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由 Pierre Habouzit 提交于
The option parser takes argc, argv, an array of struct option and a usage string. Each of the struct option elements in the array describes a valid option, its type and a pointer to the location where the value is written. The entry point is parse_options(), which scans through the given argv, and matches each option there against the list of valid options. During the scan, argv is rewritten to only contain the non-option command line arguments and the number of these is returned. Aggregation of single switches is allowed: -rC0 is the same as -r -C 0 (supposing that -C wants an arg). Every long option automatically support the option with the same name, prefixed with 'no-' to unset the switch. It assumes that initial value for strings are "NULL" and for integers is "0". Long options are supported either with '=' or without: --some-option=foo is the same as --some-option foo Acked-by: NKristian Høgsberg <krh@redhat.com> Signed-off-by: NPierre Habouzit <madcoder@debian.org> Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
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