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2

Retrieving status code when using pipelines

rated 0 times [ 2] [ 0] / answers: 1 / hits: 405 / 1 Year ago, thu, december 29, 2022, 9:15:37

I run the following command in a bash script:

cd SomeDir && (sh -c "$CMD_STR") 2>&1 | some_filtering | sed -u -e ....

I.e. I run CMD_STR in SomeDir (actually CMD_STR is 'make' or 'make target'), do some filtering on CMD_STR's output and then replace some symbols by 'sed'.

I need to retrieve CMD_STR's status code in case CMD_STR fails to return it from my script. How can I do it?

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answered 1 Year ago truwom · Accepted Answer

The solution is to set 'pipefail' option before running the command.

http://www.gnu.org/software/bash/manual/bashref.html

If pipefail is enabled, the pipeline's return status is the value of
the last (rightmost) command to exit with a non-zero status, or zero
if all commands exit successfully.

So now my script looks like the following:

set -o pipefail

cd SomeDir && (sh -c "$CMD_STR") 2>&1 | some_filtering | sed -u -e ....

exit $?