1 /*
2 * Copyright (c) 2007 Bret S. Lambert <blambert@gsipt.net>
3 *
4 * Public domain.
5 */
6
7 #include <libgen.h>
8 #include <stdio.h>
9 #include <string.h>
10 #include <limits.h>
11 #include <errno.h>
12 #include <err.h>
13
14 int
main(void)15 main(void)
16 {
17 char path[2 * PATH_MAX];
18 char dname[128];
19 const char *dir = "junk";
20 const char *fname = "/file.name.ext";
21 char *str;
22 int i;
23
24 /* Test normal functioning */
25 strlcpy(path, "/", sizeof(path));
26 strlcpy(dname, "/", sizeof(dname));
27 strlcat(path, dir, sizeof(path));
28 strlcat(dname, dir, sizeof(dname));
29 strlcat(path, fname, sizeof(path));
30 str = dirname(path);
31 if (strcmp(str, dname) != 0)
32 errx(1, "0: dirname(%s) = %s != %s", path, str, dname);
33
34 /*
35 * There are four states that require special handling:
36 *
37 * 1) path is NULL
38 * 2) path is the empty string
39 * 3) path is composed entirely of slashes
40 * 4) the resulting name is larger than PATH_MAX
41 *
42 * The first two cases require that a pointer
43 * to the string "." be returned.
44 *
45 * The third case requires that a pointer
46 * to the string "/" be returned.
47 *
48 * The final case requires that NULL be returned
49 * and errno * be set to ENAMETOOLONG.
50 */
51 /* Case 1 */
52 str = dirname(NULL);
53 if (strcmp(str, ".") != 0)
54 errx(1, "1: dirname(NULL) = %s != .", str);
55
56 /* Case 2 */
57 strlcpy(path, "", sizeof(path));
58 str = dirname(path);
59 if (strcmp(str, ".") != 0)
60 errx(1, "2: dirname(%s) = %s != .", path, str);
61
62 /* Case 3 */
63 for (i = 0; i < PATH_MAX - 1; i++)
64 strlcat(path, "/", sizeof(path)); /* path cleared above */
65 str = dirname(path);
66 if (strcmp(str, "/") != 0)
67 errx(1, "3: dirname(%s) = %s != /", path, str);
68
69 /* Case 4 */
70 strlcpy(path, "/", sizeof(path)); /* reset path */
71 for (i = 0; i <= PATH_MAX; i += strlen(dir))
72 strlcat(path, dir, sizeof(path));
73 strlcat(path, fname, sizeof(path));
74 str = dirname(path);
75 if (str != NULL)
76 errx(1, "4: dirname(%s) = %s != NULL", path, str);
77 if (errno != ENAMETOOLONG)
78 errx(1, "4: dirname(%s) sets errno to %d", path, errno);
79
80 return (0);
81 }
82