Shell Script..plzz help Post: 302473820

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Top Forums Shell Programming and Scripting Shell Script..plzz help Post 302473820 by ctsgnb on Monday 22nd of November 2010 05:41:41 PM

11-22-2010

Registered User

1) Which OS do you run ?
2) So you want your script to take 2 input arguments in format YYYYMMDD, and then, for every day in between these date, it check whether it can find an existing file with the concerned day in a directory that have a corresponding name, so the file should have the generic form :
./YYYYMMDD/<any_number>__*(text)_YYYYMMDD.txt file
???

Code:

$ ksh myd 20101117
file missing for date 20101117
file missing for date 20101118
file missing for date 20101119
file missing for date 20101120
file missing for date 20101121
file missing for date 20101122
$ mkdir 20101120
$ touch ./20101120/whatevername_20101120.txt
$ ksh myd 20101117
file missing for date 20101117
file missing for date 20101118
file missing for date 20101119
file missing for date 20101121
file missing for date 20101122
$

also handle leap year

Code:

$ ksh myd 19880226 19880302
file missing for date 19880226
file missing for date 19880227
file missing for date 19880228
file missing for date 19880229
file missing for date 19880301
file missing for date 19880302
$

Or here is a better version that includes runtime improvement :
Scanning from 20090101 to 20101122 came from :
Basically :

Code:

real    1m36.595s
user    0m12.428s
sys     0m48.939s

After adding just the single + 8870 iteration saving it decreased to :

Code:

real    0m27.938s
user    0m2.862s
sys     0m10.471s

And using built-in variable and +70 and +71 iteration saving we finally come to the runtime:

Code:

real    0m5.177s
user    0m1.083s
sys     0m3.152s

Here is the code (feel free to use and adapt to your needs)
For your information, i tested it on

Code:

FreeBSD <anonymized> 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Sun  Jul 25 16:41:25 MDT 2010     <anonymized> amd64

as well as

Code:

SunOS <anonymized> 5.10 Generic_141414-01 sun4u sparc SUNW,Sun-Fire-V490

Code:

#!/usr/bin/ksh

usage(){
echo "Usage : $0 {date_min} {date_max}     those dates must be YYYYMMDD formated"
exit 1
}

chk_date(){
typeset -i m d
y="${1%????}" ; t="${1%??}" ; m="${t#$y}" ; d="${1#??????}"
cal $m $y 2>/dev/null | tail +3 | sed -e 'N;N;N;N;N;s/\n/ /g' | grep " $d" >/dev/null 2>&1 && return 0 || return 1
}

min=${1:-20100101}
max=${2:-$(date '+%Y%m%d')}

eval chk_date $min || usage
eval chk_date $max || usage

while [[ $min -le $max ]]
do
    eval chk_date $min && echo $min

case ${min#????} in
@(0[13578]|10)31) min=$(( $min + 70)) ;;
@(0[2469]|11)30) min=$(( $min + 71 )) ;;
1231) min=$(( $min + 8870 )) ;;
*) min=$(( $min + 1 )) ;;
esac

done | while read n
do
     ( ls ./$n/*_$n.txt >/dev/null 2>&1 ) || echo "file missing for date $n"
done

Last edited by ctsgnb; 11-23-2010 at 12:56 PM..

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