display a smiling smiley if the command succeeded and a sad smiley if the command failed

<commmand>; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)
Sample Output
ls; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi
linux  linux-2.6.34-gentoo-r1  linux-2.6.34-gentoo-r5  linux-2.6.35-gentoo-r1  linux-2.6.35-gentoo-r2  snort_dynamicsrc
:)

rm; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi
rm: missing operand
Try `rm --help' for more information.
:(

3
2010-08-23 20:35:31

What Others Think

No need for $? in this case. Just say if ; then echo ':)'; else echo ':('; fi Or more simply: && echo ':)' || echo ':(' e.g. ls && echo ':)' || echo ':('
splante · 387 weeks and 6 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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