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 clever, just generating 100 lines:
for($i = 0; $i < 100; $i++)
echo "i=$i\n";
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
What is happening is that PHP is putting the terminal into cooked mode.
I can get it to not do this by connecting stdin 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.
I posted this to php-gene...@lists.php.net a few days ago, but did not get a
sensible reply.
--
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT
Lecturer.
+44 (0) 787 668 0256 http://www.phcomp.co.uk/
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