B4X

Check if File Exists

See more SFTP Examples

Demonstrates how to check to see if a file exists. B4X

Dim success As Boolean = False

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

Dim sftp As ChilkatSFtp
sftp.Initialize("sftp")

'  Connect to the SSH server.  
Dim hostname As String = "sftp.example.com"
Dim port As Int = 22
success = sftp.Connect(hostname, port)
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  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 Then
    Log(sftp.LastErrorText)
    Return
End If


'  After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  Check to see if a file exists

'  The return value is one of the following values:
'  -1: Unable to check. Examine the LastErrorText to determine the reason for failure.
'  0: File does not exist.
'  1: The regular file exists.
'  2: It exists, but it is a directory.
'  3: It exists, but it is a symlink (only possible if followLinks is false)
'  4: It exists, but it is a special filesystem entry type.
'  5: It exists, but it is an unkown filesystem entry type.
'  6: It exists, but it is an socket filesystem entry type.
'  7: It exists, but it is an char device entry type.
'  8: It exists, but it is an block device entry type.
'  9: It exists, but it is an FIFO entry type.

Dim followLinks As Boolean = True
Dim status As Int = sftp.FileExists("someDir/someFile.txt", followLinks)
If status < 0 Then
    Log(sftp.LastErrorText)
    Return
End If


Log("status = " & status)

Log("Success")