I'm a bit at my wits end with this one. I'm seeing a problem where an automated script fails if it doesn't have a tty. Stripping it right back, the issue is that (open)ssh to a Windows build box VM succeeds if openssh has a controlling pty, and fails if it doesn't. IE: ssh -T host command succeeds ssh -tt host command succeeds nohup ssh -T host command fails nohup ssh -tt host command fails I'm running under 'env -i' to clear the environment off. I have verified the MS end is not actually running the command (as opposed to merely the output not showing) - for one it's 100 times quicker without nohup. I'm running: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2, OpenSSL 1.0.1f 6 Jan 2014 -- Alex Bligh $ rm -f nohup.out; env -i nohup ssh -vvv -T -oGSSAPIAuthentication=no -oUserKnownHostsFile=unixbuild/known_hosts -oNumberOfPasswordPrompts=0 -oPasswordAuthentication=no -oStrictHostKeyChecking=no -i build/protkey -p 10037 Administrator@127.0.0.1 'powershell /c echo hello' ; cat nohup.out nohup: ignoring input and appending output to 'nohup.out' OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to 127.0.0.1 [127.0.0.1] port 10037. debug1: Connection established. debug3: Incorrect RSA1 identifier debug3: Could not load "build/protkey" as a RSA1 public key debug1: identity file build/protkey type 1 debug1: identity file build/protkey-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 debug1: Remote protocol version 2.0, remote software version WeOnlyDo 2.4.3 debug1: no match: WeOnlyDo 2.4.3 debug2: fd 3 setting O_NONBLOCK debug3: put_host_port: [127.0.0.1]:10037 debug3: load_hostkeys: loading entries for host "[127.0.0.1]:10037" from file "unixbuild/known_hosts" debug3: load_hostkeys: found key type RSA in file unixbuild/known_hosts:12 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v00@xxxxxxxxxxx,ssh-rsa debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: curve25519-sha256@xxxxxxxxxx,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v00@xxxxxxxxxxx,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp384-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp521-cert-v01@xxxxxxxxxxx,ssh-ed25519-cert-v01@xxxxxxxxxxx,ssh-dss-cert-v01@xxxxxxxxxxx,ssh-dss-cert-v00@xxxxxxxxxxx,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,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: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,aes128-ctr,3des-cbc,blowfish-cbc,aes192-cbc,aes192-ctr,aes256-cbc,aes256-ctr,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,cast128-cbc debug2: kex_parse_kexinit: aes128-cbc,aes128-ctr,3des-cbc,blowfish-cbc,aes192-cbc,aes192-ctr,aes256-cbc,aes256-ctr,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,cast128-cbc debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-sha1-96,hmac-md5,none debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-sha1-96,hmac-md5,none debug2: kex_parse_kexinit: none,none debug2: kex_parse_kexinit: none,none debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: setup hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: setup hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: RSA f3:0e:1c:c8:14:c9:11:b1:f4:6a:a3:4b:8d:66:0b:f7 debug3: put_host_port: [127.0.0.1]:10037 debug3: put_host_port: [127.0.0.1]:10037 debug3: load_hostkeys: loading entries for host "[127.0.0.1]:10037" from file "unixbuild/known_hosts" debug3: load_hostkeys: found key type RSA in file unixbuild/known_hosts:12 debug3: load_hostkeys: loaded 1 keys debug1: Host '[127.0.0.1]:10037' is known and matches the RSA host key. debug1: Found key in unixbuild/known_hosts:12 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: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: build/protkey (0x7ff216a52da0), explicit debug1: Authentications that can continue: password,gssapi-with-mic,publickey debug3: start over, passed a different list password,gssapi-with-mic,publickey debug3: preferred publickey,keyboard-interactive debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: build/protkey debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ssh-rsa blen 535 debug2: input_userauth_pk_ok: fp 94:64:fc:54:e6:91:82:ee:c4:4e:ae:bd:cd:15:36:fa debug3: sign_and_send_pubkey: RSA 94:64:fc:54:e6:91:82:ee:c4:4e:ae:bd:cd:15:36:fa debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA debug1: Authentication succeeded (publickey). Authenticated to 127.0.0.1 ([127.0.0.1]:10037). debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug3: fd 6 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. debug2: callback start debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x08 debug2: client_session2_setup: id 0 debug1: Sending environment. debug1: Sending command: powershell /c echo hello debug2: channel 0: request exec confirm 1 debug2: callback done debug2: channel 0: open confirm rwindow 131072 rmax 98304 debug2: channel 0: read<=0 rfd 4 len -1 debug2: channel 0: read failed debug2: channel 0: close_read debug2: channel 0: input open -> drain debug2: channel 0: ibuf empty debug2: channel 0: send eof debug2: channel 0: input drain -> closed debug2: channel_input_status_confirm: type 99 id 0 debug2: exec request accepted on channel 0 debug2: channel 0: rcvd adjust 0 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug2: channel 0: rcvd close debug2: