From a043b60f1eabcdd72f30b692565a2c982b1a1e8a Mon Sep 17 00:00:00 2001
From: Rich Ercolani <214141+rincebrain@users.noreply.github.com>
Date: Thu, 16 May 2024 18:37:50 -0400
Subject: [PATCH] Correct level handling in zstream recompress.

sscanf returns number of items parsed on success and EOF on failure.

Reviewed-by: Adam Moss <c@yotes.com>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #16198
---
 cmd/zstream/zstream_recompress.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/zstream/zstream_recompress.c b/cmd/zstream/zstream_recompress.c
index 8392ef3de72f..f9e01d1aa4c4 100644
--- a/cmd/zstream/zstream_recompress.c
+++ b/cmd/zstream/zstream_recompress.c
@@ -77,7 +77,7 @@ zstream_do_recompress(int argc, char *argv[])
 	while ((c = getopt(argc, argv, "l:")) != -1) {
 		switch (c) {
 		case 'l':
-			if (sscanf(optarg, "%d", &level) != 0) {
+			if (sscanf(optarg, "%d", &level) != 1) {
 				fprintf(stderr,
 				    "failed to parse level '%s'\n",
 				    optarg);