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(PowerBuilder) SSH Parallel Remote Commands on Single Server

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

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Ssh
integer li_Port
integer li_Success
integer li_Channel1
integer li_Channel2
integer li_Channel3
integer li_PollTimeoutMs
integer li_NumFinished
integer li_Channel

//  This example assumes Chilkat SSH/SFTP to have been previously unlocked.
//  See Unlock SSH for sample code.

loo_Ssh = create oleobject
li_rc = loo_Ssh.ConnectToNewObject("Chilkat_9_5_0.Ssh")
if li_rc < 0 then
    destroy loo_Ssh
    MessageBox("Error","Connecting to COM object failed")
    return
end if

li_Port = 22
li_Success = loo_Ssh.Connect("the-ssh-server.com",li_Port)
if li_Success <> 1 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

//  Authenticate using login/password:
li_Success = loo_Ssh.AuthenticatePw("theSshLogin","theSshPassword")
if li_Success <> 1 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

//  Start several commands on the server.
li_Channel1 = loo_Ssh.QuickCmdSend("df")
if li_Channel1 < 0 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

li_Channel2 = loo_Ssh.QuickCmdSend("date")
if li_Channel2 < 0 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

li_Channel3 = loo_Ssh.QuickCmdSend("echo hello world")
if li_Channel3 < 0 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

//  Now collect the results of each command.
li_PollTimeoutMs = 50
li_NumFinished = 0
do while li_NumFinished < 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.
    li_Channel = loo_Ssh.QuickCmdCheck(li_PollTimeoutMs)
    if li_Channel = -2 then
        Write-Debug loo_Ssh.LastErrorText
        destroy loo_Ssh
        return
    end if

    if li_Channel >= 0 then
        Write-Debug "---- channel " + string(li_Channel) + " finished ----"
        Write-Debug loo_Ssh.GetReceivedText(li_Channel,"ansi")
        li_NumFinished = li_NumFinished + 1
    end if

loop

//  --------------
//  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


destroy loo_Ssh

 

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