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Diffstat (limited to 'posix/tst-vfork2.c')
| -rw-r--r-- | posix/tst-vfork2.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/posix/tst-vfork2.c b/posix/tst-vfork2.c new file mode 100644 index 0000000000..1d096e14a3 --- /dev/null +++ b/posix/tst-vfork2.c @@ -0,0 +1,199 @@ +/* Test for vfork functions. + Copyright (C) 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2004. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/wait.h> + +int raise_fail; + +static void +alrm (int sig) +{ + if (raise (SIGUSR1) < 0) + raise_fail = 1; +} + +/* This test relies on non-POSIX functionality since the child + processes call write, nanosleep and getpid. */ +static int +do_test (void) +{ + int result = 0; + int fd[2]; + + signal (SIGUSR1, SIG_IGN); + + struct sigaction sa; + sa.sa_handler = alrm; + sigemptyset (&sa.sa_mask); + sa.sa_flags = 0; + if (sigaction (SIGALRM, &sa, NULL) < 0) + { + puts ("couldn't set up SIGALRM handler"); + return 1; + } + + if (pipe (fd) == -1) + { + puts ("pipe failed"); + return 1; + } + + struct itimerval it; + it.it_value.tv_sec = 0; + it.it_value.tv_usec = 200 * 1000; + it.it_interval = it.it_value; + if (setitimer (ITIMER_REAL, &it, NULL) < 0) + { + puts ("couldn't set up timer"); + return 1; + } + + /* First vfork() without previous getpid(). */ + pid_t p1; + if ((p1 = vfork ()) == 0) + { + pid_t p = getpid (); + + struct timespec ts; + ts.tv_sec = 1; + ts.tv_nsec = 0; + TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); + _exit (TEMP_FAILURE_RETRY (write (fd[1], &p, sizeof (p))) != sizeof (p)); + } + else if (p1 == -1) + { + puts ("1st vfork failed"); + result = 1; + } + + memset (&it, 0, sizeof (it)); + setitimer (ITIMER_REAL, &it, NULL); + + pid_t p2 = 0; + if (TEMP_FAILURE_RETRY (read (fd[0], &p2, sizeof (pid_t))) != sizeof (pid_t)) + { + puts ("1st read failed"); + result = 1; + } + int r; + if (TEMP_FAILURE_RETRY (waitpid (p1, &r, 0)) != p1) + { + puts ("1st waitpid failed"); + result = 1; + } + else if (r != 0) + { + puts ("write in 1st child failed"); + result = 1; + } + + /* Main process' ID. */ + pid_t p0 = getpid (); + + /* vfork() again, but after a getpid() in the main process. */ + pid_t p3; + if ((p3 = vfork ()) == 0) + { + pid_t p = getpid (); + _exit (TEMP_FAILURE_RETRY (write (fd[1], &p, sizeof (p))) != sizeof (p)); + } + else if (p1 == -1) + { + puts ("2nd vfork failed"); + result = 1; + } + + pid_t p4; + if (TEMP_FAILURE_RETRY (read (fd[0], &p4, sizeof (pid_t))) != sizeof (pid_t)) + { + puts ("2nd read failed"); + result = 1; + } + if (TEMP_FAILURE_RETRY (waitpid (p3, &r, 0)) != p3) + { + puts ("2nd waitpid failed"); + result = 1; + } + else if (r != 0) + { + puts ("write in 2nd child failed"); + result = 1; + } + + /* And getpid in the main process again. */ + pid_t p5 = getpid (); + + /* Analysis of the results. */ + if (p0 != p5) + { + printf ("p0(%ld) != p5(%ld)\n", (long int) p0, (long int) p5); + result = 1; + } + + if (p0 == p1) + { + printf ("p0(%ld) == p1(%ld)\n", (long int) p0, (long int) p1); + result = 1; + } + + if (p1 != p2) + { + printf ("p1(%ld) != p2(%ld)\n", (long int) p1, (long int) p2); + result = 1; + } + + if (p0 == p3) + { + printf ("p0(%ld) == p3(%ld)\n", (long int) p0, (long int) p3); + result = 1; + } + + if (p3 != p4) + { + printf ("p3(%ld) != p4(%ld)\n", (long int) p3, (long int) p4); + result = 1; + } + + close (fd[0]); + close (fd[1]); + + if (raise_fail) + { + puts ("raise failed"); + result = 1; + } + + if (result == 0) + puts ("All OK"); + + return result; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |