1006 lines
23 KiB
C
1006 lines
23 KiB
C
#include <linux/compiler.h>
|
|
#include <linux/string.h>
|
|
#include <linux/types.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include "subcmd-util.h"
|
|
#include "parse-options.h"
|
|
#include "subcmd-config.h"
|
|
#include "pager.h"
|
|
|
|
#define OPT_SHORT 1
|
|
#define OPT_UNSET 2
|
|
|
|
char *error_buf;
|
|
|
|
static int opterror(const struct option *opt, const char *reason, int flags)
|
|
{
|
|
if (flags & OPT_SHORT)
|
|
fprintf(stderr, " Error: switch `%c' %s", opt->short_name, reason);
|
|
else if (flags & OPT_UNSET)
|
|
fprintf(stderr, " Error: option `no-%s' %s", opt->long_name, reason);
|
|
else
|
|
fprintf(stderr, " Error: option `%s' %s", opt->long_name, reason);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static const char *skip_prefix(const char *str, const char *prefix)
|
|
{
|
|
size_t len = strlen(prefix);
|
|
return strncmp(str, prefix, len) ? NULL : str + len;
|
|
}
|
|
|
|
static void optwarning(const struct option *opt, const char *reason, int flags)
|
|
{
|
|
if (flags & OPT_SHORT)
|
|
fprintf(stderr, " Warning: switch `%c' %s", opt->short_name, reason);
|
|
else if (flags & OPT_UNSET)
|
|
fprintf(stderr, " Warning: option `no-%s' %s", opt->long_name, reason);
|
|
else
|
|
fprintf(stderr, " Warning: option `%s' %s", opt->long_name, reason);
|
|
}
|
|
|
|
static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
|
|
int flags, const char **arg)
|
|
{
|
|
const char *res;
|
|
|
|
if (p->opt) {
|
|
res = p->opt;
|
|
p->opt = NULL;
|
|
} else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 ||
|
|
**(p->argv + 1) == '-')) {
|
|
res = (const char *)opt->defval;
|
|
} else if (p->argc > 1) {
|
|
p->argc--;
|
|
res = *++p->argv;
|
|
} else
|
|
return opterror(opt, "requires a value", flags);
|
|
if (arg)
|
|
*arg = res;
|
|
return 0;
|
|
}
|
|
|
|
static int get_value(struct parse_opt_ctx_t *p,
|
|
const struct option *opt, int flags)
|
|
{
|
|
const char *s, *arg = NULL;
|
|
const int unset = flags & OPT_UNSET;
|
|
int err;
|
|
|
|
if (unset && p->opt)
|
|
return opterror(opt, "takes no value", flags);
|
|
if (unset && (opt->flags & PARSE_OPT_NONEG))
|
|
return opterror(opt, "isn't available", flags);
|
|
if (opt->flags & PARSE_OPT_DISABLED)
|
|
return opterror(opt, "is not usable", flags);
|
|
|
|
if (opt->flags & PARSE_OPT_EXCLUSIVE) {
|
|
if (p->excl_opt && p->excl_opt != opt) {
|
|
char msg[128];
|
|
|
|
if (((flags & OPT_SHORT) && p->excl_opt->short_name) ||
|
|
p->excl_opt->long_name == NULL) {
|
|
snprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
|
|
p->excl_opt->short_name);
|
|
} else {
|
|
snprintf(msg, sizeof(msg), "cannot be used with %s",
|
|
p->excl_opt->long_name);
|
|
}
|
|
opterror(opt, msg, flags);
|
|
return -3;
|
|
}
|
|
p->excl_opt = opt;
|
|
}
|
|
if (!(flags & OPT_SHORT) && p->opt) {
|
|
switch (opt->type) {
|
|
case OPTION_CALLBACK:
|
|
if (!(opt->flags & PARSE_OPT_NOARG))
|
|
break;
|
|
/* FALLTHROUGH */
|
|
case OPTION_BOOLEAN:
|
|
case OPTION_INCR:
|
|
case OPTION_BIT:
|
|
case OPTION_SET_UINT:
|
|
case OPTION_SET_PTR:
|
|
return opterror(opt, "takes no value", flags);
|
|
case OPTION_END:
|
|
case OPTION_ARGUMENT:
|
|
case OPTION_GROUP:
|
|
case OPTION_STRING:
|
|
case OPTION_INTEGER:
|
|
case OPTION_UINTEGER:
|
|
case OPTION_LONG:
|
|
case OPTION_U64:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (opt->flags & PARSE_OPT_NOBUILD) {
|
|
char reason[128];
|
|
bool noarg = false;
|
|
|
|
err = snprintf(reason, sizeof(reason),
|
|
opt->flags & PARSE_OPT_CANSKIP ?
