1 /* Test that openat works.
2 Copyright (C) 2009-2011 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 of the License, or
7 (at your option) any later version.
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, see <http://www.gnu.org/licenses/>. */
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
23 #include "signature.h"
24 SIGNATURE_CHECK (openat, int, (int, char const *, int, ...));
35 #define BASE "test-openat.t"
37 #include "test-open.h"
39 static int dfd = AT_FDCWD;
41 /* Wrapper around openat to test open behavior. */
43 do_open (char const *name, int flags, ...)
49 va_start (arg, flags);
51 /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
52 creates crashing code when 'mode_t' is smaller than 'int'. */
53 mode = va_arg (arg, PROMOTED_MODE_T);
56 return openat (dfd, name, flags, mode);
58 return openat (dfd, name, flags);
62 main (int argc _GL_UNUSED, char *argv[])
66 set_program_name (argv[0]);
69 result = test_open (do_open, false);
70 dfd = open (".", O_RDONLY);
72 ASSERT (test_open (do_open, false) == result);
73 ASSERT (close (dfd) == 0);
75 /* Check that even when *-safer modules are in use, plain openat can
76 land in fd 0. Do this test last, since it is destructive to
78 ASSERT (close (STDIN_FILENO) == 0);
79 ASSERT (openat (AT_FDCWD, ".", O_RDONLY) == STDIN_FILENO);
81 dfd = open (".", O_RDONLY);
82 ASSERT (STDIN_FILENO < dfd);
83 ASSERT (chdir ("..") == 0);
84 ASSERT (close (STDIN_FILENO) == 0);
85 ASSERT (openat (dfd, ".", O_RDONLY) == STDIN_FILENO);
86 ASSERT (close (dfd) == 0);