VBScript

Set a Remote File's POSIX Permissions

Demonstrates the Chilkat SFtp.SetPermissions method, which sets the POSIX permission bits of a remote item. The arguments are the remote path (or handle), whether the first argument is a handle, and the permission bits. Pass the permission bits only, not the file-type bits.

Background: This is the SFTP equivalent of chmod. Common values, written as octal, are 0644 for a normal file, 0600 for a private file, and 0755 for an executable or a directory. In languages without octal literals the same values must be given in decimal or hexadecimal (for example 0755 is decimal 493). Setting an executable bit after uploading a script is the classic use.

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Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

'  Demonstrates the SFtp.SetPermissions method, which sets the POSIX permission bits of a remote
'  item.  The 1st argument is the remote path (or handle), the 2nd (isHandle) indicates which,
'  and the 3rd is the permission bits.

set sftp = CreateObject("Chilkat.SFtp")

'  Connect, authenticate, and initialize the SFTP subsystem.
port = 22
success = sftp.Connect("sftp.example.com",port)
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

'  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.
password = "mySshPassword"

success = sftp.AuthenticatePw("mySshLogin",password)
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

success = sftp.InitializeSftp()
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

'  The 1st argument is a path, so isHandle is 0.
isHandle = 0

'  Pass the permission bits, not the file-type bits.  0755 gives the owner read/write/execute and
'  read/execute to group and others -- a common mode for an executable script.
permissions = 493
success = sftp.SetPermissions("subdir/script.sh",isHandle,permissions)
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Permissions set.")

sftp.Disconnect 

outFile.Close