Visual FoxPro

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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LOCAL lnSuccess
LOCAL loSftp
LOCAL lnPort
LOCAL lcPassword
LOCAL lnIsHandle
LOCAL lnPermissions

lnSuccess = 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.

loSftp = CreateObject('Chilkat.SFtp')

*  Connect, authenticate, and initialize the SFTP subsystem.
lnPort = 22
lnSuccess = loSftp.Connect("sftp.example.com",lnPort)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    CANCEL
ENDIF

*  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.
lcPassword = "mySshPassword"

lnSuccess = loSftp.AuthenticatePw("mySshLogin",lcPassword)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    CANCEL
ENDIF

lnSuccess = loSftp.InitializeSftp()
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    CANCEL
ENDIF

*  The 1st argument is a path, so isHandle is 0.
lnIsHandle = 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.
lnPermissions = 493
lnSuccess = loSftp.SetPermissions("subdir/script.sh",lnIsHandle,lnPermissions)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    CANCEL
ENDIF

? "Permissions set."

loSftp.Disconnect()

RELEASE loSftp