Add a daily script to the periodic framework that reports

changes to the package database, i.e. any packages that
have been added, updated or deleted in the past 24 hours.
The format is intentionally simple and concise.

That information is particularly useful on servers that
are maintained by multiple administrators.  When someone
adds, updates or deletes a package, the others will see
it in the daily periodic output.

This script is disabled by default.

PR:		conf/113913
Submitted by:	olli
Approved by:	des (mentor)
MFC after:	3 weeks

etc/defaults/periodic.conf

@@ -136,6 +136,9 @@ daily_status_named_usedns="YES"				# DNS lookups are ok
 # 480.status-ntpd
 daily_status_ntpd_enable="NO"				# Check NTP status
 
+# 490.status-pkg-changes
+daily_status_pkg_changes_enable="NO"			# Show package changes
+
 # 500.queuerun
 daily_queuerun_enable="YES"				# Run mail queue
 daily_submit_queuerun="YES"				# Also submit queue

etc/periodic/daily/490.status-pkg-changes

@@ -0,0 +1,43 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# If there is a global system configuration file, suck it in.
+#
+if [ -r /etc/defaults/periodic.conf ]; then
+    . /etc/defaults/periodic.conf
+    source_periodic_confs
+fi
+
+case "$daily_status_pkg_changes_enable" in
+    [Yy][Ee][Ss])
+	if [ ! -f /usr/sbin/pkg_info ]; then
+	    echo '$daily_status_pkg_changes_enable is enabled but' \
+		 "/usr/sbin/pkg_info doesn't exist"
+	    rc=2
+	else
+	    bak=/var/backups
+	    rc=0
+
+	    if [ -f $bak/pkg_info.bak ]; then
+	    	mv -f $bak/pkg_info.bak $bak/pkg_info.bak2
+	    fi
+	    /usr/sbin/pkg_info > $bak/pkg_info.bak
+
+	    cmp -sz $bak/pkg_info.bak $bak/pkg_info.bak2
+	    if [ $? -eq 1 ]; then
+		echo ""
+		echo "Changes in installed packages:"
+		diff -U 0 $bak/pkg_info.bak2 $bak/pkg_info.bak \
+		| grep '^[-+][^-+]' | sort -k 1.2
+	    fi
+	fi
+	;;
+
+    *)
+	rc=0
+	;;
+esac
+
+exit $rc