chrooted ssh user and /dev/tty permission denied

Peter Vereshagin peter at
Fri Jan 21 11:56:54 UTC 2011

You'll never silence the voice of the voiceless, Ibrahim!
2011/01/20 11:06:30 +0200 Ibrahim Harrani <ibrahim.harrani at> => To freebsd-questions at :
IH> "cannot open /dev/tty: permission denied"  message.

This sounds as a problem of standard handles permissions to me. I'm not
expereinced in C library to qualify it more exactly.
I use such a hack against this, depending on the situattion:
1. -t parameter for your ssh client 
2. /usr/bin/script -qt0 /dev/null before your ssh command

or sometimes both of them.
Sometimes some of those hack leads to higher CPU consumption, so I omit the one.

IH> crw--w----  1 root  tty    0,  88 Jan 20 11:02 /dev/tty
IH> I tired to change permission as root from out of the chroot by chmod,
IH> the permission never change.

Since some version of freebsd the devices are kept in devfs and chmod may not
work ( although it did recently for me for some of a directory in /dev, or a
symlink, I just don't remember).
You should define a 'mode' rule in some of your /etc/devfs.* configs,
depending on your particular need.

73! Peter pgp: A0E26627 (4A42 6841 2871 5EA7 52AB  12F8 0CE1 4AAC A0E2 6627)

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