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