linux/kinstall.sh

   1 #!/bin/sh
   2 #
   3 #  kinstall.sh -- install updated kernel PPP driver in Linux kernel source
   4 #     Michael Callahan callahan@maths.ox.ac.uk 17 May 1995
   5 #
   6 #  This script is complicated because we want to avoid installing a driver
   7 #  in a kernel if it won't work in that kernel.  This means two things:
   8 #    1) we check the version of the kernel and refuse to install if the
   9 #       kernel is too old;
  10 #    2) we check that the files already in the kernel aren't more recent
  11 #       than the one we're about to install.
  12 #  If either 1) or 2) occurs then we exit with an error message and don't
  13 #  touch anything.
  14 #
  15 #  In addition, we have to edit the Makefile in the drivers/net
  16 #  directory to add support for the ppp-comp compression option.
  17
  18 LINUXSRC=/usr/src/linux
  19
  20 if [ $# -gt 1 ]; then
  21    echo usage: $0 [linux-source-directory]
  22    exit 1
  23 fi
  24
  25 if [ $# -eq 1 ]; then
  26    LINUXSRC=$1
  27 fi
  28
  29 #
  30 #  Make sure we can find the kernel source
  31
  32 LINUXMK=$LINUXSRC/Makefile
  33
  34 if [ ! -r $LINUXMK -o ! -d $LINUXSRC/drivers ]; then
  35   echo There appears to be no kernel source distribution in $LINUXSRC.
  36   echo Give the top-level kernel source directory as the argument to
  37   echo this script.
  38   echo usage: $0 [linux-source-directory]
  39   exit 1
  40 fi
  41
  42 #
  43 #  Check that the kernel source Makefile includes the
  44 #    VERSION, PATCHLEVEL, SUBLEVEL version-numbering scheme
  45 #    introduced in 1.0.1
  46 if [ `egrep '^VERSION|^PATCHLEVEL|^SUBLEVEL' $LINUXMK | wc -l` -ne 3 ]; then
  47   echo You appear to have a very old kernel. You must upgrade.
  48   echo It is recommended that you upgrade to the most recent 2.0.x kernel.
  49   exit 1
  50 fi
  51
  52 #
  53 #  Set the VERSION, PATCHLEVEL, SUBLEVEL variables
  54 VERSION=`egrep '^VERSION' $LINUXMK | sed 's/[^0-9]//g'`
  55 PATCHLEVEL=`egrep '^PATCHLEVEL' $LINUXMK | sed 's/[^0-9]//g'`
  56 SUBLEVEL=`egrep '^SUBLEVEL' $LINUXMK | sed 's/[^0-9]//g'`
  57
  58 KERNEL=$VERSION.$PATCHLEVEL.$SUBLEVEL
  59
  60 #
  61 #  Pass judgement on the kernel version
  62 if [ $VERSION -lt 2 ]; then
  63     echo You appear to be running $KERNEL. There is no support for
  64     echo kernels predating 2.0.0.  It is recommended that you upgrade
  65     echo to the most recent 2.0.x kernel.
  66     exit 1
  67 fi
  68
  69 #
  70 # convenience function to exit if the last command failed
  71
  72 bombiffailed () {
  73   STATUS=$?
  74   if [ $STATUS -ne 0 ]; then
  75     echo "=== kinstall.sh exiting with failure status $STATUS"
  76     exit $STATUS
  77   fi
  78 }
  79
  80 #
  81 # convenience function to compare two files marked with ==FILEVERSION
  82 # version numbers; returns success if $1 is not older than $2
  83
  84 newer () {
  85   file1=$1
  86   file2=$2
  87   pat='==FILEVERSION[ \t]+[0-9]+[ \t]*=='
  88
  89   # Find the revision in the kernel
  90   f1rev=""
  91   if [ -r $file1 ]; then
  92     f1rev=`egrep "$pat" $file1 | head -1 | sed 's/[^0-9]//g'`
  93   fi
  94
  95   # Find the revision of the local file
  96   f2rev=""
  97   if [ -r $file2 ]; then
  98     f2rev=`egrep "$pat" $file2 | head -1 | sed 's/[^0-9]//g'`
  99   fi
 100
 101   # Make the strings the same length to avoid comparison problems
 102   f1rev=`echo "0000000000"$f1rev | tail -c 10`
 103   f2rev=`echo "0000000000"$f2rev | tail -c 10`
 104
 105   # Test the order of the two revisions
 106   if [ $f1rev -ge $f2rev ]; then
 107     true ; return
 108   fi
 109
 110   false ; return
 111 }
 112
 113 #
 114 #  Install the files.
 115
 116 installfile () {
 117   BASE=`basename $1`
 118   if [ ! -e $BASE ]; then
 119     if [ -e ../include/linux/$BASE ]; then
 120       BASE=../include/linux/$BASE
 121     else
 122       echo Could not find source file $BASE !
