Date: Thu, 27 Feb 2020 15:39:37 -0800 From: Alan Batie <alan@peak.org> To: Luoqi Chen <luoqi.chen@gmail.com> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Linux could write to read only files on FreeBSD NFS server Message-ID: <751dcbf4-9cd6-0d6f-a9d9-38615966cf9d@peak.org> In-Reply-To: <CAHJqQjtLA9sFgczxC3xRZVXj6QzK-xLyz-R_L5y68vq8bw=xEg@mail.gmail.com> References: <CAHJqQjuEVpL4xV1dAf6scFqFfMNm1gY3jOaO64ZQJTCQi_qzcQ@mail.gmail.com> <707243CD-C67E-4DAD-AC5A-68EC11CFFDFD@lysator.liu.se> <6EC06026-DA28-4CAC-8D56-5C7856D4625E@lysator.liu.se> <YTBPR01MB3374713F573B548791A22F98DDEB0@YTBPR01MB3374.CANPRD01.PROD.OUTLOOK.COM> <CAHJqQjsP-w9LAS4AV64Pu9Jmv0kVFodKdT_jLUcyop3sNVh_EA@mail.gmail.com> <d73aea39-c5c2-e8ce-3745-bfd49fd69664@peak.org> <CAHJqQjtLA9sFgczxC3xRZVXj6QzK-xLyz-R_L5y68vq8bw=xEg@mail.gmail.com>
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On 2/27/20 3:31 PM, Luoqi Chen wrote:
> Yes, except to leave the read bit(s) on. I can confirm that the write w=
ould
> fail on centos 6/7/8 if all bits are cleared.
>=20
That makes no difference:
<zmail03-admin.peak.org> [117] $ sh -x ~/nfst
+ cat /etc/redhat-release
CentOS release 6.10 (Final)
+ df .
Filesystem 1K-blocks Used Available Use% Mounted on
zbackups02.peak.org:/zbackups/zmail03-admin
5027215872 91682304 4935533568 2% /zbackups
+ rm -f x
+ touch x
+ chmod 444 x
+ ls -l x
-r--r--r--. 1 alan root 0 Feb 27 15:38 x
+ echo foo
/home/alan/nfst: line 9: x: Permission denied
+ cat x
<zmail03-admin.peak.org> [118] $
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