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 "$grub_dir" ]; then
 111     mkdir -p "$grub_dir"
 112     if [ -d /usr/lib/grub/i386-pc ]; then
 113         cp -a /usr/lib/grub/i386-pc/* "$grub_dir"
 114     fi
 115 fi
 116 echo -n " grub1"
 117
 118 # create/update grub configuration
 119 if [ -e "$menu_file" ]; then
 120     # is there uncompatibile grub conf present?
 121     if ! grep -q 'AUTOMAGIC KERNELS LIST' "$menu_file"; then
 122         mv -f "$menu_file" "$menu_file.old"
 123     fi
 124 fi
 125 if [ ! -e "$menu_file" ]; then
 126     yes | /usr/sbin/update-grub >/dev/null 2>&1 || true
 127 else
 128     /usr/sbin/update-grub >/dev/null 2>&1 || true
 129 fi
 130 echo -n " grub2"
 131
 132 # workaround grsec
 133 if [ -x /sbin/chpax ]; then
 134     if [ -x /usr/sbin/grub ]; then
 135         chpax -spmrx /usr/sbin/grub || true
 136     fi
 137     if [ -x /usr/sbin/grub-probe ]; then
 138         chpax -spmrx /usr/sbin/grub-probe || true
 139     fi
 140 fi
 141 echo -n " grub3"
 142
 143 # workaround execshield
 144 SHIELD=$(sysctl -e -n kernel.exec-shield)
 145 if [ ! -z "$SHIELD" ]; then
 146     sysctl -w -e kernel.exec-shield=0 >/dev/null 2>&1
 147     echo -n " execshield1"
 148 fi
 149
 150 # remove obsolete devfs/compat links and restore normal udev behaviour
 151 rm -f /etc/udev/rules.d/devfs.rules /etc/udev/rules.d/compat.rules \
 152     /etc/udev/rules.d/compat-full.rules
 153 if [ ! -e /etc/udev/rules.d/udev.rules ]; then
 154     ln -s ../udev.rules /etc/udev/rules.d/udev.rules
 155 fi
 156 udevcontrol reload_rules >/dev/null 2>&1 || true
 157 echo -n " udev"
 158
 159 # update device map if possible
 160 if [ -f "$device_map" ]; then
 161     mv -f "$device_map" "$device_map.old"
 162 fi
 163 grub --batch --no-floppy --device-map="$device_map" <<EOF >/dev/null 2>&1
 164 quit
 165 EOF
 166 if [ ! -s "$device_map" ]; then
 167     if [ -f "$device_map.old" ]; then
 168         mv -f "$device_map.old" "$device_map"
 169     fi
 170 else
 171     rm -f "$device_map.old"
 172 fi
 173 echo -n " grub4"
 174
 175 # get install device (0x80 BIOS device)
 176 install_device=$(grep '^(hd0)' "$device_map" | \
 177     sed -e 's%[^[:space:]]*[[:space:]]*\([^[:space:]]*\)%\1%')
 178 if [ -z "$install_device" ]; then
 179     echo "."
 180     echo "CN: FATAL ERROR while detecting boot disk!"
 181     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 182     exit 1
 183 fi
 184
 185 # oops, install device is a symlink...
 186 if [ -h "$install_device" ]; then
 187     install_device_resolved=$(resolve_symlink "$install_device")
 188     if [ -z "$install_device_resolved" ]; then
 189         install_device_resolved="$install_device"
 190     fi
 191     # try to fix device map with symlink resolved device
 192     if [ "x$install_device_resolved" != "x$install_device" ]; then
 193         cp_check_and_sed '^(hd0)' \
 194             "s;^(hd0).*;(hd0)   $install_device_resolved" "$device_map" \
 195             || true
 196     fi
 197 fi
 198 echo -n " grub5"
 199
 200 # install GRUB loader
 201 if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
 202     echo "."
 203     echo "CN: FATAL ERROR while running grub-install!"
 204     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 205     exit 1
 206 fi
 207 echo -n " grub6"
 208
 209 # fix possible wrong params in menu.lst
 210 cp_check_and_sed '^# groot=' \
 211   "s;^# groot=.*;# groot=$grub_root_device;g" \
 212       "$menu_file" || true
 213 cp_check_and_sed '^# kopt=' \
 214   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 215       "$menu_file" || true
 216 /usr/sbin/update-grub >/dev/null 2>&1 || true
 217 echo -n " grub7"
 218
 219 # restore execshield state
 220 if [ ! -z "$SHIELD" ]; then
 221     sysctl -w -e "kernel.exec-shield=$SHIELD" >/dev/null 2>&1
 222     echo -n " execshield2"
 223 fi
 224
 225 # disable lilo
 226 if [ -e /etc/lilo.conf ]; then
 227     mv -f /etc/lilo.conf /etc/lilo.conf.old
 228     echo -n " lilo"
 229 fi
 230
 231 # mdadm
 232 if [ -x /usr/share/mdadm/mkconf ]; then
 233     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 234         touch /etc/mdadm/mdadm.conf
 235     fi
 236
 237     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 238     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 239         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 240     fi
 241     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 242         /var/lib/mdadm/CONF-UNCHECKED
 243     echo -n " mdadm"
 244 fi
 245
 246 # update initramfs accordingly (because of mdadm and udev)
 247 update-initramfs -u -k all >/dev/null 2>&1 || true
 248 echo -n " initramfs"
 249
 250 # finished
 251 echo "."
 252
 253 ################################################################################
 254
 255 # rest of configuration...
