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