libc
/* $Id$ */
/* Copyright (c) 2012-2020 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS System libc */
/* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
/* signal */
/* private */
/* variables */
static int _ret;
/* prototypes */
static int _sigismember(char const * progname, int signal);
static void _on_sigusr1(int signal);
static void _on_sigusr2(int signal);
static int _error(char const * progname, char const * message, int ret);
/* functions */
/* sigismember */
static int _sigismember(char const * progname, int signal)
{
sigset_t set;
printf("%s: Testing sigismember(%d)\n", progname, signal);
if(sigemptyset(&set) != 0 || sigismember(&set, signal))
return 1;
if(sigaddset(&set, signal) != 0 || sigismember(&set, signal) == 0)
return 2;
if(sigdelset(&set, signal) != 0 || sigismember(&set, signal))
return 4;
if(sigfillset(&set) != 0 || sigismember(&set, signal) == 0)
return 8;
return 0;
}
/* on_sigusr1 */
static void _on_sigusr1(int signal)
{
(void) signal;
if(_ret == 3)
_ret = 0;
}
/* on_sigusr2 */
static void _on_sigusr2(int signal)
{
(void) signal;
if(_ret == 2)
_ret = 3;
}
/* error */
static int _error(char const * progname, char const * message, int ret)
{
fprintf(stderr, "%s: ", progname);
perror(message);
return ret;
}
/* public */
/* functions */
int main(int argc, char * argv[])
{
int ret = 0;
(void) argc;
ret = (_sigismember(argv[0], SIGHUP) << 2);
_ret = 2;
printf("%s: %s", argv[0], "Testing signal()\n");
if(signal(SIGUSR1, _on_sigusr1) == SIG_ERR)
_error(argv[0], "signal", 2);
if(signal(SIGUSR2, _on_sigusr2) == SIG_ERR)
_error(argv[0], "signal", 2);
if(signal(SIGKILL, SIG_IGN) != SIG_ERR)
fprintf(stderr, "%s: %s: %s\n", argv[0], "signal",
"Should not allow ignoring SIGKILL");
if(signal(SIGTERM, SIG_IGN) == SIG_ERR)
_error(argv[0], "signal", 2);
printf("%s: %s", argv[0], "Testing kill()\n");
if(raise(SIGUSR2) != 0)
_error(argv[0], "kill", 2);
if(raise(SIGUSR1) != 0)
_error(argv[0], "kill", 2);
if(raise(SIGTERM) != 0)
_error(argv[0], "kill", 2);
return (ret | _ret);
}