Is there a reason why the newgrp builtin and /usr/bin/newgrp behave
differently on Solaris? /usr/bin/newgrp and newgrp both switch to the
specified group to execute commands, but if something goes wrong, like
specifying newgrp --help, the builtin newgrp will terminate the
calling shell (in case of a login shell this means you're being logged
out) while /usr/bin/newgrp leaves the calling shell running.

Irek
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