删除用户脚本

#!/bin/bash
#
# Delete_User - Automates the 4 steps to remove an account
#
#################################################################
# 
# Define Functions
#
#################################################################
function get_answer {
#
    unset ANSWER
    ASK_COUNT=0
#
    while [ -z "$ANSWER" ] # while no answer is given, keep asking
    do
        ASK_COUNT=$[ $ASK_COUNT + 1 ]
#
        case $ASK_COUNT in          # If user gives no answer in time allowed
        2)
            echo 
            echo "Please answer the question."
            echo
        ;;
        3)
            echo 
            echo "One last try... please answer the question."
            echo
        ;;
        4)
            echo 
            echo "Since you refuse to answer the question..."
            echo "exiting program."
            echo
            #
            exit
        ;;
        esac
#
        echo
#   
        if [ -n "$LINE2" ]
        then
            echo $LINE1         # Print 2 lines
            echo -e $LINE2" \c"
        else                    # Print 1 line
            echo -e $LINE1" \c"
        fi
#
# Allow 60 seconds to answer before time-out
        read -t 60 ANSWER
    done
#
# Do a little variable clean-up
#
    unset LINE1
    unset LINE2
#
}    #end of get_answer function
#
#################################################################
function process_answer {
#
    case $ANSWER in
    y|Y|YES|yes|yEs|yeS|YEs|yES)
    # If user answers "yes".do nothing.
    ;;
    *)
    # If user answers anything but "yes", exit script
        echo
        echo $EXIT_LINE1
        echo $EXIT_LINE2
        echo
        exit
    ;;
    esac
    #
    # Do a little variable clean-up
    unset EXIT_LINE1
    unset EXIT_LINE2
#
} #End of process_answer function
#
################################################################
#
# End of Function Definitions
#
############### Main Script #################################
#
# Get name of User Account to check
#
echo "Step #1 - Determine User Account name to delete "
echo
LINE1="Please enter the username of the user"
LINE2="account you wish to delete from system:"
get_answer
USER_ACCOUNT=$ANSWER
#
# Double check with script user that this is the correct User Account
#
LINE1="Is $USER_ACCOUNT the user account"
LINE2="you wish to delete from the system?[ y/n ]:"
get_answer
#
############################################################
#
# Check that USER_ACCOUNT is really an account on the system
#
USER_ACCOUNT_RECORD=$(cat /etc/passwd | grep -w $USER_ACCOUNT)
#
if [ $? -eq 1 ]         # If the account is not found, exit script
then
    echo 
    echo "Account, $USER_ACCOUNT, not found."
    echo "Leaving the script..."
    echo
    exit
fi
#
echo
echo "I found this record:"
echo $USER_ACCOUNT_RECORD
echo
#
LINE1="Is this the correct User Account?[y/n]:"
get_answer
#
#
# Call process_answer function:
#   if user answers anything but "yes", exit script
#
EXIT_LINE1="Because the account, $USER_ACCOUNT, is not "
EXIT_LINE2="the one you wish to delete, we are leaving the script..."
process_anser
#
##############################################################
#
# Search for any running processes that belong to the User Account
#
echo
echo "Step #2 - Find process on system belonging to user account"
echo
echo "$USER_ACCOUNT has the following processes running: "
echo
#
ps -u $USER_ACCOUNT      #List the processes running
#
case $? in
1)          # No processes running for this User Account
    #
    echo "There are no processes for this account currently running."
    echo
;;
0)  # Processes running for this User Account.
    # Ask Script User if wants us to kill the processes.
    #
    unset ANSWER            # I think this line is not needed
    LINE1="Would you like me to kill the process(es)? [y/n]:"
    get_answer
    #
    case $ANSWER in
    y|Y|YES|yes|Yes|yEs|yeS|YEs|yES)    # if user answer "yes",
        #kill User Account processes
        #
        echo 
        #
        # Clean-up temp file upon signals
        #
        trap "rm $USER_ACCOUNT_Running_Process.rpt" SIGTERM SIGINT SIGQUIT
        #
        # List user processes running
        ps -u $USER_ACCOUNT > $USER_ACCOUNT_Running_Process.rpt
        #
        exec < $USER_ACCOUNT_Running_Process.rpt        # Make report Std Input
        #
        read USER_PROCESS_REC               # First record will be blank
        read USER_PROCESS_REC
        #
        while [ $? -eq 0 ]
        do
            # obtain PID
            USER_PID=$(echo $USER_PROCESS_REC | cut -d " " -f1 )
            kill -9 $USER_PID
            echo "Killed process $USER_PID"
            read USER_PROCESS_REC
        done
        #
        echo
        #
        rm $USER_ACCOUNT_Running_Process.rpt            # Remove temp report
    ;;
    *) # If user answers anything but "yes", do not kill.
        echo
        echo "Will not kill the process(es)."
        echo
    ;;
    esac
;;
esac
###################################################################################
#
# Create a report of all files owned by User Account
#
echo
echo "Step #3 - Find files on system belonging to user account"
echo
echo "Creating a report of all files owned by $USER_ACCOUNT."
echo
echo "It is recommended that you backup/archive these files."
echo "and then do one of two things:"
echo " 1) Delete the files"
echo " 2) Change the files' ownership to a current user account."
echo
echo "Please wait. This may take a while..."
#
REPORT_DATE=`date +%y%m%d`
REPORT_FILE=$USER_ACCOUNT"_Files_"$REPORT_DATE".rpt"
#
find / -user $USER_ACCOUNT > $REPORT_FILE 2>/dev/null
#
echo
echo "Report is complete."
echo "Name of report:   $REPORT_FILE"
echo "Location of report:     `pwd`"
echo
################################################################
#
# Remove User Account
echo
echo "Step #4 - Remove user account"
echo
#
LINE1="Do you wish to remove $USER_ACCOUNT's account from system? [y/n]:"
get_answer
#
# Cass process_answer function:
#   if user answers anything but "yes", exit script
#
EXIT_LINE1="Since you do not wish to remove the user account."
EXIT_LINE2="$USER_ACCOUNT at this time, exiting the script..."
process_answer
#
userdel $USER_ACCOUNT           # delete user account
echo
echo "User account, $USER_ACCOUNT, has been removed"
echo
#