1 /* Test that openat works.
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 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. */
30 #define ASSERT(expr) \
35 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
42 #define BASE "test-openat.t"
44 #include "test-open.h"
46 static int dfd = AT_FDCWD;
48 /* Wrapper around openat to test open behavior. */
50 do_open (char const *name, int flags, ...)
56 va_start (arg, flags);
58 /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
59 creates crashing code when 'mode_t' is smaller than 'int'. */
60 mode = va_arg (arg, PROMOTED_MODE_T);
63 return openat (dfd, name, flags, mode);
65 return openat (dfd, name, flags);
74 result = test_open (do_open, false);
75 dfd = open (".", O_RDONLY);
77 ASSERT (test_open (do_open, false) == result);
78 ASSERT (close (dfd) == 0);
80 /* Check that even when *-safer modules are in use, plain openat can
81 land in fd 0. Do this test last, since it is destructive to
83 ASSERT (close (STDIN_FILENO) == 0);
84 ASSERT (openat (AT_FDCWD, ".", O_RDONLY) == STDIN_FILENO);
86 dfd = open (".", O_RDONLY);
87 ASSERT (STDIN_FILENO < dfd);
88 ASSERT (chdir ("..") == 0);
89 ASSERT (close (STDIN_FILENO) == 0);
90 ASSERT (openat (dfd, ".", O_RDONLY) == STDIN_FILENO);
91 ASSERT (close (dfd) == 0);