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From: "Pádraig Brady" <P@draigBrady.com>
To: Paul Eggert <eggert@cs.ucla.edu>,
	bug-gnulib@gnu.org, Florian Weimer <fweimer@redhat.com>,
	Kamil Dudka <kdudka@redhat.com>
Subject: Re: [PATCH] fchmodat, lchmod: port to buggy Linux filesystems
Date: Mon, 9 Mar 2020 17:30:06 +0000	[thread overview]
Message-ID: <13dc64af-873a-deff-276f-5a10f4a0f609@draigBrady.com> (raw)
In-Reply-To: <20200213184209.34020-1-eggert@cs.ucla.edu>

On 13/02/2020 18:42, Paul Eggert wrote:
> Problem reported by Florian Weimer in:
> https://www.sourceware.org/ml/libc-alpha/2020-02/msg00534.html

A very similar "ENOTSUP" problem is being reported with coreutils-8.32
with `mknod -m 666 /dev/random c 1 8` when trying to build Fedora rawhide in a chroot.
https://bugzilla.redhat.com/1811038

BTW I see a possible small issue in lchmod.c in this code:

+  if (chmod_errno != ENOENT)
+    {
+      errno = chmod_errno;
+      return chmod_result;
+    }

Shouldn't that also check for other lookup errors like ENOTDIR and ELOOP ?

Also mknod() in coreutils is calling lchmod().
Shouldn't it be just calling chmod() as if mknod() was passed a
symlink, then it would have already failed with EEXIST?

cheers,
Pádraig


  parent reply	other threads:[~2020-03-09 17:30 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-13 18:42 [PATCH] fchmodat, lchmod: port to buggy Linux filesystems Paul Eggert
2020-02-14  3:29 ` Bruno Haible
2020-02-16 17:24   ` Bruno Haible
2020-02-16 18:31     ` Paul Eggert
2020-02-16 18:58       ` Bruno Haible
2020-02-14  3:46 ` Bruno Haible
2020-02-14 21:02   ` Paul Eggert
2020-02-16 21:38     ` Bruno Haible
2020-02-16 22:28       ` Bruno Haible
2020-02-22 23:46       ` Bruno Haible
2020-02-23  8:15         ` Paul Eggert
2020-02-23 10:58           ` Bruno Haible
2020-02-23 23:56             ` Paul Eggert
2020-02-24  2:27               ` overriding glibc stub functions Bruno Haible
2020-02-24  7:44                 ` Paul Eggert
2020-02-23  1:35 ` [PATCH] fchmodat, lchmod: port to buggy Linux filesystems Bruno Haible
2020-02-23  7:22   ` Paul Eggert
2020-03-09 17:30 ` Pádraig Brady [this message]
2020-03-09 18:51   ` Paul Eggert
2020-03-09 23:45     ` Pádraig Brady
2020-03-10 11:52       ` Florian Weimer
2020-03-10 15:09         ` Kamil Dudka
2020-03-10 19:27         ` Pádraig Brady
2020-03-10 19:30           ` Florian Weimer
2020-03-11  8:03             ` Paul Eggert
2020-03-11  8:45               ` Florian Weimer
2020-03-11 16:04                 ` Paul Eggert
2020-03-11  8:25             ` Paul Eggert
2020-03-11  8:40               ` Florian Weimer
2020-03-11  9:04             ` Kamil Dudka
2020-03-11 16:36               ` Paul Eggert

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