Perl

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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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# 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.

my $sftp = Chilkat2::SFtp->new;

# Connect, authenticate, and initialize the SFTP subsystem.
my $port = 22;
my $success = $sftp->Connect('sftp.example.com', $port);
if (!$success) {
    print $sftp->LastErrorText, "\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.
my $password = 'mySshPassword';

$success = $sftp->AuthenticatePw('mySshLogin', $password);
if (!$success) {
    print $sftp->LastErrorText, "\n";
    exit;
}

$success = $sftp->InitializeSftp();
if (!$success) {
    print $sftp->LastErrorText, "\n";
    exit;
}

# The 1st argument is a path, so isHandle is 0.
my $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.
my $permissions = 493;
$success = $sftp->SetPermissions('subdir/script.sh', $isHandle, $permissions);
if (!$success) {
    print $sftp->LastErrorText, "\n";
    exit;
}

print "Permissions set.\n";

$sftp->Disconnect();