ();
-	str_init (&self->text);
+	self->text = str_make ();
 	return self;
 }
 
@@ -1023,6 +940,13 @@ ctcp_intra_decode (const char *chunk, size_t len, struct str *output)
 	}
 }
 
+// According to the original CTCP specification we should use
+// ctcp_intra_decode() on all parts, however no one seems to use that
+// and it breaks normal text with backslashes
+#ifndef SUPPORT_CTCP_X_QUOTES
+#define ctcp_intra_decode(s, len, output) str_append_data (output, s, len)
+#endif
+
 static void
 ctcp_parse_tagged (const char *chunk, size_t len, struct ctcp_chunk *output)
 {
@@ -1045,15 +969,11 @@ ctcp_parse_tagged (const char *chunk, size_t len, struct ctcp_chunk *output)
 static struct ctcp_chunk *
 ctcp_parse (const char *message)
 {
-	struct str m;
+	struct str m = str_make ();
-	str_init (&m);
 	ctcp_low_level_decode (message, &m);
 
 	struct ctcp_chunk *result = NULL, *result_tail = NULL;
 
-	// According to the original CTCP specification we should use
-	// ctcp_intra_decode() on all parts, however no one seems to
-	// use that and it breaks normal text with backslashes
 	size_t start = 0;
 	bool in_ctcp = false;
 	for (size_t i = 0; i < m.len; i++)
@@ -1077,7 +997,7 @@ ctcp_parse (const char *message)
 		if (my_is_ctcp)
 			ctcp_parse_tagged (m.str + my_start, i - my_start, chunk);
 		else
-			str_append_data (&chunk->text, m.str + my_start, i - my_start);
+			ctcp_intra_decode (m.str + my_start, i - my_start, &chunk->text);
 		LIST_APPEND_WITH_TAIL (result, result_tail, chunk);
 	}
 
@@ -1091,7 +1011,7 @@ ctcp_parse (const char *message)
 			chunk->is_partial = true;
 		}
 		else
-			str_append_data (&chunk->text, m.str + start, m.len - start);
+			ctcp_intra_decode (m.str + start, m.len - start, &chunk->text);
 		LIST_APPEND_WITH_TAIL (result, result_tail, chunk);
 	}
 

config.h.in

@@ -2,7 +2,6 @@
 #define CONFIG_H
 
 #define PROGRAM_VERSION "${project_version}"
-#define ZYKLONB_PLUGIN_DIR "${CMAKE_INSTALL_PREFIX}/${zyklonb_plugin_dir}"
 
 #cmakedefine HAVE_READLINE
 #cmakedefine HAVE_EDITLINE

plugins/xB/calc

@@ -0,0 +1,241 @@
+#!/usr/bin/env guile
+
+  xB calc plugin, basic Scheme evaluator
+
+  Copyright 2016 Přemysl Eric Janouch
+  See the file LICENSE for licensing information.
+
+!#
+
+(import (rnrs (6)))
+(use-modules ((rnrs) :version (6)))
+
+; --- Message parsing ----------------------------------------------------------
+
+(define-record-type message (fields prefix command params))
+(define (parse-message line)
+  (let f ([parts '()] [chars (string->list line)])
+    (define (take-word w chars)
+      (if (or (null? chars) (eqv? (car chars) #\x20))
+        (f (cons (list->string (reverse w)) parts)
+           (if (null? chars) chars (cdr chars)))
+        (take-word (cons (car chars) w) (cdr chars))))
+    (if (null? chars)
+      (let ([data (reverse parts)])
+        (when (< (length data) 2)
+          (error 'parse-message "invalid message"))
+        (make-message (car data) (cadr data) (cddr data)))
+      (if (null? parts)
+        (if (eqv? (car chars) #\:)
+          (take-word '() (cdr chars))
+          (f (cons #f parts) chars))
+        (if (eqv? (car chars) #\:)
+          (f (cons (list->string (cdr chars)) parts) '())
+          (take-word '() chars))))))
+
+; --- Utilities ----------------------------------------------------------------
+
+(define (display-exception e port)
+  (define (puts . x)
+    (for-all (lambda (a) (display a port)) x)
+    (newline port))
+
+  (define (record-fields rec)
+    (let* ([rtd (record-rtd rec)]
+           [v (record-type-field-names rtd)]
+           [len (vector-length v)])
+      (map (lambda (k i) (cons k ((record-accessor rtd i) rec)))
+        (vector->list v)
+        (let c ([i len] [ls '()])
+          (if (= i 0) ls (c (- i 1) (cons (- i 1) ls)))))))
+
+  (puts "Caught " (record-type-name (record-rtd e)))
+  (for-all
+    (lambda (subtype)
+      (puts "  " (record-type-name (record-rtd subtype)))
+      (for-all
+        (lambda (field) (puts "    " (car field) ": " (cdr field)))
+        (record-fields subtype)))
+    (simple-conditions e)))
+
+; XXX - we have to work around Guile's lack of proper eol-style support
+(define xc (make-transcoder (latin-1-codec) 'lf 'replace))
+(define irc-input-port (transcoded-port (standard-input-port) xc))
+(define irc-output-port (transcoded-port (standard-output-port) xc))
+
+(define (send . message)
+  (for-all (lambda (x) (display x irc-output-port)) message)
+  (display #\return irc-output-port)
+  (newline irc-output-port)
+  (flush-output-port irc-output-port))
+
+(define (get-line-crlf port)
+  (define line (get-line port))
+  (if (eof-object? line) line
+    (let ([len (string-length line)])
+      (if (and (> len 0) (eqv? (string-ref line (- len 1)) #\return))
+        (substring line 0 (- len 1)) line))))
+
+(define (get-config name)
+  (send "XB get_config :" name)
+  (car (message-params (parse-message (get-line-crlf irc-input-port)))))
+
+(define (extract-nick prefix)
+  (do ([i 0 (+ i 1)] [len (string-length prefix)])
+      ([or (= i len) (char=? #\! (string-ref prefix i))]
+       [substring prefix 0 i])))
+
+(define (string-after s start)
+  (let ([s-len (string-length s)] [with-len (string-length start)])
+    (and (>= s-len with-len)
+         (string=? (substring s 0 with-len) start)
+         (substring s with-len s-len))))
+
+; --- Calculator ---------------------------------------------------------------
+
+; Evaluator derived from the example in The Scheme Programming Language.
+;
+; Even though EVAL with a carefully crafted environment would also do a good
+; job at sandboxing, it would probably be impossible to limit execution time...
+
+(define (env-new formals actuals env)
+  (cond [(null? formals) env]
+        [(symbol? formals) (cons (cons formals actuals) env)]
+        [else (cons (cons (car formals) (car actuals))
+                    (env-new (cdr formals) (cdr actuals) env))]))
+(define (env-lookup var env) (cdr (assq var env)))
+(define (env-assign var val env) (set-cdr! (assq var env) val))
+
+(define (check-reductions r)
+  (if (= (car r) 0)
+    (error 'check-reductions "reduction limit exceeded")
+    (set-car! r (- (car r) 1))))
+
+; TODO - think about implementing more syntactical constructs,
+;   however there's not much point in having anything else in a calculator...
+(define (exec expr r env)
+  (check-reductions r)
+  (cond [(symbol? expr) (env-lookup expr env)]
+        [(pair? expr)
+         (case (car expr)
+           [(quote) (cadr expr)]
+           [(lambda) (lambda vals
+                       (let ([env (env-new (cadr expr) vals env)])
+                         (let loop ([exprs (cddr expr)])
+                           (if (null? (cdr exprs))
+                             (exec (car exprs) r env)
+                             (begin (exec (car exprs) r env)
+                                    (loop (cdr exprs)))))))]
+           [(if) (if (exec (cadr expr) r env)
+                   (exec (caddr expr) r env)
+                   (exec (cadddr expr) r env))]
+           [(set!) (env-assign (cadr expr) (exec (caddr expr) r env) env)]
+           [else (apply (exec (car expr) r env)
+                        (map (lambda (x) (exec x r env)) (cdr expr)))])]
+        [else expr]))
+
+(define-syntax forward
+  (syntax-rules ()
+    [(_) '()]
+    [(_ a b ...) (cons (cons (quote a) a) (forward b ...))]))
+
+; ...which can't prevent me from simply importing most of the standard library
+(define base-library
+  (forward
+    ; Equivalence, procedure predicate, booleans
+    eqv? eq? equal? procedure? boolean? boolean=? not
+    ; numbers, numerical input and output
+    number? complex? real? rational? integer?  exact? inexact? exact inexact
+    real-valued? rational-valued? integer-valued? number->string string->number
+    ; Arithmetic
+    = < > <= >= zero? positive? negative? odd? even? finite? infinite? nan?
+    min max + * - / abs div-and-mod div mod div0-and-mod0 div0 mod0
+    gcd lcm numerator denominator floor ceiling truncate round
+    rationalize exp log sin cos tan asin acos atan sqrt expt
+    make-rectangular make-polar real-part imag-part magnitude angle
+    ; Pairs and lists
+    map for-each cons car cdr caar cadr cdar cddr
+    caaar caadr cadar caddr cdaar cdadr cddar cdddr
+    caaaar caaadr caadar caaddr cadaar cadadr caddar cadddr
+    cdaaar cdaadr cdadar cdaddr cddaar cddadr cdddar cddddr
+    pair? null? list? list length append reverse list-tail list-ref
+    ; Symbols
+    symbol? symbol=? symbol->string string->symbol
+    ; Characters
+    char? char=? char<? char>? char<=? char>=?  char->integer integer->char
+    ; Strings; XXX - omitted make-string - can cause OOM
+    string? string=? string<? string>? string<=? string>=?
+    string string-length string-ref substring
+    string-append string->list list->string string-for-each string-copy
+    ; Vectors; XXX - omitted make-vector - can cause OOM
+    vector? vector vector-length vector-ref vector-set!
+    vector->list list->vector vector-fill! vector-map vector-for-each
+    ; Control features
+    apply call/cc values call-with-values dynamic-wind))
+(define extended-library
+  (forward
+    char-upcase char-downcase char-titlecase char-foldcase
+    char-ci=? char-ci<? char-ci>? char-ci<=? char-ci>=?
+    char-alphabetic? char-numeric? char-whitespace?
+    char-upper-case? char-lower-case? char-title-case?
+    string-upcase string-downcase string-titlecase string-foldcase
+    string-ci=? string-ci<? string-ci>? string-ci<=? string-ci>=?
+    find for-all exists filter partition fold-left fold-right
+    remp remove remv remq memp member memv memq assp assoc assv assq cons*
+    list-sort vector-sort vector-sort!
+    bitwise-not bitwise-and bitwise-ior bitwise-xor bitwise-if
+    bitwise-bit-count bitwise-length bitwise-first-bit-set bitwise-bit-set?
+    bitwise-copy-bit bitwise-bit-field bitwise-copy-bit-field
+    bitwise-arithmetic-shift bitwise-rotate-bit-field bitwise-reverse-bit-field
+    bitwise-arithmetic-shift-left bitwise-arithmetic-shift-right
+    set-car! set-cdr! string-set! string-fill!))
+(define (interpret expr)
+  (exec expr '(2000) (append base-library extended-library)))
+
+; We could show something a bit nicer but it would be quite Guile-specific
+(define (error-string e)
+  (map (lambda (x) (string-append " " (symbol->string x)))
+    (filter (lambda (x) (not (member x '(&who &message &irritants &guile))))
+      (map (lambda (x) (record-type-name (record-rtd x)))
+        (simple-conditions e)))))
+
+(define (calc input respond)
+  (define (stringify x)
+    (call-with-string-output-port (lambda (port) (write x port))))
+  (guard (e [else (display-exception e (current-error-port))
+                  (apply respond "caught" (error-string e))])
+    (let* ([input (open-string-input-port input)]
+           [data (let loop ()
+                   (define datum (get-datum input))
+                   (if (eof-object? datum) '() (cons datum (loop))))])
+      (call-with-values
+        (lambda () (interpret (list (append '(lambda ()) data))))
+        (lambda message
+          (for-all (lambda (x) (respond (stringify x))) message))))))
+
+; --- Main loop ----------------------------------------------------------------
+
+(define prefix (get-config "prefix"))
+(send "XB register")
+
+(define (process msg)
+  (when (string-ci=? (message-command msg) "PRIVMSG")
+    (let* ([nick (extract-nick (message-prefix msg))]
+           [target (car (message-params msg))]
+           [response-begin
+             (apply string-append "PRIVMSG "
+               (if (memv (string-ref target 0) (string->list "#&!+"))
+                 `(,target " :" ,nick ": ") `(,nick " :")))]
+           [respond (lambda args (apply send response-begin args))]
+           [text (cadr (message-params msg))]
+           [input (or (string-after text (string-append prefix "calc "))
+                      (string-after text (string-append prefix "= ")))])
+      (when input (calc input respond)))))
+
+(let main-loop ()
+  (define line (get-line-crlf irc-input-port))
+  (unless (eof-object? line)
+    (guard (e [else (display-exception e (current-error-port))])
+      (unless (string=? "" line)
+        (process (parse-message line))))
+    (main-loop)))

