#!/usr/bin/perl -w

# detach from the terminal, go into the BG and then exec a program
# detacher.pl <program> {parm1} {parm2} ...

use strict;

sub main {

  my ($pid,$line);
  my (@args);

  # fork and exit if parent
  $pid = fork;
  if($pid) { exit 0; }

  # duplicate STD paths
  open (DUPOUT,">&STDOUT");
  open (DUPERR,">&STDERR");
  open (DUPIN, "<&STDIN");

  # close STD paths so parent can exit clenaly
  close STDOUT;
  close STDERR;
  close STDIN;

  # restore the STD paths from duplicates
  open (STDOUT,">&DUPOUT");
  open (STDERR,">&DUPERR");
  open (STDIN,"<&DUPIN");

  # avoid leaks! close teh duplicate paths
  close DUPOUT;
  close DUPERR;
  close DUPIN;

  # construct a command list
  @args = ();
  foreach $line (@ARGV) {
    push @args,$line;
  }

  # finally exec the new program
  exec @args;
}

main()

[download]

In reply to detacher.pl by enemyofthestate

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.