Running interactive commands in Paramiko

Question

I m trying to run an interactive command through paramiko   The cmd execution tries to prompt for a password but I do not know how to supply the password through paramiko s exec command and the execution hangs   Is there a way to send values to the terminal if a cmd execution expects input interactively   ssh   paramiko SSHClient   ssh connect server  username username  password password  ssh stdin  ssh stdout  ssh stderr   ssh exec command  psql -U factory -d factory -f  tmp data sql     Does anyone know how this can addressed  Thank you

User · Answer

I m not familiar with paramiko  but this may work    ssh stdin write  input value   ssh stdin flush     For information on stdin   http   docs python org library sys html highlight stdin sys stdin

User · Answer

The full paramiko distribution ships with a lot of good demos   In the demos subdirectory  demo py and interactive py have full interactive TTY examples which would probably be overkill for your situation   In your example above ssh stdin acts like a standard Python file object  so ssh stdin write should work so long as the channel is still open   I ve never needed to write to stdin  but the docs suggest that a channel is closed as soon as a command exits  so using the standard stdin write method to send a password up probably won t work  There are lower level paramiko commands on the channel itself that give you more control - see how the SSHClient exec command method is implemented for all the gory details

User · Answer

You can use this method to send whatever confirmation message you want like  OK  or the password  This is my solution with an example   def SpecialConfirmation command  message  reply       net connect config mode        To enter config mode     net connect remote conn sendall str command    n        time sleep 3      output   net connect remote conn recv 65535  decode  utf-8       ReplyAppend        if str message  in output          for i in range 0  len reply                 ReplyAppend  str reply i     n          net connect remote conn sendall ReplyAppend          output   net connect remote conn recv 65535  decode  utf-8        print  output      return output  CryptoPkiEnroll         no   no   yes    output SpecialConfirmation   crypto pki enroll TCA   Password    CryptoPkiEnroll   print  output

User · Answer

I had the same problem trying to make an interactive ssh session using ssh  a fork of Paramiko   I dug around and found this article   Updated link  last version before the link generated a 404   http   web archive org web 20170912043432 http   jessenoller com 2009 02 05 ssh-programming-with-paramiko-completely-different   To continue your example you could do  ssh stdin  ssh stdout  ssh stderr   ssh exec command  psql -U factory -d factory -f  tmp data sql   ssh stdin write  password n   ssh stdin flush   output   ssh stdout read     The article goes more in depth  describing a fully interactive shell around exec command  I found this a lot easier to use than the examples in the source   Original link  http   jessenoller com 2009 02 05 ssh-programming-with-paramiko-completely-different

User · Answer

I had the same problem trying to make an interactive ssh session using ssh  a fork of Paramiko   I dug around and found this article   Updated link  last version before the link generated a 404   http   web archive org web 20170912043432 http   jessenoller com 2009 02 05 ssh-programming-with-paramiko-completely-different   To continue your example you could do  ssh stdin  ssh stdout  ssh stderr   ssh exec command  psql -U factory -d factory -f  tmp data sql   ssh stdin write  password n   ssh stdin flush   output   ssh stdout read     The article goes more in depth  describing a fully interactive shell around exec command  I found this a lot easier to use than the examples in the source   Original link  http   jessenoller com 2009 02 05 ssh-programming-with-paramiko-completely-different

User · Answer

The full paramiko distribution ships with a lot of good demos   In the demos subdirectory  demo py and interactive py have full interactive TTY examples which would probably be overkill for your situation   In your example above ssh stdin acts like a standard Python file object  so ssh stdin write should work so long as the channel is still open   I ve never needed to write to stdin  but the docs suggest that a channel is closed as soon as a command exits  so using the standard stdin write method to send a password up probably won t work  There are lower level paramiko commands on the channel itself that give you more control - see how the SSHClient exec command method is implemented for all the gory details

User · Answer

You need Pexpect to get the best of both worlds  expect and ssh wrappers

User · Answer

You can use this method to send whatever confirmation message you want like  OK  or the password  This is my solution with an example   def SpecialConfirmation command  message  reply       net connect config mode        To enter config mode     net connect remote conn sendall str command    n        time sleep 3      output   net connect remote conn recv 65535  decode  utf-8       ReplyAppend        if str message  in output          for i in range 0  len reply                 ReplyAppend  str reply i     n          net connect remote conn sendall ReplyAppend          output   net connect remote conn recv 65535  decode  utf-8        print  output      return output  CryptoPkiEnroll         no   no   yes    output SpecialConfirmation   crypto pki enroll TCA   Password    CryptoPkiEnroll   print  output

User · Answer

Take a look at example and do in similar way    sorce from http   jessenoller com 2009 02 05 ssh-programming-with-paramiko-completely-different         ssh connect  127 0 0 1   username  jesse            password  lol       stdin  stdout  stderr   ssh exec command           sudo dmesg       stdin write  lol n       stdin flush       data   stdout read splitlines       for line in data          if line split      0      AirPort               print line

