mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 06:40:09 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
152 lines
4.4 KiB
C
152 lines
4.4 KiB
C
/* Check posix_spawn add file actions.
|
|
Copyright (C) 2016-2018 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <spawn.h>
|
|
#include <error.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/resource.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/temp_file.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* The test checks if posix_spawn open file action close the file descriptor
|
|
before opening a new one in case the input file descriptor is already
|
|
opened. It does by exhausting all file descriptors on the process before
|
|
issue posix_spawn. It then issues a posix_spawn for '/bin/sh echo $$'
|
|
and add two rules:
|
|
|
|
1. Redirect stdout to a temporary filepath
|
|
2. Redirect stderr to stdout
|
|
|
|
If the implementation does not close the file 1. will fail with
|
|
EMFILE. */
|
|
|
|
struct rlimit rl;
|
|
int max_fd = 24;
|
|
int ret;
|
|
|
|
/* Set maximum number of file descriptor to a low value to avoid open
|
|
too many files in environments where RLIMIT_NOFILE is large and to
|
|
limit the array size to track the opened file descriptors. */
|
|
|
|
if (getrlimit (RLIMIT_NOFILE, &rl) == -1)
|
|
FAIL_EXIT1 ("getrlimit (RLIMIT_NOFILE): %m");
|
|
|
|
max_fd = (rl.rlim_cur < max_fd ? rl.rlim_cur : max_fd);
|
|
rl.rlim_cur = max_fd;
|
|
|
|
if (setrlimit (RLIMIT_NOFILE, &rl) == 1)
|
|
FAIL_EXIT1 ("setrlimit (RLIMIT_NOFILE): %m");
|
|
|
|
/* Exhauste the file descriptor limit with temporary files. */
|
|
int files[max_fd];
|
|
int nfiles = 0;
|
|
for (;;)
|
|
{
|
|
int fd = create_temp_file ("tst-spawn3.", NULL);
|
|
if (fd == -1)
|
|
{
|
|
if (errno != EMFILE)
|
|
FAIL_EXIT1 ("create_temp_file: %m");
|
|
break;
|
|
}
|
|
files[nfiles++] = fd;
|
|
}
|
|
|
|
posix_spawn_file_actions_t a;
|
|
if (posix_spawn_file_actions_init (&a) != 0)
|
|
FAIL_EXIT1 ("posix_spawn_file_actions_init");
|
|
|
|
/* Executes a /bin/sh echo $$ 2>&1 > /tmp/tst-spawn3.pid . */
|
|
const char pidfile[] = "/tmp/tst-spawn3.pid";
|
|
if (posix_spawn_file_actions_addopen (&a, STDOUT_FILENO, pidfile, O_WRONLY |
|
|
O_CREAT | O_TRUNC, 0644) != 0)
|
|
FAIL_EXIT1 ("posix_spawn_file_actions_addopen");
|
|
|
|
if (posix_spawn_file_actions_adddup2 (&a, STDOUT_FILENO, STDERR_FILENO) != 0)
|
|
FAIL_EXIT1 ("posix_spawn_file_actions_adddup2");
|
|
|
|
/* Since execve (called by posix_spawn) might require to open files to
|
|
actually execute the shell script, setup to close the temporary file
|
|
descriptors. */
|
|
for (int i=0; i<nfiles; i++)
|
|
{
|
|
if (posix_spawn_file_actions_addclose (&a, files[i]))
|
|
FAIL_EXIT1 ("posix_spawn_file_actions_addclose");
|
|
}
|
|
|
|
char *spawn_argv[] = { (char *) _PATH_BSHELL, (char *) "-c",
|
|
(char *) "echo $$", NULL };
|
|
pid_t pid;
|
|
if ((ret = posix_spawn (&pid, _PATH_BSHELL, &a, NULL, spawn_argv, NULL))
|
|
!= 0)
|
|
{
|
|
errno = ret;
|
|
FAIL_EXIT1 ("posix_spawn: %m");
|
|
}
|
|
|
|
int status;
|
|
int err = waitpid (pid, &status, 0);
|
|
if (err != pid)
|
|
FAIL_EXIT1 ("waitpid: %m");
|
|
|
|
/* Close the temporary files descriptor so it can check posix_spawn
|
|
output. */
|
|
for (int i=0; i<nfiles; i++)
|
|
{
|
|
if (close (files[i]))
|
|
FAIL_EXIT1 ("close: %m");
|
|
}
|
|
|
|
int pidfd = open (pidfile, O_RDONLY);
|
|
if (pidfd == -1)
|
|
FAIL_EXIT1 ("open: %m");
|
|
|
|
char buf[64];
|
|
ssize_t n;
|
|
if ((n = read (pidfd, buf, sizeof (buf))) < 0)
|
|
FAIL_EXIT1 ("read: %m");
|
|
|
|
unlink (pidfile);
|
|
|
|
/* We only expect to read the PID. */
|
|
char *endp;
|
|
long int rpid = strtol (buf, &endp, 10);
|
|
if (*endp != '\n')
|
|
FAIL_EXIT1 ("*endp != \'n\'");
|
|
if (endp == buf)
|
|
FAIL_EXIT1 ("read empty line");
|
|
|
|
if (rpid != pid)
|
|
FAIL_EXIT1 ("found \"%s\", expected pid %ld\n", buf, (long int) pid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|