#46422 [Opn->Bgs]: php cli's interactive mode BLOCKs while using a fifo

ID: 46422 Updated by: jani@php.net Reported By: i at iii dot dontexist dot net -Status: Open +Status: Bogus Bug Type: CGI related Operating System: Centos 5 PHP Version: 5.2.6 New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Previous Comments: ------------------------------------------------------------------------ [2008-10-29 17:14:25] i at iii dot dontexist dot net Description: ------------ Hello, I would like to use "php -a" (php cli interactive mode) and input via a fifo. it seems that while using it with a Character Device / Terminal. it will behave accordingly. but while piping its stdin .. it won't interact - it will block its stdout. due to the fact it is an interactive mode, I can only assume its a misbehavior, I wouldn't expect interactive mode to block. Reproduce code: --------------- 1. mkfifo fifo 2. cat fifo | strace php -a 3. cat > fifo <?php echo "Hello World"; ?> 4. strace will reveal it been read, but nothing will be written back unless about 8K buffer stack is full, or EOF. Expected result: ---------------- I expect "interactive mode" not to block while piping its STDIN. (without a Character Device / Terminal) Actual result: -------------- It would block unless EOF reached OR about 8K buffer is filled up. and only then, it will write back to stdout. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=46422&edit=1