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521 lines
14 KiB
C
521 lines
14 KiB
C
/* Tests for waitid.
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Copyright (C) 2004-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <signal.h>
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#define TIMEOUT 15
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static void
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test_child (void)
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{
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/* Wait a second to be sure the parent set his variables before we
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produce a SIGCHLD. */
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sleep (1);
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/* First thing, we stop ourselves. */
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raise (SIGSTOP);
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/* Hey, we got continued! */
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while (1)
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pause ();
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}
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#ifndef WEXITED
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# define WEXITED 0
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# define WCONTINUED 0
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# define WSTOPPED WUNTRACED
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#endif
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static sig_atomic_t expecting_sigchld, spurious_sigchld;
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#ifdef SA_SIGINFO
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static siginfo_t sigchld_info;
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static void
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sigchld (int signo, siginfo_t *info, void *ctx)
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{
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if (signo != SIGCHLD)
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{
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printf ("SIGCHLD handler got signal %d instead!\n", signo);
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_exit (EXIT_FAILURE);
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}
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if (! expecting_sigchld)
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{
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spurious_sigchld = 1;
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printf ("spurious SIGCHLD: signo %d code %d status %d pid %d\n",
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info->si_signo, info->si_code, info->si_status, info->si_pid);
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}
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else
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{
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sigchld_info = *info;
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expecting_sigchld = 0;
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}
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}
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static void
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check_sigchld (const char *phase, int *ok, int code, int status, pid_t pid)
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{
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if (expecting_sigchld)
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{
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printf ("missing SIGCHLD on %s\n", phase);
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*ok = EXIT_FAILURE;
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expecting_sigchld = 0;
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return;
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}
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if (sigchld_info.si_signo != SIGCHLD)
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{
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printf ("SIGCHLD for %s signal %d\n", phase, sigchld_info.si_signo);
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*ok = EXIT_FAILURE;
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}
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if (sigchld_info.si_code != code)
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{
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printf ("SIGCHLD for %s code %d\n", phase, sigchld_info.si_code);
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*ok = EXIT_FAILURE;
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}
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if (sigchld_info.si_status != status)
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{
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printf ("SIGCHLD for %s status %d\n", phase, sigchld_info.si_status);
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*ok = EXIT_FAILURE;
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}
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if (sigchld_info.si_pid != pid)
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{
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printf ("SIGCHLD for %s pid %d\n", phase, sigchld_info.si_pid);
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*ok = EXIT_FAILURE;
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}
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}
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# define CHECK_SIGCHLD(phase, code_check, status_check) \
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check_sigchld ((phase), &status, (code_check), (status_check), pid)
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#else
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# define CHECK_SIGCHLD(phase, code, status) ((void) 0)
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#endif
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static int
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do_test (int argc, char *argv[])
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{
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#ifdef SA_SIGINFO
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struct sigaction sa;
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sa.sa_flags = SA_SIGINFO|SA_RESTART;
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sa.sa_sigaction = &sigchld;
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if (sigemptyset (&sa.sa_mask) < 0 || sigaction (SIGCHLD, &sa, NULL) < 0)
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{
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printf ("setting SIGCHLD handler: %m\n");
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return EXIT_FAILURE;
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}
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#endif
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expecting_sigchld = 1;
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pid_t pid = fork ();
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if (pid < 0)
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{
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printf ("fork: %m\n");
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return EXIT_FAILURE;
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}
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else if (pid == 0)
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{
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test_child ();
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_exit (127);
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}
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int status = EXIT_SUCCESS;
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#define RETURN(ok) \
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do { if (status == EXIT_SUCCESS) status = (ok); goto out; } while (0)
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/* Give the child a chance to stop. */
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sleep (3);
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CHECK_SIGCHLD ("stopped (before waitid)", CLD_STOPPED, SIGSTOP);
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/* Now try a wait that should not succeed. */
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siginfo_t info;
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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int fail = waitid (P_PID, pid, &info, WEXITED|WCONTINUED|WNOHANG);
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switch (fail)
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{
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default:
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printf ("waitid returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WNOHANG on stopped: %m\n");
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RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
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case 0:
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if (info.si_signo == 0)
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break;
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if (info.si_signo == SIGCHLD)
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printf ("waitid WNOHANG on stopped status %d\n", info.si_status);
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else
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printf ("waitid WNOHANG on stopped signal %d\n", info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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/* Next the wait that should succeed right away. */
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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info.si_pid = -1;
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info.si_status = -1;
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fail = waitid (P_PID, pid, &info, WSTOPPED|WNOHANG);
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switch (fail)
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{
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default:
