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 "$grub_dir"
 112     # x86
 113     if [ -d /usr/lib/grub/i386-pc ]; then
 114         cp -a /usr/lib/grub/i386-pc/* "$grub_dir"
 115     # x86_64
 116     elif [ -d /usr/lib/grub/x86_64-pc ]; then
 117         cp -a /usr/lib/grub/x86_64-pc/* "$grub_dir"
 118     fi
 119 fi
 120 echo -n " grub1"
 121
 122 # create/update grub configuration
 123 if [ -e "$menu_file" ]; then
 124     # is there uncompatibile grub conf present?
 125     if ! grep -q 'AUTOMAGIC KERNELS LIST' "$menu_file"; then
 126         mv -f "$menu_file" "$menu_file.old"
 127     fi
 128 fi
 129 if [ ! -e "$menu_file" ]; then
 130     yes | /usr/sbin/update-grub >/dev/null 2>&1 || true
 131 else
 132     /usr/sbin/update-grub >/dev/null 2>&1 || true
 133 fi
 134 echo -n " grub2"
 135
 136 # workaround grsec
 137 if [ -x /sbin/chpax ]; then
 138     if [ -x /usr/sbin/grub ]; then
 139         chpax -spmrx /usr/sbin/grub || true
 140     fi
 141     if [ -x /usr/sbin/grub-probe ]; then
 142         chpax -spmrx /usr/sbin/grub-probe || true
 143     fi
 144 fi
 145 echo -n " grub3"
 146
 147 # workaround execshield
 148 SHIELD=$(sysctl -e -n kernel.exec-shield)
 149 if [ ! -z "$SHIELD" ]; then
 150     sysctl -e -w kernel.exec-shield=0 >/dev/null 2>&1
 151     echo -n " execshield1"
 152 fi
 153
 154 # remove obsolete devfs/compat links and restore normal udev behaviour
 155 rm -f /etc/udev/rules.d/devfs.rules /etc/udev/rules.d/compat.rules \
 156     /etc/udev/rules.d/compat-full.rules
 157 #if [ ! -e /etc/udev/rules.d/udev.rules ]; then
 158 #    ln -s ../udev.rules /etc/udev/rules.d/udev.rules
 159 #fi
 160 udevadm control --reload_rules >/dev/null 2>&1 || true
 161 udevsettle || true
 162 echo -n " udev"
 163
 164 # update device map if possible
 165 if [ -f "$device_map" ]; then
 166     mv -f "$device_map" "$device_map.old"
 167 fi
 168 grub --batch --no-floppy --device-map="$device_map" <<EOF >/dev/null 2>&1
 169 quit
 170 EOF
 171 if [ ! -s "$device_map" ]; then
 172     if [ -f "$device_map.old" ]; then
 173         mv -f "$device_map.old" "$device_map"
 174     fi
 175
 176 else
 177     rm -f "$device_map.old"
 178 fi
 179 echo -n " grub4"
 180
 181 # import GRUB helper functions (again, updated device map)
 182 . /usr/share/kernel-2.6-cn/grub-functions.sh
 183
 184 # get install device (0x80 BIOS device)
 185 install_device=$(grep '^(hd0)' "$device_map" | \
 186     sed -e 's%[^[:space:]]*[[:space:]]*\([^[:space:]]*\)%\1%')
 187 if [ -z "$install_device" ]; then
 188     echo "."
 189     echo "CN: FATAL ERROR while detecting boot disk!"
 190     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 191     exit 1
 192 fi
 193
 194 # oops, install device is a symlink...
 195 if [ -h "$install_device" ]; then
 196     install_device_resolved=$(resolve_symlink "$install_device")
 197     if [ -z "$install_device_resolved" ]; then
 198         install_device_resolved="$install_device"
 199     fi
 200
 201     # try to fix device map with symlink resolved device
 202     if [ "x$install_device_resolved" != "x$install_device" ]; then
 203         cp_check_and_sed '^\(hd0\)' \
 204             "s;^(hd0).*;(hd0)   $install_device_resolved;" "$device_map" \
 205             || true
 206     fi
 207 fi
 208 echo -n " grub5"
 209
 210 # install GRUB loader
 211 if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
 212     echo "."
 213     echo "CN: FATAL ERROR while running grub-install!"
