Take care, not to delete directory where this script is running. Minor changes at script output

change_network_gateway.sh

@@ -1,11 +1,32 @@
 #!/usr/bin/env bash
 
+# =============
+# --- Some Definitions
+# =============
 
 base_dir=/root/Office_Networks
 chown -R root:root $base_dir
 
 logfile=$(mktemp)
 
+
+# ---
+# --- DON'T MAKE CHANGES AFTER THIS LINE
+# ---
+
+
+# =============
+# --- Some functions
+# =============
+
+# - Is this script running on terminal ?
+# -
+if [[ -t 1 ]] ; then
+      terminal=true
+else
+   terminal=false
+fi
+
 function usage() {
    if [ -n "$1" ];then
       echo -e "\nError: $1"
@@ -44,7 +65,7 @@ Usage: `basename $0` <network-name>
 
 Notice:
 
-   !! To change the network, you have to chroot into /ro !!
+   !! If you are on a readonly system, chroot into /ro !!
 
    remountrw
    rebind on
@@ -95,15 +116,27 @@ info (){
 
 
 echo_OK() {
+   if $terminal ; then
       echo -en "\\033[45G[  \\033[1;32mOK\\033[0;39m  ]\n"
+   else
+      echo " .. [  OK  ]"
+   fi
 }
 
 echo_FAILED() {
+   if $terminal ; then
       echo -en "\\033[45G[ \\033[1;31mFAIL\\033[0;39m ]\n"
+   else
+      echo " .. [ FAIL ]"
+   fi
 }
 
 echo_SKIPPED() {
-   echo -en "\\033[45G[ \\033[37mSkipped\\033[0;39m ]\n"
+   if $terminal ; then
+      echo -en "\033[45G[ \033[37mSKIP\033[m ]\n"
+   else
+      echo " .. [ SKIP ]"
+   fi
 }
 
 [ $# -ne "1" ] && usage "wrong number of arguments"
@@ -377,20 +410,50 @@ else
 fi
 
 
-# - /usr/local/src directory
+# - /root/bin directory
 # -
+src_dir=${base_dir}/${network}/bin
+dst_dir=$(realpath /root/bin)
 echo -en "\t/root/bin directory"
-if [[ -d "${base_dir}/${network}/bin" ]]; then
+omitted=false
-   if [[ ! -d "/root/bin" ]]; then
+msg=""
-      mkdir  /root/bin > $logfile 2>&1
+if [[ -d "$src_dir" ]]; then
+   if [[ ! -d "$dst_dir" ]]; then
+      mkdir $dst_dir > $logfile 2>&1
    fi
-   cp -a ${base_dir}/${network}/bin/* /root/bin/ > $logfile 2>&1
+
+   # - Delete all existing files/directories of $dst_dir, but
+   # - ommit directory, where this script is running..
+   # - 
+   while IFS='' read -r -d '' file ; do
+      if [[ "$(basename $file)" = "$(basename $(realpath $(dirname $0)))" ]]; then
+         omitted=true
+         msg="Existing Directory '$(basename $file)' was not deleted, because this script is running there!"
+         continue
+      fi
+      rm -r $file
+   done  < <(find "$dst_dir" -mindepth 1 -maxdepth 1 -print0)
+   while IFS='' read -r -d '' file ; do
+      if [[ "$(realpath $(dirname $0))" = "${dst_dir}/$(basename $file)" ]] ; then
+         omitted=true
+         if [[ -n "$msg" ]];then
+            msg="$msg\n\t          New Directory '$(basename $file)' was also not copied."
+            continue
+         else
+            msg="Directory '$(basename $file)' was omitted, because this script is running there!"
+         fi
+      fi
+      cp -a ${file} ${dst_dir}/ > $logfile 2>&1
+   done  < <(find "$src_dir" -mindepth 1 -maxdepth 1 -print0)
    if ! $_rval ; then
       echo_FAILED
       error $(cat $logfile)
    else
       echo_OK
    fi
+   if $omitted ; then
+      info "$msg"
+   fi
 else
    echo_SKIPPED
 fi
@@ -683,7 +746,6 @@ echo -en "\tSetting up rc.local.."
 if [ "$network" = "NONE-CKUBU" -o "$network" = "NONE-WF" -o "$network" = "GA-Ersatz" ];then 
    cp -a ${base_dir}/rc.local.NONE /etc/rc.local > $logfile 2>&1
 else 
-   #cp -a ${base_dir}/rc.local /etc/rc.local 
    cp -a ${base_dir}/${network}/rc.local.${network} /etc/rc.local > $logfile 2>&1
 fi 
 if [ "$?" != "0" ]; then 
@@ -693,28 +755,24 @@ else
    echo_OK 
 fi
 
-if $_add_support_if ; then
+_error=false
-   echo -e "   After restarting, you can reach that device"
-   echo -e "   at ip-address: \\033[1;33m172.16.1.1\\033[0;39m"
-fi
-
 if [ "$(stat -c %d:%i /)" = "$(stat -c %d:%i /proc/1/root/.)" ]; then
 
-   warn "This is NOT a chrooted environment. Maybe thats ok. \n\n\t\033[1;37mIf this is a readonly system, take care, you are chrooted into /ro.\n\tOtherwise changes are not persistent.\033[m"  
+   if [[ -d "/ro" ]] ; then
+      error "It seems, this is a readonly system and you are not chrooted.\n\n\t            \033[1;37mChanges made by this script are not persistent!!\033[m\n\n\t            Change root to directory '/ro' (\033[1;37mchroot /ro /bin/bash\033[m) and\n\t            run this script again.\033[m"
+      #info "Change root to directory '/ro' (\033[1;37mchroot /ro /bin/bash\033[m) and run this script again.\033[m"  
+   fi
+
+   _error=true
 
-   #echo ""
-   #echo ""
-   #echo -e "  \\033[1;31m Take care, you are chrooted into /ro. Otherwise"
-   #echo -e "   changes are not persistent \\033[0;39m !!"
-   #echo ""
-   #echo ""
 else
+
    info "Programm was running in a chrooted environment.\n\n\t\033[1;37mExit from chroot environment and restart to make changes active..\033[m"
 
-   #echo ""
+fi
-   #echo ""
+
-   #echo -e "   \\033[1;33mExit from chroot environment and restart to make changes active..\\033[0;39m"
+if $_add_support_if i&& ! $_error ; then
-   #echo ""
+   info "After restarting, you can reach this machine\n\t          at ip-address: \033[1;33m172.16.1.1\033[m"
 fi
 
 exit 0