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I'm writing a shell function that will be called from many different places and I want to ignore all errors occurring inside the function disabling the (possibly enabled) set -e shell option, executing set +e.

The problem is that I don't know if that option was set or not, so I don't know if it's really needed to disable it, and more important, if I need to set it again at the end.

So, how do I know if it is set or not? Is there any way to ignore errors of all commands inside a shell function ignoring the -e shell option if is set?

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Look at the value of $-, if it contains an 'e', then the '-e' option is set. This variable contains a list of all set options. This is described in the bash man page.

  • 5
    You can check with something like [[ $- =~ e ]]. – Ansgar Wiechers Sep 10 '12 at 14:28
  • @AnsgarWiechers your way of checking is way better than mine echo $- | grep -q "e" :) – Trevor Boyd Smith Jul 8 '16 at 16:17
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I like both answers. Ansgar's suggestion works well with bash, Trevor's is good if grep is in the PATH. If you want to be independent of shell (bash/sh) and PATH you could use

[ "${-#*e}" != "$-" ]

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