Re: [Help-bash] Test exit status before printing the output without using temp file

[Geir Hauge]

On Sat, Jan 30, 2016 at 08:49:00PM -0600, Peng Yu wrote:
> Hi, Suppose I want to only print the output of a program if the exit
> status is 0.
> 
> So far, I can only find a solution using a temp file. That is, pipe
> the output of the program to a temp file and then test the exist
> status of the program. If the exit status is 0, then I cat the content
> in the temp file.
> 
> Does anybody know if it is possible to have a solution without a temp file?

You can store it in a variable:

    if output=$(cmd); then
        printf 'Success! The output was:\n%s\n' "$output"
    fi

-- 
Geir Hauge