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-rw-r--r--tools/perf/util/parse-options.c110
1 files changed, 93 insertions, 17 deletions
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index bf48092983c6..01626be2a8eb 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -37,12 +37,32 @@ static int get_value(struct parse_opt_ctx_t *p,
{
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) {
+ scnprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
+ p->excl_opt->short_name);
+ } else {
+ scnprintf(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:
@@ -95,13 +115,29 @@ static int get_value(struct parse_opt_ctx_t *p,
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
- return get_arg(p, opt, flags, (const char **)opt->value);
- return 0;
+ 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)
@@ -343,13 +379,14 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
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++) {
- const char *arg = ctx->argv[0];
-
+ arg = ctx->argv[0];
if (*arg != '-' || !arg[1]) {
if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
break;
@@ -358,19 +395,21 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
}
if (arg[1] != '-') {
- ctx->opt = arg + 1;
+ ctx->opt = ++arg;
if (internal_help && *ctx->opt == 'h')
return usage_with_options_internal(usagestr, options, 0);
switch (parse_short_opt(ctx, options)) {
case -1:
- return parse_options_usage(usagestr, options, arg + 1, 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 + 1, options);
+ check_typos(arg, options);
while (ctx->opt) {
if (internal_help && *ctx->opt == 'h')
return usage_with_options_internal(usagestr, options, 0);
@@ -387,6 +426,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
ctx->argv[0] = strdup(ctx->opt - 1);
*(char *)ctx->argv[0] = '-';
goto unknown;
+ case -3:
+ goto exclusive;
default:
break;
}
@@ -402,19 +443,23 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
break;
}
- if (internal_help && !strcmp(arg + 2, "help-all"))
+ arg += 2;
+ if (internal_help && !strcmp(arg, "help-all"))
return usage_with_options_internal(usagestr, options, 1);
- if (internal_help && !strcmp(arg + 2, "help"))
+ if (internal_help && !strcmp(arg, "help"))
return usage_with_options_internal(usagestr, options, 0);
- if (!strcmp(arg + 2, "list-opts"))
+ if (!strcmp(arg, "list-opts"))
return PARSE_OPT_LIST_OPTS;
- if (!strcmp(arg + 2, "list-cmds"))
+ if (!strcmp(arg, "list-cmds"))
return PARSE_OPT_LIST_SUBCMDS;
- switch (parse_long_opt(ctx, arg + 2, options)) {
+ switch (parse_long_opt(ctx, arg, options)) {
case -1:
- return parse_options_usage(usagestr, options, arg + 2, 0);
+ return parse_options_usage(usagestr, options, arg, 0);
case -2:
goto unknown;
+ case -3:
+ excl_short_opt = 0;
+ goto exclusive;
default:
break;
}
@@ -426,6 +471,17 @@ unknown:
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;
}
int parse_options_end(struct parse_opt_ctx_t *ctx)
@@ -466,13 +522,18 @@ int parse_options_subcommand(int argc, const char **argv, const struct option *o
break;
case PARSE_OPT_LIST_OPTS:
while (options->type != OPTION_END) {
- printf("--%s ", options->long_name);
+ if (options->long_name)
+ printf("--%s ", options->long_name);
options++;
}
+ putchar('\n');
exit(130);
case PARSE_OPT_LIST_SUBCMDS:
- for (int i = 0; subcommands[i]; i++)
- printf("%s ", subcommands[i]);
+ 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] == '-') {
@@ -509,6 +570,8 @@ static void print_option_help(const struct option *opts, int full)
}
if (!full && (opts->flags & PARSE_OPT_HIDDEN))
return;
+ if (opts->flags & PARSE_OPT_DISABLED)
+ return;
pos = fprintf(stderr, " ");
if (opts->short_name)
@@ -679,3 +742,16 @@ int parse_opt_verbosity_cb(const struct option *opt,
}
return 0;
}
+
+void set_option_flag(struct option *opts, int shortopt, const char *longopt,
+ int flag)
+{
+ for (; opts->type != OPTION_END; opts++) {
+ if ((shortopt && opts->short_name == shortopt) ||
+ (opts->long_name && longopt &&
+ !strcmp(opts->long_name, longopt))) {
+ opts->flags |= flag;
+ break;
+ }
+ }
+}
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