1 /* Test of lseek() function.
2 Copyright (C) 2007-2014 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));
30 /* ARGC must be 2; *ARGV[1] is '0' if stdin and stdout are files, '1'
31 if they are pipes, and '2' if they are closed. Check for proper
32 semantics of lseek. */
34 main (int argc, char **argv)
40 case '0': /* regular files */
41 ASSERT (lseek (0, (off_t)2, SEEK_SET) == 2);
42 ASSERT (lseek (0, (off_t)-4, SEEK_CUR) == -1);
43 ASSERT (errno == EINVAL);
45 #if ! defined __BEOS__
46 /* POSIX says that the last lseek call, when failing, does not change
47 the current offset. But BeOS sets it to 0. */
48 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
50 #if 0 /* leads to SIGSYS on IRIX 6.5 */
51 ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
52 ASSERT (errno == EINVAL);
54 ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
56 ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
57 ASSERT (errno == EINVAL);
59 #if ! defined __BEOS__
60 /* POSIX says that the last lseek call, when failing, does not change
61 the current offset. But BeOS sets it to 0. */
62 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
64 #if 0 /* leads to SIGSYS on IRIX 6.5 */
65 ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
66 ASSERT (errno == EINVAL);
72 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
73 ASSERT (errno == ESPIPE);
75 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
76 ASSERT (errno == ESPIPE);
79 case '2': /* closed */
80 /* Explicitly close file descriptors 0 and 1. The <&- and >&- in the
81 invoking shell are not enough on HP-UX. */
86 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
87 ASSERT (errno == EBADF);
90 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
91 ASSERT (errno == EBADF);
93 /* Test behaviour for invalid file descriptors. */
95 ASSERT (lseek (-1, (off_t)0, SEEK_CUR) == -1);
96 ASSERT (errno == EBADF);
100 ASSERT (lseek (99, (off_t)0, SEEK_CUR) == -1);
101 ASSERT (errno == EBADF);