* [9fans] auth/changeuser from drawterm
@ 2008-03-20 9:28 Christian Kellermann
2008-03-20 11:03 ` Christian Kellermann
2008-03-20 13:20 ` erik quanstrom
0 siblings, 2 replies; 4+ messages in thread
From: Christian Kellermann @ 2008-03-20 9:28 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
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Dear 9fans,
in order to be able to do administrative tasks through drawterm I
habe added the following to my cpurc:
srvfs nimda /
Then I expected to mount /mnt/keys and friends in a drawterm as
bootes like this:
mount -bc /srv/nimda /
A ls /mnt/keys now shows the existing loaded keys. A auth/changeuser
joe now sits there indefinitely and does nothing it seems (ps shows
Pread).
Mr. Diaz uses a mount -c / bind -b combination of the srvfs mntpoint
for serviente but this approach does have the same results for me.
Question time:
1. is mount -bc /srv/foo / the same as mount -c /srv/foo /n/root
bind -b /n/root /?
2. Why does auth/changeuser have this behaviour?
3. How can I find out what's going on?
Thanks for your attention!
Kind regards,
Christian
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* Re: [9fans] auth/changeuser from drawterm
2008-03-20 9:28 [9fans] auth/changeuser from drawterm Christian Kellermann
@ 2008-03-20 11:03 ` Christian Kellermann
2008-03-20 11:11 ` Christian Kellermann
2008-03-20 13:20 ` erik quanstrom
1 sibling, 1 reply; 4+ messages in thread
From: Christian Kellermann @ 2008-03-20 11:03 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
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To give you some more information:
It seems that auth/changeuser hangs in reading from /dev/cons:
cpu% ps | grep changeuser
bootes 2276 0:00 0:00 72K Pread changeuser
cpu% acid 2276
/proc/2276/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: stk()
pread()+0x7 /sys/src/libc/9syscall/pread.s:5
read(fd=0x4,buf=0xdfffef09,n=0x1)+0x2f /sys/src/libc/9sys/read.c:7
readln(prompt=0xe31c,raw=0x1,line=0xdfffef09,len=0x20)+0xcf /sys/src/cmd/auth/lib/readln.c:84
getpass(pass=0xdfffef09,confirm=0x1,key=0xdfffef49,check=0x1)+0x39 /sys/src/cmd/auth/lib/readln.c:18
main(argv=0xdfffefa8,argc=0x1)+0x1bf /sys/src/cmd/auth/changeuser.c:65
_main+0x31 /sys/src/libc/386/main9.s:16
acid:
Fd 4 is /dev/cons in this case...
This happens when doing any of the following:
drawterm to the machine as some user, then cpu'ing to localhost, then mounting the served root and calling auth/changeuser.
drawterm to the machine as bootes, omitting the cpu call and proceed as above
This all happens with auth/debug as well, which has been known to work with drawterm to my knowledge.
Kind regards,
Christian
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You may use my gpg key for replies:
pub 1024D/47F79788 2005/02/02 Christian Kellermann (C-Keen)
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* Re: [9fans] auth/changeuser from drawterm
2008-03-20 11:03 ` Christian Kellermann
@ 2008-03-20 11:11 ` Christian Kellermann
0 siblings, 0 replies; 4+ messages in thread
From: Christian Kellermann @ 2008-03-20 11:11 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
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gdiaz found my error: of course if I buÃnd -b /n/root / /dev/cons
of the server is used and not one of the stacked from the drawterms...
just binding the mnt dir resolves this issue.
I officially owe gdiaz some beer.
Sorry for the noise!
Christian
--
You may use my gpg key for replies:
pub 1024D/47F79788 2005/02/02 Christian Kellermann (C-Keen)
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [9fans] auth/changeuser from drawterm
2008-03-20 9:28 [9fans] auth/changeuser from drawterm Christian Kellermann
2008-03-20 11:03 ` Christian Kellermann
@ 2008-03-20 13:20 ` erik quanstrom
1 sibling, 0 replies; 4+ messages in thread
From: erik quanstrom @ 2008-03-20 13:20 UTC (permalink / raw)
To: 9fans
> Dear 9fans,
>
> in order to be able to do administrative tasks through drawterm I
> habe added the following to my cpurc:
[...]
it's really worth setting up a serial console and console server to avoid
these issues. at home i use cec. there's a patch here
/n/sources/patch/saved
it's a little quirky, but if you don't have a spare serial port & null modem
it beats nothing.
- erik
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2008-03-20 9:28 [9fans] auth/changeuser from drawterm Christian Kellermann
2008-03-20 11:03 ` Christian Kellermann
2008-03-20 11:11 ` Christian Kellermann
2008-03-20 13:20 ` erik quanstrom
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