|
|
"is being ignored because %s " :
|
|
"is not available because %s",
|
|
opt->build_opt);
|
|
reason[sizeof(reason) - 1] = '\0';
|
|
|
|
if (err < 0)
|
|
strncpy(reason, opt->flags & PARSE_OPT_CANSKIP ?
|
|
"is being ignored" :
|
|
"is not available",
|
|
sizeof(reason));
|
|
|
|
if (!(opt->flags & PARSE_OPT_CANSKIP))
|
|
return opterror(opt, reason, flags);
|
|
|
|
err = 0;
|
|
if (unset)
|
|
noarg = true;
|
|
if (opt->flags & PARSE_OPT_NOARG)
|
|
noarg = true;
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
|
|
noarg = true;
|
|
|
|
switch (opt->type) {
|
|
case OPTION_BOOLEAN:
|
|
case OPTION_INCR:
|
|
case OPTION_BIT:
|
|
case OPTION_SET_UINT:
|
|
case OPTION_SET_PTR:
|
|
case OPTION_END:
|
|
case OPTION_ARGUMENT:
|
|
case OPTION_GROUP:
|
|
noarg = true;
|
|
break;
|
|
case OPTION_CALLBACK:
|
|
case OPTION_STRING:
|
|
case OPTION_INTEGER:
|
|
case OPTION_UINTEGER:
|
|
case OPTION_LONG:
|
|
case OPTION_U64:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!noarg)
|
|
err = get_arg(p, opt, flags, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
optwarning(opt, reason, flags);
|
|
return 0;
|
|
}
|
|
|
|
switch (opt->type) {
|
|
case OPTION_BIT:
|
|
if (unset)
|
|
*(int *)opt->value &= ~opt->defval;
|
|
else
|
|
*(int *)opt->value |= opt->defval;
|
|
return 0;
|
|
|
|
case OPTION_BOOLEAN:
|
|
*(bool *)opt->value = unset ? false : true;
|
|
if (opt->set)
|
|
*(bool *)opt->set = true;
|
|
return 0;
|
|
|
|
case OPTION_INCR:
|
|
*(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
|
|
return 0;
|
|
|
|
case OPTION_SET_UINT:
|
|
*(unsigned int *)opt->value = unset ? 0 : opt->defval;
|
|
return 0;
|
|
|
|
case OPTION_SET_PTR:
|
|
*(void **)opt->value = unset ? NULL : (void *)opt->defval;
|
|
return 0;
|
|
|
|
case OPTION_STRING:
|
|
err = 0;
|
|
if (unset)
|
|
*(const char **)opt->value = NULL;
|
|
else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
|
|
*(const char **)opt->value = (const char *)opt->defval;
|
|
else
|
|
err = get_arg(p, opt, flags, (const char **)opt->value);
|
|
|
|
if (opt->set)
|
|
*(bool *)opt->set = true;
|
|
|
|
/* PARSE_OPT_NOEMPTY: Allow NULL but disallow empty string. */
|
|
if (opt->flags & PARSE_OPT_NOEMPTY) {
|
|
const char *val = *(const char **)opt->value;
|
|
|
|
if (!val)
|
|
return err;
|
|
|
|
/* Similar to unset if we are given an empty string. */
|
|
if (val[0] == '\0') {
|
|
*(const char **)opt->value = NULL;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
|
|
case OPTION_CALLBACK:
|
|
if (unset)
|
|
return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
|
|
if (opt->flags & PARSE_OPT_NOARG)
|
|
return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
|
|
return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
|
|
if (get_arg(p, opt, flags, &arg))
|
|
return -1;
|
|
return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
|
|
|
|
case OPTION_INTEGER:
|
|
if (unset) {
|
|
*(int *)opt->value = 0;
|
|
return 0;
|
|
}
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
|
|
*(int *)opt->value = opt->defval;
|
|
return 0;
|
|
}
|
|
if (get_arg(p, opt, flags, &arg))
|
|
return -1;
|
