From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Sun, 30 Apr 2023 08:18:20 +0000 (+0200)
Subject: tests: (test_sysinfo) add helper for invalid ioctl errno
X-Git-Tag: v2.39~39^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=eefdc51113c50798f7b332e9dc48c6631ec9c841;p=thirdparty%2Futil-linux.git

tests: (test_sysinfo) add helper for invalid ioctl errno

This can be used to detect qemu-user returning ENOSYS for invalid ioctl
numbers.

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---

diff --git a/tests/functions.sh b/tests/functions.sh
index 3d2c93d77a..71d716781e 100644
--- a/tests/functions.sh
+++ b/tests/functions.sh
@@ -137,6 +137,15 @@ function ts_check_native_byteorder {
 	fi
 }
 
+function ts_check_enotty {
+	# https://lore.kernel.org/qemu-devel/20230426070659.80649-1-thomas@t-8ch.de/
+	if [ -e "$TS_HELPER_SYSINFO" ] &&
+		[ "$("$TS_HELPER_SYSINFO" enotty-ok)" = "0" ]; then
+
+		ts_skip "broken ENOTTY return"
+	fi
+}
+
 function ts_report_skip {
 	ts_report " SKIPPED ($1)"
 }
diff --git a/tests/helpers/test_sysinfo.c b/tests/helpers/test_sysinfo.c
index ef7515c120..82227ca3f2 100644
--- a/tests/helpers/test_sysinfo.c
+++ b/tests/helpers/test_sysinfo.c
@@ -24,6 +24,8 @@
 #include <stdint.h>
 #include <inttypes.h>
 #include <wchar.h>
+#include <errno.h>
+#include <sys/ioctl.h>
 
 typedef struct {
 	const char	*name;
@@ -99,6 +101,15 @@ static int hlp_wcsspn_ok(void)
 	return 0;
 }
 
+static int hlp_enotty_ok(void)
+{
+	errno = 0;
+	ioctl(STDOUT_FILENO, 0);
+
+	printf("%d\n", errno != ENOSYS);
+	return 0;
+}
+
 static mntHlpfnc hlps[] =
 {
 	{ "WORDSIZE",	hlp_wordsize	},
@@ -111,6 +122,7 @@ static mntHlpfnc hlps[] =
 	{ "UINT64_MAX", hlp_u64_max     },
 	{ "byte-order", hlp_endianness  },
 	{ "wcsspn-ok",  hlp_wcsspn_ok   },
+	{ "enotty-ok",  hlp_enotty_ok   },
 	{ NULL, NULL }
 };