find command with complex logic Post: 302387170

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Top Forums Shell Programming and Scripting find command with complex logic Post 302387170 by alister on Thursday 14th of January 2010 05:54:45 PM

01-14-2010

Registered User

Quote:

Originally Posted by MaureenT

That's great and clearly cleaner than the round about way that I was trying to do it. I guess it's time to stop putting off learning awk and sed.

ls -r | awk -F. '{a=$1$2$3$4} b!=a {b=a;i++} i>2

I get that awk is splitting the name using the period with -F and grabbing the first 4 sections separated by a period ($1$2$3$4). Then you want b to be everything but a. Just need to understand this piece {b=a;i++} .
Guess I better find a good book on awk and sed.

I apologize for having edited my code after you saw it (at the time, i still had not seen this response).

The code extracts the current filename's build number into the variable a and compares it against the build number of the previous filename which is stored in b. If they are the same, nothing happens. If they are different, the current build number becomes the previous build number and i is incremented. i is the total number of build numbers encountered. when i exceeds 2, it starts printing the lines encountered (these are the directory names to be removed using xargs).

Cheers,
alister

alister

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LEARN ABOUT DEBIAN

calendarserver_purge_events

CALENDARSERVER_PURGE_EVENTS(8)				    BSD System Manager's Manual 			    CALENDARSERVER_PURGE_EVENTS(8)

NAME

     calendarserver_purge_events -- Darwin Calendar Server event clean-up utility

SYNOPSIS

     calendarserver_purge_events [--config file] [--days number] [--dry-run] [--verbose] [--help]

DESCRIPTION

     calendarserver_purge_events is a tool for removing old events from the calendar server.  By default, events older than 365 days are removed,
     but the user can specify the number of days in the past to use as a cut-off.  Repeating events that have any occurrences after the cut-off
     day are not removed.

     calendarserver_purge_events should be run as a user with the same priviledges as the Calendar Server itself, as it needs to read and write
     data that belongs to the server.

OPTIONS

     -h, --help
	   Display usage information

     -f, --config FILE
	   Use the Calendar Server configuration specified in the given file.  Defaults to /etc/caldavd/caldavd.plist.

     -d, --days NUMBER
	   Specify how many days in the past to retain.  Defaults to 365 days.

     -n, --dry-run
	   Calculate and display how many events would be removed, but don't actually remove them.

     -v, --verbose
	   Print progress information.

FILES

     /etc/caldavd/caldavd.plist
	   The Calendar Server configuration file.

SEE ALSO

     caldavd(8)

BSD
								   June 17, 2009							       BSD