From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Thu, 3 Aug 2023 05:13:28 +0000 (+0200)
Subject: libmount: (utils) fix statx fallback
X-Git-Tag: v2.40-rc1~308^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=91c2cbdf3a04f2f3f4c4bb0d2a6053874bfa11ea;p=thirdparty%2Futil-linux.git

libmount: (utils) fix statx fallback

If the systemcall is not available ENOSYS is returned.

Under glibc the statx implementation also has its own fallback logic.
As AT_STATX_DONT_SYNC can't be implemented correctly in that fallback
logic the wrapper will return EINVAL in case the emulation is needed and
AT_STATX_DONT_SYNC is set.
So also use our own fallback in that case.

Fixes: #2409
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---

diff --git a/libmount/src/utils.c b/libmount/src/utils.c
index 50553f1d5a..410ded4aa2 100644
--- a/libmount/src/utils.c
+++ b/libmount/src/utils.c
@@ -133,7 +133,8 @@ static int safe_stat(const char *target, struct stat *st, int nofollow)
 			st->st_mode = stx.stx_mode;
 		}
 
-		if (rc == 0 || errno != EOPNOTSUPP)
+		if (rc == 0 ||
+		    (errno != EOPNOTSUPP && errno != ENOSYS && errno != EINVAL))
 			return rc;
 	}
 #endif