kbuild: eradicate bashisms in scripts/patch-kernel
Make the patch-kernel shell script sufficiently compatible with POSIX
shells, i.e., remove bashisms from scripts/patch-kernel.
This means that it now also works on dash 0.5.3-5
and still works on bash 3.1dfsg-8.
Full changelog:
- replaced non-standard "==" by standard "="
- replaced non-standard "source" statement by POSIX "dot" command
- use leading ./ on mktemp filename to force the tempfile to a local
directory, so that the search path is not used
- replace bash syntax to remove leading dot by similar POSIX syntax
- added missing (optional/not required) $ signs to shell variable names
Signed-off-by: Andreas Mohr <andi@lisas.de>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/patch-kernel b/scripts/patch-kernel
index 67e4b18..ece46ef 100755
--- a/scripts/patch-kernel
+++ b/scripts/patch-kernel
@@ -65,7 +65,7 @@
patchdir=${2-.}
stopvers=${3-default}
-if [ "$1" == -h -o "$1" == --help -o ! -r "$sourcedir/Makefile" ]; then
+if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then
cat << USAGE
usage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
source directory defaults to /usr/src/linux,
@@ -182,10 +182,12 @@
}
# set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
-TMPFILE=`mktemp .tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
+# force $TMPFILEs below to be in local directory: a slash character prevents
+# the dot command from using the search path.
+TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
tr -d [:blank:] < $TMPFILE > $TMPFILE.1
-source $TMPFILE.1
+. $TMPFILE.1
rm -f $TMPFILE*
if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
then
@@ -202,11 +204,7 @@
EXTRAVER=
if [ x$EXTRAVERSION != "x" ]
then
- if [ ${EXTRAVERSION:0:1} == "." ]; then
- EXTRAVER=${EXTRAVERSION:1}
- else
- EXTRAVER=$EXTRAVERSION
- fi
+ EXTRAVER=${EXTRAVERSION#.}
EXTRAVER=${EXTRAVER%%[[:punct:]]*}
#echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
fi
@@ -251,16 +249,16 @@
do
CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
EXTRAVER=
- if [ $stopvers == $CURRENTFULLVERSION ]; then
+ if [ $stopvers = $CURRENTFULLVERSION ]; then
echo "Stopping at $CURRENTFULLVERSION base as requested."
break
fi
- SUBLEVEL=$((SUBLEVEL + 1))
+ SUBLEVEL=$(($SUBLEVEL + 1))
FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
#echo "#___ trying $FULLVERSION ___"
- if [ $((SUBLEVEL)) -gt $((STOPSUBLEVEL)) ]; then
+ if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then
echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
exit 1
fi
@@ -297,7 +295,7 @@
if [ x$gotac != x ]; then
# Out great user wants the -ac patches
# They could have done -ac (get latest) or -acxx where xx=version they want
- if [ $gotac == "-ac" ]; then
+ if [ $gotac = "-ac" ]; then
# They want the latest version
HIGHESTPATCH=0
for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
