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Top Forums Shell Programming and Scripting Shell quiz: implement a mutex Post 302318328 by colemar on Thursday 21st of May 2009 10:14:00 AM
Old 05-21-2009
Quote:
Originally Posted by vgersh99
I like using 'fuser' - making sure there's only ONE pid 'locking' the script.
I like using fuser too, but:
  • it works only when the processes to serialize are instances of the exact same script file
  • it is not very portable
  • as you said, any process reading the script file would block all the script instances (perhaps forever)
On the plus side, the lock is automatically removed when the process ends or is terminated in any way.
 

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CPANPLUS::Shell(3pm)					 Perl Programmers Reference Guide				      CPANPLUS::Shell(3pm)

NAME
CPANPLUS::Shell SYNOPSIS
use CPANPLUS::Shell; # load the shell indicated by your # config -- defaults to # CPANPLUS::Shell::Default use CPANPLUS::Shell qw[Classic] # load CPANPLUS::Shell::Classic; my $ui = CPANPLUS::Shell->new(); my $name = $ui->which; # Find out what shell you loaded $ui->shell; # run the ui shell DESCRIPTION
This module is the generic loading (and base class) for all "CPANPLUS" shells. Through this module you can load any installed "CPANPLUS" shell. Just about all the functionality is provided by the shell that you have loaded, and not by this class (which merely functions as a generic loading class), so please consult the documentation of your shell of choice. BUG REPORTS
Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>. AUTHOR
This module by Jos Boumans <kane@cpan.org>. COPYRIGHT
The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved. This library is free software; you may redistribute and/or modify it under the same terms as Perl itself. SEE ALSO
CPANPLUS::Shell::Default, CPANPLUS::Shell::Classic, cpanp perl v5.12.1 2010-04-26 CPANPLUS::Shell(3pm)
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