how to display exit status?

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how to display exit status?

Postby ilias » 2005-09-01 16:14

i am running a command. Namely
ilias#acpi_available

the manual page of the command says that if the exit status is 0(true) the acpi subsystem is available.
if the exit status is 1 (false) the acpi subsystem is not available.

I know there is a command - or an environment variable - but I can't remember which one.

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Postby dawgie » 2005-09-02 00:05

The exit status is many times used as a condition to start (or not start) another command.

$command1 && command2
If command1 exits with no error, then command2 starts. So you could do this:
ilias#acpi_available && echo 'success'
There is also the bash characters to display the exit status
$?
So after you
ilias#acpi_available
Then check the exit status:
ilias#echo $?

Information in the Debian Reference Manual 13.2.3
http://www.debian.org/doc/manuals/refer ... am.en.html
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Postby ilias » 2005-09-02 08:42

That's cool
Thanks dawgie
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