1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini dirname function. 4 * 5 * Copyright (C) 2001 Matt Kraai. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22#include <string.h> 23#include "libbb.h" 24 25/* Return a string on the heap containing the directory component of PATH. */ 26 27char *dirname(const char *path) 28{ 29 const char *s; 30 31 /* Go to the end of the string. */ 32 s = path + strlen(path) - 1; 33 34 /* Strip off trailing /s (unless it is also the leading /). */ 35 while (path < s && s[0] == '/') 36 s--; 37 38 /* Strip the last component. */ 39 while (path <= s && s[0] != '/') 40 s--; 41 42 while (path < s && s[0] == '/') 43 s--; 44 45 if (s < path) 46 return xstrdup ("."); 47 else 48 return xstrndup (path, s - path + 1); 49} 50