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. */
41 #define BACKUP_STDERR_FILENO 10
44 #define ASSERT(expr) \
49 fprintf (myerr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
56 /* Code executed by the child process. argv[1] = "child". */
58 child_main (int argc, char *argv[])
60 char buffer[2] = { 's', 't' };
65 /* Read one byte from fd 0, and write its value plus one to fd 1.
66 fd 2 should be closed iff the argument is 1. Check that no other file
67 descriptors leaked. */
69 ASSERT (read (STDIN_FILENO, buffer, 2) == 1);
72 ASSERT (write (STDOUT_FILENO, buffer, 1) == 1);
74 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
75 /* On Win32, the initial state of unassigned standard file descriptors is
76 that they are open but point to an INVALID_HANDLE_VALUE. Thus
77 close (STDERR_FILENO) would always succeed. */
78 switch (atoi (argv[2]))
81 /* Expect fd 2 is open to a valid handle. */
82 ASSERT ((HANDLE) _get_osfhandle (STDERR_FILENO) != INVALID_HANDLE_VALUE);
85 /* Expect fd 2 is pointing to INVALID_HANDLE_VALUE. */
86 ASSERT ((HANDLE) _get_osfhandle (STDERR_FILENO) == INVALID_HANDLE_VALUE);
92 /* On Unix, the initial state of unassigned standard file descriptors is
93 that they are closed. */
97 ret = fcntl (STDERR_FILENO, F_GETFL);
98 switch (atoi (argv[2]))
101 /* Expect fd 2 is open. */
105 /* Expect fd 2 is closed. */
107 ASSERT (errno == EBADF);
115 for (fd = 3; fd < 7; fd++)
118 ASSERT (close (fd) == -1);
119 ASSERT (errno == EBADF);
125 /* Create a bi-directional pipe to a test child, and validate that the
126 child program returns the expected output. The child is the same
127 program as the parent ARGV0, but with different arguments.
128 STDERR_CLOSED is true if we have already closed fd 2. */
130 test_pipe (const char *argv0, bool stderr_closed)
135 char buffer[2] = { 'a', 't' };
138 argv[0] = (char *) argv0;
139 argv[1] = (char *) "child";
140 argv[2] = (char *) (stderr_closed ? "1" : "0");
142 pid = create_pipe_bidi (argv0, argv0, argv, false, true, true, fd);
144 ASSERT (STDERR_FILENO < fd[0]);
145 ASSERT (STDERR_FILENO < fd[1]);
147 /* Push child's input. */
148 ASSERT (write (fd[1], buffer, 1) == 1);
149 ASSERT (close (fd[1]) == 0);
151 /* Get child's output. */
152 ASSERT (read (fd[0], buffer, 2) == 1);
154 /* Wait for child. */
155 ASSERT (wait_subprocess (pid, argv0, true, false, true, true, NULL) == 0);
156 ASSERT (close (fd[0]) == 0);
158 /* Check the result. */
159 ASSERT (buffer[0] == 'b');
160 ASSERT (buffer[1] == 't');
163 /* Code executed by the parent process. */
165 parent_main (int argc, char *argv[])
172 /* Selectively close various standard fds, to verify the child process is
173 not impacted by this. */
174 test = atoi (argv[1]);
209 /* Plug any file descriptor leaks inherited from outside world before
210 starting, so that child has a clean slate (at least for the fds that we
211 might be manipulating). */
212 for (fd = 3; fd < 7; fd++)
215 test_pipe (argv[0], test >= 4);
221 main (int argc, char *argv[])
225 fprintf (stderr, "%s: need arguments\n", argv[0]);
228 if (strcmp (argv[1], "child") == 0)
230 /* fd 2 might be closed, but fd BACKUP_STDERR_FILENO is the original
232 myerr = fdopen (BACKUP_STDERR_FILENO, "w");
235 return child_main (argc, argv);
237 /* We might close fd 2 later, so save it in fd 10. */
238 if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
239 || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
241 return parent_main (argc, argv);