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 # Source debconf library.
  31 . /usr/share/debconf/confmodule
  32
  33 # import CN-functions
  34 . /usr/share/carnet-tools/functions.sh
  35
  36 # import GRUB helper functions
  37 . /usr/share/kernel-2.6-cn/grub-functions.sh
  38
  39 ################################################################################
  40
  41 # starting up backup
  42 echo -n "CN: Backed up to /var/backups:"
  43
  44 # backup lilo.conf
  45 if [ -e /etc/lilo.conf ]; then
  46     cp_backup_conffile /etc/lilo.conf
  47     echo -n " lilo.conf"
  48 fi
  49
  50 # backup old kernel params
  51 if [ -e /etc/sysctl.conf ]; then
  52     cp_backup_conffile /etc/sysctl.conf
  53     echo -n " sysctl.conf"
  54 fi
  55
  56 # backup old kernel params
  57 if [ -e /etc/kernel-img.conf ]; then
  58     cp_backup_conffile /etc/kernel-img.conf
  59     echo -n " kernel-img.conf"
  60 fi
  61
  62 # finished
  63 echo "."
  64
  65 ################################################################################
  66
  67 # remove obsolete symlinks and kernels
  68 rm -f /boot/vmlinuz /boot/vmlinuz.old /boot/vmlinuz.old2 \
  69     /boot/vmlinuz.plain /vmlinuz /vmlinuz.old /boot/vmlinuz.plain \
  70     /boot/vmlinuz.generic /boot/vmlinuz-generic /boot/vmlinuz-old
  71 echo "CN: Removed old symlinks in / and /boot."
  72
  73 ################################################################################
  74
  75 DIVERT_TO="grub grub-probe"
  76
  77 echo -n "CN: Undiverting binaries:"
  78 for i in $DIVERT_TO; do
  79     if [ -e /usr/sbin/$i.real ]; then
  80             dpkg-divert --remove --rename --package 'kernel-2.6-cn' \
  81                 --divert /usr/sbin/$i.real /usr/sbin/$i >/dev/null
  82         echo -n " $i"
  83     fi
  84 done
  85 echo "."
  86
  87 ################################################################################
  88
  89 # intro msg
  90 echo -n "CN: Configuring system (this will take a while):"
  91
  92 # generate kernel-img.conf
  93 if [ ! -e /etc/kernel-img.conf ]; then
  94     touch /etc/kernel-img.conf
  95 fi
  96
  97 # update postinst_hook for grub
  98 if grep -q postinst_hook /etc/kernel-img.conf; then
  99     cp_check_and_sed '^postinst_hook' \
 100         's;^postinst_hook[[:blank:]]*=.*;postinst_hook = /usr/sbin/update-grub;g' \
 101         /etc/kernel-img.conf || true
 102 else
 103     echo "postinst_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
 104 fi
 105
 106 # update postrm_hook for grub
 107 if grep -q postrm_hook /etc/kernel-img.conf; then
 108     cp_check_and_sed '^postrm_hook' \
 109         's;^postrm_hook[[:blank:]]*=.*;postrm_hook = /usr/sbin/update-grub;g' \
 110         /etc/kernel-img.conf || true
 111 else
 112     echo "postrm_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
 113 fi
 114
 115 # enable initrd
 116 if grep -q do_initrd /etc/kernel-img.conf; then
 117     cp_check_and_sed '^do_initrd' \
 118         's/^do_initrd[[:blank:]]*=.*/do_initrd = yes/g' \
 119         /etc/kernel-img.conf || true
 120 else
 121     echo "do_initrd = yes" >> /etc/kernel-img.conf
 122 fi
 123
 124 echo -n " kernel-img.conf"
 125
 126 # generate initial grub loaders
 127 if [ ! -d "$grub_dir" ]; then
 128     mkdir -p "$grub_dir"
 129     # x86
 130     if [ -d /usr/lib/grub/i386-pc ]; then
 131         cp -a /usr/lib/grub/i386-pc/* "$grub_dir"
 132     # x86_64
 133     elif [ -d /usr/lib/grub/x86_64-pc ]; then
 134         cp -a /usr/lib/grub/x86_64-pc/* "$grub_dir"
 135     fi
 136 fi
 137 echo -n " grub1"
 138
 139 # create/update grub configuration
 140 if [ -e "$menu_file" ]; then
 141     # is there uncompatibile grub conf present?
