Initial commit and first release~

Makefile

@@ -0,0 +1,18 @@
+# Author: Bandie <bandie@chaospott.de>
+# Copyright: Bandie, 2019, GNU-GPLv3
+all: 
+	@echo "Nothing to make. Please run \"make install\"."
+	@exit 0
+install:
+	@echo "Installing grub-ownership..."
+	install -vDm 755 etc/grub.d/000_ownership -t "$(PREFIX)/etc/grub.d/"
+	@echo "Appending not existent config keys..."
+	./tools/grub_append_cfgkeys -i $(PREFIX)/etc/default/grub
+	@echo "DONE!"
+
+uninstall:
+	@echo "Remove grub-ownership..."
+	rm $(PREFIX)/etc/grub.d/000_ownership
+	@echo "Removing entries from config file..."
+	./tools/grub_append_cfgkeys -r $(PREFIX)/etc/default/grub
+	@echo "DONE!"

README.md

@@ -1,2 +1,37 @@
 # grub-ownership
-Show an owner when grub is booting up
+Show an owner when grub is booting up.
+
+## Installation
+
+```
+sudo make install
+# OR with an autotools like PREFIX:
+sudo PREFIX=/another/root make install
+```
+
+
+## Configuration
+
+Edit the file `/etc/default/grub`.
+
+This is an example config
+
+```
+# Name and mail address of owner
+OWNER="Alex Alexsen <a@a.tld>"
+
+# Amounts of seconds for how long the owner information is displayed. It is skippable via ESC.
+OWNER_TIMEOUT=10
+```
+
+
+
+## Uninstall
+
+```
+sudo make uninstall
+# OR with an autotools like PREFIX:
+sudo PREFIX=/another/root make uninstall
+```
+
+

build/etc/default/grub

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+
+# Name and mail address of owner
+#OWNER="John Doe <john@doe.tld>"
+
+# Amounts of seconds for how long the owner information is displayed. It is skippable via ESC. Default: 5
+#OWNER_TIMEOUT=5

build/etc/grub.d/000_ownership

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+#!/bin/sh
+# Author: Bandie <bandie@chaospott.de>
+# Copyright: Bandie, 2019, GNU-GPLv3
+
+set -e
+
+## Get params from /etc/default/grub
+OWNER=$(cat /etc/default/grub | egrep "^OWNER=.*$" | sed "s/.*=\(.*\)/\1/;s/\"//g;s/'//g")
+OWNER_TIMEOUT=$(cat /etc/default/grub | egrep "^OWNER_TIMEOUT=.*$" | sed "s/.*=\(.*\)/\1/;s/\"//g;s/'//g")
+
+
+## Check if OWNER is set
+if [ -z "$OWNER" ]; then
+	echo "/etc/default/grub: No OWNER set." >&2
+	exit 0
+fi
+
+## Notify user about ownership
+echo "Show ==> $OWNER <== as owner" >&2
+
+
+## Generate spaces in case if the owner has a very short name
+for ((i=${#OWNER}; i<6; i++)); do
+	NSP="$NSP "
+done
+
+## Generate border around the owner message
+B="##########"
+for ((i=6; i<${#OWNER}; i++)); do
+	B="${B}#"
+	SPACE="$SPACE "
+done
+
+
+## Check if OWNER_TIMEOUT is set. If not, default 5
+if ! [[ $OWNER_TIMEOUT =~ ^[0-9]+$ ]]; then
+	OWNER_TIMEOUT=5
+	echo "/etc/default/grub: No OWNER_TIMEOUT set. Using default: 5 seconds." >&2
+fi
+
+## Write it into the grub.cfg
+cat << EOF
+echo ""
+echo "$B"
+echo "# Owner: ${SPACE}#"
+echo "# $OWNER $NSP#"
+echo "$B"
+echo ""
+echo ""
+sleep -i $OWNER_TIMEOUT
+EOF