 214     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 215     exit 1
 216 fi
 217 echo -n " grub6"
 218
 219 # fix possible wrong params in menu.lst
 220 cp_check_and_sed '^# groot=' \
 221   "s;^# groot=.*;# groot=$grub_root_device;g" \
 222       "$menu_file" || true
 223 cp_check_and_sed '^# kopt=' \
 224   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 225       "$menu_file" || true
 226 /usr/sbin/update-grub >/dev/null 2>&1 || true
 227 echo -n " grub7"
 228
 229 # and final stage of devfs/udev brokeness fix
 230 if [ "x$install_device_resolved" != "x$install_device" ]; then
 231     # get original (symlinked device)
 232     root_device=$(find_device_nonresolved "/")
 233     if [ -z "$root_device" ]; then
 234         root_device=$(find_root_device)
 235     fi
 236
 237     # fix (hd0) mapping
 238     cp_check_and_sed '^\(hd0\)' \
 239         "s;^(hd0).*;(hd0)       $install_device;" "$device_map" \
 240         || true
 241
 242     # fix global root= invocation
 243     cp_check_and_sed '^# kopt=' \
 244       "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 245           "$menu_file" || true
 246
 247     # fix root= invocation for individual kernel profiles
 248     cp_check_and_sed '^kernel' \
 249       "s;\(^kernel.*\)root=[^[:space:]]*\(.*\);\1root=$root_device\2;g" \
 250           "$menu_file" || true
 251 fi
 252 echo -n " grub8"
 253
 254 # restore execshield state
 255 if [ ! -z "$SHIELD" ]; then
 256     sysctl -e -w "kernel.exec-shield=$SHIELD" >/dev/null 2>&1
 257     echo -n " execshield2"
 258 fi
 259
 260 # disable lilo
 261 if [ -e /etc/lilo.conf ]; then
 262     mv -f /etc/lilo.conf /etc/lilo.conf.old
 263     echo -n " lilo"
 264 fi
 265
 266 # mdadm
 267 if [ -x /usr/share/mdadm/mkconf ]; then
 268     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 269         touch /etc/mdadm/mdadm.conf
 270     fi
 271
 272     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 273     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 274         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 275     fi
 276     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 277         /var/lib/mdadm/CONF-UNCHECKED
 278     echo -n " mdadm"
 279 fi
 280
 281 # update initramfs accordingly (because of mdadm and udev)
 282 update-initramfs -u -k all >/dev/null 2>&1 || true
 283 echo -n " initramfs"
 284
 285 # finished
 286 echo "."
 287
 288 ################################################################################
 289
 290 # rest of configuration...
 291 echo -n "CN: Modifying the neccessary system files:"
 292
 293 # remove group 99
 294 if getent group proc >/dev/null 2>&1; then
 295     groupdel proc >/dev/null 2>&1
 296     echo -n " proc"
 297 fi
 298
 299 # remove oidentd from oident group
 300 if getent group oident >/dev/null 2>&1; then
 301     # sarge default
 302     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 303       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 304           /etc/default/oidentd || true
 305
 306     # old kernel-2.6-cn default
 307     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 308       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 309           /etc/default/oidentd || true
 310
 311     echo -n " oidentd"
 312 fi
 313
 314 # default kernel parameters
 315 rm -f /etc/sysctl.conf.$$
 316 cat > /etc/sysctl.conf.$$ <<EOF
 317 kernel.exec-shield=3
 318 kernel.maps_protect=1
 319 net.core.rmem_default=1048576
 320 net.core.wmem_default=1048576
 321 net.ipv4.conf.all.accept_redirects=0
 322 net.ipv4.conf.all.accept_source_route=0
 323 net.ipv4.conf.all.log_martians=1
 324 net.ipv4.conf.all.rp_filter=1
 325 net.ipv4.conf.all.secure_redirects=1
 326 net.ipv4.conf.all.send_redirects=0
 327 net.ipv4.icmp_echo_ignore_broadcasts=1
 328 net.ipv4.icmp_ignore_bogus_error_responses=1
 329 net.ipv4.ip_forward=0
 330 net.ipv4.ip_local_port_range=10000 65000
 331 net.ipv4.tcp_congestion_control=cubic
 332 net.ipv4.tcp_ecn=0
 333 net.ipv4.tcp_max_syn_backlog=8192
 334 net.ipv4.tcp_retries1=2
 335 net.ipv4.tcp_rfc1337=1
 336 net.ipv4.tcp_syncookies=1
 337 vm.mmap_min_addr=65536
 338 EOF
 339
 340 # old kernel params
 341 if [ -e /etc/sysctl.conf ]; then
 342     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' \
 343         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 344 fi
 345
 346 # add sysctl.conf Debian headers
 347 rm -f /etc/sysctl.conf-head
 348 cat > /etc/sysctl.conf-head <<EOF
 349 #
 350 # /etc/sysctl.conf - Configuration file for setting system variables
 351 # See sysctl.conf (5) for information.
