From: Kory Maincent <kory.maincent@bootlin.com>
Date: Mon, 23 Feb 2026 13:18:37 +0000 (+0100)
Subject: tools: mkfwumdata: Improve error message specificity
X-Git-Tag: v2026.07-rc1~63^2~7^2~3
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=bcae1381f88f2122658b3aaacb04b4ea2a873a36;p=thirdparty%2Fu-boot.git

tools: mkfwumdata: Improve error message specificity

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>
Tested-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---

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;
 	}