Add a parseopt flag, PARSE_OPT_NO_INTERNAL_HELP, that turns off internal
handling of -h, --help and --help-all. This allows the implementation
of custom help option handlers or incremental parsers.
Signed-off-by: Rene Scharfe <rene.scharfe@xxxxxxxxxxxxxx>
---
parse-options.c | 10 ++++++----
parse-options.h | 1 +
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/parse-options.c b/parse-options.c
index 39808ae..8b21dea 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -253,6 +253,8 @@ 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;
@@ -268,7 +270,7 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
if (arg[1] != '-') {
ctx->opt = arg + 1;
- if (*ctx->opt == 'h')
+ if (internal_help && *ctx->opt == 'h')
return parse_options_usage(usagestr, options);
switch (parse_short_opt(ctx, options)) {
case -1:
@@ -279,7 +281,7 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
if (ctx->opt)
check_typos(arg + 1, options);
while (ctx->opt) {
- if (*ctx->opt == 'h')
+ if (internal_help && *ctx->opt == 'h')
return parse_options_usage(usagestr, options);
switch (parse_short_opt(ctx, options)) {
case -1:
@@ -306,9 +308,9 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
break;
}
- if (!strcmp(arg + 2, "help-all"))
+ if (internal_help && !strcmp(arg + 2, "help-all"))
return usage_with_options_internal(usagestr, options, 1);
- if (!strcmp(arg + 2, "help"))
+ if (internal_help && !strcmp(arg + 2, "help"))
return parse_options_usage(usagestr, options);
switch (parse_long_opt(ctx, arg + 2, options)) {
case -1:
diff --git a/parse-options.h b/parse-options.h
index b7d08b1..f8ef1db 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -22,6 +22,7 @@ enum parse_opt_flags {
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 {
--
1.6.2
--
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