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Diffstat (limited to 'posix/tst-fork.c')
| -rw-r--r-- | posix/tst-fork.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/posix/tst-fork.c b/posix/tst-fork.c deleted file mode 100644 index fba82631ce..0000000000 --- a/posix/tst-fork.c +++ /dev/null @@ -1,151 +0,0 @@ -/* Tests for fork. - Copyright (C) 2000-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000. - - 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, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <error.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <wait.h> - - -static const char testdata[] = "This is a test"; -static const char testdata2[] = "And here we go again"; - - -int -main (void) -{ - const char *tmpdir = getenv ("TMPDIR"); - char buf[100]; - size_t tmpdirlen; - char *name; - int fd; - pid_t pid; - pid_t ppid; - off_t off; - int status; - - if (tmpdir == NULL || *tmpdir == '\0') - tmpdir = "/tmp"; - tmpdirlen = strlen (tmpdir); - - name = (char *) malloc (tmpdirlen + strlen ("/forkXXXXXX") + 1); - if (name == NULL) - error (EXIT_FAILURE, errno, "cannot allocate file name"); - - mempcpy (mempcpy (name, tmpdir, tmpdirlen), - "/forkXXXXXX", sizeof ("/forkXXXXXX")); - - /* Open our test file. */ - fd = mkstemp (name); - if (fd == -1) - error (EXIT_FAILURE, errno, "cannot open test file `%s'", name); - - /* Make sure it gets removed. */ - unlink (name); - - /* Write some data. */ - if (write (fd, testdata, strlen (testdata)) != strlen (testdata)) - error (EXIT_FAILURE, errno, "cannot write test data"); - - /* Get the position in the stream. */ - off = lseek (fd, 0, SEEK_CUR); - if (off == (off_t) -1 || off != strlen (testdata)) - error (EXIT_FAILURE, errno, "wrong file position"); - - /* Get the parent PID. */ - ppid = getpid (); - - /* Now fork of the process. */ - pid = fork (); - if (pid == 0) - { - /* One little test first: the PID must have changed. */ - if (getpid () == ppid) - error (EXIT_FAILURE, 0, "child and parent have same PID"); - - /* Test the `getppid' function. */ - pid = getppid (); - if (pid == (pid_t) -1 ? errno != ENOSYS : pid != ppid) - error (EXIT_FAILURE, 0, - "getppid returned wrong PID (%ld, should be %ld)", - (long int) pid, (long int) ppid); - - /* This is the child. First get the position of the descriptor. */ - off = lseek (fd, 0, SEEK_CUR); - if (off == (off_t) -1 || off != strlen (testdata)) - error (EXIT_FAILURE, errno, "wrong file position in child"); - - /* Reset the position. */ - if (lseek (fd, 0, SEEK_SET) != 0) - error (EXIT_FAILURE, errno, "cannot reset position in child"); - - /* Read the data. */ - if (read (fd, buf, sizeof buf) != strlen (testdata)) - error (EXIT_FAILURE, errno, "cannot read data in child"); - - /* Compare the data. */ - if (memcmp (buf, testdata, strlen (testdata)) != 0) - error (EXIT_FAILURE, 0, "data comparison failed in child"); - - /* Reset position again. */ - if (lseek (fd, 0, SEEK_SET) != 0) - error (EXIT_FAILURE, errno, "cannot reset position again in child"); - - /* Write new data. */ - if (write (fd, testdata2, strlen (testdata2)) != strlen (testdata2)) - error (EXIT_FAILURE, errno, "cannot write new data in child"); - - /* Close the file. This must not remove it. */ - close (fd); - - _exit (0); - } - else if (pid < 0) - /* Something went wrong. */ - error (EXIT_FAILURE, errno, "cannot fork"); - - /* Wait for the child. */ - if (waitpid (pid, &status, 0) != pid) - error (EXIT_FAILURE, 0, "Oops, wrong test program terminated"); - - if (WTERMSIG (status) != 0) - error (EXIT_FAILURE, 0, "Child terminated incorrectly"); - status = WEXITSTATUS (status); - - if (status == 0) - { - /* Test whether the child wrote the right data. First test the - position. It must be the same as in the child. */ - if (lseek (fd, 0, SEEK_CUR) != strlen (testdata2)) - error (EXIT_FAILURE, 0, "file position not changed"); - - if (lseek (fd, 0, SEEK_SET) != 0) - error (EXIT_FAILURE, errno, "cannot reset file position"); - - if (read (fd, buf, sizeof buf) != strlen (testdata2)) - error (EXIT_FAILURE, errno, "cannot read new data"); - - if (memcmp (buf, testdata2, strlen (testdata2)) != 0) - error (EXIT_FAILURE, 0, "new data not read correctly"); - } - - return status; -} |