URGENT HELP NEEDED

From: Igor B (igor_bumshteyn_at_yahoo.com)
Date: 09/29/03 

Date: 29 Sep 2003 10:09:39 -0700

still unresolved and help needed desperately
i'm trying to run a remote X app via ssh by assigning a function
key(i.e. the session is not interactive).
the command is the following:
/path/to/ssh -t user@server "/path/to/remote_app" > /tmp/file 2>&1

i've established passwordless public key authentication between the
client and the server. when i run the command from the prompt (i.e.
actual tty) it works perfectly however when i press the assigned key i
get the following in the /tmp/file:
pseudo-terminal will not be allocated because stdin is not a terminal
select: Invalid argument
 
with multiple -t i get "tcgetattr: No such device" error message
 
the client is openssh3.6.1p2 on sco 5.0.5 and the
server is openssh3.4.1 on redhat
i've also tried sco 5.0.7 w/ openssh3.5.1 as a server and still get
same error message.
the log files and the debug shows that it is the client who closes the
connection. i looked at the possibility that the client is unable to
retrieve term settings. i went through the source code and found a
bunch of calls to tcgetattr. i then inserted a few debug statements
right next to tcgetattr to see which condition causes it to fail but
looking at the debug statements it looks more like the problem is with
select(see above error messages).
below are the debug statements(edited where appropriate for security
reasons) from /tmp/file including the ones that i've added:

OpenSSH_3.6.1p2, SSH protocols 1.5/2.0, OpenSSL 0x0090700f
debug1: Reading configuration data /usr/local/openssh/etc/ssh_config
debug3: Seeding PRNG from /usr/local/openssh/libexec/ssh-rand-helper
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug2: ssh_connect: needpriv 0
debug1: Connecting to server [ip address] port 22.
debug1: Connection established.
debug3: Not a RSA1 key file /usr/igorb/.ssh/ssh_host_key.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: missing keytype
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /usr/igorb/.ssh/ssh_host_key type 2
debug1: Remote protocol version 2.0, remote software version
OpenSSH_3.4p1
debug1: match: OpenSSH_3.4p1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.6.1p2
debug3: RNG is ready, skipping seeding
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 133/256
debug2: bits set: 1571/3191
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /usr/igorb/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 16
debug3: check_host_in_hostfile: filename /usr/igorb/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 16
debug1: Host 'server' is known and matches the RSA host key.
debug1: Found key in /usr/igorb/.ssh/known_hosts:16
debug2: bits set: 1596/3191
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue:
publickey,password,keyboard-interactive
debug3: start over, passed a different list
publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /usr/igorb/.ssh/ssh_host_key
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-dss blen 435 lastkey 810b3c4
hint 0
debug2: input_userauth_pk_ok: fp
f5:83:42:7f:e0:72:16:66:77:76:a9:d4:f2:51:0c:12
debug3: sign_and_send_pubkey
debug1: read PEM private key done: type DSA
debug1: Authentication succeeded (publickey).
debug1: fd 5 setting O_NONBLOCK
debug1: fd 6 setting O_NONBLOCK
debug2: fd 7 is O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Entering interactive session.
tcgetattr: No such device
debug3: sshtty.c file <------ this one is inserted by me
debug2: callback start
debug2: ssh_session2_setup: id 0
debug1: channel 0: request pty-req
debug3: tty_make_modes: ospeed 0
debug3: tty_make_modes: ispeed 0
debug3: tty_make_modes: 1 0
debug3: tty_make_modes: 2 0
debug3: tty_make_modes: 3 0
debug3: tty_make_modes: 4 0
debug3: tty_make_modes: 5 0
debug3: tty_make_modes: 6 0
debug3: tty_make_modes: 7 0
debug3: tty_make_modes: 8 0
debug3: tty_make_modes: 9 0
debug3: tty_make_modes: 10 0
debug3: tty_make_modes: 16 0
debug3: tty_make_modes: 30 0
debug3: tty_make_modes: 31 0
debug3: tty_make_modes: 32 0
debug3: tty_make_modes: 33 0
debug3: tty_make_modes: 34 0
debug3: tty_make_modes: 35 0
debug3: tty_make_modes: 36 0
debug3: tty_make_modes: 37 0
debug3: tty_make_modes: 38 0
debug3: tty_make_modes: 39 0
debug3: tty_make_modes: 40 0
debug3: tty_make_modes: 50 0
debug3: tty_make_modes: 51 0
debug3: tty_make_modes: 52 0
debug3: tty_make_modes: 53 0
debug3: tty_make_modes: 54 0
debug3: tty_make_modes: 55 0
debug3: tty_make_modes: 56 0
debug3: tty_make_modes: 57 0
debug3: tty_make_modes: 58 0
debug3: tty_make_modes: 59 0
debug3: tty_make_modes: 70 0
debug3: tty_make_modes: 71 0
debug3: tty_make_modes: 72 0
debug3: tty_make_modes: 73 0
debug3: tty_make_modes: 74 0
debug3: tty_make_modes: 75 0
debug3: tty_make_modes: 90 0
debug3: tty_make_modes: 91 0
debug3: tty_make_modes: 92 0
debug3: tty_make_modes: 93 0
debug2: x11_get_proto: /usr/bin/X11/xauth list igorb:0.0 2>/dev/null
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: channel 0: request x11-req
debug1: Sending command: /usr/X11R6/bin/xclock
debug1: channel 0: request exec
debug2: callback done
debug1: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 131072
debug1: channel_free: channel 0: client-session, nchannels 1
debug3: channel_free: status: The following connections are open:\015
  #0 client-session (t4 r0 i0/0 o0/0 fd 5/6)\015

debug3: channel_close_fds: channel 0: r 5 w 6 e 7
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
debug2: fd 2 is not O_NONBLOCK
select: Invalid argument
Connection to server closed.
debug1: Transferred: stdin 0, stdout 0, stderr 56 bytes in 0.1 seconds
debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 622.2
debug1: Exit status -1

i'd really appreciate any help or suggestions on the matter.
thanks

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