Add a small shell script to be used by syspatch to diff the fake root

directories for changes due to the fact that we have to do some "magic"
to figure out if things have really changed.

diff --git a/distrib/syspatch/diff.sh b/distrib/syspatch/diff.sh
new file mode 100755 (executable)
index 0000000..1203b6f
--- /dev/null
+++ b/distrib/syspatch/diff.sh
@@ -0,0 +1,49 @@
+#!/bin/ksh
+#
+# $OpenBSD: diff.sh,v 1.1 2017/04/22 13:41:02 robert Exp $
+#
+# Copyright (c) 2017 Robert Nagy <robert@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+umask 0022
+
+trap exit HUP INT TERM
+
+diff -arq $1 $2 2>&1 | grep differ | \
+while IFS= read -r _d 
+do
+       _o=$(echo $_d | cut -d ' ' -f2)
+       _n=$(echo $_d | cut -d ' ' -f4)
+       case "${_o##*.}"
+       in
+               a)
+                       cmp -s ${_o} ${_n} 34 34 || echo ${_n}
+                       ;;
+               1|3p)
+                       _onm=$(mktemp)
+                       _nnm=$(mktemp)
+                       trap 'rm -f ${_onm} ${_nnm}' EXIT
+                       sed -E '/([0-9]+-[0-9]+-[0-9]+|=+)/d' ${_o} > ${_onm}
+                       sed -E '/([0-9]+-[0-9]+-[0-9]+|=+)/d' ${_n} > ${_nnm}
+                       diff -q ${_onm} ${_nnm} >/dev/null || echo ${_n}
+                       rm -f ${_onm} ${_nnm}
+                       ;;
+               EFI|dat|db|tgz|*void|*dir|mk|cache-4)
+                       ;;
+               *)
+                       echo ${_n}
+                       ;;
+       esac
+       rm -f ${_onm} ${_nnm}
+done