argtable

Argtable is an ANSI C library for parsing GNU getopt style command line arguments, as in "foo -abc -o myfile --help --count=7". With it, programmers define the allowable command line arguments statically in their program as an array of argtable structs. The command line arguments are then parsed against those specifications and their values deposited directly into user-defined program variables from where they can be accessed by the main program. It uses GNU getopt to perform the actual parsing, so it is guaranteed to be 100% GNU compatible. It is secure, guarding against buffer overrun attacks on command line arguments.