AutoIt

SSH Parallel Remote Commands on Single Server

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Shows how to execute multiple commands in parallel on a single SSH server and retrieve the command output for each. AutoIt

Local $bSuccess = False

; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

$oSsh = ObjCreate("Chilkat.Ssh")

Local $iPort = 22
$bSuccess = $oSsh.Connect("the-ssh-server.com",$iPort)
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Authenticate using login/password:
$bSuccess = $oSsh.AuthenticatePw("theSshLogin","theSshPassword")
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Start several commands on the server.
Local $iChannel1 = $oSsh.QuickCmdSend("df")
If ($iChannel1 < 0) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

Local $iChannel2 = $oSsh.QuickCmdSend("date")
If ($iChannel2 < 0) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

Local $iChannel3 = $oSsh.QuickCmdSend("echo hello world")
If ($iChannel3 < 0) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

; Now collect the results of each command.
Local $iPollTimeoutMs = 50
Local $iNumFinished = 0
While $iNumFinished < 3
    ; Check to see if anything has finished.
    ; QuickCmdCheck returns -1 if there are no errors and nothing else finished
    ; QuickCmdCheck returns -2 if there was an error (such as a lost connection)
    ; QuickCmdCheck returns a channel number if a channel finished.
Local $iChannel = $oSsh.QuickCmdCheck($iPollTimeoutMs)
    If ($iChannel = -2) Then
        ConsoleWrite($oSsh.LastErrorText & @CRLF)
        Exit
    EndIf

    If ($iChannel >= 0) Then
        ConsoleWrite("---- channel " & $iChannel & " finished ----" & @CRLF)
        ConsoleWrite($oSsh.GetReceivedText($iChannel,"ansi") & @CRLF)
        $iNumFinished = $iNumFinished + 1
    EndIf

Wend

; --------------
; Sample output:

; 	---- channel 105 finished ----
; 	hello world
; 
; 	---- channel 104 finished ----
; 	Thu Dec 22 17:43:58 CST 2016
; 
; 	---- channel 103 finished ----
; 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
; 	/dev/disk2    2176716032 265739728 1910464304    13% 33281464 238808038   12%   /
; 	devfs                382       382          0   100%      662         0  100%   /dev
; 	map -hosts             0         0          0   100%        0         0  100%   /net
; 	map auto_home          0         0          0   100%        0         0  100%   /home
; 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome