Shell Programming and Scripting

#!/bin/sh
#set -x

################### Method to Create a User ########################

createUser() {
        for w in `cat $1`;
        do
                export user=$(printf '%s\n' "$w";)
                useradd -d $4$user -m $user -p $(perl -e 'print
crypt("password", "password")') > /dev/null
                if [[ $? -ne 0 ]]; then
                        echo "User $user you are trying to add already exists."
                        echo "Exiting..."
                        exit 1;
                fi
                echo "$user added with home_directory $4$user and
default password: password"
                echo "Copying files..."
                copyFiles $1 $2 $3 $4
        done
        return 0;
}

################### Create User Ends ################################

################## Copying User Files ##############################

copyFiles() {
        cd $4$user
        old=_old
        if [[ $? -eq 0 ]]; then
                echo "file for $4$user already exists !"
                echo "Do you want to overwrite the file (y/n):\c"
                read answer
                if [[ $answer -eq y || $answer -eq Y ]]; then
                        mv $4$user $4$user$old > /dev/null
                        mkdir /$4/$user > /dev/null
                        for i in `cat $2`
                        do
                                cp $3$i $4$user > /dev/null
                        done
                elif [[ $answer -eq n || $answer -eq N ]]; then
                        for i in `cat $2`
                        do
                                cp $3$i $4$user > /dev/null
                        done
                fi
                chmod 700 $4$user /dev/null
        fi
}

################# Copying User Files Ends ###########################
################################### Main ##############################
        clear

        # check command line arguments count
        if [[ $# -lt 4 ]] ; then
                echo "Command line arguments are need to run the script"
                echo "Usage: <Script Name>  path_to_username_list
files_list_path master_copies_path users_home_folder_path"
                echo "Exiting..."
                exit 1;
        fi

        # validate command line arguments
        wd=$(pwd)
        if  [[ $# -ne 0 ]]; then
                ls $1 > /dev/null
                if [[ $? -ne 0 ]]; then
                        echo "Error: Path to username list doesnt
exist, Please provide correct path"
                        echo "Exiting..."
                        exit 1;
                fi
                ls $2 > /dev/null
                if [[ $? -ne 0 ]]; then
                        echo "Error: Path to file listing file names
to be copied doesnot exist"
                        echo "Exiting..."
                        exit 1;
                fi
                ls $3 > /dev/null
                if [[ $? -ne 0 ]]; then
                        echo "Error: Path to the master copies doestnot exist"
                        echo "Exiting..."
                           exit 1;
                fi
        fi
        for i in `cat $2`
        do
                ls /$3/$i > /dev/null
                if [[ $? -ne 0 ]]; then
                        echo "file $i doesnt exist in $3"
                        echo "Exiting..."
                        exit 1;
                fi

        done
        cd $wd > /dev/null

        # Calling user creation method
        createUser $1 $2 $3 $4

############################# Main Ends ###############################
Arguments
1. complete path to the file listing the names of the user, eg:
/home/userlist where userlist is the filename

2. complete path to the file listing the names of the files to be
copied, eg: /root/filelistdir/filelist where filelist is the name of
the file containing filenames.

3. Complete path to the folder where the files are present, eg: /root/filelistdir/

4. Complete path where the users home path needs to be created.

$ bash -x script.sh

if [[ $answer -eq y || $answer -eq Y ]]; then
                        mv $4$user $4$user$old > /dev/null
                        mkdir /$4/$user > /dev/null
                        for i in `cat $2`
                        do
                                cp $3$i $4$user > /dev/null
                        done
                elif [[ $answer -eq n || $answer -eq N ]]; then
                        for i in `cat $2`
                        do
                                cp $3$i $4$user > /dev/null
                        done
                fi

copyFiles() {
        cd $4$user
        old=_old
        if [[ $? -eq 0 ]]; then
                echo "file for $4$user already exists !"
                echo "Do you want to overwrite the file (y/n):\c"
                read answer