Re: [PHP] PHP CLI setting cooked terminal mode

On 11 Sep 2013, at 17:37, Alain Williams <[email protected]> wrote:

> Hi,
> 
> I am running a PHP script at the command line and piping the output through less:
> 
>    ./myScript | less
> 
> Since less is an interactive program it puts the terminal into 'raw' mode so
> that it can read characters one at a time. However, when I do the above I find
> that the commands that I type to less are echoed back to me and not acted on
> until I type <RETURN>. This is not as it should be.
> 
> The sript is not doing anything really clever, just looking at a few files and
> printing out directory contents, time stamps, ...
> 
> If I run the script under strace I see:
> 
>    ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
>    ioctl(0, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0
> 
> 
> I can get it to not do this by connect stdout to /dev/null:
> 
>    ./myScript > /dev/null | less
> 
> another way of getting it to work is (and this shows that it really is PHP that
> is messing the tty modes):
> 
>    ./myScript > /dev/null | (sleep 10;less)
> 
> However: PHP should not set the terminal to cooked mode in the first place
> 
> Is there any way in which I can get PHP to not do this ?
> 
> TIA
> 
> I am running PHP 5.3.3 on CentOS 6.

Make sure output buffering is off by putting this at the top of your script:

while(ob_end_clean());

-Stuart

-- 
Stuart Dallas
3ft9 Ltd
http://3ft9.com/