debian/postinst

   1 #!/bin/sh
   2
   3 set -e
   4
   5 [ "$1" = "configure" ] || exit 0
   6 [ "$DEBIAN_SCRIPT_DEBUG" ] && set -vx
   7
   8 # Load CARNet Tools
   9 . /usr/share/carnet-tools/functions.sh
  10
  11 PKG=xinetd-cn
  12 CONF=/etc/xinetd.conf
  13 INETDCONF=/etc/inetd.conf
  14 DEFAULT=/etc/default/xinetd
  15 BACKUPDIR=/var/backups/xinetd-cn
  16 XCONV_TOOL=/usr/sbin/xconv.pl
  17
  18 need_restart=0
  19 temp_files=
  20 xinetd_conf_did=0
  21
  22 # cleanup()
  23 #
  24 #   Cleanup all temp files.
  25 #
  26 cleanup () {
  27     local item
  28
  29     if [ -n "$temp_files" ]; then
  30         for item in $temp_files; do
  31             if [ -e "$item" ]; then
  32                 rm -f $item
  33             fi
  34         done
  35     fi
  36 }
  37
  38 # backup_and_disable_service()
  39 #
  40 #   Backup and disable service with invalid configuration.
  41 #   Arguments:  service, services_file
  42 #
  43 backup_and_disable_service () {
  44     local serv servfile out
  45     serv="$1"
  46     servfile="$2"
  47
  48     if cp_backup_conffile -r -d $BACKUPDIR -p /etc/xinetd.d/$servfile; then
  49         cp_echo "CN: Old /etc/xinetd.d/$servfile saved as $BACKUPDIR/`basename /etc/xinetd.d/$servfile`.bak."
  50     fi
  51
  52     cp_echo "CN: Disabling service '$serv' in configuration file /etc/xinetd.d/$servfile."
  53
  54     out=`mktemp /etc/xinetd.d/$servfile.tmp.XXXXXX`
  55     temp_files="$temp_files $out"
  56
  57     sed -r "/^[[:space:]]*service[[:space:]]+$serv[[:space:]]*$/,/^}/ s/^(.*)/#\1/" \
  58         /etc/xinetd.d/$servfile > $out
  59     rm -f /etc/xinetd.d/$servfile
  60     mv "$out" "/etc/xinetd.d/$servfile"
  61     chmod 644 "/etc/xinetd.d/$servfile"
  62 }
  63
  64 # Set trap for deleting all temp files.
  65 #
  66 trap cleanup 0 1 2 15
  67
  68 # First, we do backup (inetd, xinetd)
  69 #
  70 if [ -f "$INETDCONF" ]; then
  71     if cp_backup_conffile -r -d $BACKUPDIR -p $INETDCONF; then
  72         cp_echo "CN: Old $INETDCONF saved as $BACKUPDIR/`basename $INETDCONF`.bak."
  73     fi
  74 fi
  75 if [ -f "$CONF" ]; then
  76     if cp_backup_conffile -r -d $BACKUPDIR -p $CONF; then
  77         cp_echo "CN: Old $CONF saved as $BACKUPDIR/`basename $CONF`.bak."
  78     fi
  79 fi
  80
  81 CONFTMP=`mktemp $CONF.tmp.XXXXXX`
  82 temp_files="$CONFTMP"
  83
  84 if [ -f "$INETDCONF" ]; then
  85     # Convert inetd.conf to temporary xinetd.conf file using xconv.pl tool
  86     egrep -v "^#<off>#" $INETDCONF | $XCONV_TOOL > $CONFTMP || true
  87 fi
  88
  89 # Parse /etc/xinetd.conf file and convert services' configuration to
  90 # separated configurations in /etc/xinetd.d/ directory
  91 #
  92 conffile_list="$CONFTMP"
  93 if [ -f "$CONF" ]; then
  94     if egrep -q "^[[:space:]]*service[[:space:]]+" "$CONF"; then
  95         conffile_list="$CONF $conffile_list"
  96         xinetd_conf_did=1
  97     fi
  98 fi
  99 services_list="`sed -nr 's/^[[:space:]]*service[[:space:]]+//p' $conffile_list | uniq`"
 100
 101 if [ -n "$services_list" ]; then
 102
 103     for service in $services_list; do
 104
 105         if [ -f "/etc/xinetd.d/$service" ]; then
 106             if cp_backup_conffile -r -d $BACKUPDIR -p /etc/xinetd.d/$service; then
 107                 cp_echo "CN: Old /etc/xinetd.d/$service saved as $BACKUPDIR/`basename /etc/xinetd.d/$service`.bak."
