From 9f0ef4953d153aaed45166050797e97545b96954 Mon Sep 17 00:00:00 2001
From: Paul LeoNerd Evans <leonerd@leonerd.org.uk>
Date: Wed, 23 Mar 2011 23:20:24 +0000
Subject: [PATCH] Don't steal Ctrl-C from the kernel by default (so leave
 SIGINT enabled); add a flag to take it if required

---
 termkey.c     | 7 ++++++-
 termkey.h.in  | 1 +
 termkey_new.3 | 3 +++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/termkey.c b/termkey.c
index 6b8b8ee..bfd577f 100644
--- a/termkey.c
+++ b/termkey.c
@@ -278,7 +278,12 @@ static TermKey *termkey_new_full(int fd, int flags, size_t buffsize, int waittim
       tk->restore_termios_valid = 1;
 
       termios.c_iflag &= ~(IXON|INLCR|ICRNL);
-      termios.c_lflag &= ~(ICANON|ECHO|ISIG);
+      termios.c_lflag &= ~(ICANON|ECHO);
+
+      termios.c_cc[VQUIT] = 0;
+      termios.c_cc[VSUSP] = 0;
+      if(flags & TERMKEY_FLAG_CTRLC)
+        termios.c_cc[VINTR] = 0;
 
       tcsetattr(fd, TCSANOW, &termios);
     }
diff --git a/termkey.h.in b/termkey.h.in
index 8e3cad1..0cfbb52 100644
--- a/termkey.h.in
+++ b/termkey.h.in
@@ -139,6 +139,7 @@ enum {
   TERMKEY_FLAG_UTF8        = 1 << 3, // Input is definitely UTF-8
   TERMKEY_FLAG_NOTERMIOS   = 1 << 4, // Do not make initial termios calls on construction
   TERMKEY_FLAG_SPACESYMBOL = 1 << 5, // Space is symbolic rather than Unicode
+  TERMKEY_FLAG_CTRLC       = 1 << 6, // Allow Ctrl-C to be read as normal, disabling SIGINT
 };
 
 void termkey_check_version(int major, int minor);
diff --git a/termkey_new.3 b/termkey_new.3
index c1742fc..38e23b8 100644
--- a/termkey_new.3
+++ b/termkey_new.3
@@ -41,6 +41,9 @@ device, do not call the \fBtcsetattr\fP() \fBtermios\fP function on it to set it
 .TP
 .B TERMKEY_FLAG_SPACESYMBOL
 Report space as being a symbolic key rather than a Unicode codepoint.
+.TP
+.B TERMKEY_FLAG_CTRLC
+Disable the \fBSIGINT\fP behaviour of \fICtrl-C\fP. If this flag is provided, then \fICtrl-C\fP will be available as a normal keypress, rather than sending the process group a \fBSIGINT\fP. This flag only takes effect without \fBTERMKEY_FLAG_NOTERMIOS\fP; with it, none of the signal keys are disabled anyway.
 .PP
 When the constructor is invoked, it attempts to detect if the current locale is UTF-8 aware or not, and sets either the \fBTERMKEY_FLAG_UTF8\fP or \fBTERMKEY_FLAG_RAW\fP flag. One of these two bits will always be in effect. The current flags in effect can be obtained by \fBtermkey_get_flags\fP().
 .SH VERSION CHECK MACRO