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(Chilkat2-Python) Using sudo in an SSH Shell Session
Demonstrates how to run a command as sudo in a shell session.
Note: This example requires Chilkat v126.96.36.199 or greater.
import sys import chilkat2 # This example assumes Chilkat SSH/SFTP to have been previously unlocked. # See Unlock SSH for sample code. ssh = chilkat2.Ssh() port = 22 success = ssh.Connect("the-ssh-server.com",port) if (success != True): print(ssh.LastErrorText) sys.exit() # Authenticate using login/password: success = ssh.AuthenticatePw("theSshLogin","theSshPassword") if (success != True): print(ssh.LastErrorText) sys.exit() # Start a shell session. # (The QuickShell method was added in Chilkat v188.8.131.52) channelNum = ssh.QuickShell() if (channelNum < 0): print(ssh.LastErrorText) sys.exit() # Construct a StringBuilder with our command ("ls") run with "sudo" # Note: The line-endings are potentially important. Some SSH servers may # require either LF or CRLF line endings. (Unix/Linux/OSX servers typically # use bare-LF line endings. Windows servers likely use CRLF line endings.) # Using "sudo -S" causes the sudo prompt to be written to stderr, # and the password is read from stdin (i.e. from the echo command ouput). # The sudo commands -p option allows us to set the prompt, and we can set it to # the empty string, thus eliminating the prompt from the stderr completely. # This allows us to run the command as root (super-user) with no prompt. sbCommands = chilkat2.StringBuilder() sbCommands.Append("echo \"theSshPassword\" | sudo -S -p \"\" ls\n") # Add another command to echo a marker string that # we'll use in ChannelReceiveUntilMatch below. # The use of single quotes around 'IS' is a trick so that the output # of the command is "THIS IS THE END OF THE SCRIPT", but the terminal echo # includes the single quotes. This allows us to read until we see the actual # output of the last command. sbCommands.Append("echo THIS 'IS' THE END OF THE SCRIPT\n") # Send the commands.. success = ssh.ChannelSendString(channelNum,sbCommands.GetAsString(),"ansi") if (success != True): print(ssh.LastErrorText) sys.exit() # Send an EOF to indicate no more commands will be sent. # For brevity, we're not checking the return values of each method call. # Your code should check the success/failure of each call. success = ssh.ChannelSendEof(channelNum) # Receive output up to our marker. success = ssh.ChannelReceiveUntilMatch(channelNum,"THIS IS THE END OF THE SCRIPT","ansi",True) # Close the channel. # It is important to close the channel only after receiving the desired output. success = ssh.ChannelSendClose(channelNum) # Get any remaining output.. success = ssh.ChannelReceiveToClose(channelNum) # Get the complete output for all the commands in the session. print("--- output ----") print(ssh.GetReceivedText(channelNum,"ansi"))
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