01-15-2011
I-node and sessions
I have a program (written by me, for educational purposes) called "analyzer".
The program takes a parameter, a filename, and does some statistics on it (for example, word's number, line's number, ... ) at regular intervals.
My teacher told me that if the file is edited while the "analyzer" is on, the program may not be aware of the changes, because some editors using x-server (as gedit) create a new i-node and a new session for the file, different from the i-node the "analyzer" is using.
Can someone explain this step, please?
Thank you in advance for your attention.
P.S. I'm sorry if my English is not accurate.
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LEARN ABOUT DEBIAN
ng_hole
NG_HOLE(4) BSD Kernel Interfaces Manual NG_HOLE(4)
NAME
ng_hole -- netgraph discard node type
SYNOPSIS
#include <sys/types.h>
#include <netgraph/ng_hole.h>
DESCRIPTION
The hole node type silently discards all data and control messages it receives. This type is used for testing and debugging.
HOOKS
A ng_hole node accepts any request to connect, regardless of the hook name, as long as the name is unique.
CONTROL MESSAGES
This node type supports the generic control messages, plus the following:
NGM_HOLE_GET_STATS
This command takes an ASCII string argument, the hook name, and returns the statistics associated with the hook as a struct
ng_hole_hookstat.
NGM_HOLE_CLR_STATS
This command takes an ASCII string argument, the hook name, and clears the statistics associated with the hook.
NGM_HOLE_GETCLR_STATS
This command is identical to NGM_HOLE_GET_STATS, except that the statistics are also atomically cleared.
SHUTDOWN
This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when all hooks have been disconnected.
SEE ALSO
netgraph(4), ng_echo(4), ngctl(8)
HISTORY
The ng_hole node type was implemented in FreeBSD 4.0.
AUTHORS
Julian Elischer <julian@FreeBSD.org>
BSD
May 19, 2004 BSD