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, the error messages might not
38 always print, but at least the exit status will be reliable. */
39 #define ASSERT(expr) \
44 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
51 /* Code executed by the child process. argv[1] = "child". */
53 child_main (int argc, char *argv[])
60 /* Read one byte from fd 0, and write its value plus one to fd 1.
61 fd 2 should be closed iff the argument is 1. Check that no other file
62 descriptors leaked. */
64 ASSERT (read (STDIN_FILENO, buffer, 1) == 1);
67 ASSERT (write (STDOUT_FILENO, buffer, 1) == 1);
69 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
70 /* On Win32, the initial state of unassigned standard file descriptors is
71 that they are open but point to an INVALID_HANDLE_VALUE. Thus
72 close (STDERR_FILENO) would always succeed. */
73 switch (atoi (argv[2]))
76 /* Expect fd 2 is open to a valid handle. */
77 ASSERT ((HANDLE) _get_osfhandle (STDERR_FILENO) != INVALID_HANDLE_VALUE);
80 /* Expect fd 2 is pointing to INVALID_HANDLE_VALUE. */
81 ASSERT ((HANDLE) _get_osfhandle (STDERR_FILENO) == INVALID_HANDLE_VALUE);
87 /* On Unix, the initial state of unassigned standard file descriptors is
88 that they are closed. */
92 ret = fcntl (STDERR_FILENO, F_GETFL);
93 switch (atoi (argv[2]))
96 /* Expect fd 2 is open. */
100 /* Expect fd 2 is closed. */
102 ASSERT (errno == EBADF);
110 for (fd = 3; fd < 7; fd++)
113 ASSERT (close (fd) == -1);
114 ASSERT (errno == EBADF);
120 /* Create a bi-directional pipe to a test child, and validate that the
121 child program returns the expected output. The child is the same
122 program as the parent ARGV0, but with different arguments.
123 STDERR_CLOSED is true if we have already closed fd 2. */
125 test_pipe (const char *argv0, bool stderr_closed)
130 char buffer[2] = { 'a', 't' };
133 argv[0] = (char *) argv0;
134 argv[1] = (char *) "child";
135 argv[2] = (char *) (stderr_closed ? "1" : "0");
137 pid = create_pipe_bidi (argv0, argv0, argv, false, true, true, fd);
139 ASSERT (STDERR_FILENO < fd[0]);
140 ASSERT (STDERR_FILENO < fd[1]);
142 /* Push child's input. */
143 ASSERT (write (fd[1], buffer, 1) == 1);
145 /* Get child's output. */
146 ASSERT (read (fd[0], buffer, 2) == 1);
148 /* Wait for child. */
149 ASSERT (wait_subprocess (pid, argv0, true, false, true, true, NULL) == 0);
150 ASSERT (close (fd[0]) == 0);
151 ASSERT (close (fd[1]) == 0);
153 /* Check the result. */
154 ASSERT (buffer[0] == 'b');
155 ASSERT (buffer[1] == 't');
158 /* Code executed by the parent process. */
160 parent_main (int argc, char *argv[])
167 /* Selectively close various standard fds, to verify the child process is
168 not impacted by this. */
169 test = atoi (argv[1]);
204 /* Plug any file descriptor leaks inherited from outside world before
205 starting, so that child has a clean slate (at least for the fds that we
206 might be manipulating). */
207 for (fd = 3; fd < 7; fd++)
210 test_pipe (argv[0], test >= 4);
216 main (int argc, char *argv[])
219 if (strcmp (argv[1], "child") == 0)
220 return child_main (argc, argv);
222 return parent_main (argc, argv);