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//usr/share/perl/5.28.1/IPC/Open2.pm
package IPC::Open2; use strict; our ($VERSION, @ISA, @EXPORT); require 5.000; require Exporter; $VERSION = 1.04; @ISA = qw(Exporter); @EXPORT = qw(open2); # &open2: tom christiansen, <tchrist@convex.com> # # usage: $pid = open2('rdr', 'wtr', 'some cmd and args'); # or $pid = open2('rdr', 'wtr', 'some', 'cmd', 'and', 'args'); # # spawn the given $cmd and connect $rdr for # reading and $wtr for writing. return pid # of child, or 0 on failure. # # WARNING: this is dangerous, as you may block forever # unless you are very careful. # # $wtr is left unbuffered. # # abort program if # rdr or wtr are null # a system call fails require IPC::Open3; sub open2 { local $Carp::CarpLevel = $Carp::CarpLevel + 1; return IPC::Open3::_open3('open2', $_[1], $_[0], '>&STDERR', @_[2 .. $#_]); } 1