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Bug #71796 exec cant work when the cmd is too long
Submitted: 2016-03-11 11:35 UTC Modified: 2016-03-17 06:36 UTC
From: hehu2012 at gmail dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 7.0.4 OS: Centos6.7 x86
Private report: No CVE-ID: None
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 [2016-03-11 11:35 UTC] hehu2012 at gmail dot com 
Description:
------------
 I use

    exec("`fmpeg -i /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.mp4 -y -f mjpeg -ss 3 -t 0.001 -s 640x1136 /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.jpg")

in php file, it doesn't work. But I use `exec("whoami")`, it work well. When I use

    fmpeg -i /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.mp4 -y -f mjpeg -ss 3 -t 0.001 -s 640x1136 /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.jpg

in command line it work well. But when I use

    exec("`fmpeg -i /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.mp4 -y -f mjpeg -ss 3 -t 0.001 -s 640x1136 /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.jpg")

in php it doesn't work.

Test script:
---------------
exec("fmpeg -i /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.mp4 -y -f mjpeg -ss 3 -t 0.001 -s 640x1136 /var/www/ad-1/www/uploads/ad/v/5e/8f/98/88/5e8f98881c4da88fb31a1fe1b93c45d6.jpg")

Expected result:
----------------
exec can work well when the cmd is long?

Actual result:
--------------
It return code 127

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 [2016-03-11 12:11 UTC] g dot sokol99 at g-sokol dot info 
Do you use "ffmpeg" instead of "`fmpeg"?
 [2016-03-11 18:37 UTC] stas@php.net
-Status: Open +Status: Feedback -Package: PHP Language Specification +Package: *General Issues
 [2016-03-17 06:06 UTC] hehu2012 at gmail dot com
-Status: Feedback +Status: Open
 [2016-03-17 06:06 UTC] hehu2012 at gmail dot com 
Thank you！I have resolved this question. It isnot a bug.I didnt add ffmpeg env
 [2016-03-17 06:19 UTC] g dot sokol99 at g-sokol dot info 
Should it be closed?
 [2016-03-17 06:36 UTC] yohgaki@php.net
-Status: Open +Status: Not a bug
 [2016-03-17 06:36 UTC] yohgaki@php.net 
This was not a bug.
 
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