Commodore PC 20 - Page 190

152 MS-DOS User's Reference
Diskcopy exit codes
Copying a disk
Diskcopy figures out the number of sides to copy, based on the
source drive and disk.
When correctly written programs exit back to MS-DOS, they return
an exit code: 0 if no error occurred, or a value greater than zero
if there was a problem_ This exit code can be tested in batch files,
and it allows batch programmers
to "branch" to an error-handling
routine in the batch file_
o
2
3
4
Copied successfully
Non-fatal readlwrite
error
An unrecoverable but non-fatal read or write error
occurred_
CONTROL-C error
The user entered CONTROL-C to terminate diskcopy_
Fatal hard
error
Diskcopy was unable to read the source disk or format
the target disk.
Initialization
error
There is not enough memory - invalid drives or com-
mand line syntax_
You can use
the batch processing if command to perform error
processing based on the errorlevel returned by diskcopy_
Example:
To copy the disk in drive A to the disk in drive B, use the follow-
ing command:
diskcopy a: b:
Diskcopy prompts you to insert both disks and press any key to L
begin copying_