liustsim: adjust colours

As well as disabling the field altogether.

CMakeLists.txt

@@ -19,14 +19,12 @@ find_package (PkgConfig REQUIRED)
 pkg_check_modules (x REQUIRED x11 xext xextproto)
 pkg_check_modules (pulse REQUIRED libpulse)
 pkg_check_modules (dbus REQUIRED dbus-1)
-pkg_check_modules (libusb libusb-1.0)
 pkg_check_modules (gdm gdm glib-2.0 gio-2.0)
 include_directories (
 	${x_INCLUDE_DIRS} ${pulse_INCLUDE_DIRS} ${dbus_INCLUDE_DIRS})
 link_directories (
 	${x_LIBRARY_DIRS} ${pulse_LIBRARY_DIRS} ${dbus_LIBRARY_DIRS})
 
-option (WITH_USB "Compile with USB utilities" ${libusb_FOUND})
 option (WITH_GDM "Compile with GDM utilities" ${gdm_FOUND})
 
 # Generate a configuration file
@@ -35,7 +33,7 @@ configure_file (${PROJECT_SOURCE_DIR}/config.h.in
 include_directories (${PROJECT_BINARY_DIR})
 
 # Build
-set (targets wmstatus paswitch siprandom)
+set (targets wmstatus paswitch siprandom genpass)
 if ("${CMAKE_SYSTEM_NAME}" STREQUAL Linux)
 	# These use Linux i2c APIs, but can be made to work on macOS
 	list (APPEND targets brightness input-switch)
@@ -59,13 +57,6 @@ target_link_libraries (wmstatus
 	${x_LIBRARIES} ${pulse_LIBRARIES} ${dbus_LIBRARIES})
 add_threads (wmstatus)
 
-if (WITH_USB)
-	list (APPEND targets elksmart-comm)
-	add_executable (elksmart-comm elksmart-comm.c)
-	target_include_directories (elksmart-comm PUBLIC ${libusb_INCLUDE_DIRS})
-	target_link_directories (elksmart-comm PUBLIC ${libusb_LIBRARY_DIRS})
-	target_link_libraries (elksmart-comm ${libusb_LIBRARIES})
-endif ()
 if (WITH_GDM)
 	list (APPEND targets gdm-switch-user)
 	add_executable (gdm-switch-user gdm-switch-user.c)
@@ -105,7 +96,8 @@ endif ()
 
 # These should be accessible by users, but need to touch system devices.
 # Use the setuid bit, for simplicity.
-foreach (target brightness input-switch elksmart-comm)
+set (SETUID "SETUID" CACHE STRING "Set this empty on permission issues")
+foreach (target brightness input-switch)
 	if (${target} IN_LIST targets)
 		list (REMOVE_ITEM targets ${target})
 		install (TARGETS ${target} DESTINATION ${CMAKE_INSTALL_BINDIR}
@@ -113,7 +105,7 @@ foreach (target brightness input-switch elksmart-comm)
 				OWNER_WRITE OWNER_READ OWNER_EXECUTE
 				GROUP_READ GROUP_EXECUTE
 				WORLD_READ WORLD_EXECUTE
-				SETUID)
+				${SETUID})
 	endif ()
 endforeach ()
 

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2015 - 2024, Přemysl Eric Janouch <p@janouch.name>
+Copyright (c) 2015 - 2025, 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.

README.adoc

@@ -27,8 +27,6 @@ to other people as well:
    pseudo-random data; it should be fast enough to saturate most devices
  - 'big-brother' tracks the title of the active window and the idle state of
    the user and writes these events to standard output.
- - 'elksmart-comm' interfaces with ELK Smart infrared dongles,
-   partially reimplementing the Ocrustar mobile app.
 
 Few of them are useful outside of Linux.
 
@@ -40,8 +38,7 @@ Building
 --------
 Build dependencies: CMake, pkg-config, liberty (included) +
 Runtime dependencies: libpulse, libx11, dbus-1 +
-Optional runtime dependencies:
-libusb-1.0 (elksmart-comm), libgdm (gdm-switch-user)
+Optional runtime dependencies: libgdm (gdm-switch-user)
 
  $ git clone --recursive https://git.janouch.name/p/desktop-tools.git
  $ mkdir desktop-tools/build

