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 /boot/grub ]; then
 111     mkdir -p /boot/grub
 112     if [ -d /usr/lib/grub/i386-pc ]; then
 113         cp -a /usr/lib/grub/i386-pc/* /boot/grub
 114     fi
 115 fi
 116 echo -n " grub1"
 117
 118 # create/update grub configuration
 119 if [ -e /boot/grub/menu.lst ]; then
 120     # is there uncompatibile grub conf present?
 121     if ! grep -q 'AUTOMAGIC KERNELS LIST' /boot/grub/menu.lst; then
 122         mv -f /boot/grub/menu.lst /boot/grub/menu.lst.old
 123     fi
 124 fi
 125 if [ ! -e /boot/grub/menu.lst ]; 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 "$SHIELD" ]; then
 146     sysctl -w -e kernel.exec-shield=0 >/dev/null 2>&1
 147     echo -n " execshield1"
 148 fi
 149
 150 # remove obsolete devfs/compat links and restore normal udev behaviour
 151 rm -f /etc/udev/rules.d/devfs.rules /etc/udev/rules.d/compat.rules \
 152     /etc/udev/rules.d/compat-full.rules
 153 if [ ! -e /etc/udev/rules.d/udev.rules ]; then
 154     ln -s ../udev.rules /etc/udev/rules.d/udev.rules
 155 fi
 156 udevcontrol reload_rules >/dev/null 2>&1 || true
 157 echo -n " udev"
 158
 159 # install grub loader
 160 if ! grub-install --no-floppy '(hd0)' >/dev/null 2>&1; then
 161     echo "."
 162     echo "CN: FATAL ERROR running grub-install!"
 163     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 164     exit 1
 165 fi
 166 echo -n " grub4"
 167
 168 # fix possible wrong params in menu.lst
 169 cp_check_and_sed '^# groot=' \
 170   "s;^# groot=.*;# groot=$grub_root_device;g" \
 171       /boot/grub/menu.lst || true
 172 cp_check_and_sed '^# kopt=' \
 173   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 174       /boot/grub/menu.lst || true
 175 /usr/sbin/update-grub >/dev/null 2>&1 || true
 176 echo -n " grub5"
 177
 178 # restore execshield state
 179 if [ ! -z "$SHIELD" ]; then
 180     sysctl -w -e "kernel.exec-shield=$SHIELD" >/dev/null 2>&1
 181     echo -n " execshield2"
 182 fi
 183
 184 # disable lilo
 185 if [ -e /etc/lilo.conf ]; then
 186     mv -f /etc/lilo.conf /etc/lilo.conf.old
 187     echo -n " lilo"
 188 fi
 189
 190 # mdadm
 191 if [ -x /usr/share/mdadm/mkconf ]; then
 192     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 193         touch /etc/mdadm/mdadm.conf
 194     fi
 195
 196     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 197     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 198         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 199     fi
 200     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 201         /var/lib/mdadm/CONF-UNCHECKED
 202     echo -n " mdadm"
 203 fi
 204
 205 # update initramfs accordingly
 206 update-initramfs -u -k all >/dev/null 2>&1 || true
 207 echo -n " initramfs"
 208
 209 # finished
 210 echo "."
 211
 212 ################################################################################
 213
 214 # rest of configuration...
 215 echo -n "CN: Modifying the neccessary system files:"
 216
 217 # remove group 99
 218 if getent group proc >/dev/null 2>&1; then
 219     groupdel proc >/dev/null 2>&1
 220     echo -n " proc"
 221 fi
 222
 223 # remove oidentd from oident group
 224 if getent group oident >/dev/null 2>&1; then
 225     # sarge default
 226     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 227       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 228           /etc/default/oidentd || true
 229
 230     # old kernel-2.6-cn default
 231     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 232       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 233           /etc/default/oidentd || true
 234
 235     echo -n " oidentd"
 236 fi
 237
 238 # default kernel parameters
 239 rm -f /etc/sysctl.conf.$$
 240 cat > /etc/sysctl.conf.$$ <<EOF
 241 kernel.exec-shield=3
 242 kernel.maps_protect=1
 243 net.core.rmem_default=1048576
 244 net.core.wmem_default=1048576
 245 net.ipv4.conf.all.accept_redirects=0
 246 net.ipv4.conf.all.accept_source_route=0
 247 net.ipv4.conf.all.log_martians=1
 248 net.ipv4.conf.all.rp_filter=1
 249 net.ipv4.conf.all.secure_redirects=1
 250 net.ipv4.conf.all.send_redirects=0
 251 net.ipv4.icmp_echo_ignore_broadcasts=1
 252 net.ipv4.icmp_ignore_bogus_error_responses=1
 253 net.ipv4.ip_forward=0
 254 net.ipv4.ip_local_port_range=10000 65000
 255 net.ipv4.tcp_congestion_control=cubic
 256 net.ipv4.tcp_ecn=0
 257 net.ipv4.tcp_max_syn_backlog=8192
 258 net.ipv4.tcp_retries1=2
 259 net.ipv4.tcp_rfc1337=1
 260 net.ipv4.tcp_syncookies=1
 261 vm.mmap_min_addr=65536
 262 EOF
 263
 264 # old kernel params
 265 if [ -e /etc/sysctl.conf ]; then
 266     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' \
 267         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 268 fi
 269
 270 # add sysctl.conf Debian headers
 271 rm -f /etc/sysctl.conf-head
 272 cat > /etc/sysctl.conf-head <<EOF
 273 #
 274 # /etc/sysctl.conf - Configuration file for setting system variables
 275 # See sysctl.conf (5) for information.