plugins/xB/coin

@@ -1,8 +1,8 @@
 #!/usr/bin/env tclsh
 #
-# ZyklonB coin plugin, random number-based utilities
+# xB coin plugin, random number-based utilities
 #
-# Copyright 2012, 2014 Přemysl Janouch
+# Copyright 2012, 2014 Přemysl Eric Janouch
 # See the file LICENSE for licensing information.
 #
 
@@ -37,7 +37,7 @@ proc parse {line} {
 
 proc get_config {key} {
 	global msg
-	puts "ZYKLONB get_config :$key"
+	puts "XB get_config :$key"
 	gets stdin line
 	parse $line
 	return [lindex $msg(param) 0]
@@ -53,7 +53,7 @@ fconfigure stdin -translation crlf -encoding iso8859-1
 fconfigure stdout -translation crlf -encoding iso8859-1
 
 set prefix [get_config prefix]
-puts "ZYKLONB register"
+puts "XB register"
 
 set eightball [list \
 	"It is certain" \

plugins/xB/eval

@@ -1,8 +1,8 @@
 #!/usr/bin/awk -f
 #
-# ZyklonB eval plugin, LISP-like expression evaluator
+# xB eval plugin, LISP-like expression evaluator
 #
-# Copyright 2013, 2014 Přemysl Janouch
+# Copyright 2013, 2014 Přemysl Eric Janouch
 # See the file LICENSE for licensing information.
 #
 
@@ -15,7 +15,7 @@ BEGIN \
 
 	prefix = get_config("prefix")
 
-	print "ZYKLONB register"
+	print "XB register"
 	fflush("")
 
 	# All functions have to be in this particular array
@@ -258,7 +258,7 @@ function process_end ()
 
 function get_config (key)
 {
-	print "ZYKLONB get_config :" key
+	print "XB get_config :" key
 	fflush("")
 
 	getline

plugins/xB/factoids

@@ -1,8 +1,8 @@
 #!/usr/bin/env perl
 #
-# ZyklonB factoids plugin
+# xB factoids plugin
 #
-# Copyright 2016 Přemysl Janouch <p.janouch@gmail.com>
+# Copyright 2016 Přemysl Eric Janouch <p@janouch.name>
 # See the file LICENSE for licensing information.
 #
 
@@ -24,18 +24,18 @@ sub parse ($) {
 }
 
 sub bot_print {
-	print "ZYKLONB print :${\shift}";
+	print "XB print :${\shift}";
 }
 
 # --- Initialization -----------------------------------------------------------
 
 my %config;
 for my $name (qw(prefix)) {
-	print "ZYKLONB get_config :$name";
+	print "XB get_config :$name";
 	$config{$name} = (parse <STDIN>)->{args}->[0];
 }
 
-print "ZYKLONB register";
+print "XB register";
 
 # --- Database -----------------------------------------------------------------
 # Simple map of (factoid_name => [definitions]); all factoids are separated

plugins/xB/pomodoro

@@ -1,9 +1,9 @@
 #!/usr/bin/env ruby
 # coding: utf-8
 #
-# ZyklonB pomodoro plugin
+# xB pomodoro plugin
 #
-# Copyright 2015 Přemysl Janouch
+# Copyright 2015 Přemysl Eric Janouch
 # See the file LICENSE for licensing information.
 #
 
@@ -206,7 +206,7 @@ def parse (line)
 end
 
 def bot_print (what)
-	print "ZYKLONB print :#{what}"
+	print "XB print :#{what}"
 end
 
 # --- Initialization -----------------------------------------------------------
@@ -215,12 +215,12 @@ end
 # To read it from anywhere else, it has to be done asynchronously
 $config = {}
 [:prefix].each do |name|
-	print "ZYKLONB get_config :#{name}"
+	print "XB get_config :#{name}"
 	_, _, _, _, args = *parse($stdin.gets.chomp)
 	$config[name] = args[0]
 end
 
-print "ZYKLONB register"
+print "XB register"
 
 # --- Plugin logic -------------------------------------------------------------
 

plugins/xB/script

@@ -1,8 +1,8 @@
 #!/usr/bin/tcc -run -lm
 //
-// ZyklonB scripting plugin, using a custom stack-based language
+// xB scripting plugin, using a custom stack-based language
 //
-// Copyright 2014 Přemysl Janouch
+// Copyright 2014 Přemysl Eric Janouch
 // See the file LICENSE for licensing information.
 //
 // Just compile this file as usual (sans #!) if you don't feel like using TCC.
@@ -1964,12 +1964,12 @@ read_message (void)
 
 // --- Interfacing with the bot ------------------------------------------------
 
-#define BOT_PRINT "ZYKLONB print :script: "
+#define BOT_PRINT "XB print :script: "
 
 static const char *
 get_config (const char *key)
 {
-	printf ("ZYKLONB get_config :%s\r\n", key);
+	printf ("XB get_config :%s\r\n", key);
 	struct message *msg = read_message ();
 	if (!msg || msg->n_params <= 0)
 		exit (EXIT_FAILURE);
@@ -2298,7 +2298,7 @@ main (int argc, char *argv[])
 		printf (BOT_PRINT "%s\r\n", "runtime library initialization failed");
 
 	g_prefix = strdup (get_config ("prefix"));
-	printf ("ZYKLONB register\r\n");
+	printf ("XB register\r\n");
 	struct message *msg;
 	while ((msg = read_message ()))
 		process_message (msg);

