Re^4: How to solve Pseudo terminal issue OpenSSH

What do you get when you pass the command as stdin_data?

Pseudo-terminal will not be allocated because stdin is not a terminal.

BTW, enable debugging for both Net::OpenSSH and the underlaying ssh.

Script logs into device. But couldn't execute stdin_data code...It enters to interactive mode. Except also didn't come to rescue

#including code for debugging
$Net::OpenSSH::debug = ~0;
[download]

Here is the output

[root@server-01 perl_script]# perl perl_script4.pl 
# open_ex: ['ssh','-V']
# io3 mloop, cin: 0, cout: 1, cerr: 0
# io3 fast, cin: 0, cout: 1, cerr: 0
# stdout, bytes read: 46 at offset 0
#> 4f 70 65 6e 53 53 48 5f 35 2e 33 70 31 2c 20 4f 70 65 6e 53 53 4c 2
+0 31 2e 30 2e 30 2d 66 69 70 | OpenSSH_5.3p1, OpenSSL 1.0.0-fip
#> 73 20 32 39 20 4d 61 72 20 32 30 31 30 0a                          
+                             | s 29 Mar 2010.
# io3 fast, cin: 0, cout: 1, cerr: 0
# stdout, bytes read: 0 at offset 46
# leaving _io3()
# waiting for slave, timeout: 10, remaining: 10, sleep: 1
# _waitpid(31782) => pid: 31782, rc: 0, err: Interrupted system call
# OpenSSH verion is 5.3p1,
# ctl_path: /root/.libnet-openssh-perl/username-10.10.10.10-31781-5917
+21, ctl_dir: /root/.libnet-openssh-perl/
# _is_secure_path(dir: /root/.libnet-openssh-perl, file mode: 16832, f
+ile uid: 0, euid: 0
# _is_secure_path(dir: /root, file mode: 16744, file uid: 0, euid: 0
# set_error(0 - 0)
# call args: ['ssh','-vvvv','-o','ServerAliveInterval=30','-2MNx','-o'
+,'NumberOfPasswordPrompts=1','-o','PreferusernameAuthentications=keyb
+oard-interactive,password','-S','/root/.libnet-openssh-perl/username-
+10.10.10.10-31781-591721','-l','username','10.10.10.10','--']
# master state jumping from _STATE_START to _STATE_LOGIN
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# tracer attached, ssh pid: 31783, tracer pid: 31784
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 10.10.10.10 [10.10.10.10] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5
+.1
debug1: match: OpenSSH_5.1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug3: Wrote 792 bytes for a total of 813
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie
+-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellm
+an-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256
+,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,a
+es256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256
+,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,a
+es256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac
+-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac
+-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,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-sha256,diffie
+-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellm
+an-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cb
+c,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@ly
+sator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cb
+c,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@ly
+sator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac
+-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac
+-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
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: found hmac-md5
debug1: kex: server->client aes128-ctr hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug3: Wrote 24 bytes for a total of 837
debug2: dh_gen_key: priv key bits set: 128/256
debug2: bits set: 1008/2048
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: Wrote 272 bytes for a total of 1109
debug3: check_host_in_hostfile: filename /root/.ssh/known_hosts2
debug3: check_host_in_hostfile: match line 1
debug1: Host '10.10.10.10' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts2:1
debug2: bits set: 999/2048
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
debug3: Wrote 16 bytes for a total of 1125
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug3: Wrote 48 bytes for a total of 1173
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /root/.ssh/id_rsa ((nil))
debug2: key: /root/.ssh/id_dsa ((nil))
debug3: Wrote 64 bytes for a total of 1237
debug3: input_userauth_banner

