/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_PARSE_OPTIONS_H
#define __SUBCMD_PARSE_OPTIONS_H
#include <linux/kernel.h>
#include <stdbool.h>
#include <stdint.h>
enum parse_opt_type {
/* special types */
OPTION_END,
OPTION_ARGUMENT,
OPTION_GROUP,
/* options with no arguments */
OPTION_BIT,
OPTION_BOOLEAN,
OPTION_INCR,
OPTION_SET_UINT,
OPTION_SET_PTR,
/* options with arguments (usually) */
OPTION_STRING,
OPTION_INTEGER,
OPTION_LONG,
OPTION_ULONG,
OPTION_CALLBACK,
OPTION_U64,
OPTION_UINTEGER,
};
enum parse_opt_flags {
PARSE_OPT_KEEP_DASHDASH = 1 ,
PARSE_OPT_STOP_AT_NON_OPTION = 2 ,
PARSE_OPT_KEEP_ARGV0 = 4 ,
PARSE_OPT_KEEP_UNKNOWN = 8 ,
PARSE_OPT_NO_INTERNAL_HELP = 16 ,
};
enum parse_opt_option_flags {
PARSE_OPT_OPTARG = 1 ,
PARSE_OPT_NOARG = 2 ,
PARSE_OPT_NONEG = 4 ,
PARSE_OPT_HIDDEN = 8 ,
PARSE_OPT_LASTARG_DEFAULT = 16 ,
PARSE_OPT_DISABLED = 32 ,
PARSE_OPT_EXCLUSIVE = 64 ,
PARSE_OPT_NOEMPTY = 128 ,
PARSE_OPT_NOBUILD = 256 ,
PARSE_OPT_CANSKIP = 512 ,
};
struct option;
typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
/*
* ` type ` : :
* holds the type of the option , you must have an OPTION_END last in your
* array .
*
* ` short_name ` : :
* the character to use as a short option name , ' \ 0 ' if none .
*
* ` long_name ` : :
* the long option name , without the leading dashes , NULL if none .
*
* ` value ` : :
* stores pointers to the values to be filled .
*
* ` argh ` : :
* token to explain the kind of argument this option wants . Keep it
* homogeneous across the repository .
*
* ` help ` : :
* the short help associated to what the option does .
* Must never be NULL ( except for OPTION_END ) .
* OPTION_GROUP uses this pointer to store the group header .
*
* ` flags ` : :
* mask of parse_opt_option_flags .
* PARSE_OPT_OPTARG : says that the argument is optional ( not for BOOLEANs )
* PARSE_OPT_NOARG : says that this option takes no argument , for CALLBACKs
* PARSE_OPT_NONEG : says that this option cannot be negated
* PARSE_OPT_HIDDEN this option is skipped in the default usage , showed in
* the long one .
*
* ` callback ` : :
* pointer to the callback to use for OPTION_CALLBACK .
*
* ` defval ` : :
* default value to fill ( * - > value ) with for PARSE_OPT_OPTARG .
* OPTION_ { BIT , SET_UINT , SET_PTR } store the { mask , integer , pointer } to put in
* the value when met .
* CALLBACKS can use it like they want .
*
* ` set ` : :
* whether an option was set by the user
*/
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_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 )))
void usage_with_options_msg(const char * const *usagestr,
const struct option *options,
const char *fmt, ...);
/*----- incremantal advanced APIs -----*/
enum {
PARSE_OPT_HELP = -1 ,
PARSE_OPT_DONE,
PARSE_OPT_LIST_OPTS,
PARSE_OPT_LIST_SUBCMDS,
PARSE_OPT_UNKNOWN,
};
/*
* It ' s okay for the caller to consume argv / argc in the usual way .
* Other fields of that structure are private to parse - options and should not
* be modified in any way .
*/
struct parse_opt_ctx_t {
const char **argv;
const char **out;
int argc, cpidx;
const char *opt;
const struct option *excl_opt;
int flags;
};
extern int parse_options_usage(const char * const *usagestr,
const struct option *opts,
const char *optstr,
bool short_opt);
/*----- some often used options -----*/
extern int parse_opt_abbrev_cb(const struct option *, const char *, int );
extern int parse_opt_approxidate_cb(const struct option *, const char *, int );
extern int parse_opt_verbosity_cb(const struct option *, const char *, int );
#define OPT__VERBOSE(var) OPT_BOOLEAN('v' , "verbose" , (var), "be verbose" )
#define OPT__QUIET(var) OPT_BOOLEAN('q' , "quiet" , (var), "be quiet" )
#define OPT__VERBOSITY(var) \
{ OPTION_CALLBACK, 'v' , "verbose" , (var), NULL, "be more verbose" , \
PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
{ OPTION_CALLBACK, 'q' , "quiet" , (var), NULL, "be more quiet" , \
PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
#define OPT__DRY_RUN(var) OPT_BOOLEAN('n' , "dry-run" , (var), "dry run" )
#define OPT__ABBREV(var) \
{ OPTION_CALLBACK, 0 , "abbrev" , (var), "n" , \
"use <n> digits to display SHA-1s" , \
PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
extern const char *parse_options_fix_filename(const char *prefix, const char *file);
void set_option_flag(struct option *opts, int sopt, const char *lopt, int flag);
void set_option_nobuild(struct option *opts, int shortopt, const char *longopt,
const char *build_opt, bool can_skip);
#endif /* __SUBCMD_PARSE_OPTIONS_H */
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