plugins/xB/seen

@@ -0,0 +1,160 @@
+#!/usr/bin/env lua
+--
+-- xB seen plugin
+--
+-- Copyright 2016 Přemysl Eric Janouch <p@janouch.name>
+-- See the file LICENSE for licensing information.
+--
+
+function parse (line)
+	local msg = { params = {} }
+	line = line:match ("[^\r]*")
+	for start, word in line:gmatch ("()([^ ]+)") do
+		local colon = word:match ("^:(.*)")
+		if start == 1 and colon then
+			msg.prefix = colon
+		elseif not msg.command then
+			msg.command = word
+		elseif colon then
+			table.insert (msg.params, line:sub (start + 1))
+			break
+		elseif start ~= #line then
+			table.insert (msg.params, word)
+		end
+	end
+	return msg
+end
+
+function get_config (name)
+	io.write ("XB get_config :", name, "\r\n")
+	return parse (io.read ()).params[1]
+end
+
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+io.output ():setvbuf ('line')
+local prefix = get_config ('prefix')
+io.write ("XB register\r\n")
+
+local db = {}
+local db_filename = "seen.db"
+local db_garbage = 0
+
+function remember (who, where, when, what)
+	if not db[who] then db[who] = {} end
+	if db[who][where] then db_garbage = db_garbage + 1 end
+	db[who][where] = { tonumber (when), what }
+end
+
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+local db_file, e = io.open (db_filename, "a+")
+if not db_file then error ("cannot open database: " .. e, 0) end
+
+function db_store (who, where, when, what)
+	db_file:write (string.format
+		(":%s %s %s %s :%s\n", who, "PRIVMSG", where, when, what))
+end
+
+function db_compact ()
+	db_file:close ()
+
+	-- Unfortunately, default Lua doesn't have anything like mkstemp()
+	local db_tmpname = db_filename .. "." .. os.time ()
+	db_file, e = io.open (db_tmpname, "a+")
+	if not db_file then error ("cannot save database: " .. e, 0) end
+
+	for who, places in pairs (db) do
+		for where, data in pairs (places) do
+			db_store (who, where, data[1], data[2])
+		end
+	end
+	db_file:flush ()
+
+	local ok, e = os.rename (db_tmpname, db_filename)
+	if not ok then error ("cannot save database: " .. e, 0) end
+	db_garbage = 0
+end
+
+for line in db_file:lines () do
+	local msg = parse (line)
+	remember (msg.prefix, table.unpack (msg.params))
+end
+
+-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+function seen (who, where, args)
+	local respond = function (...)
+		local privmsg = function (target, ...)
+			io.write ("PRIVMSG ", target, " :", table.concat { ... }, "\r\n")
+		end
+		if where:match ("^[#&!+]") then
+			privmsg (where, who, ": ", ...)
+		else
+			privmsg (who, ...)
+		end
+	end
+
+	local whom, e, garbage = args:match ("^(%S+)()%s*(.*)")
+	if not whom or #garbage ~= 0 then
+		return respond ("usage: <name>")
+	elseif who:lower () == whom:lower () then
+		return respond ("I can see you right now.")
+	end
+
+	local top = {}
+	-- That is, * acts like a wildcard, otherwise everything is escaped
+	local pattern = "^" .. whom:gsub ("[%^%$%(%)%%%.%[%]%+%-%?]", "%%%0")
+		:gsub ("%*", ".*"):lower () .. "$"
+	for name, places in pairs (db) do
+		if places[where] and name:lower ():match (pattern) then
+			local when, what = table.unpack (places[where])
+			table.insert (top, { name = name, when = when, what = what })
+		end
+	end
+	if #top == 0 then
+		return respond ("I have not seen \x02" .. whom .. "\x02 here.")
+	end
+
+	-- Get all matching nicknames ordered from the most recently active
+	-- and make the list case insensitive (remove older duplicates)
+	table.sort (top, function (a, b) return a.when > b.when end)
+	for i = #top, 2, -1 do
+		if top[i - 1].name:lower () == top[i].name:lower () then
+			table.remove (top, i)
+		end
+	end
+
+	-- Hopefully the formatting mess will disrupt highlights in clients
+	for i = 1, math.min (#top, 3) do
+		local name = top[i].name:gsub ("^.", "%0\x02\x02")
+		respond (string.format ("\x02%s\x02 -> %s -> %s",
+			name, os.date ("%c", top[i].when), top[i].what))
+	end
+end
+
+function handle (msg)
+	local who = msg.prefix:match ("^[^!@]*")
+	local where, what = table.unpack (msg.params)
+	local when = os.time ()
+
+	local what_log = what:gsub ("^\x01ACTION", "*"):gsub ("\x01$", "")
+	remember (who, where, when, what_log)
+	db_store (who, where, when, what_log)
+
+	-- Comment out to reduce both disk load and reliability
+	db_file:flush ()
+
+	if db_garbage > 5000 then db_compact () end
+
+	if what:sub (1, #prefix) == prefix then
+		local command = what:sub (#prefix + 1)
+		local name, e = command:match ("^(%S+)%s*()")
+		if name == 'seen' then seen (who, where, command:sub (e)) end
+	end
+end
+
+for line in io.lines () do
+	local msg = parse (line)
+	if msg.command == "PRIVMSG" then handle (msg) end
+end

plugins/xB/seen-import-xC.pl

@@ -0,0 +1,39 @@
+#!/usr/bin/env perl
+# Creates a database for the "seen" plugin from logs for xC.
+# The results may not be completely accurate but are good for jumpstarting.
+# Usage: ./seen-import-xC.pl LOG-FILE... > seen.db
+
+use strict;
+use warnings;
+use File::Basename;
+use Time::Piece;
+
+my $db = {};
+for (@ARGV) {
+	my $where = (basename($_) =~ /\.(.*).log/)[0];
+	unless ($where) {
+		print STDERR "Invalid filename: $_\n";
+		next;
+	}
+
+	open my $fh, '<', $_ or die "Failed to open log file: $!";
+	while (<$fh>) {
+		my ($when, $who, $who_action, $what) =
+			/^(.{19}) (?:<[~&@%+]*(.*?)>| \*  (\S+)) (.*)/;
+		next unless $when;
+
+		if ($who_action) {
+			$who = $who_action;
+			$what = "* $what";
+		}
+		$db->{$who}->{$where} =
+			[Time::Piece->strptime($when, "%Y-%m-%d %T")->epoch, $what];
+	}
+}
+
+while (my ($who, $places) = each %$db) {
+	while (my ($where, $data) = each %$places) {
+		my ($when, $what) = @$data;
+		print ":$who PRIVMSG $where $when :$what\n";
+	}
+}

plugins/xB/youtube

@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
 #
-# ZyklonB YouTube plugin, displaying info about YouTube links
+# xB YouTube plugin, displaying info about YouTube links
 #
-# Copyright 2014 - 2015, Přemysl Janouch <p.janouch@gmail.com>
+# Copyright 2014 - 2015, Přemysl Eric Janouch <p@janouch.name>
 # See the file LICENSE for licensing information.
 #
 
@@ -27,12 +27,12 @@ class Plugin:
 		return (nick, user, host, command, args)
 
 	def get_config (self, key):
-		print ("ZYKLONB get_config :%s" % key)
+		print ("XB get_config :%s" % key)
 		(_, _, _, _, args) = self.parse (sys.stdin.readline ())
 		return args[0]
 
 	def bot_print (self, what):
-		print ('ZYKLONB print :%s' % what)
+		print ('XB print :%s' % what)
 
 class YouTube (Plugin):
 	re_videos = [re.compile (x) for x in [
@@ -98,7 +98,7 @@ class YouTube (Plugin):
 		if self.youtube_api_key == "":
 			self.bot_print ("youtube: missing `youtube_api_key'")
 
-		print ("ZYKLONB register")
+		print ("XB register")
 
 		for line in sys.stdin:
 			self.process_line (line)

plugins/xC/auto-rejoin.lua

@@ -0,0 +1,48 @@
+--
+-- auto-rejoin.lua: join back automatically when someone kicks you
+--
+-- Copyright (c) 2016, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+local timeout
+xC.setup_config {
+	timeout = {
+		type = "integer",
+		comment = "auto rejoin timeout",
+		default = "0",
+
+		on_change = function (v)
+			timeout = v
+		end,
+		validate = function (v)
+			if v < 0 then error ("timeout must not be negative", 0) end
+		end,
+	},
+}
+
+async, await = xC.async, coroutine.yield
+xC.hook_irc (function (hook, server, line)
+	local msg = xC.parse (line)
+	if msg.command ~= "KICK" then return line end
+
+	local who = msg.prefix:match ("^[^!]*")
+	local channel, whom = table.unpack (msg.params)
+	if who ~= whom and whom == server.user.nickname then
+		async.go (function ()
+			await (async.timer_ms (timeout * 1000))
+			server:send ("JOIN " .. channel)
+		end)
+	end
+	return line
+end)

plugins/xC/censor.lua

@@ -0,0 +1,90 @@
+--
+-- censor.lua: black out certain users' messages
+--
+-- Copyright (c) 2016 - 2021, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+local to_pattern = function (mask)
+	if not mask:match ("!") then mask = mask .. "!*" end
+	if not mask:match ("@") then mask = mask .. "@*" end
+
+	-- That is, * acts like a wildcard, otherwise everything is escaped
+	return "^" .. mask:gsub ("[%^%$%(%)%%%.%[%]%+%-%?]", "%%%0")
+		:gsub ("%*", ".*") .. "$"
+end
+
+local patterns = {}
+local read_masks = function (v)
+	patterns = {}
+	local add = function (who, where)
+		local channels = patterns[who] or {}
+		table.insert (channels, where)
+		patterns[who] = channels
+	end
+	for item in v:lower ():gmatch ("[^,]+") do
+		local who, where = item:match ("^([^/]+)/*(.*)")
+		if who then add (to_pattern (who), where == "" or where) end
+	end
+end
+
+local quote
+xC.setup_config {
+	masks = {
+		type = "string_array",
+		default = "\"\"",
+		comment = "user masks (optionally \"/#channel\") to censor",
+		on_change = read_masks
+	},
+	quote = {
+		type = "string",
+		default = "\"\\x0301,01\"",
+		comment = "formatting prefix for censored messages",
+		on_change = function (v) quote = v end
+	},
+}
+
+local decolor = function (text)
+	local rebuilt, last = {""}, 1
+	for start in text:gmatch ('()\x03') do
+		table.insert (rebuilt, text:sub (last, start - 1))
+		local sub = text:sub (start + 1)
+		last = start + (sub:match ('^%d%d?,%d%d?()') or sub:match ('^%d?%d?()'))
+	end
+	return table.concat (rebuilt) .. text:sub (last)
+end
+
+local censor = function (line)
+	-- Taking a shortcut to avoid lengthy message reassembly
+	local start, text = line:match ("^(.- PRIVMSG .- :)(.*)$")
+	local ctcp, rest = text:match ("^(\x01%g+ )(.*)")
+	text = ctcp and ctcp .. quote .. decolor (rest) or quote .. decolor (text)
+	return start .. text
+end
+
+xC.hook_irc (function (hook, server, line)
+	local msg = xC.parse (line)
+	if msg.command ~= "PRIVMSG" then return line end
+
+	local channel = msg.params[1]:lower ()
+	for who, where in pairs (patterns) do
+		if msg.prefix:lower ():match (who) then
+			for _, x in pairs (where) do
+				if x == true or x == channel then
+					return censor (line)
+				end
+			end
+		end
+	end
+	return line
+end)