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printf ("waitid WSTOPPED|WNOHANG returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WSTOPPED|WNOHANG on stopped: %m\n");
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RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
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case 0:
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if (info.si_signo != SIGCHLD)
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{
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printf ("waitid WSTOPPED|WNOHANG on stopped signal %d\n",
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info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_code != CLD_STOPPED)
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{
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printf ("waitid WSTOPPED|WNOHANG on stopped code %d\n",
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info.si_code);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_status != SIGSTOP)
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{
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printf ("waitid WSTOPPED|WNOHANG on stopped status %d\n",
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info.si_status);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_pid != pid)
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{
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printf ("waitid WSTOPPED|WNOHANG on stopped pid %d != %d\n",
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info.si_pid, pid);
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RETURN (EXIT_FAILURE);
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}
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}
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expecting_sigchld = WCONTINUED != 0;
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if (kill (pid, SIGCONT) != 0)
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{
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printf ("kill (%d, SIGCONT): %m\n", pid);
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RETURN (EXIT_FAILURE);
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}
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/* Wait for the child to have continued. */
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sleep (2);
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#if WCONTINUED != 0
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if (expecting_sigchld)
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{
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printf ("no SIGCHLD seen for SIGCONT (optional)\n");
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expecting_sigchld = 0;
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}
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else
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CHECK_SIGCHLD ("continued (before waitid)", CLD_CONTINUED, SIGCONT);
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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info.si_pid = -1;
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info.si_status = -1;
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fail = waitid (P_PID, pid, &info, WCONTINUED|WNOWAIT);
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switch (fail)
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{
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default:
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printf ("waitid WCONTINUED|WNOWAIT returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WCONTINUED|WNOWAIT on continued: %m\n");
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RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
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case 0:
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if (info.si_signo != SIGCHLD)
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{
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printf ("waitid WCONTINUED|WNOWAIT on continued signal %d\n",
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info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_code != CLD_CONTINUED)
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{
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printf ("waitid WCONTINUED|WNOWAIT on continued code %d\n",
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info.si_code);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_status != SIGCONT)
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{
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printf ("waitid WCONTINUED|WNOWAIT on continued status %d\n",
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info.si_status);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_pid != pid)
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{
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printf ("waitid WCONTINUED|WNOWAIT on continued pid %d != %d\n",
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info.si_pid, pid);
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RETURN (EXIT_FAILURE);
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}
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}
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/* That should leave the CLD_CONTINUED state waiting to be seen again. */
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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info.si_pid = -1;
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info.si_status = -1;
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fail = waitid (P_PID, pid, &info, WCONTINUED);
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switch (fail)
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{
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default:
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printf ("waitid WCONTINUED returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WCONTINUED on continued: %m\n");
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RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
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case 0:
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if (info.si_signo != SIGCHLD)
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{
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printf ("waitid WCONTINUED on continued signal %d\n", info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_code != CLD_CONTINUED)
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{
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printf ("waitid WCONTINUED on continued code %d\n", info.si_code);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_status != SIGCONT)
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{
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printf ("waitid WCONTINUED on continued status %d\n",
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info.si_status);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_pid != pid)
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{
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printf ("waitid WCONTINUED on continued pid %d != %d\n",
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info.si_pid, pid);
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RETURN (EXIT_FAILURE);
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}
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}
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/* Now try a wait that should not succeed. */
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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fail = waitid (P_PID, pid, &info, WCONTINUED|WNOHANG);
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switch (fail)
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{
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default:
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printf ("waitid returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WCONTINUED|WNOHANG on waited continued: %m\n");
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RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
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case 0:
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if (info.si_signo == 0)
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break;
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if (info.si_signo == SIGCHLD)
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printf ("waitid WCONTINUED|WNOHANG on waited continued status %d\n",
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info.si_status);
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else
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printf ("waitid WCONTINUED|WNOHANG on waited continued signal %d\n",
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info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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/* Now stop him again and test waitpid with WCONTINUED. */
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expecting_sigchld = 1;
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if (kill (pid, SIGSTOP) != 0)
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{
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printf ("kill (%d, SIGSTOP): %m\n", pid);
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RETURN (EXIT_FAILURE);
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}
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/* Give the child a chance to stop. The waitpid call below will block
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until it has stopped, but if we are real quick and enter the waitpid
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system call before the SIGCHLD has been generated, then it will be
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discarded and never delivered. */
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sleep (3);
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pid_t wpid = waitpid (pid, &fail, WUNTRACED);
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if (wpid < 0)
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{
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printf ("waitpid WUNTRACED on stopped: %m\n");
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RETURN (EXIT_FAILURE);
