[PATCH v2 3/6] tools: mkfwumdata: Improve error message specificity

Kory Maincent
2025-12-12T16:24:12Z

Replace the generic error message with a more informative one.
This helps users quickly understand the correct command-line argument
format when the tool reports an error.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---
tools/fwumdata_src/mkfwumdata.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/fwumdata_src/mkfwumdata.c b/tools/fwumdata_src/mkfwumdata.c
index fbc2067bc12..5ceec7a2980 100644
--- a/tools/fwumdata_src/mkfwumdata.c
+++ b/tools/fwumdata_src/mkfwumdata.c
@@ -473,7 +473,9 @@ int main(int argc, char *argv[])

/* This command takes UUIDs * images and output file. */
if (optind + images + 1 != argc) {
- fprintf(stderr, "Error: UUID list or output file is not specified or too much.\n");
+ fprintf(stderr,
+ "Error: Expected %ld UUID string(s) and 1 output file, got %d argument(s).\n",
+ images, argc - optind);
print_usage();
return -ERANGE;
}

--
2.43.0