plugins/xC/fancy-prompt.lua

@@ -0,0 +1,105 @@
+--
+-- fancy-prompt.lua: the fancy multiline prompt you probably want
+--
+-- Copyright (c) 2016, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+-- Beware that it is a hack and only goes about 90% of the way, which is why
+-- this functionality is only available as a plugin in the first place
+-- (well, and also for customizability).
+--
+-- The biggest problem is that the way we work with Readline is incompatible
+-- with multiline prompts, and normal newlines just don't work.  This is being
+-- circumvented by using an overflowing single-line prompt with a specially
+-- crafted character in the rightmost column that prevents the bar's background
+-- from spilling all over the last line.
+--
+-- There is also a problem with C-r search rendering not clearing out the
+-- background but to really fix that mode, we'd have to fully reimplement it
+-- since its alternative prompt very often gets overriden by accident anyway.
+
+xC.hook_prompt (function (hook)
+	local current = xC.current_buffer
+	local chan = current.channel
+	local s = current.server
+
+	local bg_color = "255"
+	local current_n = 0
+	local active = ""
+	for i, buffer in ipairs (xC.buffers) do
+		if buffer == current then
+			current_n = i
+		elseif buffer.new_messages_count ~= buffer.new_unimportant_count then
+			if active ~= "" then active = active .. "," end
+			if buffer.highlighted then
+				active = active .. "!"
+				bg_color = "224"
+			end
+			active = active .. i
+		end
+	end
+	if active ~= "" then active = "(" .. active .. ")" end
+	local x = current_n .. ":" .. current.name
+	if chan and chan.users_len ~= 0 then
+		local params = ""
+		for mode, param in pairs (chan.param_modes) do
+			params = params .. " +" .. mode .. " " .. param
+		end
+		local modes = chan.no_param_modes .. params:sub (3)
+		if modes ~= "" then x = x .. "(+" .. modes .. ")" end
+		x = x .. "{" .. chan.users_len .. "}"
+	end
+	if current.hide_unimportant then x = x .. "<H>" end
+
+	local lines, cols = xC.get_screen_size ()
+	x = x .. " " .. active .. string.rep (" ", cols)
+
+	-- Readline 7.0.003 seems to be broken and completely corrupts the prompt.
+	-- However 8.0.004 seems to be fine with these, as is libedit 20191231-3.1.
+	--x = x:gsub("[\128-\255]", "?")
+
+	-- Cut off extra characters and apply formatting, including the hack.
+	-- FIXME: this doesn't count with full-width or zero-width characters.
+	--   We might want to export wcwidth() above term_from_utf8 somehow.
+	local overflow = utf8.offset (x, cols - 1)
+	if overflow then x = x:sub (1, overflow) end
+	x = "\x01\x1b[0;4;1;38;5;16m\x1b[48;5;" .. bg_color .. "m\x02" ..
+		x ..  "\x01\x1b[0;4;1;7;38;5;" .. bg_color .. "m\x02 \x01\x1b[0;1m\x02"
+
+	local user_prefix = function (chan, user)
+		for i, chan_user in ipairs (chan.users) do
+			if chan_user.user == user then return chan_user.prefixes end
+		end
+		return ""
+	end
+	if s then
+		x = x .. "["
+		local state = s.state
+		if state == "disconnected" or state == "connecting" then
+			x = x .. "(" .. state .. ")"
+		elseif state ~= "registered" then
+			x = x .. "(unregistered)"
+		else
+			local user, modes = s.user, s.user_mode
+			if chan then x = x .. user_prefix (chan, user) end
+			x = x .. user.nickname
+			if modes ~= "" then x = x .. "(" .. modes .. ")" end
+		end
+		x = x .. "] "
+	else
+		-- There needs to be at least one character so that the cursor
+		-- doesn't get damaged by our hack in that last column
+		x = x .. "> "
+	end
+	return x
+end)

plugins/xC/last-fm.lua

@@ -5,11 +5,10 @@
 --
 -- I call this style closure-oriented programming
 --
--- Copyright (c) 2016, Přemysl Janouch <p.janouch@gmail.com>
+-- Copyright (c) 2016, Přemysl Eric Janouch <p@janouch.name>
 --
 -- Permission to use, copy, modify, and/or distribute this software for any
--- purpose with or without fee is hereby granted, provided that the above
+-- purpose with or without fee is hereby granted.
--- copyright notice and this permission notice appear in all copies.
 --
 -- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 -- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
@@ -24,7 +23,7 @@ local cjson = require "cjson"
 
 -- Setup configuration to load last.fm API credentials from
 local user, api_key
-degesch.setup_config {
+xC.setup_config {
 	user    = {
 		type = "string",
 		comment = "last.fm username",
@@ -118,24 +117,23 @@ end
 local running
 
 -- Initiate a connection to last.fm servers
+async, await = xC.async, coroutine.yield
 local make_request = function (buffer, action)
 	if not user or not api_key then
 		report_error (buffer, "configuration is incomplete")
 		return
 	end
 
-	if running then running.abort () end
+	if running then running:cancel () end
-
+	running = async.go (function ()
-	running = degesch.connect ("ws.audioscrobbler.com", 80, {
+		local c, host, e = await (async.dial ("ws.audioscrobbler.com", 80))
-		on_success = function (c, host)
+		if e then
-			on_connected (buffer, c, host, action)
-			running = nil
-		end,
-		on_error   = function (e)
 			report_error (buffer, e)
-			running = nil
+		else
+			on_connected (buffer, c, host, action)
 		end
-	})
+		running = nil
+	end)
 end
 
 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -161,7 +159,7 @@ local send_song = function (buffer)
 end
 
 -- Hook input to simulate new commands
-degesch.hook_input (function (hook, buffer, input)
+xC.hook_input (function (hook, buffer, input)
 	if input == "/np" then
 		make_request (buffer, function (np)
 			now_playing = np

plugins/xC/ping-timeout.lua

@@ -1,11 +1,10 @@
 --
 -- ping-timeout.lua: ping timeout readability enhancement plugin
 --
--- Copyright (c) 2015, Přemysl Janouch <p.janouch@gmail.com>
+-- Copyright (c) 2015 - 2016, Přemysl Eric Janouch <p@janouch.name>
 --
 -- Permission to use, copy, modify, and/or distribute this software for any
--- purpose with or without fee is hereby granted, provided that the above
+-- purpose with or without fee is hereby granted.
--- copyright notice and this permission notice appear in all copies.
 --
 -- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 -- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
@@ -16,10 +15,10 @@
 -- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 --
 
-degesch.hook_irc (function (hook, server, line)
+xC.hook_irc (function (hook, server, line)
-	local start, timeout =
+	local msg = xC.parse (line)
-		line:match ("^(:[^ ]* QUIT :Ping timeout:) (%d+) seconds$")
+	local start, timeout = line:match ("^(.* :Ping timeout:) (%d+) seconds$")
-	if not start then
+	if msg.command ~= "QUIT" or not start then
 		return line
 	end
 

plugins/xC/prime.lua

@@ -0,0 +1,68 @@
+--
+-- prime.lua: highlight prime numbers in messages
+--
+-- Copyright (c) 2020, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+local smallest, highlight = 0, "\x1f"
+xC.setup_config {
+	smallest = {
+		type = "integer",
+		default = "0",
+		comment = "smallest number to scan for primality",
+		on_change = function (v) smallest = math.max (v, 2) end
+	},
+	highlight = {
+		type = "string",
+		default = "\"\\x1f\"",
+		comment = "the attribute to use for highlights",
+		on_change = function (v) highlight = v end
+	},
+}
+
+-- The prime test is actually very fast, so there is no DoS concern
+local do_intercolour = function (text)
+	return tostring (text:gsub ("%f[%w_]%d+", function (n)
+		if tonumber (n) < smallest then return nil end
+		for i = 2, n ^ (1 / 2) do if (n % i) == 0 then return nil end end
+		return highlight .. n .. highlight
+	end))
+end
+
+local do_interlink = function (text)
+	local rebuilt, last = {""}, 1
+	for start in text:gmatch ('()\x03') do
+		table.insert (rebuilt, do_intercolour (text:sub (last, start - 1)))
+		local sub = text:sub (start + 1)
+		last = start + (sub:match ('^%d%d?,%d%d?()') or sub:match ('^%d?%d?()'))
+		table.insert (rebuilt, text:sub (start, last - 1))
+	end
+	return table.concat (rebuilt) .. do_intercolour (text:sub (last))
+end
+
+local do_message = function (text)
+	local rebuilt, last = {""}, 1
+	for run, link, endpos in text:gmatch ('(.-)(%f[%g]https?://%g+)()') do
+		last = endpos
+		table.insert (rebuilt, do_interlink (run) .. link)
+	end
+	return table.concat (rebuilt) .. do_interlink (text:sub (last))
+end
+
+-- XXX: sadly it won't typically highlight primes in our own messages,
+-- unless IRCv3 echo-message is on
+xC.hook_irc (function (hook, server, line)
+	local start, message = line:match ("^(.- PRIVMSG .- :)(.*)$")
+	return message and start .. do_message (message) or line
+end)

