1 /*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2015-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
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
37 #define TEST_FLOCK_EINVAL(cmd) test_flock_einval(cmd, #cmd)
38
39 #ifdef HAVE_TYPEOF
40 # define TYPEOF_FLOCK_OFF_T typeof(((struct_kernel_flock *) NULL)->l_len)
41 #else
42 # define TYPEOF_FLOCK_OFF_T off_t
43 #endif
44
45 static long
invoke_test_syscall(const unsigned int cmd,void * const p)46 invoke_test_syscall(const unsigned int cmd, void *const p)
47 {
48 const kernel_ulong_t fd = F8ILL_KULONG_MASK;
49 const kernel_ulong_t op = F8ILL_KULONG_MASK | cmd;
50
51 return syscall(TEST_SYSCALL_NR, fd, op, (unsigned long) p);
52 }
53
54 static void
test_flock_einval(const int cmd,const char * name)55 test_flock_einval(const int cmd, const char *name)
56 {
57 struct_kernel_flock fl = {
58 .l_type = F_RDLCK,
59 .l_start = (TYPEOF_FLOCK_OFF_T) 0xdefaced1facefeedULL,
60 .l_len = (TYPEOF_FLOCK_OFF_T) 0xdefaced2cafef00dULL
61 };
62 long rc = invoke_test_syscall(cmd, &fl);
63 printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET"
64 ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name,
65 (intmax_t) fl.l_start, (intmax_t) fl.l_len, sprintrc(rc));
66 }
67
68 static void
test_flock(void)69 test_flock(void)
70 {
71 TEST_FLOCK_EINVAL(F_SETLK);
72 TEST_FLOCK_EINVAL(F_SETLKW);
73
74 struct_kernel_flock fl = {
75 .l_type = F_RDLCK,
76 .l_len = FILE_LEN
77 };
78 long rc = invoke_test_syscall(F_SETLK, &fl);
79 printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET"
80 ", l_start=0, l_len=%d}) = %s\n",
81 TEST_SYSCALL_STR, FILE_LEN, sprintrc(rc));
82 if (rc)
83 return;
84
85 invoke_test_syscall(F_GETLK, &fl);
86 printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
87 ", l_start=0, l_len=%d, l_pid=0}) = 0\n",
88 TEST_SYSCALL_STR, FILE_LEN);
89
90 invoke_test_syscall(F_SETLK, &fl);
91 printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
92 ", l_start=0, l_len=%d}) = 0\n",
93 TEST_SYSCALL_STR, FILE_LEN);
94 }
95
96 static void
create_sample(void)97 create_sample(void)
98 {
99 char fname[] = TEST_SYSCALL_STR "_XXXXXX";
100
101 (void) close(0);
102 if (mkstemp(fname))
103 perror_msg_and_fail("mkstemp: %s", fname);
104 if (unlink(fname))
105 perror_msg_and_fail("unlink: %s", fname);
106 if (ftruncate(0, FILE_LEN))
107 perror_msg_and_fail("ftruncate");
108 }
109