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DataFlex

Get a Remote File's POSIX Permissions

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Demonstrates the Chilkat SFtp.GetFilePermissions method, which returns a remote item's complete POSIX mode value. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: The returned mode is the full POSIX value, meaning it packs the file-type bits together with the owner/group/other permission bits — so a regular file with 0755 permissions comes back as decimal 33261 (octal 0100755), not 493. The permission bits people usually care about are the low nine. To set permissions rather than read them, use SetPermissions.

Chilkat DataFlex Downloads

DataFlex
Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoSftp
    Integer iPort
    String sPassword
    Boolean iBFollowLinks
    Boolean iBIsHandle
    Integer iMode
    String sTemp1

    Move False To iSuccess

    //  Demonstrates the SFtp.GetFilePermissions method, which returns a remote item's complete POSIX
    //  mode value.  The 1st argument is the remote path (or handle), the 2nd selects whether symbolic
    //  links are followed, and the 3rd indicates whether the 1st argument is a handle.

    Get Create (RefClass(cComChilkatSFtp)) To hoSftp
    If (Not(IsComObjectCreated(hoSftp))) Begin
        Send CreateComObject of hoSftp
    End

    //  Connect, authenticate, and initialize the SFTP subsystem.
    Move 22 To iPort
    Get ComConnect Of hoSftp "sftp.example.com" iPort To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    Move "mySshPassword" To sPassword

    Get ComAuthenticatePw Of hoSftp "mySshLogin" sPassword To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComInitializeSftp Of hoSftp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
    //  The 3rd argument (bIsHandle) is False here because the 1st argument is a path, not an
    //  open handle.
    Move True To iBFollowLinks
    Move False To iBIsHandle

    Get ComGetFilePermissions Of hoSftp "subdir/script.sh" iBFollowLinks iBIsHandle To iMode
    If (iMode < 0) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  The value is the complete POSIX mode, which combines the file-type bits with the
    //  owner/group/other permission bits (the low 9 bits).  For example, a mode of 33261 (octal
    //  0100755) is a regular file with 0755 permissions.
    Showln "POSIX mode (decimal): " iMode

    Send ComDisconnect To hoSftp


End_Procedure