|
*(int *)opt->value = strtol(arg, (char **)&s, 10);
|
|
if (*s)
|
|
return opterror(opt, "expects a numerical value", flags);
|
|
return 0;
|
|
|
|
case OPTION_UINTEGER:
|
|
if (unset) {
|
|
*(unsigned int *)opt->value = 0;
|
|
return 0;
|
|
}
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
|
|
*(unsigned int *)opt->value = opt->defval;
|
|
return 0;
|
|
}
|
|
if (get_arg(p, opt, flags, &arg))
|
|
return -1;
|
|
if (arg[0] == '-')
|
|
return opterror(opt, "expects an unsigned numerical value", flags);
|
|
*(unsigned int *)opt->value = strtol(arg, (char **)&s, 10);
|
|
if (*s)
|
|
return opterror(opt, "expects a numerical value", flags);
|
|
return 0;
|
|
|
|
case OPTION_LONG:
|
|
if (unset) {
|
|
*(long *)opt->value = 0;
|
|
return 0;
|
|
}
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
|
|
*(long *)opt->value = opt->defval;
|
|
return 0;
|
|
}
|
|
if (get_arg(p, opt, flags, &arg))
|
|
return -1;
|
|
*(long *)opt->value = strtol(arg, (char **)&s, 10);
|
|
if (*s)
|
|
return opterror(opt, "expects a numerical value", flags);
|
|
return 0;
|
|
|
|
case OPTION_U64:
|
|
if (unset) {
|
|
*(u64 *)opt->value = 0;
|
|
return 0;
|
|
}
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
|
|
*(u64 *)opt->value = opt->defval;
|
|
return 0;
|
|
}
|
|
if (get_arg(p, opt, flags, &arg))
|
|
return -1;
|
|
if (arg[0] == '-')
|
|
return opterror(opt, "expects an unsigned numerical value", flags);
|
|
*(u64 *)opt->value = strtoull(arg, (char **)&s, 10);
|
|
if (*s)
|
|
return opterror(opt, "expects a numerical value", flags);
|
|
return 0;
|
|
|
|
case OPTION_END:
|
|
case OPTION_ARGUMENT:
|
|
case OPTION_GROUP:
|
|
default:
|
|
die("should not happen, someone must be hit on the forehead");
|
|
}
|
|
}
|
|
|
|
static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
|
|
{
|
|
retry:
|
|
for (; options->type != OPTION_END; options++) {
|
|
if (options->short_name == *p->opt) {
|
|
p->opt = p->opt[1] ? p->opt + 1 : NULL;
|
|
return get_value(p, options, OPT_SHORT);
|
|
}
|
|
}
|
|
|
|
if (options->parent) {
|
|
options = options->parent;
|
|
goto retry;
|
|
}
|
|
|
|
return -2;
|
|
}
|
|
|
|
static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
|
|
const struct option *options)
|
|
{
|
|
const char *arg_end = strchr(arg, '=');
|
|
const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
|
|
int abbrev_flags = 0, ambiguous_flags = 0;
|
|
|
|
if (!arg_end)
|
|
arg_end = arg + strlen(arg);
|
|
|
|
retry:
|
|
for (; options->type != OPTION_END; options++) {
|
|
const char *rest;
|
|
int flags = 0;
|
|
|
|
if (!options->long_name)
|
|
continue;
|
|
|
|
rest = skip_prefix(arg, options->long_name);
|
|
if (options->type == OPTION_ARGUMENT) {
|
|
if (!rest)
|
|
continue;
|
|
if (*rest == '=')
|
|
return opterror(options, "takes no value", flags);
|
|
if (*rest)
|
|
continue;
|
|
p->out[p->cpidx++] = arg - 2;
|
|
return 0;
|
|
}
|
|
if (!rest) {
|
|
if (strstarts(options->long_name, "no-")) {
|
|
/*
|
|
* The long name itself starts with "no-", so
|
|
* accept the option without "no-" so that users
|
|
* do not have to enter "no-no-" to get the
|
|
* negation.
