#!/bin/bash

# Script to run nss_updatedb <network name service>, intended to be run
# from cron

# If we were called from /etc/cron.hourly, and UPDATENSS=hourly, we run
# nss_updatedb, and similarly for daily,weekly etc

# I we weren't called via /etc/cron.*, we run anyway (one-shot, or
# via other cron timing

# If NSS_SERVICE is configured in /etc/sysconfig/nss_updatedb, we update
# using that service, otherwise we look for a line in /etc/nsswitch.conf
# that looks like this:
# passwd: files <service> [NOTFOUND=return]
# If we don't find one, we exit with an error message (since nss is not
# correctly configured for us anyway

UPDATENSS="hourly"
CONFIG_FILE="/etc/sysconfig/nss_updatedb"

. $CONFIG_FILE

IAM=$0

case $IAM in
	/etc/cron.*)
	CRONTIME=${IAM#/etc/cron.}
	CRONTIME=${CRONTIME//\/*/}
	if [ "$CRONTIME" != "$UPDATENSS" ]
	then exit 0
	fi
	;;
esac

# Find out which service we should update from

if [ -z "$NSS_SERVICE" ]; then
	# workaround for broken drakauth (#49769)
	NSS_SERVICE=`sed -n -e 's/[[:space:]]\+\(files\|compat\|db\|tcb\|tinycdb\)[[:space:]]\+/ /g;s,^[[:space:]]*passwd:[[:space:]]\+\([^[:space:]]\+\)[[:space:]]\+\[NOTFOUND=return\].*,\1,gp' /etc/nsswitch.conf`
	if [ -z "$NSS_SERVICE" ]; then
		echo "No NSS_SERVICE configured in $CONFIG_FILE and /etc/nsswitch.conf does not seem to be configured correctly" >&2
		exit 5
	fi
fi

if [ "$ONLY_LOGGED_USERS" = "yes" ]; then
    for user in `LC_ALL=C lastlog | egrep -v '**Never|From.*Latest|^root' | cut -f 1 -d ' ' | sort -u`; do
	if ! egrep -q "^$user" /etc/passwd; then
		nss_updatedb $NSS_SERVICE passwd "$user" > /dev/null
		OLDIFS="$IFS"
		IFS=","
		# it lists also the primary group
		for group in `getgrouplist $user`; do
		    nss_updatedb $NSS_SERVICE group "$group" > /dev/null
		done
		IFS="$OLDIFS"
	fi
    done
else
    nss_updatedb $NSS_SERVICE > /dev/null
fi