NAME

Relational Operators Perl operators that return true or false generally return values that can be safely used as numbers. For example, the

-X FILEHANDLE -X EXPR -X DIRHANDLE -X A

__DATA__ These keywords are documented in Special

NAME DESCRIPTION SignalsHandling the SIGHUP Signal in Daemons Deferred Signals (Safe Signals) Named Pipes Using open() for IPCFilehandles Background Processes Complete Dissociation of Child from Parent Safe Pipe Opens Avoiding Pipe Deadlocks Bidirectional Communication with Another Process Bidirectional Communication with Yourself Sockets: Client/Server CommunicationInternet Line Terminators Internet TCP Clients and Servers Unix-Domain TCP Clients and Servers TCP Clients with IO::SocketA

List Operators (Rightward) On the right side of a list operator, the comma has very low precedence, such that it controls all comma-separated

$OLD_PERL_VERSION

NAME

$^O The name of the operating system under which this copy of Perl was built, as determined during the configuration process. For examples

NAME