add a sanity check for diff before using it #48184

svn path=/main/branches/2.0/; revision=1998

2 files changed, 11 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index 21141fc12..bedbc095c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,9 @@
     2. /var/cache/edb/world is now /var/lib/portage/world.
     3. /etc/portage/profile/virtuals is _USER_ configs only.
 
+  18 Sep 2005; Mike Frysinger <vapier@gentoo.org> bin/etc-update:
+  Make sure diff works before checking config files #48184.
+
   08 Sep 2005; Brian Harring <ferringb@gentoo.org> bin/ebuild.sh: Fixed 
   unpack so that it actually works now.  ${tarvars} placement was a bit 
   wrong, which is odd considering it shouldn't have changed.
diff --git a/bin/etc-update b/bin/etc-update
index fb09ea9d0..24af6dccc 100755
--- a/bin/etc-update
+++ b/bin/etc-update
@@ -12,11 +12,9 @@
 
 export PORTAGE_CALLER="etc-update"
 
-eval $(python -c 'import portage; print "export PORTAGE_TMPDIR="+portage.settings["PORTAGE_TMPDIR"]; print "export USERLAND="+portage.settings["USERLAND"]')
+eval $(python -c 'import portage; print "export PORTAGE_TMPDIR="+portage.settings["PORTAGE_TMPDIR"];')
 
-if [ "$USERLAND" == "BSD" ] ; then
-	function sed() { gsed "$@"; }
-elif [ "$USERLAND" == "Darwin" ] && [ -x /bin/gsed ]; then
+if type -p gsed >/dev/null ; then
 	function sed() { gsed "$@"; }
 fi
 
@@ -38,6 +36,12 @@ function scan() {
 	count=0
 	input=0
 	
+	# Sanity check to make sure diff exists and works
+	if ! diff -v &>/dev/null ; then
+		echo "ERROR: 'diff' does not seem to work, aborting"
+		exit 1
+	fi
+
 	for path in ${CONFIG_PROTECT}; do if [ -d ${path} ]; then
 		ofile=""
 		for file in `find ${path}/ -iname "._cfg????_*" |