                        +=============================================
+==+
                        |                          |
                        +=============================================
+==+


debug1: Authentications that can continue: publickey,password,keyboard
+-interactive
debug3: start over, passed a different list publickey,password,keyboar
+d-interactive
debug3: preferusername keyboard-interactive,password
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferusername: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug3: Wrote 96 bytes for a total of 1333
debug1: Authentications that can continue: publickey,password,keyboard
+-interactive
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferusername: 
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_LOGIN
# passwd/passphrase requested (username@10.10.10.10's password:)
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_AWAITING_MUX
debug3: packet_send2: adding 64 (len 56 padlen 8 extra_pad 64)
debug2: we sent a password packet, wait for reply
debug3: Wrote 144 bytes for a total of 1477
# file object not yet found at /root/.libnet-openssh-perl/username-10.
+10.10.10-31781-591721, state:_STATE_AWAITING_MUX
debug1: Authentication succeeded (password).
debug1: setting up multiplex master socket
debug2: fd 4 setting O_NONBLOCK
debug1: Entering interactive session.
# file object found at /root/.libnet-openssh-perl/username-10.10.10.10
+-31781-591721
# master state jumping from _STATE_AWAITING_MUX to _STATE_RUNNING
# call args: ['ssh','-O','check','-T','-S','/root/.libnet-openssh-perl
+/username-10.10.10.10-31781-591721','-l','username','10.10.10.10','--
+']
# open_ex: ['ssh','-O','check','-T','-S','/root/.libnet-openssh-perl/u
+sername-10.10.10.10-31781-591721','-l','username','10.10.10.10','--']
# io3 mloop, cin: 0, cout: 1, cerr: 0
# io3 fast, cin: 0, cout: 1, cerr: 0
debug3: fd 5 is not O_NONBLOCK
debug3: ssh_msg_recv entering
debug3: ssh_msg_send: type 2
# stdout, bytes read: 28 at offset 0
#> 4d 61 73 74 65 72 20 72 75 6e 6e 69 6e 67 20 28 70 69 64 3d 33 31 3
+7 38 33 29 0d 0a             | Master running (pid=31783)..
# io3 fast, cin: 0, cout: 1, cerr: 0
# stdout, bytes read: 0 at offset 28
# leaving _io3()
# _waitpid(31787) => pid: 31787, rc: 0, err: 
# call args: ['ssh','-S','/root/.libnet-openssh-perl/username-10.10.10
+.10-31781-591721','-l','username','10.10.10.10','--']
# open_ex: ['ssh','-S','/root/.libnet-openssh-perl/username-10.10.10.1
+0-31781-591721','-l','username','10.10.10.10','--']
# io3 mloop, cin: 1, cout: 1, cerr: 0
# io3 fast, cin: 1, cout: 1, cerr: 0
# stdin, bytes written: 16
#> 73 68 6f 77 20 63 6c 6f 63 6b 0a 65 78 69 74 0a                    
+                             | show clock.exit.
# io3 mloop, cin: 0, cout: 1, cerr: 0
# io3 fast, cin: 0, cout: 1, cerr: 0
Pseudo-terminal will not be allocated because stdin is not a terminal.
debug3: fd 5 is not O_NONBLOCK
debug3: ssh_msg_recv entering
debug3: ssh_msg_send: type 2
debug3: ssh_msg_recv entering
debug3: muxserver_accept_control: receiving 1 env vars
debug2: muxserver_accept_control: accepted tty 0, subsys 0, cmd 
debug2: muxserver_accept_control: got fds stdin 6, stdout 7, stderr 8
debug3: ssh_msg_send: type 2
debug2: fd 6 setting O_NONBLOCK
debug2: fd 7 setting O_NONBLOCK
debug2: fd 5 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: muxserver_accept_control: channel_new: 0
debug2: channel 0: send open
debug3: Wrote 64 bytes for a total of 1541
debug2: callback start
debug2: client_session2_setup: id 0
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: Wrote 112 bytes for a total of 1653
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
debug2: channel 0: read<=0 rfd 6 len 0
debug2: channel 0: read failed
debug2: channel 0: close_read
debug2: channel 0: input open -> drain
debug3: Wrote 64 bytes for a total of 1717
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug2: channel 0: input drain -> closed
debug3: Wrote 32 bytes for a total of 1749
# stdout, bytes read: 10 at offset 0
#> 1b 5b 32 4a 1b 5b 31 3b 31 48                                      
+                             | .[2J.[1;1H
# io3 fast, cin: 0, cout: 1, cerr: 0
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
debug2: channel 0: send close
debug3: Wrote 32 bytes for a total of 1781
debug1: client_input_channel_req: channel 0 rtype exit-signal reply 0
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after 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 cfd 5)

