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6793dd51 | 1 | /* Test that spawn file action functions work without file limit. |
688903eb | 2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
6793dd51 FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <fcntl.h> | |
21 | #include <spawn.h> | |
22 | #include <stdbool.h> | |
23 | #include <stdio.h> | |
24 | #include <sys/resource.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | /* _SC_OPEN_MAX value. */ | |
28 | static long maxfd; | |
29 | ||
30 | /* A positive but unused file descriptor, used for testing | |
31 | purposes. */ | |
32 | static int invalid_fd; | |
33 | ||
34 | /* Indicate that errors have been encountered. */ | |
35 | static bool errors; | |
36 | ||
37 | static posix_spawn_file_actions_t actions; | |
38 | ||
39 | static void | |
40 | one_test (const char *name, int (*func) (int), int fd, | |
41 | bool expect_success) | |
42 | { | |
43 | int ret = func (fd); | |
44 | if (expect_success) | |
45 | { | |
46 | if (ret != 0) | |
47 | { | |
48 | errno = ret; | |
49 | printf ("error: posix_spawn_file_actions_%s (%d): %m\n", name, fd); | |
50 | errors = true; | |
51 | } | |
52 | } | |
53 | else if (ret != EBADF) | |
54 | { | |
55 | if (ret == 0) | |
56 | printf ("error: posix_spawn_file_actions_%s (%d):" | |
57 | " unexpected success\n", name, fd); | |
58 | else | |
59 | { | |
60 | errno = ret; | |
61 | printf ("error: posix_spawn_file_actions_%s (%d): %m\n", name, fd); | |
62 | } | |
63 | errors = true; | |
64 | } | |
65 | } | |
66 | ||
67 | static void | |
68 | all_tests (const char *name, int (*func) (int)) | |
69 | { | |
70 | one_test (name, func, 0, true); | |
71 | one_test (name, func, invalid_fd, true); | |
72 | one_test (name, func, -1, false); | |
73 | one_test (name, func, -2, false); | |
74 | if (maxfd >= 0) | |
75 | one_test (name, func, maxfd, false); | |
76 | } | |
77 | ||
78 | static int | |
79 | addopen (int fd) | |
80 | { | |
81 | return posix_spawn_file_actions_addopen | |
82 | (&actions, fd, "/dev/null", O_RDONLY, 0); | |
83 | } | |
84 | ||
85 | static int | |
86 | adddup2 (int fd) | |
87 | { | |
88 | return posix_spawn_file_actions_adddup2 (&actions, fd, 1); | |
89 | } | |
90 | ||
91 | static int | |
92 | adddup2_reverse (int fd) | |
93 | { | |
94 | return posix_spawn_file_actions_adddup2 (&actions, 1, fd); | |
95 | } | |
96 | ||
97 | static int | |
98 | addclose (int fd) | |
99 | { | |
100 | return posix_spawn_file_actions_addclose (&actions, fd); | |
101 | } | |
102 | ||
103 | static void | |
104 | all_functions (void) | |
105 | { | |
106 | all_tests ("addopen", addopen); | |
107 | all_tests ("adddup2", adddup2); | |
108 | all_tests ("adddup2", adddup2_reverse); | |
109 | all_tests ("adddup2", addclose); | |
110 | } | |
111 | ||
112 | static int | |
113 | do_test (void) | |
114 | { | |
115 | /* Try to eliminate the file descriptor limit. */ | |
116 | { | |
117 | struct rlimit limit; | |
118 | if (getrlimit (RLIMIT_NOFILE, &limit) < 0) | |
119 | { | |
120 | printf ("error: getrlimit: %m\n"); | |
121 | return 1; | |
122 | } | |
123 | limit.rlim_cur = RLIM_INFINITY; | |
124 | if (setrlimit (RLIMIT_NOFILE, &limit) < 0) | |
125 | printf ("warning: setrlimit: %m\n"); | |
126 | } | |
127 | ||
128 | maxfd = sysconf (_SC_OPEN_MAX); | |
129 | printf ("info: _SC_OPEN_MAX: %ld\n", maxfd); | |
130 | ||
131 | invalid_fd = dup (0); | |
132 | if (invalid_fd < 0) | |
133 | { | |
134 | printf ("error: dup: %m\n"); | |
135 | return 1; | |
136 | } | |
137 | if (close (invalid_fd) < 0) | |
138 | { | |
139 | printf ("error: close: %m\n"); | |
140 | return 1; | |
141 | } | |
142 | ||
143 | int ret = posix_spawn_file_actions_init (&actions); | |
144 | if (ret != 0) | |
145 | { | |
146 | errno = ret; | |
147 | printf ("error: posix_spawn_file_actions_init: %m\n"); | |
148 | return 1; | |
149 | } | |
150 | ||
151 | all_functions (); | |
152 | ||
153 | ret = posix_spawn_file_actions_destroy (&actions); | |
154 | if (ret != 0) | |
155 | { | |
156 | errno = ret; | |
157 | printf ("error: posix_spawn_file_actions_destroy: %m\n"); | |
158 | return 1; | |
159 | } | |
160 | ||
161 | return errors; | |
162 | } | |
163 | ||
164 | #define TEST_FUNCTION do_test () | |
165 | #include "../test-skeleton.c" |