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glibc/posix/tst-spawn.c
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines 
We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-09-03 22:06:44 +05:30

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/* Tests for spawn.
Copyright (C) 2000-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <getopt.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <spawn.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <support/check.h>
#include <support/xunistd.h>
#include <support/temp_file.h>
#include <support/support.h>
/* Nonzero if the program gets called via `exec'. */
static int restart;
#define CMDLINE_OPTIONS \
{ "restart", no_argument, &restart, 1 },
/* Name of the temporary files. */
static char *name1;
static char *name2;
static char *name3;
static char *name5;
/* Descriptors for the temporary files. */
static int temp_fd1 = -1;
static int temp_fd2 = -1;
static int temp_fd3 = -1;
static int temp_fd5 = -1;
/* The contents of our files. */
static const char fd1string[] = "This file should get closed";
static const char fd2string[] = "This file should stay opened";
static const char fd3string[] = "This file will be opened";
static const char fd5string[] = "This file should stay opened (O_CLOEXEC)";
/* We have a preparation function. */
static void
do_prepare (int argc, char *argv[])
{
/* We must not open any files in the restart case. */
if (restart)
return;
TEST_VERIFY_EXIT ((temp_fd1 = create_temp_file ("spawn", &name1)) != -1);
TEST_VERIFY_EXIT ((temp_fd2 = create_temp_file ("spawn", &name2)) != -1);
TEST_VERIFY_EXIT ((temp_fd3 = create_temp_file ("spawn", &name3)) != -1);
TEST_VERIFY_EXIT ((temp_fd5 = create_temp_file ("spawn", &name5)) != -1);
int flags;
TEST_VERIFY_EXIT ((flags = fcntl (temp_fd5, F_GETFD, &flags)) != -1);
TEST_COMPARE (fcntl (temp_fd5, F_SETFD, flags | FD_CLOEXEC), 0);
}
#define PREPARE do_prepare
static int
handle_restart (const char *fd1s, const char *fd2s, const char *fd3s,
const char *fd4s, const char *name, const char *fd5s)
{
char buf[100];
int fd1;
int fd2;
int fd3;
int fd4;
int fd5;
/* First get the descriptors. */
fd1 = atol (fd1s);
fd2 = atol (fd2s);
fd3 = atol (fd3s);
fd4 = atol (fd4s);
fd5 = atol (fd5s);
/* Sanity check. */
TEST_VERIFY_EXIT (fd1 != fd2);
TEST_VERIFY_EXIT (fd1 != fd3);
TEST_VERIFY_EXIT (fd1 != fd4);
TEST_VERIFY_EXIT (fd2 != fd3);
TEST_VERIFY_EXIT (fd2 != fd4);
TEST_VERIFY_EXIT (fd3 != fd4);
TEST_VERIFY_EXIT (fd4 != fd5);
/* First the easy part: read from the file descriptor which is
supposed to be open. */
TEST_COMPARE (xlseek (fd2, 0, SEEK_CUR), strlen (fd2string));
/* The duped descriptor must have the same position. */
TEST_COMPARE (xlseek (fd4, 0, SEEK_CUR), strlen (fd2string));
TEST_COMPARE (xlseek (fd2, 0, SEEK_SET), 0);
TEST_COMPARE (xlseek (fd4, 0, SEEK_CUR), 0);
TEST_COMPARE (read (fd2, buf, sizeof buf), strlen (fd2string));
TEST_COMPARE_BLOB (fd2string, strlen (fd2string), buf, strlen (fd2string));
/* Now read from the third file. */
TEST_COMPARE (read (fd3, buf, sizeof buf), strlen (fd3string));
TEST_COMPARE_BLOB (fd3string, strlen (fd3string), buf, strlen (fd3string));
/* Try to write to the file. This should not be allowed. */
TEST_COMPARE (write (fd3, "boo!", 4), -1);
TEST_COMPARE (errno, EBADF);
/* Now try to read the first file. First make sure it is not opened. */
TEST_COMPARE (lseek (fd1, 0, SEEK_CUR), (off_t) -1);
TEST_COMPARE (errno, EBADF);
/* Now open the file and read it. */
fd1 = xopen (name, O_RDONLY, 0600);
TEST_COMPARE (read (fd1, buf, sizeof buf), strlen (fd1string));
TEST_COMPARE_BLOB (fd1string, strlen (fd1string), buf, strlen (fd1string));
TEST_COMPARE (xlseek (fd5, 0, SEEK_SET), 0);
TEST_COMPARE (read (fd5, buf, sizeof buf), strlen (fd5string));
TEST_COMPARE_BLOB (fd5string, strlen (fd5string), buf, strlen (fd5string));
return 0;
}
static int
do_test (int argc, char *argv[])
{
pid_t pid;
int fd4;
int status;
posix_spawn_file_actions_t actions;
char fd1name[18];
char fd2name[18];
char fd3name[18];
char fd4name[18];
char fd5name[18];
char *name3_copy;
char *spargv[13];
int i;
/* We must have
- one or four parameters left if called initially
+ path for ld.so optional
+ "--library-path" optional
+ the library path optional
+ the application name
- six parameters left if called through re-execution
+ file descriptor number which is supposed to be closed
+ the open file descriptor
+ the newly opened file descriptor
+ the duped second descriptor
+ the name of the closed descriptor
+ the duped fourth file descriptor which O_CLOEXEC should be
remove by adddup2.
