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Shell Programming and Scripting
Execution problems using awk command.
Post 302342818 by satishpv_2002 on Monday 10th of August 2009 11:05:59 PM
08-11-2009
Execution problems using awk command.
Hi All,
I have the following requirement. In a directory i get files from external source. I at regular intervals check that directory for any incoming files.
The file name is underscore delimited.
Such as:
aaa_bbb_ccc_ddd_eee_fff.dat
I am using awk and and splitting the file name.
But now we are getting files with an extra parameter too.
aaa_bbb_ccc_ddd_eee_fff_ggg.dat
so there may be a combination of files with diferent field counts. So i am unable to parse the file name coz i dont know the exact field count as it may change for different file names
.
I googled and i found out that optional parameters can be made use of in GAWK. But i need to know how to do it using awk. Any alternative apart from GAWK, awk(if not possible using awk) is also welcomed. Any help would be greatly appreciated.
I have the following requirement. In a directory i get files from external source. I at regular intervals check that directory for any incoming files.
The file name is underscore delimited.
Such as:
aaa_bbb_ccc_ddd_eee_fff.dat
I am using awk and and splitting the file name.
But now we are getting files with an extra parameter too.
aaa_bbb_ccc_ddd_eee_fff_ggg.dat
so there may be a combination of files with diferent field counts. So i am unable to parse the file name coz i dont know the exact field count as it may change for different file names
.I googled and i found out that optional parameters can be made use of in GAWK. But i need to know how to do it using awk. Any alternative apart from GAWK, awk(if not possible using awk) is also welcomed. Any help would be greatly appreciated.
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LEARN ABOUT DEBIAN
dpkg-awk
DPKG-AWK(1) General Commands Manual DPKG-AWK(1) NAME
dpkg-awk - Utility to read a dpkg style db file SYNOPSIS
dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> .. DESCRIPTION
dpkg-awk Parses a dpkg status file (or other similarly formatted file) and outputs the resulting records. It can use regex on the field values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields. OPTIONS
-f filename --file filename The file to parse. The default is /var/lib/dpkg/status. -d [#] --debug [#] Each time this is specified, it increased the debug level. -s field(s) --sort field(s) A space or comma separated list of fields to sort on. -n field(s) --numeric field(s) A space or comma separated list of fields that should be interpreted as numeric in value. -rs ?? --rec_sep ?? Output this string at the end of each output paragraph. -h --help Display some help. fieldname The fields from the file, that are matched with the regex given. The fieldnames are case insensitive. out_fieldname The fields from the file, that are output for each record. If the first field listed begins with ^, then the list of fields that follows will NOT be output. BUGS
Be warned that the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro- gram. This program comes with no warranties. If running this program causes fire and brimstone to rain down upon the earth, you will be on your own. This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg. AUTHOR
Adam Heath <doogie@debian.org> DEBIAN
Debian Utilities DPKG-AWK(1)