134168b28SEd Schouten /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */
234168b28SEd Schouten
334168b28SEd Schouten /*
434168b28SEd Schouten * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
534168b28SEd Schouten *
634168b28SEd Schouten * Permission to use, copy, modify, and distribute this software for any
734168b28SEd Schouten * purpose with or without fee is hereby granted, provided that the above
834168b28SEd Schouten * copyright notice and this permission notice appear in all copies.
934168b28SEd Schouten *
1034168b28SEd Schouten * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1134168b28SEd Schouten * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1234168b28SEd Schouten * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1334168b28SEd Schouten * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1434168b28SEd Schouten * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1534168b28SEd Schouten * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1634168b28SEd Schouten * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1734168b28SEd Schouten */
1834168b28SEd Schouten
1934168b28SEd Schouten #include <errno.h>
2034168b28SEd Schouten #include <libgen.h>
2134168b28SEd Schouten #include <stdlib.h>
2234168b28SEd Schouten #include <string.h>
2334168b28SEd Schouten #include <sys/param.h>
2434168b28SEd Schouten
25*d14f60e9SAlan Somers char * __freebsd11_basename_r(const char *path, char *bname);
26*d14f60e9SAlan Somers char * __freebsd11_basename(char *path);
27*d14f60e9SAlan Somers
2834168b28SEd Schouten char *
__freebsd11_basename_r(const char * path,char * bname)296c093deeSEd Schouten __freebsd11_basename_r(const char *path, char *bname)
3034168b28SEd Schouten {
3134168b28SEd Schouten const char *endp, *startp;
3234168b28SEd Schouten size_t len;
3334168b28SEd Schouten
3434168b28SEd Schouten /* Empty or NULL string gets treated as "." */
3534168b28SEd Schouten if (path == NULL || *path == '\0') {
3634168b28SEd Schouten bname[0] = '.';
3734168b28SEd Schouten bname[1] = '\0';
3834168b28SEd Schouten return (bname);
3934168b28SEd Schouten }
4034168b28SEd Schouten
4134168b28SEd Schouten /* Strip any trailing slashes */
4234168b28SEd Schouten endp = path + strlen(path) - 1;
4334168b28SEd Schouten while (endp > path && *endp == '/')
4434168b28SEd Schouten endp--;
4534168b28SEd Schouten
4634168b28SEd Schouten /* All slashes becomes "/" */
4734168b28SEd Schouten if (endp == path && *endp == '/') {
4834168b28SEd Schouten bname[0] = '/';
4934168b28SEd Schouten bname[1] = '\0';
5034168b28SEd Schouten return (bname);
5134168b28SEd Schouten }
5234168b28SEd Schouten
5334168b28SEd Schouten /* Find the start of the base */
5434168b28SEd Schouten startp = endp;
5534168b28SEd Schouten while (startp > path && *(startp - 1) != '/')
5634168b28SEd Schouten startp--;
5734168b28SEd Schouten
5834168b28SEd Schouten len = endp - startp + 1;
5934168b28SEd Schouten if (len >= MAXPATHLEN) {
6034168b28SEd Schouten errno = ENAMETOOLONG;
6134168b28SEd Schouten return (NULL);
6234168b28SEd Schouten }
6334168b28SEd Schouten memcpy(bname, startp, len);
6434168b28SEd Schouten bname[len] = '\0';
6534168b28SEd Schouten return (bname);
6634168b28SEd Schouten }
6734168b28SEd Schouten
6834168b28SEd Schouten char *
__freebsd11_basename(char * path)6934168b28SEd Schouten __freebsd11_basename(char *path)
7034168b28SEd Schouten {
7134168b28SEd Schouten static char *bname = NULL;
7234168b28SEd Schouten
7334168b28SEd Schouten if (bname == NULL) {
7434168b28SEd Schouten bname = (char *)malloc(MAXPATHLEN);
7534168b28SEd Schouten if (bname == NULL)
7634168b28SEd Schouten return (NULL);
7734168b28SEd Schouten }
786c093deeSEd Schouten return (__freebsd11_basename_r(path, bname));
7934168b28SEd Schouten }
8034168b28SEd Schouten
816c093deeSEd Schouten __sym_compat(basename_r, __freebsd11_basename_r, FBSD_1.2);
8234168b28SEd Schouten __sym_compat(basename, __freebsd11_basename, FBSD_1.0);
83