Date: Mon, 01 Feb 1999 17:08:06 +0100 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: freebsd-stable@FreeBSD.ORG Subject: mount: .: Permission denied ???? Message-ID: <36B5D166.9CE4A52B@we.lc.ehu.es>
next in thread | raw e-mail | index | archive | help
I am looking for an explanation to this phenomenom. If, as root,
I have no permission to read or write my working directory
(because it is being NFS-mounted), and I try to run "mount",
I get a "mount: .: Permission denied" message. Why?
A syscall trace is not very helpful:
# truss mount -t null /usr/ports /mnt
syscall readlink("/etc/malloc.conf",0xefbfdac8,63)
errno 2 'No such file or directory'
syscall mmap(0x0,4096,0x3,0x1002,-1,0x0)
returns 671555584 (0x28072000)
syscall break(0x807e000)
returns 0 (0x0)
syscall break(0x807f000)
returns 0 (0x0)
syscall open(".",0,00)
errno 13 'Permission denied'
mount: syscall write(2,0xefbfc90c,7)
returns 7 (0x7)
.syscall write(2,0xefbfc920,1)
returns 1 (0x1)
: syscall write(2,0xefbfc904,2)
returns 2 (0x2)
Permission denied
syscall write(2,0xefbfc908,18)
returns 18 (0x12)
syscall exit(0x1)
process exit, rval = 256
At the very beginning, mount tries to open() the working directory.
The code that makes this syscall does not belong to main().
I think that there is an explanation to this behaviour...
-- JMA
-----------------------------------------------------------------------
José Mª Alcaide | mailto:jose@we.lc.ehu.es
Universidad del País Vasco | http://www.we.lc.ehu.es/~jose
Dpto. de Electricidad y Electrónica |
Facultad de Ciencias - Campus de Lejona | Tel.: +34-946012479
48940 Lejona (Vizcaya) - SPAIN | Fax: +34-944858139
-----------------------------------------------------------------------
"Go ahead... make my day." - H. Callahan
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?36B5D166.9CE4A52B>