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by 1amzave
3740 days ago
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Fails to mention what is in my opinion the most devious, subtle potential pitfall with `set -e`: assigning (or even just a bare evaluation of) an arithmetic zero. `foo=0` won't do anything surprising, but `let foo=0` will return 1, and thus abort your script if you're not careful. Also, as an alternative to the proposed `set +e; ...; set -e` wrapper for retrieving the exit status of something expected to exit non-zero (generally cleaner in my opinion, if slightly "clever"): retval=0
count=$(grep -c some-string some-file) || retval=$?
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