etc/grub.d/000_ownership

@@ -0,0 +1,51 @@
+#!/bin/sh
+# Author: Bandie <bandie@chaospott.de>
+# Copyright: Bandie, 2019, GNU-GPLv3
+
+set -e
+
+## Get params from /etc/default/grub
+OWNER=$(cat /etc/default/grub | egrep "^OWNER=.*$" | sed "s/.*=\(.*\)/\1/;s/\"//g;s/'//g")
+OWNER_TIMEOUT=$(cat /etc/default/grub | egrep "^OWNER_TIMEOUT=.*$" | sed "s/.*=\(.*\)/\1/;s/\"//g;s/'//g")
+
+
+## Check if OWNER is set
+if [ -z "$OWNER" ]; then
+	echo "/etc/default/grub: No OWNER set." >&2
+	exit 0
+fi
+
+## Notify user about ownership
+echo "Show ==> $OWNER <== as owner" >&2
+
+
+## Generate spaces in case if the owner has a very short name
+for ((i=${#OWNER}; i<6; i++)); do
+	NSP="$NSP "
+done
+
+## Generate border around the owner message
+B="##########"
+for ((i=6; i<${#OWNER}; i++)); do
+	B="${B}#"
+	SPACE="$SPACE "
+done
+
+
+## Check if OWNER_TIMEOUT is set. If not, default 5
+if ! [[ $OWNER_TIMEOUT =~ ^[0-9]+$ ]]; then
+	OWNER_TIMEOUT=5
+	echo "/etc/default/grub: No OWNER_TIMEOUT set. Using default: 5 seconds." >&2
+fi
+
+## Write it into the grub.cfg
+cat << EOF
+echo ""
+echo "$B"
+echo "# Owner: ${SPACE}#"
+echo "# $OWNER $NSP#"
+echo "$B"
+echo ""
+echo ""
+sleep -i $OWNER_TIMEOUT
+EOF

tools/grub_append_cfgkeys

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+#!/bin/bash
+# Author: Bandie <bandie@chaospott.de>
+# Copyright: Bandie, 2019, GNU-GPLv3
+
+CONFIG="/etc/default/grub"
+TMPCFG="grub_tmp"
+CFGKEYS=(
+
+  ## 'COMMENT'
+  ## 'KEY'
+  ## 'EXAMPLE_VALUE'
+
+  'Name and mail address of owner'
+  'OWNER'
+  '"John Doe <john@doe.tld>"'
+  
+  'Amounts of seconds for how long the owner information is displayed. It is skippable via ESC. Default: 5'
+  'OWNER_TIMEOUT'
+  '5'
+)
+
+
+function testPerms(){
+  if ! [ -e "$CONFIG" ]; then
+    echo "$0: ERROR: $CONFIG does not exist!"
+    exit 1
+  fi
+  if ! [ -w "$CONFIG" ]; then
+    echo "$0: ERROR: Permission denied for file $CONFIG"
+    exit 1
+  fi
+}
+
+
+function append(){
+  testPerms
+
+  for ((i=0; i<${#CFGKEYS[@]}; i+=3)); do
+    cat "$CONFIG" | grep "${CFGKEYS[(($i+1))]}" >> /dev/null
+    if [ $? -ne 0 ]; then
+      echo "Adding ${CFGKEYS[(($i+1))]} to $CONFIG..."
+      echo "" >> $CONFIG
+      echo "# ${CFGKEYS[$i]}" >> $CONFIG
+      echo "#${CFGKEYS[(($i+1))]}=${CFGKEYS[(($i+2))]}" >> $CONFIG
+    fi
+
+  done
+}
+
+function remove(){
+  testPerms
+  
+  for ((i=0; i<${#CFGKEYS[@]}; i+=3)); do
+    echo "Removing ${CFGKEYS[(($i+1))]} from $CONFIG..."
+    sed "$!N;/${CFGKEYS[$i]}/!P;D" "$CONFIG" | sed "/.*${CFGKEYS[(($i+1))]}=.*/d" > "$TMPCFG"
+    cp "$TMPCFG" "$CONFIG"
+  done
+  rm $TMPCFG
+}
+
+function h(){
+  echo "$0: Usage:"
+  echo "$0 -i [ CONFIGFILE ] - Install config keys to config file. Configfile optional."
+  echo "$0 -r [ CONFIGFILE ] - Remove config keys from config file. Configfile optional."
+}
+
+if [ -n "$2" ]; then
+  CONFIG="$2"
+fi
+
+case $1 in
+"-i")
+  append
+  ;;
+
+"-r")
+  remove
+  ;;
+
+*)
+  h
+esac