debian/postinst

   1 #!/bin/sh
   2 # postinst script for spamassassin-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 ################################################################################
  34
  35 # starting up backup
  36 echo -n "CN: Backed up to /var/backups:"
  37
  38 # backup lilo.conf
  39 if [ -e /etc/lilo.conf ]; then
  40   cp_backup_conffile /etc/lilo.conf
  41   echo -n " lilo.conf"
  42 fi
  43
  44 # backup old kernel params
  45 if [ -e /etc/sysctl.conf ]; then
  46   cp_backup_conffile /etc/sysctl.conf
  47   echo -n " sysctl.conf"
  48 fi
  49
  50 # backup old kernel params
  51 if [ -e /etc/kernel-img.conf ]; then
  52   cp_backup_conffile /etc/kernel-img.conf
  53   echo -n " kernel-img.conf"
  54 fi
  55
  56 # finished
  57 echo "."
  58
  59 ################################################################################
  60
  61 # intro msg
  62 echo -n "CN: Configuring system (this will take a while):"
  63
  64 # generate kernel-img.conf
  65 if [ ! -e /etc/kernel-img.conf ]; then
  66     touch /etc/kernel-img.conf
  67 fi
  68
  69 # update postinst_hook for grub
  70 if grep -q postinst_hook /etc/kernel-img.conf; then
  71     cp_check_and_sed '^postinst_hook' \
  72       's;^postinst_hook[[:blank:]]*=.*;postinst_hook = /usr/sbin/update-grub;g' \
  73           /etc/kernel-img.conf || true
  74 else
  75     echo "postinst_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
  76 fi
  77
  78 # update postrm_hook for grub
  79 if grep -q postrm_hook /etc/kernel-img.conf; then
  80     cp_check_and_sed '^postrm_hook' \
  81       's;^postrm_hook[[:blank:]]*=.*;postrm_hook = /usr/sbin/update-grub;g' \
  82           /etc/kernel-img.conf || true
  83 else
  84     echo "postrm_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
  85 fi
  86
  87 # enable initrd
  88 if grep -q do_initrd /etc/kernel-img.conf; then
  89     cp_check_and_sed '^do_initrd' \
  90       's/^do_initrd[[:blank:]]*=.*/do_initrd = yes/g' \
  91           /etc/kernel-img.conf || true
  92 else
  93     echo "do_initrd = yes" >> /etc/kernel-img.conf
  94 fi
  95
  96 echo -n " kernel-img.conf"
  97
  98 # generate initial grub loaders
  99 if [ ! -d /boot/grub ]; then
 100     mkdir -p /boot/grub
 101     if [ -d /usr/lib/grub/i386-pc ]; then
 102         cp -a /usr/lib/grub/i386-pc/* /boot/grub
 103     fi
 104 fi
 105 echo -n " grub1"
 106
 107 # create/update grub configuration
 108 if [ -e /boot/grub/menu.lst ]; then
 109     # is there uncompatibile grub conf present?
 110     if ! grep -q 'AUTOMAGIC KERNELS LIST' /boot/grub/menu.lst; then
 111         mv -f /boot/grub/menu.lst /boot/grub/menu.lst.old
 112     fi
 113 fi
 114 if [ ! -e /boot/grub/menu.lst ]; then
 115     yes | /usr/sbin/update-grub >/dev/null 2>&1 || true
 116 else
 117     /usr/sbin/update-grub >/dev/null 2>&1 || true
 118 fi
 119 echo -n " grub2"
 120
 121 # workaround grsec
 122 if [ -x /sbin/chpax ]; then
 123     if [ -x /usr/sbin/grub ]; then
 124         chpax -spmrx /usr/sbin/grub || true
 125     fi
 126     if [ -x /usr/sbin/grub-probe ]; then
 127         chpax -spmrx /usr/sbin/grub-probe || true
 128     fi
 129 fi
 130 echo -n " grub3"
 131
 132 # workaround execshield
 133 SHIELD=$(sysctl -e -n kernel.exec-shield)
 134 if [ ! -z "$SHIELD" ]; then
 135     sysctl -w -e kernel.exec-shield=0 >/dev/null 2>&1
 136 fi
 137
 138 # install grub loader
 139 if ! grub-install --no-floppy '(hd0)' >/dev/null 2>&1; then
 140     echo "."
