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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
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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: 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
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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. 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
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The system responds with the following message:
EOF FOUND IN FROMFILE AFTER RECORD 19
20 RECORDS PROCESSED * * * 0 ERRORS
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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
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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]]
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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
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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
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