#32858 [NEW]: Bug #25649 has crept back into PHP - Improper feof() handling under FreeBSD

From: lew at mailduct dot com Operating system: FreeBSD 4.11-REL PHP version: 4.3.10 PHP Bug Type: Filesystem function related Bug description: Bug #25649 has crept back into PHP - Improper feof() handling under FreeBSD Description: ------------ In my prior bug report #25649 from September 2003, I pointed out a serious bug in how PHP handles FEOF under FreeBSD. It was fixed by wez@php.net and committed. This same problem (improper handling of feof() by PHP under FreeBSD) has now crept into current 4.3.X versions of PHP... Problem: Once set, the FEOF indicator is not properly cleared when more data is appended to a file that is opened for read by a PHP application. Example: Suppose I want to "tail" a file using PHP. Once I hit the EOF, I will no longer be able to read data from that file even when another application appends to it. This is not the correct behaviour for feof(), as illustrated by the prior fix done by wez@php.net. Reproduce code: --------------- --- program: $fp = fopen( '/var/log/maillog','r' ); while( TRUE ) { $r = array( $fp ); $n = stream_select( $r,$w=NULL,$e=NULL,30 ); if( $n ) { echo fgets( $fp ); } } --- feeder: echo "This is a test..." >> /var/log/maillog Expected result: ---------------- For as long as PROGRAM is running, each time I run FEEDER I expect to see PROGRAM output "This is a test..." but it does not, because once EOF is reached, it is not properly reset upon more data being appended to the file. See pr #25649 for historical info... Actual result: -------------- PROGRAM will read the contents of /var/log/maillog until it reaches EOF, and will not output anything else, even if new data is appeneded to the file. -- Edit bug report at http://bugs.php.net/?id=32858&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=32858&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=32858&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=32858&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=32858&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=32858&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=32858&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=32858&r=needscript Try newer version: http://bugs.php.net/fix.php?id=32858&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=32858&r=support Expected behavior: http://bugs.php.net/fix.php?id=32858&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=32858&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=32858&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=32858&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=32858&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=32858&r=dst IIS Stability: http://bugs.php.net/fix.php?id=32858&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=32858&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=32858&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=32858&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=32858&r=mysqlcfg