02-07-2019
Hi Rakesh,
You say that the letter M at the end of each input line is special and has to be removed. The letter M can't be removed if you say it is not special. We can't possibly meet your requirements if your requirements are inconsistent.
If you want to change your requirements to only remove sequences of characters that are not a space character and that are not alphanumeric characters from the end of each input line, the output produced from your sample input will be identical to the input because the last character is an alphanumeric character!
You had several suggestions earlier that, among many other things, removed all non-alphanumeric characters from the end of field 15 or from the end of the input record and you rejected all of them because they didn't get rid of trailing M.
I give up!
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CAP_MKDB(1) BSD General Commands Manual CAP_MKDB(1)
NAME
cap_mkdb -- create capability database
SYNOPSIS
cap_mkdb [-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 as as follows:
-f outfile
Specify a different database basename.
-v Print out the number of capability records in the database.
FORMAT
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 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.
RETURN VALUE
The cap_mkdb utility exits 0 on success and >0 if an error occurs.
SEE ALSO
dbopen(3), getcap(3), termcap(5)
BSD
June 2, 2019 BSD