When I need to suppress some kind of output e.g.
foo | grep -v bar
But foo gives sometimes only:
bar
bar
bar...
grep will return -1. How do I transform the exit code 1 to 0?
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8
You could always try piping it through something else, like cat, to get rid of the exit code from grep - though that may be a bigger hammer than you want.
Goyuix
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and this seems even to be Posix compliant – math Jul 20 '10 at 16:10
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8You can also do `|| true` if you're trying to bypass failure under `set -e` – Daenyth Jul 20 '10 at 16:57
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@Daenyth Of course that transforms _every_ non-zero exit code to 0, not only 1. – MarnixKlooster ReinstateMonica Mar 09 '17 at 09:54
1
At least in bash, you can use
foo || (EC=$?; if [ $EC -ne 1 ]; then exit $EC; fi)
This changes exit code 1 to 0, and changes nothing else.
(Perhaps not POSIX-compliant, but probably a POSIX-compliant version exists.)
MarnixKlooster ReinstateMonica
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