GNU bug report logs - #39670
Cannot mount NFS share as user or root

Previous Next

Full log

View this message in rfc822 format

From: maxim.cournoyer <at> gmail.com
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: Nathan Dehnel <ncdehnel <at> gmail.com>, 39670 <at> debbugs.gnu.org
Subject: bug#39670: Cannot mount NFS share as user or root
Date: Thu, 20 Feb 2020 11:25:37 -0500

Hello,

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>
> I encountered this too.  Perhaps we should patch some references to
> mount.nfs (from nfs-utils) in the util-linux package which provides
> 'mount'.
>
> In the meantime, you should use "mount.nfs" directly.

I've looked into patching util-linux to reference explicitly the
mount.nfs helper, and I think this should do it:

--8<---------------cut here---------------start------------->8---
modified   libmount/src/context.c
@@ -1939,8 +1939,13 @@ int mnt_context_prepare_helper(struct libmnt_context *cxt, const char *name,
 		struct stat st;
 		int rc;
 
-		rc = snprintf(helper, sizeof(helper), "%s/%s.%s",
-						path, name, type);
+		if (startswith(type, "nfs")) {
+		  rc = snprintf(helper, sizeof(helper), "/gnu/store/c7kpr1jh5z3mrkz0yw9am86851y57cq7-nfs-utils-2.4.2/sbin/mount.nfs");
+		} else {
+		  rc = snprintf(helper, sizeof(helper), "%s/%s.%s",
+				path, name, type);
+		}
+
 		path = strtok_r(NULL, ":", &p);
 
 		if (rc < 0 || (size_t) rc >= sizeof(helper))

--8<---------------cut here---------------end--------------->8---

But, adding nfs-utils to util-linux creates a dependency cycle which is
bothersome to resolve (nfs-utils requires eudev through lvm2, as well as
util-linux itself).

I've also realised that when I was using 'sudo mount.nfs ...' it
wouldn't work because it'd look up the root user's PATH for the helper.
'sudo -E mount.nfs ...' should work.

We should document that the 'nfs-utils' package needs to be added to the
operating system declaration packages field when NFS file systems are
used.

Maxim

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.