PHP CLI setting cooked terminal mode

[Alain Williams]

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.
--
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer.
[phone] http://www.phcomp.co.uk/
Parliament Hill Computers Ltd. Registration Information: http://www.phcomp.co.uk/contact.php
#include <std_disclaimer.h>

[Stuart Dallas]

Post by Alain Williams
Hi,
./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, ...
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
./myScript > /dev/null | less
another way of getting it to work is (and this shows that it really is PHP that
./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

[Alain Williams]

Post by Stuart Dallas
while(ob_end_clean());

Sorry, that does not fix the problem - but thanks for trying.
--
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer.
[phone] http://www.phcomp.co.uk/
Parliament Hill Computers Ltd. Registration Information: http://www.phcomp.co.uk/contact.php
#include <std_disclaimer.h>