[PATCH 3/4] parseopt: make usage optional
From: René Scharfe <hidden>
Date: 2016-06-15 22:46:21
Subsystem:
the rest · Maintainer:
Linus Torvalds
Allow usagestr to be NULL and don't display anything a help screen in this case. This is useful to implement incremental parsers. Signed-off-by: Rene Scharfe <redacted> --- parse-options.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/parse-options.c b/parse-options.c
index 8b21dea..51e804b 100644
--- a/parse-options.c
+++ b/parse-options.c@@ -364,6 +364,9 @@ int parse_options(int argc, const char **argv, const struct option *options, int usage_with_options_internal(const char * const *usagestr, const struct option *opts, int full) { + if (!usagestr) + return PARSE_OPT_HELP; + fprintf(stderr, "usage: %s\n", *usagestr++); while (*usagestr && **usagestr) fprintf(stderr, " or: %s\n", *usagestr++);
--
1.6.2