1 /*
2 * Copyright (c) 2015 Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
3 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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 "tests.h"
30 #include <asm/unistd.h>
31
32 #ifdef __NR_readlink
33
34 # include <stdio.h>
35 # include <unistd.h>
36
37 # define PREFIX "test.readlink"
38 # define TARGET (PREFIX ".target")
39 # define LINKPATH (PREFIX ".link")
40
41 int
main(void)42 main(void)
43 {
44 const char * const fname = tail_memdup(LINKPATH, sizeof(LINKPATH));
45 const char * const hex_fname =
46 hexquote_strndup(fname, sizeof(LINKPATH) - 1);
47
48 const unsigned int size = sizeof(TARGET) - 1;
49 char * const buf = tail_alloc(size);
50
51 (void) unlink(fname);
52
53 long rc = syscall(__NR_readlink, fname, buf, size);
54 printf("readlink(\"%s\", %p, %u) = -1 ENOENT (%m)\n",
55 hex_fname, buf, size);
56
57 if (symlink(TARGET, fname))
58 perror_msg_and_fail("symlink");
59
60 rc = syscall(__NR_readlink, fname, buf, size);
61 if (rc < 0) {
62 perror("readlink");
63 (void) unlink(fname);
64 return 77;
65 }
66 const char * const hex_buf = hexquote_strndup(buf, size);
67 printf("readlink(\"%s\", \"%s\", %u) = %u\n",
68 hex_fname, hex_buf, size, size);
69
70 if (unlink(fname))
71 perror_msg_and_fail("unlink");
72
73 puts("+++ exited with 0 +++");
74 return 0;
75 }
76
77 #else
78
79 SKIP_MAIN_UNDEFINED("__NR_readlink")
80
81 #endif
82