 142     if ! grep -q 'AUTOMAGIC KERNELS LIST' "$menu_file"; then
 143         mv -f "$menu_file" "$menu_file.old"
 144     fi
 145 fi
 146 if [ ! -e "$menu_file" ]; then
 147     yes | /usr/sbin/update-grub >/dev/null 2>&1 || true
 148 else
 149     /usr/sbin/update-grub >/dev/null 2>&1 || true
 150 fi
 151 echo -n " grub2"
 152
 153 # workaround grsec
 154 if uname -a | grep -q grsec; then
 155     if [ -x /sbin/chpax ]; then
 156         # grub
 157         if [ -x /usr/sbin/grub.real ]; then
 158             chpax -spmrx /usr/sbin/grub.real >/dev/null 2>&1 || true
 159         elif [ -x /usr/sbin/grub ]; then
 160             chpax -spmrx /usr/sbin/grub >/dev/null 2>&1 || true
 161         fi
 162
 163         # grub-probe
 164         if [ -x /usr/sbin/grub-probe.real ]; then
 165             chpax -spmrx /usr/sbin/grub-probe.real >/dev/null 2>&1 || true
 166         elif [ -x /usr/sbin/grub-probe ]; then
 167             chpax -spmrx /usr/sbin/grub-probe >/dev/null 2>&1 || true
 168         fi
 169
 170         echo -n " grsec"
 171     fi
 172 fi
 173
 174 # remove obsolete devfs/compat links and restore normal udev behaviour
 175 rm -f /etc/udev/rules.d/devfs.rules /etc/udev/rules.d/compat.rules \
 176     /etc/udev/rules.d/compat-full.rules
 177 #if [ ! -e /etc/udev/rules.d/udev.rules ]; then
 178 #    ln -s ../udev.rules /etc/udev/rules.d/udev.rules
 179 #fi
 180 udevadm control --reload_rules >/dev/null 2>&1 || true
 181 udevsettle || true
 182 echo -n " udev"
 183
 184 # update device map if possible
 185 if [ -f "$device_map" ]; then
 186     mv -f "$device_map" "$device_map.old"
 187 fi
 188 grub --batch --no-floppy --device-map="$device_map" <<'EOF' >/dev/null 2>&1
 189 quit
 190 EOF
 191 if [ ! -s "$device_map" ]; then
 192     if [ -f "$device_map.old" ]; then
 193         mv -f "$device_map.old" "$device_map"
 194     fi
 195
 196 else
 197     rm -f "$device_map.old"
 198 fi
 199 echo -n " grub3"
 200
 201 # import GRUB helper functions (again, updated device map)
 202 . /usr/share/kernel-2.6-cn/grub-functions.sh
 203
 204 # get install device (0x80 BIOS device)
 205 install_device=$(grep '^(hd0)' "$device_map" | \
 206     sed -e 's%[^[:space:]]*[[:space:]]*\([^[:space:]]*\)%\1%')
 207 if [ -z "$install_device" ]; then
 208     echo "."
 209     echo "CN: FATAL ERROR while detecting boot disk!"
 210     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 211     exit 1
 212 fi
 213
 214 # oops, install device is a symlink...
 215 if [ -h "$install_device" ]; then
 216     install_device_resolved=$(resolve_symlink "$install_device")
 217     if [ -z "$install_device_resolved" ]; then
 218         install_device_resolved="$install_device"
 219     fi
 220
 221     # try to fix device map with symlink resolved device
 222     if [ "x$install_device_resolved" != "x$install_device" ]; then
 223         cp_check_and_sed '^\(hd0\)' \
 224             "s;^(hd0).*;(hd0)   $install_device_resolved;" "$device_map" \
 225             || true
 226     fi
 227 fi
 228 echo -n " grub4"
 229
 230 # install GRUB loader
 231 if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
 232     echo "."
 233     echo "CN: FATAL ERROR while running grub-install!"
