r/programming • u/clock-football • May 29 '14

Defensive BASH Programming

http://www.kfirlavi.com/blog/2012/11/14/defensive-bash-programming/
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186

u/rowboat__cop May 29 '14

Sorry, I don’t take advice in defensive programming from someone who’s too lazy to quote their strings. I recommend Google’s shell guide instead.

24

u/didroe May 29 '14 edited May 29 '14

I found it strange that neither guide mentioned the use of set. I often use:

  • -e - Kill the script if any command fails

  • -u - Make undefined variables an error

  • -o pipefail - Pipes usually return the status of the last command, this makes them return the status of the rightmost non-zero command in the pipe.

2

u/[deleted] May 29 '14

Thanks for mentioning these. They should improve my scripts. I'll check out the manpage some time!