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Top Forums Shell Programming and Scripting A script that spawns multiple instance of itself. Post 302492275 by homeboy on Sunday 30th of January 2011 09:46:44 PM
Old 01-30-2011
A script that spawns multiple instance of itself.

Hi all,I have some questions of forking new process,the code is below.Any help will be appreciated.
Code:
  1 #! /bin/bash
  2 
  3 PIDS=$(pidof sh $0)
  4 P_array=( $PIDS )
  5 echo $PIDS
  6 let "instances = ${#P_array[*]}-1"
  7 
  8 echo "$instances instance(s)" of this script running."
  9 echo "[Hit Ctl-C to exit.]";echo
 10 
 11 sleep 1
 12 sh $0

On line 3,in my opinion,it should recursive forever because sh execute the script again,the following will never be run,however,the code did exit if i omit the code below line 3.Second question,why subtract 1 on line 6?Thx.
 

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Bio::TreeIO::svggraph(3pm)				User Contributed Perl Documentation				Bio::TreeIO::svggraph(3pm)

NAME
Bio::TreeIO::svggraph - A simple output format that converts a Tree object to an SVG output SYNOPSIS
use Bio::TreeIO; my $in = Bio::TreeIO->new(-file => 'input', -format => 'newick'); my $out = Bio::TreeIO->new(-file => '>output', -format => 'svggraph'); while( my $tree = $in->next_tree ) { my $svg_xml = $out->write_tree($tree); } DESCRIPTION
This outputs a tree as an SVG graphic using the SVG::Graph API FEEDBACK
Mailing Lists User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to the Bioperl mailing list. Your participation is much appreciated. bioperl-l@bioperl.org - General discussion http://bioperl.org/wiki/Mailing_lists - About the mailing lists Support Please direct usage questions or support issues to the mailing list: bioperl-l@bioperl.org rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible. Reporting Bugs Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their resolution. Bug reports can be submitted via the web: https://redmine.open-bio.org/projects/bioperl/ AUTHOR - Brian OConnor Email brian.oconnor-at-excite.com CONTRIBUTORS
Allen Day Guillaume Rousse, Guillaume-dot-Rousse-at-inria-dot-fr APPENDIX
The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _ new Title : new Usage : my $obj = Bio::TreeIO::svggraph->new(); Function: Builds a new Bio::TreeIO::svggraph object Returns : Bio::TreeIO::svggraph Args :-width => image width (default 1600) -height => image height (default 1000) -margin => margin (default 30) -stroke => stroke color (default 'black') -stroke_width=> stroke width (default 2) -font_size=> font size (default '10px') -nomalize => undef or 'log' (default is undef) write_tree Title : write_tree Usage : $treeio->write_tree($tree); Function: Write a tree out to data stream in newick/phylip format Returns : none Args : Bio::Tree::TreeI object decorateRoot Title : _decorateRoot Usage : internal methods Function: Example : Returns : Args : next_tree Title : next_tree Usage : Function: Sorry not possible with this format Returns : none Args : none perl v5.14.2 2012-03-02 Bio::TreeIO::svggraph(3pm)
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