Script question

[Glory2G0D]

In going through some scripts on one of our servers, I found the following:

if [ $? == 0]
then
echo "$i, $ADDR" >> ipaddr.ep
fi

What does the [$? == 0] mean?

Thanks,
Glory2G0d

 

[PHV]

What does the [ $? == 0 ] mean?
Is the exit code of the last command equal zero ?
Feel free to take a look at your shell man page.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[LKBrwnDBA]

If the result (exit code) of the last command ($?) is equal (==) to zero (0) then ....


----------------------------------------------------------------------------
The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

 

[Glory2G0D]

Sorry for my not understanding. The following is the whole script:

#!/bin/sh

if test -r ipaddr.ep
then
rm ipaddr.ep
fi

for i in `wlookup -ar Endpoint -L`
do
echo "Getting the address of $i"
ADDR=`wep $i get address`

if [ $? == 0]
then
echo "$i, $ADDR" >> ipaddr.ep
fi
done

Is the exit code for the last command the ADDR line? Thanks again.

Glory2G0D

 

[PHV]

Seems that $? refers to the exit code of the wep command.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[Glory2G0D]

I needed a reminder on what exit codes were. Thanks for your help, this is now resolved for me.

Glory2G0D