checking for return status between multiple commands

vickylife · 11-19-2008, 12:15 PM

i have to run set of commands

command1
command2
command3
command4

Now Whenever any of these command fails i should quit while capturing error message.
Is there a better way then checking for $? after each command.

colucix · 11-19-2008, 12:29 PM

Maybe something like this?

Code:

command1 2> error.log || exit
command2 2> error.log || exit
command3 2> error.log || exit
command4 2> error.log || exit

jailbait · 11-19-2008, 12:30 PM

If you want to delay your error checking until after all of the commands have been executed then you will have to save $? in separate variables after each command.

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Steve Stites

Disillusionist · 11-19-2008, 12:33 PM

If you want to check each command for error codes, then no I would think you would need to check the value of $? for each command.

If you want the fourth command to run only if the previous three ran succesfully you could try:

command1&&command2&&command3&&command4

command2 would only run if command1 was successful.
command3 would only run if command2 was successful.
command4 would only run if command3 was successful.

if $? is 0 then all commands were successful, otherwise one failed but you have no way (that I know of) to determine which command failed.