elksmart-comm.c

@@ -1,703 +0,0 @@
-/*
- * elksmart-comm.c: ELK Smart infrared dongle tool (for EKX4S and EKX5S-T)
- *
- * Copyright (c) 2024, 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.
- *
- */
-
-#include "config.h"
-#undef PROGRAM_NAME
-#define PROGRAM_NAME "elksmart-comm"
-#include "liberty/liberty.c"
-
-#include <libusb.h>
-
-// --- Utilities ---------------------------------------------------------------
-
-/// Search for a device with given vendor and product ID.
-/// This is quite similar to libusb_open_device_with_vid_pid().
-static libusb_device_handle *
-find_device (int vendor, int product, int *error)
-{
-	libusb_device **list = NULL;
-	libusb_device_handle *handle = NULL;
-	int result = 0;
-
-	ssize_t len = libusb_get_device_list (NULL, &list);
-	if (len < 0)
-	{
-		result = len;
-		goto out;
-	}
-
-	for (ssize_t i = 0; i < len; i++)
-	{
-		libusb_device *device = list[i];
-		struct libusb_device_descriptor desc = {};
-		if ((result = libusb_get_device_descriptor (device, &desc)))
-			print_debug ("%s", libusb_strerror (result));
-		else if (desc.idVendor != vendor || desc.idProduct != product)
-			continue;
-		else if (!(result = libusb_open (device, &handle)))
-			break;
-	}
-
-	libusb_free_device_list (list, true);
-out:
-	if (error != NULL && result != 0)
-		*error = result;
-	return handle;
-}
-
-static void
-wait_ms (long ms)
-{
-	struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
-	nanosleep (&ts, NULL);
-}
-
-static void
-dump_hex (const unsigned char *buf, size_t len)
-{
-	for (size_t i = 0; i < len; i++)
-		printf ("%02x", buf[i]);
-	printf ("\n");
-}
-
-static bool
-read_hex (const char *string, struct str *out)
-{
-	static const char *alphabet = "0123456789abcdef";
-	str_reset (out);
-	while (true)
-	{
-		while (*string && strchr (" \t\n\r\v\f", *string))
-			string++;
-		if (!*string)
-			return true;
-
-		const char *hi, *lo;
-		if (!(hi = strchr (alphabet, tolower_ascii (*string++))) || !*string
-		 || !(lo = strchr (alphabet, tolower_ascii (*string++))))
-			return false;
-
-		str_pack_u8 (out, (hi - alphabet) << 4 | (lo - alphabet));
-	}
-}
-
-// --- Coding ------------------------------------------------------------------
-
-// Values are in microseconds.
-struct pulse { unsigned on, off; };
-
-static bool
-pulse_equal (struct pulse a, struct pulse b)
-{
-	return a.on == b.on && a.off == b.off;
-}
-
-static size_t
-decode_learned_direct (const uint8_t *b, size_t b_len, struct pulse *pulses)
-{
-	size_t pulses_len = 0;
-	for (size_t i = 0; i < b_len; )
-	{
-		struct pulse *pulse = &pulses[pulses_len++];
-		while (b[i] == 0xff)
-		{
-			pulse->on += 4080;
-			if (++i == b_len)
-				return 0;
-		}
-		pulse->on += b[i++] * 16;
-
-		// Who cares, presumably it stays off.
-		if (i == b_len)
-			break;
-
-		while (b[i] == 0xff)
-		{
-			pulse->off += 4080;
-			if (++i == b_len)
-				return 0;
-		}
-		pulse->off += b[i++] * 16;
-	}
-	return pulses_len;
-}
-
-static struct pulse *
-decode_learned (const struct str *code, size_t *len, struct error **e)
-{
-	// This conveniently has an upper bound.
-	struct pulse *pulses = xcalloc (code->len, sizeof *pulses);
-	if (!(*len = decode_learned_direct
-		((const uint8_t *) code->str, code->len, pulses)))
-	{
-		error_set (e, "code ends unexpectedly");
-		free (pulses);
-		return NULL;
-	}
-	return pulses;
-}
-
-static struct pulse *
-encode_nec_byte (struct pulse *p, uint8_t byte)
-{
-	for (int i = 7; i >= 0; i--)
-		*p++ = (struct pulse)
-			{ .on = 550, .off = ((byte >> i) & 1) ? 1650 : 550 };
-	return p;
-}
-
-static struct pulse *
-encode_nec (const struct str *code, size_t *len, struct error **e)
-{
-	if (code->len % 2)
-	{
-		error_set (e, "NEC transmission format requires pairs");
-		return NULL;
-	}
-
-	// The timings seem to be rather tolerant.
-	*len = code->len / 2 * (1 /* leader */ + 32 + 1 /* stop */);
-	struct pulse *pulses = xcalloc (*len, sizeof *pulses), *p = pulses;
-	for (size_t i = 0; i < code->len; i += 2)
-	{
-		*p++ = (struct pulse) { .on = 8500, .off = 4250 };
-		p = encode_nec_byte (p, code->str[i + 0]);
-		p = encode_nec_byte (p, ~code->str[i + 0]);
-		p = encode_nec_byte (p, code->str[i + 1]);
-		p = encode_nec_byte (p, ~code->str[i + 1]);
-		*p++ = (struct pulse) { .on = 550, .off = 25000 };
-	}
-	return pulses;
-}
-
-static void
-compress_value (unsigned value, struct str *encoded)
-{
-	if (value <= 2032)
-	{
-		// We fix a minor problem in the original Ocrustar algorithm.
-		uint8_t v = value / 16. + .5;
-		str_pack_u8 (encoded, MAX (2, v));
-	}
-	else
-		do
-		{
-			uint8_t v = value & 0x7f;
-			if ((value >>= 7))
-				v |= 0x80;
-			str_pack_u8 (encoded, v);
-		} while (value);
-}
-
-static void
-compress_pulses (const struct pulse *pulses, size_t len, struct str *encoded)
-{
-	unsigned counts[len];
-	memset (counts, 0, sizeof counts);
-	for (size_t i = 0; i < len; i++)
-		for (size_t k = 0; k < len; k++)
-			if (pulse_equal (pulses[i], pulses[k]))
-				counts[i]++;
-
-	struct pulse p1 = {}, p2 = {};
-	size_t top1 = 0, top2 = 0;
-	for (size_t i = 0; i < len; i++)
-		if (counts[i] > counts[top1])
-			p1 = pulses[top1 = i];
-	for (size_t i = 0; i < len; i++)
-		if (counts[i] < counts[top1]
-		 && counts[i] > counts[top2])
-			p2 = pulses[top2 = i];
-		else if (counts[top2] == counts[top1])
-			p2 = pulses[top2 = i];
-
-	// Although I haven't really tried it, something tells me that
-	// this will work even in the degenerated case of len <= 2.
-	// XXX: The receiver might not like multibyte values here,
-	//   Ocrustar also oddly replaces 0xff with 0xfe for these fields.
-	compress_value (p2.on, encoded);
-	compress_value (p2.off, encoded);
-	compress_value (p1.on, encoded);
-	compress_value (p1.off, encoded);
-	str_pack_u8 (encoded, -1);
-	str_pack_u8 (encoded, -1);
-	str_pack_u8 (encoded, -1);
-
-	for (size_t i = 0; i < len; i++)
-	{
-		if (pulse_equal (pulses[i], p1))
-			str_pack_u8 (encoded, 0);
-		else if (pulse_equal (pulses[i], p2))
-			str_pack_u8 (encoded, 1);
-		else
-		{
-			compress_value (pulses[i].on, encoded);
-			compress_value (pulses[i].off, encoded);
-		}
-	}
-}
-
-// --- Device interaction ------------------------------------------------------
-
-enum
-{
-	USB_VENDOR_SMTCTL = 0x045c,
-
-	// 0x134 (EKX5S ~ 5s, 5th generation remote)
-	// 0x195 (EKX4S ~ 4s, 4th generation remote)
-	// 0x184 (EKX5S-T, international edition)
-	USB_PRODUCT_SMTCTL_SMART_EKX4S = 0x0195,
-	USB_PRODUCT_SMTCTL_SMART_EKX5S_T = 0x0184,
-
-	// There should only ever be one interface.
-	USB_INTERFACE = 0,
-};
-
-static uint8_t
-	c_transmit[] = { -1, -1, -1, -1 },
-	c_learn[]    = { -2, -2, -2, -2 },
-	c_stop[]     = { -3, -3, -3, -3 },
-	c_identify[] = { -4, -4, -4, -4 };
-
-static struct
-{
-	unsigned char endpoint_out;         ///< Outgoing endpoint
-	unsigned char endpoint_in;          ///< Incoming endpoint
-}
-g;
-
-static bool
-init_device_from_desc (struct libusb_config_descriptor *desc, struct error **e)
-{
-	// We're not being particuarly strict in here.
-	if (desc->bNumInterfaces != 1)
-		return error_set (e, "unexpected USB interface count");
-	if (desc->interface->num_altsetting != 1)
-		return error_set (e, "unexpected alternate setting count");
-
-	const struct libusb_interface_descriptor *asd = desc->interface->altsetting;
-	if (asd->bInterfaceClass != LIBUSB_CLASS_COMM)
-		return error_set (e, "unexpected USB interface class");
-	if (asd->bNumEndpoints != 2)
-		return error_set (e, "unexpected endpoint count");
-
-	bool have_out = false, have_in = false;
-	for (uint8_t i = 0; i < asd->bNumEndpoints; i++)
-	{
-		const struct libusb_endpoint_descriptor *epd = asd->endpoint + i;
-		if ((epd->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK)
-			!= LIBUSB_ENDPOINT_TRANSFER_TYPE_BULK)
-			return error_set (e, "unexpected endpoint transfer type");
-
-		switch ((epd->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK))
-		{
-		break; case LIBUSB_ENDPOINT_OUT:
-			have_out = true;
-			g.endpoint_out = epd->bEndpointAddress;
-		break; case LIBUSB_ENDPOINT_IN:
-			have_in = true;
-			g.endpoint_in = epd->bEndpointAddress;
-		}
-	}
-	if (!have_out || !have_in)
-		return error_set (e, "USB interface is not bidirectional");
-	return true;
-}
-
-static bool
-init_device (libusb_device_handle *device, struct error **e)
-{
-	struct libusb_config_descriptor *desc = NULL;
-	int result =
-		libusb_get_active_config_descriptor (libusb_get_device (device), &desc);
-	if (result)
-		return error_set (e, "%s", libusb_strerror (result));
-
-	bool ok = true;
-	if ((result = libusb_kernel_driver_active (device, USB_INTERFACE)) == 1)
-		ok = error_set (e, "device is claimed by a kernel driver");
-	else if (result)
-		ok = error_set (e, "%s", libusb_strerror (result));
-	else
-		ok = init_device_from_desc (desc, e);
-
-	libusb_free_config_descriptor (desc);
-	return ok;
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-static uint8_t
-mangle (uint8_t value)
-{
-	uint8_t reversed = 0;
-	for (int i = 0; i < 8; i++)
-	{
-		reversed = (reversed << 1) | (value & 1);
-		value >>= 1;
-	}
-	return ~reversed;
-}
-
-static uint8_t
-checksum (const uint8_t *b, size_t len)
-{
-	uint32_t sum = 0;
-	for (size_t i = 0; i < len; i++)
-		sum += b[i];
-	return mangle ((sum & 0xF0) | ((sum >> 8) & 0x0F));
-}
-
-static bool
-send_transmit (libusb_device_handle *device, unsigned long frequency,
-	const struct pulse *pulses, size_t pulses_len, struct error **e)
-{
-	if (g_debug_mode)
-		for (size_t i = 0; i < pulses_len; )
-		{
-			printf ("%u,%u", pulses[i].on, pulses[i].off);
