debian/postinst

   1 #!/bin/sh
   2 # postinst script for kernel-2.6-cn
   3 #
   4 # see: dh_installdeb(1)
   5
   6 set -e
   7
   8 # summary of how this script can be called:
   9 #        * <postinst> `configure' <most-recently-configured-version>
  10 #        * <old-postinst> `abort-upgrade' <new version>
  11 #        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
  12 #          <new-version>
  13 #        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
  14 #          <failed-install-package> <version> `removing'
  15 #          <conflicting-package> <version>
  16 # for details, see http://www.debian.org/doc/debian-policy/ or
  17 # the debian-policy package
  18 #
  19
  20 case "$1" in
  21     configure|reconfigure)
  22       # continue below
  23     ;;
  24
  25     *)
  26         exit 0
  27     ;;
  28 esac
  29
  30 # import CN-functions
  31 . /usr/share/carnet-tools/functions.sh
  32
  33 # import GRUB helper functions
  34 . /usr/share/kernel-2.6-cn/grub-functions.sh
  35
  36 ################################################################################
  37
  38 # starting up backup
  39 echo -n "CN: Backed up to /var/backups:"
  40
  41 # backup lilo.conf
  42 if [ -e /etc/lilo.conf ]; then
  43     cp_backup_conffile /etc/lilo.conf
  44     echo -n " lilo.conf"
  45 fi
  46
  47 # backup old kernel params
  48 if [ -e /etc/sysctl.conf ]; then
  49     cp_backup_conffile /etc/sysctl.conf
  50     echo -n " sysctl.conf"
  51 fi
  52
  53 # backup old kernel params
  54 if [ -e /etc/kernel-img.conf ]; then
  55     cp_backup_conffile /etc/kernel-img.conf
  56     echo -n " kernel-img.conf"
  57 fi
  58
  59 # finished
  60 echo "."
  61
  62 ################################################################################
  63
  64 # remove obsolete symlinks and kernels
  65 rm -f /boot/vmlinuz /boot/vmlinuz.old /boot/vmlinuz.old2 \
  66     /boot/vmlinuz.plain /vmlinuz /vmlinuz.old /boot/vmlinuz.plain \
  67     /boot/vmlinuz.generic /boot/vmlinuz-generic /boot/vmlinuz-old
  68 echo "CN: Removed old symlinks in / and /boot."
  69
  70 ################################################################################
  71
  72 # intro msg
  73 echo -n "CN: Configuring system (this will take a while):"
  74
  75 # generate kernel-img.conf
  76 if [ ! -e /etc/kernel-img.conf ]; then
  77     touch /etc/kernel-img.conf
  78 fi
  79
  80 # update postinst_hook for grub
  81 if grep -q postinst_hook /etc/kernel-img.conf; then
  82     cp_check_and_sed '^postinst_hook' \
  83         's;^postinst_hook[[:blank:]]*=.*;postinst_hook = /usr/sbin/update-grub;g' \
  84         /etc/kernel-img.conf || true
  85 else
  86     echo "postinst_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
  87 fi
  88
  89 # update postrm_hook for grub
  90 if grep -q postrm_hook /etc/kernel-img.conf; then
  91     cp_check_and_sed '^postrm_hook' \
  92         's;^postrm_hook[[:blank:]]*=.*;postrm_hook = /usr/sbin/update-grub;g' \
  93         /etc/kernel-img.conf || true
  94 else
  95     echo "postrm_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
  96 fi
  97
  98 # enable initrd
  99 if grep -q do_initrd /etc/kernel-img.conf; then
 100     cp_check_and_sed '^do_initrd' \
 101         's/^do_initrd[[:blank:]]*=.*/do_initrd = yes/g' \
 102         /etc/kernel-img.conf || true
 103 else
 104     echo "do_initrd = yes" >> /etc/kernel-img.conf
 105 fi
 106
 107 echo -n " kernel-img.conf"
 108
 109 # generate initial grub loaders
 110 if [ ! -d /boot/grub ]; then
 111     mkdir -p /boot/grub
 112     if [ -d /usr/lib/grub/i386-pc ]; then
 113         cp -a /usr/lib/grub/i386-pc/* /boot/grub
 114     fi
 115 fi
 116 echo -n " grub1"
 117
 118 # create/update grub configuration
 119 if [ -e /boot/grub/menu.lst ]; then
 120     # is there uncompatibile grub conf present?
