debian/exim4-config.postinst

   1 #!/bin/sh
   2
   3 set -e
   4 export exim4postinstisrunning=true
   5 . /usr/share/debconf/confmodule
   6
   7 if [ -n "$EX4DEBUG" ]; then
   8   echo "now debugging $0 $@"
   9   set -x
  10 fi
  11
  12 UE4CC="/etc/exim4/update-exim4.conf.conf"
  13
  14 db_version 2.0
  15
  16 get_value() {
  17     db_get $1
  18     code="$?"
  19     if [ "$code" -eq "0" ]; then
  20         :
  21     else
  22         echo "Error getting debconf answer $1: debconf code=$code" >&2
  23         exit $code
  24     fi
  25 }
  26
  27 write_header() {
  28         cat <<EOF > $UE4CC
  29 # $UE4CC
  30 #
  31 # Edit this file and /etc/mailname by hand and execute update-exim4.conf
  32 # yourself or use 'dpkg-reconfigure exim4-config'
  33 #
  34 # Please note that this is _not_ a dpkg-conffile and that automatic changes
  35 # to this file might happen. The code handling this will honor your local
  36 # changes, so this is usually fine, but will break local schemes that mess
  37 # around with multiple versions of the file.
  38 #
  39 # update-exim4.conf uses this file to determine variable values to generate
  40 # exim configuration macros for the configuration file.
  41 #
  42 # Most settings found in here do have corresponding questions in the
  43 # Debconf configuration, but not all of them.
  44 #
  45 # This is a Debian specific file
  46
  47 EOF
  48 }
  49
  50 addrootalias() {
  51 # remove leading and ending whitespace, shrink multiple whitespace, separate
  52 # entries with commas
  53 poma="$(echo "$1" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' -e 's/[[:space:];][[:space:]]*/,/g')"
  54 if [ "none" != "$poma" ] && [ "" != "$poma" ]; then
  55         echo "root: ${poma}" >> /etc/aliases
  56 fi
  57 }
  58
  59 #initialize /etc/aliases
  60 writealiases() {
  61 echo '# /etc/aliases' > /etc/aliases.tmp
  62 echo 'mailer-daemon: postmaster' >> /etc/aliases.tmp
  63 for i in postmaster nobody hostmaster usenet news webmaster www ftp abuse noc security ; do
  64         echo "${i}: root"
  65 done >> /etc/aliases.tmp
  66 mv /etc/aliases.tmp /etc/aliases
  67 }
  68
  69 alias stripwhitespace="sed -e 's/^[[:blank:]]*//' -e 's/[[:blank:]]*$//'"
  70
  71 # return success if md5sum matches file
  72 unmodified() {
  73         [ "$#" -eq 1 ] || return 1
  74         [ -f "$1" ] || return 1
  75         # first line, without the leading '# '.
  76         checksum_current="$(sed -n -e '1s/^# //' -e '1p;1q' "$1")"
  77
  78         # md5sum over the rest of the file.
  79         # some versions of md5sum produce
  80         # '68b329da9893e34099c7d8ad5cb9c940  -' others don't add the dash.