plugins/xC/slack.lua

@@ -0,0 +1,147 @@
+--
+-- slack.lua: try to fix up UX when using the Slack IRC gateway
+--
+-- Copyright (c) 2017, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+local servers = {}
+local read_servers = function (v)
+	servers = {}
+	for name in v:lower ():gmatch "[^,]+" do
+		servers[name] = true
+	end
+end
+
+-- This is a reverse list of Slack's automatic emoji, noseless forms
+local unemojify, emoji, emoji_default = false, {}, {
+	heart                        = "<3",
+	broken_heart                 = "</3",
+	sunglasses                   = "8)",
+	anguished                    = "D:",
+	cry                          = ":'(",
+	monkey_face                  = ":o)",
+	kiss                         = ":*",
+	smiley                       = "=)",
+	smile                        = ":D",
+	wink                         = ";)",
+	laughing                     = ":>",
+	neutral_face                 = ":|",
+	open_mouth                   = ":o",
+	angry                        = ">:(",
+	slightly_smiling_face        = ":)",
+	disappointed                 = ":(",
+	confused                     = ":/",
+	stuck_out_tongue             = ":p",
+	stuck_out_tongue_winking_eye = ";p",
+}
+local load_emoji = function (extra)
+	emoji = {}
+	for k, v in pairs (emoji_default) do emoji[k] = v end
+	for k, v in extra:gmatch "([^,]+) ([^,]+)" do emoji[k] = v end
+end
+
+xC.setup_config {
+	servers = {
+		type = "string_array",
+		default = "\"\"",
+		comment = "list of server names that are Slack IRC gateways",
+		on_change = read_servers
+	},
+	unemojify = {
+		type = "boolean",
+		default = "true",
+		comment = "convert emoji to normal ASCII emoticons",
+		on_change = function (v) unemojify = v end
+	},
+	extra_emoji = {
+		type = "string_array",
+		default = "\"grinning :)),joy :'),innocent o:),persevere >_<\"",
+		comment = "overrides or extra emoji for unemojify",
+		on_change = function (v) load_emoji (v) end
+	}
+}
+
+-- We can handle external messages about what we've supposedly sent just fine,
+-- so let's get rid of that "[username] some message sent from the web UI" crap
+xC.hook_irc (function (hook, server, line)
+	local msg, us = xC.parse (line), server.user
+	if not servers[server.name] or msg.command ~= "PRIVMSG" or not us
+		or msg.params[1]:lower () ~= us.nickname:lower () then return line end
+
+	-- Taking a shortcut to avoid lengthy message reassembly
+	local quoted_nick = us.nickname:gsub ("[%^%$%(%)%%%.%[%]%*%+%-%?]", "%%%0")
+	local text = line:match ("^.- PRIVMSG .- :%[" .. quoted_nick .. "%] (.*)$")
+	if not text then return line end
+	return ":" .. us.nickname .. "!" .. server.irc_user_host .. " PRIVMSG "
+		.. msg.prefix:match "^[^!@]*" .. " :" .. text
+end)
+
+-- Unfuck emoji and :nick!nick@irc.tinyspeck.com MODE #channel +v nick : active
+xC.hook_irc (function (hook, server, line)
+	if not servers[server.name] then return line end
+	if unemojify then
+		local start, text = line:match ("^(.- PRIVMSG .- :)(.*)$")
+		if start then return start .. text:gsub (":([a-z_]+):", function (name)
+			if emoji[name] then return emoji[name] end
+			return ":" .. name .. ":"
+		end) end
+	end
+	return line:gsub ("^(:%S+ MODE .+) : .*", "%1")
+end)
+
+-- The gateway simply ignores the NAMES command altogether
+xC.hook_input (function (hook, buffer, input)
+	if not buffer.channel or not servers[buffer.server.name]
+		or not input:match "^/names%s*$" then return input end
+
+	local users = buffer.channel.users
+	table.sort (users, function (a, b)
+		if a.prefixes > b.prefixes then return true end
+		if a.prefixes < b.prefixes then return false end
+		return a.user.nickname < b.user.nickname
+	end)
+
+	local names = "Users on " .. buffer.channel.name .. ":"
+	for i, chan_user in ipairs (users) do
+		names = names .. " " .. chan_user.prefixes .. chan_user.user.nickname
+	end
+	buffer:log (names)
+end)
+
+xC.hook_completion (function (hook, data, word)
+	local chan = xC.current_buffer.channel
+	local server = xC.current_buffer.server
+	if not chan or not servers[server.name] then return end
+
+	-- In /commands there is typically no desire at all to add the at sign
+	if data.location == 1 and data.words[1]:match "^/" then return end
+
+	-- Handle both when the at sign is already there and when it is not
+	local needle = word:gsub ("^@", ""):lower ()
+
+	local t = {}
+	local try = function (name)
+		if data.location == 0 then name = name .. ":" end
+		if name:sub (1, #needle):lower () == needle then
+			table.insert (t, "@" .. name)
+		end
+	end
+	for _, chan_user in ipairs (chan.users) do
+		try (chan_user.user.nickname)
+	end
+	for _, special in ipairs { "channel", "here" } do
+		try (special)
+	end
+	return t
+end)

plugins/xC/thin-cursor.lua

@@ -0,0 +1,27 @@
+--
+-- thin-cursor.lua: set a thin cursor
+--
+-- Copyright (c) 2016, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+-- If tmux doesn't work, add the following to its configuration:
+--   set -as terminal-overrides ',*:Ss=\E[%p1%d q:Se=\E[2 q'
+-- Change the "2" as per http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+
+local out = io.output ()
+out:write ("\x1b[6 q"):flush ()
+
+-- By registering a global variable, we get notified about plugin unload
+x = setmetatable ({}, { __gc = function ()
+	out:write ("\x1b[2 q"):flush ()
+end })

plugins/xC/utm-filter.lua

@@ -1,11 +1,10 @@
 --
 -- utm-filter.lua: filter out Google Analytics bullshit from URLs
 --
--- Copyright (c) 2015, Přemysl Janouch <p.janouch@gmail.com>
+-- Copyright (c) 2015, Přemysl Eric Janouch <p@janouch.name>
 --
 -- Permission to use, copy, modify, and/or distribute this software for any
--- purpose with or without fee is hereby granted, provided that the above
+-- purpose with or without fee is hereby granted.
--- copyright notice and this permission notice appear in all copies.
 --
 -- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 -- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
@@ -53,11 +52,11 @@ local do_text = function (text)
 	return text:gsub ('%f[%g]https?://%g+', do_single_url)
 end
 
-degesch.hook_irc (function (hook, server, line)
+xC.hook_irc (function (hook, server, line)
 	local start, message = line:match ("^(.* :)(.*)$")
 	return message and start .. do_text (message) or line
 end)
 
-degesch.hook_input (function (hook, buffer, input)
+xC.hook_input (function (hook, buffer, input)
 	return do_text (input)
 end)

test

@@ -1,14 +1,14 @@
 #!/usr/bin/expect -f
-# Very basic end-to-end testing for Travis CI
+# Very basic end-to-end testing for CI
 
 # Run the daemon to test against
-system ./kike --write-default-cfg
+system ./xD --write-default-cfg
-spawn ./kike -d
+spawn ./xD -d
 
 # 10 seconds is a bit too much
 set timeout 5
 
-spawn ./degesch
+spawn ./xC
 
 # Fuck this Tcl shit, I want the exit code
 expect_after {

test-nick-colors

@@ -0,0 +1,26 @@
+#!/bin/sh
+# Check whether the terminal colours filtered by our algorithm are legible
+export example=$(
+	tcc "-run -lm" - <<-END
+	#include <stddef.h>
+	#include <stdio.h>
+	#include <math.h>
+
+	#define N_ELEMENTS(a) (sizeof (a) / sizeof ((a)[0]))
+
+	$(perl -0777 -ne 'print $& if /^.*?\nfilter_color(?s:.*?)^}$/m' \
+		"$(dirname "$0")"/xC.c)
+
+	void main () {
+		size_t len = 0;
+		int *table = filter_color_cube_for_acceptable_nick_colors (&len);
+		for (size_t i = 0; i < len; i++)
+			printf ("<@\\x1b[38;5;%dmIRCuser\\x1b[m> I'm typing!\n", table[i]);
+	}
+	END
+)
+
+# Both should give acceptable results,
+# which results in a bad compromise that the main author himself needs
+xterm -bg black -fg white -e 'echo $example; cat' &
+xterm -bg white -fg black -e 'echo $example; cat' &

test-static

@@ -0,0 +1,14 @@
+#!/bin/sh
+# We don't use printf's percent notation with our custom logging mechanism,
+# so the compiler cannot check it for us like it usually does
+perl -n0777 - "$(dirname "$0")"/xC.c <<-'END'
+	while (/\blog_[^ ]+\s*\([^"()]*"[^"]*%[^%][^"]*"/gm) {
+		my ($p, $m) = ($`, $&);
+		printf "$ARGV:%d: suspicious log format string: %s...\n",
+			(1 + $p =~ tr/\n//), ($m =~ s/\s+/ /rg);
+		$status = 1;
+	}
+	END {
+		exit $status;
+	}
+END

xB.adoc

@@ -0,0 +1,104 @@
+xB(1)
+=====
+:doctype: manpage
+:manmanual: uirc3 Manual
+:mansource: uirc3 {release-version}
+
+Name
+----
+xB - modular IRC bot
+
+Synopsis
+--------
+*xB* [_OPTION_]...
+
+Description
+-----------
+*xB* is a modular IRC bot with a programming language-agnostic plugin
+architecture based on co-processes.
+
+Options
+-------
+*-d*, *--debug*::
+	Print more information to help debug various issues.
+
+*-h*, *--help*::
+	Display a help message and exit.
+
+*-V*, *--version*::
+	Output version information and exit.
+
+*--write-default-cfg*[**=**__PATH__]::
+	Write a configuration file with defaults, show its path and exit.
++
+The file will be appropriately commented.
+
+Commands
+--------
+The bot accepts the following commands when they either appear quoted by the
+*prefix* string on a channel or unquoted as a private message sent directly
+to the bot, on the condition that the sending user matches the *admin*
+regular expression or that it is left unset:
+
+*quote* [_message_]::
+	Forwards the message to the IRC server as-is.
+*quit* [_reason_]::
+	Quits the IRC server, with an optional reason string.
+*status*::
+	Sends back a report about its state and all loaded plugins.
+*load* _plugin_[, _plugin_]...::
+	Tries to load the given plugins.
+*unload* _plugin_[, _plugin_]...::
+	Tries to unload the given plugins.
+*reload* _plugin_[, _plugin_]...::
+	The same as *unload* immediately followed by *load*.
+
+Plugins
+-------
+Plugins communicate with the bot over their standard input and output streams
+using the IRC protocol.  (Caveat: the standard C library doesn't automatically
+flush FILE streams for pipes on newlines.)  A special *XB* command is introduced
+for RPC, with the following subcommands:
+
+*XB get_config* _key_::
+	Request the value of the given configuration option.  If no such option
+	exists, the value will be empty.  The response will be delivered in
+	the following format:
++
+```
+XB :value
+```
++
+This is particularly useful for retrieving the *prefix* string.
+
+*XB print* _message_::
+	Make the bot print the _message_ on its standard output.
+
+*XB register*::
+	Once a plugin issues this command, it will start receiving all of the bot's
+	incoming IRC traffic, which includes data from the initialization period.
+
+All other commands will be forwarded directly to the IRC server.
+
+Files
+-----
+*xB* follows the XDG Base Directory Specification.
+
+_~/.config/xB/xB.conf_::
+	The bot's configuration file.  Use the *--write-default-cfg* option
+	to create a new one for editing.
+
+_~/.local/share/xB/_::
+	The initial working directory for plugins, in which they may create private
+	databases or other files as needed.
+
+_~/.local/share/xB/plugins/_::
+_/usr/local/share/xB/plugins/_::
+_/usr/share/xB/plugins/_::
+	Plugins are searched for in these directories, in order, unless
+	the *plugin_dir* configuration option overrides this.
+
+Reporting bugs
+--------------
+Use https://git.janouch.name/p/uirc3 to report bugs, request features,
+or submit pull requests.

xB.c

@@ -1,11 +1,10 @@
 /*
- * zyklonb.c: the experimental IRC bot
+ * xB.c: a modular IRC bot
  *
- * Copyright (c) 2014 - 2016, Přemysl Janouch <p.janouch@gmail.com>
+ * Copyright (c) 2014 - 2020, Přemysl Eric Janouch <p@janouch.name>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
+ * purpose with or without fee is hereby granted.
- * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
@@ -18,8 +17,7 @@
  */
 
 #include "config.h"
-#define PROGRAM_NAME "ZyklonB"
+#define PROGRAM_NAME "xB"
-#define PLUGIN_DIR ZYKLONB_PLUGIN_DIR
 
