perl: IPC::Open3未能使用FCGI打开STDERR

Question

我用我的fcgi脚本测试了Git：：存储库。我既不能创建git对象，也不能使用该模块运行任何git命令。IPC：：open3 3：：open3出错：

不是/usr/local/lib/perl/5.10.1/FCGI.pm第125行的GLOB引用

我在FCGI::OPEN()中添加了一个cluck，在IPC::Open3::xopen()中添加了一个警告，下面是我得到的内容：

mod_fcgid: stderr: IPC::Open3::xopen() called with args: GLOB(0xe92360) <&=5 
mod_fcgid: stderr: IPC::Open3::xopen() called with args: GLOB(0xe92438) >&=9 
mod_fcgid: stderr: IPC::Open3::xopen() called with args: GLOB(0xe92498) >&=12 
mod_fcgid: stderr: FCGI::OPEN() called with args: FCGI::Stream=SCALAR(0x14e43f0) >&=12 
mod_fcgid: stderr:  at /usr/local/lib/perl/5.10.1/FCGI.pm line 125 
mod_fcgid: stderr: \tFCGI::Stream::OPEN('FCGI::Stream=SCALAR(0x14e43f0)', '>&=12') called at /usr/share/perl/5.10/IPC/Open3.pm line 67 
mod_fcgid: stderr: \tIPC::Open3::xopen('GLOB(0xe92498)', '>&=12') called at /usr/share/perl/5.10/IPC/Open3.pm line 162 
mod_fcgid: stderr: 
mod_fcgid: stderr: \tIPC::Open3::_open3('open3', 'MyModule', 'GLOB(0x1a56078)', 'GLOB(0x1906738)', 'GLOB(0x12f5430)' , '/usr/bin/git', '--version') called at /usr/share/perl/5.10/IPC/Open3.pm line 233 
mod_fcgid: stderr: \tIPC::Open3::open3('GLOB(0x1a56078)', 'GLOB(0x1906738)', 'GLOB(0x12f5430)', '/usr/bin/git', '--version') called at /usr/local/lib/site_perl/MyModule.pm line 113

只有在STDERR打开时才调用FCGI::OPEN()。STDIN和STDOUT没有到达FCGI::OPEN()。我查看了IPC::Open3，这是它失败的地方：

if ($dad_rdr ne $dad_err) {
    if ($dup_err) {
        # I have to use a fileno here because in this one case
        # I'm doing a dup but the filehandle might be a reference
        # (from the special case above).
        xopen \*STDERR, ">&" . xfileno($dad_err)
            if fileno(STDERR) != xfileno($dad_err);
    } else {
        xclose $dad_err;
        xopen \*STDERR, ">&=" . fileno $kid_err;  # this is failing
    }
} else {
    xopen \*STDERR, ">&STDOUT" if fileno(STDERR) != fileno(STDOUT);
}

我可以用IPC::Run::start代替open3，一切都很好。但我真的很想了解STDERR到底出了什么问题。是FCGI.pm或Open3.pm的错误，还是我做错了什么？

我正在运行Apache2.2.16，在debian压缩程序上使用li浸ache2-mod-fcgid 1:2.3.6、libfcgi-perl 0.71-1和libcgi-fast 5.10.1。Perl版本为5.10.1。

如何复制：

use CGI::Fast;
use Symbol ();
use IPC::Open3 qw(open3);

while (my $cgi = new CGI::Fast) {
    my $pid;
    my $in  = Symbol::gensym;
    my $out = Symbol::gensym;
    my $err = Symbol::gensym;    

    $pid = open3( $in, $out, $err, '/usr/bin/git', '--version');

}

Answer 1

这应该在System：https://metacpan.org/release/BOOK/System-Command-1.102的最新版本(1.102)中得到修正.

补丁是https://github.com/book/System-Command/commit/d5009728cc66e5f9bb2057df4be70648571a29cd