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(Unicode C++) SSH Exec (Execute Command Line)

Shows how to execute a command on an SSH server and retrieve the command output.

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MS Visual C/C++

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#include <CkSshW.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSshW ssh;

    // Connect to an SSH server:
    const wchar_t *hostname = 0;
    int port;

    // Hostname may be an IP address or hostname:
    hostname = L"192.168.1.108";
    port = 22;

    bool success = ssh.Connect(hostname,port);
    if (success != true) {
        wprintf(L"%s\n",ssh.lastErrorText());
        return;
    }

    // Wait a max of 5 seconds when reading responses..
    ssh.put_IdleTimeoutMs(5000);

    // Authenticate using login/password:
    success = ssh.AuthenticatePw(L"myLogin",L"myPassword");
    if (success != true) {
        wprintf(L"%s\n",ssh.lastErrorText());
        return;
    }

    // Open a session channel.  (It is possible to have multiple
    // session channels open simultaneously.)
    int channelNum;
    channelNum = ssh.OpenSessionChannel();
    if (channelNum < 0) {
        wprintf(L"%s\n",ssh.lastErrorText());
        return;
    }

    // The SendReqExec method starts a command on the remote
    // server.   The syntax of the command string depends on the
    // default shell used on the remote server to run the command.
    // On Windows systems it is CMD.EXE.  On UNIX/Linux
    // systems the user's default shell is typically defined in /etc/password.

    // Here are some examples of command lines for <b>Windows SSH servers</b>:

    // Get a directory listing:
    const wchar_t *cmd1 = L"dir";

    // Do a nameserver lookup:
    const wchar_t *cmd2 = L"nslookup chilkatsoft.com";

    // List a specific directory.  Given that the shell is CMD.EXE, backslashes must
    // be used:
    const wchar_t *cmd3 = L"dir \\temp";

    // Execute a sequence of commands.  The syntax for CMD.EXE may be found
    // here: http://technet.microsoft.com/en-us/library/bb490880.aspx.  Notice how the commands
    // are separated by "&&" and the entire command must be enclosed in quotes:
    const wchar_t *cmd4 = L"\"cd \\temp&&dir\"";

    // Here are two examples of command lines for <b>Linux/UNIX SSH servers</b>:

    // Get a directory listing:
    const wchar_t *cmd5 = L"ls -l /tmp";

    // Run a series of commands (syntax may depend on your default shell):
    const wchar_t *cmd6 = L"cd /etc; ls -la";

    // Request a directory listing on the remote server:
    // If your server is Windows, change the string from "ls" to "dir"
    success = ssh.SendReqExec(channelNum,L"ls");
    if (success != true) {
        wprintf(L"%s\n",ssh.lastErrorText());
        return;
    }

    // Call ChannelReceiveToClose to read 
    // output until the server's corresponding "channel close" is received.
    success = ssh.ChannelReceiveToClose(channelNum);
    if (success != true) {
        wprintf(L"%s\n",ssh.lastErrorText());
        return;
    }

    // Let's pickup the accumulated output of the command:
    const wchar_t *cmdOutput = ssh.getReceivedText(channelNum,L"ansi");
    if (ssh.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",ssh.lastErrorText());
        return;
    }

    // Display the remote shell's command output:
    wprintf(L"%s\n",cmdOutput);

    // Disconnect
    ssh.Disconnect();
    }

 

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