glibc/posix/tst-posix_spawn-fd.c

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/* Test that spawn file action functions work without file limit.
Copyright (C) 2016-2022 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
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <spawn.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/resource.h>
#include <unistd.h>
/* _SC_OPEN_MAX value. */
static long maxfd;
/* A positive but unused file descriptor, used for testing
purposes. */
static int invalid_fd;
/* Indicate that errors have been encountered. */
static bool errors;
static posix_spawn_file_actions_t actions;
static void
one_test (const char *name, int (*func) (int), int fd,
bool expect_success)
{
int ret = func (fd);
if (expect_success)
{
if (ret != 0)
{
errno = ret;
printf ("error: posix_spawn_file_actions_%s (%d): %m\n", name, fd);
errors = true;
}
}
else if (ret != EBADF)
{
if (ret == 0)
printf ("error: posix_spawn_file_actions_%s (%d):"
" unexpected success\n", name, fd);
else
{
errno = ret;
printf ("error: posix_spawn_file_actions_%s (%d): %m\n", name, fd);
}
errors = true;
}
}
static void
all_tests (const char *name, int (*func) (int))
{
one_test (name, func, 0, true);
one_test (name, func, invalid_fd, true);
one_test (name, func, -1, false);
one_test (name, func, -2, false);
if (maxfd >= 0)
one_test (name, func, maxfd, false);
}
static int
addopen (int fd)
{
return posix_spawn_file_actions_addopen
(&actions, fd, "/dev/null", O_RDONLY, 0);
}
static int
adddup2 (int fd)
{
return posix_spawn_file_actions_adddup2 (&actions, fd, 1);
}
static int
adddup2_reverse (int fd)
{
return posix_spawn_file_actions_adddup2 (&actions, 1, fd);
}
static int
addclose (int fd)
{
return posix_spawn_file_actions_addclose (&actions, fd);
}
static void
all_functions (void)
{
all_tests ("addopen", addopen);
all_tests ("adddup2", adddup2);
all_tests ("adddup2", adddup2_reverse);
all_tests ("adddup2", addclose);
}
static int
do_test (void)
{
/* Try to eliminate the file descriptor limit. */
{
struct rlimit limit;
if (getrlimit (RLIMIT_NOFILE, &limit) < 0)
{
printf ("error: getrlimit: %m\n");
return 1;
}
limit.rlim_cur = RLIM_INFINITY;
if (setrlimit (RLIMIT_NOFILE, &limit) < 0)
printf ("warning: setrlimit: %m\n");
}
maxfd = sysconf (_SC_OPEN_MAX);
printf ("info: _SC_OPEN_MAX: %ld\n", maxfd);
invalid_fd = dup (0);
if (invalid_fd < 0)
{
printf ("error: dup: %m\n");
return 1;
}
if (close (invalid_fd) < 0)
{
printf ("error: close: %m\n");
return 1;
}
int ret = posix_spawn_file_actions_init (&actions);
if (ret != 0)
{
errno = ret;
printf ("error: posix_spawn_file_actions_init: %m\n");
return 1;
}
all_functions ();
ret = posix_spawn_file_actions_destroy (&actions);
if (ret != 0)
{
errno = ret;
printf ("error: posix_spawn_file_actions_destroy: %m\n");
return 1;
}
return errors;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"