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|
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: |
+----------------------------------------------------------------------+
*/
#include "php.h"
#if defined(HAVE_SYMLINK) || defined(PHP_WIN32)
#ifdef PHP_WIN32
#include <WinBase.h>
#endif
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef PHP_WIN32
#include <sys/stat.h>
#endif
#include <string.h>
#ifdef HAVE_PWD_H
#ifdef PHP_WIN32
#include "win32/pwd.h"
#else
#include <pwd.h>
#endif
#endif
#ifdef HAVE_GRP_H
# include <grp.h>
#endif
#include <errno.h>
#include <ctype.h>
#include "php_string.h"
#ifndef VOLUME_NAME_NT
#define VOLUME_NAME_NT 0x2
#endif
#ifndef VOLUME_NAME_DOS
#define VOLUME_NAME_DOS 0x0
#endif
/* {{{ Return the target of a symbolic link */
PHP_FUNCTION(readlink)
{
char *link;
size_t link_len;
char buff[MAXPATHLEN];
ssize_t ret;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_PATH(link, link_len)
ZEND_PARSE_PARAMETERS_END();
if (php_check_open_basedir(link)) {
RETURN_FALSE;
}
ret = php_sys_readlink(link, buff, MAXPATHLEN-1);
if (ret == -1) {
#ifdef PHP_WIN32
php_error_docref(NULL, E_WARNING, "readlink failed to read the symbolic link (%s), error %d", link, GetLastError());
#else
php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
#endif
RETURN_FALSE;
}
/* Append NULL to the end of the string */
buff[ret] = '\0';
RETURN_STRINGL(buff, ret);
}
/* }}} */
/* {{{ Returns the st_dev field of the UNIX C stat structure describing the link */
PHP_FUNCTION(linkinfo)
{
char *link;
char *dirname;
size_t link_len;
zend_stat_t sb = {0};
int ret;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_PATH(link, link_len)
ZEND_PARSE_PARAMETERS_END();
// TODO Check for empty string
dirname = estrndup(link, link_len);
zend_dirname(dirname, link_len);
if (php_check_open_basedir(dirname)) {
efree(dirname);
RETURN_FALSE;
}
ret = VCWD_LSTAT(link, &sb);
if (ret == -1) {
php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
efree(dirname);
RETURN_LONG(Z_L(-1));
}
efree(dirname);
RETURN_LONG((zend_long) sb.st_dev);
}
/* }}} */
/* {{{ Create a symbolic link */
PHP_FUNCTION(symlink)
{
char *topath, *frompath;
size_t topath_len, frompath_len;
int ret;
char source_p[MAXPATHLEN];
char dest_p[MAXPATHLEN];
char dirname[MAXPATHLEN];
size_t len;
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_PATH(topath, topath_len)
Z_PARAM_PATH(frompath, frompath_len)
ZEND_PARSE_PARAMETERS_END();
if (!expand_filepath(frompath, source_p)) {
php_error_docref(NULL, E_WARNING, "No such file or directory");
RETURN_FALSE;
}
memcpy(dirname, source_p, sizeof(source_p));
len = zend_dirname(dirname, strlen(dirname));
if (!expand_filepath_ex(topath, dest_p, dirname, len)) {
php_error_docref(NULL, E_WARNING, "No such file or directory");
RETURN_FALSE;
}
if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) ||
php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) )
{
php_error_docref(NULL, E_WARNING, "Unable to symlink to a URL");
RETURN_FALSE;
}
if (php_check_open_basedir(dest_p)) {
RETURN_FALSE;
}
if (php_check_open_basedir(source_p)) {
RETURN_FALSE;
}
/* For the source, an expanded path must be used (in ZTS an other thread could have changed the CWD).
* For the target the exact string given by the user must be used, relative or not, existing or not.
* The target is relative to the link itself, not to the CWD. */
ret = php_sys_symlink(topath, source_p);
if (ret == -1) {
php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
/* {{{ Create a hard link */
PHP_FUNCTION(link)
{
char *topath, *frompath;
size_t topath_len, frompath_len;
int ret;
char source_p[MAXPATHLEN];
char dest_p[MAXPATHLEN];
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_PATH(topath, topath_len)
Z_PARAM_PATH(frompath, frompath_len)
ZEND_PARSE_PARAMETERS_END();
if (!expand_filepath(frompath, source_p) || !expand_filepath(topath, dest_p)) {
php_error_docref(NULL, E_WARNING, "No such file or directory");
RETURN_FALSE;
}
if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) ||
php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) )
{
php_error_docref(NULL, E_WARNING, "Unable to link to a URL");
RETURN_FALSE;
}
if (php_check_open_basedir(dest_p)) {
RETURN_FALSE;
}
if (php_check_open_basedir(source_p)) {
RETURN_FALSE;
}
#ifndef ZTS
ret = php_sys_link(topath, frompath);
#else
ret = php_sys_link(dest_p, source_p);
#endif
if (ret == -1) {
php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
#endif
|