User · Answer

I m not familiar with paramiko  but this may work    ssh stdin write  input value   ssh stdin flush     For information on stdin   http   docs python org library sys html highlight stdin sys stdin

User · Answer

I m not familiar with paramiko  but this may work    ssh stdin write  input value   ssh stdin flush     For information on stdin   http   docs python org library sys html highlight stdin sys stdin

User · Answer

The full paramiko distribution ships with a lot of good demos   In the demos subdirectory  demo py and interactive py have full interactive TTY examples which would probably be overkill for your situation   In your example above ssh stdin acts like a standard Python file object  so ssh stdin write should work so long as the channel is still open   I ve never needed to write to stdin  but the docs suggest that a channel is closed as soon as a command exits  so using the standard stdin write method to send a password up probably won t work  There are lower level paramiko commands on the channel itself that give you more control - see how the SSHClient exec command method is implemented for all the gory details

User · Answer

Take a look at example and do in similar way    sorce from http   jessenoller com 2009 02 05 ssh-programming-with-paramiko-completely-different         ssh connect  127 0 0 1   username  jesse            password  lol       stdin  stdout  stderr   ssh exec command           sudo dmesg       stdin write  lol n       stdin flush       data   stdout read splitlines       for line in data          if line split      0      AirPort               print line

User · Answer

ssh   paramiko SSHClient   ssh set missing host key policy paramiko AutoAddPolicy    ssh connect server IP 22 username  password    stdin  stdout  stderr   ssh exec command   Users lteue Downloads uecontrol-CXC 173 6456-R32A01 uecontrol sh -host localhost    alldata      while not stdout channel exit status ready       solo line                   Print stdout data when available    if stdout channel recv ready            Retrieve the first 1024 bytes       solo line   stdout channel recv 1024         alldata    solo line    if cmp solo line  uec gt       0        Change Conditionals to your code here        if num of input    0         data buffer                for cmd in commandList           print cmd        stdin channel send cmd           send input commmand 1       num of input    1      if num of input    1         stdin channel send  q  n          send input commmand 2   in my code is exit the interactive session  the connect will close        num of input    1  print alldata ssh close                   Why the stdout read   will hang if use dierectly without checking  stdout channel recv ready    in while stdout channel exit status ready       For my case  after run command on remote server   the session is waiting for user input    after input  q   it will close the connection    But before inputting  q    the stdout read   will waiting for EOF seems this methord does not works if buffer is larger     I tried stdout read 1  in while   it works  I tried stdout readline   in while   it works also   stdin  stdout  stderr     ssh exec command   Users lteue Downloads uecontrol    stdout read    will hang

User · Answer

ssh   paramiko SSHClient   ssh set missing host key policy paramiko AutoAddPolicy    ssh connect server IP 22 username  password    stdin  stdout  stderr   ssh exec command   Users lteue Downloads uecontrol-CXC 173 6456-R32A01 uecontrol sh -host localhost    alldata      while not stdout channel exit status ready       solo line                   Print stdout data when available    if stdout channel recv ready            Retrieve the first 1024 bytes       solo line   stdout channel recv 1024         alldata    solo line    if cmp solo line  uec gt       0        Change Conditionals to your code here        if num of input    0         data buffer                for cmd in commandList           print cmd        stdin channel send cmd           send input commmand 1       num of input    1      if num of input    1         stdin channel send  q  n          send input commmand 2   in my code is exit the interactive session  the connect will close        num of input    1  print alldata ssh close                   Why the stdout read   will hang if use dierectly without checking  stdout channel recv ready    in while stdout channel exit status ready       For my case  after run command on remote server   the session is waiting for user input    after input  q   it will close the connection    But before inputting  q    the stdout read   will waiting for EOF seems this methord does not works if buffer is larger     I tried stdout read 1  in while   it works  I tried stdout readline   in while   it works also   stdin  stdout  stderr     ssh exec command   Users lteue Downloads uecontrol    stdout read    will hang

User · Answer

The full paramiko distribution ships with a lot of good demos   In the demos subdirectory  demo py and interactive py have full interactive TTY examples which would probably be overkill for your situation   In your example above ssh stdin acts like a standard Python file object  so ssh stdin write should work so long as the channel is still open   I ve never needed to write to stdin  but the docs suggest that a channel is closed as soon as a command exits  so using the standard stdin write method to send a password up probably won t work  There are lower level paramiko commands on the channel itself that give you more control - see how the SSHClient exec command method is implemented for all the gory details

User · Answer

You need Pexpect to get the best of both worlds  expect and ssh wrappers

User · Answer

I m not familiar with paramiko  but this may work    ssh stdin write  input value   ssh stdin flush     For information on stdin   http   docs python org library sys html highlight stdin sys stdin

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