On Wednesday 04 Aug 2010 16:03:25 Peng Yu wrote: > I have the following script and output. The man page says "Return a > status of 0 or 1 depending on the evaluation of the conditional > expression expression." Therefore, I thought that the two printf > statements should print 1 and 0 respectively. But both of them print > 0. I'm wondering what [[ should return if it is not used with a if > statement. > > $ cat main.sh > #!/usr/bin/env bash > > printf '%d\n' `[[ 10 -gt 1 ]]` > printf '%d\n' `[[ 1 -gt 10 ]]` > if [[ 10 -gt 1 ]] > then > echo xxx > fi > $ ./main.sh > 0 > 0 > xxx
You're confusing "return value of the command" with "output of the command". -- D.