|
|
*/
|
|
rest = skip_prefix(arg, options->long_name + 3);
|
|
if (rest) {
|
|
flags |= OPT_UNSET;
|
|
goto match;
|
|
}
|
|
/* Abbreviated case */
|
|
if (strstarts(options->long_name + 3, arg)) {
|
|
flags |= OPT_UNSET;
|
|
goto is_abbreviated;
|
|
}
|
|
}
|
|
/* abbreviated? */
|
|
if (!strncmp(options->long_name, arg, arg_end - arg)) {
|
|
is_abbreviated:
|
|
if (abbrev_option) {
|
|
/*
|
|
* If this is abbreviated, it is
|
|
* ambiguous. So when there is no
|
|
* exact match later, we need to
|
|
* error out.
|
|
*/
|
|
ambiguous_option = abbrev_option;
|
|
ambiguous_flags = abbrev_flags;
|
|
}
|
|
if (!(flags & OPT_UNSET) && *arg_end)
|
|
p->opt = arg_end + 1;
|
|
abbrev_option = options;
|
|
abbrev_flags = flags;
|
|
continue;
|
|
}
|
|
/* negated and abbreviated very much? */
|
|
if (strstarts("no-", arg)) {
|
|
flags |= OPT_UNSET;
|
|
goto is_abbreviated;
|
|
}
|
|
/* negated? */
|
|
if (strncmp(arg, "no-", 3))
|
|
continue;
|
|
flags |= OPT_UNSET;
|
|
rest = skip_prefix(arg + 3, options->long_name);
|
|
/* abbreviated and negated? */
|
|
if (!rest && strstarts(options->long_name, arg + 3))
|
|
goto is_abbreviated;
|
|
if (!rest)
|
|
continue;
|
|
}
|
|
match:
|
|
if (*rest) {
|
|
if (*rest != '=')
|
|
continue;
|
|
p->opt = rest + 1;
|
|
}
|
|
return get_value(p, options, flags);
|
|
}
|
|
|
|
if (ambiguous_option) {
|
|
fprintf(stderr,
|
|
" Error: Ambiguous option: %s (could be --%s%s or --%s%s)",
|
|
arg,
|
|
(ambiguous_flags & OPT_UNSET) ? "no-" : "",
|
|
ambiguous_option->long_name,
|
|
(abbrev_flags & OPT_UNSET) ? "no-" : "",
|
|
abbrev_option->long_name);
|
|
return -1;
|
|
}
|
|
if (abbrev_option)
|
|
return get_value(p, abbrev_option, abbrev_flags);
|
|
|
|
if (options->parent) {
|
|
options = options->parent;
|
|
goto retry;
|
|
}
|
|
|
|
return -2;
|
|
}
|
|
|
|
static void check_typos(const char *arg, const struct option *options)
|
|
{
|
|
if (strlen(arg) < 3)
|
|
return;
|
|
|
|
if (strstarts(arg, "no-")) {
|
|
fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
|
|
exit(129);
|
|
}
|
|
|
|
for (; options->type != OPTION_END; options++) {
|
|
if (!options->long_name)
|
|
continue;
|
|
if (strstarts(options->long_name, arg)) {
|
|
fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
|
|
exit(129);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void parse_options_start(struct parse_opt_ctx_t *ctx,
|
|
int argc, const char **argv, int flags)
|
|
{
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
ctx->argc = argc - 1;
|
|
ctx->argv = argv + 1;
|
|
ctx->out = argv;
|
|
ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
|
|
ctx->flags = flags;
|
|
if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
|
|
(flags & PARSE_OPT_STOP_AT_NON_OPTION))
|
|
die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
|
|
}
|
|
|
|
static int usage_with_options_internal(const char * const *,
|
|
const struct option *, int,
|
|
struct parse_opt_ctx_t *);
|
|
|
|
static int parse_options_step(struct parse_opt_ctx_t *ctx,
|
|
const struct option *options,
|
|
const char * const usagestr[])
|
|
{
|
|
int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
|
|
int excl_short_opt = 1;
|
|
const char *arg;
|
|
|
|
/* we must reset ->opt, unknown short option leave it dangling */
|
|
ctx->opt = NULL;
|
|
|
|
for (; ctx->argc; ctx->argc--, ctx->argv++) {
|
|
arg = ctx->argv[0];
|
|
if (*arg != '-' || !arg[1]) {
|
|
if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
|
|
break;
|
|
ctx->out[ctx->cpidx++] = ctx->argv[0];
|
|
continue;
|
|
}
|
|
|
|
if (arg[1] != '-') {
|
|
ctx->opt = ++arg;
|
|
if (internal_help && *ctx->opt == 'h') {
|
|
return usage_with_options_internal(usagestr, options, 0, ctx);
|
|
}
|
|
switch (parse_short_opt(ctx, options)) {
|
|
case -1:
|
|
return parse_options_usage(usagestr, options, arg, 1);
|
|
case -2:
|
|
goto unknown;
|
|
case -3:
|
|
goto exclusive;
|
|
default:
|
|
break;
|
|
}
|
|
if (ctx->opt)
|
|
check_typos(arg, options);
|
|
while (ctx->opt) {
|
|
if (internal_help && *ctx->opt == 'h')
|
|
return usage_with_options_internal(usagestr, options, 0, ctx);
|
|
arg = ctx->opt;
|
|
switch (parse_short_opt(ctx, options)) {
|
|
case -1:
|
|
return parse_options_usage(usagestr, options, arg, 1);
|
|
case -2:
|
|
/* fake a short option thing to hide the fact that we may have
|
|
* started to parse aggregated stuff
|
|
*
|
|
* This is leaky, too bad.
