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Full Discussion: How UNIX/AIX handles a file deep down, say it's being read while another one tries to rename it?
Top Forums UNIX for Advanced & Expert Users How UNIX/AIX handles a file deep down, say it's being read while another one tries to rename it? Post 302384531 by TonyFullerMalv on Tuesday 5th of January 2010 03:34:41 PM
Old 01-05-2010
If each log file entry has a date stamp alongside it then the monitoring process could keep track of the alerts it has already seen and then it could look at the tail end of XXX.log.0 as well as the contents of XXX.log?

The better solution would be for the monitoring software to roll the log files it is looking at so that it can do the log file rolling directly after checking the log file.

Another way round it is that the code rolling the log files does this:
Code:
mv XXX.log XXX.log.0
tail -3 XXX.log.0 >> XXX.log

So that the tail end of XXX.log.0 is retained in XXX.log, this would cause log file entries to be in more than one file. I suggested appending the tail end of XXX.log.0 onto XXX.log just in case some new entries have already been put into XXX.log.
 

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LEARN ABOUT OPENSOLARIS

gvfs-monitor-file

gvfs-monitor-file(1)						   User Commands					      gvfs-monitor-file(1)

NAME

       gvfs-monitor-file - monitor the change of a file using the VFS system

SYNOPSIS

       gvfs-monitor-file URI

DESCRIPTION

       gvfs-monitor-file monitors the change of a file using the VFS system.

OPERANDS

       The following operands are supported:

       URI	Specifies the file location in standard URI format.

EXAMPLES

       Example 1: Monitor a local file

       example% gvfs-monitor-file file:///tmp/example

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables: NLSPATH.

EXIT STATUS

       The exit value 0 is returned regardless of success or failure.

FILES

       The following files are used by this application:

       /usr/bin/gvfs-monitor-file      Executable to monitor the change of a file using the VFS system.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-gvfs		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Volatile			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gvfs-copy(1),  gvfs-info(1),  gvfs-less(1),  gvfs-ls(1), gvfs-mkdir(1) gvfs-monitor-dir(1), gvfs-cat(1), gvfs-mount(1), gvfs-move(1), gvfs-
       rename(1), gvfs-open(1), gvfs-rm(1), gvfs-save(1), gvfs-trash(1), gvfs-tree(1), attributes(5), environ(5)

NOTES

       Written by Alvaro Lopez Ortega, Sun Microsystems Inc., 2008.

SunOS 5.11							    25 Mar 2008 					      gvfs-monitor-file(1)
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