possible bug: OpenSSH appears to freeze on exit

[Mark Reardon]

Hi Markus,

Thanks for getting back.

I didn't think of attaching the script till after the mail.
The grep should run remotely.

I will change my test scripts to use the -n option and let you know...
:-( I just kicked it off went back to typing my mail - then checked the 
script before I hit send and it had already frozen...It was working for
about 5 minutes.

while $1
do 
RUN_STATUS=`ssh -v -v -v -n xcalibur "ps -ef | egrep
'(arc0|arch)'_xitprd00 | grep -v grep | wc -l"`
echo $RUN_STATUS
sleep 7
done


...previous 5 minutes it was working....

RUN_STATUS=       1
+ sleep 7 
+ ssh -v -v -v -n xcalibur ps -ef | egrep '(arc0|arch)'_xitprd00 | grep
-v grep | wc -l 
OpenSSH_2.9p2, SSH protocols 1.5/2.0, OpenSSL 0x0090601f
debug1: Reading configuration data //.ssh/config
debug1: Applying options for *
debug1: Reading configuration data /usr/local/etc/ssh_config
debug1: Applying options for *
debug1: Seeding random number generator
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: restore_uid
debug1: ssh_connect: getuid 0 geteuid 0 anon 1
debug1: Connecting to xcalibur [13.219.48.22] port 22.
debug1: temporarily_use_uid: 0/1 (e=0)
debug1: restore_uid
debug1: temporarily_use_uid: 0/1 (e=0)
debug1: restore_uid
debug1: Connection established.
debug1: identity file //.ssh/identity type 0
debug3: No RSA1 key file //.ssh/id_dsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: no key found
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: no key found
debug1: identity file //.ssh/id_dsa type 2
debug1: identity file //.ssh/id_rsa1 type -1
debug1: identity file //.ssh/id_rsa2 type -1
debug1: Remote protocol version 1.99, remote software version
OpenSSH_2.9p2
debug1: match: OpenSSH_2.9p2 pat ^OpenSSH
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_2.9p2
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,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: zlib
debug2: kex_parse_kexinit: 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-dss,ssh-rsa
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at 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 zlib
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 zlib
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: dh_gen_key: priv key bits set: 134/256
debug1: bits set: 1038/2049
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename //.ssh/known_hosts2
debug3: check_host_in_hostfile: match line 195
debug3: check_host_in_hostfile: filename //.ssh/known_hosts2
debug3: key_read: type mismatch
debug3: check_host_in_hostfile: match line 195
debug1: Host 'xcalibur' is known and matches the RSA host key.
debug1: Found key in //.ssh/known_hosts2:195
debug1: bits set: 1031/2049
debug1: ssh_rsa_verify: signature correct
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: Enabling compression at level 6.
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: done: ssh_kex2.
debug1: send SSH2_MSG_SERVICE_REQUEST
debug1: service_accept: ssh-userauth
debug1: got SSH2_MSG_SERVICE_ACCEPT
debug1: authentications that can continue:
publickey,password,keyboard-interactive
debug3: start over, passed a different list
publickey,password,keyboard-interactive
debug3: preferred publickey,password,keyboard-interactive
debug3: authmethod_lookup publickey
debug3: remaining preferred: password,keyboard-interactive
debug3: authmethod_is_enabled publickey
debug1: next auth method to try is publickey
debug1: try pubkey: //.ssh/id_dsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: input_userauth_pk_ok: pkalg ssh-dss blen 434 lastkey 10ae98 hint
1
debug2: input_userauth_pk_ok: fp
b2:48:f6:61:cd:b8:d0:b5:58:85:95:be:7e:20:68:a8
debug3: sign_and_send_pubkey
debug1: read PEM private key done: type DSA
debug1: sig size 20 20
debug1: ssh-userauth2 successful: method publickey
debug1: fd 5 setting O_NONBLOCK
debug1: fd 6 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug1: channel_new: 0
debug1: send channel open 0
debug1: Entering interactive session.
debug2: callback start
debug1: client_init id 0 arg 0
debug1: Sending command: ps -ef | egrep '(arc0|arch)'_xitprd00 | grep -v
grep | wc -l
debug2: callback done
debug1: channel 0: open confirm rwindow 0 rmax 16384
debug2: channel 0: rcvd adjust 32768
debug1: channel 0: rcvd eof
debug1: channel 0: output open -> drain
debug1: channel 0: obuf empty
debug1: channel 0: output drain -> closed
debug1: channel 0: close_write

...freeze happens here 


Markus Friedl wrote:
> 
> On Thu, Jul 26, 2001 at 09:44:32AM +0100, Mark Reardon wrote:
> > ssh -v -v -v xcalibur ps -ef | egrep '(arc0|arch)'_xitprd00 | grep -v grep | wc -l
> 
> should 'grep' run local or remote
> 
> does '-n' help for ssh? e.g.
>         ssh -n host ps |grep bla
> 
> -m