|
|
*/
|
|
ctx->argv[0] = strdup(ctx->opt - 1);
|
|
*(char *)ctx->argv[0] = '-';
|
|
goto unknown;
|
|
case -3:
|
|
goto exclusive;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (!arg[2]) { /* "--" */
|
|
if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
|
|
ctx->argc--;
|
|
ctx->argv++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
arg += 2;
|
|
if (internal_help && !strcmp(arg, "help-all"))
|
|
return usage_with_options_internal(usagestr, options, 1, ctx);
|
|
if (internal_help && !strcmp(arg, "help"))
|
|
return usage_with_options_internal(usagestr, options, 0, ctx);
|
|
if (!strcmp(arg, "list-opts"))
|
|
return PARSE_OPT_LIST_OPTS;
|
|
if (!strcmp(arg, "list-cmds"))
|
|
return PARSE_OPT_LIST_SUBCMDS;
|
|
switch (parse_long_opt(ctx, arg, options)) {
|
|
case -1:
|
|
return parse_options_usage(usagestr, options, arg, 0);
|
|
case -2:
|
|
goto unknown;
|
|
case -3:
|
|
excl_short_opt = 0;
|
|
goto exclusive;
|
|
default:
|
|
break;
|
|
}
|
|
continue;
|
|
unknown:
|
|
if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
|
|
return PARSE_OPT_UNKNOWN;
|
|
ctx->out[ctx->cpidx++] = ctx->argv[0];
|
|
ctx->opt = NULL;
|
|
}
|
|
return PARSE_OPT_DONE;
|
|
|
|
exclusive:
|
|
parse_options_usage(usagestr, options, arg, excl_short_opt);
|
|
if ((excl_short_opt && ctx->excl_opt->short_name) ||
|
|
ctx->excl_opt->long_name == NULL) {
|
|
char opt = ctx->excl_opt->short_name;
|
|
parse_options_usage(NULL, options, &opt, 1);
|
|
} else {
|
|
parse_options_usage(NULL, options, ctx->excl_opt->long_name, 0);
|
|
}
|
|
return PARSE_OPT_HELP;
|
|
}
|
|
|
|
static int parse_options_end(struct parse_opt_ctx_t *ctx)
|
|
{
|
|
memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
|
|
ctx->out[ctx->cpidx + ctx->argc] = NULL;
|
|
return ctx->cpidx + ctx->argc;
|
|
}
|
|
|
|
int parse_options_subcommand(int argc, const char **argv, const struct option *options,
|
|
const char *const subcommands[], const char *usagestr[], int flags)
|
|
{
|
|
struct parse_opt_ctx_t ctx;
|
|
|
|
/* build usage string if it's not provided */
|
|
if (subcommands && !usagestr[0]) {
|
|
char *buf = NULL;
|
|
|
|
astrcatf(&buf, "%s %s [<options>] {", subcmd_config.exec_name, argv[0]);
|
|
|
|
for (int i = 0; subcommands[i]; i++) {
|
|
if (i)
|
|
astrcat(&buf, "|");
|
|
astrcat(&buf, subcommands[i]);
|
|
}
|
|
astrcat(&buf, "}");
|
|
|
|
usagestr[0] = buf;
|
|
}
|
|
|
|
parse_options_start(&ctx, argc, argv, flags);
|
|
switch (parse_options_step(&ctx, options, usagestr)) {
|
|
case PARSE_OPT_HELP:
|
|
exit(129);
|
|
case PARSE_OPT_DONE:
|
|
break;
|
|
case PARSE_OPT_LIST_OPTS:
|
|
while (options->type != OPTION_END) {
|
|
if (options->long_name)
|
|
printf("--%s ", options->long_name);
|
|
options++;
|
|
}
|
|
putchar('\n');
|
|
exit(130);
|
|
case PARSE_OPT_LIST_SUBCMDS:
|
|
if (subcommands) {
|
|
