PowerShell

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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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  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.

$sftp = New-Object Chilkat.SFtp

#  Connect, authenticate, and initialize the SFTP subsystem.
$port = 22
$success = $sftp.Connect("sftp.example.com",$port)
if ($success -eq $false) {
    $($sftp.LastErrorText)
    exit
}

#  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 -eq $false) {
    $($sftp.LastErrorText)
    exit
}

$success = $sftp.InitializeSftp()
if ($success -eq $false) {
    $($sftp.LastErrorText)
    exit
}

#  The 1st argument is a path, so isHandle is $false.
$isHandle = $false

#  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 -eq $false) {
    $($sftp.LastErrorText)
    exit
}

$("Permissions set.")

$sftp.Disconnect()