Tag Archives: FILECHECK

CT_FILECHECK

Posted on by vivaclipper 
 FILECHECK()
 Calculates/computes/determines a checksum for a file

 Syntax

     FILECHECK(<cFile>) --> nCheckSum

 Argument

     <cFile>  Designates which file name (with path, if required), to
     check.

 Returns

     FILECHECK() returns a checksum value for <cFile>.

 Description

     FILECHECK() determines if there have been changes or read errors in a
     file, and then takes note of data backup.  This also allows you to
     protect your hard disk from simple viruses (see Examples).

 Note

     .  You must specify the argument.  If it is omitted or an
        unavailable file is specified, FILECHECK() returns an error code of -
        1.  You may use a drive and access path, but no wildcards.

 Examples

     .  Check database for changes:

        IF FILECHECK("CUST.DBF") <> Old_ChkSum
           ? "Warning! Data back-up required."
        ENDIF

     .  Check COMMAND.COM for changes:

        IF FILECHECK("\COMMAND.COM") <> Cmd_ChkSum
           ? "COMMAND.COM has been changed! Caution, Virus!"
        ENDIF

See Also: DISKCHECK() SETSHARE()

Tools — Disk Utilities

Posted on by vivaclipper 
Introduction Disk Utilities
DELETEFILE() Deletes an error-tolerant file
DIRCHANGE()  Changes the current directory
DIRMAKE()    Creates a directory
DIRNAME()    Determines the name of the current directory
DIRREMOVE()  Removes a directory
DISKCHANGE() Changes the current disk drive
DISKCHECK()  Creates a checksum for a disk
DISKFORMAT() Formats disks, controlled through a UDF
DISKFREE()   Determines the space available on a floppy or hard disk
DISKNAME()   Determines the drive designator for the current drive
DISKREADY()  Tests to see if a disk drive is ready
DISKREADYW() Queries whether you can write to a drive
DISKSPEED()  Determines a comparison value for the drive speed
DISKSTAT()   Determines the status of a drive.
DISKTOTAL()  Determines the total capacity of a floppy or hard disk
DISKTYPE()   Determines the type of data carrier
DRIVETYPE()  Determines the drive type
FILEAPPEND() Appends data to a file
FILEATTR()   Determines a file's attributes
FILECCLOSE() Closes a file after backup mode
FILECCONT()  Copies sections of a file in backup mode
FILECDATI()  Determines which date the target file contains with FILECOPY()
FILECHECK()  Calculates/computes/determines a checksum for a file
FILECOPEN()  Tests to see if the file is still open in the backup mode
FILECOPY()   Copies files normally or in backup mode
FILEDATE()   Determines the file date
FILEDELETE() Deletes file(s) by name and attribute
FILEMOVE()   Moves files to another directory
FILESEEK()   Searches for files by name and attribute
FILESIZE()   Determines the size of a file
FILESTR()    Reads a portion of a file into a string
FILETIME()   Determines a file's time
FILEVALID()  Tests whether a string has a valid file name
FLOPPYTYPE() Determines the exact type of floppy drive
GETSHARE()   Determines the file open (share) mode
NUMDISKF()   Determines the number of installed disk drives
NUMDISKH()   Determines the number of hard disks
NUMDISKL()   Determines the number of available logical drives
RENAMEFILE() Fault tolerant renaming of a file.
RESTFSEEK()  Restores the FILESEEK environment
SAVEFSEEK()  Saves the current FILESEEK environment
SETFATTR()   Sets a file's attributes
SETFCREATE() Default attribute for creating with CA-Clipper Tools functions
SETFDATI()   Sets the date and time of a file
SETSHARE()   Sets default opening mode for CA-Clipper Tools file functions
STRFILE()    Writes a string to a file
TEMPFILE()   Creates a file for temporary use
TRUENAME()   Standardizes the path designation
VOLSERIAL()  Determines the DOS disk serial number
VOLUME()     Establishes a volume label for a floppy or hard disk