Preserve stack alignment in i386 makecontext.
[glibc/pb-stable.git] / posix / tst-exec.c
blobf3971e8c97589a835e93411b9f53f34ec563ae64
1 /* Tests for exec.
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.
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.
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.
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. */
21 #include <errno.h>
22 #include <error.h>
23 #include <fcntl.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <unistd.h>
27 #include <wait.h>
30 /* Nonzero if the program gets called via `exec'. */
31 static int restart;
34 #define CMDLINE_OPTIONS \
35 { "restart", no_argument, &restart, 1 },
37 /* Prototype for our test function. */
38 extern void do_prepare (int argc, char *argv[]);
39 extern int do_test (int argc, char *argv[]);
41 /* We have a preparation function. */
42 #define PREPARE do_prepare
44 #include "../test-skeleton.c"
47 /* Name of the temporary files. */
48 static char *name1;
49 static char *name2;
51 /* The contents of our files. */
52 static const char fd1string[] = "This file should get closed";
53 static const char fd2string[] = "This file should stay opened";
56 /* We have a preparation function. */
57 void
58 do_prepare (int argc, char *argv[])
60 size_t name_len;
62 name_len = strlen (test_dir);
63 name1 = malloc (name_len + sizeof ("/execXXXXXX"));
64 mempcpy (mempcpy (name1, test_dir, name_len),
65 "/execXXXXXX", sizeof ("/execXXXXXX"));
66 add_temp_file (name1);
68 name2 = malloc (name_len + sizeof ("/execXXXXXX"));
69 mempcpy (mempcpy (name2, test_dir, name_len),
70 "/execXXXXXX", sizeof ("/execXXXXXX"));
71 add_temp_file (name2);
75 static int
76 handle_restart (const char *fd1s, const char *fd2s, const char *name)
78 char buf[100];
79 int fd1;
80 int fd2;
82 /* First get the descriptors. */
83 fd1 = atol (fd1s);
84 fd2 = atol (fd2s);
86 /* Sanity check. */
87 if (fd1 == fd2)
88 error (EXIT_FAILURE, 0, "value of fd1 and fd2 is the same");
90 /* First the easy part: read from the file descriptor which is
91 supposed to be open. */
92 if (lseek (fd2, 0, SEEK_CUR) != strlen (fd2string))
93 error (EXIT_FAILURE, errno, "file 2 not in right position");
94 if (lseek (fd2, 0, SEEK_SET) != 0)
95 error (EXIT_FAILURE, 0, "cannot reset position in file 2");
96 if (read (fd2, buf, sizeof buf) != strlen (fd2string))
97 error (EXIT_FAILURE, 0, "cannot read file 2");
98 if (memcmp (fd2string, buf, strlen (fd2string)) != 0)
99 error (EXIT_FAILURE, 0, "file 2 does not match");
101 /* No try to read the first file. First make sure it is not opened. */
102 if (lseek (fd1, 0, SEEK_CUR) != (off_t) -1 || errno != EBADF)
103 error (EXIT_FAILURE, 0, "file 1 (%d) is not closed", fd1);
105 /* Now open the file and read it. */
106 fd1 = open (name, O_RDONLY);
107 if (fd1 == -1)
108 error (EXIT_FAILURE, errno,
109 "cannot open first file \"%s\" for verification", name);
111 if (read (fd1, buf, sizeof buf) != strlen (fd1string))
112 error (EXIT_FAILURE, errno, "cannot read file 1");
113 if (memcmp (fd1string, buf, strlen (fd1string)) != 0)
114 error (EXIT_FAILURE, 0, "file 1 does not match");
116 return 0;
121 do_test (int argc, char *argv[])
123 pid_t pid;
124 int fd1;
125 int fd2;
126 int flags;
127 int status;
129 /* We must have
130 - four parameters left of called initially
131 + path for ld.so
132 + "--library-path"
133 + the library path
134 + the application name
135 - three parameters left if called through re-execution
136 + file descriptor number which is supposed to be closed
137 + the open file descriptor
138 + the name of the closed desriptor
141 if (restart)
143 if (argc != 4)
144 error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc);
146 return handle_restart (argv[1], argv[2], argv[3]);
149 if (argc != 5)
150 error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc);
152 /* Prepare the test. We are creating two files: one which file descriptor
153 will be marked with FD_CLOEXEC, another which is not. */
155 /* Open our test files. */
156 fd1 = mkstemp (name1);
157 if (fd1 == -1)
158 error (EXIT_FAILURE, errno, "cannot open test file `%s'", name1);
159 fd2 = mkstemp (name2);
160 if (fd2 == -1)
161 error (EXIT_FAILURE, errno, "cannot open test file `%s'", name2);
163 /* Set the bit. */
164 flags = fcntl (fd1, F_GETFD, 0);
165 if (flags < 0)
166 error (EXIT_FAILURE, errno, "cannot get flags");
167 flags |= FD_CLOEXEC;
168 if (fcntl (fd1, F_SETFD, flags) < 0)
169 error (EXIT_FAILURE, errno, "cannot set flags");
171 /* Write something in the files. */
172 if (write (fd1, fd1string, strlen (fd1string)) != strlen (fd1string))
173 error (EXIT_FAILURE, errno, "cannot write to first file");
174 if (write (fd2, fd2string, strlen (fd2string)) != strlen (fd2string))
175 error (EXIT_FAILURE, errno, "cannot write to second file");
177 /* We want to test the `exec' function. To do this we restart the program
178 with an additional parameter. But first create another process. */
179 pid = fork ();
180 if (pid == 0)
182 char fd1name[18];
183 char fd2name[18];
185 snprintf (fd1name, sizeof fd1name, "%d", fd1);
186 snprintf (fd2name, sizeof fd2name, "%d", fd2);
188 /* This is the child. Construct the command line. */
189 execl (argv[1], argv[1], argv[2], argv[3], argv[4], "--direct",
190 "--restart", fd1name, fd2name, name1, NULL);
192 error (EXIT_FAILURE, errno, "cannot exec");
194 else if (pid == (pid_t) -1)
195 error (EXIT_FAILURE, errno, "cannot fork");
197 /* Wait for the child. */
198 if (waitpid (pid, &status, 0) != pid)
199 error (EXIT_FAILURE, errno, "wrong child");
201 if (WTERMSIG (status) != 0)
202 error (EXIT_FAILURE, 0, "Child terminated incorrectly");
203 status = WEXITSTATUS (status);
205 /* Remove the test files. */
206 unlink (name1);
207 unlink (name2);
209 return status;