 #include "common.c"
 
@@ -27,9 +25,9 @@
 
 static struct simple_config_item g_config_table[] =
 {
-	{ "nickname",        "ZyklonB",         "IRC nickname"                   },
+	{ "nickname",        "xB",              "IRC nickname"                   },
 	{ "username",        "bot",             "IRC user name"                  },
-	{ "realname",        "ZyklonB IRC bot", "IRC real name/e-mail"           },
+	{ "realname",        "xB IRC bot",      "IRC real name/e-mail"           },
 
 	{ "irc_host",        NULL,              "Address of the IRC server"      },
 	{ "irc_port",        "6667",            "Port of the IRC server"         },
@@ -50,7 +48,7 @@ static struct simple_config_item g_config_table[] =
 	{ "prefix",          ":",               "The prefix for bot commands"    },
 	{ "admin",           NULL,              "Host mask for administrators"   },
 	{ "plugins",         NULL,              "The plugins to load on startup" },
-	{ "plugin_dir",      PLUGIN_DIR,        "Where to search for plugins"    },
+	{ "plugin_dir",      NULL,              "Plugin search path override"    },
 	{ "recover",         "on",              "Whether to re-launch on crash"  },
 
 	{ NULL,              NULL,              NULL                             }
@@ -83,22 +81,22 @@ struct plugin
 	struct str write_buffer;            ///< Output yet to be sent out
 };
 
-static void
+static struct plugin *
-plugin_init (struct plugin *self)
+plugin_new (void)
 {
-	memset (self, 0, sizeof *self);
+	struct plugin *self = xcalloc (1, sizeof *self);
-
 	self->pid = -1;
-	str_init (&self->queued_output);
+	self->queued_output = str_make ();
 
 	self->read_fd = -1;
-	str_init (&self->read_buffer);
+	self->read_buffer = str_make ();
 	self->write_fd = -1;
-	str_init (&self->write_buffer);
+	self->write_buffer = str_make ();
+	return self;
 }
 
 static void
-plugin_free (struct plugin *self)
+plugin_destroy (struct plugin *self)
 {
 	soft_assert (self->pid == -1);
 	free (self->name);
@@ -113,6 +111,8 @@ plugin_free (struct plugin *self)
 
 	if (!self->initialized)
 		str_free (&self->queued_output);
+
+	free (self);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -152,34 +152,33 @@ static void on_irc_reconnect_timeout (void *user_data);
 static void
 bot_context_init (struct bot_context *self)
 {
-	str_map_init (&self->config);
+	self->config = str_map_make (free);
-	self->config.free = free;
 	simple_config_load_defaults (&self->config, g_config_table);
 	self->admin_re = NULL;
 
 	self->irc_fd = -1;
-	str_init (&self->read_buffer);
+	self->read_buffer = str_make ();
 	self->irc_registered = false;
 
 	self->ssl = NULL;
 	self->ssl_ctx = NULL;
 
 	self->plugins = NULL;
-	str_map_init (&self->plugins_by_name);
+	self->plugins_by_name = str_map_make (NULL);
 
 	poller_init (&self->poller);
 	self->quitting = false;
 	self->polling = false;
 
-	poller_timer_init (&self->timeout_tmr, &self->poller);
+	self->timeout_tmr = poller_timer_make (&self->poller);
 	self->timeout_tmr.dispatcher = on_irc_timeout;
 	self->timeout_tmr.user_data = self;
 
-	poller_timer_init (&self->ping_tmr, &self->poller);
+	self->ping_tmr = poller_timer_make (&self->poller);
 	self->ping_tmr.dispatcher = on_irc_ping_timeout;
 	self->ping_tmr.user_data = self;
 
-	poller_timer_init (&self->reconnect_tmr, &self->poller);
+	self->reconnect_tmr = poller_timer_make (&self->poller);
 	self->reconnect_tmr.dispatcher = on_irc_reconnect_timeout;
 	self->reconnect_tmr.user_data = self;
 }
@@ -193,18 +192,13 @@ bot_context_free (struct bot_context *self)
 	str_free (&self->read_buffer);
 
 	// TODO: terminate the plugins properly before this is called
-	struct plugin *link, *tmp;
+	LIST_FOR_EACH (struct plugin, link, self->plugins)
-	for (link = self->plugins; link; link = tmp)
+		plugin_destroy (link);
-	{
-		tmp = link->next;
-		plugin_free (link);
-		free (link);
-	}
 
 	if (self->irc_fd != -1)
 	{
-		xclose (self->irc_fd);
 		poller_fd_reset (&self->irc_event);
+		xclose (self->irc_fd);
 	}
 	if (self->ssl)
 		SSL_free (self->ssl);
@@ -272,8 +266,7 @@ irc_send (struct bot_context *ctx, const char *format, ...)
 		return false;
 
 	va_start (ap, format);
-	struct str str;
+	struct str str = str_make ();
-	str_init (&str);
 	str_append_vprintf (&str, format, ap);
 	str_append (&str, "\r\n");
 	va_end (ap);
@@ -286,7 +279,7 @@ irc_send (struct bot_context *ctx, const char *format, ...)
 		if (SSL_write (ctx->ssl, str.str, str.len) != (int) str.len)
 		{
 			print_debug ("%s: %s: %s", __func__, "SSL_write",
-				ERR_error_string (ERR_get_error (), NULL));
+				xerr_describe_error ());
 			result = false;
 		}
 	}
@@ -310,7 +303,7 @@ irc_get_boolean_from_config
 	if (set_boolean_if_valid (value, str))
 		return true;
 
-	FAIL ("invalid configuration value for `%s'", name);
+	return error_set (e, "invalid configuration value for `%s'", name);
 }
 
 static bool
@@ -324,13 +317,15 @@ irc_initialize_ca_set (SSL_CTX *ssl_ctx, const char *file, const char *path,
 		if (SSL_CTX_load_verify_locations (ssl_ctx, file, path))
 			return true;
 
-		FAIL ("%s: %s", "failed to set locations for the CA certificate bundle",
+		return error_set (e, "%s: %s",
-			ERR_reason_error_string (ERR_get_error ()));
+			"failed to set locations for the CA certificate bundle",
+			xerr_describe_error ());
 	}
 
 	if (!SSL_CTX_set_default_verify_paths (ssl_ctx))
-		FAIL ("%s: %s", "couldn't load the default CA certificate bundle",
+		return error_set (e, "%s: %s",
-			ERR_reason_error_string (ERR_get_error ()));
+			"couldn't load the default CA certificate bundle",
+			xerr_describe_error ());
 	return true;
 }
 
@@ -411,7 +406,7 @@ irc_initialize_tls (struct bot_context *ctx, struct error **e)
 		else if (!SSL_use_certificate_file (ctx->ssl, path, SSL_FILETYPE_PEM)
 			|| !SSL_use_PrivateKey_file (ctx->ssl, path, SSL_FILETYPE_PEM))
 			print_error ("%s: %s", "setting the TLS client certificate failed",
-				ERR_error_string (ERR_get_error (), NULL));
+				xerr_describe_error ());
 		free (path);
 	}
 
@@ -438,11 +433,9 @@ error_ssl_2:
 	SSL_CTX_free (ctx->ssl_ctx);
 	ctx->ssl_ctx = NULL;
 error_ssl_1:
-	// XXX: these error strings are really nasty; also there could be
-	//   multiple errors on the OpenSSL stack.
 	if (!error_info)
-		error_info = ERR_error_string (ERR_get_error (), NULL);
+		error_info = xerr_describe_error ();
-	FAIL ("%s: %s", "could not initialize TLS", error_info);
+	return error_set (e, "%s: %s", "could not initialize TLS", error_info);
 }
 
 static bool
@@ -455,7 +448,7 @@ irc_establish_connection (struct bot_context *ctx,
 
 	int err = getaddrinfo (host, port, &gai_hints, &gai_result);
 	if (err)
-		FAIL ("%s: %s: %s", "connection failed",
+		return error_set (e, "%s: %s: %s", "connection failed",
 			"getaddrinfo", gai_strerror (err));
 
 	int sockfd;
@@ -497,7 +490,7 @@ irc_establish_connection (struct bot_context *ctx,
 	freeaddrinfo (gai_result);
 
 	if (!gai_iter)
-		FAIL ("connection failed");
+		return error_set (e, "connection failed");
 
 	ctx->irc_fd = sockfd;
 	return true;
@@ -507,7 +500,7 @@ irc_establish_connection (struct bot_context *ctx,
 
 static int g_signal_pipe[2];            ///< A pipe used to signal... signals
 
-static struct str_vector
+static struct strv
 	g_original_argv,                    ///< Original program arguments
 	g_recovery_env;                     ///< Environment for re-exec recovery
 
@@ -682,8 +675,8 @@ recovery_handler (int signum, siginfo_t *info, void *context)
 static void
 prepare_recovery_environment (void)
 {
-	str_vector_init (&g_recovery_env);
+	g_recovery_env = strv_make ();
-	str_vector_add_vector (&g_recovery_env, environ);
+	strv_append_vector (&g_recovery_env, environ);
 
 	// Prepare a location within the environment where we will put the startup
 	// (or maybe rather restart) reason in case of an irrecoverable error.
@@ -700,7 +693,7 @@ prepare_recovery_environment (void)
 	else
 	{
 		g_startup_reason_location = g_recovery_env.vector + g_recovery_env.len;
-		str_vector_add (&g_recovery_env, "");
+		strv_append (&g_recovery_env, "");
 	}
 }
 
@@ -742,7 +735,7 @@ setup_recovery_handler (struct bot_context *ctx, struct error **e)
 // --- Plugins -----------------------------------------------------------------
 
 /// The name of the special IRC command for interprocess communication
-static const char *plugin_ipc_command = "ZYKLONB";
+static const char *plugin_ipc_command = "XB";
 
 static struct plugin *
 plugin_find_by_pid (struct bot_context *ctx, pid_t pid)
@@ -962,7 +955,7 @@ on_plugin_readable (const struct pollfd *fd, struct plugin *plugin)
 	struct str *buf = &plugin->read_buffer;
 	while (true)
 	{
-		str_ensure_space (buf, 512 + 1);
+		str_reserve (buf, 512 + 1);
 		ssize_t n_read = read (fd->fd, buf->str + buf->len,
 			buf->alloc - buf->len - 1);
 
@@ -1021,16 +1014,41 @@ is_valid_plugin_name (const char *name)
 	return true;
 }
 
