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Perl getprotobyname Function
Description
This function translates the protocol NAME into its corresponding number in a scalar context, and its number and associated information in a list context:($name, $aliases, $protocol_number)
Syntax
Following is the simple syntax for this function −
getprotobyname NAME
Return Value
This function returns undef on error otherwise protocol number in scalar context and empty list on error protocol record (name, aliases, protocol number) in list context.
Example
Following is the example code showing its basic usage −
#!/usr/bin/perl ($name, $aliases, $protocol_number) = getprotobyname("tcp"); print "Name = $name\n"; print "Aliases = $aliases\n"; print "Protocol Number = $protocol_number\n";
When above code is executed, it produces the following result −
Name = tcp Aliases = TCP Protocol Number = 6
perl_function_references.htm
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