Can not setcwd to relative home directory (perl) Net::SFTP::Foreign

Question

I am trying to access remote server via SFTP. I am using Net::SFTP::Foreign for this. Problem arises when I try to change directory to to user's home directory. It is not allowing to change directory as in shell.

cd ~
cd ~/folder

My perl code is as follows.

 $sftp->setcwd("~/aast-backup/$backup_type") or die "unable to change cwd: " . $sftp->error;

Error shown

unable to change cwd: Couldn't get realpath for remote '/home/ftpkasi/aast-backup/~/aast-backup/differential

Please show some light into this. Thanks in advance...

Answer 1

The answer is in the documentation for the cwd method:

$sftp->cwd

Returns the remote current working directory.

When a relative remote path is passed to any of the methods on this package, this directory is used to compose the absolute path.

So the relative path you're passing to setcwd is being appended to your initial cwd . You can see this in the error message you get. The initial cwd is

/home/ftpkasi/aast-backup/

and when you call

$sftp->setcwd("~/aast-backup/$backup_type")

it tries to change to the directory

/home/ftpkasi/aast-backup/~/aast-backup/differential

which obviously doesn't exist.