*/
if (argc != (restart ? 7 : 2) && argc != (restart ? 7 : 5))
FAIL_EXIT1 ("wrong number of arguments (%d)", argc);
if (restart)
return handle_restart (argv[1], argv[2], argv[3], argv[4], argv[5],
argv[6]);
/* Prepare the test. We are creating four files: two which file descriptor
will be marked with FD_CLOEXEC, another which is not. */
/* Write something in the files. */
xwrite (temp_fd1, fd1string, strlen (fd1string));
xwrite (temp_fd2, fd2string, strlen (fd2string));
xwrite (temp_fd3, fd3string, strlen (fd3string));
xwrite (temp_fd5, fd5string, strlen (fd5string));
/* Close the third file. It'll be opened by `spawn'. */
xclose (temp_fd3);
/* Tell `spawn' what to do. */
TEST_COMPARE (posix_spawn_file_actions_init (&actions), 0);
/* Close `temp_fd1'. */
TEST_COMPARE (posix_spawn_file_actions_addclose (&actions, temp_fd1), 0);
/* We want to open the third file. */
name3_copy = xstrdup (name3);
TEST_COMPARE (posix_spawn_file_actions_addopen (&actions, temp_fd3,
name3_copy,
O_RDONLY, 0666),
0);
/* Overwrite the name to check that a copy has been made. */
memset (name3_copy, 'X', strlen (name3_copy));
/* We dup the second descriptor. */
fd4 = MAX (2, MAX (temp_fd1, MAX (temp_fd2, MAX (temp_fd3, temp_fd5)))) + 1;
TEST_COMPARE (posix_spawn_file_actions_adddup2 (&actions, temp_fd2, fd4),
0);
/* We clear the O_CLOEXEC on fourth descriptor, so it should be
stay open on child. */
TEST_COMPARE (posix_spawn_file_actions_adddup2 (&actions, temp_fd5,
temp_fd5),
0);
/* Now spawn the process. */
snprintf (fd1name, sizeof fd1name, "%d", temp_fd1);
snprintf (fd2name, sizeof fd2name, "%d", temp_fd2);
snprintf (fd3name, sizeof fd3name, "%d", temp_fd3);
snprintf (fd4name, sizeof fd4name, "%d", fd4);
snprintf (fd5name, sizeof fd5name, "%d", temp_fd5);
for (i = 0; i < (argc == (restart ? 7 : 5) ? 4 : 1); i++)
spargv[i] = argv[i + 1];
spargv[i++] = (char *) "--direct";
spargv[i++] = (char *) "--restart";
spargv[i++] = fd1name;
spargv[i++] = fd2name;
spargv[i++] = fd3name;
spargv[i++] = fd4name;
spargv[i++] = name1;
spargv[i++] = fd5name;
spargv[i] = NULL;
TEST_COMPARE (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ),
0);
/* Wait for the children. */
TEST_COMPARE (xwaitpid (pid, &status, 0), pid);
TEST_VERIFY (WIFEXITED (status));
TEST_VERIFY (!WIFSIGNALED (status));
TEST_COMPARE (WEXITSTATUS (status), 0);
/* Same test but with a NULL pid argument. */
TEST_COMPARE (posix_spawn (NULL, argv[1], &actions, NULL, spargv, environ),
0);
/* Cleanup. */
TEST_COMPARE (posix_spawn_file_actions_destroy (&actions), 0);
free (name3_copy);
/* Wait for the children. */
xwaitpid (-1, &status, 0);
TEST_VERIFY (WIFEXITED (status));
TEST_VERIFY (!WIFSIGNALED (status));
TEST_COMPARE (WEXITSTATUS (status), 0);
return 0;
}
#define TEST_FUNCTION_ARGV do_test
#include <support/test-driver.c>
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