Ch 101 Chapter 10 Introduction to Batch Files. Ch 102 Overview A batch file is a text file that...

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Chapter 10Chapter 10

Introduction to Batch Files

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OverviewOverview

A batch file is a text file that contains an ordered

series of commands.

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OverviewOverview

Batch files allow the user to …

automate a process create more powerful commands

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Concepts Concepts ofof Batch Batch & Interactive Processing& Interactive Processing

A batch file contains one or more commands.

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A batch file must have the extension .BAT

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Batch files allow the user to …

minimize keystrokes minimize the possibility of errors

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In interactive processing (real-time mode) …

the user directly interacts with computer info. is processed without delay

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How Batch Files How Batch Files WorkWork

The difference between Data and Program files is determined by their file

extensions.

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Priority rules are followed when the OS looks for a file to load and execute.

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The .BAT extension is the last file extension the OS looks for when trying to

execute a program.

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Using Using EDITEDIT to to Write Batch FilesWrite Batch Files

To write a batch file … must use a program that creates ASCII text files.

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Word processing programs can create text files, but …

they are very large they take a long time to load into memory

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EDIT is the small, simple text editor in MS-DOS

used to write batch files.

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Notepad is the text editor in Windows that can be used to write batch files.

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Activity:Activity: WritingWritingand Executing aand Executing a

Batch FileBatch File

. . .

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Writing and Executing Writing and Executing a Batch File to Save a Batch File to Save

KeystrokesKeystrokes

It is sometimes easier to use COPY CON instead of EDIT

to write a simple batch file.

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Writing and Executing Writing and Executing

a Batch File to Save a Batch File to Save KeystrokesKeystrokes

Two drawbacks to using COPY CON:

Cannot correct errors once <Enter> is pressed Cannot correct errors in existing files

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Writing and Executing Writing and Executing a Batch File to Save a Batch File to Save

KeystrokesKeystrokes

Must use EDIT to correct errors.

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Activity:Activity: Writing andWriting andExecuting a One-Executing a One-Letter Batch FileLetter Batch File

. . .

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Using Batch FilesUsing Batch Files toto Load Application Load Application

SoftwareSoftwareTo launch an application in Windows …

click program icon select program from menu use the toolbar

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Using Batch Files to Using Batch Files to Load Application Load Application

SoftwareSoftwareTo launch an application program from the command line …

must create a batch file

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Using Batch Files to Using Batch Files to Load Application Load Application

SoftwareSoftware

Need to follow three steps in order to load application

software in MS-DOS.

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Activity:Activity: Using theUsing theHPB ApplicationHPB Application

PackagePackage

. . .

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Writing a Batch File Writing a Batch File to Load an to Load an

Application ProgramApplication Program

By creating a batch file, a user can simplify the process of

loading an application program in MS-DOS.

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Activity:Activity: Writing aWriting aBatch File to ExecuteBatch File to Execute

HPBHPB

. . .

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Creating Shortcuts for Creating Shortcuts for Batch Files on the Batch Files on the

DesktopDesktopTo run a batch file from Windows:

click file name in Explorer/My Computer create shortcut for file and place on desktop

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Activity:Activity: CreatingCreatinga Shortcut on thea Shortcut on the

DesktopDesktop

. . .

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Special Batch File Special Batch File CommandsCommands

There are nine commands specifically designed to be used in batch files.

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Special Batch FileSpecial Batch FileCommandsCommands

CALL CHOICE ECHO

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Special Batch File Special Batch File CommandsCommands

FOR GOTO IF

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Special Batch FileSpecial Batch FileCommandsCommands

PAUSE REM SHIFT

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The REM CommandThe REM Command

REM command (remarks)...statements keyed in by user that tell what is the purpose of the batch file

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Activity:Activity: UsingUsingREMREM

. . .

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The The ECHOECHO CommandCommand

ECHO command …

displays a command and the output of that command

to the screen.

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The default value for ECHO is ON.

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Can turn off the display of the command and only see the output of the command.

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Activity:Activity: UsingUsingECHOECHO

. . .

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Activity: Activity: Using Using ECHOECHO

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The The PAUSEPAUSE CommandCommand

PAUSE command …instructs the batch file to stop executing until the user takes some action.

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Activity:Activity: UsingUsingPAUSEPAUSE

. . .

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Stopping a Batch File Stopping a Batch File from Executingfrom Executing

Two ways to interrupt a batch file during execution:

Press <Ctrl> + C Press <Ctrl> + <Break>

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Activity:Activity: Quitting aQuitting aBatch FileBatch File

. . .

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Replaceable Replaceable Parameters in Batch Parameters in Batch

FilesFiles

Many commands use variable or replaceable

parameters.

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FilesFiles

Batch files can also use replaceable parameters.

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FilesFilesReplaceable parameters are

used to limit the number of batch files that do the

same thing, but use different names.

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FilesFilesPlace holders are needed to

indicate to the batch file that a variable (file name)

will be keyed in.

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FilesFilesThe place holder used in batch files is the percent sign (%), followed by a

number (0-9).

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FilesFilesThe % sign is a signal to the OS that a parameter is

coming.

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FilesFilesThe numbers (0-9) indicate

what position the parameter is on in the

command line.

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Activity:Activity: UsingUsingReplaceableReplaceableParametersParameters

. . .

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Multiple Replaceable Multiple Replaceable Parameters in Batch Parameters in Batch

FilesFilesMany commands used in

batch files may require more than one parameter.

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Multiple Replaceable Multiple Replaceable Parameters in Batch Parameters in Batch

FileFileBatch files can have up to 10 replaceable parameters

(%0-%9).

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Activity:Activity: UsingUsingMultiple ReplaceableMultiple Replaceable

ParametersParameters

. . .

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Activity: Activity: Using Using Multiple Replaceable Multiple Replaceable

ParametersParameters

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Creating Useful Creating Useful Batch FilesBatch Files

With batch files a user can create new commands that

are not provided by the OS.

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Activity:Activity: WritingWritingUseful Batch FilesUseful Batch Files

. . .

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Understanding Understanding AUTOEXEC.BATAUTOEXEC.BAT

AUTOEXEC.BAT is a file that …

runs when the system is booted contains specific commands that a user chooses to run

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Understanding Understanding AUTOEXEC.BATAUTOEXEC.BAT

Interactive booting …user is asked by the computer if s/he wants to execute each line in the CONFIG.SYS and AUTOEXEC.BAT files.

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Activity:Activity: Writing andWriting andUsing anUsing an

AUTOEXEC.BATAUTOEXEC.BAT File File

. . .

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Controlling the Controlling the Boot ProcessBoot Process

During booting process, the user may experience problems that are related to instruction

statements in the CONFIG.SYS or AUTOEXEC.BAT files.

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Controlling the Controlling the Boot ProcessBoot Process

By pressing certain function keys, the user can control

the boot process in order to correct problems that arise.

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Activity:Activity: BypassingBypassingAUTOEXEC.BATAUTOEXEC.BAT

. . .

Ch 101 Chapter 10 Introduction to Batch Files. Ch 102 Overview A batch file is a text file that...

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