 121     if ! grep -q 'AUTOMAGIC KERNELS LIST' /boot/grub/menu.lst; then
 122         mv -f /boot/grub/menu.lst /boot/grub/menu.lst.old
 123     fi
 124 fi
 125 if [ ! -e /boot/grub/menu.lst ]; then
 126     yes | /usr/sbin/update-grub >/dev/null 2>&1 || true
 127 else
 128     /usr/sbin/update-grub >/dev/null 2>&1 || true
 129 fi
 130 echo -n " grub2"
 131
 132 # workaround grsec
 133 if [ -x /sbin/chpax ]; then
 134     if [ -x /usr/sbin/grub ]; then
 135         chpax -spmrx /usr/sbin/grub || true
 136     fi
 137     if [ -x /usr/sbin/grub-probe ]; then
 138         chpax -spmrx /usr/sbin/grub-probe || true
 139     fi
 140 fi
 141 echo -n " grub3"
 142
 143 # workaround execshield
 144 SHIELD=$(sysctl -e -n kernel.exec-shield)
 145 if [ ! -z "$SHIELD" ]; then
 146     sysctl -w -e kernel.exec-shield=0 >/dev/null 2>&1
 147     echo -n " execshield1"
 148 fi
 149
 150 # remove obsolete devfs/compat links and restore normal udev behaviour
 151 rm -f /etc/udev/rules.d/devfs.rules /etc/udev/rules.d/compat.rules \
 152     /etc/udev/rules.d/compat-full.rules
 153 if [ ! -e /etc/udev/rules.d/udev.rules ]; then
 154     ln -s ../udev.rules /etc/udev/rules.d/udev.rules
 155 fi
 156 udevcontrol reload_rules >/dev/null 2>&1 || true
 157 echo -n " udev"
 158
 159 # update device map if possible
 160 device_map=/boot/grub/device.map
 161 if [ -f $device_map ]; then
 162     mv -f $device_map $device_map.old
 163 fi
 164 grub --batch --no-floppy --device-map=$device_map <<EOF >/dev/null 2>&1
 165 quit
 166 EOF
 167 if [ ! -s $device_map ]; then
 168     if [ -f $device_map.old ]; then
 169         mv -f $device_map.old $device_map
 170     fi
 171 else
 172     rm -f $device_map.old
 173 fi
 174 echo -n " grub4"
 175
 176 # install GRUB loader
 177 install_device=$(grep '^(hd0)' $device_map | \
 178     sed -e 's%[^[:space:]]*[[:space:]]*\([^[:space:]]*\)%\1%')
 179 if [ -z "$install_device" ]; then
 180     echo "."
 181     echo "CN: FATAL ERROR while detecting boot disk!"
 182     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 183     exit 1
 184 fi
 185 if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
 186     echo "."
 187     echo "CN: FATAL ERROR while running grub-install!"
 188     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 189     exit 1
 190 fi
 191 echo -n " grub5"
 192
 193 # fix possible wrong params in menu.lst
 194 cp_check_and_sed '^# groot=' \
 195   "s;^# groot=.*;# groot=$grub_root_device;g" \
 196       /boot/grub/menu.lst || true
 197 cp_check_and_sed '^# kopt=' \
 198   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 199       /boot/grub/menu.lst || true
 200 /usr/sbin/update-grub >/dev/null 2>&1 || true
 201 echo -n " grub6"
 202
 203 # restore execshield state
 204 if [ ! -z "$SHIELD" ]; then
 205     sysctl -w -e "kernel.exec-shield=$SHIELD" >/dev/null 2>&1
 206     echo -n " execshield2"
 207 fi
 208
 209 # disable lilo
 210 if [ -e /etc/lilo.conf ]; then
 211     mv -f /etc/lilo.conf /etc/lilo.conf.old
 212     echo -n " lilo"
 213 fi
 214
 215 # mdadm
 216 if [ -x /usr/share/mdadm/mkconf ]; then
 217     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 218         touch /etc/mdadm/mdadm.conf
 219     fi
 220
 221     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 222     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 223         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 224     fi
 225     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 226         /var/lib/mdadm/CONF-UNCHECKED
 227     echo -n " mdadm"
 228 fi
 229
 230 # update initramfs accordingly
 231 update-initramfs -u -k all >/dev/null 2>&1 || true
 232 echo -n " initramfs"
 233
 234 # finished
 235 echo "."
 236
 237 ################################################################################
 238
 239 # rest of configuration...
