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115 lines
2.6 KiB
115 lines
2.6 KiB
15 years ago
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/* This file is part of the KDE project
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Copyright (C) 2003-2004 Werner Almesberger
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <limits.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include "unistd.h"
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/**
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* @internal Canonical name: never ends with a slash
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*/
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static int resolve_path(char *path,char *result,char *pos)
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{
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if (*path == '/') {
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*result = '/';
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pos = result+1;
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path++;
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}
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*pos = 0;
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if (!*path)
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return 0;
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while (1) {
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char *slash;
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struct stat st;
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slash = *path ? strchr(path,'/') : NULL;
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if (slash)
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*slash = 0;
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if (!path[0] || (path[0] == '.' &&
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(!path[1] || (path[1] == '.' && !path[2])))) {
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pos--;
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if (pos != result && path[0] && path[1])
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while (*--pos != '/');
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}
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else {
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strcpy(pos,path);
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if (lstat(result,&st) < 0)
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return -1;
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if (S_ISLNK(st.st_mode)) {
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char buf[PATH_MAX];
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if (readlink(result,buf,sizeof(buf)) < 0)
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return -1;
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*pos = 0;
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if (slash) {
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*slash = '/';
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strcat(buf,slash);
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}
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strcpy(path,buf);
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if (*path == '/')
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result[1] = 0;
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pos = strchr(result,0);
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continue;
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}
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pos = strchr(result,0);
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}
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if (slash) {
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*pos++ = '/';
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path = slash+1;
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}
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*pos = 0;
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if (!slash)
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break;
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}
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return 0;
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}
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/** @return the canonicalized absolute pathname */
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KDEWIN32_EXPORT char *realpath(const char *path,char *resolved_path)
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{
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char cwd[PATH_MAX];
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char *path_copy;
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int res;
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if (!*path) {
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errno = ENOENT;
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return NULL;
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}
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if (!getcwd(cwd,sizeof(cwd)))
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return NULL;
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strcpy(resolved_path,"/");
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if (resolve_path(cwd,resolved_path,resolved_path))
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return NULL;
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strcat(resolved_path,"/");
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path_copy = strdup(path);
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if (!path_copy)
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return NULL;
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res = resolve_path(path_copy,resolved_path,strchr(resolved_path,0));
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free(path_copy);
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if (res)
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return NULL;
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return resolved_path;
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}
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