php-src/ext/standard/pageinfo.c

/*
   +----------------------------------------------------------------------+
   | PHP version 4.0                                                      |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997, 1998, 1999 The PHP Group                         |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.0 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_0.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: Jim Winstead <jimw@php.net>                                 |
   +----------------------------------------------------------------------+
 */
/* $Id$ */

#include "php.h"
#include "pageinfo.h"
#include "SAPI.h"

#include <stdio.h>
#include <stdlib.h>
#if HAVE_PWD_H
#if MSVC5
#include "win32/pwd.h"
#else
#include <pwd.h>
#endif
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/stat.h>
#if MSVC5
#include <process.h>
#endif

#ifndef THREAD_SAFE
static long page_uid   = -1;
static long page_inode = -1;
static long page_mtime = -1;
#endif

static void _php3_statpage(void)
{
#if !APACHE
	char *path;
	struct stat sb;
#else
	request_rec *r;
	SLS_FETCH();
	
	r = ((request_rec *) SG(server_context));
#endif
	
#if APACHE
	/* Apache has already gone through the trouble of doing
	   the stat(), so the only real overhead is copying three
	   values. We can afford it, and it means we don't have to
	   worry about resetting the static variables after every
	   hit. */
	page_uid   = r ->finfo.st_uid;
	page_inode = r->finfo.st_ino;
	page_mtime = r->finfo.st_mtime;
#else
	if (page_uid == -1) {
		SLS_FETCH();

		path = SG(request_info).path_translated;
		if (path != NULL) {
			if (stat(path, &sb) == -1) {
				php_error(E_WARNING, "Unable to find file:  '%s'", path);
				return;
			}
			page_uid   = sb.st_uid;
			page_inode = sb.st_ino;
			page_mtime = sb.st_mtime;
		}
	}
#endif
}

long _php3_getuid(void)
{
	_php3_statpage();
	return (page_uid);
}

/* {{{ proto int getmyuid(void)
   Get PHP script owner's UID */
PHP_FUNCTION(getmyuid)
{
	long uid;
	
	uid = _php3_getuid();
	if (uid < 0) {
		RETURN_FALSE;
	} else {
		RETURN_LONG(uid);
	}
}
/* }}} */

/* {{{ proto int getmypid(void)
   Get current process ID */
PHP_FUNCTION(getmypid)
{
	int pid;
	
	pid = getpid();
	if (pid < 0) {
		RETURN_FALSE;
	} else {
		RETURN_LONG((long) pid);
	}
}
/* }}} */

/* {{{ proto int getmyinode(void)
   Get the inode of the current script being parsed */
PHP_FUNCTION(getmyinode)
{
	_php3_statpage();
	if (page_inode < 0) {
		RETURN_FALSE;
	} else {
		RETURN_LONG(page_inode);
	}
}
/* }}} */

/* {{{ proto int getlastmod(void)
   Get time of last page modification */
PHP_FUNCTION(getlastmod)
{
	_php3_statpage();
	if (page_mtime < 0) {
		RETURN_FALSE;
	} else {
		RETURN_LONG(page_mtime);
	}
}
/* }}} */