  81         # '68b329da9893e34099c7d8ad5cb9c940'
  82         checksum_new="$(sed -n '2,$p' "$1" | md5sum | cut -d\  -f1)"
  83
  84         if [ "${checksum_current}" = "${checksum_new}" ] ; then
  85                 return 0
  86         else
  87                 return 1
  88         fi
  89 }
  90
  91 convert_to_long ()
  92 {
  93         case "$1" in
  94         internet)
  95                 echo -n "internet site; mail is sent and received directly using SMTP"
  96                 ;;
  97         smarthost)
  98                 echo -n "mail sent by smarthost; received via SMTP or fetchmail"
  99                 ;;
 100         satellite)
 101                 echo -n "mail sent by smarthost; no local mail"
 102                 ;;
 103         local)
 104                 echo -n "local delivery only; not on a network"
 105                 ;;
 106         none)
 107                 echo -n "no configuration at this time"
 108                 ;;
 109         esac
 110 }
 111
 112 convert_to_short ()
 113 {
 114         case "$1" in
 115         "internet site; mail is sent and received directly using SMTP")
 116                 echo -n "internet"
 117                 ;;
 118         "mail sent by smarthost; received via SMTP or fetchmail")
 119                 echo -n "smarthost"
 120                 ;;
 121         "mail sent by smarthost; no local mail")
 122                 echo -n "satellite"
 123                 ;;
 124         "local delivery only; not on a network")
 125                 echo -n "local"
 126                 ;;
 127         "no configuration at this time")
 128                 echo -n "none"
 129                 ;;
 130         esac
 131 }
 132
 133 convert_transport_to_long ()
 134 {
 135         case "$1" in
 136         maildir_home)
 137                 echo -n "Maildir format in home directory"
 138                 ;;
 139         mail_spool)
 140                 echo -n "mbox format in /var/mail/"
 141                 ;;
 142         *)
 143                 echo -n "locally customized"
 144                 ;;
 145         esac
 146 }
 147 convert_transport_to_short ()
 148 {
 149         case "$1" in
 150         "Maildir format in home directory")
 151                 echo -n "maildir_home"
 152                 ;;
 153         "mbox format in /var/mail/")
 154                 echo -n "mail_spool"
 155                 ;;
 156         *)
 157                 echo -n "custom"
 158                 ;;
 159         esac
 160 }
 161
 162 # remove orphaned autogenerated conffile if unmodified. 4.20-2.
 163 if [ "$1" =  "configure" ] && \
 164         dpkg --compare-versions "$2" le-nl "4.20-1" ; then
 165
 166         for i in /etc/exim4/conf.d/rewrite/30_exim4-config_email-addresses \
 167                 /etc/exim4/conf.d/rewrite/35_exim4-config_masquerade ; do
 168                 if unmodified "$i"; then
 169                         echo "Removing orphaned unmodified configfile $i" 1>&2
 170                         rm "$i"
 171                 fi
 172         done
 173
 174 fi
 175 if [ "$1" =  "configure" ] && \
 176         dpkg --compare-versions "$2" le-nl "4.20-2" ; then
 177         if unmodified "/etc/exim4/conf.d/main/03_exim4-config_neverusers"; then
 178                 echo "Removing orphaned unmodified configfile /etc/exim4/conf.d/main/03_exim4-config_neverusers" 1>&2
 179                 rm "/etc/exim4/conf.d/main/03_exim4-config_neverusers"
 180         fi
 181 fi
 182
 183 #  Disable orphaned inetd-entries from exim (v3) caused by bugs #202670
 184 #  and #182206.
 185 if [ "$1" = "configure" ] &&\
 186         which update-inetd > /dev/null && which exim > /dev/null && \
 187         [ -f /etc/inetd.conf ] && \
 188         grep -E -q '^smtp[[:space:]]*stream[[:space:]]*tcp[[:space:]]*nowait[[:space:]]*mail[[:space:]]*/usr/sbin/+exim exim -bs' /etc/inetd.conf
 189 then
 190    update-inetd --comment-chars \#disabled\# \
 191       --pattern '/usr/sbin/exim exim -bs' --disable smtp
 192 fi
 193
 194 if [ "$1" = "configure" ] &&\
 195         ! getent passwd Debian-exim > /dev/null ; then
 196         echo 'Adding system-user for exim (v4)' 1>&2
 197         adduser --system --group --quiet --home /var/spool/exim4 \
 198                 --no-create-home --disabled-login --force-badname Debian-exim
 199 fi
 200
 201 # fix permissions of /etc/exim4/passwd.client
 202 if [ "$1" = "configure" ] ; then
 203         if ! dpkg-statoverride --list /etc/exim4/passwd.client > /dev/null 2>&1
 204         then
 205                 dpkg-statoverride --update --add root Debian-exim 0640 \
