Bug #67370 [Com]: Fseek does not return error (-1) on read out of file

Edit report at https://bugs.php.net/bug.php?id=67370&edit=1 ID: 67370 Comment by: roman4e at gmail dot com Reported by: roman4e at gmail dot com Summary: Fseek does not return error (-1) on read out of file Status: Not a bug Type: Bug Package: Filesystem function related Operating System: linux mint 15 PHP Version: 5.5.13 Block user comment: N Private report: N New Comment: Thank you much! Previous Comments: ------------------------------------------------------------------------ [2014-06-02 09:11:02] mike@php.net Because fseek clears the EOF condition, reverse your conditions. ------------------------------------------------------------------------ [2014-06-02 08:58:27] roman4e at gmail dot com change code: while ( !fseek($f,$page,SEEK_SET) && !feof($f)) So why in that case !feof($f) does not return true when go out end of file? ------------------------------------------------------------------------ [2014-06-02 08:23:12] mike@php.net One can set the file pointer beyond EOF, this is not a bug. ------------------------------------------------------------------------ [2014-06-02 07:47:01] roman4e at gmail dot com Description: ------------ php v.5.5.5 (cli) (built: Mar 17 2014 12:31:03) (DEBUG) fseek() does not return error (-1) on read out of file, returns 0 Test script: --------------- $f = fopen("file","r"); // file must be several KBytes size $page = 0; while ( !fseek($f,$page,SEEK_SET) ) { $page += 1024; $str = fread($f,1024); if ( $str === false ) die("error reading block"); } echo "ok" Expected result: ---------------- fseek should return -1; Actual result: -------------- file size of 76800 result of reading out of file. last parametr is type of data returned by fread Pageoff = 75776 fseek=0 ftell=75776 read=1024 string Pageoff = 76800 fseek=0 ftell=76800 read=0 string Pageoff = 77824 fseek=0 ftell=77824 read=0 string ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=67370&edit=1