Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
Fixed:
use strict; use warnings; use IO::Select qw( ); use IPC::Open3 qw( open3 ); use Socket qw( AF_UNIX SOCK_STREAM PF_UNSPEC ); sub _pipe { socketpair($_[0], $_[1], AF_UNIX, SOCK_STREAM, PF_UNSPEC) or return undef; shutdown($_[0], 1); # No more writing for reader shutdown($_[1], 0); # No more reading for writer return 1; } sub _open3 { local (*TO_CHLD_R, *TO_CHLD_W); local (*FR_CHLD_R, *FR_CHLD_W); local (*FR_CHLD_ERR_R, *FR_CHLD_ERR_W); if ($^O =~ /Win32/) { _pipe(*TO_CHLD_R, *TO_CHLD_W ) or die $^E; _pipe(*FR_CHLD_R, *FR_CHLD_W ) or die $^E; _pipe(*FR_CHLD_ERR_R, *FR_CHLD_ERR_W) or die $^E; } else { pipe(*TO_CHLD_R, *TO_CHLD_W ) or die $!; pipe(*FR_CHLD_R, *FR_CHLD_W ) or die $!; pipe(*FR_CHLD_ERR_R, *FR_CHLD_ERR_W) or die $!; } my $pid = open3('>&TO_CHLD_R', '<&FR_CHLD_W', '<&FR_CHLD_ERR_W', @ +_); return ( $pid, *TO_CHLD_W, *FR_CHLD_R, *FR_CHLD_ERR_R ); } my ($pid, $to_chld, $fr_chld, $fr_chld_err) = _open3('cmd /c "dir /s/b"'); my %objs; my $in_sel = IO::Select->new(); my $out_sel = IO::Select->new(); for my $fh ($fr_chld, $fr_chld_err) { my $obj = { buf => '', }; $objs{ fileno($fh) } = $obj; $in_sel->add($fh); } close($to_chld); while ($in_sel->count() + $out_sel->count()) { my ($ins, $outs) = IO::Select::select($in_sel, $out_sel, undef); for my $fh (@$ins) { my $obj = $objs{ fileno($fh) }; our $buf; local *buf = \( $obj->{buf} ); my $bytes_read = sysread($fh, $buf, 64*1024, length($buf)); if (!$bytes_read) { warn("Error reading from child: $!\n") if !defined($bytes_read); $in_sel->remove($fh); } } for my $fh (@$outs) { } } waitpid($pid, 0); print("STDOUT:\n$objs{ fileno( $fr_chld ) }{buf}"); print("\n"; print("STDERR:\n$objs{ fileno( $fr_chld_err ) }{buf}");

In reply to Re^4: why IPC::Open3 can't execute MS-DOS "dir" command? by ikegami
in thread why IPC::Open3 can't execute MS-DOS "dir" command? by kiinoo

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others browsing the Monastery: (6)
    As of 2014-07-30 00:40 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      My favorite superfluous repetitious redundant duplicative phrase is:









      Results (229 votes), past polls