I am validating the date in Unix shell script as follow:
CheckDate="2010-04-09"
regex="[1-9][0-9][0-9][0-9]-[0-9][0-9]-[0-3][0-9]"
if [[ $CheckDate = *@$regex ]]
then
echo "ok"
else
echo "not ok"
fi
But ksh it is giving output as not okay.. pls help.. i want output as ok
Here is my little script (written in Solaris 10, nawk is mandatory... sorry...). I know if you try to trick it by sending an alphanumeric you get an error on the let statements. Not perfect, but it gets you there...
#!/usr/bin/ksh
# checks for "-" or "/" separated 3 field parameter...
if [[ `echo $1 | nawk -F"/|-" '{print NF}'` -ne 3 ]]
then
echo "invalid date!!!"
exit 1
fi
# typeset trickery...
typeset -Z4 YEAR
typeset -Z2 MONTH
typeset -Z2 DATE
let YEAR=`echo $1 | nawk -F"/|-" '{print $3}'`
let MONTH=`echo $1 | nawk -F"/|-" '{print $1}'`
let DATE=`echo $1 | nawk -F"/|-" '{print $2}'`
let DATE2=`echo $1 | nawk -F"/|-" '{print $2}'`
# validating the year
# if the year passed contains letters or is "0" the year is invalid...
if [[ $YEAR -eq 0 ]]
then
echo "Invalid year!!!"
exit 2
fi
# validating the month
if [[ $MONTH -eq 0 || $MONTH -gt 12 ]]
then
echo "Invalid month!"
exit 3
fi
# Validating the date
if [[ $DATE -eq 0 ]]
then
echo "Invalid date!"
exit 4
else
CAL_CHECK=`cal $MONTH $YEAR | grep $DATE2 > /dev/null 2>&1 ; echo $?`
if [[ $CAL_CHECK -ne 0 ]]
then
echo "invalid date!!!"
exit 5
else
echo "VALID DATE!!!"
fi
fi
You can try this and manipulate
echo "04/09/2010" | awk -F '/' '{ print ($1 <= 04 && $2 <= 09 && match($3, /^[0-9][0-9][0-9][0-9]$/)) ? "good" : "bad" }'
echo "2010/04/09" | awk -F '/' '{ print ( match($1, /^[0-9][0-9][0-9][0-9]$/) && $2 <= 04 && $3 <= 09 ) ? "good" : "bad" }'
Please find the below code works as your exception.
export checkdate="2010-04-09"
echo ${checkdate} | grep '^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$'
if [ $? -eq 0 ]; then
echo "Date is valid"
else
echo "Date is not valid"
fi