 141     echo "CN: FATAL ERROR running grub-install!"
 142     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 143     exit 1
 144 fi
 145 echo -n " grub4"
 146
 147 # restore execshield state
 148 if [ ! -z "$SHIELD" ]; then
 149     sysctl -w -e "kernel.exec-shield=$SHIELD" >/dev/null 2>&1
 150 fi
 151
 152 # disable lilo
 153 if [ -e /etc/lilo.conf ]; then
 154     mv -f /etc/lilo.conf /etc/lilo.conf.old
 155 fi
 156 echo -n " lilo"
 157
 158 # mdadm
 159 if [ -x /usr/share/mdadm/mkconf ]; then
 160     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 161         touch /etc/mdadm/mdadm.conf
 162     fi
 163
 164     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 165     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 166         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 167     fi
 168     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 169         /var/lib/mdadm/CONF-UNCHECKED
 170     echo -n " mdadm"
 171 fi
 172
 173 # update initramfs accordingly
 174 update-initramfs -u -k all >/dev/null 2>&1 || true
 175 echo -n " initramfs"
 176
 177 # finished
 178 echo "."
 179
 180 ################################################################################
 181
 182 # rest of configuration...
 183 echo -n "CN: Modifying the neccessary system files:"
 184
 185 # remove group 99
 186 if getent group proc >/dev/null 2>&1; then
 187     groupdel proc >/dev/null 2>&1
 188 fi
 189 echo -n " proc"
 190
 191 # remove oidentd from oident group
 192 if getent group oident >/dev/null 2>&1; then
 193     # sarge default
 194     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 195       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 196           /etc/default/oidentd || true
 197
 198     # old kernel-2.6-cn default
 199     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 200       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 201           /etc/default/oidentd || true
 202
 203     echo -n " oidentd"
 204 fi
 205
 206 # default kernel parameters
 207 rm -f /etc/sysctl.conf.$$
 208 cat > /etc/sysctl.conf.$$ <<EOF
 209 kernel.exec-shield=3
 210 kernel.maps_protect=1
 211 net.core.rmem_default=1048576
 212 net.core.wmem_default=1048576
 213 net.ipv4.conf.all.accept_redirects=0
 214 net.ipv4.conf.all.accept_source_route=0
 215 net.ipv4.conf.all.log_martians=1
 216 net.ipv4.conf.all.rp_filter=1
 217 net.ipv4.conf.all.secure_redirects=1
 218 net.ipv4.conf.all.send_redirects=0
 219 net.ipv4.icmp_echo_ignore_broadcasts=1
 220 net.ipv4.icmp_ignore_bogus_error_responses=1
 221 net.ipv4.ip_forward=0
 222 net.ipv4.ip_local_port_range=10000 65000
 223 net.ipv4.tcp_congestion_control=cubic
 224 net.ipv4.tcp_ecn=0
 225 net.ipv4.tcp_max_syn_backlog=8192
 226 net.ipv4.tcp_retries1=2
 227 net.ipv4.tcp_rfc1337=1
 228 net.ipv4.tcp_syncookies=1
 229 vm.mmap_min_addr=65536
 230 EOF
 231
 232 # old kernel params
 233 if [ -e /etc/sysctl.conf ]; then
 234   #cat /etc/sysctl.conf >> /etc/sysctl.conf.$$
 235   #ignore some of 2.4 stuff
 236   egrep -v 'net\.core\.(r|w)mem_max|net\.ipv4\.tcp_(r|w)mem|vm\.bdflush|net\.ipv4\.ip_local_port_range|kernel\.rtsig-max|net\.ipv4\.tcp_syncookies' \
 237     /etc/sysctl.conf >> /etc/sysctl.conf.$$
 238 fi
 239
 240 # add sysctl.conf Debian headers
 241 rm -f /etc/sysctl.conf-head
 242 cat > /etc/sysctl.conf-head <<EOF
 243 #
 244 # /etc/sysctl.conf - Configuration file for setting system variables
 245 # See sysctl.conf (5) for information.
