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
48 static void
test_flock_einval(const int cmd,const char * name)49 test_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
62 static void
test_flock(void)63 test_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
90 static int
create_sample(void)91 create_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