Dmitry V. Levin
1f68abfed3
* tests/wait4.c: New file. * tests/wait4-v.c: Likewise. * tests/wait4.test: New test. * tests/wait4-v.test: Likewise. * tests/.gitignore: Add wait4 and wait4-v. * tests/Makefile.am (check_PROGRAMS): Likewise. (DECODER_TESTS): Add wait4.test and wait4-v.test.
200 lines
5.5 KiB
C
200 lines
5.5 KiB
C
/*
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* Check decoding of wait4 syscall.
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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 <stdio.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <sys/resource.h>
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static const char *
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sprint_rusage(const struct rusage *const ru)
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{
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static char buf[1024];
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snprintf(buf, sizeof(buf),
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"{ru_utime={%lu, %lu}"
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", ru_stime={%lu, %lu}"
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#ifdef VERBOSE_RUSAGE
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", ru_maxrss=%lu"
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", ru_ixrss=%lu"
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", ru_idrss=%lu"
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", ru_isrss=%lu"
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", ru_minflt=%lu"
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", ru_majflt=%lu"
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", ru_nswap=%lu"
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", ru_inblock=%lu"
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", ru_oublock=%lu"
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", ru_msgsnd=%lu"
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", ru_msgrcv=%lu"
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", ru_nsignals=%lu"
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", ru_nvcsw=%lu"
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", ru_nivcsw=%lu}"
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#else
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", ...}"
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#endif
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, (long) ru->ru_utime.tv_sec
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, (long) ru->ru_utime.tv_usec
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, (long) ru->ru_stime.tv_sec
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, (long) ru->ru_stime.tv_usec
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#ifdef VERBOSE_RUSAGE
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, (long) ru->ru_maxrss
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, (long) ru->ru_ixrss
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, (long) ru->ru_idrss
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, (long) ru->ru_isrss
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, (long) ru->ru_minflt
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, (long) ru->ru_majflt
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, (long) ru->ru_nswap
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, (long) ru->ru_inblock
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, (long) ru->ru_oublock
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, (long) ru->ru_msgsnd
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, (long) ru->ru_msgrcv
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, (long) ru->ru_nsignals
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, (long) ru->ru_nvcsw
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, (long) ru->ru_nivcsw
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#endif
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);
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return buf;
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}
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static pid_t
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do_wait4(pid_t pid, int *wstatus, int options, struct rusage *ru)
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{
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sigset_t mask = {};
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sigaddset(&mask, SIGCHLD);
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assert(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);
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pid_t rc = wait4(pid, wstatus, options, ru);
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assert(sigprocmask(SIG_UNBLOCK, &mask, NULL) == 0);
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return rc;
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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;
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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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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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int *const s = tail_alloc(sizeof(*s));
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if (wait4(pid, s, WNOHANG|__WALL, NULL))
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perror_msg_and_fail("wait4 #1");
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tprintf("wait4(%d, %p, WNOHANG|__WALL, NULL) = 0\n", pid, s);
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struct rusage *const rusage = tail_alloc(sizeof(*rusage));
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if (wait4(pid, s, WNOHANG|__WALL, rusage))
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perror_msg_and_fail("wait4 #2");
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tprintf("wait4(%d, %p, WNOHANG|__WALL, %p) = 0\n", pid, s, rusage);
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assert(write(1, "", 1) == 1);
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(void) close(1);
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assert(do_wait4(pid, s, 0, rusage) == pid);
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assert(WIFEXITED(*s) && WEXITSTATUS(*s) == 42);
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tprintf("wait4(%d, [{WIFEXITED(s) && WEXITSTATUS(s) == 42}], 0, %s)"
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" = %d\n", pid, sprint_rusage(rusage), pid);
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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) raise(SIGUSR1);
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return 1;
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}
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assert(do_wait4(pid, s, __WALL, rusage) == pid);
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assert(WIFSIGNALED(*s) && WTERMSIG(*s) == SIGUSR1);
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tprintf("wait4(%d, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGUSR1}]"
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", __WALL, %s) = %d\n", pid, sprint_rusage(rusage), pid);
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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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assert(do_wait4(pid, s, WSTOPPED, rusage) == pid);
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assert(WIFSTOPPED(*s) && WSTOPSIG(*s) == SIGSTOP);
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tprintf("wait4(%d, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGSTOP}]"
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", WSTOPPED, %s) = %d\n", pid, sprint_rusage(rusage), pid);
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if (kill(pid, SIGCONT))
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perror_msg_and_fail("kill(SIGCONT)");
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#if defined WCONTINUED && defined WIFCONTINUED
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assert(do_wait4(pid, s, WCONTINUED, rusage) == pid);
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assert(WIFCONTINUED(*s));
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tprintf("wait4(%d, [{WIFCONTINUED(s)}], WCONTINUED"
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", %s) = %d\n", pid, sprint_rusage(rusage), pid);
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#endif /* WCONTINUED && WIFCONTINUED */
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assert(write(1, "", 1) == 1);
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(void) close(1);
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assert(do_wait4(pid, s, 0, rusage) == pid);
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assert(WIFEXITED(*s) && WEXITSTATUS(*s) == 0);
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tprintf("wait4(%d, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0"
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", %s) = %d\n", pid, sprint_rusage(rusage), pid);
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assert(wait4(-1, s, WNOHANG|WSTOPPED|__WALL, rusage) == -1);
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tprintf("wait4(-1, %p, WNOHANG|WSTOPPED|__WALL, %p) = -1 %s (%m)\n",
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s, rusage, errno2name());
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tprintf("%s\n", "+++ exited with 0 +++");
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return 0;
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}
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