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Check if time format is valid

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# 1  
Old 10-20-2015
Check if time format is valid
How can I validate if time (HH:MM:SS) argument is valid? I got this from web but I can't modify it to exit the script if the time argument is invalid.

Code:
echo $1 | awk -F ':' '{ print ($1 <= 23 && $2 <= 59 && $3 <= 59) ? "good" : "bad" }'

ex:
./script.ksh 12:34:21 = okay
./script.ksh 26:67:92 = invalid/exit script
# 2  
Old 10-20-2015
Hello erin00,

Could you please try following and let me know if this helps.
Code:
cat script.ksh
echo $1 | awk -F ':' '{match($0,/[0-2][0-4]:[0-5][0-9]:[0-5][0-9]/);A=substr($0,RSTART,RLENGTH);if(A  && $1 !~ /24/){ print "good"}  else {print "bad" }}'

After running script above following will be the output.
Code:
./script.ksh 12:34:21
good
./scrpit.ksh 26:67:92
bad
./script.ksh 24:17:12
bad

You could use string Invalid in place of bad which I have used above. Also on a Solaris/SunOS system, change awkto /usr/xpg4/bin/awk , /usr/xpg6/bin/awk , or nawk.

Thanks,
R. Singh
Last edited by RavinderSingh13; 10-20-2015 at 04:36 AM..
# 3  
Old 10-20-2015
This works the same as the code above, but how can I exit the script if the time is invalid
# 4  
Old 10-20-2015
Try this pure shell approach:
Code:
B=(${1//:/ })
[ ${B[0]} -le 23 -a ${B[1]} -le 59 -a ${B[2]} -le 59 ] && echo good || echo bad

---------- Post updated at 09:55 ---------- Previous update was at 09:54 ----------

Use exit instead of echo bad.
# 5  
Old 10-20-2015
this ain't working.
Code:
`(' is not expected.

# 6  
Old 10-20-2015
Quote:
Originally Posted by erin00
This works the same as the code above, but how can I exit the script if the time is invalid
Hello erin00,

Could you please try following and let me know if this helps.
Code:
cat script.ksh
echo $1 | awk -F ':' '{match($0,/[0-2][0-4]:[0-5][0-9]:[0-5][0-9]/);A=substr($0,RSTART,RLENGTH);if(A && $1 !~ /24/){ print "good";exit 0}  else {print "bad";exit 1;}}'
if [[ $? == 0 ]]
then
     echo "we passed GOOD time test"
else
     exit;
fi

When I run the script with different arguments to check it's functionality it give following output then.
Code:
./script.ksh 24:17:12
bad
./script.ksh 23:17:12
good
we passed GOOD time test

Similarly you could change it according to your need like in spite of printing lines which I did after checking $? status, where $? will check the exit status for last command.

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
erin00
# 7  
Old 10-20-2015
Quote:
Originally Posted by RavinderSingh13
Hello erin00,

Could you please try following and let me know if this helps.
Code:
cat script.ksh
echo $1 | awk -F ':' '{match($0,/[0-2][0-4]:[0-5][0-9]:[0-5][0-9]/);A=substr($0,RSTART,RLENGTH);if(A && $1 !~ /24/){ print "good";exit 0}  else {print "bad";exit 1;}}'
if [[ $? == 0 ]]
then
     echo "we passed GOOD time test"
else
     exit;
fi

When I run the script with different arguments to check it's functionality it give following output then.
Code:
./script.ksh 24:17:12
bad
./script.ksh 23:17:12
good
we passed GOOD time test

Similarly you could change it according to your need like in spite of printing lines which I did after checking $? status, where $? will check the exit status for last command.

Thanks,
R. Singh
Well, this is great, but it does'nt allow times like 19:00:00 (because of
Code:
[0-2][0-4]

.
Last edited by erin00; 10-20-2015 at 09:18 AM..
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