debian/nbd-server.postinst

   1 #! /bin/bash
   2 # postinst script for nbd
   3 #
   4 # see: dh_installdeb(1)
   5
   6 set -e
   7
   8 . /usr/share/debconf/confmodule
   9
  10 # Quotes each argument for shell expression inclusion, to prevent
  11 # interpretation of special characters.
  12 function shell_quote () {
  13        local first=true
  14        while [ "$#" -gt 0 ]; do
  15                if [ ! "$first" ]; then
  16                        echo -n ' '
  17                fi
  18                # sed expression transforms instances of ' to '\''
  19                echo -n "'$(echo "$1" | sed -e "s/'/'\\\\''/g")'"
  20                first=
  21                shift
  22        done
  23 }
  24
  25 # Convert an old-style configuration file to a new-style one
  26 function convert_config () {
  27         [ -f /etc/nbd-server.oldconf ] && . /etc/nbd-server.oldconf
  28         [ -f /etc/nbd-server ] && . /etc/nbd-server
  29         TMPFILE=$(mktemp /tmp/nbd-server.XXXXXX)
  30         if [ "$AUTO_GEN" = "n" ]
  31         then
  32                 db_input critical nbd-server/autogen
  33                 db_go
  34                 exit 1
  35         fi
  36         cat /usr/share/nbd-server/nbd-server.conf.tmpl > $TMPFILE
  37         while [ ! -z ${NBD_FILE[$i]} ]
  38         do
  39                 nbd-server -o "export-$i" ${NBD_PORT[$i]} ${NBD_FILE[$i]} ${NBD_SERVER_OPTS[$i]} >> $TMPFILE
  40                 i=$(( $i + 1 ))
  41         done
  42 }
  43
  44 # summary of how this script can be called:
  45 #        * <postinst> `configure' <most-recently-configured-version>
  46 #        * <old-postinst> `abort-upgrade' <new version>
  47 #        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
  48 #          <new-version>
  49 #        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
  50 #          <failed-install-package> <version> `removing'
  51 #          <conflicting-package> <version>
  52 # for details, see /usr/share/doc/packaging-manual/
  53 #
  54 # quoting from the policy:
  55 #     Any necessary prompting should almost always be confined to the
  56 #     post-installation script, and should be protected with a conditional
  57 #     so that unnecessary prompting doesn't happen if a package's
  58 #     installation fails and the `postinst' is called with `abort-upgrade',
  59 #     `abort-remove' or `abort-deconfigure'.
  60
  61 case "$1" in
  62     configure)
  63         if [ -f /etc/nbd-server -o -f /etc/nbd-server.oldconf ]
  64         then
  65             db_get nbd-server/convert
  66             if [ "$RET" = "true" ]
  67             then
  68                 convert_config;
  69                 exit 0;
  70             fi
  71         fi
  72         db_get nbd-server/number
  73         NUMBER=${RET:-0}
  74         umask 066
  75         if [ "$NUMBER" -gt 0 ]
  76         then
  77             TMPFILE=`mktemp /tmp/nbd-server.XXXXXX`
  78             cat /usr/share/nbd-server/nbd-server.conf.tmpl > $TMPFILE
  79             db_get nbd-server/useports
  80             DOPORTS="$RET"
  81             if [ "$DOPORTS" ]
  82             then
  83               echo "    oldstyle = true" >> $TMPFILE
  84             fi
  85             for i in $(seq 0 $(( $NUMBER - 1 )) )
  86             do
  87               # stay downward compatible
  88               if [ "$i" -eq 0 ]
  89               then
  90                   unset i
  91               fi
  92               db_get nbd-server/port$i
  93               PORT=$RET
  94               db_get nbd-server/name$i
  95               NAME=$RET
  96               db_get nbd-server/filename$i
  97               FN=$RET
  98               (   echo "[$NAME]"
  99                   echo "        exportname = $FN"
 100               ) >> $TMPFILE
 101               if [ $DOPORTS ]
 102               then
 103                   echo "        port = $PORT" >> $TMPFILE
 104               fi
 105             done
 106             ucf --debconf-ok $TMPFILE /etc/nbd-server/config
 107         fi
 108         if ! id nbd >/dev/null 2>&1; then
 109             adduser --system --group --home /etc/nbd-server --no-create-home nbd
 110         fi
 111         ;;
 112
 113     abort-upgrade|abort-remove|abort-deconfigure)
 114
 115         ;;
 116
 117     *)
 118         echo "postinst called with unknown argument \`$1'">&2
 119         exit 0
 120         ;;
 121 esac
 122
 123 db_stop
 124
 125 # dh_installdeb will replace this with shell code automatically
 126 # generated by other debhelper scripts.
 127
 128 #DEBHELPER#
 129
 130 exit 0