 123       false ; return
 124     fi
 125   fi
 126   if newer $1 $BASE; then
 127     echo $1 is not older than $BASE, skipping
 128     return 0
 129   fi
 130   BACKUP=`echo $1 | sed 's/.c$/.old.c/;s/.h$/.old.h/'`
 131   if [ -f $1 -a $BACKUP != $1 ]; then
 132     echo Saving old $1 as `basename $BACKUP`
 133     mv $1 $BACKUP
 134     bombiffailed
 135   fi
 136   echo Installing new $1
 137   cp $BASE $1
 138   bombiffailed
 139   touch $1
 140   bombiffailed
 141 }
 142
 143 #
 144 # Check for the root user
 145 test_root() {
 146   my_uid=`id -u`
 147   my_name=`id -u -n`
 148   if [ $my_uid -ne 0 ]; then
 149     echo
 150     echo "********************************************************************"
 151     echo "Hello, $my_name. Since you are not running as the root user, it"
 152     echo "is possible that this script will fail to install the needed files."
 153     echo "If this happens then please use the root account and re-execute the"
 154     echo "'make kernel' command.  (This script is paused for 10 seconds.)"
 155     echo "********************************************************************"
 156     echo
 157     sleep 10s
 158   fi
 159 }
 160
 161 test_root
 162
 163 echo
 164 echo "Notice to the user:"
 165 echo
 166 echo "It is perfectly legal for this script to run without making any changes"
 167 echo "to your system. This means that the system currently contains the"
 168 echo "necessary changes to support this package. Please do not attempt to"
 169 echo "force this script to replace any file nor make any patch. If you do so"
 170 echo "then it is probable that you are actually putting older, buggier, code"
 171 echo "over the newer, fixed, code. Thank you."
 172 echo
 173 echo Installing into kernel version $KERNEL in $LINUXSRC
 174 echo
 175
 176 if [ -f $LINUXSRC/drivers/net/ppp.h ]; then
 177   echo Moving old $LINUXSRC/drivers/net/ppp.h file out of the way
 178   mv $LINUXSRC/drivers/net/ppp.h $LINUXSRC/drivers/net/ppp.old.h
 179   bombiffailed
 180 fi
 181
 182 for FILE in $LINUXSRC/drivers/net/bsd_comp.c \
 183             $LINUXSRC/drivers/net/ppp_deflate.c \
 184             $LINUXSRC/drivers/net/zlib.c \
 185             $LINUXSRC/drivers/net/zlib.h \
 186             $LINUXSRC/include/linux/if_ppp.h \
 187             $LINUXSRC/include/linux/if_pppvar.h \
 188             $LINUXSRC/include/linux/ppp-comp.h \
 189             $LINUXSRC/include/linux/ppp_defs.h
 190   do
 191   installfile $FILE no
 192 done
 193
 194 installfile $LINUXSRC/drivers/net/ppp.c yes
 195
 196 echo -n 'Adding BSD compression module to drivers makefile...'
 197 NETMK=$LINUXSRC/drivers/net/Makefile
 198 fgrep bsd_comp.o $NETMK >/dev/null
 199 if [ ! "$?" = "0" ]; then
 200    if [ -f $NETMK.orig ]; then
 201       mv $NETMK.orig $NETMK
 202    fi
 203    sed 's/ppp.o$/ppp.o bsd_comp.o/g' <$NETMK >$NETMK.temp
 204    bombiffailed
 205    echo -n '.'
 206    mv $NETMK $NETMK.orig
 207    bombiffailed
 208    echo -n '.'
 209    mv $NETMK.temp $NETMK
 210    bombiffailed
 211 else
 212    echo -n '(already there--skipping)'
 213 fi
 214 echo
 215 echo -n 'Adding Deflate compression module to drivers makefile...'
 216 NETMK=$LINUXSRC/drivers/net/Makefile
 217 fgrep ppp_deflate.o $NETMK >/dev/null
 218 if [ ! "$?" = "0" ]; then
 219    echo -n '.'
 220    sed 's/bsd_comp.o$/bsd_comp.o ppp_deflate.o/g' <$NETMK >$NETMK.temp
 221    bombiffailed
 222    echo -n '.'
 223    mv $NETMK $NETMK.orig
 224    bombiffailed
 225    echo -n '.'
 226    mv $NETMK.temp $NETMK
 227    bombiffailed
 228 else
 229    echo -n '(already there--skipping)'
 230 fi
 231 echo
 232
 233 # #
 234 # # install header stub files in /usr/include/net
 235
 236 # for FILE in if_ppp.h \
 237 #             if_pppvar.h \
 238 #             ppp-comp.h \
 239 #           if.h \
 240 #             ppp_defs.h
 241 #   do
 242 #   if [ ! -f /usr/include/net/$FILE ]; then
 243 #     echo Installing stub include file in /usr/include/net/$FILE
 244 #     echo "#include <linux/$FILE>" > /usr/include/net/$FILE
 245 #     bombiffailed
 246 #     chown 0:0 /usr/include/net/$FILE
 247 #     bombiffailed
 248 #     chmod 444 /usr/include/net/$FILE
 249 #     bombiffailed
 250 #     touch /usr/include/net/$FILE
 251 #     bombiffailed
 252 #   fi
 253 # done
 254
 255 echo "Kernel driver files installation done."
 256
 257 exit 0