-			putchar (++i == pulses_len ? '\n' : ',');
-		}
-
-	struct str compressed = str_make ();
-	compress_pulses (pulses, pulses_len, &compressed);
-
-	struct str message = str_make ();
-	str_append_data (&message, c_transmit, sizeof c_transmit);
-	frequency += 0x7ffff;
-	str_pack_u8 (&message, mangle (frequency >> 8));
-	str_pack_u8 (&message, mangle (frequency >> 16));
-	str_pack_u8 (&message, mangle (frequency));
-	str_pack_u8 (&message, mangle (compressed.len >> 8));
-	str_pack_u8 (&message, mangle (compressed.len));
-	str_append_str (&message, &compressed);
-	str_free (&compressed);
-
-	size_t i = 0;
-	uint8_t buffer[64];
-	bool ok = true;
-	while (i != message.len)
-	{
-		size_t chunk = MIN (62, message.len - i);
-		memcpy (buffer, message.str + i, chunk);
-		i += chunk;
-		if (chunk == 62)
-		{
-			buffer[chunk] = checksum (buffer, chunk);
-			chunk++;
-		}
-
-		int result = 0, len = 0;
-		if ((result = libusb_bulk_transfer (device, g.endpoint_out,
-			buffer, chunk, &len, 100)))
-		{
-			ok = error_set (e, "send: %s", libusb_strerror (result));
-			break;
-		}
-		wait_ms (2);
-	}
-	str_free (&message);
-	return ok;
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-static bool
-pulse_is_likely_leader (const struct pulse *p)
-{
-	return p->on >= 2048 && p->off >= 2048;
-}
-
-static void
-try_to_depulse (const struct str *code)
-{
-	size_t len = 0;
-	struct pulse *pulses = decode_learned (code, &len, NULL);
-	if (!pulses)
-		return;
-
-	struct pulse *p = pulses, *end = p + len;
-	while (p != end && pulse_is_likely_leader (p))
-	{
-		p++;
-		printf ("Attempted pulse decode:\n");
-
-		uint8_t bits = 0, nibble = 0;
-		for (; p != end && !pulse_is_likely_leader (p); p++)
-		{
-			nibble = nibble << 1 | (p->off > 2 * p->on);
-			if (++bits == 4)
-			{
-				putchar ("0123456789abcdef"[nibble]);
-				bits = nibble = 0;
-			}
-		}
-		putchar ('\n');
-	}
-	free (pulses);
-}
-
-static bool
-recv_learn (libusb_device_handle *device, struct str *data, struct error **e)
-{
-	uint8_t buffer[64] = {};
-	int result = 0, len = 0;
-	while ((result = libusb_bulk_transfer (device, g.endpoint_in,
-		buffer, sizeof buffer, &len, 100)))
-	{
-		if (result != LIBUSB_ERROR_TIMEOUT)
-			return error_set (e, "learn/recv: %s", libusb_strerror (result));
-		print_debug ("learn/recv: %s", libusb_strerror (result));
-	}
-	if (len < 6 || memcmp (buffer, c_learn, sizeof c_learn))
-		return error_set (e, "learn/recv: %s", "unexpected response");
-
-	// This field might only make sense for a later device,
-	// because it doesn't always correspond with how much data we receive.
-	// Nonetheless, it does match exactly often enough.
-	size_t size = buffer[4] << 8 | buffer[5];
-	print_debug ("learn: code size: %zu", size);
-
-	str_append_data (data, buffer + 6, len - 6);
-	dump_hex ((const unsigned char *) data->str, data->len);
-	while (data->len < size)
-	{
-		if (!(result = libusb_bulk_transfer (device, g.endpoint_in,
-			buffer, sizeof buffer, &len, 100)))
-		{
-			dump_hex (buffer, len);
-
-			str_append_data (data, buffer, len);
-			print_debug ("learn: received %d (have %zu of %zu)",
-				len, data->len, size);
-			continue;
-		}
-		if (result != LIBUSB_ERROR_TIMEOUT)
-			return error_set (e, "learn/recv: %s", libusb_strerror (result));
-
-		// The device seems to queue up its output with pauses.
-		print_debug ("learn/recv: %s", libusb_strerror (result));
-	}
-
-	// As far as I know, this doesn't do anything,
-	// and the device doesn't accept it while scanning infrared codes either.
-	if ((result = libusb_bulk_transfer (device, g.endpoint_out,
-		c_stop, sizeof c_stop, &len, 100)))
-		return error_set (e, "learn/send: %s", libusb_strerror (result));
-	return true;
-}
-
-static bool
-send_learn (libusb_device_handle *device, struct error **e)
-{
-	int result = 0, len = 0;
-	if ((result = libusb_bulk_transfer (device, g.endpoint_out,
-		c_learn, sizeof c_learn, &len, 100)))
-		return error_set (e, "learn/send: %s", libusb_strerror (result));
-
-	printf ("Reading remote control codes.\n");
-	printf ("Press a remote control button from less than a centimeter.\n");
-	printf ("The dongle may be unusable until it returns some data.\n");
-	// ... Resetting the device using libusb_reset_device() doesn't help then.
-	printf ("If the code fails to replay, retry the capture.\n");
-
-	struct str data = str_make ();
-	bool ok = recv_learn (device, &data, e);
-	if (ok)
-	{
-		printf ("Full command:\n");
-		dump_hex ((const unsigned char *) data.str, data.len);
-		try_to_depulse (&data);
-	}
-
-	str_free (&data);
-	return ok;
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-static bool
-send_identify (libusb_device_handle *device, struct error **e)
-{
-	uint8_t buffer[64] = {};
-	int result = 0, len = 0;
-	while (!(result = libusb_bulk_transfer (device, g.endpoint_in,
-		buffer, sizeof buffer, &len, 10)))
-		/* Flush buffers. */;
-
-	if ((result = libusb_bulk_transfer (device, g.endpoint_out,
-		c_identify, sizeof c_identify, &len, 100)))
-		return error_set (e, "identify/send: %s", libusb_strerror (result));
-	if ((result = libusb_bulk_transfer (device, g.endpoint_in,
-		buffer, sizeof buffer, &len, 100)))
-		return error_set (e, "identify/recv: %s", libusb_strerror (result));
-
-	// XXX: Sometimes, the device doesn't send any identification values.
-	if (len != 6 || memcmp (buffer, c_identify, sizeof c_identify)
-	 || buffer[4] != 0x70 || buffer[5] != 0x01)
-		return error_set (e, "device busy or not supported");
-
-#if 0
-	// The EKX4S does not respond to this request.
-	static uint8_t c_serial[] = { -5, -5, -5, -5 };
-	if ((result = libusb_bulk_transfer (device, g.endpoint_out,
-		c_serial, sizeof c_serial, &len, 100)))
-		return error_set (e, "serial/send: %s", libusb_strerror (result));
-	if ((result = libusb_bulk_transfer (device, g.endpoint_in,
-		buffer, sizeof buffer, &len, 100)))
-		return error_set (e, "serial/recv: %s", libusb_strerror (result));
-	if (len < (int) sizeof c_serial
-	 || memcmp (buffer, c_serial, sizeof c_serial))
-		return error_set (e, "serial retrieval failed");
-#endif
-	return true;
-}
-
-static bool
-run (libusb_device_handle *device, unsigned long frequency, bool nec,
-	char **codes, size_t codes_len, struct error **e)
-{
-	if (!send_identify (device, e))
-		return false;
-	if (!codes_len)
-		return send_learn (device, e);
-
-	struct str code = str_make ();
-	bool ok = true;
-	for (size_t i = 0; i < codes_len; i++)
-	{
-		if (!read_hex (codes[i], &code))
-		{
-			ok = error_set (e, "invalid hex string");
-			break;
-		}
-
-		size_t pulses_len = 0;
-		struct pulse *pulses = nec
-			? encode_nec (&code, &pulses_len, e)
-			: decode_learned (&code, &pulses_len, e);
-
-		ok = pulses && send_transmit (device, frequency, pulses, pulses_len, e);
-		free (pulses);
-		if (!ok)
-			break;
-
-		wait_ms (100);
-	}
-	str_free (&code);
-	return ok;
-}
-
-// --- Main --------------------------------------------------------------------
-
-int
-main (int argc, char *argv[])
-{
-	unsigned long frequency = 38000;
-	bool nec = false;
-	static const struct opt opts[] =
-	{
-		{ 'd', "debug", NULL, 0, "run in debug mode" },
-		{ 'f', "frequency", "HZ", 0, "frequency (38000 Hz by default)" },
-		{ 'n', "nec", NULL, 0, "use the NEC transmission format" },
-		{ 'h', "help", NULL, 0, "display this help and exit" },
-		{ 'V', "version", NULL, 0, "output version information and exit" },
-		{ 0, NULL, NULL, 0, NULL }
-	};
-
-	struct opt_handler oh = opt_handler_make (argc, argv, opts, "[COMMAND...]",
-		"Transmit or receive infrared commands.");
-
-	int c;
-	while ((c = opt_handler_get (&oh)) != -1)
-	switch (c)
-	{
-	case 'd':
-		g_debug_mode = true;
-		break;
-	case 'f':
-		if (!xstrtoul (&frequency, optarg, 10) || !frequency)
-			exit_fatal ("invalid frequency");
-		break;
-	case 'n':
-		nec = true;
-		break;
-	case 'h':
-		opt_handler_usage (&oh, stdout);
-		exit (EXIT_SUCCESS);
-	case 'V':
-		printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
-		exit (EXIT_SUCCESS);
-	default:
-		print_error ("wrong options");
-		opt_handler_usage (&oh, stderr);
-		exit (EXIT_FAILURE);
-	}
-
-	argc -= optind;
-	argv += optind;
-
-	opt_handler_free (&oh);
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-#if LIBUSB_API_VERSION >= 0x0100010A
-	const struct libusb_init_option option =
-	{
-		.option = LIBUSB_OPTION_LOG_LEVEL,
-		.value.ival = LIBUSB_LOG_LEVEL_DEBUG,
-	};
-	int result = libusb_init_context (NULL, &option, g_debug_mode);
-#else
-	int result = libusb_init (NULL);
-#endif
-	if (result)
-		exit_fatal ("libusb: %s", libusb_strerror (result));
-
-	libusb_device_handle *device = NULL;
-	if (!device && !result)
-		device = find_device (USB_VENDOR_SMTCTL,
-			USB_PRODUCT_SMTCTL_SMART_EKX4S, &result);
-	if (!device && !result)
-		device = find_device (USB_VENDOR_SMTCTL,
-			USB_PRODUCT_SMTCTL_SMART_EKX5S_T, &result);
-
-	if (result)
-		exit_fatal ("couldn't open device: %s", libusb_strerror (result));
-	else if (!device)
-		exit_fatal ("no suitable device found");
-
-	struct error *e = NULL;
-	if (!init_device (device, &e))
-		exit_fatal ("%s", e->message);
-	if ((result = libusb_claim_interface (device, USB_INTERFACE)) == 1)
-		exit_fatal ("couldn't claim interface: %s", libusb_strerror (result));
-
-	if (!run (device, frequency, nec, argv, argc, &e))
-	{
-		print_error ("%s", e->message);
-		error_free (e);
-	}
-
-	if ((result = libusb_release_interface (device, USB_INTERFACE)) == 1)
-		exit_fatal ("couldn't release interface: %s", libusb_strerror (result));
-
-	libusb_close (device);
-	libusb_exit (NULL);
-	return 0;
-}

