check-group-share-access

#!/bin/sh

CUAD="/root/bin/can-user-access-dir"    # Can this 'user' access this 'directory'

[ -z "$1" ] && echo "Usage: $0" && exit
USER=$1

### Prepare working space ###

T=`mktemp -d --tmpdir=/tmp .XXXXX`
trap "rm -rf $T" EXIT

## trap "rm -rvf $T" EXIT
## echo "Workdir: $T"

chmod 777 $T
cd $T || { echo "Can't change working directory"; exit; }

### Now start working ###

id $USER        |\
 cut -f4 -d=        |\
 sed -e 's/,/\n/g'  |\
 grep -v ^513       |\
 sed -e 's/[()]/ /g'    |\
while read gid name; do
    [ -z "$gid" -o -z "$name" ] && continue
    mkdir -m 750 $name
    chgrp $gid $name
    $CUAD $USER $name
done