getty problems

getty problems

[Lech Szychowski]

In short: on 2.4.7-ac[3-7] getty cannot open /dev/ttyX,
while on 2.4.5 it can.

I've done "strace -o /tmp/GETTY-`uname -r` /sbin/getty tty9 vc linux"
in both cases and compared otput files. The big difference is here:

2.4.5:
open("/dev/tty9", O_RDWR|O_NONBLOCK)    = 0

2.4.7-ac7:
open("/dev/tty9", O_RDWR|O_NONBLOCK)    = -1 ENODEV (No such device)

And yes, I believe I have terminal support compiled in:

===
#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_SERIAL_CONSOLE=y
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
===

$ gcc -v      
Reading specs from /usr/lib/gcc-lib/i386-slackware-linux/2.95.3/specs
gcc version 2.95.3 20010315 (release)

This problem hit me when I compiled and installed new kernel
(2.4.5 comes with the distribution) - I could not log in because
all gettys got disabled:

Aug  6 14:10:09 nnet /sbin/agetty[103]: /dev/tty6: cannot open as standard input: No such device
Aug  6 14:10:09 nnet init: Id "c4" respawning too fast: disabled for 5 minutes

-- 
	Leszek.

-- lech7@pse.pl 2:480/33.7          -- REAL programmers use INTEGERS --
-- speaking just for myself...

Re: getty problems

[Chris Wedgwood]

On Mon, Aug 06, 2001 at 02:27:04PM +0200, Lech Szychowski wrote:

    2.4.7-ac7:
    open("/dev/tty9", O_RDWR|O_NONBLOCK)    = -1 ENODEV (No such device)
    
    And yes, I believe I have terminal support compiled in:

/prox/devices says?



  --cw

Re: getty problems

[Lech Szychowski]

>     open("/dev/tty9", O_RDWR|O_NONBLOCK)    = -1 ENODEV (No such device)
>     
>     And yes, I believe I have terminal support compiled in:
> 
> /prox/devices says?

2.4.5:
------

 Character devices:
   1 mem
   2 pty/m%d
   3 pty/s%d
   4 tts/%d
   5 cua/%d
   6 lp
   7 vcs
  10 misc
  21 sg
  29 fb
 108 ppp
 109 lvm
 128 ptm
 129 ptm
 136 pts/%d
 137 pts/%d
 162 raw

 /proc/tty/drivers

 serial               /dev/cua/%d     5  64-127 serial:callout
 serial               /dev/tts/%d     4  64-127 serial
 pty_slave            /dev/pts/%d   137   0-255 pty:slave
 pty_master           /dev/ptm      129   0-255 pty:master
 pty_slave            /dev/pts/%d   136   0-255 pty:slave
 pty_master           /dev/ptm      128   0-255 pty:master
 pty_slave            /dev/pty/s%d    3   0-255 pty:slave
 pty_master           /dev/pty/m%d    2   0-255 pty:master
 /dev/vc/0            /dev/vc/0       4       0 system:vtmaster
 /dev/ptmx            /dev/ptmx       5       2 system
 /dev/console         /dev/console    5       1 system:console
 /dev/tty             /dev/tty        5       0 system:/dev/tty
 unknown              /dev/vc/%d      4    1-63 console

2.4.7-ac7:
----------

 /proc/devices

 Character devices:
   1 mem
   2 pty
   3 ttyp
   4 ttyS
   5 cua
   7 vcs
  10 misc
 128 ptm
 136 pts
 162 raw

 /proc/tty/drivers

 serial               /dev/cua        5  64-127 serial:callout
 serial               /dev/ttyS       4  64-127 serial
 pty_slave            /dev/pts      136   0-255 pty:slave
 pty_master           /dev/ptm      128   0-255 pty:master
 pty_slave            /dev/ttyp       3   0-255 pty:slave
 pty_master           /dev/pty        2   0-255 pty:master
 /dev/vc/0            /dev/vc/0       4       0 system:vtmaster
 /dev/ptmx            /dev/ptmx       5       2 system
 /dev/console         /dev/console    5       1 system:console
 /dev/tty             /dev/tty        5       0 system:/dev/tty


-- 
	Leszek.

-- lech7@pse.pl 2:480/33.7          -- REAL programmers use INTEGERS --
-- speaking just for myself...

Re: getty problems

[Chris Wedgwood]

On Mon, Aug 06, 2001 at 03:45:30PM +0200, Lech Szychowski wrote:

    2.4.7-ac7:
    ----------
    
     /proc/devices
    
     Character devices:
       1 mem
       2 pty
       3 ttyp
       4 ttyS
       5 cua
       7 vcs
      10 misc
     128 ptm
     136 pts
     162 raw

Are you use this kernel isn't devfs inflicted?




  --cw

Re: getty problems

[Lech Szychowski]

>     2.4.7-ac7:
>     ----------
[snip]
> 
> Are you use this kernel isn't devfs inflicted?

2.4.7-ac7 is compiled without devfs, 2.4.5 has devfs support
compiled in but - IMHO - not used:

$ cat /proc/filesystems | grep devfs
nodev   devfs

$ /sbin/lsmod 
Module                  Size  Used by
de4x5                  39440   2

lech7@nnet:~$ mount
/dev/sda6 on / type ext2 (rw)
/dev/sda7 on /var type ext2 (rw)
/dev/sda8 on /tmp type ext2 (rw)
/dev/sda9 on /usr/local/squid type ext2 (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
none on /proc type proc (rw)

$ uname -r
2.4.5

-- 
	Leszek.

-- lech7@pse.pl 2:480/33.7          -- REAL programmers use INTEGERS --
-- speaking just for myself...

Re: getty problems

[H. Peter Anvin]

Followup to:  <20010806182414.A29605@lech.pse.pl>
By author:    Lech Szychowski <lech.szychowski@pse.pl>
In newsgroup: linux.dev.kernel
>
> >     2.4.7-ac7:
> >     ----------
> [snip]
> > 
> > Are you use this kernel isn't devfs inflicted?
> 
> 2.4.7-ac7 is compiled without devfs, 2.4.5 has devfs support
> compiled in but - IMHO - not used:
> 

Yes, this is a known pathology of devfs.  It will do this to you even
if it isn't used.

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>

Re: getty problems

[Richard Gooch]

H. Peter Anvin writes:
> Followup to:  <20010806182414.A29605@lech.pse.pl>
> By author:    Lech Szychowski <lech.szychowski@pse.pl>
> In newsgroup: linux.dev.kernel
> >
> > >     2.4.7-ac7:
> > >     ----------
> > [snip]
> > > 
> > > Are you use this kernel isn't devfs inflicted?
> > 
> > 2.4.7-ac7 is compiled without devfs, 2.4.5 has devfs support
> > compiled in but - IMHO - not used:
> 
> Yes, this is a known pathology of devfs.  It will do this to you even
> if it isn't used.

Would someone care to forward me the unsnipped bug report? I didn't
see the original message.

				Regards,

					Richard....
Permanent: rgooch@atnf.csiro.au
Current:   rgooch@ras.ucalgary.ca