patch-kernel revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 
1#! /bin/sh
2# Script to apply kernel patches.
3#   usage: patch-kernel [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
4#     The source directory defaults to /usr/src/linux, and the patch
5#     directory defaults to the current directory.
6# e.g.
7#   scripts/patch-kernel . ..
8#      Update the kernel tree in the current directory using patches in the
9#      directory above to the latest Linus kernel
10#   scripts/patch-kernel . .. -ac
11#      Get the latest Linux kernel and patch it with the latest ac patch
12#   scripts/patch-kernel . .. 2.4.9
13#      Gets standard kernel 2.4.9
14#   scripts/patch-kernel . .. 2.4.9 -ac
15#      Gets 2.4.9 with latest ac patches
16#   scripts/patch-kernel . .. 2.4.9 -ac11
17#      Gets 2.4.9 with ac patch ac11
18#   Note: It uses the patches relative to the Linus kernels, not the
19#   ac to ac relative patches
20#
21# It determines the current kernel version from the top-level Makefile.
22# It then looks for patches for the next sublevel in the patch directory.
23# This is applied using "patch -p1 -s" from within the kernel directory.
24# A check is then made for "*.rej" files to see if the patch was
25# successful.  If it is, then all of the "*.orig" files are removed.
26#
27#       Nick Holloway <Nick.Holloway@alfie.demon.co.uk>, 2nd January 1995.
28#
29# Added support for handling multiple types of compression. What includes
30# gzip, bzip, bzip2, zip, compress, and plaintext. 
31#
32#       Adam Sulmicki <adam@cfar.umd.edu>, 1st January 1997.
33#
34# Added ability to stop at a given version number
35# Put the full version number (i.e. 2.3.31) as the last parameter
36#       Dave Gilbert <linux@treblig.org>, 11th December 1999.
37
38# Fixed previous patch so that if we are already at the correct version
39# not to patch up.
40#
41# Added -ac option, use -ac or -ac9 (say) to stop at a particular version
42#       Dave Gilbert <linux@treblig.org>, 29th September 2001.
43#
44# Add support for (use of) EXTRAVERSION (to support 2.6.8.x, e.g.);
45# update usage message;
46# fix some whitespace damage;
47# be smarter about stopping when current version is larger than requested;
48#	Randy Dunlap <rddunlap@osdl.org>, 2004-AUG-18.
49
50# Set directories from arguments, or use defaults.
51sourcedir=${1-/usr/src/linux}
52patchdir=${2-.}
53stopvers=${3-default}
54
55if [ "$1" == -h -o "$1" == --help -o ! -r "$sourcedir/Makefile" ]; then
56cat << USAGE
57usage: patch-kernel [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
58  source directory defaults to /usr/src/linux,
59  patch directory defaults to the current directory,
60  stopversion defaults to <all in patchdir>.
61USAGE
62exit 1
63fi
64
65# See if we have any -ac options
66for PARM in $*
67do
68  case $PARM in
69	  -ac*)
70		  gotac=$PARM;
71
72	esac;
73done
74
75# ---------------------------------------------------------------------------
76# Find a file, first parameter is basename of file
77# it tries many compression mechanisms and sets variables to say how to get it
78findFile () {
79  filebase=$1;
80
81  if [ -r ${filebase}.gz ]; then
82		ext=".gz"
83		name="gzip"
84		uncomp="gunzip -dc"
85  elif [ -r ${filebase}.bz  ]; then
86		ext=".bz"
87		name="bzip"
88		uncomp="bunzip -dc"
89  elif [ -r ${filebase}.bz2 ]; then
90		ext=".bz2"
91		name="bzip2"
92		uncomp="bunzip2 -dc"
93  elif [ -r ${filebase}.zip ]; then
94		ext=".zip"
95		name="zip"
96		uncomp="unzip -d"
97  elif [ -r ${filebase}.Z ]; then
98		ext=".Z"
99		name="uncompress"
100		uncomp="uncompress -c"
101  elif [ -r ${filebase} ]; then
102		ext=""
103		name="plaintext"
104		uncomp="cat"
105  else
106	return 1;
107  fi
108
109  return 0;
110}
111
112# ---------------------------------------------------------------------------
113# Apply a patch and check it goes in cleanly
114# First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
115
116applyPatch () {
117  echo -n "Applying $1 (${name})... "
118  if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
119  then
120    echo "done."
