HP 3000 Manuals HP 3000 Manuals
Copying Files
You can use FCOPY to create new files, append one or more files onto an
existing file, or extract portions from files.
New Disk Files
To create a new disk file as you copy information to it, use the NEW
function. For example,
>FROM=OLDDATA;TO=NEWDATA;NEW
In this example, the new file called NEWDATA has the default file
characteristics described in appendix B and exists in the current account
and group.
Appending Files
Often you need to string several files together. Use FCOPY to append a
file to another as follows:
1. Use the MPE FILE command to give the tofile append access
(ACC=APPEND), and set its limit large enough to hold the contents
of all the files you are appending to it.
For example,
>:FILE INFO3;REC=-80,10,F,ASCII;ACC=APPEND;DISC=500,2
Refer to the MPE File System Reference Manual (30000-90236) for
MPE V/E or the Accessing Files Programmers Guide (32650-90017) for
MPE XL for instructions on calculating the amount of file space
you would require.
2. Copy the first file you want to append to the tofile. Type
an asterisk in front of the tofile name to use the file
characteristics described in the preceding FILE command instead of
the default file characteristics. If the tofile is new, use the
NEW function. For example,
>FROM=INFO1;TO=*INFO3;NEW
The system responds with the following message:
EOF FOUND IN FROMFILE AFTER RECORD 19
20 RECORDS PROCESSED * * * 0 ERRORS
3. Copy any subsequent files in the order you want to append them.
Use an asterisk alone to reuse the tofile in the previous command.
For example,
>FROM=INFO2;TO=*
EOF FOUND IN FROMFILE AFTER RECORD 24
25 RECORDS PROCESSED * * * 0 ERRORS
Extracting Parts of Files
Use the SUBSET function to extract portions of a file. You can define a
subset as a set of continuous records or as a set of records with a
certain pattern of characters or numbers. For example, a file may
contain information about the employees in your company. Each record in
the file describes one employee, and the employee's last name begins in
column 1 of each record. To create a file containing all employees whose
last name begins with "S," copy the subset of the employee file that
contains the character "S" in column 1. To create a file containing all
employees whose last name is "Smith," copy the subset of the employee
file that contains the characters "Smith" beginning in column 1.
Defining Subsets
To copy a subset containing a particular character string from a file,
use the following form of the SUBSET function:
;SUBSET [="characterstring"[,[column]][,EXCLUDE]]
Substitute the series of characters that you want to match for
characterstring, and the beginning column number of the character string
for column. For example, the command below copies the subset of all
records with the characters "COLLEGE" beginning in column 40 from the
EMPRECS file to the GRADS file:
>FROM=EMPRECS;TO=GRADS;SUBSET="COLLEGE",40
EOF FOUND IN FROMFILE AFTER RECORD 5985
2859 RECORDS PROCESSED * * * 0 ERRORS
To copy a subset excluding specific records, use the EXCLUDE parameter.
For example, the command below copies all records in EMPRECS, except
those with the characters "COLLEGE" beginning in column 40, to the file
NONGRADS.
>FROM=EMPRECS;TO=NONGRADS;SUBSET="COLLEGE",40,EXCLUDE
EOF FOUND IN FROMFILE AFTER RECORD 5985
3127 RECORDS PROCESSED * * * 0 ERRORS