 108             fi
 109             rm -f /etc/xinetd.d/$service
 110         fi
 111
 112         touch /etc/xinetd.d/$service || true
 113         # cat "$CONF" "$CONFTMP" | sed -n "/^service $service/,/^}/p" | cp-update "$PKG" "/etc/xinetd.d/$service"
 114         sed -rn "/^[[:space:]]*service[[:space:]]+$service[[:space:]]*$/,/^}/p" \
 115             $conffile_list >> "/etc/xinetd.d/$service"
 116
 117         need_restart=1
 118     done
 119
 120     if egrep -q "^[[:space:]]*service[[:space:]]+" "$CONFTMP"; then
 121         cp_echo "CN: All services were converted from $INETDCONF file to separated"
 122         cp_echo "CN: configuration files located in /etc/xinetd.d/ directory."
 123     fi
 124
 125     if [ $xinetd_conf_did -eq 1 ]; then
 126         cp_echo "CN: All services were converted from $CONF file to separated"
 127         cp_echo "CN: configuration files located in /etc/xinetd.d/ directory."
 128     fi
 129 fi
 130
 131 rm -f $CONFTMP
 132
 133 # Configuration file /etc/xinetd.conf does not exist?
 134 #
 135 if [ ! -f "$CONF" ]; then
 136     touch "$CONF"
 137 fi
 138 CONF_CONTENT=
 139
 140 # Remove services from /etc/xinetd.conf file
 141 #
 142 cp_check_and_sed "^[[:space:]]*service[[:space:]]+" \
 143     "/^[[:space:]]*service[[:space:]]/,/^}/d" \
 144     "$CONF" && need_restart=1 || true
 145
 146 # Check if there is no defaults block in /etc/xinetd.conf
 147 #
 148 if ! egrep -q '^defaults' "$CONF"; then
 149     cp_echo "CN: Adding defaults block to $CONF"
 150     CONF_CONTENT="defaults
 151 {
 152
 153 }"
 154 fi
 155
 156 # Check if /etc/xinetd.d/ directory is included or not
 157 #
 158 if ! egrep -q '^includedir /etc/xinetd.d' "$CONF"; then
 159     cp_echo "CN: Adding \"includedir /etc/xinetd.d\" line to $CONF"
 160     CONF_CONTENT="$CONF_CONTENT
 161 includedir /etc/xinetd.d"
 162 fi
 163
 164 if [ -n "$CONF_CONTENT" ]; then
 165     echo "$CONF_CONTENT" | cp-update -m "$PKG" "$CONF"
 166     need_restart=1
 167 fi
 168
 169 # Validate services' configuration.
 170 #
 171 services_file_list="`ls -1 /etc/xinetd.d/`"
 172 if [ -n "$services_file_list" ]; then
 173
 174     for services_file in $services_file_list; do
 175         # Get services list from $services_file
 176         services_list="`sed -rn "s/^[[:space:]]*service[[:space:]]+(.*)[[:space:]]*$/\1/p" /etc/xinetd.d/$services_file`"
 177
 178         if [ -n "$services_list" ]; then
 179
 180             for service in $services_list; do
 181                 service_disable=0
 182                 service_block="`sed -rn "/^[[:space:]]*service[[:space:]]+$service[[:space:]]*$/,/^}/p" /etc/xinetd.d/$services_file`"
 183
 184                 # Check service's user
 185                 service_user="`echo "$service_block" | sed -nr "s/^[[:space:]]*user[[:space:]]*=[[:space:]]*(.*)[[:space:]]*$/\1/p"`"
 186                 if [ -n "$service_user" ]; then
 187                     for service_user_x in $service_user; do
 188                         service_user_chk="`getent passwd $service_user_x`" || true
 189                         if [ -z "$service_user_chk" ]; then
 190                             cp_echo "CN: Error in /etc/xinetd.d/$services_file for service '$service' - user '$service_user_x' does not exist."