 234     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 235     exit 1
 236 fi
 237 echo -n " grub5"
 238
 239 # fix possible wrong params in menu.lst
 240 cp_check_and_sed '^# groot=' \
 241   "s;^# groot=.*;# groot=$grub_root_device;g" \
 242       "$menu_file" || true
 243 cp_check_and_sed '^# kopt=' \
 244   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 245       "$menu_file" || true
 246 /usr/sbin/update-grub >/dev/null 2>&1 || true
 247 echo -n " grub6"
 248
 249 # and final stage of devfs/udev brokeness fix
 250 if [ "x$install_device_resolved" != "x$install_device" ]; then
 251     # get original (symlinked device)
 252     root_device=$(find_device_nonresolved "/")
 253     if [ -z "$root_device" ]; then
 254         root_device=$(find_root_device)
 255     fi
 256
 257     # fix (hd0) mapping
 258     cp_check_and_sed '^\(hd0\)' \
 259         "s;^(hd0).*;(hd0)       $install_device;" "$device_map" \
 260         || true
 261
 262     # fix global root= invocation
 263     cp_check_and_sed '^# kopt=' \
 264       "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 265           "$menu_file" || true
 266
 267     # fix root= invocation for individual kernel profiles
 268     cp_check_and_sed '^kernel' \
 269       "s;\(^kernel.*\)root=[^[:space:]]*\(.*\);\1root=$root_device\2;g" \
 270           "$menu_file" || true
 271 fi
 272 echo -n " grub7"
 273
 274 # disable lilo
 275 if [ -e /etc/lilo.conf ]; then
 276     mv -f /etc/lilo.conf /etc/lilo.conf.old
 277     echo -n " lilo"
 278 fi
 279
 280 # mdadm
 281 if [ -x /usr/share/mdadm/mkconf ]; then
 282     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 283         touch /etc/mdadm/mdadm.conf
 284     fi
 285
 286     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 287     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 288         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 289     fi
 290     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 291         /var/lib/mdadm/CONF-UNCHECKED
 292     echo -n " mdadm"
 293 fi
 294
 295 # update initramfs accordingly (because of mdadm and udev)
 296 update-initramfs -u -k all >/dev/null 2>&1 || true
 297 echo -n " initramfs"
 298
 299 # finished
 300 echo "."
 301
 302 ################################################################################
 303
 304 # rest of configuration...
 305 echo -n "CN: Modifying the neccessary system files:"
 306
 307 # remove group 99
 308 if getent group proc >/dev/null 2>&1; then
 309     groupdel proc >/dev/null 2>&1
 310     echo -n " proc"
 311 fi
 312
 313 # remove oidentd from oident group
 314 if getent group oident >/dev/null 2>&1; then
 315     # sarge default
 316     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 317       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 318           /etc/default/oidentd || true
 319
 320     # old kernel-2.6-cn default
 321     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 322       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 323           /etc/default/oidentd || true
 324
 325     echo -n " oidentd"
 326 fi
 327
 328 # default kernel parameters
 329 rm -f /etc/sysctl.conf.$$
 330 cat > /etc/sysctl.conf.$$ <<'EOF'
 331 kernel.maps_protect=1
 332 net.core.rmem_default=1048576
 333 net.core.wmem_default=1048576
 334 net.ipv4.conf.all.accept_redirects=0
 335 net.ipv4.conf.all.accept_source_route=0
 336 net.ipv4.conf.all.log_martians=1
 337 net.ipv4.conf.all.rp_filter=1
 338 net.ipv4.conf.all.secure_redirects=1
 339 net.ipv4.conf.all.send_redirects=0
 340 net.ipv4.icmp_echo_ignore_broadcasts=1
 341 net.ipv4.icmp_ignore_bogus_error_responses=1
 342 net.ipv4.ip_forward=0
 343 net.ipv4.ip_local_port_range=10000 65000
 344 net.ipv4.tcp_ecn=0
 345 net.ipv4.tcp_max_syn_backlog=1024
 346 net.ipv4.tcp_retries1=2
 347 net.ipv4.tcp_rfc1337=1
 348 net.ipv4.tcp_syncookies=1
 349 vm.mmap_min_addr=65536
 350 EOF
 351
 352 # old kernel params (skipping some of the obsolete or overrided entries)
 353 if [ -e /etc/sysctl.conf ]; then
 354     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|kernel\.exec-shield|net\.ipv4\.tcp_max_syn_backlog|net\.ipv4\.tcp_congestion_control|kernel\.exec-shield' \
 355         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 356 fi
 357
 358 # add sysctl.conf Debian headers
 359 rm -f /etc/sysctl.conf-head
 360 cat > /etc/sysctl.conf-head <<'EOF'
 361 #
 362 # /etc/sysctl.conf - Configuration file for setting system variables
 363 # See sysctl.conf (5) for information.
