How can I check my environment ?

Joydeep Bakshi · 07-22-2011, 06:52 AM

Hello,

I have written a tiny script for kernel compilation, which call menuconfig and then compile the kernel. It is working fine.
Now I like to test my environment and if it is shell menuconfig will be called and if X then xconfig will be called.
How can I check the environment then ?

Thanks

bigearsbilly · 07-22-2011, 08:19 AM

try

Code:

if test -t 0 ;then

Joydeep Bakshi · 07-22-2011, 08:31 AM

Could you please explain a little ? What actually is it testing ?

bigearsbilly · 07-22-2011, 08:48 AM

man test

Code:

     -t file_descriptor
                   True if the file whose file descriptor number is
                   file_descriptor is open and is associated with a terminal.

0 = stdin
1 = stdout
2 = stderr

it works for me, like so:

Code:

#!/bin/sh


do_it()
{
    find $HOME -name \*.core -exec rm {} \; -print
}


if test -t 0
then
    do_it
else
    2>&1 do_it | xmessage -file - -timeout 60
fi

so if I run xterm it prints, if i click the icon I get a pop-up window.
Is that what you meant?

Joydeep Bakshi · 07-22-2011, 08:56 AM

Well my intention is little different.

Quote:

#need a test to check terminal or X
if terminal
then
make menuconfig
else
make xconfig
fi

theNbomr · 07-22-2011, 11:28 AM

Not fool-proof, but if $DISPLAY exists and has sane values, you could probably assume you can run xconfig. Your problem seems to become the more general question of whether there is a ready X server.

--- rod.

Joydeep Bakshi · 07-22-2011, 12:04 PM

Quote:

Originally Posted by theNbomr

Your problem seems to become the more general question of whether there is a ready X server.

But if I run the script from a virtual terminal, then even X running at different terminal; should call menuconfig

MTK358 · 07-22-2011, 12:23 PM

Quote:

Originally Posted by Joydeep Bakshi

But if I run the script from a virtual terminal, then even X running at different terminal; should call menuconfig

$DISPLAY is not set in virtual terminals even if X is running.