Bug #79905 [NEW]: fopen() read-only streams in write mode doesn't fail
From: chokolatrix at gmail dot com
Operating system: WINDOWS
PHP version: 7.4.8
Package: Filesystem function related
Bug Type: Bug
Bug description:fopen() read-only streams in write mode doesn't fail
Description:
------------
PHP's fopen() should fail to:
- open read-only streams in write mode (STDIO in 'w' or other write
modes)
- open write-only streams in read mode (STDOUT, STDERR etc. in 'r' or
other read modes)
This was noticed because of Laravel's logging to stderr failing under
Apache/2.4.29 (Win64) mod_fcgid/2.3.9 and PHP 7.4.8 x64 NTS.
There is possibly a bug with Apache and FastCGI exposing STDERR as
non-writable (normally writes STDERR to the error log), but Laravel
logging code checks fopen() result being a stream before writing to it.
Test script:
---------------
<?php
# c:\my-site\test.php
error_reporting(E_ALL);
ini_set('display_errors','On');
$fp = fopen('php://stdin', 'w');
var_dump($fp);
$fp = fopen('php://stderr', 'r');
var_dump($fp);
if ($fp) {
// this then fails on Apache + FastCGI - might be an Apache + FCGI
bug causing stderr not to be writable
fwrite($fp, "test");
}
Expected result:
----------------
bool(false)
bool(false)
Actual result:
--------------
Notice: fwrite(): write of 4 bytes failed with errno=9 Bad file
descriptor in test.php on line 7
resource(3) of type (stream)
resource(4) of type (stream)
--
Edit bug report at https://bugs.php.net/bug.php?id=79905&edit=1
--
Fix committed: https://bugs.php.net/fix.php?id=79905&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=79905&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=79905&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=79905&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=79905&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=79905&r=support
Expected behavior: https://bugs.php.net/fix.php?id=79905&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=79905&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=79905&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=79905&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=79905&r=phptooold
Daylight Savings: https://bugs.php.net/fix.php?id=79905&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=79905&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=79905&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=79905&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=79905&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=79905&r=mysqlcfg
Thread (4 messages)
- chokolatrix at gmail dot com