Release new version 2.13.0

[grml-scripts.git] / usr_sbin / grml-hostname

diff --git a/usr_sbin/grml-hostname b/usr_sbin/grml-hostname
index b48449e..400aeef 100755 (executable)
--- a/usr_sbin/grml-hostname
+++ b/usr_sbin/grml-hostname
@@ -4,49 +4,88 @@
 # Authors:       (c) Michael Prokop <mika@grml.org>
 # Bug-Reports:   see http://grml.org/bugs/
 # License:       This file is licensed under the GPL v2.
-# Latest change: Son Dez 17 16:23:34 CET 2006 [mika]
 ################################################################################
 
-if [ $UID != 0 ] ; then
-   echo Error: become root before starting $0 >& 2
-   exit 100
-fi
+# shellcheck disable=SC1091
+. /etc/grml/script-functions
+
+check4root || exit 1
+
+[ -n "$SUDO_USER" ] && RUNASUSER=$SUDO_USER || RUNASUSER=grml
 
 PN='grml-hostname'
-TMP=$(mktemp)
 OLDHOSTNAME="$(hostname)"
 
-if [ -x /usr/bin/random-hostname ] ; then
-   HOSTNAME="$(/usr/bin/random-hostname)"
+case "$1" in -h|--help) echo "Usage: $0 [hostname]">&2; exit 1 ;; esac
+
+if [ -n "$1" ] ; then
+   NEW_HOSTNAME="$1"
+   NONINTERACTIVE=1
 else
-   HOSTNAME="$(hostname)"
+   if [ -x /usr/bin/random-hostname ] ; then
+      NEW_HOSTNAME="$(/usr/bin/random-hostname)"
+   else
+      NEW_HOSTNAME="$(hostname)"
+   fi
 fi
 
-bailout() {
-  rm -f $TMP
-  exit 1
-}
-trap bailout 1 2 3 15
-
-# running inside grml2hd? Don't warn because of hostname + X
-[ -n "$GRML2HD" ] || MSG='\n\nNotice: setting a different hostname while running X is *not* recommend!'
+if [ -z "$NONINTERACTIVE" ] ; then
+   NEW_HOSTNAME="$(dialog --stdout --title "${PN}" --extra-button --extra-label "Propose hostname" \
+   --inputbox "Set hostname (/etc/hostname, /etc/hosts and /etc/postfix/main.cf will be adjusted)\
+\\n\\nTip: press 'Propose hostname' for another proposal" 14 70 "$NEW_HOSTNAME")"
+  retval=$?
+else
+  retval=0
+fi
 
-HOSTNAME="$(dialog --stdout --title "${PN}" --extra-button --extra-label "Propose hostname" \
---inputbox "Set hostname (/etc/hostname, /etc/hosts and /etc/postfix/main.cf will be adjusted)\
-\n\nTip: press 'Propose hostname' for another proposal${MSG}" 14 70 $HOSTNAME)"
-retval=$?
+# stupid + simplified checking for valid hostname (according to RFC 952)
+VALIDATE=$(echo "$NEW_HOSTNAME" | tr --delete '[:alnum:]-')
+if [ -n "$VALIDATE" ] ; then
+  if [ -z "$NONINTERACTIVE" ] ; then
+    dialog --title "${PN}" \
+      --msgbox "Error: invalid characters specified in hostname: '$VALIDATE' can not be used inside hostnames." \
+      0 0
+    exec "$0"
+  else
+    echo "Error: invalid characters specified in hostname: '$VALIDATE' can not be used inside hostnames." >&2
+    exit 1
+  fi
+fi
 
 case $retval in
   0)
-     echo "$HOSTNAME" > /etc/hostname
-     sed -i "s/^127.0.0.1[ \t]*$OLDHOSTNAME[ \t]*localhost/127.0.0.1       $HOSTNAME localhost/" /etc/hosts
-     sed -i "s/^::1[ \t]*ip6-localhost ip6-loopback[ \t]*$OLDHOSTNAME/::1     ip6-localhost ip6-loopback $HOSTNAME/" /etc/hosts
+     echo "$NEW_HOSTNAME" > /etc/hostname
+     echo "$NEW_HOSTNAME" > /etc/mailname
+     # shellcheck disable=SC1117
+     sed -ir "s/^\(127.0.0.1\s*\).*localhost.*/\1$NEW_HOSTNAME localhost/" /etc/hosts
+     # shellcheck disable=SC1117
+     sed -ir "s/^\(::1\s*\).*ip6-localhost.*/\1ip6-localhost ip6-loopback $NEW_HOSTNAME/" /etc/hosts
+
      POSTFIX=''
      if [ -r /etc/postfix/main.cf ] ; then
-       sed -i "s/^myhostname = .*/myhostname = $HOSTNAME/" /etc/postfix/main.cf && POSTFIX='
+       sed -i "s/^mydestination = .*/mydestination = $NEW_HOSTNAME, localhost, localhost.localdomain/" /etc/postfix/main.cf && \
+       sed -i "s/^myhostname = .*/myhostname = $NEW_HOSTNAME/" /etc/postfix/main.cf && POSTFIX='
 Configuration of myhostname in /etc/postfix/main.cf has been adjusted as well. Do not forget to restart postfix if necessary.'
      fi
-     dialog --stdout --title "${PN}" --msgbox "Setting hostname to $HOSTNAME was successful.$POSTFIX" 0 0
+
+     if [ -n "$DISPLAY" ] ; then
+       if sudo -u $RUNASUSER xauth add "$(xauth -n list | grep "${OLDHOSTNAME}/unix:0" | sed "s|${OLDHOSTNAME}/unix:0|${NEW_HOSTNAME}/unix:0|")" ; then
+         sudo -u $RUNASUSER xauth remove "${OLDHOSTNAME}/unix:0"
+       fi
+     fi
+
+     if [ -x /etc/init.d/avahi-daemon ] && pgrep avahi-daemon >/dev/null ; then
+       /etc/init.d/avahi-daemon restart
+     fi
+
+     hostname "$NEW_HOSTNAME"
+
+     if [ -z "$NONINTERACTIVE" ] ; then
+        dialog --stdout --title "${PN}" --msgbox "Setting hostname to $NEW_HOSTNAME was successful.$POSTFIX" 0 0
+     else
+        echo "Setting hostname to $NEW_HOSTNAME: done"
+     fi
+     exit 0
      ;;
   1)
      echo "Cancel pressed."
@@ -58,6 +97,4 @@ Configuration of myhostname in /etc/postfix/main.cf has been adjusted as well. D
      ;;
 esac
 
-rm -f $TMP 2>/dev/null
-
 ## END OF FILE #################################################################