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Full Discussion: Knowing when a different program modifies a file
Top Forums UNIX for Dummies Questions & Answers Knowing when a different program modifies a file Post 302795185 by Don Cragun on Wednesday 17th of April 2013 11:34:33 AM
Old 04-17-2013
I'm guessing that you're really saying that new lines being written to the log file did not show up in your vi editing buffer until you closed vi and reloaded the file. It is extremely unlikely that anything stopped writing to a file because vi had that file open.

When you edit a file using vi (or ex or ed or emacs or any other editor) you load a copy of that file into a buffer. You edit the buffer; not the underlying file. If you want to see recent additions to the file while you are editing it, you need to reload the buffer from the file. In vi, the command to reload the buffer is :e. If you have changed the buffer and have not written the updates back to another file; you'll need to use :e!. If you change the file and write those changes back to the file while some other process is writing to it, whether the changes you made to the file or additions added by that other process or some combination of those changes and additions will appear in the file after you exit vi is unspecified.
 

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LEARN ABOUT CENTOS

gldepthmask

GLDEPTHMASK(3G) 						   OpenGL Manual						   GLDEPTHMASK(3G)

NAME

       glDepthMask - enable or disable writing into the depth buffer

C SPECIFICATION

       void glDepthMask(GLboolean flag);

PARAMETERS

       flag
	   Specifies whether the depth buffer is enabled for writing. If flag is GL_FALSE, depth buffer writing is disabled. Otherwise, it is
	   enabled. Initially, depth buffer writing is enabled.

DESCRIPTION

       glDepthMask specifies whether the depth buffer is enabled for writing. If flag is GL_FALSE, depth buffer writing is disabled. Otherwise, it
       is enabled. Initially, depth buffer writing is enabled.

ASSOCIATED GETS

       glGet() with argument GL_DEPTH_WRITEMASK

NOTES

       Even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled. In order to
       unconditionally write to the depth buffer, the depth test should be enabled and set to GL_ALWAYS (see glDepthFunc()).

SEE ALSO

       glColorMask(), glDepthFunc(), glDepthRange(), glStencilMask()

COPYRIGHT

       Copyright (C) 1991-2006 Silicon Graphics, Inc. Copyright (C) 2012 Khronos Group. This document is licensed under the SGI Free Software B
       License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014							   GLDEPTHMASK(3G)
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