Req #39598 [Com]: error verification after fwrite()

Edit report at https://bugs.php.net/bug.php?id=39598&edit=1 ID: 39598 Comment by: gauthierm@php.net Reported by: max at nucleus dot it Summary: error verification after fwrite() Status: Open Type: Feature/Change Request Package: Feature/Change Request Operating System: Linux PHP Version: 5.2.0 Block user comment: N Private report: N New Comment: Here's a simple reproduce test case: http://labs.silverorange.com/files/php-bug39598/php-bug-39598-test.phps In this case, and EPIPE occurs. The fwrite call writes 0 bytes. No error code is available and no PHP error is raised. Previous Comments: ------------------------------------------------------------------------ [2006-11-22 22:53:31] max at nucleus dot it Description: ------------ The documentation states tha fwrite() returns false in case of error, but it doesn't do so if the actual write fails. For example if I asynchronously write to a pipe (such as those obtained by proc_open()) I and the pipe is not ready or is broken, fwrite() returns 0. This could be a correct behaviour it I had a way to determine the error. The problem is that EAGAIN or EPIPE are completely impossible to determine and I can't know if I need to wait or I have to close the stream. A possible solution would be to implement ferror() or errno. Reproduce code: --------------- $Proc = proc_open($Cmd, $Streams, $Pipes, $CWD, $Env); stream_set_blocking($Pipes[0], 0); $Result = fwrite($Pipes[0], "test"); // If $Pipes[0] is not ready to receive data // $Result is 0, but I can't know why. // The real code I'm writing involves // stream_select() and repeated reads and writes // on multiple pipes. Expected result: ---------------- fwrite() should return 0 when the stream is asynchrounous, the C write() returns 0 and errno is EAGAIN. fwrite() should return false in all other cases where the C write() returns 0. Alternatively a way to access ferror() or errno is needed. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=39598&edit=1