1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program.
16 */
17
18 /*
19 * DESCRIPTION
20 * Testcase to check the basic functionality of the getcwd(2) system call.
21 * 1) getcwd(2) works fine if buf and size are valid.
22 * 2) getcwd(2) works fine if buf points to NULL and size is set to 0.
23 * 3) getcwd(2) works fine if buf points to NULL and size is greater than strlen(path).
24 */
25
26 #include <errno.h>
27 #include <unistd.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/types.h>
31 #include <sys/stat.h>
32
33 #include "tst_test.h"
34
35 static char exp_buf[PATH_MAX];
36 static char buffer[PATH_MAX];
37
38 static struct t_case {
39 char *buf;
40 size_t size;
41 } tcases[] = {
42 {buffer, sizeof(buffer)},
43 {NULL, 0},
44 {NULL, PATH_MAX}
45 };
46
dir_exists(const char * dirpath)47 static int dir_exists(const char *dirpath)
48 {
49 struct stat sb;
50
51 if (!stat(dirpath, &sb) && S_ISDIR(sb.st_mode))
52 return 1;
53
54 return 0;
55 }
56
get_tmpdir_path(void)57 static const char *get_tmpdir_path(void)
58 {
59 char *tmpdir = "/tmp";
60
61 if (dir_exists(tmpdir))
62 goto done;
63
64 /* fallback to $TMPDIR */
65 tmpdir = getenv("TMPDIR");
66 if (!tmpdir)
67 tst_brk(TBROK | TERRNO, "Failed to get $TMPDIR");
68
69 if (tmpdir[0] != '/')
70 tst_brk(TBROK, "$TMPDIR must be an absolute path");
71
72 if (!dir_exists(tmpdir))
73 tst_brk(TBROK | TERRNO, "TMPDIR '%s' doesn't exist", tmpdir);
74
75 done:
76 return tmpdir;
77 }
78
verify_getcwd(unsigned int n)79 static void verify_getcwd(unsigned int n)
80 {
81 struct t_case *tc = &tcases[n];
82 char *res = NULL;
83
84 errno = 0;
85 res = getcwd(tc->buf, tc->size);
86 TST_ERR = errno;
87 if (!res) {
88 tst_res(TFAIL | TTERRNO, "getcwd() failed");
89 goto end;
90 }
91
92 if (strcmp(exp_buf, res)) {
93 tst_res(TFAIL, "getcwd() returned unexpected directory: %s, "
94 "expected: %s", res, exp_buf);
95 goto end;
96 }
97
98 tst_res(TPASS, "getcwd() returned expected directory: %s", res);
99
100 end:
101 if (!tc->buf)
102 free(res);
103 }
104
setup(void)105 static void setup(void)
106 {
107 const char *tmpdir = get_tmpdir_path();
108
109 SAFE_CHDIR(tmpdir);
110
111 if (!realpath(tmpdir, exp_buf))
112 tst_brk(TBROK | TERRNO, "realpath() failed");
113
114 tst_res(TINFO, "Expected path '%s'", exp_buf);
115 }
116
117 static struct tst_test test = {
118 .setup = setup,
119 .tcnt = ARRAY_SIZE(tcases),
120 .test = verify_getcwd
121 };
122