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package IPC::Run::SafeHandles; |
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use warnings; |
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use strict; |
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1090
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use IO::Handle (); |
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use List::MoreUtils 'any'; |
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=head1 NAME |
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IPC::Run::SafeHandles - Use IPC::Run and IPC::Run3 safely |
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=cut |
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our $VERSION = '0.04'; |
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=head1 SYNOPSIS |
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use IPC::Run::SafeHandles; |
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=head1 DESCRIPTION |
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L and L are both very upset when you try to use |
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them under environments where you have STDOUT and/or STDERR tied to |
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something else, such as under fastcgi. |
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The module adds safe-guarding code when you call L or |
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L under such environment to make sure it always works. |
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If you intend to release your code to work under normal envionrment |
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as well as under fastcgi, simply use this module I the C |
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modules are loaded in your code. |
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=cut |
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my $wrapper_context = []; |
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sub _wrap_it { |
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no strict 'refs'; |
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my $typeglob = shift; |
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my $caller = shift; |
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my $original = *$typeglob{CODE}; |
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my $unwrap = 0; |
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my $wrapper = sub { |
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goto &$original unless $ENV{FCGI_ROLE} |
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|| any { $_ eq 'via'} PerlIO::get_layers(*STDOUT), PerlIO::get_layers(*STDERR); |
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my $stdout = IO::Handle->new; |
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$stdout->fdopen( 1, 'w' ); |
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local *STDOUT = $stdout; |
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my $stderr = IO::Handle->new; |
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$stderr->fdopen( 2, 'w' ); |
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local *STDERR = $stderr; |
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$original->(@_); |
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}; |
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no warnings 'redefine'; |
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210
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my $callerglob = $typeglob; $callerglob =~ s/IPC::Run3?/$caller/; |
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*{$typeglob} = $wrapper; |
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*{$callerglob} = $wrapper; |
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63
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push @$wrapper_context, |
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bless(sub { no warnings 'redefine'; |
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2
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*{$callerglob} = $original; |
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*{$typeglob} = $original }, __PACKAGE__); |
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67
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} |
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sub import { |
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my $caller = caller(); |
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_wrap_it('IPC::Run::run', $caller) if $INC{'IPC/Run.pm'}; |
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_wrap_it('IPC::Run3::run3', $caller) if $INC{'IPC/Run3.pm'}; |
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unless (@$wrapper_context) { |
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172
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Carp::carp "Use of IPC::Run::SafeHandles without using IPC::Run or IPC::Run3 first"; |
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} |
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} |
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79
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=head2 unimport |
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When unimport, the original L and/or L functions |
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are restored. |
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84
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=cut |
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86
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sub unimport { |
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$wrapper_context = []; |
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} |
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sub DESTROY { $_[0]->() } |
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92
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=head1 AUTHOR |
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94
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Chia-liang Kao, C<< >> |
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96
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=head1 BUGS |
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98
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Please report any bugs or feature requests to |
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C, or through the web interface at |
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L. |
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I will be notified, and then you'll automatically be notified of progress on |
102
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your bug as I make changes. |
103
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104
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=head1 SUPPORT |
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106
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You can find documentation for this module with the perldoc command. |
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108
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perldoc IPC::Run::SafeHandles |
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110
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You can also look for information at: |
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112
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=over 4 |
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114
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=item * AnnoCPAN: Annotated CPAN documentation |
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116
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L |
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118
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=item * CPAN Ratings |
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120
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L |
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122
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=item * RT: CPAN's request tracker |
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124
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L |
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126
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=item * Search CPAN |
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128
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L |
129
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130
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=back |
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132
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=head1 ACKNOWLEDGEMENTS |
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134
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=head1 COPYRIGHT & LICENSE |
135
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136
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Copyright 2007 Chia-liang Kao, all rights reserved. |
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138
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This program is free software; you can redistribute it and/or modify it |
139
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under the same terms as Perl itself. |
140
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141
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=cut |
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143
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1; # End of IPC::Run::SafeHandles |