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#!/bin/bash
#
# cnc2mdv /etc/group file merger
#
# What it does:
#
# - Adds three new groups:
# - Check if these groups or its gids already exists;
# - Remove root from the wheel group.
#
destfile=${destfile:-/etc/group}
backupfile=${destfile}.cnc2mdv
# these are the new groups that are introduced by Mandriva
groups=( usb 43 tape 21 nogroup 65534 )
# error codes
group_already_exists_=8
group_already_exists=9
gid_not_unique=4
sort_groups_by_gid()
{
sort -nt: +2 -3 -o $destfile $destfile #wow
return 0
}
add_new_groups()
{
for (( i=0; i < ${#groups[@]}; i += 2)); do
n=$[$i+1]
gid=${groups[$n]}
gname=${groups[$i]}
errors=yes
while [ $errors = "yes" ]; do
groupadd -g $gid $gname
case $? in
0)
# ok, no errors, group really added
errors=no
;;
$group_already_exists | $group_already_exists_ )
# ok, no problem at all
errors=no
;;
$gid_not_unique)
# bleh, increment gid and try again
# hum, but if ... 65534?
gid=$[$gid+1]
;;
*)
echo "unexpected error during groupadd ($?)"
return 1;
;;
esac
done # while errors
done # for
return 0
}
remove_root_from_wheel()
{
sed -i 's/\(wheel:[^:]*:[^:]*:\)root,*\(.*\)/\1\2/' ${destfile}
return 0
}
main()
{
add_new_groups &&
sort_groups_by_gid &&
remove_root_from_wheel
}
main
# vim:ts=4:sw=4:ai
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