bash and groups

jmrbcu · 2008-09-04 22:04:47

A simple question: how to know in a bash script if an user belongs to certain group, let's say: operators?

Garns · 2008-09-04 22:22:22

man bash wrote:

GROUPS An array variable containing the list of groups of which the current user is a member. Assignments to GROUPS have no effect and return an error status. If GROUPS is unset, it loses its special properties, even if it is subsequently reset.

It contains the group numbers, not the names.

jmrbcu · 2008-09-04 22:29:28

actually, what I want is if an user is member of a group, do somethin, else, do something else

pete-the-meat · 2008-09-05 00:03:08

check the /etc/group file? a little long winded but the only way i can think of doing it, and it's probably better done in perl as well

cactus · 2008-09-05 00:44:22

$ groups USERNAME

example

$ groups root
root bin daemon sys adm disk wheel log

so...

$ groups root | grep -qi wheel
$ if [ $? = 0 ]; then echo "root is a member of wheel"; else echo "root is not a member of wheel"; fi
root is a member of wheel

Arch Linux

#1 2008-09-04 22:04:47

bash and groups

#2 2008-09-04 22:22:22

Re: bash and groups

#3 2008-09-04 22:29:28

Re: bash and groups

#4 2008-09-05 00:03:08

Re: bash and groups

#5 2008-09-05 00:44:22

Re: bash and groups

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