ID: 34972
User updated by: VJTD3 at VJTD3 dot com
Reported By: VJTD3 at VJTD3 dot com
Status: Assigned
Bug Type: Streams related
Operating System: *
-PHP Version: 5CVS-2005-11-09 (snap)
+PHP Version: php6.0-200602191730, php5.1-200603270630,
php4-STABLE-200603270430 (also in *nix equaliviants)
Assigned To: wez
New Comment:
bug #36030 is very similar to my bug, they might be related.
It looks like anything to STDIN (reguardless of access method like
php://stdin and constant('STDIN') and STDIN are all effected.)
When doing anything, be it select, timeout, or anything to "monitor"
the resource where a window is set (ie to timeout the blocking, set
nonblocking, or similar.) the input "stalls" (it's not really a stall,
it's just waiting for the input.) or fails (such as timeout setting
that fails and returns false.)
Tested on:
php4-STABLE-200603270430
php5.1-200603270630
php6.0-200602191730
Also tested as well on their *nix snaps version and all with the same
result. (blocking when they should not be blocking.)
Better code to make debugging easier and includes examples from
suggestions that don't work:
<?php
set_time_limit('0');
# note for php4 or lower STDIN isn't a defined "constant".
if (version_compare(phpversion(), '5.0.0', '<')) {
define('STDIN', fopen('php://stdin', 'r'));
}
echo 'notice how the data loads unblocked reguardless if there is
data.'."\n";
$demo1 = @fsockopen('yahoo.com', 80, $errno, $errstr, 60);
stream_set_blocking($demo1, FALSE);
fwrite($demo1, 'GET /'."\n\n");
for ($i=1;$i<11;$i++) {
$data1 = @fread($demo1, 1500);
$data1 = str_replace("\r\n", "\n", $data1);
$data1 = str_replace("\n\r", "\n", $data1);
$data1 = str_replace("\r", "\n", $data1);
$data1 = str_replace("\n", '', $data1);
echo 'pass: '.$i.' -> data: '.(strlen($data1) ? $data1 :
'empty')."\n";
sleep('1');
}
echo 'notice how the data loads unblocked and clearly there is no data
because this IP is invalid to connect to.'."\n";
$demo2 = @fsockopen('0.0.0.0', 80, $errno, $errstr, 1);
stream_set_blocking($demo2, FALSE);
for ($i=1;$i<11;$i++) {
# this is expected to be a invalid resource.
$data2 = @fread($demo2, 1500);
$data2 = str_replace("\r\n", "\n", $data2);
$data2 = str_replace("\n\r", "\n", $data2);
$data2 = str_replace("\r", "\n", $data2);
$data2 = str_replace("\n", '', $data2);
echo 'pass: '.$i.' -> data: '.(strlen($data2) ? $data2 :
'empty')."\n";
sleep('1');
}
echo 'a person said to use select, this shows select won\'t work. (and
shouldn\'t it\'s not a socket.) It won\'t even allow input during select
calls.'."\n";
for ($i=1;$i<11;$i++) {
unset($read);
$read[] = STDIN;
socket_select($read, $write = null, $except = null, $tv = 0);
print_r($read);
sleep('1');
}
echo 'same code as yahoo and 0.0.0.0 with fread and blocked
reguardless of setting this to nonblocking.'."\n";
stream_set_blocking(STDIN, FALSE);
for ($i=1;$i<11;$i++) {
echo 'Watch me stall till you type enter I\'m blocking you!'."\n";
$data3 = fread(STDIN, 10);
$data3 = str_replace("\r\n", "\n", $data3);
$data3 = str_replace("\n\r", "\n", $data3);
$data3 = str_replace("\r", "\n", $data3);
$data3 = str_replace("\n", '', $data3);
echo 'pass: '.$i.' -> data: '.(strlen($data3) ? $data3 :
'empty')."\n";
sleep('1');
}
?>
anything I can do to help with details/make the bug easier to fix?
Previous Comments:
------------------------------------------------------------------------
[2005-11-09 20:58:26] [EMAIL PROTECTED]
Assigned to the streams maintainer.
------------------------------------------------------------------------
[2005-10-25 04:23:31] VJTD3 at VJTD3 dot com
<?php
# Make life easier to test bothe versions
# option:
# 1: Yahoo HTTP example
# 2: STDIN example.
$test = 1;
# note for php4 or lower:
# STDIN isn't a defined "constant" so uncomment this.
#define('STDIN', fopen('php://stdin', 'r'));
# ment to paste fread was playing with other methods and
# just pasted the wrong version. The result is the same.
# notice how after the data is done it's still going and
# not blocked.
if($test == '1') {
$demo = fsockopen('yahoo.com', 80);
stream_set_blocking($demo, FALSE);
fwrite($demo, 'GET /'."\n\n");
while (1) {
$data = fread($demo, 1500);
echo (strlen($data) ? 'read:'.$data : "\nread:".'empty'."\n");
sleep(1);
}
}
# same code with fread and blocked reguardless of setting
# to nonblocked.
if($test == '2') {
echo 'Watch me stall till you type enter I\'m blocking you!'."\n";
stream_set_blocking(STDIN, FALSE);
while (1) {
$data = fread(STDIN, 10);
# I do know I could use trim, but if blocking was
# working it will act weird if it's mid of a end of
# line.
$data = str_replace("\n", '', $data);
$data = str_replace("\r", '', $data);
echo (strlen($data) ? 'read:'.$data : "\nread:".'empty'."\n");
sleep(1);
}
}
# stream_select() can't be used, when i try the file
# descriptor just gets locks and all future selects won't
# work. and there is no reason to even select i know what
# resource to monitor i just need blocking to stop so i
# can monitor and process as i need just liek in the
# yahoo http example.
?>
------------------------------------------------------------------------
[2005-10-25 01:26:58] [EMAIL PROTECTED]
FYI, using fgets() with a non-blocking resource makes no sense.
To implement what you're after, use stream_select() and fread(); these
work on stdin just fine.
------------------------------------------------------------------------
[2005-10-24 23:07:00] VJTD3 at VJTD3 dot com
Description:
------------
STDIN won't allow nonblocking.
Reproduce code:
---------------
<?php
stream_set_blocking(STDIN, FALSE);
while (1) {
echo 'infinate loop showing nonblocking problem'."\n";
echo 'said:'.fgets(STDIN, 1024);
}
?>
Expected result:
----------------
The test code should be a infinate loop with "infinate loop showing
nonblocking problem" said trillions of times fast like a infinate loop
is suposto do when you make a boo boo. instead it will say it once then
wait for input then wait again etc as a blocked resource is expected.
but "stream_set_blocking(STDIN, FALSE);" should be allowing it to do
the loop unblocked resulting in major screen flooding yet unblocking
the resource is ignored.
This means you can't do something like a client program in your shell
that is "interactive" like a Telnet client or similar.
I can dig the whole not reading as typing because that would be too
"raw" for common usage... [ie phrasing the backspaces etc though maybe
a seperate abaility? this would allow arrow key kinda stuff and
similar...] But waiting for a "\n" or whatever file ending shouldn't
have any effect on that loop. It should act just like a TCP or any
other connection when unblocked there the resource just has a return of
no data.
"php -f test.php" I use to run it.
Actual result:
--------------
uses blocking when "stream_set_blocking(STDIN, FALSE);" was used.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=34972&edit=1
