rotate script

commands/scripts/Makefile

@@ -34,6 +34,7 @@ usr:	\
 	/usr/bin/mkdep \
 	/usr/bin/mkdist \
 	/usr/bin/setup \
+	/usr/bin/rotate \
 	/usr/bin/floppysetup \
 	/usr/bin/spell \
 	/usr/bin/srccrc \
@@ -105,6 +106,9 @@ clean:
 /usr/bin/floppysetup:	floppysetup.sh
 	install -m 755 -c -o bin $? $@
 
+/usr/bin/rotate:	rotate.sh
+	install -m 755 -c -o bin $? $@
+
 /usr/bin/setup:	setup.sh
 	install -m 755 -c -o bin $? $@
 

commands/scripts/rotate.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+RM="rm -f"
+MV="mv -f"
+
+if [ $# -ne 2 ]
+then	echo "Usage: $0 <log> <keep>"
+	exit 1
+fi
+
+if [ ! -f "$1" ]
+then	echo "$1 doesn't exist or isn't a file."
+	exit 1
+fi
+
+if [ "$2" -le 0 ]
+then	echo "Keep at least 1 copy please."
+	exit 1
+fi
+
+k="$2"
+$RM "$1.$k" || exit 1
+while [ "$k" -ge 2 ]
+do	prev="`expr $k - 1`"
+	$MV $1.$prev.gz $1.$k.gz 2>/dev/null 
+	k=$prev
+done
+gzip -c $1 >$1.1.gz && : >$1