awk and loop problem - Shell Programming and Scripting

invinzin21 · #1 02-04-2008

Good morning,
Sir's i would like to ask for help regarding to my awk and loop problem, a script that will check my files a and b then if it will see there was a time below 3am it will echo the file that contains below 3am file, for this example it will redirect the file a to an output.
$ cat a
Sun Feb 3 08:49:01 EAT 2008
Sun Feb 3 12:09:33 EAT 2008
Mon Feb 4 01:44:48 EAT 2008
Mon Feb 4 13:02:00 EAT 2008

$cat b
Sat Feb 2 08:14:34 EAT 2008
Sat Feb 2 09:55:36 EAT 2008
Sun Feb 3 08:44:13 EAT 2008
Sun Feb 3 09:46:38 EAT 2008
Mon Feb 4 07:43:09 EAT 2008
Mon Feb 4 09:41:24 EAT 2008

desired output:
file a has below 3 am.

Thanks

Ygor · #2 02-04-2008

Try...

Code:

awk -F '[ :]' '$4+0<n{printf "File %s below %s\n", FILENAME, n}' n=3 a b

blowtorch · #3 02-04-2008

Do you have to use awk here? This will work too:

Code:

while read one two three four rest; do 
   if [ ${four%%:*} -lt 3 ]; then 
      echo file a has below 3 am; 
      break; 
   fi; 
done < a
while read one two three four rest; do 
   if [ ${four%%:*} -lt 3 ]; then 
      echo file b has below 3 am; 
      break; 
   fi; 
done < b

If you have a lot of files, you can loop for each file too.

invinzin21 · #4 02-04-2008

great! thanks to all

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Problem in For Loop	The Observer	Shell Programming and Scripting	2	05-27-2008 11:43 PM
for loop problem	namishtiwari	Shell Programming and Scripting	5	01-25-2008 09:58 AM
loop problem	maskot	Shell Programming and Scripting	1	05-25-2007 01:10 AM
Problem with for loop/sed ?	chiru_h	Shell Programming and Scripting	2	08-27-2006 08:55 AM
problem with while loop	mridula	High Level Programming	1	12-11-2005 08:44 AM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode