source: branches/libc-0.6/src/libctests/glibc/posix/tst-spawn.c

Last change on this file was 2036, checked in by bird, 20 years ago

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1/* Tests for spawn.
2 Copyright (C) 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21#include <errno.h>
22#include <error.h>
23#include <fcntl.h>
24#include <spawn.h>
25#include <stdlib.h>
26#include <string.h>
27#include <unistd.h>
28#include <wait.h>
29#include <sys/param.h>
30
31
32/* Nonzero if the program gets called via `exec'. */
33static int restart;
34
35
36#define CMDLINE_OPTIONS \
37 { "restart", no_argument, &restart, 1 },
38
39/* Prototype for our test function. */
40extern void do_prepare (int argc, char *argv[]);
41extern int do_test (int argc, char *argv[]);
42
43/* We have a preparation function. */
44#define PREPARE do_prepare
45
46#include "../test-skeleton.c"
47
48
49/* Name of the temporary files. */
50static char *name1;
51static char *name2;
52static char *name3;
53
54/* The contents of our files. */
55static const char fd1string[] = "This file should get closed";
56static const char fd2string[] = "This file should stay opened";
57static const char fd3string[] = "This file will be opened";
58
59
60/* We have a preparation function. */
61void
62do_prepare (int argc, char *argv[])
63{
64 char name_len;
65
66 name_len = strlen (test_dir);
67 name1 = (char *) malloc (name_len + sizeof ("/spawnXXXXXX"));
68 mempcpy (mempcpy (name1, test_dir, name_len),
69 "/spawnXXXXXX", sizeof ("/spawnXXXXXX"));
70 add_temp_file (name1);
71
72 name2 = (char *) malloc (name_len + sizeof ("/spawnXXXXXX"));
73 mempcpy (mempcpy (name2, test_dir, name_len),
74 "/spawnXXXXXX", sizeof ("/spawnXXXXXX"));
75 add_temp_file (name2);
76
77 name3 = (char *) malloc (name_len + sizeof ("/spawnXXXXXX"));
78 mempcpy (mempcpy (name3, test_dir, name_len),
79 "/spawnXXXXXX", sizeof ("/spawnXXXXXX"));
80 add_temp_file (name3);
81}
82
83
84static int
85handle_restart (const char *fd1s, const char *fd2s, const char *fd3s,
86 const char *fd4s, const char *name)
87{
88 char buf[100];
89 int fd1;
90 int fd2;
91 int fd3;
92 int fd4;
93
94 /* First get the descriptors. */
95 fd1 = atol (fd1s);
96 fd2 = atol (fd2s);
97 fd3 = atol (fd3s);
98 fd4 = atol (fd4s);
99
100 /* Sanity check. */
101 if (fd1 == fd2)
102 error (EXIT_FAILURE, 0, "value of fd1 and fd2 is the same");
103 if (fd1 == fd3)
104 error (EXIT_FAILURE, 0, "value of fd1 and fd3 is the same");
105 if (fd1 == fd4)
106 error (EXIT_FAILURE, 0, "value of fd1 and fd4 is the same");
107 if (fd2 == fd3)
108 error (EXIT_FAILURE, 0, "value of fd2 and fd3 is the same");
109 if (fd2 == fd4)
110 error (EXIT_FAILURE, 0, "value of fd2 and fd4 is the same");
111 if (fd3 == fd4)
112 error (EXIT_FAILURE, 0, "value of fd3 and fd4 is the same");
113
114 /* First the easy part: read from the file descriptor which is
115 supposed to be open. */
116 if (lseek (fd2, 0, SEEK_CUR) != strlen (fd2string))
117 error (EXIT_FAILURE, errno, "file 2 not in right position");
118 /* The duped descriptor must have the same position. */
119 if (lseek (fd4, 0, SEEK_CUR) != strlen (fd2string))
120 error (EXIT_FAILURE, errno, "file 4 not in right position");
121 if (lseek (fd2, 0, SEEK_SET) != 0)
122 error (EXIT_FAILURE, 0, "cannot reset position in file 2");
123 if (lseek (fd4, 0, SEEK_CUR) != 0)
124 error (EXIT_FAILURE, errno, "file 4 not set back, too");
125 if (read (fd2, buf, sizeof buf) != strlen (fd2string))
126 error (EXIT_FAILURE, 0, "cannot read file 2");
127 if (memcmp (fd2string, buf, strlen (fd2string)) != 0)
128 error (EXIT_FAILURE, 0, "file 2 does not match");
129
130 /* Now read from the third file. */
131 if (read (fd3, buf, sizeof buf) != strlen (fd3string))
132 error (EXIT_FAILURE, 0, "cannot read file 3");
133 if (memcmp (fd3string, buf, strlen (fd3string)) != 0)
134 error (EXIT_FAILURE, 0, "file 3 does not match");
135 /* Try to write to the file. This should not be allowed. */
136 if (write (fd3, "boo!", 4) != -1 || errno != EBADF)
137 error (EXIT_FAILURE, 0, "file 3 is writable");
138
139 /* Now try to read the first file. First make sure it is not opened. */
140 if (lseek (fd1, 0, SEEK_CUR) != (off_t) -1 || errno != EBADF)
141 error (EXIT_FAILURE, 0, "file 1 (%d) is not closed", fd1);
142
143 /* Now open the file and read it. */
144 fd1 = open (name, O_RDONLY);
