Lianja

SSH Parallel Remote Commands on Single Server

See more SSH Examples

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

llSuccess = .F.

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

loSsh = createobject("CkSsh")

lnPort = 22
llSuccess = loSsh.Connect("the-ssh-server.com",lnPort)
if (llSuccess <> .T.) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

// Authenticate using login/password:
llSuccess = loSsh.AuthenticatePw("theSshLogin","theSshPassword")
if (llSuccess <> .T.) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

// Start several commands on the server.
lnChannel1 = loSsh.QuickCmdSend("df")
if (lnChannel1 < 0) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

lnChannel2 = loSsh.QuickCmdSend("date")
if (lnChannel2 < 0) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

lnChannel3 = loSsh.QuickCmdSend("echo hello world")
if (lnChannel3 < 0) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

// Now collect the results of each command.
lnPollTimeoutMs = 50
lnNumFinished = 0
do while lnNumFinished < 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.
    lnChannel = loSsh.QuickCmdCheck(lnPollTimeoutMs)
    if (lnChannel = -2) then
        ? loSsh.LastErrorText
        release loSsh
        return
    endif

    if (lnChannel >= 0) then
        ? "---- channel " + str(lnChannel) + " finished ----"
        ? loSsh.GetReceivedText(lnChannel,"ansi")
        lnNumFinished = lnNumFinished + 1
    endif

enddo

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


release loSsh