 364 #
 365 EOF
 366
 367 # merge old and new in one conf, primarily respecting old
 368 script='
 369 my %confhash = ();
 370 my ($key, $value);
 371 while (<>)
 372 {
 373   chomp();
 374   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 375   {
 376     my ($key, $value) = ($1, $2);
 377     $key =~ s/\//./go;
 378     $confhash{$key} = $value;
 379   }
 380 }
 381 for (sort { $a cmp $b } keys %confhash)
 382 {
 383   print $_, "=", $confhash{$_}, "\n";
 384 }
 385 '
 386 rm -f /etc/sysctl.conf-new
 387 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 388 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 389 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 390
 391 # finished with merging, move into sysctl.conf
 392 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 393 echo -n " sysctl.conf"
 394
 395 # finished with basic kernel-2.6-cn stuff
 396 echo "."
 397
 398 ################################################################################
 399
 400 # intro
 401 echo -n "CN: Setting up PAM configurations:"
 402
 403 # update pam_limits accordingly
 404 if [ -e /etc/security/limits.conf ]; then
 405     rm -f /etc/security/limits.conf.$$
 406     cp /etc/security/limits.conf /etc/security/limits.conf.$$
 407     cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<'EOF'
 408 *               soft    core            0
 409 *               hard    nofile          4096
 410 *               soft    nofile          4096
 411 EOF
 412     cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 413     echo -n " limits"
 414 fi
 415
 416 # check pam.d/login
 417 if [ -e /etc/pam.d/login ]; then
 418     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 419         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 420         /etc/pam.d/login || true
 421     echo -n " login"
 422 fi
 423
 424 # check pam.d/ssh
 425 if [ -e /etc/pam.d/ssh ]; then
 426     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 427         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 428         /etc/pam.d/ssh || true
 429     echo -n " ssh"
 430 fi
 431
 432 # finished with PAM
 433 echo "."
 434
 435 ################################################################################
 436
 437 # fix old kernel-2.4-cn postrm
 438 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 439     echo "CN: Fixed old kernel-2.4-cn postrm."
 440     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<'EOF'
 441 #!/bin/sh
 442
 443 set -e
 444
 445 # be sure, be safe
 446 if [ "$1" != "remove" ]; then
 447   exit 0
 448 fi
 449
 450 # import CN-functions
 451 . /usr/share/carnet-tools/functions.sh
 452
 453 # remove us from limits.conf
 454 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 455
 456 # remove us from modules
 457 cp-update -r kernel-2.4-cn /etc/modules
 458 EOF
 459     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 460         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 461         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 462             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 463         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 464     fi
 465     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 466 fi
 467
 468 ################################################################################
 469
 470 # fix old kernel-cn postrm
 471 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 472     echo "CN: Fixed old kernel-cn postrm."
 473     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<'EOF'
 474 #!/bin/sh
 475
 476 set -e
 477
 478 # be sure, be safe
 479 if [ "$1" != "remove" ]; then
 480   exit 0
 481 fi
 482
 483 # import CN-functions
 484 . /usr/share/carnet-tools/functions.sh
 485
 486 # remove us from limits.conf
 487 cp-update -r kernel-cn /etc/security/limits.conf
 488
 489 # remove us from modules
 490 cp-update -r kernel-cn /etc/modules
 491 EOF
 492     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 493         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 494         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 495             /var/lib/dpkg/info/kernel-cn.postrm
 496         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 497     fi
 498     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 499 fi
 500
 501 ################################################################################
 502
 503 # dh_installdeb will replace this with shell code automatically
 504 # generated by other debhelper scripts.
 505
 506 #DEBHELPER#
 507
 508 exit 0