60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* signals.c - abstracts signal handling
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* Time-stamp: <2010-11-01 17:25:41 nk>
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*
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* (c) 2004-2010 Nicholas J. Kain <njkain at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <unistd.h>
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#include <signal.h>
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#include <stdlib.h>
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#include "log.h"
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void hook_signal(int signum, void (*fn)(int), int flags) {
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struct sigaction new_action;
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new_action.sa_handler = fn;
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sigemptyset(&new_action.sa_mask);
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new_action.sa_flags = flags;
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if (sigaction(signum, &new_action, NULL)) {
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log_line("FATAL - failed to hook signal %i\n", signum);
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exit(EXIT_FAILURE);
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}
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}
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void disable_signal(int signum) {
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struct sigaction new_action;
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new_action.sa_handler = SIG_IGN;
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sigemptyset(&new_action.sa_mask);
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new_action.sa_flags = 0;
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if (sigaction(signum, &new_action, NULL)) {
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log_line("FATAL - failed to ignore signal %i\n", signum);
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exit(EXIT_FAILURE);
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}
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}
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