Cp & skipping exiting files Post: 302962865

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Top Forums Shell Programming and Scripting Cp & skipping exiting files Post 302962865 by Don Cragun on Saturday 19th of December 2015 06:05:21 PM

12-19-2015

Registered User

Sorry... I should have been much more verbose about the environment needed to use a hard link as a backup method.

I once worked in a group where a logging daemon was started when the system booted and ran forever to log errors that would occur. It opened the log files with something like:

Code:

        fd = open(logname, O_CREAT | O_WRONLY, S_IRUSR | S_IRGRP | S_IROTH);

(note that it is opening a file for writing with no write permissions on the file it creates).

If the open() failed with an EPERM error, it looked to see if another daemon is already running (and quietly exited if it was). Otherwise, it incremented that day's log sequence number and tried again.

At midnight, it closed the current log file, opened a new log file for the new day, hard linked any log files created the previous day to a backup directory, and removed any log files in the log directory that were more than a week old (leaving the link in the backup directory untouched).

Another process ran every few days archiving the log files in the backup directory to tape and removing log files more than three months old from the backup directory.

This scheme worked well for that project, but it assumes a lot about how the logs are created and used that is atypical for most loggers today.

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LEARN ABOUT DEBIAN

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.
	      Please notice this option isn't related to the terminal length as in a "80 culums terminal".

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do right to left (RTL) layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter and A4. Default is A4.

       Postscript points
	      Each postscript point equals to 1/72 of an inch. 36 points are 1/2 of an inch.

       --bottom-margin=bm
	      Set bottom margin. Default is 36 postscript points.

       --top-margin=tm
	      Set top margin. Default is 36 postscript points.

       --left-margin=lm
	      Set left margin. Default is 36 postscript points.

       --right-margin=rm
	      Set right margin. Default is 36 postscript points.

       --gutter-width=gw
	      Set gutter width. Default is 40 postscript points.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)

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