 246 #
 247 EOF
 248
 249 # merge old and new in one conf, primarily respecting old
 250 script='
 251 my %confhash = ();
 252 my ($key, $value);
 253 while (<>)
 254 {
 255   chomp();
 256   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 257   {
 258     my ($key, $value) = ($1, $2);
 259     $key =~ s/\//./go;
 260     $confhash{$key} = $value;
 261   }
 262 }
 263 for (sort { $a cmp $b } keys %confhash)
 264 {
 265   print $_, "=", $confhash{$_}, "\n";
 266 }
 267 '
 268 rm -f /etc/sysctl.conf-new
 269 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 270 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 271 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 272
 273 # finished with merging, move into sysctl.conf
 274 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 275 echo -n " sysctl.conf"
 276
 277 # finished with basic kernel-2.6-cn stuff
 278 echo "."
 279
 280 ################################################################################
 281
 282 # intro
 283 echo -n "CN: Setting up PAM configurations:"
 284
 285 # update pam_limits accordingly
 286 if [ -e /etc/security/limits.conf ]; then
 287   rm -f /etc/security/limits.conf.$$
 288   cp /etc/security/limits.conf /etc/security/limits.conf.$$
 289   cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<EOF
 290 *               soft    core            0
 291 *               hard    nofile          4096
 292 *               soft    nofile          4096
 293 EOF
 294   cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 295   echo -n " limits"
 296 fi
 297
 298 # check pam.d/login
 299 if [ -e /etc/pam.d/login ]; then
 300   cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 301     's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 302     /etc/pam.d/login || true
 303   echo -n " login"
 304 fi
 305
 306 # check pam.d/ssh
 307 if [ -e /etc/pam.d/ssh ]; then
 308   cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 309     's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 310     /etc/pam.d/ssh || true
 311   echo -n " ssh"
 312 fi
 313
 314 # finished with PAM
 315 echo "."
 316
 317 ################################################################################
 318
 319 # remove obsolete links
 320 rm -f /boot/vmlinuz /boot/vmlinuz.old /boot/vmlinuz.old2 \
 321   /boot/vmlinuz.plain /vmlinuz /vmlinuz.old /boot/vmlinuz.plain
 322 echo "CN: Removed old symlinks in / and /boot."
 323
 324 ################################################################################
 325
 326 # fix old kernel-2.4-cn postrm
 327 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 328     echo "CN: Fixed old kernel-2.4-cn postrm."
 329     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<EOF
 330 #!/bin/sh
 331
 332 set -e
 333
 334 # be sure, be safe
 335 if [ "$1" != "remove" ]; then
 336   exit 0
 337 fi
 338
 339 # import CN-functions
 340 . /usr/share/carnet-tools/functions.sh
 341
 342 # remove us from limits.conf
 343 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 344
 345 # remove us from modules
 346 cp-update -r kernel-2.4-cn /etc/modules
 347 EOF
 348     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 349         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 350         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 351             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 352         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 353     fi
 354     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 355 fi
 356
 357 ################################################################################
 358
 359 # fix old kernel-cn postrm
 360 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 361     echo "CN: Fixed old kernel-cn postrm."
 362     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<EOF
 363 #!/bin/sh
 364
 365 set -e
 366
 367 # be sure, be safe
 368 if [ "$1" != "remove" ]; then
 369   exit 0
 370 fi
 371
 372 # import CN-functions
 373 . /usr/share/carnet-tools/functions.sh
 374
 375 # remove us from limits.conf
 376 cp-update -r kernel-cn /etc/security/limits.conf
 377
 378 # remove us from modules
 379 cp-update -r kernel-cn /etc/modules
 380 EOF
 381     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 382         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 383         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 384             /var/lib/dpkg/info/kernel-cn.postrm
 385         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 386     fi
 387     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 388 fi
 389
 390 ################################################################################
 391
 392 # dh_installdeb will replace this with shell code automatically
 393 # generated by other debhelper scripts.
 394
 395 #DEBHELPER#
 396
 397 exit 0