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