for (int i = 0; subcommands[i]; i++)
|
|
printf("%s ", subcommands[i]);
|
|
}
|
|
putchar('\n');
|
|
exit(130);
|
|
default: /* PARSE_OPT_UNKNOWN */
|
|
if (ctx.argv[0][1] == '-')
|
|
astrcatf(&error_buf, "unknown option `%s'",
|
|
ctx.argv[0] + 2);
|
|
else
|
|
astrcatf(&error_buf, "unknown switch `%c'", *ctx.opt);
|
|
usage_with_options(usagestr, options);
|
|
}
|
|
|
|
return parse_options_end(&ctx);
|
|
}
|
|
|
|
int parse_options(int argc, const char **argv, const struct option *options,
|
|
const char * const usagestr[], int flags)
|
|
{
|
|
return parse_options_subcommand(argc, argv, options, NULL,
|
|
(const char **) usagestr, flags);
|
|
}
|
|
|
|
#define USAGE_OPTS_WIDTH 24
|
|
#define USAGE_GAP 2
|
|
|
|
static void print_option_help(const struct option *opts, int full)
|
|
{
|
|
size_t pos;
|
|
int pad;
|
|
|
|
if (opts->type == OPTION_GROUP) {
|
|
fputc('\n', stderr);
|
|
if (*opts->help)
|
|
fprintf(stderr, "%s\n", opts->help);
|
|
return;
|
|
}
|
|
if (!full && (opts->flags & PARSE_OPT_HIDDEN))
|
|
return;
|
|
if (opts->flags & PARSE_OPT_DISABLED)
|
|
return;
|
|
|
|
pos = fprintf(stderr, " ");
|
|
if (opts->short_name)
|
|
pos += fprintf(stderr, "-%c", opts->short_name);
|
|
else
|
|
pos += fprintf(stderr, " ");
|
|
|
|
if (opts->long_name && opts->short_name)
|
|
pos += fprintf(stderr, ", ");
|
|
if (opts->long_name)
|
|
pos += fprintf(stderr, "--%s", opts->long_name);
|
|
|
|
switch (opts->type) {
|
|
case OPTION_ARGUMENT:
|
|
break;
|
|
case OPTION_LONG:
|
|
case OPTION_U64:
|
|
case OPTION_INTEGER:
|
|
case OPTION_UINTEGER:
|
|
if (opts->flags & PARSE_OPT_OPTARG)
|
|
if (opts->long_name)
|
|
pos += fprintf(stderr, "[=<n>]");
|
|
else
|
|
pos += fprintf(stderr, "[<n>]");
|
|
else
|
|
pos += fprintf(stderr, " <n>");
|
|
break;
|
|
case OPTION_CALLBACK:
|
|
if (opts->flags & PARSE_OPT_NOARG)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
case OPTION_STRING:
|
|
if (opts->argh) {
|
|
if (opts->flags & PARSE_OPT_OPTARG)
|
|
if (opts->long_name)
|
|
pos += fprintf(stderr, "[=<%s>]", opts->argh);
|
|
else
|
|
pos += fprintf(stderr, "[<%s>]", opts->argh);
|
|
else
|
|
pos += fprintf(stderr, " <%s>", opts->argh);
|
|
} else {
|
|
if (opts->flags & PARSE_OPT_OPTARG)
|
|
if (opts->long_name)
|
|
pos += fprintf(stderr, "[=...]");
|
|
else
|
|
pos += fprintf(stderr, "[...]");
|
|
else
|
|
pos += fprintf(stderr, " ...");
|
|
}
|
|
break;
|
|
default: /* OPTION_{BIT,BOOLEAN,SET_UINT,SET_PTR} */
|
|
case OPTION_END:
|
|
case OPTION_GROUP:
|
|
case OPTION_BIT:
|
|
case OPTION_BOOLEAN:
|
|
case OPTION_INCR:
|
|
case OPTION_SET_UINT:
|
|
case OPTION_SET_PTR:
|
|
break;
|
|
}
|
|
|
|
if (pos <= USAGE_OPTS_WIDTH)
|
|
pad = USAGE_OPTS_WIDTH - pos;
|
|
else {
|
|
fputc('\n', stderr);
|
|
pad = USAGE_OPTS_WIDTH;
|
|
}
|
|
fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
