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Top Forums Shell Programming and Scripting To check timestamp in logfile and display lines upto 3 hours before current timestamp Post 302911349 by Don Cragun on Thursday 31st of July 2014 09:31:49 AM
Old 07-31-2014
If I'm reading MadeInGermany's code correctly, it is comparing YY/DD/MM HH:MM:SS instead of YY/MM/DD HH:MM:SS and is printing the more than 3 hours ago timestamps instead of the less than 3 hours old timestamps. As long as we're constructing strings to compare, I don't see the need to include the slashes in the dates and I'm also assuming that the minutes and seconds do have 2 digits with zero fill so I don't have to split the time fields (I just have to use leading 0 to fill an 8 character field to supply missing leading zeroes in the hour). And, I used FS instead of sub() and split() to split the date field.

I think RudiC left out a %S in the date format string, but on a 3 hour window, a difference of up to one minute might not be noticeable in the results.

I think this does what was requested (on systems where the date utility supports this form of -d option processing):
Code:
awk -v d="$(date "+%y%m%d%T" -d "3 hours ago")" -F '[[/ ]' '
/Exception/ {
        if(sprintf("%02d%02d%02d%08s", $4, $2, $3, $5) > d)
		printf("%s/%s/%s %s\n", $2, $3, $4, $5)
}' trial.txt

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sttime(3)						    ShapeTools Toolkit Library							 sttime(3)

NAME
stMktime, stWriteTime - date and time handling SYNOPSIS
#include <config.h> #include <sttk.h.h> time_tstMktime (char *string); char*stWriteTime (time_t date); DESCRIPTION
stMktime scans the given string and tries to read a date and time from it. It understands various formats of date strings. The following is a list of all valid formats, optional parts in brackets. [Tue] Jan 5[,] [19]93 This includes the standard asctime(3) format. Jan 5 With no year given, the year defaults to the current year. [19]93/01/05 This notation requires month and day represented by exactly two digits. 5.1.[19]93 This is the usual German notation. 5.1. German notation referencing the current year. A certain time, given together with the date must always have the following form. hours:minutes[:seconds] Each of the fields must be an integer value within the proper range (hours: 0-23, minutes and seconds: 0-59). Values below 10 may be written as one digit numbers. The time value may be placed anywhere in the date string: at the beginning, at the end, or somewhere in the middle. Any amount of white- space may be given between a field of the time value and the separating colon. The time is always considered to be local time. stWriteTime generates a time string similar to asctime(3) from its date argument. SEE ALSO
asctime(3) BUGS
Time Zone Names within the time string (like `MET') are not handled properly. In most cases they will cause a failure. sttk-1.7 Thu Jun 24 17:43:35 1993 sttime(3)
All times are GMT -4. The time now is 07:54 AM.
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