diff options
Diffstat (limited to 'tools/lib/subcmd/parse-options.c')
| -rw-r--r-- | tools/lib/subcmd/parse-options.c | 983 |
1 files changed, 983 insertions, 0 deletions
diff --git a/tools/lib/subcmd/parse-options.c b/tools/lib/subcmd/parse-options.c new file mode 100644 index 000000000..981bb4481 --- /dev/null +++ b/tools/lib/subcmd/parse-options.c @@ -0,0 +1,983 @@ +#include <linux/compiler.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); + + /* 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; + *(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; + *(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) +{ + 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) { + if (!prefixcmp(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 (!prefixcmp(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 (!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; + } +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); + return -2; +} + +static void check_typos(const char *arg, const struct option *options) +{ + if (strlen(arg) < 3) + return; + + if (!prefixcmp(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 (!prefixcmp(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 (!prefixcmp(opts->long_name, optstr)) + print_option_help(opts, 0); + if (!prefixcmp("no-", optstr) && + !prefixcmp(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; +} |