From: Karel Zak <kzak@redhat.com>
Date: Fri, 21 Jan 2022 11:24:43 +0000 (+0100)
Subject: findmnt: add reason to "cannot detect on-disk filesystem type" warning
X-Git-Tag: v2.38-rc1~43
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e209dd35d2b116e0b8ccf3dd0436a0783cc4e572;p=thirdparty%2Futil-linux.git

findmnt: add reason to "cannot detect on-disk filesystem type" warning

References: https://unix.stackexchange.com/questions/563688/findmnt-verify-gives-warning-cannot-detect-on-disk-filesystem-type
Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/misc-utils/findmnt-verify.c b/misc-utils/findmnt-verify.c
index 624c7205e8..609638c4d1 100644
--- a/misc-utils/findmnt-verify.c
+++ b/misc-utils/findmnt-verify.c
@@ -443,13 +443,17 @@ static int verify_fstype(struct verify_context *vfy)
 		if (!isswap && !isauto && !none && !is_supported_filesystem(vfy, type))
 			verify_warn(vfy, _("%s seems unsupported by the current kernel"), type);
 	}
+
+	errno = 0;
 	realtype = mnt_get_fstype(src, &ambi, cache);
 
 	if (!realtype) {
+		const char *reson = errno ? strerror(errno) : _("reason uknown");
+
 		if (isauto)
-			verify_err(vfy, _("cannot detect on-disk filesystem type"));
+			verify_err(vfy, _("cannot detect on-disk filesystem type (%s)"), reson);
 		else
-			verify_warn(vfy, _("cannot detect on-disk filesystem type"));
+			verify_warn(vfy, _("cannot detect on-disk filesystem type (%s)"), reson);
 		goto done;
 	}