 352 #
 353 EOF
 354
 355 # merge old and new in one conf, primarily respecting old
 356 script='
 357 my %confhash = ();
 358 my ($key, $value);
 359 while (<>)
 360 {
 361   chomp();
 362   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 363   {
 364     my ($key, $value) = ($1, $2);
 365     $key =~ s/\//./go;
 366     $confhash{$key} = $value;
 367   }
 368 }
 369 for (sort { $a cmp $b } keys %confhash)
 370 {
 371   print $_, "=", $confhash{$_}, "\n";
 372 }
 373 '
 374 rm -f /etc/sysctl.conf-new
 375 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 376 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 377 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 378
 379 # finished with merging, move into sysctl.conf
 380 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 381 echo -n " sysctl.conf"
 382
 383 # finished with basic kernel-2.6-cn stuff
 384 echo "."
 385
 386 ################################################################################
 387
 388 # intro
 389 echo -n "CN: Setting up PAM configurations:"
 390
 391 # update pam_limits accordingly
 392 if [ -e /etc/security/limits.conf ]; then
 393     rm -f /etc/security/limits.conf.$$
 394     cp /etc/security/limits.conf /etc/security/limits.conf.$$
 395     cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<EOF
 396 *               soft    core            0
 397 *               hard    nofile          4096
 398 *               soft    nofile          4096
 399 EOF
 400     cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 401     echo -n " limits"
 402 fi
 403
 404 # check pam.d/login
 405 if [ -e /etc/pam.d/login ]; then
 406     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 407         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 408         /etc/pam.d/login || true
 409     echo -n " login"
 410 fi
 411
 412 # check pam.d/ssh
 413 if [ -e /etc/pam.d/ssh ]; then
 414     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 415         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 416         /etc/pam.d/ssh || true
 417     echo -n " ssh"
 418 fi
 419
 420 # finished with PAM
 421 echo "."
 422
 423 ################################################################################
 424
 425 # fix old kernel-2.4-cn postrm
 426 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 427     echo "CN: Fixed old kernel-2.4-cn postrm."
 428     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<EOF
 429 #!/bin/sh
 430
 431 set -e
 432
 433 # be sure, be safe
 434 if [ "$1" != "remove" ]; then
 435   exit 0
 436 fi
 437
 438 # import CN-functions
 439 . /usr/share/carnet-tools/functions.sh
 440
 441 # remove us from limits.conf
 442 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 443
 444 # remove us from modules
 445 cp-update -r kernel-2.4-cn /etc/modules
 446 EOF
 447     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 448         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 449         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 450             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 451         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 452     fi
 453     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 454 fi
 455
 456 ################################################################################
 457
 458 # fix old kernel-cn postrm
 459 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 460     echo "CN: Fixed old kernel-cn postrm."
 461     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<EOF
 462 #!/bin/sh
 463
 464 set -e
 465
 466 # be sure, be safe
 467 if [ "$1" != "remove" ]; then
 468   exit 0
 469 fi
 470
 471 # import CN-functions
 472 . /usr/share/carnet-tools/functions.sh
 473
 474 # remove us from limits.conf
 475 cp-update -r kernel-cn /etc/security/limits.conf
 476
 477 # remove us from modules
 478 cp-update -r kernel-cn /etc/modules
 479 EOF
 480     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 481         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 482         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 483             /var/lib/dpkg/info/kernel-cn.postrm
 484         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 485     fi
 486     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 487 fi
 488
 489 ################################################################################
 490
 491 # dh_installdeb will replace this with shell code automatically
 492 # generated by other debhelper scripts.
 493
 494 #DEBHELPER#
 495
 496 exit 0