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Full Discussion: Any one can tell me how this happen?
Top Forums Programming Any one can tell me how this happen? Post 36439 by cbkihong on Thursday 29th of May 2003 02:20:22 AM
Old 05-29-2003
Although the process image is copied through fork(), the parent and child processes are already two distinct processes and no longer share the same process space, so the case is now like two text editor instances running concurrently. Unless you carry out some special synchronizations (say, through mechanisms of locking shared resources like semaphore or monitors) between these processes race condition should continue to exist.

Some processes appear to have ppid == 1 because the parent process has ended and is then collected by init, which has pid 1.

You can get more info on processes from any university textbooks on operating system design, such as "Operating System Concepts" that I have on my desk.
 

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LEARN ABOUT CENTOS

amanda-scripts

AMANDA-SCRIPTS(7)						    Miscellanea 						 AMANDA-SCRIPTS(7)

NAME

       amanda-scripts - Configuring and using the Script API

DESCRIPTION

       The Script API is a flexible system for invoking user-supplied scripts at various points in the execution of Amanda. This manual page
       describes the operation and configuration of the API. For help writing Script API scripts, see http://wiki.zmanda.com/index.php/Script_API.

SCRIPTS

       This section lists the scripts included with Amanda, see the individual man page for instructions on using them. For complete How-To
       information, consult the Amanda wiki at http://wiki.zmanda.com.

       o   amzfs-snapshot(8), - create/destroy zfs snapshot.

       o   script-email(8), - send email.

       Script properties work just like application properties: they are insensitive to case, and - (dash) and _ (underscore) may be used
       interchangeably.

SCRIPTS OUTPUT PROPERTY

       A pre-dle-amcheck, pre-dle-estimate or pre-dle-backup executed on the client can output property on stdout that are sent to the
       application. If the output line matches "PROPERTY str1 str2", Amanda sets a property called "str1" by the value of "str2", that property is
       sent to the application.

SEE ALSO

       amanda(8), amanda.conf(5)

       The Amanda Wiki: : http://wiki.zmanda.com/

AUTHORS

       Jean-Louis Martineau <martineau@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

       Dustin J. Mitchell <dustin@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

Amanda 3.3.3							    01/10/2013							 AMANDA-SCRIPTS(7)
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