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finding date numeral from file and check the validity of date format

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Top Forums Shell Programming and Scripting finding date numeral from file and check the validity of date format
# 8  
Old 11-17-2011
Code:
echo $name | sed s/[a-z_.]//g

Moderator's Comments:
Mod Comment How to use code tags
Last edited by Franklin52; 11-17-2011 at 07:58 AM.. Reason: Please use code tags, thanks
# 9  
Old 11-17-2011
thanks but still
Code:
how to validate the date when o/p date can be in any format.
no static one .

is there any way to do so??

---------- Post updated at 06:34 AM ---------- Previous update was at 06:32 AM ----------

Quote:
Originally Posted by kondeti_satish
echo $name | sed s/[a-z_.]//g
excellent man.

---------- Post updated at 09:23 AM ---------- Previous update was at 06:34 AM ----------

if name=hvar_rgrpd_10d_hvams17_11-17-2011_kgr_prod.rec
Then none of the trick working .
can anyone come up with better idea to extarct the date field only ???
# 10  
Old 11-17-2011
Try this...
Code:
sed 's/.*\([0-9]\{2\}[- ]*[0-9]\{2\}[- ]*[0-9]\{4\}\).*/\1/g' input_file

--ahamed
# 11  
Old 11-18-2011
If gawk (GNU awk) is avaliable for you ( most linux distros ) , you can do the following:

Code:
# cat file
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
r_rgrpd_10d_hvams17_11-17-2011_kgr_prod.rec

Code:
# gawk 'match($0,/([0-9]+-*[0-9]+-*[0-9]+)/,a){print a[1]}' file
20111117
20111117
11172011
11-17-2011
20111117
20111117
20111117
11-17-2011

Then is easy to translate the perl code to awk:
Code:
#!/usr/bin/env ksh

# YYYYMMDD,DDMMYYYY,MMDDYYYY or YYYY-MM-DD

validaF ()
{
dateV="${1}"

echo "${dateV}"|gawk  '{
   if (match($0,/^((?:19|20)[0-9][0-9])-*(0[1-9]|1[012])-*(0[1-9]|[12][0-9]|3[01])$/,a)) {
      year=a[1]+0
      mon=a[3]+0
      day=a[4]+0
      }
   else if (match($0,/^(0[1-9]|[12][0-9]|3[01])(0[1-9]|1[012])((19|20)[0-9][0-9])$/,a)) {
      year=a[3]+0
      mon=a[2]+0
      day=a[1]+0
      }
   else if (match($0,/^(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01])((19|20)[0-9][0-9])$/,a)) {
      year=a[3]+0
      mon=a[1]+0
      day=a[2]+0
      }
   else {
       print "KO: "$0
       exit
     }

   if (day == 31 && (mon == 4 ||  mon == 6 || mon == 9 || mon == 11)) 
      print "KO: "$0 # 30 days months
   else if (day >= 30 && mon == 2) 
      print "KO: "$0 # Febrary never 30 o 31 
   else if (mon == 2 && day == 29 && ! (  year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)))
      print "KO: "$0 # Febrary  29 leap year
   else  
      print "Correct date !:" $0 
   }'

}


validaF 11082011
validaF 12312010
validaF 13312010
validaF 20110811
validaF 20110841
validaF 2012-02-29
validaF 20110229

Code:
# date.sh
Correct date !:11082011
Correct date !:12312010
KO: 13312010
Correct date !:13312010
Correct date !:20110811
KO: 20110841
Correct date !:20110841
Correct date !:2012-02-29
KO: 20110229
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