08-10-2011
Hi Zaxxon,
Thanks for the explanation.
the input file looks like this.
Header20110729 02:36 |
11100000034ATC 00000 MGR0000000000 05177555633051775556IIGRN 0386473260HTR06019960802 JGXA8319991102C874277 HT100019981112C967021 1994101119890813IQ01122 CPS D064134 00010101038647326020040204D064134 |
11100000065ABC 00000 0000000000 00842891166008428911K9DRN 268440207 959K9D20000720FCP2BU08959VAI19980331IV04279 90000119940530 1970010119700101CPSBATCHFLEX C820377 XXXX00010101345811 19951125 |
9#EOF# 0000000000000501168 |
I am little confused with the explanation:
"$2=sprintf("%020d", NR-2) _____ Currently $2 of $0 ie. field 2 of the current (last) line has the value we want to change. So we alter field 2 by printing out the number of lines -2 (lines in awk are called
Records and
N stands for number, so
NR means
Number of
Records) because we want to subtract the header and the footer line"
I want to modify the last line itself.. so is it going to do the last line or last but one ?
thanks in advance.
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LEARN ABOUT DEBIAN
tcfmgr
TCFMGR(1) Tokyo Cabinet TCFMGR(1)
NAME
tcfmgr - the command line utility of the fixed-length database API
DESCRIPTION
The command `tcfmgr' is a utility for test and debugging of the fixed-length database API and its applications. `path' specifies the path
of a database file. `width' specifies the width of the value of each record. `limsiz' specifies the limit size of the database file.
`key' specifies the key of a record. `value' specifies the value of a record. `file' specifies the input file.
tcfmgr create path [width [limsiz]]
Create a database file.
tcfmgr inform [-nl|-nb] path
Print miscellaneous information to the standard output.
tcfmgr put [-nl|-nb] [-sx] [-dk|-dc|-dai|-dad] path key value
Store a record.
tcfmgr out [-nl|-nb] [-sx] path key
Remove a record.
tcfmgr get [-nl|-nb] [-sx] [-px] [-pz] path key
Print the value of a record.
tcfmgr list [-nl|-nb] [-m num] [-pv] [-px] [-rb lkey ukey] [-ri str] path
Print keys of all records, separated by line feeds.
tcfmgr optimize [-nl|-nb] path [width [limsiz]]
Optimize a database file.
tcfmgr importtsv [-nl|-nb] [-sc] path [file]
Store records of TSV in each line of a file.
tcfmgr version
Print the version information of Tokyo Cabinet.
Options feature the following.
-nl : enable the option `FDBNOLCK'.
-nb : enable the option `FDBLCKNB'.
-sx : the input data is evaluated as a hexadecimal data string.
-dk : use the function `tcfdbputkeep' instead of `tcfdbput'.
-dc : use the function `tcfdbputcat' instead of `tcfdbput'.
-dai : use the function `tcfdbaddint' instead of `tcfdbput'.
-dad : use the function `tcfdbadddouble' instead of `tcfdbput'.
-px : the output data is converted into a hexadecimal data string.
-pz : do not append line feed at the end of the output.
-m num : specify the maximum number of the output.
-pv : print values of records also.
-rb lkey ukey : specify the range of keys.
-ri str : specify the interval notation of keys.
-sc : normalize keys as lower cases.
This command returns 0 on success, another on failure.
SEE ALSO
tcftest(1), tcfmttest(1), tcfdb(3), tokyocabinet(3)
Man Page 2011-02-12 TCFMGR(1)