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--- etc/freebsd/getty-ttyv4/whichtty 1970-01-01 01:00:00.000000000 +0100
+++ etc/freebsd/getty-ttyv4/whichtty 2016-08-10 22:34:36.558752671 +0100
@@ -0,0 +1,5 @@
+realpath=`realpath $0`
+dirname=`dirname $realpath`
+dirname=`basename $dirname`
+tty=`expr $dirname : 'getty-\(ttyv[0-9]\)'`
+[ -z "${tty%0}" ] && echo "Name of directory must be getty-ttyvx, where x is 0-9" && exit 1
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