Jeremy Mates wrote:
On 2026-04-16 06:21:17 +0200, Harald Dunkel wrote:
gate5b# x=$(rcctl ls failed) || rcctl restart $x
smtpd(ok)
gate5b# rcctl ls failed
gate5b# echo $?
0
This is confusing. Imagine grep would exit 1 if it has found
something.
grep uses inverse logic (positive match) to `rcctl ls failed` (negative
match) so may not be the best analogy. One may want to do something like
rcctl ls failed || mail ...
to notify from a script but only when there is something to do, that is,
when there is a failed service and therefore a non-zero exit status word
to indicate that.
This is bad code. IMHO
rcctl ls failed && echo 'service is not running'
should work similar to
rcctl ls failed | grep -q smtpd && echo 'smtpd is not running'
but it doesn't. I understand that the exit value of "rcctl ls failed"
is inverted to grep; thats the problem.
Regards
Harri
