176 lines
4.8 KiB
C
176 lines
4.8 KiB
C
/*
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* Check SIGCHLD siginfo_t decoding.
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*
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* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/wait.h>
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static siginfo_t sinfo;
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static void
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handler(int no, siginfo_t *si, void *uc)
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{
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memcpy(&sinfo, si, sizeof(sinfo));
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}
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int
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main(void)
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{
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tprintf("%s", "");
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int fds[2];
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if (pipe(fds))
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perror_msg_and_fail("pipe");
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pid_t pid = fork();
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if (pid < 0)
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perror_msg_and_fail("fork");
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if (!pid) {
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char c;
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(void) close(1);
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assert(read(0, &c, sizeof(c)) == 1);
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return 42;
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}
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(void) close(0);
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struct sigaction sa = {
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.sa_sigaction = handler,
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.sa_flags = SA_SIGINFO
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};
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assert(sigaction(SIGCHLD, &sa, NULL) == 0);
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sigset_t block_mask, unblock_mask;
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assert(sigprocmask(SIG_SETMASK, NULL, &block_mask) == 0);
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sigaddset(&block_mask, SIGCHLD);
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assert(sigprocmask(SIG_SETMASK, &block_mask, NULL) == 0);
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unblock_mask = block_mask;
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sigdelset(&unblock_mask, SIGCHLD);
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assert(write(1, "", 1) == 1);
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(void) close(1);
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sigsuspend(&unblock_mask);
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tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED"
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", si_pid=%d, si_uid=%u, si_status=%d"
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", si_utime=%llu, si_stime=%llu} ---\n",
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sinfo.si_pid, sinfo.si_uid, sinfo.si_status,
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zero_extend_signed_to_ull(sinfo.si_utime),
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zero_extend_signed_to_ull(sinfo.si_stime));
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int s;
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assert(wait(&s) == pid);
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assert(WIFEXITED(s) && WEXITSTATUS(s) == 42);
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if (pipe(fds))
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perror_msg_and_fail("pipe");
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pid = fork();
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if (pid < 0)
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perror_msg_and_fail("fork");
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if (!pid) {
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(void) close(1);
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char c;
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assert(read(0, &c, sizeof(c)) == 1);
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(void) raise(SIGUSR1);
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return 1;
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}
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(void) close(0);
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assert(write(1, "", 1) == 1);
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(void) close(1);
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sigsuspend(&unblock_mask);
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tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED"
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", si_pid=%d, si_uid=%u, si_status=SIGUSR1"
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", si_utime=%llu, si_stime=%llu} ---\n",
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sinfo.si_pid, sinfo.si_uid,
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zero_extend_signed_to_ull(sinfo.si_utime),
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zero_extend_signed_to_ull(sinfo.si_stime));
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assert(wait(&s) == pid);
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assert(WIFSIGNALED(s) && WTERMSIG(s) == SIGUSR1);
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if (pipe(fds))
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perror_msg_and_fail("pipe");
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pid = fork();
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if (pid < 0)
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perror_msg_and_fail("fork");
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if (!pid) {
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(void) close(1);
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raise(SIGSTOP);
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char c;
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assert(read(0, &c, sizeof(c)) == 1);
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return 0;
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}
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(void) close(0);
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sigsuspend(&unblock_mask);
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tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_STOPPED"
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", si_pid=%d, si_uid=%u, si_status=SIGSTOP"
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", si_utime=%llu, si_stime=%llu} ---\n",
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sinfo.si_pid, sinfo.si_uid,
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zero_extend_signed_to_ull(sinfo.si_utime),
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zero_extend_signed_to_ull(sinfo.si_stime));
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assert(kill(pid, SIGCONT) == 0);
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sigsuspend(&unblock_mask);
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tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_CONTINUED"
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", si_pid=%d, si_uid=%u, si_status=SIGCONT"
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", si_utime=%llu, si_stime=%llu} ---\n",
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sinfo.si_pid, sinfo.si_uid,
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zero_extend_signed_to_ull(sinfo.si_utime),
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zero_extend_signed_to_ull(sinfo.si_stime));
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assert(write(1, "", 1) == 1);
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(void) close(1);
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sigsuspend(&unblock_mask);
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tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED"
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", si_pid=%d, si_uid=%u, si_status=0"
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", si_utime=%llu, si_stime=%llu} ---\n",
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sinfo.si_pid, sinfo.si_uid,
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zero_extend_signed_to_ull(sinfo.si_utime),
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zero_extend_signed_to_ull(sinfo.si_stime));
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assert(wait(&s) == pid && s == 0);
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tprintf("%s\n", "+++ exited with 0 +++");
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return 0;
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}
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