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Full Discussion: finding date numeral from file and check the validity of date format
Top Forums Shell Programming and Scripting finding date numeral from file and check the validity of date format Post 302574318 by manas_ranjan on Thursday 17th of November 2011 05:23:02 AM
Old 11-17-2011
finding date numeral from file and check the validity of date format
hi there

I have file names in different format as below

Code:
triss_20111117_fxcb.csv
triss_fxcb_20111117.csv
xpnl_hypo_reu_miplvdone_11172011.csv
xpnl_hypo_reu_miplvdone_11-17-2011.csv
xpnl_hypo_reu_miplvdone_20111117.csv
xpnl_hypo_reu_miplvdone_20111117xfb.csv
triss_fxcb_20111117.csv.checksum

Now my this little piece of awk will give me only date from that file name

Code:
echo $name | awk -F"_" '{  for(i=1;i<=NF;++i) if($i ~ /[[:digit:]]/) print $i}'

if name is triss_20111117_fxcb.csv then o/p 20111117 which is perfect
if name is xpnl_hypo_reu_miplvdone_11-17-2011.csv then o/p is 11-17-2011.csv which is not perfect as .csv
if name is xpnl_hypo_reu_miplvdone_20111117xfb.csv then o/p is 20111117xfb.csv
if name is triss_fxcb_20111117.csv.checksum then o/p is 20111117.csv.checksum

question is how to remove .csv or any charcter from the o/p as I only need the date from the filename ?

and once I have the date in format like
Code:
YYYYMMDD,DDMMYYYY,MMDDYYYY or YYYY-MM-DD

how can i validate these date format are valid date. date can be in any of above form.
e.g.
11-17-2011
20111117
11172011
 

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csv2rec

CSV2REC(1)							   User Commands							CSV2REC(1)

NAME

       csv2rec - csv to rec converter

SYNOPSIS

       csv2rec [OPTIONS]... [CSV_FILE]

DESCRIPTION

       Convert csv data into rec data.

       -t, --type=TYPE
	      type name for the converted records; if this parameter is ommited then no type is used.

       -s, --strict
	      be strict parsing the csv file.

       -e, --omit-empty
	      omit empty fields.

       --help print a help message and exit.

       --version
	      show version and exit.

AUTHOR

       Written by Jose E. Marchesi.

REPORTING BUGS

       Report bugs to: bug-recutils@gnu.org
       GNU recutils home page: <http://www.gnu.org/software/recutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2010, 2011, 2012 Jose E. Marchesi.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for  csv2rec  is maintained as a Texinfo manual.  If the info and csv2rec programs are properly installed at your
       site, the command

	      info csv2rec

       should give you access to the complete manual.

csv2rec 1.4.93							   January 2012 							CSV2REC(1)
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