 191                             service_disable=1
 192                             break
 193                         fi
 194                     done
 195                 fi
 196
 197                 # Check service's group
 198                 service_group="`echo "$service_block" | sed -nr "s/^[[:space:]]*group[[:space:]]*=[[:space:]]*(.*)[[:space:]]*$/\1/p"`"
 199                 if [ -n "$service_group" ]; then
 200                     for service_group_x in $service_group; do
 201                         service_group_chk="`getent passwd $service_group_x`" || true
 202                         if [ -z "$service_group_chk" ]; then
 203                             cp_echo "CN: Error in /etc/xinetd.d/$services_file for service '$service' - group '$service_group_x' does not exist."
 204                             service_disable=1
 205                             break
 206                         fi
 207                     done
 208                 fi
 209
 210                 # Check service's binary
 211                 service_server="`echo "$service_block" | sed -nr "s/^[[:space:]]*server[[:space:]]*=[[:space:]]*(.*)[[:space:]]*$/\1/p"`"
 212                 if [ -n "$service_server" ]; then
 213                     for service_server_x in $service_server; do
 214                         if [ ! -x "$service_server_x" ]; then
 215                             cp_echo "CN: Error in /etc/xinetd.d/$services_file for service '$service' - server '$service_server_x' does not exist."
 216                             service_disable=1
 217                             break
 218                         fi
 219                     done
 220                 fi
 221
 222                 if [ $service_disable -eq 1 ]; then
 223                     backup_and_disable_service "$service" "$services_file"
 224                     need_restart=1
 225                 fi
 226             done
 227         fi
 228     done
 229 fi
 230
 231 # Remove -inetd_compat option and set INETD_COMPAT to 'No' in /etc/default/xinetd
 232 #
 233 if [ -f "$DEFAULT" ]; then
 234     # File exists, set INETD_COMPAT to 'No'
 235     cp_check_and_sed "^[[:space:]]*INETD_COMPAT.*[Yy][Ee][Ss]" \
 236         "s/^[[:space:]]*INETD_COMPAT.*[Yy][Ee][Ss]/INETD_COMPAT=No/g" \
 237         "$DEFAULT" && need_restart=1 || true
 238
 239     # File exists, remove -inetd_compat option
 240     cp_check_and_sed "^[[:space:]]*XINETD_OPTS.*\-inetd_compat" \
 241         "s/\-inetd_compat//g" \
 242         "$DEFAULT" && need_restart=1 || true
 243
 244     # No INETD_COMPAT line?
 245     if ! egrep -q '^[[:space:]]*INETD_COMPAT' "$DEFAULT"; then
 246         echo 'INETD_COMPAT=No' | cp-update -m "$PKG" "$DEFAULT"
 247         cp_echo "CN: Added 'INETD_COMPAT=No' to $DEFAULT."
 248         need_restart=1
 249     fi
 250
 251     # Just in case there is no active XINETD_OPTS line
 252     if ! egrep -q '^[[:space:]]*XINETD_OPTS' "$DEFAULT"; then
 253         echo 'XINETD_OPTS="-stayalive"' | cp-update -m "$PKG" "$DEFAULT"
 254         cp_echo "CN: Added -stayalive option to $DEFAULT."
 255         need_restart=1
 256     fi
 257 else
 258     # File wasn't there at all?
 259     touch "$DEFAULT"
 260     cp-update "$PKG" "$DEFAULT" <<EOF
 261 INETD_COMPAT=No
 262 XINETD_OPTS="-stayalive"
 263 EOF
 264     cp_echo "CN: Created $DEFAULT file with -stayalive enabled and -inetd_compat disabled."
 265     need_restart=1
 266 fi
 267
 268 # Restart xinetd if needed
 269 #
 270 if [ $need_restart -eq 1 ]; then
 271     service xinetd restart || exit $?
 272 fi
 273
 274 # Mail root
 275 #
 276 cp_mail "$PKG"
 277
 278 #DEBHELPER#
 279
 280 exit 0