tools/include/nolibc/getopt.h

Source file repositories/reference/linux-study-clean/tools/include/nolibc/getopt.h

File Facts

System
Linux kernel
Corpus path
tools/include/nolibc/getopt.h
Extension
.h
Size
2029 bytes
Lines
102
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (optstring[0] == '-') {
			optarg = argv[optind++];
			return 1;
		}
		return -1;
	}

	if (!argv[optind][1])
		return -1;

	if (argv[optind][1] == '-' && !argv[optind][2])
		return optind++, -1;

	if (!__optpos)
		__optpos++;
	c = argv[optind][__optpos];
	optchar = argv[optind] + __optpos;
	__optpos++;

	if (!argv[optind][__optpos]) {
		optind++;
		__optpos = 0;
	}

	if (optstring[0] == '-' || optstring[0] == '+')
		optstring++;

	i = 0;
	d = 0;
	do {
		d = optstring[i++];
	} while (d && d != c);

	if (!d || d != c || c == ':') {
		optopt = c;
		if (optstring[0] != ':' && opterr)
			fprintf(stderr, "%s: unrecognized option: %c\n", argv[0], *optchar);
		return '?';
	}
	if (optstring[i] == ':') {
		optarg = NULL;
		if (optstring[i + 1] != ':' || __optpos) {
			optarg = argv[optind++];
			if (__optpos)
				optarg += __optpos;
			__optpos = 0;
		}
		if (optind > argc) {
			optopt = c;
			if (optstring[0] == ':')
				return ':';
			if (opterr)
				fprintf(stderr, "%s: option requires argument: %c\n",
					argv[0], *optchar);
			return '?';
		}
	}
	return c;
}

#endif /* _NOLIBC_GETOPT_H */

Annotation

Implementation Notes