1 /* Test of create_pipe_bidi/wait_subprocess.
2 Copyright (C) 2009 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21 #include "wait-process.h"
23 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
24 /* Get declarations of the Win32 API functions. */
25 # define WIN32_LEAN_AND_MEAN
36 /* Depending on arguments, this test intentionally closes stderr or
37 starts life with stderr closed. So, we arrange to have fd 10
38 (outside the range of interesting fd's during the test) set up to
39 duplicate the original stderr. */
43 #define ASSERT(expr) \
48 fprintf (myerr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
55 /* Code executed by the child process. argv[1] = "child". */
57 child_main (int argc, char *argv[])
59 char buffer[2] = { 's', 't' };
64 /* Read one byte from fd 0, and write its value plus one to fd 1.
65 fd 2 should be closed iff the argument is 1. Check that no other file
66 descriptors leaked. */
68 ASSERT (read (STDIN_FILENO, buffer, 2) == 1);
71 ASSERT (write (STDOUT_FILENO, buffer, 1) == 1);
73 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
74 /* On Win32, the initial state of unassigned standard file descriptors is
75 that they are open but point to an INVALID_HANDLE_VALUE. Thus
76 close (STDERR_FILENO) would always succeed. */
77 switch (atoi (argv[2]))
80 /* Expect fd 2 is open to a valid handle. */
81 ASSERT ((HANDLE) _get_osfhandle (STDERR_FILENO) != INVALID_HANDLE_VALUE);
84 /* Expect fd 2 is pointing to INVALID_HANDLE_VALUE. */
85 ASSERT ((HANDLE) _get_osfhandle (STDERR_FILENO) == INVALID_HANDLE_VALUE);
91 /* On Unix, the initial state of unassigned standard file descriptors is
92 that they are closed. */
96 ret = fcntl (STDERR_FILENO, F_GETFL);
97 switch (atoi (argv[2]))
100 /* Expect fd 2 is open. */
104 /* Expect fd 2 is closed. */
106 ASSERT (errno == EBADF);
114 for (fd = 3; fd < 7; fd++)
117 ASSERT (close (fd) == -1);
118 ASSERT (errno == EBADF);
124 /* Create a bi-directional pipe to a test child, and validate that the
125 child program returns the expected output. The child is the same
126 program as the parent ARGV0, but with different arguments.
127 STDERR_CLOSED is true if we have already closed fd 2. */
129 test_pipe (const char *argv0, bool stderr_closed)
134 char buffer[2] = { 'a', 't' };
137 argv[0] = (char *) argv0;
138 argv[1] = (char *) "child";
139 argv[2] = (char *) (stderr_closed ? "1" : "0");
141 pid = create_pipe_bidi (argv0, argv0, argv, false, true, true, fd);
143 ASSERT (STDERR_FILENO < fd[0]);
144 ASSERT (STDERR_FILENO < fd[1]);
146 /* Push child's input. */
147 ASSERT (write (fd[1], buffer, 1) == 1);
148 ASSERT (close (fd[1]) == 0);
150 /* Get child's output. */
151 ASSERT (read (fd[0], buffer, 2) == 1);
153 /* Wait for child. */
154 ASSERT (wait_subprocess (pid, argv0, true, false, true, true, NULL) == 0);
155 ASSERT (close (fd[0]) == 0);
157 /* Check the result. */
158 ASSERT (buffer[0] == 'b');
159 ASSERT (buffer[1] == 't');
162 /* Code executed by the parent process. */
164 parent_main (int argc, char *argv[])
171 /* Selectively close various standard fds, to verify the child process is
172 not impacted by this. */
173 test = atoi (argv[1]);
208 /* Plug any file descriptor leaks inherited from outside world before
209 starting, so that child has a clean slate (at least for the fds that we
210 might be manipulating). */
211 for (fd = 3; fd < 7; fd++)
214 test_pipe (argv[0], test >= 4);
220 main (int argc, char *argv[])
224 fprintf (stderr, "%s: need arguments\n", argv[0]);
227 if (strcmp (argv[1], "child") == 0)
229 /* fd 2 might be closed, but fd 10 is the original stderr. */
230 myerr = fdopen (10, "w");
233 return child_main (argc, argv);
235 /* We might close fd 2 later, so save it in fd 10. */
236 if (dup2 (STDERR_FILENO, 10) != 10
237 || (myerr = fdopen (10, "w")) == NULL)
239 return parent_main (argc, argv);