1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 */
5
6 /*
7 * DESCRIPTION
8 * Testcase to check the basic functionality of the getcwd(2) system call.
9 * 1) getcwd(2) works fine if buf and size are valid.
10 * 2) getcwd(2) works fine if buf points to NULL and size is set to 0.
11 * 3) getcwd(2) works fine if buf points to NULL and size is greater than strlen(path).
12 */
13
14 #include <errno.h>
15 #include <unistd.h>
16 #include <stdlib.h>
17 #include <string.h>
18 #include <sys/types.h>
19 #include <sys/stat.h>
20
21 #include "tst_test.h"
22
23 static char exp_buf[PATH_MAX];
24 static char buffer[PATH_MAX];
25
26 static struct t_case {
27 char *buf;
28 size_t size;
29 } tcases[] = {
30 {buffer, sizeof(buffer)},
31 {NULL, 0},
32 {NULL, PATH_MAX}
33 };
34
dir_exists(const char * dirpath)35 static int dir_exists(const char *dirpath)
36 {
37 struct stat sb;
38
39 if (!stat(dirpath, &sb) && S_ISDIR(sb.st_mode))
40 return 1;
41
42 return 0;
43 }
44
verify_getcwd(unsigned int n)45 static void verify_getcwd(unsigned int n)
46 {
47 struct t_case *tc = &tcases[n];
48 char *res = NULL;
49
50 errno = 0;
51 res = getcwd(tc->buf, tc->size);
52 TST_ERR = errno;
53 if (!res) {
54 tst_res(TFAIL | TTERRNO, "getcwd() failed");
55 goto end;
56 }
57
58 if (strcmp(exp_buf, res)) {
59 tst_res(TFAIL, "getcwd() returned unexpected directory: %s, "
60 "expected: %s", res, exp_buf);
61 goto end;
62 }
63
64 tst_res(TPASS, "getcwd() returned expected directory: %s", res);
65
66 end:
67 if (!tc->buf)
68 free(res);
69 }
70
setup(void)71 static void setup(void)
72 {
73 const char *tmpdir = tst_get_tmpdir_root();
74
75 if (!dir_exists(tmpdir))
76 tst_brk(TBROK | TERRNO, "TMPDIR '%s' doesn't exist", tmpdir);
77
78 SAFE_CHDIR(tmpdir);
79
80 if (!realpath(tmpdir, exp_buf))
81 tst_brk(TBROK | TERRNO, "realpath() failed");
82
83 tst_res(TINFO, "Expected path '%s'", exp_buf);
84 }
85
86 static struct tst_test test = {
87 .setup = setup,
88 .tcnt = ARRAY_SIZE(tcases),
89 .test = verify_getcwd
90 };
91