channel 0: output open -> drain debug3: channel 0: will not send data after close debug2: channel 0: obuf empty debug2: channel 0: close_write debug2: channel 0: output drain -> closed debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i3/0 o3/0 fd -1/-1 cc -1) debug1: fd 0 clearing O_NONBLOCK debug1: fd 1 clearing O_NONBLOCK debug3: fd 2 is not O_NONBLOCK Transferred: sent 4128, received 1912 bytes, in 0.0 seconds Bytes per second: sent 406787.3, received 188415.0 debug1: Exit status 0 $ env -i ssh -vvv -T -oGSSAPIAuthentication=no -oUserKnownHostsFile=unixbuild/known_hosts -oNumberOfPasswordPrompts=0 -oPasswordAuthentication=no -oStrictHostKeyChecking=no -i build/protkey -p 10037 Administrator@127.0.0.1 'powershell echo hello' OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to 127.0.0.1 [127.0.0.1] port 10037. debug1: Connection established. debug3: Incorrect RSA1 identifier debug3: Could not load "build/protkey" as a RSA1 public key debug1: identity file build/protkey type 1 debug1: identity file build/protkey-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 debug1: Remote protocol version 2.0, remote software version WeOnlyDo 2.4.3 debug1: no match: WeOnlyDo 2.4.3 debug2: fd 3 setting O_NONBLOCK debug3: put_host_port: [127.0.0.1]:10037 debug3: load_hostkeys: loading entries for host "[127.0.0.1]:10037" from file "unixbuild/known_hosts" debug3: load_hostkeys: found key type RSA in file unixbuild/known_hosts:12 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v00@xxxxxxxxxxx,ssh-rsa debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: curve25519-sha256@xxxxxxxxxx,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v00@xxxxxxxxxxx,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp384-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp521-cert-v01@xxxxxxxxxxx,ssh-ed25519-cert-v01@xxxxxxxxxxx,ssh-dss-cert-v01@xxxxxxxxxxx,ssh-dss-cert-v00@xxxxxxxxxxx,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,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: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,aes128-ctr,3des-cbc,blowfish-cbc,aes192-cbc,aes192-ctr,aes256-cbc,aes256-ctr,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,cast128-cbc debug2: kex_parse_kexinit: aes128-cbc,aes128-ctr,3des-cbc,blowfish-cbc,aes192-cbc,aes192-ctr,aes256-cbc,aes256-ctr,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,cast128-cbc debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-sha1-96,hmac-md5,none debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-sha1-96,hmac-md5,none debug2: kex_parse_kexinit: none,none debug2: kex_parse_kexinit: none,none debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: setup hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: setup hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: RSA f3:0e:1c:c8:14:c9:11:b1:f4:6a:a3:4b:8d:66:0b:f7 debug3: put_host_port: [127.0.0.1]:10037 debug3: put_host_port: [127.0.0.1]:10037 debug3: load_hostkeys: loading entries for host "[127.0.0.1]:10037" from file "unixbuild/known_hosts" debug3: load_hostkeys: found key type RSA in file unixbuild/known_hosts:12 debug3: load_hostkeys: loaded 1 keys debug1: Host '[127.0.0.1]:10037' is known and matches the RSA host key. debug1: Found key in unixbuild/known_hosts:12 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: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: build/protkey (0x7f0ac907ed90), explicit debug1: Authentications that can continue: password,gssapi-with-mic,publickey debug3: start over, passed a different list password,gssapi-with-mic,publickey debug3: preferred publickey,keyboard-interactive debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: build/protkey debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ssh-rsa blen 535 debug2: input_userauth_pk_ok: fp 94:64:fc:54:e6:91:82:ee:c4:4e:ae:bd:cd:15:36:fa debug3: sign_and_send_pubkey: RSA 94:64:fc:54:e6:91:82:ee:c4:4e:ae:bd:cd:15:36:fa debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA debug1: Authentication succeeded (publickey). Authenticated to 127.0.0.1 ([127.0.0.1]:10037). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Entering interactive session. debug2: callback start debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x08 debug2: client_session2_setup: id 0 debug1: Sending environment. debug1: Sending command: powershell echo hello debug2: channel 0: request exec confirm 1 debug2: callback done debug2: channel 0: open confirm rwindow 131072 rmax 98304 debug2: channel_input_status_confirm: type 99 id 0 debug2: exec request accepted on channel 0 debug2: channel 0: rcvd adjust 0 hello <-------------------------------------------------- OUTPUT HERE debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug2: channel 0: rcvd close debug2: channel 0: output open -> drain debug2: channel 0: close_read debug2: channel 0: input open -> closed debug3: channel 0: will not send data after close debug2: channel 0: obuf empty debug2: channel 0: close_write debug2: channel 0: output drain -> closed debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i3/0 o3/0 fd -1/-1 cc -1) Transferred: sent 4096, received 1944 bytes, in 0.9 seconds Bytes per second: sent 4658.3, received 2210.9 debug1: Exit status 0 _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