 276 #
 277 EOF
 278
 279 # merge old and new in one conf, primarily respecting old
 280 script='
 281 my %confhash = ();
 282 my ($key, $value);
 283 while (<>)
 284 {
 285   chomp();
 286   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 287   {
 288     my ($key, $value) = ($1, $2);
 289     $key =~ s/\//./go;
 290     $confhash{$key} = $value;
 291   }
 292 }
 293 for (sort { $a cmp $b } keys %confhash)
 294 {
 295   print $_, "=", $confhash{$_}, "\n";
 296 }
 297 '
 298 rm -f /etc/sysctl.conf-new
 299 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 300 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 301 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 302
 303 # finished with merging, move into sysctl.conf
 304 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 305 echo -n " sysctl.conf"
 306
 307 # finished with basic kernel-2.6-cn stuff
 308 echo "."
 309
 310 ################################################################################
 311
 312 # intro
 313 echo -n "CN: Setting up PAM configurations:"
 314
 315 # update pam_limits accordingly
 316 if [ -e /etc/security/limits.conf ]; then
 317     rm -f /etc/security/limits.conf.$$
 318     cp /etc/security/limits.conf /etc/security/limits.conf.$$
 319     cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<EOF
 320 *               soft    core            0
 321 *               hard    nofile          4096
 322 *               soft    nofile          4096
 323 EOF
 324     cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 325     echo -n " limits"
 326 fi
 327
 328 # check pam.d/login
 329 if [ -e /etc/pam.d/login ]; then
 330     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 331         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 332         /etc/pam.d/login || true
 333     echo -n " login"
 334 fi
 335
 336 # check pam.d/ssh
 337 if [ -e /etc/pam.d/ssh ]; then
 338     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 339         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 340         /etc/pam.d/ssh || true
 341     echo -n " ssh"
 342 fi
 343
 344 # finished with PAM
 345 echo "."
 346
 347 ################################################################################
 348
 349 # fix old kernel-2.4-cn postrm
 350 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 351     echo "CN: Fixed old kernel-2.4-cn postrm."
 352     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<EOF
 353 #!/bin/sh
 354
 355 set -e
 356
 357 # be sure, be safe
 358 if [ "$1" != "remove" ]; then
 359   exit 0
 360 fi
 361
 362 # import CN-functions
 363 . /usr/share/carnet-tools/functions.sh
 364
 365 # remove us from limits.conf
 366 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 367
 368 # remove us from modules
 369 cp-update -r kernel-2.4-cn /etc/modules
 370 EOF
 371     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 372         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 373         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 374             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 375         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 376     fi
 377     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 378 fi
 379
 380 ################################################################################
 381
 382 # fix old kernel-cn postrm
 383 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 384     echo "CN: Fixed old kernel-cn postrm."
 385     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<EOF
 386 #!/bin/sh
 387
 388 set -e
 389
 390 # be sure, be safe
 391 if [ "$1" != "remove" ]; then
 392   exit 0
 393 fi
 394
 395 # import CN-functions
 396 . /usr/share/carnet-tools/functions.sh
 397
 398 # remove us from limits.conf
 399 cp-update -r kernel-cn /etc/security/limits.conf
 400
 401 # remove us from modules
 402 cp-update -r kernel-cn /etc/modules
 403 EOF
 404     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 405         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 406         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 407             /var/lib/dpkg/info/kernel-cn.postrm
 408         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 409     fi
 410     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 411 fi
 412
 413 ################################################################################
 414
 415 # dh_installdeb will replace this with shell code automatically
 416 # generated by other debhelper scripts.
 417
 418 #DEBHELPER#
 419
 420 exit 0