First commit

shellchooser.sh

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+#!/bin/bash
+
+################################################################################
+#                                                                              #
+#  Copyright (C) 2014 Jack-Benny Persson <jack-benny@cyberinfo.se>             #
+#                                                                              #
+#   This program is free software; you can redistribute it and/or modify       #
+#   it under the terms of the GNU General Public License as published by       #
+#   the Free Software Foundation; either version 2 of the License, or          #
+#   (at your option) any later version.                                        #
+#                                                                              #
+#   This program is distributed in the hope that it will be useful,            #
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              #
+#   GNU General Public License for more details.                               #
+#                                                                              #
+#   You should have received a copy of the GNU General Public License          #
+#   along with this program; if not, write to the Free Software                #
+#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  #
+#                                                                              #
+################################################################################
+
+# shellchooser
+Version="0.1"
+Author="Jack-Benny Persson (jack-benny@cyberinfo.se)"
+
+# Binaries
+Which="/usr/bin/which"
+# Binaries entered in the list will be avalible to the script as variables with
+# the first letter uppercase
+Binaries=(cp printf cat mktemp rm tail dialog)
+
+# Variables
+Skel="/etc/skel"
+
+### Functions ###
+
+# Print version information
+print_version()
+{
+        $Printf "\n\n$0 - $Version\n"
+}
+
+# Print help information
+print_help()
+{
+        print_version
+        $Printf "$Author\n"
+        $Printf "Shell Chooser\n"
+	/bin/cat <<-EOT
+
+	Options:
+	-h
+	   Print detailed help screen
+	-V
+	   Print version information
+	EOT
+}
+
+# Create our chooser dialog
+chooser()
+{
+	Temp=`$Mktemp -t chooser.XXXX`
+	$Dialog --backtitle "Shell Chooser" \
+	--menu "Choose your shell" 10 60 3 "/bin/bash" Bash \
+	"/bin/dash" Dash "/bin/csh" Csh 2> $Temp
+	return $?
+	Shell=`$Cat $Temp`
+}
+
+# Check out environment variables
+check_env()
+{
+	case $Shell in
+	"/bin/bash")
+		diff ${HOME}/.profile ${Skel}/.profile &> /dev/null
+		if [ $? -ne 0 ]; then
+			$Cp ${Skel}/.profile ${HOME}
+		fi
+		diff ${HOME}/.bashrc ${Skel}/.bashrc &> /dev/null
+		if [ $? -ne 0 ]; then
+			$Cp ${Skel}/.bashrc ${HOME}
+		fi
+		;;
+	"/bin/csh")
+		;;
+	esac
+}
+
+# Create variables with absolute path to binaries and check
+# if we can execute it (binaries will be avaliable in 
+# variables with first character uppercase, such as Grep)
+Count=0
+for i in ${Binaries[@]}; do
+	$Which $i &> /dev/null
+	if [ $? -eq 0 ]; then
+		declare $(echo ${Binaries[$Count]^}=`${Which} $i`)
+		((Count++))
+	else
+		echo "It seems you don't have ${Binaries[$Count]} installed"
+		exit 1
+	fi
+done
+
+# Parse command line options and arguments
+while getopts Vh Opt; do
+       	case "$Opt" in
+       	h) print_help
+   	   exit 0
+       	   ;;
+       	V) print_version
+   	   exit 0
+       	   ;;
+       	*) short_help
+       	   exit 1
+       	   ;;
+       	esac
+done
+
+
+### Main ###
+chooser
+if [ $? -ne 0 ]; then
+	echo "Aborting..."
+	exit 1
+fi
+check_env
+`$Shell`
+
+
+exit 0