tools/lib/subcmd/parse-options.h

Source file repositories/reference/linux-study-clean/tools/lib/subcmd/parse-options.h

File Facts

System: Linux kernel
Corpus path: tools/lib/subcmd/parse-options.h
Extension: .h
Size: 10745 bytes
Lines: 248
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.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/kernel.h
stdbool.h
stdint.h

Detected Declarations

struct option
struct option
struct parse_opt_ctx_t
enum parse_opt_type
enum parse_opt_flags
enum parse_opt_option_flags

Annotated Snippet

struct option {
	enum parse_opt_type type;
	int short_name;
	const char *long_name;
	void *value;
	const char *argh;
	const char *help;
	const char *build_opt;

	int flags;
	parse_opt_cb *callback;
	intptr_t defval;
	bool *set;
	void *data;
	const struct option *parent;
};

#define check_vtype(v, type) ( BUILD_BUG_ON_ZERO(!__builtin_types_compatible_p(typeof(v), type)) + v )

#define OPT_END()                   { .type = OPTION_END }
#define OPT_PARENT(p)               { .type = OPTION_END, .parent = (p) }
#define OPT_ARGUMENT(l, h)          { .type = OPTION_ARGUMENT, .long_name = (l), .help = (h) }
#define OPT_GROUP(h)                { .type = OPTION_GROUP, .help = (h) }
#define OPT_BIT(s, l, v, h, b)      { .type = OPTION_BIT, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h), .defval = (b) }
#define OPT_BOOLEAN(s, l, v, h)     { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h) }
#define OPT_BOOLEAN_FLAG(s, l, v, h, f)     { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h), .flags = (f) }
#define OPT_BOOLEAN_SET(s, l, v, os, h) \
	{ .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), \
	.value = check_vtype(v, bool *), .help = (h), \
	.set = check_vtype(os, bool *)}
#define OPT_INCR(s, l, v, h)        { .type = OPTION_INCR, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
#define OPT_SET_UINT(s, l, v, h, i)  { .type = OPTION_SET_UINT, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h), .defval = (i) }
#define OPT_SET_PTR(s, l, v, h, p)  { .type = OPTION_SET_PTR, .short_name = (s), .long_name = (l), .value = (v), .help = (h), .defval = (p) }
#define OPT_INTEGER(s, l, v, h)     { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
#define OPT_UINTEGER(s, l, v, h)    { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h) }
#define OPT_UINTEGER_OPTARG(s, l, v, d, h)    { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h), .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d) }
#define OPT_LONG(s, l, v, h)        { .type = OPTION_LONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, long *), .help = (h) }
#define OPT_ULONG(s, l, v, h)        { .type = OPTION_ULONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned long *), .help = (h) }
#define OPT_U64(s, l, v, h)         { .type = OPTION_U64, .short_name = (s), .long_name = (l), .value = check_vtype(v, u64 *), .help = (h) }
#define OPT_STRING(s, l, v, a, h)   { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), .value = check_vtype(v, const char **), .argh = (a), .help = (h) }
#define OPT_STRING_OPTARG(s, l, v, a, h, d) \
	{ .type = OPTION_STRING,  .short_name = (s), .long_name = (l), \
	  .value = check_vtype(v, const char **), .argh =(a), .help = (h), \
	  .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d) }
#define OPT_STRING_OPTARG_SET(s, l, v, os, a, h, d) \
	{ .type = OPTION_STRING, .short_name = (s), .long_name = (l), \
	  .value = check_vtype(v, const char **), .argh = (a), .help = (h), \
	  .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d), \
	  .set = check_vtype(os, bool *)}
#define OPT_STRING_NOEMPTY(s, l, v, a, h)   { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), .value = check_vtype(v, const char **), .argh = (a), .help = (h), .flags = PARSE_OPT_NOEMPTY}
#define OPT_DATE(s, l, v, h) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb }
#define OPT_CALLBACK(s, l, v, a, h, f) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .callback = (f) }
#define OPT_CALLBACK_FLAG(s, l, v, a, h, f, fl) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .callback = (f), .flags = (fl) }
#define OPT_CALLBACK_SET(s, l, v, os, a, h, f) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .callback = (f), .set = check_vtype(os, bool *)}
#define OPT_CALLBACK_NOOPT(s, l, v, a, h, f) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .callback = (f), .flags = PARSE_OPT_NOARG }
#define OPT_CALLBACK_DEFAULT(s, l, v, a, h, f, d) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .callback = (f), .defval = (intptr_t)d, .flags = PARSE_OPT_LASTARG_DEFAULT }
#define OPT_CALLBACK_DEFAULT_NOOPT(s, l, v, a, h, f, d) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l),\
	.value = (v), .arg = (a), .help = (h), .callback = (f), .defval = (intptr_t)d,\
	.flags = PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NOARG}
#define OPT_CALLBACK_OPTARG(s, l, v, d, a, h, f) \
	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), \
	  .value = (v), .argh = (a), .help = (h), .callback = (f), \
	  .flags = PARSE_OPT_OPTARG, .data = (d) }

/* parse_options() will filter out the processed options and leave the
 * non-option argments in argv[].
 * Returns the number of arguments left in argv[].
 *
 * NOTE: parse_options() and parse_options_subcommand() may call exit() in the
 * case of an error (or for 'special' options like --list-cmds or --list-opts).
 */
extern int parse_options(int argc, const char **argv,
                         const struct option *options,
                         const char * const usagestr[], int flags);

extern int parse_options_subcommand(int argc, const char **argv,
				const struct option *options,
				const char *const subcommands[],
				const char *usagestr[], int flags);

extern __noreturn void usage_with_options(const char * const *usagestr,
                                        const struct option *options);
extern __noreturn __attribute__((format(printf,3,4)))

Annotation

Immediate include surface: `linux/kernel.h`, `stdbool.h`, `stdint.h`.
Detected declarations: `struct option`, `struct option`, `struct parse_opt_ctx_t`, `enum parse_opt_type`, `enum parse_opt_flags`, `enum parse_opt_option_flags`.
Atlas domain: Support Tooling And Documentation / tools.
Implementation status: source implementation candidate.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.