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The Unix shell which was the default shell in macOS until 10.15
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"whatis" returns 0 for missing commands
On macOS 10.14, using whatis on a command that is not installed prints 'command': nothing appropriate as is expected. But returns 0 instead of an error code, which I believe is expected behavior. It …
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Modifying `whatis` to return error code for missing commands
Followup to "whatis" returns 0 for missing commands, I am trying to modify /usr/bin/whatis to return a non-zero exit code after an inappropriate command has been entered. My approach to doing this is …