genpass.c

@@ -0,0 +1,151 @@
+/*
+ * genpass.c: password generator
+ *
+ * Copyright (c) 2025, 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.
+ *
+ */
+
+#include "config.h"
+#undef PROGRAM_NAME
+#define PROGRAM_NAME "genpass"
+#include "liberty/liberty.c"
+
+static struct str
+parse_group (const char *group)
+{
+	bool present[0x100] = {};
+	for (size_t i = 0; group[i]; i++)
+	{
+		unsigned char c = group[i];
+		if (!i || c != '-' || !group[i + 1])
+			present[c] = true;
+		else if (group[i + 1] < group[i - 1])
+			exit_fatal ("character ranges must be increasing");
+		else
+			for (c = group[i - 1]; ++c <= group[i + 1]; )
+				present[c] = true;
+	}
+
+	struct str alphabet = str_make ();
+	for (size_t i = 1; i < N_ELEMENTS (present); i++)
+		if (present[i])
+			str_append_c (&alphabet, i);
+	if (!alphabet.len)
+		exit_fatal ("empty group");
+	return alphabet;
+}
+
+static void
+parse_program_arguments (int argc, char **argv,
+	unsigned long *length, struct strv *groups, struct str *alphabet)
+{
+	static const struct opt opts[] =
+	{
+		{ 'l', "length", "CHARACTERS", 0, "set password length" },
+		{ 'd', "debug", NULL, 0, "run in debug mode" },
+		{ 'h', "help", NULL, 0, "display this help and exit" },
+		{ 'V', "version", NULL, 0, "output version information and exit" },
+		{ 0, NULL, NULL, 0, NULL }
+	};
+
+	struct opt_handler oh =
+		opt_handler_make (argc, argv, opts, "GROUP...", "Password generator.");
+
+	int c;
+	while ((c = opt_handler_get (&oh)) != -1)
+	switch (c)
+	{
+	case 'l':
+		if (!xstrtoul (length, optarg, 10) || *length <= 0)
+			print_fatal ("invalid length argument");
+		break;
+	case 'd':
+		g_debug_mode = true;
+		break;
+	case 'h':
+		opt_handler_usage (&oh, stdout);
+		exit (EXIT_SUCCESS);
+	case 'V':
+		printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
+		exit (EXIT_SUCCESS);
+	default:
+		print_error ("wrong options");
+		opt_handler_usage (&oh, stderr);
+		exit (EXIT_FAILURE);
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	for (int i = 0; i < argc; i++)
+	{
+		struct str alphabet = parse_group (argv[i]);
+		strv_append_owned (groups, str_steal (&alphabet));
+	}
+
+	bool present[0x100] = {};
+	for (size_t i = 0; i < groups->len; i++)
+		for (size_t k = 0; groups->vector[i][k]; k++)
+		{
+			unsigned char c = groups->vector[i][k];
+			if (present[c])
+				exit_fatal ("groups are not disjunct");
+			present[c] = true;
+		}
+	for (size_t i = 1; i < N_ELEMENTS (present); i++)
+		if (present[i])
+			str_append_c (alphabet, i);
+
+	if (groups->len > *length)
+		exit_fatal ("the requested length is less than the number of groups");
+	if (!groups->len)
+	{
+		opt_handler_usage (&oh, stderr);
+		exit (EXIT_FAILURE);
+	}
+
+	opt_handler_free (&oh);
+}
+
+int
+main (int argc, char *argv[])
+{
+	unsigned long length = 8;
+	struct strv groups = strv_make ();
+	struct str alphabet = str_make ();
+	parse_program_arguments (argc, argv, &length, &groups, &alphabet);
+
+	unsigned seed = 0;
+	if (!random_bytes (&seed, sizeof seed, NULL))
+		exit_fatal ("failed to initialize random numbers");
+	srand (seed);
+
+	// Select from a joined alphabet, but make sure all groups are represented.
+	struct str candidate = str_make ();
+	while (true)
+	{
+restart:
+		for (size_t i = length; i--; )
+			str_append_c (&candidate, alphabet.str[rand () % alphabet.len]);
+		for (size_t i = 0; i < groups.len; i++)
+			if (!strpbrk (candidate.str, groups.vector[i]))
+			{
+				str_reset (&candidate);
+				goto restart;
+			}
+
+		printf ("%s\n", candidate.str);
+		return 0;
+	}
+}

liust-50/README.adoc

@@ -0,0 +1,18 @@
+LIUST-50
+========
+
+Included here are a simulator for the Toshiba Tec LIUST-A00 (LIUST-50)
+VFD line display, and a status program sending data to the device.
+
+For device documentation, see https://github.com/boricha/M202MD12D which is
+seemingly a project for the later LIUST-A10.
+
+Device setup
+------------
+ # stty -F /dev/ttyS0 9600 parenb oddp -crtscts -cstopb cs8
+
+Running
+-------
+ # liustatus > /dev/ttyS0
+
+ $ liustatus | liustsim

liust-50/charset/charset.go

@@ -0,0 +1,211 @@
+package charset
+
+import (
+	"bytes"
+	_ "embed"
+	"image"
+	_ "image/png"
+	"log"
+)
+
+// Charsets are loosely based on CP 437 and JIS X 0201.
+
+var runesJapan2 = [256]rune{
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+	0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+	0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+	0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+	0x58, 0x59, 0x5A, 0x5B, '¥', 0x5D, 0x5E, 0x5F,
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+	0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+	0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, '⌂',
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	'▒', '｡', '｢', '｣', '､', '･', 'ｦ', 'ｧ',
+	'ｨ', 'ｩ', 'ｪ', 'ｫ', 'ｬ', 'ｭ', 'ｮ', 'ｯ',
+	'ｰ', 'ｱ', 'ｲ', 'ｳ', 'ｴ', 'ｵ', 'ｶ', 'ｷ',
+	'ｸ', 'ｹ', 'ｺ', 'ｻ', 'ｼ', 'ｽ', 'ｾ', 'ｿ',
+	'ﾀ', 'ﾁ', 'ﾂ', 'ﾃ', 'ﾄ', 'ﾅ', 'ﾆ', 'ﾇ',
+	'ﾈ', 'ﾉ', 'ﾊ', 'ﾋ', 'ﾌ', 'ﾍ', 'ﾎ', 'ﾏ',
+	'ﾐ', 'ﾑ', 'ﾒ', 'ﾓ', 'ﾔ', 'ﾕ', 'ﾖ', 'ﾗ',
+	'ﾘ', 'ﾙ', 'ﾚ', 'ﾛ', 'ﾜ', 'ﾝ', 'ﾞ', 'ﾟ',
+	'α', 'ß', 'Γ', 'π', 'Σ', 'σ', 'µ', 'τ',
+	'Φ', 'Θ', 'Ω', 'δ', '∞', 'φ', 'ε', '∩',
+	'→', '←', '↓', '↑', '½', '¼', '★', '◊',
+	'㎏', '℔', '<27>', '×', '▾', '▴', '日', ' ',
+}
+
+var runesInternational = [256]rune{
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+	0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+	0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+	0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+	0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+	0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+	0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, '⌂',
+	'Ç', 'ü', 'é', 'â', 'ä', 'à', 'å', 'ç',
+	'ê', 'ë', 'è', 'ï', 'î', 'ì', 'Ä', 'Å',
+	'É', 'æ', 'Æ', 'ô', 'ö', 'ò', 'û', 'ù',
+	'ÿ', 'Ö', 'Ü', '¢', '£', '¥', '₧', 'ƒ',
+	'á', 'í', 'ó', 'ú', 'ñ', 'Ñ', 'ª', 'º',
+	'¿', '⌐', '¬', '½', '¼', '¡', '«', '»',
+	'░', '▒', '▓' - 1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, '█', '▄', '▌', '▐', '▀',
+	'α', 'ß', 'Γ', 'π', 'Σ', 'σ', 'µ', 'τ',
+	'Φ', 'Θ', 'Ω', 'δ', '∞', 'φ', 'ε', '∩',
+	'≡', '±', '≥', '≤', '⌠', '⌡', '÷', '≈',
+	'°', '∙', '·', '√', 'ⁿ', '²', '■', ' ',
+}
+
+var runesInternationalVariants = []string{
+	"#$@[\\]^`{|}~", // USA
+	"#$à·ç§^`éùè╍",  // France
+	"#$§ÄÖÜ^`äöüß",  // Germany
+	"£$@[\\]^`{|}~", // UK
+	"#$@ÆØÅ^`æøå~",  // Denmark 1
+	"#¤ÉÄÖÅÜéäöåü",  // Sweden
+	"#$@·\\é^ùàòèì", // Italy
+	"₧$@¡Ñ¿^`╍ñ}~",  // Spain
+	"#$@[¥]^`{|}~",  // Japan
+	"#¤ÉÆØÅÜéæøåü",  // Norway
+	"#$ÉÆØÅÜéæøåü",  // Denmark 2
+	"#$á¡Ñ¿é`íñóú",  // Spain 2
+	"#$á¡Ñ¿éüíñóú",  // Latin America
+}
+
+var internationalVariantsChars = []byte{
+	0x23, 0x24, 0x40, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x7B, 0x7C, 0x7D, 0x7E}
+
+// ResolveCharToRune tries to decode a character into a Unicode rune.
+// It may return rune(-1) if the character is deemed to have no representation.
+func ResolveCharToRune(char, charset uint8) rune {
+	if charset == 0x63 {
+		return runesJapan2[char]
+	}
+	if int(charset) >= len(runesInternationalVariants) {
+		return -1
+	}
+
+	for i, b := range internationalVariantsChars {
+		if char == b {
+			return []rune(runesInternationalVariants[charset])[i]
+		}
+	}
+	return runesInternational[char]
+}
+
+// ResolveRune tries to find a corresponding character for a Unicode rune.
+func ResolveRune(r rune, charset uint8) (uint8, bool) {
+	if charset == 0x63 {
+		for i, ch := range runesJapan2 {
+			if ch == r {
+				return uint8(i), true
+			}
+		}
+		return 0, false
+	}
+	if int(charset) >= len(runesInternationalVariants) {
+		return 0, false
+	}
+
+	variantRunes := []rune(runesInternationalVariants[charset])
+	for i, ch := range variantRunes {
+		if ch == r {
+			return internationalVariantsChars[i], true
+		}
+	}
+	for i, ch := range runesInternational {
+		if ch == r {
+			return uint8(i), true
+		}
+	}
+	return 0, false
+}
+
+//go:embed japan.png
+var pngJapan2 []byte
+var imageJapan2 image.Image
+
+//go:embed germany.png
+var pngGermany []byte
+var imageGermany image.Image
+
+//go:embed international.png
+var pngInternational []byte
+var imageInternational image.Image
+
+func init() {
+	var err error
+	imageJapan2, _, err = image.Decode(bytes.NewReader(pngJapan2))
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	imageGermany, _, err = image.Decode(bytes.NewReader(pngGermany))
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	imageInternational, _, err = image.Decode(bytes.NewReader(pngInternational))
+	if err != nil {
+		log.Fatalln(err)
+	}
+}
+
+// ResolveCharToImage tries to decode a character into a 5x7 bitmap image
+// (white on black).
+func ResolveCharToImage(char, charset uint8) image.Image {
+	const (
+		gridWidth  = 6
+		gridHeight = 8
+	)
+
+	var src image.Image
+	var col, row int
+	if charset == 0x63 {
+		src, col, row = imageJapan2, int(char)/16, int(char)%16
+	} else if int(charset) < len(runesInternationalVariants) {
+		src, col, row = imageGermany, int(char)/16, int(char)%16
+		for i, b := range internationalVariantsChars {
+			if char == b {
+				src, col, row = imageInternational, i, int(charset)
+			}
+		}
+	} else {
+		return nil
+	}
+
+	x0 := col * gridWidth
+	y0 := row * gridHeight
+	return src.(interface {
+		SubImage(r image.Rectangle) image.Image
+	}).SubImage(image.Rect(
+		x0,
+		y0,
+		x0+gridWidth-1,
+		y0+gridHeight-1,
+	))
+}