121  else
122    echo "failed.  Clean up yourself."
123    return 1;
124  fi
125  if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
126  then
127    echo "Aborting.  Reject files found."
128    return 1;
129  fi
130  # Remove backup files
131  find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
132 
133  return 0;
134}
135
136# set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
137TMPFILE=`mktemp .tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
138grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
139tr -d [:blank:] < $TMPFILE > $TMPFILE.1
140source $TMPFILE.1
141rm -f $TMPFILE*
142if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
143then
144    echo "unable to determine current kernel version" >&2
145    exit 1
146fi
147
148NAME=`grep ^NAME $sourcedir/Makefile`
149NAME=${NAME##*=}
150
151echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
152
153# strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
154EXTRAVER=
155if [ x$EXTRAVERSION != "x" ]
156then
157	if [ ${EXTRAVERSION:0:1} == "." ]; then
158		EXTRAVER=${EXTRAVERSION:1}
159	else
160		EXTRAVER=$EXTRAVERSION
161	fi
162	EXTRAVER=${EXTRAVER%%[[:punct:]]*}
163	#echo "patch-kernel: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
164fi
165
166#echo "stopvers=$stopvers"
167if [ $stopvers != "default" ]; then
168	STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
169	STOPEXTRA=`echo $stopvers | cut -d. -f4`
170	#echo "STOPSUBLEVEL=$STOPSUBLEVEL, STOPEXTRA=$STOPEXTRA"
171else
172	STOPSUBLEVEL=9999
173	STOPEXTRA=9999
174fi
175
176while :				# incrementing SUBLEVEL (s in v.p.s)
177do
178    if [ x$EXTRAVER != "x" ]; then
179	CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
180    else
181	CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
182    fi
183
184    if [ $stopvers == $CURRENTFULLVERSION ]; then
185        echo "Stopping at $CURRENTFULLVERSION base as requested."
186        break
187    fi
188
189    while :			# incrementing EXTRAVER (x in v.p.s.x)
190    do
191	EXTRAVER=$((EXTRAVER + 1))
192	FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
193	#echo "... trying $FULLVERSION ..."
194
195	patch=patch-$FULLVERSION
196
197	# See if the file exists and find extension
198	findFile $patchdir/${patch} || break
199
200	# Apply the patch and check all is OK
201	applyPatch $patch || break
202
203	continue 2
204    done
205
206    EXTRAVER=
207    SUBLEVEL=$((SUBLEVEL + 1))
208    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
209    #echo "___ trying $FULLVERSION ___"
210
211    if [ $((SUBLEVEL)) -gt $((STOPSUBLEVEL)) ]; then
212	echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
213	exit 1
214    fi
215
216    patch=patch-$FULLVERSION
217
218    # See if the file exists and find extension
219    findFile $patchdir/${patch} || break
220
221    # Apply the patch and check all is OK
222    applyPatch $patch || break
223done
224#echo "base all done"
225
226if [ x$gotac != x ]; then
227  # Out great user wants the -ac patches
228	# They could have done -ac (get latest) or -acxx where xx=version they want
229	if [ $gotac == "-ac" ]; then
230	  # They want the latest version
231		HIGHESTPATCH=0
232		for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
233		do
234			ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
235			# Check it is actually a recognised patch type
236			findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
237
238		  if [ $ACVALUE -gt $HIGHESTPATCH ]; then
239			  HIGHESTPATCH=$ACVALUE
240		  fi
241		done
242
243		if [ $HIGHESTPATCH -ne 0 ]; then
244			findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
245			applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
246		else
247		  echo "No -ac patches found"
248		fi
249	else
250	  # They want an exact version
251		findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
252		  echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION.  Hohum."
253			exit 1
254		}
255		applyPatch patch-${CURRENTFULLVERSION}${gotac}
256	fi
257fi
258