[NMLUG] grep help

[jamesh at swcp.com (James)]

My $0.02 I'm guessing you're going to use it in conjunction with another
script?

-----------------
#!/bin/bash

#
# Usage ./igm <user> <group>
#       Prints 'IN' if is member 'NOTIN' if not.
#

# What to print when in
IN="IN"
# What to print when not in
NOTIN="NOTINI"

if [ -z "$1" ] || [ -z "$2" ]; then
        echo "Usage: $0 <username> <group>"
        echo "   Prints 'IN' if <username> is member of <group>"
        echo "   Prints 'NOTIN' if <username> is not a member of <group>"
        echo ""
        exit;
fi

MEMBER=`egrep "^$2[,:]" /etc/group | egrep "[,:]$1([,:]|$)"`

if [ -z "$MEMBER" ]; then
        echo "$NOTIN"
else
        echo "$IN"
fi
-----------------

On Wed, Mar 16, 2005 at 02:39:28PM -0700, Ed Heron wrote:
>  I'm writing a bash script that needs to check if a particular person is in 
> a specific group.
> 
>  I'm using:
> 
> if grep "^${group}:.*[:,]${user}[,$]" /etc/group >/dev/null ; then echo 
> "${user} is a member of ${group}" ; fi
> 
>  Unfortunately, if $user is last in the list it appears to be false.  If I 
> `grep "^${group}:.*[:,]${user}$" /etc/group` it succeeds.
> 
>  I don't use many regexp, am I missing something? 
> 
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> 

-- 

James Hamilton
Southwest Cyberport
http://www.swcp.com
505-232-7992