Perl

Set a Remote File's Owner and Group

Demonstrates the Chilkat SFtp.SetOwnerAndGroup method, which sets the owner and group of a remote item. The arguments are the remote path (or handle), whether the first argument is a handle, and the new owner and group values.

Background: This is the SFTP equivalent of chown. Changing ownership is a privileged operation on Unix systems — ordinary users generally cannot give their files away — so expect it to fail unless the authenticated account has the necessary rights. It is most often used by administrative jobs that upload files which must then belong to a service account, such as a web server user.

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Perl

use chilkat();

$success = 0;

#  Demonstrates the SFtp.SetOwnerAndGroup method, which sets the owner and group of a remote item.
#  The 1st argument is the remote path (or handle), the 2nd (isHandle) indicates which, and the
#  3rd and 4th are the new owner and group.

$sftp = chilkat::CkSFtp->new();

#  Connect, authenticate, and initialize the SFTP subsystem.
$port = 22;
$success = $sftp->Connect("sftp.example.com",$port);
if ($success == 0) {
    print $sftp->lastErrorText() . "\r\n";
    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 == 0) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

$success = $sftp->InitializeSftp();
if ($success == 0) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

#  The 1st argument is a path, so isHandle is 0.  Changing ownership typically requires
#  elevated privileges on the server.
$isHandle = 0;
$success = $sftp->SetOwnerAndGroup("subdir/report.pdf",$isHandle,"www-data","www-data");
if ($success == 0) {
    print $sftp->lastErrorText() . "\r\n";
    exit;
}

print "Owner and group set." . "\r\n";

$sftp->Disconnect();