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/* Test that spawn file action functions work without file limit.
Copyright (C) 2016-2024 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 <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"
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