1/*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <errno.h>
29#include <stdio.h>
30#include <stdint.h>
31#include <stdlib.h>
32#include <unistd.h>
33#include "flock.h"
34
35#define FILE_LEN 4096
36#define EINVAL_STR "-1 EINVAL (Invalid argument)"
37
38# define TEST_SYSCALL_STR stringify(TEST_SYSCALL_NAME)
39# define stringify(arg) stringify_(arg)
40# define stringify_(arg) #arg
41
42#define TEST_SYSCALL_NR nrify(TEST_SYSCALL_NAME)
43#define nrify(arg) nrify_(arg)
44#define nrify_(arg) __NR_ ## arg
45
46#define TEST_FLOCK_EINVAL(cmd) test_flock_einval(cmd, #cmd)
47
48static void
49test_flock_einval(const int cmd, const char *name)
50{
51	struct_kernel_flock fl = {
52		.l_type = F_RDLCK,
53		.l_start = (off_t) 0xdefaced1facefeed,
54		.l_len = (off_t) 0xdefaced2cafef00d
55	};
56	syscall(TEST_SYSCALL_NR, 0, cmd, &fl);
57	printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET"
58	       ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name,
59	       (intmax_t) fl.l_start, (intmax_t) fl.l_len, EINVAL_STR);
60}
61
62static void
63test_flock(void)
64{
65	TEST_FLOCK_EINVAL(F_SETLK);
66	TEST_FLOCK_EINVAL(F_SETLKW);
67
68	struct_kernel_flock fl = {
69		.l_type = F_RDLCK,
70		.l_len = FILE_LEN
71	};
72	int rc = syscall(TEST_SYSCALL_NR, 0, F_SETLK, &fl);
73	printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET"
74	       ", l_start=0, l_len=%d}) = %s\n",
75	       TEST_SYSCALL_STR, FILE_LEN, rc ? EINVAL_STR : "0");
76	if (rc)
77		return;
78
79	syscall(TEST_SYSCALL_NR, 0, F_GETLK, &fl);
80	printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
81	       ", l_start=0, l_len=%d, l_pid=0}) = 0\n",
82	       TEST_SYSCALL_STR, FILE_LEN);
83
84	syscall(TEST_SYSCALL_NR, 0, F_SETLK, &fl);
85	printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
86	       ", l_start=0, l_len=%d}) = 0\n",
87	       TEST_SYSCALL_STR, FILE_LEN);
88}
89
90static int
91create_sample(void)
92{
93	char fname[] = TEST_SYSCALL_STR "_XXXXXX";
94
95	(void) close(0);
96	return mkstemp(fname) || unlink(fname) || ftruncate(0, FILE_LEN) ? 77 : 0;
97}
98