备份shell脚本

backup_run.sh

#!/bin/sh
# backup_run

# script to run the backups
# loads in a setting file for the user to change

SOURCE=/home/bob/backup.defaults
check_source()
{
    # check_source
    # can we load the file
    # backup.defaults is the source file containing config/functions
    # make sure your path includes this directory you are runing from
    if [ -r $SOURCE ];then
      . $SOURCE # load $source
    else
        echo "`basename $0`: cannot locate default file"
        exit 1
    fi
}

header()
{
    # header
    USER=`whoami`
    MYDATE=`date +%A" "%e" of "%B-%Y`
    clear
    cat << HH
    User: $USER                 $MYDATE
                NETWORK SYSTEM BACKUP
                =====================
HH
}

change_settings()
{
    # change_settings
    # let the user see the default settings..
    header
    echo "Valid Entries Are..."
    echo "Tape Device: rmt0,rmt1,rmt3"
    echo "Mail Admin:yes,no"
    echo "Backup Type: full,normal,sybase "
    while :
    do
        echo -n -c "\n\n Tape Device To Be Used For This Backup [$_DEVICE] :"
        read T_DEVICE
        : ${T_DEVICE:=$_DEVICE}
        case $T_DEVICE in
            rmt0|rmt1|rmt3) break
                ;;
            *) echo "The device are either...rmt0,rmt1,rmt3"
                ;;
        esac
    done

    # if the user hits return on any of the fields, the default value will be used
    while :
    do
        echo -n "Mail Admin When Done       [$_INFORM] : "
        read T_INFORM
        : ${T_INFORM:=$_INFORM}
        case $T_INFORM in
            yes|Yes) break
                ;;
            no|No) break
                ;;
            *) echo "The choices are yes,no"
                ;;
        esac
    done

    while :
    do
        echo -n "Backup Type            [$_TYPE] :"
        read T_TYPE
        : ${T_TYPE:=$_TYPE}
        case $T_TYPE in
            Full|full) break
                ;;
            Normal|normal) break
                ;;
            Sybase|sybase) break
                ;;
            *) echo "The choices are either ... full,normal,sybase"
        esac
    done

    # re-assign the temp varialbes back to original variables that
    # were loaded in
    _DEVICE=$T_DEVICE;_INFORM=$T_INFORM;_TYPE=$T_TYPE
}

show_settings()
{
    # display current settings
    cat << HH
                Default Settings Are...
            Tape Device To Be Used  : $_DEVICE
            Mail Admin When Done    : $_INFORM
            Type Of Backup          : $_TYPE
            Log File Of Backup      : $_LOGFILE
HH

}

get_code()
{
    # users get 3 attempts at entering the correct code
    # _CODE is loaded in from the source file
    clear
    header
    _COUNTER=0
    echo "YOU MUST ENTER THE CORRECT CODE TO BE ABLE TO CHANGE DEFAULT SETTINGS"
    while :
    do
        _COUNTER=`expr $_COUNTER + 1`
        echo -n "Enter the code to change the settings: "
        read T_CODE
        # echo $_COUNTER
        if [ "$T_CODE" = "$_CODE" ];then
            return 0
        else
            if [ "$_COUNTER" -gt 3 ];then
                echo "Sorry incorrect code entered, you cannot change the settings..."
                return 1
            fi
        fi
    done
}

check_drive()
{
    # make sure we can rewind the tape
    mt -f /dev/$_DEVICE rewind > /dev/null 2>&1
    if [ $? -ne 0 ];then
        return 1
    else
        return 0
    fi
}

#====================== main =======================

# can we source the file
check_source
header
# display the loaded in variables
show_settings

# ask user if he/she wants to change any settings
if  continue_prompt "Do you wish To Change Some of The System Defaults" "Y";
then
    echo $?
    # yes then enter code name
    if get_code;then
        # change some settings
        change_settings
    fi
fi

#------------------ got settings... now do backup
if check_drive;then
    echo "tape OK..."
else
    echo "Cannot rewind the tape..Is it in the tape drive???"
    echo "check it out"
    exit 1
fi

# file system paths to backup
case $_TYPE in
    Full|full)
        BACKUP_PATH="sybase syb/suppor etc var bin apps usr/local"
        ;;
    Normal|normal)
        BACKUP_PATH="etc var bin apps usr/local"
        ;;
    Sybase|sybase)
        BACKUP_PATH="sybase syb/suppor"
        ;;
esac
# now for backup
cd /
echo "Now starting backup......"
find $BACKUP_PATH -print | cpio -ovB -O /dev/$_DEVICE >> $_LOGFILE 2>&1

# if the above cpio does not work on your system try cpio below, instead
# find $BACKUP_PATH -print | cpio -ovB > /dev/$_DEVICE >> $_LOGFILE 2>&1
# to get more information on the tape change -ovB to -ovcC66536

if [ "$_INFORM" = "yes" ];then
    echo "Backup finished check the log file" | mail admin
fi

backup.defaults

#!/bin/sh
# backup.defaults
# configuration default file for network backups
# edit this file at your own
# name backup.defaults
# --------------------------------------------
# not necessary for the environments to be in quotes.. but
_CODE="comet"
_LOGFILE="/appdva/backup/log.`date +%y%m%d`"
_DEVICE="rmt0"
_INFORM="yes"
_TYPE="Full"
#---------------------------------------------
continue_prompt()
{
    # continue_prompt
    # to call: continue_prompt "string to display" default_answer
    _STR=$1
    _DEFAULT=$2
    # check we have the right params
    if [ $# -lt 1 ];then
        echo "continue_prompt: I need a string to display"
        return 1
    fi
    while :
    do
        echo -n "$_STR [Y..N] [$_DEFAULT]:"
        read _ANS
        if [ "$_ANS" = "" ];then
            : ${_ANS:=$_DEFAULT}
            case $_ANS in
                Y) return 0
                    ;;
                N) return 1
                    ;;
            esac
        fi
        # user has selected something
        case $_ANS in
            y|Y|Yes|YES)
                return 0
                ;;
            n|N|No|NO)
                return 1
                ;;
            *) echo "Answer either Y or N, default is $_DEFAULT"
                ;;
        esac
        echo $_ANS
    done
}

$./backup_run.sh backup.defaults