System calls are functions that a programmer can call to perform the services of the operating system. There are several online books that describe them at some length, for example Programming in C. Unix manual pages are probably the first stop. They are often referred to as "man pages," because they are accessed with the man command. The manual pages are divided into eight sections. They are organized as follows:read more
The standard Perl distribution comes with a debugger, although it's really just another Perl program, perl5db.pl. Since it is just a program, I can use it as the basis for writing my own debuggers to suit my needs, or I can use the interface perl5db.pl provides to configure its actions. That's just the beginning, though. read more...
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