#43908 [Opn]: exec() swallows whitespace in output

From:	Arne dot Heizmann at csr dot com	Date:	Thu, 24 Jan 2008 15:46:45 +0000
Subject:	#43908 [Opn]: exec() swallows whitespace in output
References:	1	Groups:	php.bugs
Request:	Send a blank email to php-bugs+get-121512@lists.php.net to get a copy of this message

 ID:               43908
 User updated by:  Arne dot Heizmann at csr dot com
 Reported By:      Arne dot Heizmann at csr dot com
 Status:           Open
 Bug Type:         *General Issues
 Operating System: Windows 2000
 PHP Version:      5.2.5
 New Comment:

In your patch it appears that you are still deliberately removing
whitespace. Why?


Previous Comments:
------------------------------------------------------------------------

[2008-01-24 10:35:40] felipe@php.net

My suggestion:

http://ecl.zoone.com.br/etc/patches/bug43908.patch

------------------------------------------------------------------------

[2008-01-24 02:53:33] davidc@php.net

Even easier to reproduce:

<?php var_dump(exec("echo ' '")); ?>

------------------------------------------------------------------------

[2008-01-22 16:51:56] Arne dot Heizmann at csr dot com

Description:
------------
The exec() call is supposed to return the output of the system call
into the second parameter.

However, it modifies this output. It behaves as if rtrim() is called on
each line. This causes data loss because rtrim() is not reversible.

Reproduce code:
---------------
<?
    header ('Content-type: text/plain');
    file_put_contents ('temp', " "); // also reproducible with "\t"
    exec ("type temp", $ops, $result);
    echo var_export ($ops, true);
?>

Expected result:
----------------
array (
  0 => ' ',
)

Actual result:
--------------
array (
  0 => '',
)


------------------------------------------------------------------------


-- 
Edit this bug report at http://bugs.php.net/?id=43908&edit=1


   

Thread (17 messages)

• Arne dot Heizmann at csr dot comTue, 22 Jan 2008 16:51:56 +0000
  • davidc@php.netThu, 24 Jan 2008 02:53:34 +0000#43908 [Opn]: exec() swallows whitespace in output
  • felipe@php.netThu, 24 Jan 2008 10:35:40 +0000#43908 [Opn]: exec() swallows whitespace in output
  • Arne dot Heizmann at csr dot comThu, 24 Jan 2008 15:46:45 +0000#43908 [Opn]: exec() swallows whitespace in output
  • felipe@php.netThu, 24 Jan 2008 20:37:30 +0000#43908 [Opn]: exec() swallows whitespace in output
  • Arne dot Heizmann at csr dot comFri, 25 Jan 2008 17:59:47 +0000#43908 [Opn]: exec() swallows whitespace in output
  • felipe@php.netFri, 25 Jan 2008 18:24:43 +0000#43908 [Opn]: exec() swallows whitespace in output
  • Arne dot Heizmann at csr dot comFri, 25 Jan 2008 18:43:54 +0000#43908 [Opn]: exec() swallows whitespace in output
  • Arne dot Heizmann at csr dot comMon, 02 Jun 2008 13:26:52 +0000#43908 [Opn]: exec() swallows whitespace in output
  • jani@php.netThu, 17 Jul 2008 23:43:22 +0000#43908 [Opn->Bgs]: exec() swallows whitespace in output
  • Arne dot Heizmann at csr dot comFri, 18 Jul 2008 14:28:05 +0000#43908 [Bgs]: exec() swallows whitespace in output
  • jani@php.netFri, 18 Jul 2008 16:02:09 +0000#43908 [Bgs->Opn]: Add an optional parameter to exec() to not trim whitespace from output
  • dwake at box dot comWed, 12 Dec 2012 23:08:09 +0000Req #43908 [Com]: Add an optional parameter to exec() to not trim whitespace from output
  • rasmus@php.netWed, 12 Dec 2012 23:18:52 +0000Req #43908 [Opn->Wfx]: Add an optional parameter to exec() to not trim whitespace from output
  • dwake at box dot comWed, 12 Dec 2012 23:24:38 +0000Req #43908 [Com]: Add an optional parameter to exec() to not trim whitespace from output
  • dwake at box dot comWed, 12 Dec 2012 23:30:48 +0000Req #43908 [Com]: Add an optional parameter to exec() to not trim whitespace from output
  • rasmus@php.netThu, 13 Dec 2012 00:11:42 +0000Req #43908 [Wfx]: Add an optional parameter to exec() to not trim whitespace from output