liust-50/cmd/liustatus/kaomoji.go

@@ -0,0 +1,242 @@
+package main
+
+import (
+	"math/rand"
+	"strings"
+	"time"
+)
+
+type kaomojiKind int
+
+const (
+	kaomojiKindAwake kaomojiKind = iota
+	kaomojiKindBlink
+	kaomojiKindFace
+	kaomojiKindChase
+	kaomojiKindHappy
+	kaomojiKindSleep
+	kaomojiKindSnore
+	kaomojiKindPeek
+)
+
+type kaomojiState struct {
+	kind    kaomojiKind
+	face    string
+	message string
+	delay   int
+}
+
+func (ks *kaomojiState) Format() string {
+	line := []rune(strings.Repeat(" ", displayWidth))
+
+	face := []rune(ks.face)
+	if x := (len(line) - len(face) + 1) / 2; x < 0 {
+		copy(line, face)
+	} else {
+		copy(line[x:], face)
+	}
+
+	if ks.message != "" {
+		copy(line[14:], []rune(ks.message))
+	}
+	return string(line)
+}
+
+func (ks *kaomojiState) Duration() time.Duration {
+	return time.Millisecond * time.Duration(ks.delay)
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+func kaomojiNewAwake() kaomojiState {
+	return kaomojiState{
+		kind:    kaomojiKindAwake,
+		face:    "(o_o)",
+		message: "",
+		delay:   2_000 + rand.Intn(4_000),
+	}
+}
+
+func kaomojiNewBlink() kaomojiState {
+	return kaomojiState{
+		kind:    kaomojiKindBlink,
+		face:    "(-_-)",
+		message: "",
+		delay:   100 + rand.Intn(50),
+	}
+}
+
+func kaomojiNewFace() kaomojiState {
+	faces := []struct {
+		face, message string
+	}{
+		{"(x_x)", "ｽﾞｷｽﾞｷ"},
+		{"(T_T)", "ｽﾞｰﾝ"},
+		{"=^.^=", "ﾆｬｰ"},
+		{"(>_<)", "ｹﾞｯﾌﾟ"},
+		{"(O_O)", "ｼﾞｰ"},
+	}
+
+	x := faces[rand.Intn(len(faces))]
+	return kaomojiState{
+		kind:    kaomojiKindFace,
+		face:    x.face,
+		message: x.message,
+		delay:   10_000,
+	}
+}
+
+func kaomojiNewChase() kaomojiState {
+	faces := []string{"(ﾟﾛﾟ)", "(ﾟ∩ﾟ)"}
+	return kaomojiState{
+		kind:    kaomojiKindChase,
+		face:    faces[rand.Intn(len(faces))],
+		message: "",
+		delay:   125,
+	}
+}
+
+func kaomojiNewHappy() kaomojiState {
+	return kaomojiState{
+		kind:    kaomojiKindHappy,
+		face:    "(^_^)",
+		message: "",
+		delay:   500,
+	}
+}
+
+func kaomojiNewSleep() kaomojiState {
+	return kaomojiState{
+		kind:    kaomojiKindSleep,
+		face:    "(-_-)",
+		message: "",
+		delay:   10_000,
+	}
+}
+
+func kaomojiNewSnore() kaomojiState {
+	return kaomojiState{
+		kind:    kaomojiKindSnore,
+		face:    "(-_-)",
+		message: "ｸﾞｰｸﾞｰ",
+		delay:   10_000,
+	}
+}
+
+func kaomojiNewPeek() kaomojiState {
+	faces := []string{"(o_-)", "(-_o)"}
+	return kaomojiState{
+		kind:    kaomojiKindPeek,
+		face:    faces[rand.Intn(len(faces))],
+		message: "",
+		delay:   3_000,
+	}
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+func kaomojiAnimateChase(state kaomojiState) (lines []string) {
+	// The main character is fixed and of fixed width.
+	var (
+		normal    = []rune("(o_o)")
+		alert     = []rune("(O_O)")
+		centre    = (displayWidth - 4) / 2
+		chaserLen = len([]rune(state.face))
+	)
+
+	// For simplicity, let the animation run off-screen.
+	for chaserX := chaserLen + displayWidth; chaserX >= 0; chaserX-- {
+		line := []rune(strings.Repeat(" ", chaserLen+displayWidth))
+
+		chased, chasedX := normal, chaserLen+centre
+		if chasedX > chaserX-7 {
+			chased, chasedX = alert, chaserX-7
+		}
+		if chasedX >= 0 {
+			copy(line[chasedX:], chased)
+		}
+
+		copy(line[chaserX:], []rune(state.face))
+		lines = append(lines, string(line[chaserLen:]))
+	}
+
+	// Return our main character back.
+	for chasedX := displayWidth; chasedX >= centre; chasedX-- {
+		line := []rune(strings.Repeat(" ", displayWidth))
+		copy(line[chasedX:], normal)
+		lines = append(lines, string(line))
+	}
+	return
+}
+
+func kaomojiProducer(lines chan<- string) {
+	state := kaomojiNewAwake()
+	execute := func() {
+		lines <- state.Format()
+		time.Sleep(state.Duration())
+	}
+
+	for {
+		switch state.kind {
+		case kaomojiKindAwake:
+			execute()
+			switch f := rand.Float32(); {
+			case f < 0.025:
+				state = kaomojiNewFace()
+			case f < 0.050:
+				state = kaomojiNewChase()
+			case f < 0.075:
+				state = kaomojiNewHappy()
+			case f < 0.100:
+				state = kaomojiNewSleep()
+			default:
+				state = kaomojiNewBlink()
+			}
+
+		case kaomojiKindBlink, kaomojiKindFace:
+			execute()
+			state = kaomojiNewAwake()
+
+		case kaomojiKindHappy:
+			face := state.face
+			execute()
+			state.face = "  " + face
+			execute()
+			state.face = face
+			execute()
+			state.face = face + "  "
+			execute()
+			state.face = face
+			execute()
+			state = kaomojiNewAwake()
+
+		case kaomojiKindChase:
+			for _, line := range kaomojiAnimateChase(state) {
+				lines <- line
+				time.Sleep(state.Duration())
+			}
+			state = kaomojiNewAwake()
+
+		case kaomojiKindSleep:
+			execute()
+			switch f := rand.Float32(); {
+			case f < 0.10:
+				state = kaomojiNewAwake()
+			case f < 0.20:
+				state = kaomojiNewPeek()
+			case f < 0.60:
+				state = kaomojiNewSnore()
+			default:
+				state = kaomojiNewSleep()
+			}
+
+		case kaomojiKindSnore:
+			execute()
+			state = kaomojiNewSleep()
+
+		case kaomojiKindPeek:
+			execute()
+			state = kaomojiNewSleep()
+		}
+	}
+}

liust-50/cmd/liustatus/status.go

@@ -0,0 +1,146 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"strings"
+	"time"
+
+	"janouch.name/desktop-tools/liust-50/charset"
+)
+
+const (
+	displayWidth  = 20
+	displayHeight = 2
+	targetCharset = 0x63
+)
+
+type DisplayState struct {
+	Display [displayHeight][displayWidth]uint8
+}
+
+type Display struct {
+	Current, Last DisplayState
+}
+
+func NewDisplay() *Display {
+	t := &Display{}
+	for y := 0; y < displayHeight; y++ {
+		for x := 0; x < displayWidth; x++ {
+			t.Current.Display[y][x] = ' '
+			t.Last.Display[y][x] = ' '
+		}
+	}
+	return t
+}
+
+func (t *Display) SetLine(row int, content string) {
+	if row < 0 || row >= displayHeight {
+		return
+	}
+
+	runes := []rune(content)
+	for x := 0; x < displayWidth; x++ {
+		if x < len(runes) {
+			b, ok := charset.ResolveRune(runes[x], targetCharset)
+			if ok {
+				t.Current.Display[row][x] = b
+			} else {
+				t.Current.Display[row][x] = '?'
+			}
+		} else {
+			t.Current.Display[row][x] = ' '
+		}
+	}
+}
+
+func (t *Display) HasChanges() bool {
+	for y := 0; y < displayHeight; y++ {
+		for x := 0; x < displayWidth; x++ {
+			if t.Current.Display[y][x] != t.Last.Display[y][x] {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func (t *Display) Update() {
+	for y := 0; y < displayHeight; y++ {
+		start := -1
+		for x := 0; x < displayWidth; x++ {
+			if t.Current.Display[y][x] != t.Last.Display[y][x] {
+				start = x
+				break
+			}
+		}
+		if start >= 0 {
+			fmt.Printf("\x1b[%d;%dH%s",
+				y+1, start+1, []byte(t.Current.Display[y][start:]))
+			copy(t.Last.Display[y][start:], t.Current.Display[y][start:])
+		}
+	}
+}
+
+func statusProducer(lines chan<- string) {
+	ticker := time.NewTicker(1 * time.Second)
+	defer ticker.Stop()
+
+	temperature, fetcher := "", NewWeatherFetcher()
+	temperatureChan := make(chan string)
+	go fetcher.Run(5*time.Minute, temperatureChan)
+
+	for {
+		select {
+		case newTemperature := <-temperatureChan:
+			temperature = newTemperature
+		default:
+		}
+
+		now := time.Now()
+		status := fmt.Sprintf("%s %3s %s",
+			now.Format("Mon _2 Jan"), temperature, now.Format("15:04"))
+
+		// Ensure exactly 20 characters.
+		runes := []rune(status)
+		if len(runes) > displayWidth {
+			status = string(runes[:displayWidth])
+		} else if len(runes) < displayWidth {
+			status = status + strings.Repeat(" ", displayWidth-len(runes))
+		}
+
+		lines <- status
+		<-ticker.C
+	}
+}
+
+func main() {
+	rand.Seed(time.Now().UTC().UnixNano())
+	terminal := NewDisplay()
+
+	kaomojiChan := make(chan string, 1)
+	statusChan := make(chan string, 1)
+	go func() {
+		kaomojiChan <- strings.Repeat(" ", displayWidth)
+		statusChan <- strings.Repeat(" ", displayWidth)
+	}()
+
+	go kaomojiProducer(kaomojiChan)
+	go statusProducer(statusChan)
+
+	// TODO(p): And we might want to disable cursor visibility as well.
+	fmt.Printf("\x1bR%c", targetCharset)
+	fmt.Print("\x1b[2J") // Clear display
+
+	for {
+		select {
+		case line := <-kaomojiChan:
+			terminal.SetLine(0, line)
+		case line := <-statusChan:
+			terminal.SetLine(1, line)
+		}
+		if terminal.HasChanges() {
+			terminal.Update()
+		}
+	}
+}

