Bug #72864 [Com]: CURLOPT_READFUNCTION waits $fp readable only once.

Edit report at https://bugs.php.net/bug.php?id=72864&edit=1 ID: 72864 Comment by: ryosuke_i_628 at yahoo dot co dot jp Reported by: ryosuke_i_628 at yahoo dot co dot jp Summary: CURLOPT_READFUNCTION waits $fp readable only once. Status: Open Type: Bug Package: cURL related Operating System: OSX 10.11.5 PHP Version: 7.0.9 Block user comment: N Private report: N New Comment: Note that: - cURL actually sends "Content-Length: 5" - Additional printf calls after the first call are completely ignored Previous Comments: ------------------------------------------------------------------------ [2016-08-17 10:14:08] ryosuke_i_628 at yahoo dot co dot jp Description: ------------ CURLOPT_READFUNCTION waits $fp readable only once. Is this a bug? Or by design? Test script: --------------- <?php /* mkfifo /path/to/fifo */ $fp = fopen('/path/to/fifo', 'rb'); $ch = curl_init(); curl_setopt_array($ch, [ CURLOPT_URL => 'example.com', CURLOPT_PUT => true, CURLOPT_INFILE => $fp, CURLOPT_INFILESIZE => 5, CURLOPT_READFUNCTION => function ($ch, $fp, $max) { $buf = fread($fp, 1); var_dump($buf); return $buf; }, ]); curl_exec($ch); /* We can verify that CURLOPT_READFUNCTION invocation is blocked. However, after we executed the following command... printf "a" > /path/to/fifo */ ?> Expected result: ---------------- string(1) "a" ...then invocation should be blocked again Actual result: -------------- string(1) "a" string(0) "" ...wtf!? ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72864&edit=1