+static char *
+plugin_resolve_relative_filename (const char *filename)
+{
+	struct strv paths = strv_make ();
+	get_xdg_data_dirs (&paths);
+	char *result = resolve_relative_filename_generic
+		(&paths, PROGRAM_NAME "/plugins/", filename);
+	strv_free (&paths);
+	return result;
+}
+
 static struct plugin *
 plugin_launch (struct bot_context *ctx, const char *name, struct error **e)
 {
+	char *path = NULL;
 	const char *plugin_dir = str_map_find (&ctx->config, "plugin_dir");
-	if (!plugin_dir)
+	if (plugin_dir)
-		FAIL ("plugin directory not set");
+	{
+		// resolve_relative_filename_generic() won't accept relative paths,
+		// so just keep the old behaviour and expect the file to exist.
+		// We could use resolve_filename() on "plugin_dir" with paths=getcwd().
+		path = xstrdup_printf ("%s/%s", plugin_dir, name);
+	}
+	else if (!(path = plugin_resolve_relative_filename (name)))
+	{
+		error_set (e, "plugin not found");
+		goto fail_0;
+	}
 
 	int stdin_pipe[2];
 	if (pipe (stdin_pipe) == -1)
-		FAIL ("%s: %s", "pipe", strerror (errno));
+	{
+		error_set (e, "%s: %s", "pipe", strerror (errno));
+		goto fail_0;
+	}
 
 	int stdout_pipe[2];
 	if (pipe (stdout_pipe) == -1)
@@ -1039,8 +1057,7 @@ plugin_launch (struct bot_context *ctx, const char *name, struct error **e)
 		goto fail_1;
 	}
 
-	struct str work_dir;
+	struct str work_dir = str_make ();
-	str_init (&work_dir);
 	get_xdg_home_dir (&work_dir, "XDG_DATA_HOME", ".local/share");
 	str_append_printf (&work_dir, "/%s", PROGRAM_NAME);
 
@@ -1080,7 +1097,7 @@ plugin_launch (struct bot_context *ctx, const char *name, struct error **e)
 		// Restore some of the signal handling
 		signal (SIGPIPE, SIG_DFL);
 
-		char *argv[] = { xstrdup_printf ("%s/%s", plugin_dir, name), NULL };
+		char *argv[] = { path, NULL };
 		execve (argv[0], argv, environ);
 
 		// We will collect the failure later via SIGCHLD
@@ -1090,12 +1107,12 @@ plugin_launch (struct bot_context *ctx, const char *name, struct error **e)
 	}
 
 	str_free (&work_dir);
+	free (path);
 
 	xclose (stdin_pipe[0]);
 	xclose (stdout_pipe[1]);
 
-	struct plugin *plugin = xmalloc (sizeof *plugin);
+	struct plugin *plugin = plugin_new ();
-	plugin_init (plugin);
 	plugin->ctx = ctx;
 	plugin->pid = pid;
 	plugin->name = xstrdup (name);
@@ -1110,6 +1127,8 @@ fail_2:
 fail_1:
 	xclose (stdin_pipe[0]);
 	xclose (stdin_pipe[1]);
+fail_0:
+	free (path);
 	return NULL;
 }
 
@@ -1117,9 +1136,9 @@ static bool
 plugin_load (struct bot_context *ctx, const char *name, struct error **e)
 {
 	if (!is_valid_plugin_name (name))
-		FAIL ("invalid plugin name");
+		return error_set (e, "invalid plugin name");
 	if (str_map_find (&ctx->plugins_by_name, name))
-		FAIL ("the plugin has already been loaded");
+		return error_set (e, "the plugin has already been loaded");
 
 	struct plugin *plugin;
 	if (!(plugin = plugin_launch (ctx, name, e)))
@@ -1128,11 +1147,11 @@ plugin_load (struct bot_context *ctx, const char *name, struct error **e)
 	set_blocking (plugin->read_fd, false);
 	set_blocking (plugin->write_fd, false);
 
-	poller_fd_init (&plugin->read_event, &ctx->poller, plugin->read_fd);
+	plugin->read_event = poller_fd_make (&ctx->poller, plugin->read_fd);
 	plugin->read_event.dispatcher = (poller_fd_fn) on_plugin_readable;
 	plugin->read_event.user_data = plugin;
 
-	poller_fd_init (&plugin->write_event, &ctx->poller, plugin->write_fd);
+	plugin->write_event = poller_fd_make (&ctx->poller, plugin->write_fd);
 	plugin->write_event.dispatcher = (poller_fd_fn) on_plugin_writable;
 	plugin->write_event.user_data = plugin;
 
@@ -1149,7 +1168,7 @@ plugin_unload (struct bot_context *ctx, const char *name, struct error **e)
 	struct plugin *plugin = str_map_find (&ctx->plugins_by_name, name);
 
 	if (!plugin)
-		FAIL ("no such plugin is loaded");
+		return error_set (e, "no such plugin is loaded");
 
 	plugin_zombify (plugin);
 
@@ -1165,10 +1184,8 @@ plugin_load_all_from_config (struct bot_context *ctx)
 	if (!plugin_list)
 		return;
 
-	struct str_vector plugins;
+	struct strv plugins = strv_make ();
-	str_vector_init (&plugins);
+	cstr_split (plugin_list, ",", true, &plugins);
-
-	cstr_split_ignore_empty (plugin_list, ',', &plugins);
 	for (size_t i = 0; i < plugins.len; i++)
 	{
 		char *name = cstr_strip_in_place (plugins.vector[i], " ");
@@ -1181,7 +1198,7 @@ plugin_load_all_from_config (struct bot_context *ctx)
 		}
 	}
 
-	str_vector_free (&plugins);
+	strv_free (&plugins);
 }
 
 // --- Main program ------------------------------------------------------------
@@ -1206,13 +1223,13 @@ parse_bot_command (const char *s, const char *command, const char **following)
 }
 
 static void
-split_bot_command_argument_list (const char *arguments, struct str_vector *out)
+split_bot_command_argument_list (const char *arguments, struct strv *out)
 {
-	cstr_split_ignore_empty (arguments, ',', out);
+	cstr_split (arguments, ",", true, out);
 	for (size_t i = 0; i < out->len; )
 	{
 		if (!*cstr_strip_in_place (out->vector[i], " \t"))
-			str_vector_remove (out, i);
+			strv_remove (out, i);
 		else
 			i++;
 	}
@@ -1248,10 +1265,8 @@ respond_to_user (struct bot_context *ctx, const struct irc_message *msg,
 	strncpy (nick, msg->prefix, sizeof nick - 1);
 	nick[sizeof nick - 1] = '\0';
 
-	struct str text;
 	va_list ap;
-
+	struct str text = str_make ();
-	str_init (&text);
 	va_start (ap, format);
 	str_append_vprintf (&text, format, ap);
 	va_end (ap);
@@ -1312,9 +1327,7 @@ process_plugin_reload (struct bot_context *ctx,
 static char *
 make_status_report (struct bot_context *ctx)
 {
-	struct str report;
+	struct str report = str_make ();
-	str_init (&report);
-
 	const char *reason = getenv (g_startup_reason_str);
 	if (!reason)
 		reason = "launched normally";
@@ -1359,8 +1372,7 @@ process_privmsg (struct bot_context *ctx, const struct irc_message *msg)
 		return;
 
 	const char *following;
-	struct str_vector list;
+	struct strv list = strv_make ();
-	str_vector_init (&list);
 
 	if (parse_bot_command (text, "quote", &following))
 		// This seems to replace tons of random stupid commands
@@ -1400,7 +1412,7 @@ process_privmsg (struct bot_context *ctx, const struct irc_message *msg)
 			process_plugin_unload (ctx, msg, list.vector[i]);
 	}
 
-	str_vector_free (&list);
+	strv_free (&list);
 }
 
 static void
@@ -1577,13 +1589,11 @@ on_irc_disconnected (struct bot_context *ctx)
 		ctx->ssl_ctx = NULL;
 	}
 
+	poller_fd_reset (&ctx->irc_event);
 	xclose (ctx->irc_fd);
 	ctx->irc_fd = -1;
 	ctx->irc_registered = false;
 
-	ctx->irc_event.closed = true;
-	poller_fd_reset (&ctx->irc_event);
-
 	// TODO: inform plugins about the disconnect event
 
 	// All of our timers have lost their meaning now
@@ -1638,7 +1648,7 @@ on_irc_readable (const struct pollfd *fd, struct bot_context *ctx)
 	bool disconnected = false;
 	while (true)
 	{
-		str_ensure_space (buf, 512);
+		str_reserve (buf, 512);
 		switch (fill_buffer (ctx, buf))
 		{
 		case IRC_READ_AGAIN:
@@ -1778,7 +1788,7 @@ irc_connect (struct bot_context *ctx, struct error **e)
 	// TODO: again, get rid of `struct error' in here.  The question is: how
 	//   do we tell our caller that he should not try to reconnect?
 	if (!irc_host)
-		FAIL ("no hostname specified in configuration");
+		return error_set (e, "no hostname specified in configuration");
 
 	bool use_tls;
 	if (!irc_get_boolean_from_config (ctx, "tls", &use_tls, e))
@@ -1799,7 +1809,7 @@ irc_connect (struct bot_context *ctx, struct error **e)
 	}
 	print_status ("connection established");
 
-	poller_fd_init (&ctx->irc_event, &ctx->poller, ctx->irc_fd);
+	ctx->irc_event = poller_fd_make (&ctx->poller, ctx->irc_fd);
 	ctx->irc_event.dispatcher = (poller_fd_fn) on_irc_readable;
 	ctx->irc_event.user_data = ctx;
 
@@ -1823,7 +1833,10 @@ parse_config (struct bot_context *ctx, struct error **e)
 	const char *delay_str = str_map_find (&ctx->config, "reconnect_delay");
 	hard_assert (delay_str != NULL);  // We have a default value for this
 	if (!xstrtoul (&ctx->reconnect_delay, delay_str, 10))
-		FAIL ("invalid configuration value for `%s'", "reconnect_delay");
+	{
+		return error_set (e,
+			"invalid configuration value for `%s'", "reconnect_delay");
+	}
 
 	hard_assert (!ctx->admin_re);
 	const char *admin = str_map_find (&ctx->config, "admin");
@@ -1847,7 +1860,7 @@ on_plugin_death (struct plugin *plugin, int status)
 	struct bot_context *ctx = plugin->ctx;
 
