Mercurial > dovecot > original-hg > dovecot-1.2
view src/lib/lib-signals.c @ 100:867ec80dbf42 HEAD
Custom flags are now shown in FLAGS and PERMANENTFLAGS lists after SELECT.
It also warns if there's for some reason a duplicate index number in custom
flags file.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Thu, 29 Aug 2002 22:21:51 +0300 |
parents | 3b1985cbc908 |
children | 5b20fb38ac92 |
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/* lib-signals.c : Handling of commonly used signals Copyright (c) 2001-2002 Timo Sirainen Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "lib.h" #include "lib-signals.h" #include <stdio.h> #include <signal.h> int lib_signal_hup, lib_signal_kill; static void (*quit_handler) (int); static void sig_hup(int signo) { #ifndef HAVE_SIGACTION /* some systems may have changed the signal handler to default one */ signal(SIGHUP, sig_hup); #endif lib_signal_hup = signo; } static void sig_quit(int signo) { /* if we get killed after this, just die instead of coming back here. */ signal(SIGINT, SIG_DFL); signal(SIGTERM, SIG_DFL); /* quit the I/O loop, deinitialization is be done properly */ lib_signal_kill = signo; quit_handler(signo); } void lib_init_signals(void (*sig_quit_handler) (int)) { #ifdef HAVE_SIGACTION struct sigaction act; #endif lib_signal_kill = 0; lib_signal_hup = 0; quit_handler = sig_quit_handler; /* signal() behaviour is a bit inconsistent between systems after the signal handler has been called. If the signal isn't ignored, or your handler doesn't kill the program, sigaction() should be used. */ #ifdef HAVE_SIGACTION sigemptyset(&act.sa_mask); act.sa_flags = 0; act.sa_handler = sig_hup; sigaction(SIGHUP, &act, NULL); #else signal(SIGHUP, sig_hup); #endif /* these signals should be called only once, so it's safe to use signal() */ signal(SIGINT, sig_quit); signal(SIGTERM, sig_quit); signal(SIGPIPE, SIG_IGN); }