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/* This file is part of the KDE project
Copyright (C) 2003-2004 Werner Almesberger
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
#include <sys/stat.h>
#include "unistd.h"
/**
* @internal Canonical name: never ends with a slash
*/
static int resolve_path(char *path,char *result,char *pos)
{
if (*path == '/') {
*result = '/';
pos = result+1;
path++;
}
*pos = 0;
if (!*path)
return 0;
while (1) {
char *slash;
struct stat st;
slash = *path ? strchr(path,'/') : NULL;
if (slash)
*slash = 0;
if (!path[0] || (path[0] == '.' &&
(!path[1] || (path[1] == '.' && !path[2])))) {
pos--;
if (pos != result && path[0] && path[1])
while (*--pos != '/');
}
else {
strcpy(pos,path);
if (lstat(result,&st) < 0)
return -1;
if (S_ISLNK(st.st_mode)) {
char buf[PATH_MAX];
if (readlink(result,buf,sizeof(buf)) < 0)
return -1;
*pos = 0;
if (slash) {
*slash = '/';
strcat(buf,slash);
}
strcpy(path,buf);
if (*path == '/')
result[1] = 0;
pos = strchr(result,0);
continue;
}
pos = strchr(result,0);
}
if (slash) {
*pos++ = '/';
path = slash+1;
}
*pos = 0;
if (!slash)
break;
}
return 0;
}
/** @return the canonicalized absolute pathname */
KDEWIN32_EXPORT char *realpath(const char *path,char *resolved_path)
{
char cwd[PATH_MAX];
char *path_copy;
int res;
if (!*path) {
errno = ENOENT;
return NULL;
}
if (!getcwd(cwd,sizeof(cwd)))
return NULL;
strcpy(resolved_path,"/");
if (resolve_path(cwd,resolved_path,resolved_path))
return NULL;
strcat(resolved_path,"/");
path_copy = strdup(path);
if (!path_copy)
return NULL;
res = resolve_path(path_copy,resolved_path,strchr(resolved_path,0));
free(path_copy);
if (res)
return NULL;
return resolved_path;
}
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