NetBSD Problem Report #54381
From www@netbsd.org Tue Jul 16 12:49:52 2019
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Date: Tue, 16 Jul 2019 12:49:50 +0000 (UTC)
From: tobiasu@tmux.org
Reply-To: tobiasu@tmux.org
To: gnats-bugs@NetBSD.org
Subject: cp read-only-file /to/psshfs/ returns EPERM
X-Send-Pr-Version: www-1.0
>Number: 54381
>Category: kern
>Synopsis: cp read-only-file /to/psshfs/ returns EPERM
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Jul 16 12:50:00 +0000 2019
>Originator: Tobias Ulmer
>Release: NetBSD 8.99.50
>Organization:
>Environment:
NetBSD phenom.tmux.org 8.99.50 NetBSD 8.99.50 (GENERIC) #0: Fri Jul 12 10:39:12 UTC 2019 mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
Copy a user owned read-only file to a user writable psshfs mountpoint like so:
tobiasu@phenom:tobiasu$ ./tfs
+ rm -f rw ro mnt/rw mnt/ro rw.log ro.log
+ echo rw >rw
+ echo ro >ro
+ chmod 444 ro
+ ktruss cp rw mnt/ >rw.log
+ ktruss cp ro mnt/ >ro.log
cp: mnt/ro: Operation not permitted
huh?
"rw" does what you expect:
1010 1 cp __stat50("rw", 0x7a15bdb4c1b8) = 0
1010 1 cp __stat50("mnt/rw", 0x7f7fffab5fc0) Err#2 ENOENT
1010 1 cp open("rw", 0, 0) = 3
1010 1 cp open("mnt/rw", 0x601, 0x81b4) = 4
0x81b4 = 0100664
"ro" uses a different file mask:
161 1 cp __stat50("ro", 0x6fcf05dd21b8) = 0
161 1 cp __stat50("mnt/ro", 0x7f7fff750ca0) Err#2 ENOENT
161 1 cp open("ro", 0, 0) = 3
161 1 cp open("mnt/ro", 0x601, 0x8124) Err#1 EPERM
0x8124 = 0100444
>How-To-Repeat:
>Fix:
(Contact us)
$NetBSD: query-full-pr,v 1.43 2018/01/16 07:36:43 maya Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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