145 if (fd1 == -1)
146 error (EXIT_FAILURE, errno,
147 "cannot open first file \"%s\" for verification", name);
148
149 if (read (fd1, buf, sizeof buf) != strlen (fd1string))
150 error (EXIT_FAILURE, errno, "cannot read file 1");
151 if (memcmp (fd1string, buf, strlen (fd1string)) != 0)
152 error (EXIT_FAILURE, 0, "file 1 does not match");
153
154 return 0;
155}
156
157
158int
159do_test (int argc, char *argv[])
160{
161 pid_t pid;
162 int fd1;
163 int fd2;
164 int fd3;
165 int fd4;
166 int status;
167 posix_spawn_file_actions_t actions;
168 char fd1name[18];
169 char fd2name[18];
170 char fd3name[18];
171 char fd4name[18];
172 char *spargv[12];
173
174 /* We must have
175 - four parameters left of called initially
176 + path for ld.so
177 + "--library-path"
178 + the library path
179 + the application name
180 - five parameters left if called through re-execution
181 + file descriptor number which is supposed to be closed
182 + the open file descriptor
183 + the newly opened file descriptor
184 + thhe duped second descriptor
185 + the name of the closed descriptor
186 */
187 if (argc != (restart ? 6 : 5))
188 error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc);
189
190 if (restart)
191 return handle_restart (argv[1], argv[2], argv[3], argv[4], argv[5]);
192
193 /* Prepare the test. We are creating two files: one which file descriptor
194 will be marked with FD_CLOEXEC, another which is not. */
195
196 /* Open our test files. */
197 fd1 = mkstemp (name1);
198 if (fd1 == -1)
199 error (EXIT_FAILURE, errno, "cannot open test file `%s'", name1);
200 fd2 = mkstemp (name2);
201 if (fd2 == -1)
202 error (EXIT_FAILURE, errno, "cannot open test file `%s'", name2);
203 fd3 = mkstemp (name3);
204 if (fd3 == -1)
205 error (EXIT_FAILURE, errno, "cannot open test file `%s'", name3);
206
207 /* Write something in the files. */
208 if (write (fd1, fd1string, strlen (fd1string)) != strlen (fd1string))
209 error (EXIT_FAILURE, errno, "cannot write to first file");
210 if (write (fd2, fd2string, strlen (fd2string)) != strlen (fd2string))
211 error (EXIT_FAILURE, errno, "cannot write to second file");
212 if (write (fd3, fd3string, strlen (fd3string)) != strlen (fd3string))
213 error (EXIT_FAILURE, errno, "cannot write to third file");
214
215 /* Close the third file. It'll be opened by `spawn'. */
216 close (fd3);
217
218 /* Tell `spawn' what to do. */
219 if (posix_spawn_file_actions_init (&actions) != 0)
220 error (EXIT_FAILURE, errno, "posix_spawn_file_actions_init");
221 /* Close `fd1'. */
222 if (posix_spawn_file_actions_addclose (&actions, fd1) != 0)
223 error (EXIT_FAILURE, errno, "posix_spawn_file_actions_addclose");
224 /* We want to open the third file. */
225 if (posix_spawn_file_actions_addopen (&actions, fd3, name3,
226 O_RDONLY, 0666) != 0)
227 error (EXIT_FAILURE, errno, "posix_spawn_file_actions_addopen");
228 /* We dup the second descriptor. */
229 fd4 = MAX (2, MAX (fd1, MAX (fd2, fd3))) + 1;
230 if (posix_spawn_file_actions_adddup2 (&actions, fd2, fd4) != 0)
231 error (EXIT_FAILURE, errno, "posix_spawn_file_actions_adddup2");
232
233 /* Now spawn the process. */
234 snprintf (fd1name, sizeof fd1name, "%d", fd1);
235 snprintf (fd2name, sizeof fd2name, "%d", fd2);
236 snprintf (fd3name, sizeof fd3name, "%d", fd3);
237 snprintf (fd4name, sizeof fd4name, "%d", fd4);
238
239 spargv[0] = argv[1];
240 spargv[1] = argv[2];
241 spargv[2] = argv[3];
242 spargv[3] = argv[4];
243 spargv[4] = (char *) "--direct";
244 spargv[5] = (char *) "--restart";
245 spargv[6] = fd1name;
246 spargv[7] = fd2name;
247 spargv[8] = fd3name;
248 spargv[9] = fd4name;
249 spargv[10] = name1;
250 spargv[11] = NULL;
251
252 if (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ) != 0)
253 error (EXIT_FAILURE, errno, "posix_spawn");
254
255 /* Cleanup. */
256 if (posix_spawn_file_actions_destroy (&actions) != 0)
257 error (EXIT_FAILURE, errno, "posix_spawn_file_actions_destroy");
258
259 /* Wait for the child. */
260 if (waitpid (pid, &status, 0) != pid)
261 error (EXIT_FAILURE, errno, "wrong child");
262
263 if (WTERMSIG (status) != 0)
264 error (EXIT_FAILURE, 0, "Child terminated incorrectly");
265 status = WEXITSTATUS (status);
266
267 /* Remove the test files. */
268 unlink (name1);
269 unlink (name2);
270 unlink (name3);
271
272 return status;
273}
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