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 <Todd.Miller@courtesan.com>
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 <errno.h>
20 #include <libgen.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <sys/param.h>
24
25 char * __freebsd11_basename_r(const char *path, char *bname);
26 char * __freebsd11_basename(char *path);
27
28 char *
__freebsd11_basename_r(const char * path,char * bname)29 __freebsd11_basename_r(const char *path, char *bname)
30 {
31 const char *endp, *startp;
32 size_t len;
33
34 /* Empty or NULL string gets treated as "." */
35 if (path == NULL || *path == '\0') {
36 bname[0] = '.';
37 bname[1] = '\0';
38 return (bname);
39 }
40
41 /* Strip any trailing slashes */
42 endp = path + strlen(path) - 1;
43 while (endp > path && *endp == '/')
44 endp--;
45
46 /* All slashes becomes "/" */
47 if (endp == path && *endp == '/') {
48 bname[0] = '/';
49 bname[1] = '\0';
50 return (bname);
51 }
52
53 /* Find the start of the base */
54 startp = endp;
55 while (startp > path && *(startp - 1) != '/')
56 startp--;
57
58 len = endp - startp + 1;
59 if (len >= MAXPATHLEN) {
60 errno = ENAMETOOLONG;
61 return (NULL);
62 }
63 memcpy(bname, startp, len);
64 bname[len] = '\0';
65 return (bname);
66 }
67
68 char *
__freebsd11_basename(char * path)69 __freebsd11_basename(char *path)
70 {
71 static char *bname = NULL;
72
73 if (bname == NULL) {
74 bname = (char *)malloc(MAXPATHLEN);
75 if (bname == NULL)
76 return (NULL);
77 }
78 return (__freebsd11_basename_r(path, bname));
79 }
80
81 __sym_compat(basename_r, __freebsd11_basename_r, FBSD_1.2);
82 __sym_compat(basename, __freebsd11_basename, FBSD_1.0);
83