|
|
if (opts->flags & PARSE_OPT_NOBUILD)
|
|
fprintf(stderr, "%*s(not built-in because %s)\n",
|
|
USAGE_OPTS_WIDTH + USAGE_GAP, "",
|
|
opts->build_opt);
|
|
}
|
|
|
|
static int option__cmp(const void *va, const void *vb)
|
|
{
|
|
const struct option *a = va, *b = vb;
|
|
int sa = tolower(a->short_name), sb = tolower(b->short_name), ret;
|
|
|
|
if (sa == 0)
|
|
sa = 'z' + 1;
|
|
if (sb == 0)
|
|
sb = 'z' + 1;
|
|
|
|
ret = sa - sb;
|
|
|
|
if (ret == 0) {
|
|
const char *la = a->long_name ?: "",
|
|
*lb = b->long_name ?: "";
|
|
ret = strcmp(la, lb);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct option *options__order(const struct option *opts)
|
|
{
|
|
int nr_opts = 0, len;
|
|
const struct option *o = opts;
|
|
struct option *ordered;
|
|
|
|
for (o = opts; o->type != OPTION_END; o++)
|
|
++nr_opts;
|
|
|
|
len = sizeof(*o) * (nr_opts + 1);
|
|
ordered = malloc(len);
|
|
if (!ordered)
|
|
goto out;
|
|
memcpy(ordered, opts, len);
|
|
|
|
qsort(ordered, nr_opts, sizeof(*o), option__cmp);
|
|
out:
|
|
return ordered;
|
|
}
|
|
|
|
static bool option__in_argv(const struct option *opt, const struct parse_opt_ctx_t *ctx)
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; i < ctx->argc; ++i) {
|
|
const char *arg = ctx->argv[i];
|
|
|
|
if (arg[0] != '-') {
|
|
if (arg[1] == '\0') {
|
|
if (arg[0] == opt->short_name)
|
|
return true;
|
|
continue;
|
|
}
|
|
|
|
if (opt->long_name && strcmp(opt->long_name, arg) == 0)
|
|
return true;
|
|
|
|
if (opt->help && strcasestr(opt->help, arg) != NULL)
|
|
return true;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (arg[1] == opt->short_name ||
|
|
(arg[1] == '-' && opt->long_name && strcmp(opt->long_name, arg + 2) == 0))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int usage_with_options_internal(const char * const *usagestr,
|
|
const struct option *opts, int full,
|
|
struct parse_opt_ctx_t *ctx)
|
|
{
|
|
struct option *ordered;
|
|
|
|
if (!usagestr)
|
|
return PARSE_OPT_HELP;
|
|
|
|
setup_pager();
|
|
|
|
if (error_buf) {
|
|
fprintf(stderr, " Error: %s\n", error_buf);
|
|
zfree(&error_buf);
|
|
}
|
|
|
|
fprintf(stderr, "\n Usage: %s\n", *usagestr++);
|
|
while (*usagestr && **usagestr)
|
|
fprintf(stderr, " or: %s\n", *usagestr++);
|
|
while (*usagestr) {
|
|
fprintf(stderr, "%s%s\n",
|
|
**usagestr ? " " : "",
|
|
*usagestr);
|
|
usagestr++;
|
|
}
|
|
|
|
if (opts->type != OPTION_GROUP)
|
|
fputc('\n', stderr);
|
|
|
|
ordered = options__order(opts);
|
|
if (ordered)
|
|
opts = ordered;
|
|
|
|
for ( ; opts->type != OPTION_END; opts++) {
|
|
if (ctx && ctx->argc > 1 && !option__in_argv(opts, ctx))
|
|
continue;
|
|
print_option_help(opts, full);
|
|
}
|
|
|
|
fputc('\n', stderr);
|
|
|
|
free(ordered);
|
|
|
|
return PARSE_OPT_HELP;
|
|
}
|
|
|
|
void usage_with_options(const char * const *usagestr,
