02-06-2008
subtotal columns
Hello
I have a file that has two (or more) different types of records I want to total. How would I do this using awk?
The file may contain several dozen records. The records are sorted on the database column - what I want to do is get the amount of space that each table has in that database and, add that amount to a variable. When the database changes, I want to print out that subtotal, reset the variable to zero and process the rest of the file.
I've seen examples where awk will total the ENTIRE column but, I need to create subtotals for each database when it changes (2,3,4,maybe more). I'm thinking awk would be the most effective way to go with this; is there something else that I could use? Any help would be greatly appreciated.
Thanks
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LEARN ABOUT NETBSD
cap_mkdb
CAP_MKDB(1) BSD General Commands Manual CAP_MKDB(1)
NAME
cap_mkdb -- create capability database
SYNOPSIS
cap_mkdb [-b | -l] [-v] [-f outfile] file1 [file2 ...]
DESCRIPTION
cap_mkdb builds a hashed database out of the getcap(3) logical database constructed by the concatenation of the specified files.
The database is named by the basename of the first file argument and the string ``.db''. The getcap(3) routines can access the database in
this form much more quickly than they can the original text file(s).
The ``tc'' capabilities of the records are expanded before the record is stored into the database.
The options are as follows:
-b Use big-endian byte order for database metadata.
-f outfile
Specify a different database basename.
-l Use little-endian byte order for database metadata.
-v Print out the number of capability records in the database.
The -b and the -l flags are mutually exclusive. The default byte ordering is the current host order.
FORMAT
The following is a description of the hashed database created by cap_mkdb. For a description of the format of the input files see
termcap(5).
Each record is stored in the database using two different types of keys.
The first type is a key which consists of the first capability of the record (not including the trailing colon (``:'')) with a data field
consisting of a special byte followed by the rest of the record. The special byte is either a 0 or 1, where a 0 means that the record is
okay, and a 1 means that there was a ``tc'' capability in the record that couldn't be expanded.
The second type is a key which consists of one of the names from the first capability of the record with a data field consisting a special
byte followed by the first capability of the record. The special byte is a 2.
In normal operation names are looked up in the database, resulting in a key/data pair of the second type. The data field of this key/data
pair is used to look up a key/data pair of the first type which has the real data associated with the name.
EXIT STATUS
The cap_mkdb utility exits 0 on success and >0 if an error occurs.
SEE ALSO
dbopen(3), getcap(3), termcap(5)
BSD
June 6, 1993 BSD