mirror of https://gitee.com/openkylin/linux.git
536 lines
13 KiB
C
536 lines
13 KiB
C
#include "util.h"
|
|
#include "parse-options.h"
|
|
#include "cache.h"
|
|
|
|
#define OPT_SHORT 1
|
|
#define OPT_UNSET 2
|
|
|
|
static int opterror(const struct option *opt, const char *reason, int flags)
|
|
{
|
|
if (flags & OPT_SHORT)
|
|
return error("switch `%c' %s", opt->short_name, reason);
|
|
if (flags & OPT_UNSET)
|
|
return error("option `no-%s' %s", opt->long_name, reason);
|
|
return error("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)
|
|
{
|
|
if (p->opt) {
|
|
*arg = p->opt;
|
|
p->opt = NULL;
|
|
} else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 ||
|
|
**(p->argv + 1) == '-')) {
|
|
*arg = (const char *)opt->defval;
|
|
} else if (p->argc > 1) {
|
|
p->argc--;
|
|
*arg = *++p->argv;
|
|
} else
|
|
return opterror(opt, "requires a value", flags);
|
|
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;
|
|
|
|
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 (!(flags & OPT_SHORT) && p->opt) {
|
|
switch (opt->type) {
|
|
case OPTION_CALLBACK:
|
|
if (!(opt->flags & PARSE_OPT_NOARG))
|
|
break;
|
|
/* FALLTHROUGH */
|
|
case OPTION_BOOLEAN:
|
|
case OPTION_BIT:
|
|
case OPTION_SET_INT:
|
|
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_LONG:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (opt->type) {
|
|
case OPTION_BIT:
|
|
if (unset)
|
|
*(int *)opt->value &= ~opt->defval;
|
|
else
|
|
*(int *)opt->value |= opt->defval;
|
|
return 0;
|
|
|
|
case OPTION_BOOLEAN:
|
|
*(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
|
|
return 0;
|
|
|
|
case OPTION_SET_INT:
|
|
*(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:
|
|
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
|
|
return get_arg(p, opt, flags, (const char **)opt->value);
|
|
return 0;
|
|
|
|
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_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_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)
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
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);
|
|
|
|
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) {
|
|
/* 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 (!prefixcmp("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 && !prefixcmp(options->long_name, arg + 3))
|
|
goto is_abbreviated;
|
|
if (!rest)
|
|
continue;
|
|
}
|
|
if (*rest) {
|
|
if (*rest != '=')
|
|
continue;
|
|
p->opt = rest + 1;
|
|
}
|
|
return get_value(p, options, flags);
|
|
}
|
|
|
|
if (ambiguous_option)
|
|
return 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);
|
|
if (abbrev_option)
|
|
return get_value(p, abbrev_option, abbrev_flags);
|
|
return -2;
|
|
}
|
|
|
|
static void check_typos(const char *arg, const struct option *options)
|
|
{
|
|
if (strlen(arg) < 3)
|
|
return;
|
|
|
|
if (!prefixcmp(arg, "no-")) {
|
|
error ("did you mean `--%s` (with two dashes ?)", arg);
|
|
exit(129);
|
|
}
|
|
|
|
for (; options->type != OPTION_END; options++) {
|
|
if (!options->long_name)
|
|
continue;
|
|
if (!prefixcmp(options->long_name, arg)) {
|
|
error ("did you mean `--%s` (with two dashes ?)", arg);
|
|
exit(129);
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
/* we must reset ->opt, unknown short option leave it dangling */
|
|
ctx->opt = NULL;
|
|
|
|
for (; ctx->argc; ctx->argc--, ctx->argv++) {
|
|
const char *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 + 1;
|
|
if (internal_help && *ctx->opt == 'h')
|
|
return parse_options_usage(usagestr, options);
|
|
switch (parse_short_opt(ctx, options)) {
|
|
case -1:
|
|
return parse_options_usage(usagestr, options);
|
|
case -2:
|
|
goto unknown;
|
|
default:
|
|
break;
|
|
}
|
|
if (ctx->opt)
|
|
check_typos(arg + 1, options);
|
|
while (ctx->opt) {
|
|
if (internal_help && *ctx->opt == 'h')
|
|
return parse_options_usage(usagestr, options);
|
|
switch (parse_short_opt(ctx, options)) {
|
|
case -1:
|
|
return parse_options_usage(usagestr, options);
|
|
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;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (!arg[2]) { /* "--" */
|
|
if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
|
|
ctx->argc--;
|
|
ctx->argv++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (internal_help && !strcmp(arg + 2, "help-all"))
|
|
return usage_with_options_internal(usagestr, options, 1);
|
|
if (internal_help && !strcmp(arg + 2, "help"))
|
|
return parse_options_usage(usagestr, options);
|
|
switch (parse_long_opt(ctx, arg + 2, options)) {
|
|
case -1:
|
|
return parse_options_usage(usagestr, options);
|
|
case -2:
|
|
goto unknown;
|
|
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;
|
|
}
|
|
|
|
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(int argc, const char **argv, const struct option *options,
|
|
const char * const usagestr[], int flags)
|
|
{
|
|
struct parse_opt_ctx_t ctx;
|
|
|
|
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;
|
|
default: /* PARSE_OPT_UNKNOWN */
|
|
if (ctx.argv[0][1] == '-') {
|
|
error("unknown option `%s'", ctx.argv[0] + 2);
|
|
} else {
|
|
error("unknown switch `%c'", *ctx.opt);
|
|
}
|
|
usage_with_options(usagestr, options);
|
|
}
|
|
|
|
return parse_options_end(&ctx);
|
|
}
|
|
|
|
#define USAGE_OPTS_WIDTH 24
|
|
#define USAGE_GAP 2
|
|
|
|
int usage_with_options_internal(const char * const *usagestr,
|
|
const struct option *opts, int full)
|
|
{
|
|
if (!usagestr)
|
|
return PARSE_OPT_HELP;
|
|
|
|
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);
|
|
|
|
for (; opts->type != OPTION_END; opts++) {
|
|
size_t pos;
|
|
int pad;
|
|
|
|
if (opts->type == OPTION_GROUP) {
|
|
fputc('\n', stderr);
|
|
if (*opts->help)
|
|
fprintf(stderr, "%s\n", opts->help);
|
|
continue;
|
|
}
|
|
if (!full && (opts->flags & PARSE_OPT_HIDDEN))
|
|
continue;
|
|
|
|
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_INTEGER:
|
|
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_INT,SET_PTR} */
|
|
case OPTION_END:
|
|
case OPTION_GROUP:
|
|
case OPTION_BIT:
|
|
case OPTION_BOOLEAN:
|
|
case OPTION_SET_INT:
|
|
case OPTION_SET_PTR:
|
|
case OPTION_LONG:
|
|
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);
|
|
}
|
|
fputc('\n', stderr);
|
|
|
|
return PARSE_OPT_HELP;
|
|
}
|
|
|
|
void usage_with_options(const char * const *usagestr,
|
|
const struct option *opts)
|
|
{
|
|
exit_browser(false);
|
|
usage_with_options_internal(usagestr, opts, 0);
|
|
exit(129);
|
|
}
|
|
|
|
int parse_options_usage(const char * const *usagestr,
|
|
const struct option *opts)
|
|
{
|
|
return usage_with_options_internal(usagestr, opts, 0);
|
|
}
|
|
|
|
|
|
int parse_opt_verbosity_cb(const struct option *opt, const char *arg __used,
|
|
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;
|
|
}
|