From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Sat, 24 Dec 2022 16:32:50 +0000 (+0000)
Subject: lib: procfs: fix error message during test
X-Git-Tag: v2.39-rc1~356^2~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=758730c0b53f97282b324f88fc3d328efdf14468;p=thirdparty%2Futil-linux.git

lib: procfs: fix error message during test

procfs_process_get_stat_nth() returns the error and does not set errno.
---

diff --git a/lib/procfs.c b/lib/procfs.c
index e5c30ed578..e7a4cee80c 100644
--- a/lib/procfs.c
+++ b/lib/procfs.c
@@ -581,7 +581,7 @@ static int test_process_stat_nth(int argc, char *argv[])
 	pid_t pid;
 	struct path_cxt *pc;
 	uintmax_t num = 0;
-	int n;
+	int n, ret;
 
 	if (argc != 3)
 		return EXIT_FAILURE;
@@ -592,8 +592,9 @@ static int test_process_stat_nth(int argc, char *argv[])
 	if (!pc)
 		err(EXIT_FAILURE, "cannot alloc procfs handler");
 
-	if (procfs_process_get_stat_nth(pc, n, &num) != 0)
-		err(EXIT_FAILURE, "read %dth number failed", n);
+	ret = procfs_process_get_stat_nth(pc, n, &num);
+	if (ret)
+		errx(EXIT_FAILURE, "read %dth number failed: %s", n, strerror(-ret));
 
 	printf("%d: %dth %ju\n", (int) pid, n, num);
 	ul_unref_path(pc);