# stdout, bytes read: 0 at offset 10
# leaving _io3()
debug3: channel 0: close_fds r -1 w -1 e 8 c 5
# _waitpid(31788) => pid: 31788, rc: 65280, err: 
# set_error(5 - child exited with code 255)
Couldn't run remote command: child exited with code 255 at perl_script
+4.pl line 42.
# DESTROY(Net::OpenSSH=HASH(0x133ae68), pid: 31783)
# sending exit control to master
# call args: ['ssh','-O','exit','-T','-S','/root/.libnet-openssh-perl/
+username-10.10.10.10-31781-591721','-l','username','10.10.10.10','--'
+]
# open_ex: ['ssh','-O','exit','-T','-S','/root/.libnet-openssh-perl/us
+ername-10.10.10.10-31781-591721','-l','username','10.10.10.10','--']
# io3 mloop, cin: 0, cout: 1, cerr: 0
# io3 fast, cin: 0, cout: 1, cerr: 0
debug3: fd 5 is not O_NONBLOCK
debug3: ssh_msg_recv entering
debug3: ssh_msg_send: type 2
debug3: Wrote 64 bytes for a total of 1845
Transferusername: sent 1648, received 3088 bytes, in 0.2 seconds
Bytes per second: sent 6973.7, received 13067.1
debug1: Exit status -1
# stdout, bytes read: 20 at offset 0
#> 45 78 69 74 20 72 65 71 75 65 73 74 20 73 65 6e 74 2e 0d 0a        
+                             | Exit request sent...
# io3 fast, cin: 0, cout: 1, cerr: 0
# stdout, bytes read: 0 at offset 20
# leaving _io3()
# _waitpid(31789) => pid: 31789, rc: 0, err: 
# set_error(1 - aborted)
# master state jumping from _STATE_RUNNING to _STATE_KILLING
# master 31783 exited, rc:65280, err: 
# master state jumping from _STATE_KILLING to _STATE_GONE
[root@server-01 perl_script]#
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Comment on Re^4: How to solve Pseudo terminal issue OpenSSH Select or Download Code

Replies are listed 'Best First'.
Re^5: How to solve Pseudo terminal issue OpenSSH by salva (Canon) on May 14, 2015 at 09:00 UTC
The remote shell is not recognizing the command sent and dying with some signal (probably `SIGHUP` or `SIGPIPE`). Try using CRLF as the line terminator: `my @output = $ssh->capture({stdin_data => "@cmd\r\n@quitcmd\r\n"});` [download] Note also, that `capture` may return some content even when an error is signaled and getting the error `OSSH_SLAVE_CMD_FAILED` may be non fatal.	[reply] [d/l] [select]
Re^6: How to solve Pseudo terminal issue OpenSSH by waytoperl (Beadle) on May 14, 2015 at 14:39 UTC
my @output = $ssh->capture({stdin_data => "@cmd\r\n@quitcmd\r\n"}); With above line, there is additional `PERIOD send` Any idea how to remove those `PERIODS` `# stdin, bytes written: 18 #> 73 68 6f 77 20 63 6c 6f 63 6b 0d 0a 65 78 69 74 0d 0a + \| show clock..exit.. =======>additional + period send from stdin_data # io3 mloop, cin: 0, cout: 1, cerr: 0 # io3 fast, cin: 0, cout: 1, cerr: 0 Pseudo-terminal will not be allocated because stdin is not a terminal.` [download]	[reply] [d/l] [select]
Re^7: How to solve Pseudo terminal issue OpenSSH by salva (Canon) on May 14, 2015 at 16:29 UTC
The periods are how non-printable characters are represented on the debugging output. It is the classic format for an hexdump. In this particular case, they correspond to the CRLF characters ("\r\n").	[reply]
Re^8: How to solve Pseudo terminal issue OpenSSH by waytoperl (Beadle) on May 14, 2015 at 16:54 UTC
Re^9: How to solve Pseudo terminal issue OpenSSH by salva (Canon) on May 14, 2015 at 17:10 UTC