1 /* Test of lseek() function.
2 Copyright (C) 2007-2009 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, 2007. */
23 #include "signature.h"
24 SIGNATURE_CHECK (lseek, off_t, (int, off_t, int));
29 #define ASSERT(expr) \
34 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
41 /* ARGC must be 2; *ARGV[1] is '0' if stdin and stdout are files, '1'
42 if they are pipes, and '2' if they are closed. Check for proper
43 semantics of lseek. */
45 main (int argc, char **argv)
51 case '0': /* regular files */
52 ASSERT (lseek (0, (off_t)2, SEEK_SET) == 2);
53 ASSERT (lseek (0, (off_t)-4, SEEK_CUR) == -1);
54 ASSERT (errno == EINVAL);
56 #if ! defined __BEOS__
57 /* POSIX says that the last lseek call, when failing, does not change
58 the current offset. But BeOS sets it to 0. */
59 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
61 #if 0 /* leads to SIGSYS on IRIX 6.5 */
62 ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
63 ASSERT (errno == EINVAL);
65 ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
67 ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
68 ASSERT (errno == EINVAL);
70 #if ! defined __BEOS__
71 /* POSIX says that the last lseek call, when failing, does not change
72 the current offset. But BeOS sets it to 0. */
73 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
75 #if 0 /* leads to SIGSYS on IRIX 6.5 */
76 ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
77 ASSERT (errno == EINVAL);
83 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
84 ASSERT (errno == ESPIPE);
86 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
87 ASSERT (errno == ESPIPE);
90 case '2': /* closed */
91 /* Explicitly close file descriptors 0 and 1. The <&- and >&- in the
92 invoking shell are not enough on HP-UX. */
96 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
97 ASSERT (errno == EBADF);
99 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
100 ASSERT (errno == EBADF);