1 /* vi: set sw=4 ts=4: */
3 * simplify_path implementation for busybox
6 * Copyright (C) 2001 Vladimir N. Oleynik <dzo@simtreas.ru>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 static inline char *strcpy_overlap(char *dst, const char *src)
33 do *dst++ = *src; while (*src++);
37 char *simplify_path(const char *path)
39 char *s, *start, *next;
42 start = xstrdup(path);
45 start = concat_path_file(s, path);
51 if(*s++ == '/' && (*s == '/' || *s == 0)) {
52 /* remove duplicate and trailing slashes */
53 s = strcpy_overlap(s-1, s);
55 else if(*(s-1) == '.' && *(s-2)=='/') {
56 if(*s == '/' || *s == 0) {
58 s = strcpy_overlap(s-1, s); /* maybe set // */
60 } else if(*s == '.') {
61 next = s+1; /* set after ".." */
62 if(*next == '/' || *next == 0) { /* "../" */
64 /* skip previous dir */
65 do s--; while(*s != '/');
66 /* remove previous dir */
67 strcpy_overlap(s, next);