liust-50/cmd/liustatus/weather.go

@@ -0,0 +1,132 @@
+package main
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+const (
+	baseURL   = "https://api.met.no/weatherapi"
+	userAgent = "liustatus/1.0"
+
+	// Prague coordinates.
+	lat      = 50.08804
+	lon      = 14.42076
+	altitude = 202
+)
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+type Weatherdata struct {
+	XMLName xml.Name `xml:"weatherdata"`
+	Product Product  `xml:"product"`
+}
+
+type Product struct {
+	Times []Time `xml:"time"`
+}
+
+type Time struct {
+	From     string   `xml:"from,attr"`
+	To       string   `xml:"to,attr"`
+	Location Location `xml:"location"`
+}
+
+type Location struct {
+	Temperature *Temperature `xml:"temperature"`
+}
+
+type Temperature struct {
+	Unit  string `xml:"unit,attr"`
+	Value string `xml:"value,attr"`
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+// WeatherFetcher handles weather data retrieval.
+type WeatherFetcher struct {
+	client *http.Client
+}
+
+// NewWeatherFetcher creates a new weather fetcher instance.
+func NewWeatherFetcher() *WeatherFetcher {
+	return &WeatherFetcher{
+		client: &http.Client{Timeout: 30 * time.Second},
+	}
+}
+
+// fetchWeather retrieves the current temperature from the API.
+func (w *WeatherFetcher) fetchWeather() (string, error) {
+	url := fmt.Sprintf(
+		"%s/locationforecast/2.0/classic?lat=%.5f&lon=%.5f&altitude=%d",
+		baseURL, lat, lon, altitude)
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return "", err
+	}
+
+	req.Header.Set("User-Agent", userAgent)
+
+	resp, err := w.client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("API returned status %d", resp.StatusCode)
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	var weatherData Weatherdata
+	if err := xml.Unmarshal(body, &weatherData); err != nil {
+		return "", err
+	}
+
+	now := time.Now().UTC()
+	for _, t := range weatherData.Product.Times {
+		toTime, err := time.Parse("2006-01-02T15:04:05Z", t.To)
+		if err != nil || toTime.Before(now) {
+			continue
+		}
+		if t.Location.Temperature != nil {
+			temp, err := strconv.ParseFloat(t.Location.Temperature.Value, 64)
+			if err != nil {
+				continue
+			}
+			return fmt.Sprintf("%dﾟ", int(temp)), nil
+		}
+	}
+
+	return "", fmt.Errorf("no usable temperature data found")
+}
+
+// update fetches new weather data and returns it.
+func (w *WeatherFetcher) update() string {
+	temp, err := w.fetchWeather()
+	if err != nil {
+		log.Printf("Error fetching weather: %v", err)
+	}
+	return temp
+}
+
+// Run runs as a goroutine to periodically fetch weather data.
+func (w *WeatherFetcher) Run(interval time.Duration, output chan<- string) {
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	output <- w.update()
+	for range ticker.C {
+		output <- w.update()
+	}
+}

