我试图通过一个执行过的子进程使STDOUT/STDERR通过Perl中的管道回到父节点。我看到的最接近我想要做的是: http://forums.devshed.com/perl-programming-6/exec-and-redirecting-stdout-stderr-168501.html将执行过程的标准输入/标准输出重定向到Perl中的管道
以下是我尝试去做的一个简单例子。我也尝试了上述链接的变体。我看不到我在做什么错...
#!/usr/bin/env perl
use strict ;
use warnings ;
my $cmd = "/usr/bin/who -a" ; # anything to stdout
pipe(READER, WRITER) ;
my $child = fork() ;
if ($child) {
print "I am the parent: My pid = $$ junior = $child\n" ;
close(WRITER) ;
my @output = <READER> ;
print @output ;
print "parent is DONE\n" ;
} else {
print "I am the child. My pid = $$\n" ;
close(READER) ;
close(STDOUT);
close(STDERR);
*STDOUT = *WRITER ;
*STDERR = *WRITER ;
print WRITER "XXX ouput before exec....\n" ;
exec($cmd) or exit(1) ;
}
您可能感兴趣的[IPC :: Open2(http://perldoc.perl.org/IPC/Open2.html)。 – squiguy