 206                         /etc/exim4/passwd.client
 207         fi
 208
 209         if dpkg --compare-versions "$2" le "4.30-1" ; then
 210                 find /etc/exim4 -user mail \( -type f -or -type d \) -print |\
 211                 while read i ;
 212                 do
 213                         if ! dpkg-statoverride --list "$i" > /dev/null ; then
 214                                 chown Debian-exim "$i"
 215                         fi
 216                 done
 217                 find /etc/exim4 -group mail \( -type f -or -type d \) -print |\
 218                 while read i ;
 219                 do
 220                         if ! dpkg-statoverride --list "$i" > /dev/null ; then
 221                                 chgrp Debian-exim "$i"
 222                         fi
 223                 done
 224         fi
 225 fi
 226
 227 case "$1" in
 228   configure)
 229         # Configure Exim##############################
 230         ##############################################
 231         # valid config directives
 232         dc_directives="dc_eximconfig_configtype dc_other_hostnames dc_local_interfaces dc_readhost dc_relay_domains dc_minimaldns dc_relay_nets dc_smarthost CFILEMODE dc_use_split_config dc_hide_mailname dc_mailname_in_oh dc_localdelivery"
 233         # Generate config-file if it does not yet exist
 234         if [ ! -e $UE4CC ] ; then
 235                 write_header
 236                 for variable in ${dc_directives} ; do
 237                         echo "${variable}="
 238                 done >> $UE4CC
 239         fi
 240
 241         # If this is a fresh installation generate dummy files, which
 242         # will be overwritten by update-exim4.conf
 243         # if we add stuff later, we have to compare versions:
 244         # if [ -z "$2" ] || [ "$2" = "<unknown>" ] || dpkg --compare-versions "$2" lt "4.14-0.4" ; then
 245         #       for file in /etc/exim4/conf.d/main/03_exim4-config_neverusers ;do
 246         #               if [ ! -f "$file" ] ; then
 247         #                       echo "# d41d8cd98f00b204e9800998ecf8427e" > "$file"
 248         #                       chmod 644 "$file"
 249         #               fi
 250         #       done
 251         #fi
 252
 253         # generate defaultfile
 254         update-exim4defaults --init
 255
 256         # source $UE4CC - needed for not
 257         # debconf-managed values in there.
 258         . $UE4CC
 259
 260         # Substitute values from debconf db
 261         db_get exim4/dc_eximconfig_configtype || true
 262         dc_eximconfig_configtype="$(convert_to_short "$RET")"
 263         db_get exim4/dc_local_interfaces || true
 264         dc_local_interfaces="$(printf '%s\n' "$RET" | stripwhitespace)"
 265         db_get exim4/dc_other_hostnames || true
 266         dc_other_hostnames="$(printf '%s\n' "$RET" | stripwhitespace)"
 267         db_get exim4/dc_readhost || true
 268         dc_readhost="$(printf '%s\n' "$RET" | stripwhitespace)"
 269         db_get exim4/dc_relay_domains || true
 270         dc_relay_domains="$(printf '%s\n' "$RET" | stripwhitespace)"
 271         db_get exim4/dc_relay_nets || true
 272         dc_relay_nets="$(printf '%s\n' "$RET" | stripwhitespace)"
 273         db_get exim4/dc_smarthost || true
 274         dc_smarthost="$(printf '%s\n' "$RET" | stripwhitespace)"
 275         db_get exim4/dc_minimaldns || true
 276         dc_minimaldns="$(printf '%s\n' "$RET" | stripwhitespace)"
 277         db_get exim4/mailname || true
 278         mailname="$(printf '%s\n' "$RET" | stripwhitespace)"
 279         db_get exim4/use_split_config || true
 280         dc_use_split_config="$(printf '%s\n' "$RET" | stripwhitespace)"
 281         db_get exim4/hide_mailname || true
 282         dc_hide_mailname="$(printf '%s\n' "$RET" | stripwhitespace)"
 283
 284         # overwrite dc_localdelivery with value stored in debconf db unless
 285         # it is set to something else than maildir_home or mail_spool.
 286         if [ "${dc_localdelivery}" = "" ] ||
 287                 [ "$(convert_transport_to_long ${dc_localdelivery})" != "locally customized" ] ; then
 288                 db_get exim4/dc_localdelivery || true
 289                 dc_localdelivery="$(convert_transport_to_short "$RET")"
 290         fi
 291
 292         if [ -r /var/lib/exim4/addmailname2oh ] ; then
 293         # .config added mailname to other hostnames, 2nd run of config script
 294         # will have overwritten this change in debcond-db, therefore we need
 295         # to store this externally, too.
