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