 	// TODO: callbacks on children death, so that we may tell the user
-	//       "plugin `name' died like a dirty jewish pig"; use `status'
+	//       "plugin `name' died"; use `status'
 	if (!plugin->is_zombie && WIFSIGNALED (status))
 	{
 		const char *notes = "";
@@ -1877,8 +1890,7 @@ on_plugin_death (struct plugin *plugin, int status)
 	plugin->read_fd = -1;
 
 	LIST_UNLINK (ctx->plugins, plugin);
-	plugin_free (plugin);
+	plugin_destroy (plugin);
-	free (plugin);
 
 	// Living child processes block us from quitting
 	try_finish_quit (ctx);
@@ -1956,8 +1968,8 @@ on_signal_pipe_readable (const struct pollfd *fd, struct bot_context *ctx)
 int
 main (int argc, char *argv[])
 {
-	str_vector_init (&g_original_argv);
+	g_original_argv = strv_make ();
-	str_vector_add_vector (&g_original_argv, argv);
+	strv_append_vector (&g_original_argv, argv);
 
 	static const struct opt opts[] =
 	{
@@ -1970,8 +1982,8 @@ main (int argc, char *argv[])
 		{ 0, NULL, NULL, 0, NULL }
 	};
 
-	struct opt_handler oh;
+	struct opt_handler oh =
-	opt_handler_init (&oh, argc, argv, opts, NULL, "Experimental IRC bot.");
+		opt_handler_make (argc, argv, opts, NULL, "Modular IRC bot.");
 
 	int c;
 	while ((c = opt_handler_get (&oh)) != -1)
@@ -1999,12 +2011,7 @@ main (int argc, char *argv[])
 
 	print_status (PROGRAM_NAME " " PROGRAM_VERSION " starting");
 	setup_signal_handlers ();
-
+	init_openssl ();
-	SSL_library_init ();
-	atexit (EVP_cleanup);
-	SSL_load_error_strings ();
-	// XXX: ERR_load_BIO_strings()?  Anything else?
-	atexit (ERR_free_strings);
 
 	struct bot_context ctx;
 	bot_context_init (&ctx);
@@ -2018,11 +2025,17 @@ main (int argc, char *argv[])
 		exit (EXIT_FAILURE);
 	}
 
-	poller_fd_init (&ctx.signal_event, &ctx.poller, g_signal_pipe[0]);
+	ctx.signal_event = poller_fd_make (&ctx.poller, g_signal_pipe[0]);
 	ctx.signal_event.dispatcher = (poller_fd_fn) on_signal_pipe_readable;
 	ctx.signal_event.user_data = &ctx;
 	poller_fd_set (&ctx.signal_event, POLLIN);
 
+#if OpenBSD >= 201605
+	// cpath is for creating the plugin home directory
+	if (pledge ("stdio rpath cpath inet proc exec", NULL))
+		exit_fatal ("%s: %s", "pledge", strerror (errno));
+#endif
+
 	plugin_load_all_from_config (&ctx);
 	if (!parse_config (&ctx, &e)
 	 || !irc_connect (&ctx, &e))
@@ -2044,7 +2057,7 @@ main (int argc, char *argv[])
 		poller_run (&ctx.poller);
 
 	bot_context_free (&ctx);
-	str_vector_free (&g_original_argv);
+	strv_free (&g_original_argv);
 	return EXIT_SUCCESS;
 }
 

xC.adoc

@@ -0,0 +1,127 @@
+xC(1)
+=====
+:doctype: manpage
+:manmanual: uirc3 Manual
+:mansource: uirc3 {release-version}
+
+Name
+----
+xC - terminal-based IRC client
+
+Synopsis
+--------
+*xC* [_OPTION_]...
+
+Description
+-----------
+*xC* is a scriptable IRC client for the command line.  On the first run it will
+welcome you with an introductory message.  Should you ever get lost, use the
+*/help* command to obtain more information on commands or options.
+
+Options
+-------
+*-f*, *--format*::
+	Format IRC text from the standard input, converting colour sequences and
+	other formatting marks to ANSI codes retrieved from the *terminfo*(5)
+	database:
++
+```
+printf '\x02bold\x02\n' | xC -f
+```
++
+This feature may be used to preview server MOTD files.
+
+*-h*, *--help*::
+	Display a help message and exit.
+
+*-V*, *--version*::
+	Output version information and exit.
+
+Key bindings
+------------
+Most key bindings are inherited from the frontend in use, which is either GNU
+Readline or BSD editline.  A few of them, however, are special to the IRC client
+or assume a different function.  This is a list of all local overrides and
+their respective function names:
+
+*M-p*::
+	Go up in history for this buffer (normally mapped to *C-p*).
+*M-n*::
+	Go down in history for this buffer (normally mapped to *C-n*).
+*C-p*, *F5*: *previous-buffer*::
+	Switch to the previous buffer in order.
+*C-n*, *F6*: *next-buffer*::
+	Switch to the next buffer in order.
+*M-TAB*: *switch-buffer*::
+	Switch to the last buffer, i.e., the one you were in before.
+*M-0*, *M-1*, ..., *M-9*: *goto-buffer*::
+	Go to the N-th buffer (normally sets a repeat counter).
+	Since there is no buffer number zero, *M-0* goes to the tenth one.
+*M-!*: *goto-highlight*::
+	Go to the first following buffer with an unseen highlight.
+*M-a*: *goto-activity*::
+	Go to the first following buffer with unseen activity.
+*PageUp*: *display-backlog*::
+	Show the in-memory backlog for this buffer in the backlog helper,
+	which is almost certainly the *less*(1) program.
+*M-h*: *display-full-log*::
+	Show the log file for this buffer in the backlog helper.
+*M-H*: *toggle-unimportant*::
+	Hide all join, part and quit messages, as well as all channel mode changes
+	that only relate to user channel modes.  Intended to reduce noise in
+	channels with lots of people.
+*M-e*: *edit-input*::
+	Run an editor on the command line, making it easy to edit multiline
+	messages.  Remember to save the file before exit.
+*M-m*: *insert-attribute*::
+	The next key will be interpreted as a formatting mark to insert:
+	*c* for colours (optionally followed by numbers for the foreground
+	and background), *i* for italics, *b* for bold text, *u* for underlined,
+	*x* for struck-through, *v* for inverse text and *o* resets all formatting.
+*C-l*: *redraw-screen*::
+	Should there be any issues with the display, this will clear the terminal
+	screen and redraw all information.
+
+Additionally, *C-w* and *C-u* in editline behave the same as they would in
+Readline or the "vi" command mode, even though the "emacs" mode is enabled
+by default.
+
+Bindings can be customized in your _.inputrc_ or _.editrc_ file.  Both libraries
+support conditional execution based on the program name.  Beware that it is easy
+to make breaking changes.
+
+Environment
+-----------
+*VISUAL*, *EDITOR*::
+	The editor program to be launched by the *edit-input* function.
+	If neither variable is set, it defaults to *vi*(1).
+
+Files
+-----
+*xC* follows the XDG Base Directory Specification.
+
+_~/.config/xC/xC.conf_::
+	The program's configuration file.  Preferrably use internal facilities, such
+	as the */set* command, to make changes in it.
+
+_~/.local/share/xC/logs/_::
+	When enabled by *behaviour.logging*, log files are stored here.
+
+_~/.local/share/xC/plugins/_::
+_/usr/local/share/xC/plugins/_::
+_/usr/share/xC/plugins/_::
+	Plugins are searched for in these directories, in order.
+
+Bugs
+----
+The editline (libedit) frontend is more of a proof of concept that mostly seems
+to work but exhibits bugs that are not our fault.
+
+Reporting bugs
+--------------
+Use https://git.janouch.name/p/uirc3 to report bugs, request features,
+or submit pull requests.
+
+See also
+--------
+*less*(1), *readline*(3) or *editline*(7)

xD-gen-replies.sh

@@ -2,7 +2,7 @@
 LC_ALL=C exec awk '
 	BEGIN {
 		# The message catalog is a by-product
-		msg = "kike.msg"
+		msg = "xD.msg"
 		print "$quote \"" > msg;
 		print "$set 1" > msg;
 	}

xD-replies

@@ -85,3 +85,9 @@
 482 IRC_ERR_CHANOPRIVSNEEDED "%s :You're not channel operator"
 501 IRC_ERR_UMODEUNKNOWNFLAG ":Unknown MODE flag"
 502 IRC_ERR_USERSDONTMATCH ":Cannot change mode for other users"
+902 IRC_ERR_NICKLOCKED ":You must use a nick assigned to you"
+903 IRC_RPL_SASLSUCCESS ":SASL authentication successful"
+904 IRC_ERR_SASLFAIL ":SASL authentication failed"
+905 IRC_ERR_SASLTOOLONG ":SASL message too long"
+906 IRC_ERR_SASLABORTED ":SASL authentication aborted"
+907 IRC_ERR_SASLALREADY ":You have already authenticated using SASL"

xD.adoc

@@ -0,0 +1,53 @@
+xD(1)
+=====
+:doctype: manpage
+:manmanual: uirc3 Manual
+:mansource: uirc3 {release-version}
+
+Name
+----
+xD - IRC daemon
+
+Synopsis
+--------
+*xD* [_OPTION_]...
+
+Description
+-----------
+*xD* is a basic IRC daemon for single-server networks, suitable for testing
+and private use.  When run without a configuration file, it will start listening
+on the standard port 6667 and the "any" address.
+
+Options
+-------
+*-d*, *--debug*::
+	Do not daemonize, print more information on the standard error stream
+	to help debug various issues.
+
+*-h*, *--help*::
+	Display a help message and exit.
+
+*-V*, *--version*::
+	Output version information and exit.
+
+*--write-default-cfg*[**=**__PATH__]::
+	Write a configuration file with defaults, show its path and exit.
++
+The file will be appropriately commented.
++
+When no _PATH_ is specified, it will be created in the user's home directory,
+contrary to what you might expect from a server.
+
+Files
+-----
+*xD* follows the XDG Base Directory Specification.
+
+_~/.config/xD/xD.conf_::
+_/etc/xdg/xD/xD.conf_::
+	The daemon's configuration file.  Use the *--write-default-cfg* option
+	to create a new one for editing.
+
+Reporting bugs
+--------------
+Use https://git.janouch.name/p/uirc3 to report bugs, request features,
+or submit pull requests.