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(MFC) SFTP Get/Set File Permission

Demonstrates how to set the permissions of a file on the SFTP server

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkSFtp.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkSFtp sftp;

    // Connect to the SSH/SFTP server.  
    const char *hostname = "sftp.example.com";
    int port = 22;
    bool success = sftp.Connect(hostname,port);
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Authenticate with the SSH server.  Chilkat SFTP supports
    // both password-based authenication as well as public-key
    // authentication.  This example uses password authenication.
    success = sftp.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // After authenticating, the SFTP subsystem must be initialized:
    success = sftp.InitializeSftp();
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Get the file permissions for the "hamlet.xml" file on the server.
    // The hamlet.xml file is located in the qa_data directory found under the HOME directory of the SSH user account.
    // We are passing the remote file path (we are not passing a file handle returned by a previous call to OpenFile).
    bool isHandle = false;
    bool followLinks = true;
    int permVal = sftp.GetFilePermissions("qa_data/hamlet.xml",followLinks,isHandle);
    if (permVal < 0) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Note: Filesystem permissions on Linux/Unix/MacOSX are typically written in octal (POSIX file permissions).  For example 0644 is octal.
    // To convert to decimal: octal 644 = 6*8^2 + 4*8 + 4 = 420 (decimal)
    // 
    // The server may return a permissions value (in octal) such as 100644.
    // The "100" indicates the file type, such as regular file or directory. 

    // Show the decimal value of the permissions
    strOut.append("decimal permissions value: ");
    strOut.appendInt(permVal);
    strOut.append("\r\n");

    // To set the file permissions, pass the integer value.
    // Let's change the permissions to 0664, which is 6*8^2 + 6*8 + 4 = 436 (decimal)
    success = sftp.SetPermissions("qa_data/hamlet.xml",isHandle,436);
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Success.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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