LinuxQuestions.org - Check for invalid date

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Blackout_08

06-07-2006 06:27 PM

Check for invalid date

ok im trying to figure out how to determine if a date YYYYMMDD is invalid without checking if YYYY is greater than 0, MM is greater than 0 and less than 12, and DD is greater than 0 and less then 31/30/29/28. Any ideas?

graemef

06-07-2006 07:30 PM

Which language are you using? Some have builtin function to do that sort of work for you.

Blackout_08

06-07-2006 07:36 PM

/bin/bash is used

jim mcnamara

06-07-2006 08:28 PM

try

Code:

touch -t $DATE  dummy_file

if [ $? -ne 0 ] ; then

  echo "Invalid date"

fi

If you try to use an invalid date touch will return a non-zero value

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