liust-50/cmd/liustsim/simulator.go

@@ -0,0 +1,411 @@
+package main
+
+import (
+	"bufio"
+	"image"
+	"image/color"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/app"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+
+	"janouch.name/desktop-tools/liust-50/charset"
+)
+
+// --- Display emulation -------------------------------------------------------
+
+const (
+	displayWidth  = 20
+	displayHeight = 2
+	charWidth     = 5 + 1
+	charHeight    = 7 + 1
+)
+
+// TODO(p): See how this works exactly, and implement it.
+const (
+	cursorModeOff = iota
+	cursorModeBlink
+	cursorModeLightUp
+)
+
+type Display struct {
+	chars      [displayHeight][displayWidth]uint8
+	charset    uint8
+	cursorX    int
+	cursorY    int
+	cursorMode int
+}
+
+func NewDisplay() *Display {
+	return &Display{charset: 2}
+}
+
+func (d *Display) Clear() {
+	for y := 0; y < displayHeight; y++ {
+		for x := 0; x < displayWidth; x++ {
+			d.chars[y][x] = 0x20 // space
+		}
+	}
+}
+
+func (d *Display) ClearToEnd() {
+	for x := d.cursorX; x < displayWidth; x++ {
+		d.chars[d.cursorY][x] = 0x20 // space
+	}
+}
+
+func (d *Display) drawCharacter(
+	img *image.RGBA, character image.Image, cx, cy int) {
+	if character == nil {
+		return
+	}
+
+	bounds := character.Bounds()
+	width, height := bounds.Dx(), bounds.Dy()
+	for dy := 0; dy < height; dy++ {
+		for dx := 0; dx < width; dx++ {
+			var c color.RGBA
+			if r, _, _, _ := character.At(
+				bounds.Min.X+dx, bounds.Min.Y+dy).RGBA(); r >= 0x8000 {
+				c = color.RGBA{0x00, 0xFF, 0xB0, 0xFF}
+			} else {
+				c = color.RGBA{0x18, 0x18, 0x18, 0xFF}
+			}
+			img.SetRGBA(1+cx*charWidth+dx, 1+cy*charHeight+dy, c)
+		}
+	}
+}
+
+func (d *Display) Render() image.Image {
+	width := 1 + displayWidth*charWidth
+	height := 1 + displayHeight*charHeight
+
+	// XXX: Not sure if we rather don't want to provide double buffering,
+	// meaning we would cycle between two internal buffers.
+	img := image.NewRGBA(image.Rect(0, 0, width, height))
+
+	black := [4]uint8{0x00, 0x00, 0x00, 0xFF}
+	for y := 0; y < height; y++ {
+		for x := 0; x < width; x++ {
+			copy(img.Pix[img.PixOffset(x, y):], black[:])
+		}
+	}
+
+	for cy := 0; cy < displayHeight; cy++ {
+		for cx := 0; cx < displayWidth; cx++ {
+			charImg := charset.ResolveCharToImage(d.chars[cy][cx], d.charset)
+			d.drawCharacter(img, charImg, cx, cy)
+		}
+	}
+	return img
+}
+
+func (d *Display) PutChar(ch uint8) {
+	if d.cursorX >= displayWidth || d.cursorY >= displayHeight {
+		return
+	}
+
+	d.chars[d.cursorY][d.cursorX] = ch
+	d.cursorX++
+	if d.cursorX >= displayWidth {
+		d.cursorX = displayWidth - 1
+	}
+}
+
+func (d *Display) LineFeed() {
+	d.cursorY++
+	if d.cursorY >= displayHeight {
+		d.cursorY = displayHeight - 1
+
+		y := 0
+		for ; y < displayHeight-1; y++ {
+			d.chars[y] = d.chars[y+1]
+		}
+		for x := 0; x < displayWidth; x++ {
+			d.chars[y][x] = 0x20
+		}
+	}
+}
+
+func (d *Display) CarriageReturn() {
+	d.cursorX = 0
+}
+
+func (d *Display) Backspace() {
+	if d.cursorX > 0 {
+		d.cursorX--
+	}
+}
+
+func (d *Display) SetCursor(x, y int) {
+	if x >= 0 && x < displayWidth {
+		d.cursorX = x
+	}
+	if y >= 0 && y < displayHeight {
+		d.cursorY = y
+	}
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+func parseANSI(input string) (command string, params []int) {
+	if !strings.HasPrefix(input, "\x1b[") {
+		return "", nil
+	}
+
+	input = input[2:]
+	if len(input) == 0 {
+		return "", nil
+	}
+
+	cmdIdx := len(input) - 1
+	paramStr, command := input[:cmdIdx], input[cmdIdx:]
+	if paramStr != "" {
+		for _, p := range strings.Split(paramStr, ";") {
+			if p = strings.TrimSpace(p); p == "" {
+				params = append(params, 0)
+			} else if value, err := strconv.Atoi(p); err == nil {
+				params = append(params, value)
+			}
+		}
+	}
+	return command, params
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+type protocolParser struct {
+	seq     strings.Builder
+	inEsc   bool
+	inCSI   bool
+	display *Display
+}
+
+func newProtocolParser(d *Display) *protocolParser {
+	return &protocolParser{display: d}
+}
+
+func (pp *protocolParser) reset() {
+	pp.inEsc = false
+	pp.inCSI = false
+	pp.seq.Reset()
+}
+
+func (pp *protocolParser) handleCSICommand() bool {
+	cmd, params := parseANSI(pp.seq.String())
+
+	switch cmd {
+	case "J": // Clear display
+		// XXX: The no params case is unverified.
+		if len(params) == 0 || params[0] == 2 {
+			pp.display.Clear()
+		}
+	case "K": // Delete to end of line
+		// XXX: The no params case is unverified (but it should work).
+		if len(params) == 0 || params[0] == 0 {
+			pp.display.ClearToEnd()
+		}
+	case "H": // Cursor position
+		y, x := 0, 0
+		if len(params) >= 1 {
+			y = params[0] - 1 // 1-indexed to 0-indexed
+		}
+		if len(params) >= 2 {
+			x = params[1] - 1
+		}
+		pp.display.SetCursor(x, y)
+	}
+	return true
+}
+
+func (pp *protocolParser) handleEscapeSequence(b byte) bool {
+	pp.seq.WriteByte(b)
+
+	if pp.seq.Len() == 2 && b == '[' {
+		pp.inCSI = true
+		return false
+	}
+
+	if pp.seq.Len() == 3 && pp.seq.String()[1] == 'R' {
+		pp.display.charset = b
+		pp.reset()
+		return true
+	}
+
+	if pp.inCSI && (b >= 'A' && b <= 'Z' || b >= 'a' && b <= 'z') {
+		refresh := pp.handleCSICommand()
+		pp.reset()
+		return refresh
+	}
+
+	if pp.seq.Len() == 6 && pp.seq.String()[1:5] == "\\?LC" {
+		pp.display.cursorMode = int(pp.seq.String()[5])
+		return true
+	}
+
+	return false
+}
+
+func (pp *protocolParser) handleCharacter(b byte) bool {
+	switch b {
+	case 0x0A: // LF
+		pp.display.LineFeed()
+		return true
+	case 0x0D: // CR
+		pp.display.CarriageReturn()
+		return true
+	case 0x08: // BS
+		pp.display.Backspace()
+		return true
+	default:
+		if b >= 0x20 {
+			pp.display.PutChar(b)
+			return true
+		}
+	}
+	return false
+}
+
+func (pp *protocolParser) handleByte(b byte) (needsRefresh bool) {
+	if b == 0x1b { // ESC
+		pp.reset()
+		pp.inEsc = true
+		pp.seq.WriteByte(b)
+		return false
+	}
+	if pp.inEsc {
+		return pp.handleEscapeSequence(b)
+	}
+
+	return pp.handleCharacter(b)
+}
+
+// --- Display widget ----------------------------------------------------------
+
+type DisplayRenderer struct {
+	image *canvas.Image
+	label *canvas.Text
+
+	objects       []fyne.CanvasObject
+	displayWidget *DisplayWidget
+}
+
+func (r *DisplayRenderer) Destroy() {}
+
+func (r *DisplayRenderer) Layout(size fyne.Size) {
+	minSize := r.MinSize()
+	aspectRatio := minSize.Width / minSize.Height
+
+	var areaX, areaY, areaWidth, areaHeight float32
+	if size.Width/size.Height > aspectRatio {
+		areaHeight = size.Height
+		areaWidth = areaHeight * aspectRatio
+		areaX = (size.Width - areaWidth) / 2
+	} else {
+		areaWidth = size.Width
+		areaHeight = areaWidth / aspectRatio
+		areaY = (size.Height - areaHeight) / 2
+	}
+
+	imageHeight := areaHeight * (minSize.Height - 5) / minSize.Height
+	r.image.Move(fyne.NewPos(areaX, areaY))
+	r.image.Resize(fyne.NewSize(areaWidth, imageHeight))
+
+	// The appropriate TextSize for the desired label height is guesswork.
+	// In theory, we could figure out the relation between TextSize
+	// and measured height in our MinSize.
+	r.label.TextSize = (areaHeight - imageHeight) * 0.75
+	labelSize := r.label.MinSize()
+
+	// The VFD display is not mounted exactly in the centre of the device.
+	r.label.Move(fyne.NewPos(
+		areaX+(areaWidth-labelSize.Width)*0.525,
+		areaY+imageHeight))
+	r.label.Resize(labelSize)
+}
+
+func (r *DisplayRenderer) MinSize() fyne.Size {
+	// The VFD display doesn't have rectangular pixels,
+	// they are rather elongated in a roughly 3:4 ratio.
+	//
+	// Add space for the bottom label.
+	bounds := r.image.Image.Bounds()
+	return fyne.NewSize(float32(bounds.Dx()), float32(bounds.Dy())*1.25).
+		AddWidthHeight(0, 5)
+}
+
+func (r *DisplayRenderer) Objects() []fyne.CanvasObject { return r.objects }
+
+func (r *DisplayRenderer) Refresh() {
+	r.image.Image = r.displayWidget.display.Render()
+	r.image.Refresh()
+	r.label.Refresh()
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+type DisplayWidget struct {
+	widget.BaseWidget
+	display *Display
+}
+
+func NewDisplayWidget(display *Display) *DisplayWidget {
+	dw := &DisplayWidget{display: display}
+	dw.ExtendBaseWidget(dw)
+	return dw
+}
+
+func (dw *DisplayWidget) CreateRenderer() fyne.WidgetRenderer {
+	image := canvas.NewImageFromImage(dw.display.Render())
+	image.ScaleMode = canvas.ImageScalePixels
+
+	label := canvas.NewText("TOSHIBA", color.Gray{0x99})
+	label.TextStyle.Bold = true
+
+	return &DisplayRenderer{
+		image:         image,
+		label:         label,
+		objects:       []fyne.CanvasObject{image, label},
+		displayWidget: dw,
+	}
+}
+
+// --- Main --------------------------------------------------------------------
+
+func main() {
+	a := app.New()
+	a.Settings().SetTheme(theme.DarkTheme())
+	window := a.NewWindow("Toshiba Tec LIUST-50 Simulator")
+
+	display := NewDisplay()
+	display.Clear()
+
+	dw := NewDisplayWidget(display)
+	window.SetContent(dw)
+	window.Resize(fyne.NewSize(600, 150))
+
+	go func() {
+		reader := bufio.NewReader(os.Stdin)
+		parser := newProtocolParser(display)
+
+		for {
+			b, err := reader.ReadByte()
+			if err != nil {
+				log.Println(err)
+				return
+			}
+
+			if parser.handleByte(b) {
+				fyne.DoAndWait(func() { dw.Refresh() })
+			}
+		}
+	}()
+
+	window.ShowAndRun()
+}

liust-50/go.mod

@@ -0,0 +1,40 @@
+module janouch.name/desktop-tools/liust-50
+
+go 1.25.1
+
+require fyne.io/fyne/v2 v2.7.1
+
+require (
+	fyne.io/systray v1.11.1-0.20250603113521-ca66a66d8b58 // indirect
+	github.com/BurntSushi/toml v1.5.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/fredbi/uri v1.1.1 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/fyne-io/gl-js v0.2.0 // indirect
+	github.com/fyne-io/glfw-js v0.3.0 // indirect
+	github.com/fyne-io/image v0.1.1 // indirect
+	github.com/fyne-io/oksvg v0.2.0 // indirect
+	github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 // indirect
+	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728 // indirect
+	github.com/go-text/render v0.2.0 // indirect
+	github.com/go-text/typesetting v0.3.0 // indirect
+	github.com/godbus/dbus/v5 v5.2.0 // indirect
+	github.com/hack-pad/go-indexeddb v0.3.2 // indirect
+	github.com/hack-pad/safejs v0.1.1 // indirect
+	github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade // indirect
+	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect
+	github.com/kr/text v0.1.0 // indirect
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
+	github.com/nicksnyder/go-i18n/v2 v2.6.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rymdport/portal v0.4.2 // indirect
+	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect
+	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
+	github.com/yuin/goldmark v1.7.13 // indirect
+	golang.org/x/image v0.33.0 // indirect
+	golang.org/x/net v0.47.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/text v0.31.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

