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Bug #44667 proc_open does not handle pipes with the mode 'wb' correctly
Submitted: 2008-04-08 03:21 UTC Modified: 2008-04-08 09:47 UTC
From: mike at silverorange dot com Assigned: jani (profile)
Status: Closed Package: Program Execution
PHP Version: 5.2CVS-2008-04-08 (CVS) OS: *
Private report: No CVE-ID: None
 [2008-04-08 03:21 UTC] mike at silverorange dot com
proc_open.c checks if the mode parameter != "w" instead of checking the first character of the mode parameter. This prevents the mode 'wb' from working properly. 

Reproduce code:

$pipes = array();

$descriptor_spec = array(
    0 => array('pipe', 'rb'),
    1 => array('pipe', 'wb'),

$proc = proc_open('cat', $descriptor_spec, $pipes);

fwrite($pipes[0], 'Hello', 5);

$result = fread($pipes[1], 5);


echo "Result is: ", $result, "\n";


Expected result:
Result is: Hello

Actual result:
on stderr:
cat: write error: Bad file descriptor

on stdout:
Result is:


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 [2008-04-08 08:22 UTC]
Fixed, need to merge around.
 [2008-04-08 09:47 UTC]
This bug has been fixed in CVS.

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