mirror of
https://github.com/php/php-src.git
synced 2024-11-26 03:16:33 +08:00
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| PHP version 4.0 |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1997, 1998, 1999, 2000 The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.02 of the PHP license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available at through the world-wide-web at |
|
|
| http://www.php.net/license/2_02.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. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Rasmus Lerdorf <rasmus@lerdorf.on.ca> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
/* $Id$ */
|
|
|
|
#include "php.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <sys/stat.h>
|
|
#include "ext/standard/pageinfo.h"
|
|
#include "safe_mode.h"
|
|
#include "SAPI.h"
|
|
|
|
/*
|
|
* php_checkuid
|
|
*
|
|
* This function has four modes:
|
|
*
|
|
* 0 - return invalid (0) if file does not exist
|
|
* 1 - return valid (1) if file does not exist
|
|
* 2 - if file does not exist, check directory
|
|
* 3 - only check directory (needed for mkdir)
|
|
*/
|
|
PHPAPI int php_checkuid(const char *fn, int mode) {
|
|
struct stat sb;
|
|
int ret;
|
|
long uid=0L, duid=0L;
|
|
char *s;
|
|
|
|
if (!fn) return(0); /* path must be provided */
|
|
|
|
/*
|
|
* If given filepath is a URL, allow - safe mode stuff
|
|
* related to URL's is checked in individual functions
|
|
*/
|
|
if (!strncasecmp(fn,"http://",7) || !strncasecmp(fn,"ftp://",6)) {
|
|
return(1);
|
|
}
|
|
|
|
if (mode<3) {
|
|
ret = V_STAT(fn,&sb);
|
|
if (ret<0 && mode < 2) {
|
|
php_error(E_WARNING,"Unable to access %s",fn);
|
|
return(mode);
|
|
}
|
|
if (ret>-1) {
|
|
uid=sb.st_uid;
|
|
if (uid==php_getuid()) return(1);
|
|
}
|
|
}
|
|
s = strrchr(fn,'/');
|
|
|
|
/* This loop gets rid of trailing slashes which could otherwise be
|
|
* used to confuse the function.
|
|
*/
|
|
while(s && *(s+1)=='\0' && s>fn) {
|
|
*s='\0';
|
|
s = strrchr(fn,'/');
|
|
}
|
|
|
|
if (s) {
|
|
*s='\0';
|
|
ret = V_STAT(fn,&sb);
|
|
*s='/';
|
|
if (ret<0) {
|
|
php_error(E_WARNING, "Unable to access %s",fn);
|
|
return(0);
|
|
}
|
|
duid = sb.st_uid;
|
|
} else {
|
|
s = emalloc(MAXPATHLEN+1);
|
|
if (!V_GETCWD(s,MAXPATHLEN)) {
|
|
php_error(E_WARNING, "Unable to access current working directory");
|
|
return(0);
|
|
}
|
|
ret = V_STAT(s,&sb);
|
|
efree(s);
|
|
if (ret<0) {
|
|
php_error(E_WARNING, "Unable to access %s",s);
|
|
return(0);
|
|
}
|
|
duid = sb.st_uid;
|
|
}
|
|
if (duid == (uid=php_getuid())) return(1);
|
|
else {
|
|
php_error(E_WARNING, "SAFE MODE Restriction in effect. The script whose uid is %ld is not allowed to access %s owned by uid %ld",uid,fn,duid);
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
|
|
PHPAPI char *php_get_current_user()
|
|
{
|
|
struct passwd *pwd;
|
|
struct stat *pstat;
|
|
SLS_FETCH();
|
|
|
|
if (SG(request_info).current_user) {
|
|
return SG(request_info).current_user;
|
|
}
|
|
|
|
/* FIXME: I need to have this somehow handled if
|
|
USE_SAPI is defined, because cgi will also be
|
|
interfaced in USE_SAPI */
|
|
|
|
pstat = sapi_get_stat();
|
|
|
|
if (!pstat) {
|
|
return empty_string;
|
|
}
|
|
|
|
if ((pwd=getpwuid(pstat->st_uid))==NULL) {
|
|
return empty_string;
|
|
}
|
|
SG(request_info).current_user_length = strlen(pwd->pw_name);
|
|
SG(request_info).current_user = estrndup(pwd->pw_name, SG(request_info).current_user_length);
|
|
|
|
return SG(request_info).current_user;
|
|
}
|