/* vi: set sw=4 ts=4: *//* * simplify_path implementation for busybox * * Copyright (C) 2001  Manuel Novoa III  <mjn3@opensource.lineo.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */#include <stdlib.h>#include "libbb.h"char *simplify_path(const char *path){	char *s, *start, *p;	if (path[0] == '/')		start = xstrdup(path);	else {		s = xgetcwd(NULL);		start = concat_path_file(s, path);		free(s);	}	p = s = start;	do {		if (*p == '/') {			if (*s == '/') {	/* skip duplicate (or initial) slash */				continue;			} else if (*s == '.') {				if (s[1] == '/' || s[1] == 0) {	/* remove extra '.' */					continue;				} else if ((s[1] == '.') && (s[2] == '/' || s[2] == 0)) {					++s;					if (p > start) {						while (*--p != '/');	/* omit previous dir */					}					continue;				}			}		}		*++p = *s;	} while (*++s);	if ((p == start) || (*p != '/')) {	/* not a trailing slash */		++p;					/* so keep last character */	}	*p = 0;	return start;}