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}
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else if (wpid != pid)
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{
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printf ("waitpid WUNTRACED on stopped returned %d != %d (status %x)\n",
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wpid, pid, fail);
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RETURN (EXIT_FAILURE);
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}
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else if (!WIFSTOPPED (fail) || WIFSIGNALED (fail) || WIFEXITED (fail)
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|| WIFCONTINUED (fail) || WSTOPSIG (fail) != SIGSTOP)
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{
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printf ("waitpid WUNTRACED on stopped: status %x\n", fail);
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RETURN (EXIT_FAILURE);
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}
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CHECK_SIGCHLD ("stopped (after waitpid)", CLD_STOPPED, SIGSTOP);
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expecting_sigchld = 1;
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if (kill (pid, SIGCONT) != 0)
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{
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printf ("kill (%d, SIGCONT): %m\n", pid);
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RETURN (EXIT_FAILURE);
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}
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/* Wait for the child to have continued. */
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sleep (2);
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if (expecting_sigchld)
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{
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printf ("no SIGCHLD seen for SIGCONT (optional)\n");
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expecting_sigchld = 0;
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}
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else
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CHECK_SIGCHLD ("continued (before waitpid)", CLD_CONTINUED, SIGCONT);
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wpid = waitpid (pid, &fail, WCONTINUED);
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if (wpid < 0)
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{
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if (errno == EINVAL)
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printf ("waitpid does not support WCONTINUED\n");
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else
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{
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printf ("waitpid WCONTINUED on continued: %m\n");
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RETURN (EXIT_FAILURE);
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}
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}
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else if (wpid != pid)
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{
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printf ("\
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waitpid WCONTINUED on continued returned %d != %d (status %x)\n",
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wpid, pid, fail);
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RETURN (EXIT_FAILURE);
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}
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else if (WIFSTOPPED (fail) || WIFSIGNALED (fail) || WIFEXITED (fail)
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|| !WIFCONTINUED (fail))
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{
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printf ("waitpid WCONTINUED on continued: status %x\n", fail);
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RETURN (EXIT_FAILURE);
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}
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#endif
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expecting_sigchld = 1;
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/* Die, child, die! */
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if (kill (pid, SIGKILL) != 0)
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{
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printf ("kill (%d, SIGKILL): %m\n", pid);
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RETURN (EXIT_FAILURE);
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}
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#ifdef WNOWAIT
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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info.si_pid = -1;
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info.si_status = -1;
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fail = waitid (P_PID, pid, &info, WEXITED|WNOWAIT);
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switch (fail)
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{
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default:
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printf ("waitid WNOWAIT returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WNOWAIT on killed: %m\n");
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RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
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case 0:
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if (info.si_signo != SIGCHLD)
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{
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printf ("waitid WNOWAIT on killed signal %d\n", info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_code != CLD_KILLED)
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{
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printf ("waitid WNOWAIT on killed code %d\n", info.si_code);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_status != SIGKILL)
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{
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printf ("waitid WNOWAIT on killed status %d\n", info.si_status);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_pid != pid)
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{
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printf ("waitid WNOWAIT on killed pid %d != %d\n", info.si_pid, pid);
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RETURN (EXIT_FAILURE);
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}
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}
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#else
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/* Allow enough time to be sure the child died; we didn't synchronize. */
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sleep (2);
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#endif
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CHECK_SIGCHLD ("killed", CLD_KILLED, SIGKILL);
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info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
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info.si_pid = -1;
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info.si_status = -1;
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fail = waitid (P_PID, pid, &info, WEXITED|WNOHANG);
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switch (fail)
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{
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default:
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printf ("waitid WNOHANG returned bogus value %d\n", fail);
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RETURN (EXIT_FAILURE);
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case -1:
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printf ("waitid WNOHANG on killed: %m\n");
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RETURN (EXIT_FAILURE);
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case 0:
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if (info.si_signo != SIGCHLD)
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{
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printf ("waitid WNOHANG on killed signal %d\n", info.si_signo);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_code != CLD_KILLED)
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{
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printf ("waitid WNOHANG on killed code %d\n", info.si_code);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_status != SIGKILL)
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{
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printf ("waitid WNOHANG on killed status %d\n", info.si_status);
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RETURN (EXIT_FAILURE);
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}
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if (info.si_pid != pid)
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{
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printf ("waitid WNOHANG on killed pid %d != %d\n", info.si_pid, pid);
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RETURN (EXIT_FAILURE);
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}
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}
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fail = waitid (P_PID, pid, &info, WEXITED);
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if (fail == -1)
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{
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if (errno != ECHILD)
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{
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printf ("waitid WEXITED on killed: %m\n");
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RETURN (EXIT_FAILURE);
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}
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}
|
|
else
|
|
{
|
|
printf ("waitid WEXITED returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
#undef RETURN
|
|
out:
|
|
if (spurious_sigchld)
|
|
status = EXIT_FAILURE;
|
|
signal (SIGCHLD, SIG_IGN);
|
|
kill (pid, SIGKILL); /* Make sure it's dead if we bailed early. */
|
|
return status;
|
|
}
|
|
|
|
#include "../test-skeleton.c"
|