main/logrotate: add support for cpulimit

If package cpulimit is installed, then apply the cpulimit specified
in CPULIMIT in /etc/conf.d/logrotate

This helps monitoring software to not trigger high CPU load alarms
when rotating logs.

main/logrotate/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=logrotate
 pkgver=3.8.2
-pkgrel=0
+pkgrel=1
 pkgdesc="Tool to rotate logfiles"
 url="https://fedorahosted.org/logrotate/"
 arch="all"
@@ -14,7 +14,9 @@ source="https://fedorahosted.org/releases/l/o/logrotate/logrotate-$pkgver.tar.gz
 	logrotate-3.7.9-atomic-create.patch
 	logrotate-3.7.9-shred.patch
 	logrotate-3.7.9-statefile.patch
-	logrotate.conf"
+	logrotate.cron
+	logrotate.conf
+	logrotate.confd"
 
 build() {
 	cd "$srcdir/$pkgname-$pkgver"
@@ -27,11 +29,16 @@ package() {
 	install -Dm755 logrotate "$pkgdir"/usr/sbin/logrotate
 	install -Dm644 logrotate.8 "$pkgdir"/usr/share/man/man8/logrotate.8
 	install -Dm644 ../logrotate.conf "$pkgdir"/etc/logrotate.conf
-	install -Dm755 examples/logrotate.cron "$pkgdir"/etc/periodic/daily/logrotate
+	install -Dm755 "$srcdir"/logrotate.cron \
+		"$pkgdir"/etc/periodic/daily/logrotate || return 1
+	install -Dm644 "$srcdir"/logrotate.confd  \
+		"$pkgdir"/etc/conf.d/logrotate
 }
 
 md5sums="ddd4dcf28c38b3ac6bc6ff4e0148308a  logrotate-3.8.2.tar.gz
 0273f868dc4208eed0a442759d86e77c  logrotate-3.7.9-atomic-create.patch
 74216579397b03c44d1d85dd233306d8  logrotate-3.7.9-shred.patch
 82ebd23da8a7f0650a4c80577dbdc739  logrotate-3.7.9-statefile.patch
-fef6415a79a6fede8cf9b9b6b8410090  logrotate.conf"
+7e9fad2c9b382a2370c11ef0c89f61c7  logrotate.cron
+fef6415a79a6fede8cf9b9b6b8410090  logrotate.conf
+e7e4b67d5c4bda49ff3c041834180c1e  logrotate.confd"

main/logrotate/logrotate.confd

+# Limit cpu usage so monitoring software does not trigger CPU alarms
+# This will only be used if package "cpulimit" is installed
+CPULIMIT=50
+

main/logrotate/logrotate.cron

+#!/bin/sh
+
+if [ -f /etc/conf.d/logrotate ]; then
+	. /etc/conf.d/logrotate
+fi
+
+if [ -x /usr/bin/cpulimit ] && [ -n "$CPULIMIT" ]; then
+	_cpulimit="/usr/bin/cpulimit --limit=$CPULIMIT"
+fi
+
+$_cpulimit /usr/sbin/logrotate /etc/logrotate.conf
+EXITVALUE=$?
+if [ $EXITVALUE != 0 ]; then
+    /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
+fi
+exit 0