|
|
const struct option *opts)
|
|
{
|
|
usage_with_options_internal(usagestr, opts, 0, NULL);
|
|
exit(129);
|
|
}
|
|
|
|
void usage_with_options_msg(const char * const *usagestr,
|
|
const struct option *opts, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char *tmp = error_buf;
|
|
|
|
va_start(ap, fmt);
|
|
if (vasprintf(&error_buf, fmt, ap) == -1)
|
|
die("vasprintf failed");
|
|
va_end(ap);
|
|
|
|
free(tmp);
|
|
|
|
usage_with_options_internal(usagestr, opts, 0, NULL);
|
|
exit(129);
|
|
}
|
|
|
|
int parse_options_usage(const char * const *usagestr,
|
|
const struct option *opts,
|
|
const char *optstr, bool short_opt)
|
|
{
|
|
if (!usagestr)
|
|
goto opt;
|
|
|
|
fprintf(stderr, "\n Usage: %s\n", *usagestr++);
|
|
while (*usagestr && **usagestr)
|
|
fprintf(stderr, " or: %s\n", *usagestr++);
|
|
while (*usagestr) {
|
|
fprintf(stderr, "%s%s\n",
|
|
**usagestr ? " " : "",
|
|
*usagestr);
|
|
usagestr++;
|
|
}
|
|
fputc('\n', stderr);
|
|
|
|
opt:
|
|
for ( ; opts->type != OPTION_END; opts++) {
|
|
if (short_opt) {
|
|
if (opts->short_name == *optstr) {
|
|
print_option_help(opts, 0);
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (opts->long_name == NULL)
|
|
continue;
|
|
|
|
if (strstarts(opts->long_name, optstr))
|
|
print_option_help(opts, 0);
|
|
if (strstarts("no-", optstr) &&
|
|
strstarts(opts->long_name, optstr + 3))
|
|
print_option_help(opts, 0);
|
|
}
|
|
|
|
return PARSE_OPT_HELP;
|
|
}
|
|
|
|
|
|
int parse_opt_verbosity_cb(const struct option *opt,
|
|
const char *arg __maybe_unused,
|
|
int unset)
|
|
{
|
|
int *target = opt->value;
|
|
|
|
if (unset)
|
|
/* --no-quiet, --no-verbose */
|
|
*target = 0;
|
|
else if (opt->short_name == 'v') {
|
|
if (*target >= 0)
|
|
(*target)++;
|
|
else
|
|
*target = 1;
|
|
} else {
|
|
if (*target <= 0)
|
|
(*target)--;
|
|
else
|
|
*target = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct option *
|
|
find_option(struct option *opts, int shortopt, const char *longopt)
|
|
{
|
|
for (; opts->type != OPTION_END; opts++) {
|
|
if ((shortopt && opts->short_name == shortopt) ||
|
|
(opts->long_name && longopt &&
|
|
!strcmp(opts->long_name, longopt)))
|
|
return opts;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void set_option_flag(struct option *opts, int shortopt, const char *longopt,
|
|
int flag)
|
|
{
|
|
struct option *opt = find_option(opts, shortopt, longopt);
|
|
|
|
if (opt)
|
|
opt->flags |= flag;
|
|
return;
|
|
}
|
|
|
|
void set_option_nobuild(struct option *opts, int shortopt,
|
|
const char *longopt,
|
|
const char *build_opt,
|
|
bool can_skip)
|
|
{
|
|
struct option *opt = find_option(opts, shortopt, longopt);
|
|
|
|
if (!opt)
|
|
return;
|
|
|
|
opt->flags |= PARSE_OPT_NOBUILD;
|
|
opt->flags |= can_skip ? PARSE_OPT_CANSKIP : 0;
|
|
opt->build_opt = build_opt;
|
|
}
|