 240 echo -n "CN: Modifying the neccessary system files:"
 241
 242 # remove group 99
 243 if getent group proc >/dev/null 2>&1; then
 244     groupdel proc >/dev/null 2>&1
 245     echo -n " proc"
 246 fi
 247
 248 # remove oidentd from oident group
 249 if getent group oident >/dev/null 2>&1; then
 250     # sarge default
 251     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 252       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 253           /etc/default/oidentd || true
 254
 255     # old kernel-2.6-cn default
 256     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 257       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 258           /etc/default/oidentd || true
 259
 260     echo -n " oidentd"
 261 fi
 262
 263 # default kernel parameters
 264 rm -f /etc/sysctl.conf.$$
 265 cat > /etc/sysctl.conf.$$ <<EOF
 266 kernel.exec-shield=3
 267 kernel.maps_protect=1
 268 net.core.rmem_default=1048576
 269 net.core.wmem_default=1048576
 270 net.ipv4.conf.all.accept_redirects=0
 271 net.ipv4.conf.all.accept_source_route=0
 272 net.ipv4.conf.all.log_martians=1
 273 net.ipv4.conf.all.rp_filter=1
 274 net.ipv4.conf.all.secure_redirects=1
 275 net.ipv4.conf.all.send_redirects=0
 276 net.ipv4.icmp_echo_ignore_broadcasts=1
 277 net.ipv4.icmp_ignore_bogus_error_responses=1
 278 net.ipv4.ip_forward=0
 279 net.ipv4.ip_local_port_range=10000 65000
 280 net.ipv4.tcp_congestion_control=cubic
 281 net.ipv4.tcp_ecn=0
 282 net.ipv4.tcp_max_syn_backlog=8192
 283 net.ipv4.tcp_retries1=2
 284 net.ipv4.tcp_rfc1337=1
 285 net.ipv4.tcp_syncookies=1
 286 vm.mmap_min_addr=65536
 287 EOF
 288
 289 # old kernel params
 290 if [ -e /etc/sysctl.conf ]; then
 291     egrep -v 'net\.core\.(r|w)mem_max|net\.ipv4\.tcp_(r|w)mem|vm\.bdflush|net\.ipv4\.ip_local_port_range|kernel\.rtsig-max|net\.ipv4\.tcp_syncookies' \
 292         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 293 fi
 294
 295 # add sysctl.conf Debian headers
 296 rm -f /etc/sysctl.conf-head
 297 cat > /etc/sysctl.conf-head <<EOF
 298 #
 299 # /etc/sysctl.conf - Configuration file for setting system variables
 300 # See sysctl.conf (5) for information.
 301 #
 302 EOF
 303
 304 # merge old and new in one conf, primarily respecting old
 305 script='
 306 my %confhash = ();
 307 my ($key, $value);
 308 while (<>)
 309 {
 310   chomp();
 311   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 312   {
 313     my ($key, $value) = ($1, $2);
 314     $key =~ s/\//./go;
 315     $confhash{$key} = $value;
 316   }
 317 }
 318 for (sort { $a cmp $b } keys %confhash)
 319 {
 320   print $_, "=", $confhash{$_}, "\n";
 321 }
 322 '
 323 rm -f /etc/sysctl.conf-new
 324 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 325 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 326 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 327
 328 # finished with merging, move into sysctl.conf
 329 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 330 echo -n " sysctl.conf"
 331
 332 # finished with basic kernel-2.6-cn stuff
 333 echo "."
 334
 335 ################################################################################
 336
 337 # intro
 338 echo -n "CN: Setting up PAM configurations:"
 339
 340 # update pam_limits accordingly
 341 if [ -e /etc/security/limits.conf ]; then
 342     rm -f /etc/security/limits.conf.$$
 343     cp /etc/security/limits.conf /etc/security/limits.conf.$$
 344     cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<EOF
 345 *               soft    core            0
 346 *               hard    nofile          4096
 347 *               soft    nofile          4096
 348 EOF
 349     cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 350     echo -n " limits"
 351 fi
 352
 353 # check pam.d/login
 354 if [ -e /etc/pam.d/login ]; then
 355     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 356         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 357         /etc/pam.d/login || true
 358     echo -n " login"
 359 fi
 360
 361 # check pam.d/ssh
 362 if [ -e /etc/pam.d/ssh ]; then
 363     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 364         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 365         /etc/pam.d/ssh || true
 366     echo -n " ssh"
 367 fi
 368
 369 # finished with PAM
 370 echo "."
 371
 372 ################################################################################
 373
 374 # fix old kernel-2.4-cn postrm
 375 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 376     echo "CN: Fixed old kernel-2.4-cn postrm."
 377     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<EOF
 378 #!/bin/sh
 379
 380 set -e
 381
 382 # be sure, be safe
 383 if [ "$1" != "remove" ]; then
 384   exit 0
 385 fi
 386
 387 # import CN-functions
 388 . /usr/share/carnet-tools/functions.sh
 389
 390 # remove us from limits.conf
 391 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 392
 393 # remove us from modules
 394 cp-update -r kernel-2.4-cn /etc/modules
 395 EOF
 396     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 397         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 398         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 399             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 400         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 401     fi
 402     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 403 fi
 404
 405 ################################################################################
 406
 407 # fix old kernel-cn postrm
 408 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 409     echo "CN: Fixed old kernel-cn postrm."
 410     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<EOF
 411 #!/bin/sh
 412
 413 set -e
 414
 415 # be sure, be safe
 416 if [ "$1" != "remove" ]; then
 417   exit 0
 418 fi
 419
 420 # import CN-functions
 421 . /usr/share/carnet-tools/functions.sh
 422
 423 # remove us from limits.conf
 424 cp-update -r kernel-cn /etc/security/limits.conf
 425
 426 # remove us from modules
 427 cp-update -r kernel-cn /etc/modules
 428 EOF
 429     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 430         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 431         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 432             /var/lib/dpkg/info/kernel-cn.postrm
 433         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 434     fi
 435     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 436 fi
 437
 438 ################################################################################
 439
 440 # dh_installdeb will replace this with shell code automatically
 441 # generated by other debhelper scripts.
 442
 443 #DEBHELPER#
 444
 445 exit 0