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