 296                 . /var/lib/exim4/addmailname2oh
 297                 rm -f /var/lib/exim4/addmailname2oh
 298         fi
 299         db_fget "exim4/dc_other_hostnames" mailname || true
 300         dc_mailname_in_oh="$RET"
 301
 302         [ "${CFILEMODE}" = "" ] && CFILEMODE=644
 303
 304         db_get exim4/dc_postmaster
 305         dc_postmaster="$(printf '%s\n' "$RET" | stripwhitespace)"
 306
 307         if [ ! -e /etc/aliases ] ; then
 308                 writealiases
 309         fi
 310         if ! grep -q '^root:[[:space:]]*[[:alnum:]]' /etc/aliases && \
 311                 [ "${dc_postmaster}" != "none" ]; then
 312                 addrootalias "${dc_postmaster}"
 313         fi
 314
 315         ### write configuration to files #
 316         # add missing items
 317         for variable in ${dc_directives} ; do
 318                 if ! grep -E -q "^[[:space:]]*${variable}=" $UE4CC ; then
 319                         echo "${variable}=''" >> $UE4CC
 320                 fi
 321         done
 322         # insert new values, remove outdated ones.
 323
 324         # Use environment variables to communicate data to awk, to
 325         # avoid shell (or awk or sed) string expansion which may
 326         # expand escape sequences.  Note that the variables named in
 327         # ${dc_directives} (but not the variable names themselves) may
 328         # contain escaped characters like \N.
 329
 330         export dc_directives ${dc_directives}
 331
 332         awk '
 333             BEGIN {
 334                 split( ENVIRON["dc_directives"], directives, "[ \t]" );
 335             }
 336             {
 337                 written = 0;
 338                 for ( i in directives )
 339                    {
 340                        regex = "^[ \t]*" directives[i] "=";
 341                        if ( ( $0 ~ regex ) && ( ! written ) )
 342                            {
 343                                # Add single quotes (\0x27) around the value.
 344                                print directives[i] "=\x27" ENVIRON[directives[i]] "\x27";
 345                                written = 1;
 346                                break;
 347                            }
 348                    }
 349                    if ( ! written )
 350                        print $0;
 351             }' < ${UE4CC} > ${UE4CC}.tmp
 352
 353         mv ${UE4CC}.tmp $UE4CC
 354
 355         echo $mailname > /etc/mailname
 356         ### configuration files written ##
 357
 358
 359         if [ "${dc_eximconfig_configtype}" != "none" ]; then
 360                 update-exim4.conf
 361         fi
 362         # If dpkg-reconfigure was used implement the changes by restarting
 363         # the daemon.
 364         if [ "${DEBCONF_RECONFIGURE}" = "1" ] ; then
 365                 if [ -x /etc/init.d/exim4 ]; then
 366                         # use restart instead of reload, as changing listening
 367                         # interfaces cannot be done with HUP.
 368                         db_stop
 369                         if [ -n "$EX4DEBUG" ]; then
 370                           netstat -tulpen
 371                           ls -al /run/exim4/
 372                           cat /run/exim4/exim.pid
 373                           pidof exim4
 374                         fi
 375                         if [ "$dc_eximconfig_configtype" = "none" ]; then
 376                                 # we may have broken config here, ignore errors
 377                                 invoke-rc.d exim4 restart || true
 378                         else
 379                                 # we must have working config here, honor errors
 380                                 invoke-rc.d exim4 restart
 381                         fi
 382                         if [ -n "$EX4DEBUG" ]; then
 383                           netstat -tulpen
 384                           ls -al /run/exim4/
 385                           cat /run/exim4/exim.pid
 386                           pidof exim4
 387                           if pidof exim4; then
 388                             echo >&2 "WARN: There are some exim4 processes still running after stopping exim"
 389                           fi
 390                         fi
 391                 fi
 392         fi
 393
 394         ;;
 395 esac
 396
 397 # remove orphaned conffile if unmodified. 4.20-2.
 398 if [ "$1" =  "configure" ] && \
 399         dpkg --compare-versions "$2" le-nl "4.20-1" && \
 400         [ -e /etc/exim4/email-addresses ] && \
 401         [ "$(md5sum /etc/exim4/email-addresses | cut -d\  -f1)" = "6bea09fbb18e4676012105fa5fc726c6" ]
 402 then
 403         echo "Removing orphaned unmodified configfile /etc/exim4/email-addresses" 1>&2
 404         rm /etc/exim4/email-addresses
 405 fi
 406
 407
 408 #DEBHELPER#