xterm: no available ptys

xterm: no available ptys

[Paul Powell]

Hello,

I have created a trimmed down /dev directory to be
used with my custom bootable Linux CD.  I've run into
a problem where I can't start an xterm.  I get the
error...

xterm:  no available ptys

I'm not sure which device I'm missing in /dev.  I'm no
expert on how the tty's and stuff work so feel free to
fill me in. Everything else seems to work fine on the
CD.

Here is what my /dev directory looks like now:

/dev:
console
cua0
cua1
cua2
cua3
fb
fb0
fb1
fb2
fb3
fb4
fb5
fb6
fb7
fd0
fd1
hda
hdb
hdc
hdd
kmem
listing
mem
mouse
null
psaux
pts
 |...0
ram
ram0
ram1
ram2
ram3
ramdisk
scd0
scd1
scd2
scd3
scd4
scd5
scd6
scd7
tty
tty0
tty1
tty2
ttyp0
ttyp1
ttyp2
ttyp3
ttyp4
urandom
zero

Am I missing something?

Any help appreciated!

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Re: xterm: no available ptys

[Ben Ford]

(ben@qwerty)-(12:52pm Mon Nov  6)-(/dev)
$ ls ptys*
ptys0  ptys2  ptys4  ptys6  ptys8  ptysa  ptysc  ptyse
ptys1  ptys3  ptys5  ptys7  ptys9  ptysb  ptysd  ptysf


-b

Paul Powell wrote:

> Hello,
>
> I have created a trimmed down /dev directory to be
> used with my custom bootable Linux CD.  I've run into
> a problem where I can't start an xterm.  I get the
> error...
>
> xterm:  no available ptys
>
> I'm not sure which device I'm missing in /dev.  I'm no
> expert on how the tty's and stuff work so feel free to
> fill me in. Everything else seems to work fine on the
> CD.
>
> Here is what my /dev directory looks like now:
>
> /dev:
> console
> cua0
> cua1
> cua2
> cua3
> fb
> fb0
> fb1
> fb2
> fb3
> fb4
> fb5
> fb6
> fb7
> fd0
> fd1
> hda
> hdb
> hdc
> hdd
> kmem
> listing
> mem
> mouse
> null
> psaux
> pts
>  |...0
> ram
> ram0
> ram1
> ram2
> ram3
> ramdisk
> scd0
> scd1
> scd2
> scd3
> scd4
> scd5
> scd6
> scd7
> tty
> tty0
> tty1
> tty2
> ttyp0
> ttyp1
> ttyp2
> ttyp3
> ttyp4
> urandom
> zero
>
> Am I missing something?
>
> Any help appreciated!
>
> __________________________________________________
> Do You Yahoo!?
> Thousands of Stores.  Millions of Products.  All in one Place.
> http://shopping.yahoo.com/
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> Please read the FAQ at http://www.tux.org/lkml/

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Re: xterm: no available ptys

[Michael Meissner]

On Mon, Nov 06, 2000 at 12:37:38PM -0800, Paul Powell wrote:
> Hello,
> 
> I have created a trimmed down /dev directory to be
> used with my custom bootable Linux CD.  I've run into
> a problem where I can't start an xterm.  I get the
> error...
> 
> xterm:  no available ptys
> 
> I'm not sure which device I'm missing in /dev.  I'm no
> expert on how the tty's and stuff work so feel free to
> fill me in. Everything else seems to work fine on the
> CD.

Did you mount /dev/pts, which is usually done with a line in /etc/fstab:

none /dev/pts devpts gid=5,mode=0622 0 0

-- 
Michael Meissner, Red Hat, Inc.
PMB 198, 174 Littleton Road #3, Westford, Massachusetts 01886, USA
Work:	  meissner@redhat.com		phone: +1 978-486-9304
Non-work: meissner@spectacle-pond.org	fax:   +1 978-692-4482
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Re: xterm: no available ptys

[H. Peter Anvin]

Followup to:  <20001106155755.A4096@munchkin.spectacle-pond.org>
By author:    Michael Meissner <meissner@spectacle-pond.org>
In newsgroup: linux.dev.kernel
> 
> Did you mount /dev/pts, which is usually done with a line in /etc/fstab:
> 
> none /dev/pts devpts gid=5,mode=0622 0 0
> 

That should be gid=5,mode=0620 unless you *REALLY*, *REALLY* know what
you're doing!!!!  Arguably, that should actually be mode=0600, with
user tty's then being required to chmod to 0620 if they want "mesg y"
by default.

(gid 5 being the gid for group "tty".)

	-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
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Re: xterm: no available ptys

[H. Peter Anvin]

Followup to:  <Pine.LNX.4.21.0011070157010.30406-100000@server.serve.me.nl>
By author:    Igmar Palsenberg <maillist@chello.nl>
In newsgroup: linux.dev.kernel
> 
> I'm missing ptmx. You NEED a writable /dev/pts dir.
> 

Actually, what you need is the devpts filesystem mounted onto
/dev/pts.

	-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
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Re: xterm: no available ptys

[Igmar Palsenberg]

On Mon, 6 Nov 2000, Paul Powell wrote:

> Hello,
> 
> I have created a trimmed down /dev directory to be
> used with my custom bootable Linux CD.  I've run into
> a problem where I can't start an xterm.  I get the
> error...
> 
> xterm:  no available ptys
> 
> I'm not sure which device I'm missing in /dev.  I'm no
> expert on how the tty's and stuff work so feel free to
> fill me in. Everything else seems to work fine on the
> CD.
> 
> Here is what my /dev directory looks like now:
> 
> /dev:
> console
> cua0
> cua1
> cua2
> cua3
> fb
> fb0
> fb1
> fb2
> fb3
> fb4
> fb5
> fb6
> fb7
> fd0
> fd1
> hda
> hdb
> hdc
> hdd
> kmem
> listing
> mem
> mouse
> null
> psaux
> pts
>  |...0

I'm missing ptmx. You NEED a writable /dev/pts dir.



	Igmar

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Re: xterm: no available ptys

[Igmar Palsenberg]

> > I'm missing ptmx. You NEED a writable /dev/pts dir.
> > 
> 
> Actually, what you need is the devpts filesystem mounted onto
> /dev/pts.

Agree. I had a shitload of probs when 2.2.0 came out and I switched.. Was
due that /dev was readonly here. Bit strange if I think of it. 

> 
> 	-hpa
> 


	Igmar

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Re: xterm: no available ptys

[H. Peter Anvin]

Igmar Palsenberg wrote:
> 
> > > I'm missing ptmx. You NEED a writable /dev/pts dir.
> > >
> >
> > Actually, what you need is the devpts filesystem mounted onto
> > /dev/pts.
> 
> Agree. I had a shitload of probs when 2.2.0 came out and I switched.. Was
> due that /dev was readonly here. Bit strange if I think of it.
> 

If you don't have devpts mounted, glibc tries to use a setuid program to
hack around /dev for you.  I'd rather wish it didn't, actually.

	-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
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