| /* Test that spawn file action functions work without file limit. |
| 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 <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" |