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