liust-50/go.sum

@@ -0,0 +1,80 @@
+fyne.io/fyne/v2 v2.7.1 h1:ja7rNHWWEooha4XBIZNnPP8tVFwmTfwMJdpZmLxm2Zc=
+fyne.io/fyne/v2 v2.7.1/go.mod h1:xClVlrhxl7D+LT+BWYmcrW4Nf+dJTvkhnPgji7spAwE=
+fyne.io/systray v1.11.1-0.20250603113521-ca66a66d8b58 h1:eA5/u2XRd8OUkoMqEv3IBlFYSruNlXD8bRHDiqm0VNI=
+fyne.io/systray v1.11.1-0.20250603113521-ca66a66d8b58/go.mod h1:RVwqP9nYMo7h5zViCBHri2FgjXF7H2cub7MAq4NSoLs=
+github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
+github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/felixge/fgprof v0.9.3 h1:VvyZxILNuCiUCSXtPtYmmtGvb65nqXh2QFWc0Wpf2/g=
+github.com/felixge/fgprof v0.9.3/go.mod h1:RdbpDgzqYVh/T9fPELJyV7EYJuHB55UTEULNun8eiPw=
+github.com/fredbi/uri v1.1.1 h1:xZHJC08GZNIUhbP5ImTHnt5Ya0T8FI2VAwI/37kh2Ko=
+github.com/fredbi/uri v1.1.1/go.mod h1:4+DZQ5zBjEwQCDmXW5JdIjz0PUA+yJbvtBv+u+adr5o=
+github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
+github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
+github.com/fyne-io/gl-js v0.2.0 h1:+EXMLVEa18EfkXBVKhifYB6OGs3HwKO3lUElA0LlAjs=
+github.com/fyne-io/gl-js v0.2.0/go.mod h1:ZcepK8vmOYLu96JoxbCKJy2ybr+g1pTnaBDdl7c3ajI=
+github.com/fyne-io/glfw-js v0.3.0 h1:d8k2+Y7l+zy2pc7wlGRyPfTgZoqDf3AI4G+2zOWhWUk=
+github.com/fyne-io/glfw-js v0.3.0/go.mod h1:Ri6te7rdZtBgBpxLW19uBpp3Dl6K9K/bRaYdJ22G8Jk=
+github.com/fyne-io/image v0.1.1 h1:WH0z4H7qfvNUw5l4p3bC1q70sa5+YWVt6HCj7y4VNyA=
+github.com/fyne-io/image v0.1.1/go.mod h1:xrfYBh6yspc+KjkgdZU/ifUC9sPA5Iv7WYUBzQKK7JM=
+github.com/fyne-io/oksvg v0.2.0 h1:mxcGU2dx6nwjJsSA9PCYZDuoAcsZ/OuJlvg/Q9Njfo8=
+github.com/fyne-io/oksvg v0.2.0/go.mod h1:dJ9oEkPiWhnTFNCmRgEze+YNprJF7YRbpjgpWS4kzoI=
+github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 h1:5BVwOaUSBTlVZowGO6VZGw2H/zl9nrd3eCZfYV+NfQA=
+github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71/go.mod h1:9YTyiznxEY1fVinfM7RvRcjRHbw2xLBJ3AAGIT0I4Nw=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728 h1:RkGhqHxEVAvPM0/R+8g7XRwQnHatO0KAuVcwHo8q9W8=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728/go.mod h1:SyRD8YfuKk+ZXlDqYiqe1qMSqjNgtHzBTG810KUagMc=
+github.com/go-text/render v0.2.0 h1:LBYoTmp5jYiJ4NPqDc2pz17MLmA3wHw1dZSVGcOdeAc=
+github.com/go-text/render v0.2.0/go.mod h1:CkiqfukRGKJA5vZZISkjSYrcdtgKQWRa2HIzvwNN5SU=
+github.com/go-text/typesetting v0.3.0 h1:OWCgYpp8njoxSRpwrdd1bQOxdjOXDj9Rqart9ML4iF4=
+github.com/go-text/typesetting v0.3.0/go.mod h1:qjZLkhRgOEYMhU9eHBr3AR4sfnGJvOXNLt8yRAySFuY=
+github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066 h1:qCuYC+94v2xrb1PoS4NIDe7DGYtLnU2wWiQe9a1B1c0=
+github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066/go.mod h1:DDxDdQEnB70R8owOx3LVpEFvpMK9eeH1o2r0yZhFI9o=
+github.com/godbus/dbus/v5 v5.2.0 h1:3WexO+U+yg9T70v9FdHr9kCxYlazaAXUhx2VMkbfax8=
+github.com/godbus/dbus/v5 v5.2.0/go.mod h1:3AAv2+hPq5rdnr5txxxRwiGjPXamgoIHgz9FPBfOp3c=
+github.com/google/pprof v0.0.0-20211214055906-6f57359322fd h1:1FjCyPC+syAzJ5/2S8fqdZK1R22vvA0J7JZKcuOIQ7Y=
+github.com/google/pprof v0.0.0-20211214055906-6f57359322fd/go.mod h1:KgnwoLYCZ8IQu3XUZ8Nc/bM9CCZFOyjUNOSygVozoDg=
+github.com/hack-pad/go-indexeddb v0.3.2 h1:DTqeJJYc1usa45Q5r52t01KhvlSN02+Oq+tQbSBI91A=
+github.com/hack-pad/go-indexeddb v0.3.2/go.mod h1:QvfTevpDVlkfomY498LhstjwbPW6QC4VC/lxYb0Kom0=
+github.com/hack-pad/safejs v0.1.1 h1:d5qPO0iQ7h2oVtpzGnLExE+Wn9AtytxIfltcS2b9KD8=
+github.com/hack-pad/safejs v0.1.1/go.mod h1:HdS+bKF1NrE72VoXZeWzxFOVQVUSqZJAG0xNCnb+Tio=
+github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade h1:FmusiCI1wHw+XQbvL9M+1r/C3SPqKrmBaIOYwVfQoDE=
+github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade/go.mod h1:ZDXo8KHryOWSIqnsb/CiDq7hQUYryCgdVnxbj8tDG7o=
+github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 h1:YLvr1eE6cdCqjOe972w/cYF+FjW34v27+9Vo5106B4M=
+github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25/go.mod h1:kLgvv7o6UM+0QSf0QjAse3wReFDsb9qbZJdfexWlrQw=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
+github.com/nicksnyder/go-i18n/v2 v2.6.0 h1:C/m2NNWNiTB6SK4Ao8df5EWm3JETSTIGNXBpMJTxzxQ=
+github.com/nicksnyder/go-i18n/v2 v2.6.0/go.mod h1:88sRqr0C6OPyJn0/KRNaEz1uWorjxIKP7rUUcvycecE=
+github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
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+github.com/pkg/profile v1.7.0 h1:hnbDkaNWPCLMO9wGLdBFTIZvzDrDfBM2072E1S9gJkA=
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+golang.org/x/image v0.33.0 h1:LXRZRnv1+zGd5XBUVRFmYEphyyKJjQjCRiOuAP3sZfQ=
+golang.org/x/image v0.33.0/go.mod h1:DD3OsTYT9chzuzTQt+zMcOlBHgfoKQb1gry8p76Y1sc=
+golang.org/x/net v0.47.0 h1:Mx+4dIFzqraBXUugkia1OOvlD6LemFo1ALMHjrXDOhY=
+golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.31.0 h1:aC8ghyu4JhP8VojJ2lEHBnochRno1sgL6nEi9WGFGMM=
+golang.org/x/text v0.31.0/go.mod h1:tKRAlv61yKIjGGHX/4tP1LTbc13YSec1pxVEWXzfoeM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

wmstatus.c

@@ -1,7 +1,7 @@
 /*
  * wmstatus.c: simple PulseAudio-enabled status setter for dwm and i3/sway
  *
- * Copyright (c) 2015 - 2024, Přemysl Eric Janouch <p@janouch.name>
+ * Copyright (c) 2015 - 2025, 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.
@@ -798,6 +798,10 @@ backend_i3_new (void)
 
 static const struct config_schema g_config_general[] =
 {
+	{ .name      = "time_format",
+	  .comment   = "strftime format specification string",
+	  .type      = CONFIG_ITEM_STRING,
+	  .default_  = "\"Week %V, %a %d %b %Y %H:%M %Z\"" },
 	{ .name      = "command",
 	  .comment   = "Command to run for more info",
 	  .type      = CONFIG_ITEM_STRING },
@@ -809,10 +813,10 @@ static const struct config_schema g_config_general[] =
 
 static const struct config_schema g_config_mpd[] =
 {
+	// XXX: We might want to allow config item defaults to not disable nulls.
 	{ .name      = "address",
 	  .comment   = "MPD host or socket",
-	  .type      = CONFIG_ITEM_STRING,
-	  .default_  = "\"localhost\"" },
+	  .type      = CONFIG_ITEM_STRING },
 	{ .name      = "service",
 	  .comment   = "MPD service name or port",
 	  .type      = CONFIG_ITEM_STRING,
@@ -1375,7 +1379,7 @@ make_time_status (const char *fmt)
 
 	if (local == NULL)
 		exit_fatal ("%s: %s", "localtime", strerror (errno));
-	if (!strftime (buf, sizeof buf, fmt, local))
+	if (*fmt && !strftime (buf, sizeof buf, fmt, local))
 		exit_fatal ("strftime == 0");
 
 	return xstrdup (buf);
@@ -1447,8 +1451,10 @@ refresh_status (struct app_context *ctx)
 	for (size_t i = 0; i < ctx->command_current.len; i++)
 		ctx->backend->add (ctx->backend, ctx->command_current.vector[i]);
 
-	char *times = make_time_status ("Week %V, %a %d %b %Y %H:%M %Z");
-	ctx->backend->add (ctx->backend, times);
+	char *times = make_time_status
+		(get_config_string (ctx->config.root, "general.time_format"));
+	if (*times)
+		ctx->backend->add (ctx->backend, times);
 	free (times);
 
 	ctx->backend->flush (ctx->backend);
@@ -1809,8 +1815,12 @@ mpd_on_io_hook (void *user_data, bool outgoing, const char *line)
 static void
 on_mpd_reconnect (void *user_data)
 {
-	// FIXME: the user should be able to disable MPD
 	struct app_context *ctx = user_data;
+	struct config_item *root = ctx->config.root;
+	const char *address = get_config_string (root, "mpd.address");
+	const char *service = get_config_string (root, "mpd.service");
+	if (!address)
+		return;
 
 	struct mpd_client *c = &ctx->mpd_client;
 	c->user_data    = ctx;
@@ -1820,10 +1830,7 @@ on_mpd_reconnect (void *user_data)
 	c->on_io_hook   = mpd_on_io_hook;
 
 	struct error *e = NULL;
-	struct config_item *root = ctx->config.root;
-	if (!mpd_client_connect (&ctx->mpd_client,
-		get_config_string (root, "mpd.address"),
-		get_config_string (root, "mpd.service"), &e))
+	if (!mpd_client_connect (&ctx->mpd_client, address, service, &e))
 	{
 		print_error ("%s: %s", "cannot connect to MPD", e->message);
 		error_free (e);