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