On 11 Sep 2013, at 17:37, Alain Williams <a...@phcomp.co.uk> 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/
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