1 /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */
2
3 /*
4 * Copyright (c) 1997, 2004 Todd C. Miller <[email protected]>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD$");
21
22 #include <errno.h>
23 #include <libgen.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <sys/param.h>
27
28 char * __freebsd11_basename_r(const char *path, char *bname);
29 char * __freebsd11_basename(char *path);
30
31 char *
__freebsd11_basename_r(const char * path,char * bname)32 __freebsd11_basename_r(const char *path, char *bname)
33 {
34 const char *endp, *startp;
35 size_t len;
36
37 /* Empty or NULL string gets treated as "." */
38 if (path == NULL || *path == '\0') {
39 bname[0] = '.';
40 bname[1] = '\0';
41 return (bname);
42 }
43
44 /* Strip any trailing slashes */
45 endp = path + strlen(path) - 1;
46 while (endp > path && *endp == '/')
47 endp--;
48
49 /* All slashes becomes "/" */
50 if (endp == path && *endp == '/') {
51 bname[0] = '/';
52 bname[1] = '\0';
53 return (bname);
54 }
55
56 /* Find the start of the base */
57 startp = endp;
58 while (startp > path && *(startp - 1) != '/')
59 startp--;
60
61 len = endp - startp + 1;
62 if (len >= MAXPATHLEN) {
63 errno = ENAMETOOLONG;
64 return (NULL);
65 }
66 memcpy(bname, startp, len);
67 bname[len] = '\0';
68 return (bname);
69 }
70
71 char *
__freebsd11_basename(char * path)72 __freebsd11_basename(char *path)
73 {
74 static char *bname = NULL;
75
76 if (bname == NULL) {
77 bname = (char *)malloc(MAXPATHLEN);
78 if (bname == NULL)
79 return (NULL);
80 }
81 return (__freebsd11_basename_r(path, bname));
82 }
83
84 __sym_compat(basename_r, __freebsd11_basename_r, FBSD_1.2);
85 __sym_compat(basename, __freebsd11_basename, FBSD_1.0);
86