source: trunk/src/sed/gnulib-tests/test-lseek.c@ 3619

Last change on this file since 3619 was 3611, checked in by bird, 14 months ago

vendor/sed/current: GNU sed 4.9 (sed-4.9.tar.xz sha256:6e226b732e1cd739464ad6862bd1a1aba42d7982922da7a53519631d24975181)
File size: 3.2 KB
Line 
1/* Test of lseek() function.
2 Copyright (C) 2007-2022 Free Software Foundation, Inc.
3
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.
8
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.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17/* Written by Eric Blake, 2007. */
18
19#include <config.h>
20
21#include <unistd.h>
22
23#include "signature.h"
24SIGNATURE_CHECK (lseek, off_t, (int, off_t, int));
25
26#include <errno.h>
27
28#include "macros.h"
29
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. */
33int
34main (int argc, char **argv)
35{
36 if (argc != 2)
37 return 2;
38 switch (*argv[1])
39 {
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);
44 errno = 0;
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);
49#endif
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);
53#endif
54 ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
55 errno = 0;
56 ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
57 ASSERT (errno == EINVAL);
58 errno = 0;
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);
63#endif
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);
67#endif
68 break;
69
70 case '1': /* pipes */
71 errno = 0;
72 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
73 ASSERT (errno == ESPIPE);
74 errno = 0;
75 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
76 ASSERT (errno == ESPIPE);
77 break;
78
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. */
82 close (0);
83 close (1);
84
85 errno = 0;
86 ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
87 ASSERT (errno == EBADF);
88
89 errno = 0;
90 ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
91 ASSERT (errno == EBADF);
92
93 /* Test behaviour for invalid file descriptors. */
94 errno = 0;
95 ASSERT (lseek (-1, (off_t)0, SEEK_CUR) == -1);
96 ASSERT (errno == EBADF);
97
98 close (99);
99 errno = 0;
100 ASSERT (lseek (99, (off_t)0, SEEK_CUR) == -1);
101 ASSERT (errno == EBADF);
102
103 break;
104
105 default:
106 return 1;
107 }
108 return 0;
109}
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