use POSIX ":sys_wait_h";
sub REAPER {
my $child;
- while ($child = waitpid(-1,WNOHANG)) {
+ while (($child = waitpid(-1,WNOHANG)) > 0) {
$Kid_Status{$child} = $?;
}
$SIG{CHLD} = \&REAPER; # still loathe sysV
open(PROG_FOR_READING_AND_WRITING, "| some program |")
-and if you forget to use the B<-w> flag, then you'll miss out
-entirely on the diagnostic message:
+and if you forget to use the C<use warnings> pragma or the B<-w> flag,
+then you'll miss out entirely on the diagnostic message:
Can't do bidirectional pipe at -e line 1.
The web server handing the "http" service, which is assumed to be at
its standard port, number 80. If your the web server you're trying to
connect to is at a different port (like 1080 or 8080), you should specify
-as the named-parameter pair, C<PeerPort =E<gt> 8080>. The C<autoflush>
+as the named-parameter pair, C<< PeerPort => 8080 >>. The C<autoflush>
method is used on the socket because otherwise the system would buffer
up the output we sent it. (If you're on a Mac, you'll also need to
change every C<"\n"> in your code that sends data over the network to
As always, setting up a server is little bit more involved than running a client.
The model is that the server creates a special kind of socket that
does nothing but listen on a particular port for incoming connections.
-It does this by calling the C<IO::Socket::INET-E<gt>new()> method with
+It does this by calling the C<< IO::Socket::INET->new() >> method with
slightly different arguments than the client did.
=over