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Top Forums Shell Programming and Scripting format date/time presentation Post 20058 by Perderabo on Friday 19th of April 2002 01:34:05 PM
Old 04-19-2002
The sed command put a space after every two characters, this is how I split the fields up so that I could then read them into seperate variables.

Hmmm...now that I look at it, the hr thing may need some help. First hr holds the hours and if the hr is less than 12, it fine the way it is. But if hr was 13, we need it to be set to 1. And if it is 14, we want 2. This is so we can move from a 24 hour clock to a 12 hour clock. The % operator does this. It is a integer divide, but the result is the remainder, not the quotient. So 14 % 2 means we divide 14 by 12 and we want the remainder which is 2.

The problem that I now see is that if hour is zero, we may want to set it to twelve. This kinda depends on your local customs and whatnot, but this is how my watch works. We can do that with:

((hr=hr%12)) || hr=12

The || does the second command only if the first command fails. And a ((...)) that results in a zero is treated as if it failed. I just love stuff like this.

The set command established an array of 12 elements, one for each month. But the index runs from zero to 11. So I had to subtract 1 from the mo variable to get the proper index. So that expression just pulls out the proper element from the array.
 

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rotatelogs(8)						      System Manager's Manual						     rotatelogs(8)

NAME
rotatelogs - rotate Apache logs without having to kill the server SYNOPSIS
rotatelogs logfile rotationtime [offset] DESCRIPTION
rotatelogs is a simple program for use in conjunction with Apache's piped logfile feature, which can be used like this: CustomLog "|bin/rotatelogs /var/logs/logfile 86400" common This creates the files /var/logs/logfile.nnnn where nnnn is the system time at which the log nominally starts (this time will always be a multiple of the rotation time, so you can synchronize cron scripts with it). At the end of each rotation time (here after 24 hours) a new log is started. OPTIONS
logfile The path plus basename of the logfile. If logfile includes any Otherwise, the suffix .nnnnnnnnnn is automatically added and is the time in seconds. Both formats compute the start time from the beginning of the current period. rotationtime The rotation time in seconds. offset The number of minutes offset from UTC. If omitted, zero is assumed and UTC is used. For example, to use local time in the zone UTC -5 hours, specify a value of -300 for this argument. PORTABILITY
The following logfile format string substitutions should be supported by all strftime(3) implementations, see the strftime(3) man page for library-specific extensions. %A full weekday name (localized) %a 3-character weekday name (localized) %B full month name (localized) %b 3-character month name (localized) %c date and time (localized) %d 2-digit day of month %H 2-digit hour (24 hour clock) %I 2-digit hour (12 hour clock) %j 3-digit day of year %M 2-digit minute %m 2-digit month %p am/pm of 12 hour clock (localized) %S 2-digit second %U 2-digit week of year (Sunday first day of week) %W 2-digit week of year (Monday first day of week) %w 1-digit weekday (Sunday first day of week) %X time (localized) %x date (localized) %Y 4-digit year %y 2-digit year %Z time zone name %% literal `%' SEE ALSO
httpd(8) March 2001 rotatelogs(8)
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