 256 echo -n "CN: Modifying the neccessary system files:"
 257
 258 # remove group 99
 259 if getent group proc >/dev/null 2>&1; then
 260     groupdel proc >/dev/null 2>&1
 261     echo -n " proc"
 262 fi
 263
 264 # remove oidentd from oident group
 265 if getent group oident >/dev/null 2>&1; then
 266     # sarge default
 267     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 268       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 269           /etc/default/oidentd || true
 270
 271     # old kernel-2.6-cn default
 272     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 273       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 274           /etc/default/oidentd || true
 275
 276     echo -n " oidentd"
 277 fi
 278
 279 # default kernel parameters
 280 rm -f /etc/sysctl.conf.$$
 281 cat > /etc/sysctl.conf.$$ <<EOF
 282 kernel.exec-shield=3
 283 kernel.maps_protect=1
 284 net.core.rmem_default=1048576
 285 net.core.wmem_default=1048576
 286 net.ipv4.conf.all.accept_redirects=0
 287 net.ipv4.conf.all.accept_source_route=0
 288 net.ipv4.conf.all.log_martians=1
 289 net.ipv4.conf.all.rp_filter=1
 290 net.ipv4.conf.all.secure_redirects=1
 291 net.ipv4.conf.all.send_redirects=0
 292 net.ipv4.icmp_echo_ignore_broadcasts=1
 293 net.ipv4.icmp_ignore_bogus_error_responses=1
 294 net.ipv4.ip_forward=0
 295 net.ipv4.ip_local_port_range=10000 65000
 296 net.ipv4.tcp_congestion_control=cubic
 297 net.ipv4.tcp_ecn=0
 298 net.ipv4.tcp_max_syn_backlog=8192
 299 net.ipv4.tcp_retries1=2
 300 net.ipv4.tcp_rfc1337=1
 301 net.ipv4.tcp_syncookies=1
 302 vm.mmap_min_addr=65536
 303 EOF
 304
 305 # old kernel params
 306 if [ -e /etc/sysctl.conf ]; then
 307     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' \
 308         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 309 fi
 310
 311 # add sysctl.conf Debian headers
 312 rm -f /etc/sysctl.conf-head
 313 cat > /etc/sysctl.conf-head <<EOF
 314 #
 315 # /etc/sysctl.conf - Configuration file for setting system variables
 316 # See sysctl.conf (5) for information.
 317 #
 318 EOF
 319
 320 # merge old and new in one conf, primarily respecting old
 321 script='
 322 my %confhash = ();
 323 my ($key, $value);
 324 while (<>)
 325 {
 326   chomp();
 327   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 328   {
 329     my ($key, $value) = ($1, $2);
 330     $key =~ s/\//./go;
 331     $confhash{$key} = $value;
 332   }
 333 }
 334 for (sort { $a cmp $b } keys %confhash)
 335 {
 336   print $_, "=", $confhash{$_}, "\n";
 337 }
 338 '
 339 rm -f /etc/sysctl.conf-new
 340 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 341 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 342 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 343
 344 # finished with merging, move into sysctl.conf
 345 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 346 echo -n " sysctl.conf"
 347
 348 # finished with basic kernel-2.6-cn stuff
 349 echo "."
 350
 351 ################################################################################
 352
 353 # intro
 354 echo -n "CN: Setting up PAM configurations:"
 355
 356 # update pam_limits accordingly
 357 if [ -e /etc/security/limits.conf ]; then
 358     rm -f /etc/security/limits.conf.$$
 359     cp /etc/security/limits.conf /etc/security/limits.conf.$$
 360     cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<EOF
 361 *               soft    core            0
 362 *               hard    nofile          4096
 363 *               soft    nofile          4096
 364 EOF
 365     cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 366     echo -n " limits"
 367 fi
 368
 369 # check pam.d/login
 370 if [ -e /etc/pam.d/login ]; then
 371     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 372         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 373         /etc/pam.d/login || true
 374     echo -n " login"
 375 fi
 376
 377 # check pam.d/ssh
 378 if [ -e /etc/pam.d/ssh ]; then
 379     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 380         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 381         /etc/pam.d/ssh || true
 382     echo -n " ssh"
 383 fi
 384
 385 # finished with PAM
 386 echo "."
 387
 388 ################################################################################
 389
 390 # fix old kernel-2.4-cn postrm
 391 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 392     echo "CN: Fixed old kernel-2.4-cn postrm."
 393     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<EOF
 394 #!/bin/sh
 395
 396 set -e
 397
 398 # be sure, be safe
 399 if [ "$1" != "remove" ]; then
 400   exit 0
 401 fi
 402
 403 # import CN-functions
 404 . /usr/share/carnet-tools/functions.sh
 405
 406 # remove us from limits.conf
 407 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 408
 409 # remove us from modules
 410 cp-update -r kernel-2.4-cn /etc/modules
 411 EOF
 412     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 413         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 414         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 415             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 416         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 417     fi
 418     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 419 fi
 420
 421 ################################################################################
 422
 423 # fix old kernel-cn postrm
 424 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 425     echo "CN: Fixed old kernel-cn postrm."
 426     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<EOF
 427 #!/bin/sh
 428
 429 set -e
 430
 431 # be sure, be safe
 432 if [ "$1" != "remove" ]; then
 433   exit 0
 434 fi
 435
 436 # import CN-functions
 437 . /usr/share/carnet-tools/functions.sh
 438
 439 # remove us from limits.conf
 440 cp-update -r kernel-cn /etc/security/limits.conf
 441
 442 # remove us from modules
 443 cp-update -r kernel-cn /etc/modules
 444 EOF
 445     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 446         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 447         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 448             /var/lib/dpkg/info/kernel-cn.postrm
 449         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 450     fi
 451     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 452 fi
 453
 454 ################################################################################
 455
 456 # dh_installdeb will replace this with shell code automatically
 457 # generated by other debhelper scripts.
 458
 459 #DEBHELPER#
 460
 461 exit 0