1/* Basic sync_file_range (not specific flag is checked).
2 Copyright (C) 2016-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* sync_file_range is only define for LFS. */
20#define _FILE_OFFSET_BITS 64
21#include <errno.h>
22#include <fcntl.h>
23#include <limits.h>
24#include <stdint.h>
25#include <stdlib.h>
26#include <sys/stat.h>
27
28#include <support/temp_file.h>
29#include <support/check.h>
30
31#define XSTR(s) STR(S)
32#define STR(s) #s
33
34static char *temp_filename;
35static int temp_fd;
36
37static char fifoname[] = "/tmp/tst-posix_fadvise-fifo-XXXXXX";
38static int fifofd;
39
40void
41do_prepare (int argc, char **argv)
42{
43 temp_fd = create_temp_file (base: "tst-file_sync_range.", filename: &temp_filename);
44 if (temp_fd == -1)
45 FAIL_EXIT1 ("cannot create temporary file: %m");
46
47 if (mktemp (template: fifoname) == NULL)
48 FAIL_EXIT1 ("cannot generate temp file name: %m");
49 add_temp_file (name: fifoname);
50
51 if (mkfifo (path: fifoname, S_IWUSR | S_IRUSR) != 0)
52 FAIL_EXIT1 ("cannot create fifo: %m");
53
54 fifofd = open (file: fifoname, O_RDONLY | O_NONBLOCK);
55 if (fifofd == -1)
56 FAIL_EXIT1 ("cannot open fifo: %m");
57}
58#define PREPARE do_prepare
59
60static int
61do_test (void)
62{
63 int ret;
64
65 /* This tests first check for some invalid usage and then check for
66 a simple usage. It does not cover for all possible issue since for
67 EIO/ENOMEM/ENOSPC would require to create very specific scenarios that
68 are outside the current test coverage (basically correct kernel argument
69 passing. */
70
71 /* Check for invalid file descriptor. */
72 if ((ret = sync_file_range (fd: -1, offset: 0, count: 0, flags: 0)) != -1)
73 FAIL_EXIT1 ("sync_file_range did not fail on an invalid descriptor "
74 "(returned %d, expected -1)", ret);
75 if (errno != EBADF)
76 FAIL_EXIT1 ("sync_file_range on an invalid descriptor did not set errno to "
77 "EBADF (%d)", errno);
78
79 if ((ret = sync_file_range (fd: fifofd, offset: 0, count: 0, flags: 0)) != -1)
80 FAIL_EXIT1 ("sync_file_range did not fail on an invalid descriptor "
81 "(returned %d, expected -1)", ret);
82 if (errno != ESPIPE)
83 FAIL_EXIT1 ("sync_file_range on an invalid descriptor did not set errno to "
84 "EBADF (%d)", errno);
85
86 /* Check for invalid flags (it must be
87 SYNC_FILE_RANGE_{WAIT_BEFORE,WRITE,WAIT_AFTER) or a 'or' combination of
88 them. */
89 if ((ret = sync_file_range (fd: temp_fd, offset: 0, count: 0, flags: -1)) != -1)
90 FAIL_EXIT1 ("sync_file_range did not failed with invalid flags "
91 "(returned %d, " "expected -1)", ret);
92 if (errno != EINVAL)
93 FAIL_EXIT1 ("sync_file_range with invalid flag did not set errno to "
94 "EINVAL (%d)", errno);
95
96 /* Check for negative offset. */
97 if ((ret = sync_file_range (fd: temp_fd, offset: -1, count: 1, flags: 0)) != -1)
98 FAIL_EXIT1 ("sync_file_range did not failed with invalid offset "
99 "(returned %d, expected -1)", ret);
100 if (errno != EINVAL)
101 FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
102 "EINVAL (%d)", errno);
103
104 /* offset + nbytes must be a positive value. */
105 if ((ret = sync_file_range (fd: temp_fd, offset: 1024, count: -2048, flags: 0)) != -1)
106 FAIL_EXIT1 ("sync_file_range did not failed with invalid nbytes (returned %d, "
107 "expected -1)", ret);
108 if (errno != EINVAL)
109 FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
110 "EINVAL (%d)", errno);
111
112 /* offset + nbytes must be larger or equal than offset */
113 if ((ret = sync_file_range (fd: temp_fd, offset: -1024, count: 1024, flags: 0)) != -1)
114 FAIL_EXIT1 ("sync_file_range did not failed with invalid offset "
115 "(returned %d, expected -1)", ret);
116 if (errno != EINVAL)
117 FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
118 "EINVAL (%d)", errno);
119
120 /* Check simple successful case. */
121 if ((ret = sync_file_range (fd: temp_fd, offset: 0, count: 1024, flags: 0)) == -1)
122 FAIL_EXIT1 ("sync_file_range failed (errno = %d)", errno);
123
124 /* Finally check also a successful case with a 64-bit offset. */
125 off_t large_offset = UINT32_MAX + 2048LL;
126 if ((ret = sync_file_range (fd: temp_fd, offset: large_offset, count: 1024, flags: 0)) == -1)
127 FAIL_EXIT1 ("sync_file_range failed (errno = %d)", errno);
128
129 return 0;
130}
131
132#include <support/test-driver.c>
133

source code of glibc/sysdeps/unix/sysv/linux/tst-sync_file_range.c