Is flags from SFTPFileAttributes correct?

[piperun]

I've tried my hardest to research just what "flags" are supposed to represent, my educated guess was its file mode, but the issue is that every file whenever it's a folder or file returns the int 15, which to me looks quite suspiciously either as a bug or that it's not intended to be libssh2 way of giving you the type of a file object.

[Red-M]

This is a little convoluted but flag is actually the flag modes that the SFTP object is opened with. Please see these lines for an example.

I'll have to see what documentation I can put up to solve this issue. This may take a bit longer to correct, as there are patches in my fork of ssh2-python that would change how this documentation would be presented.

[piperun]

Aha, I could've sworn I saw somewhere in libssh2 that you could get the inode (7) info from a file.

[Red-M]

You might be able to get that with redssh.sftp.RedSFTP.stat() as per this documentation in libssh2 but I'm not sure the right symbols/functions are exposed for that.

Let me know if something needs to be done to enable this request.

[piperun]

From what I've deciphered from ssh2-python, you need an ssh2.sftp_handle.SFTPHandle object to call it's internal fstat(self), the issue is afaik the only way to get an ssh2.sftp_handle.SFTPHandle object is to open the file/folder.

So unless I'm doing something very wrong:

path = sftp.opendir("/path") # We get a SFTPHandle
 # we can get this folder's file stats
# Although everytime I try fstat it just gives me -37 i.e. "file/folder" is empty, 
# even with a simple open()
print(path.fstat())

#However if we want all folders/files stats
for fileobject in path.readdir():
    print(fileobject) # Will return (int, name, SFTPAttributes)
# SFTPAttributes will not be from fstat() afaik.

And so it becomes a bit of a chicken and egg problem since I need to know if it's a file or folder before I can open the file/folder with either open() or opendir() and get the SFTPHandle which supposedly has fstat().

[Red-M]

-37 is EAGAIN, you need to do the call again, try looking at the other redssh.sftp.RedSFTP functions and use the _block() calls like that on your fstat calls. I'll make something up in about 12 hours that will be able to get this done.

On Sat., 21 Mar. 2020, 2:59 am piperun, notifications@github.com wrote:

From what I've deciphered from ssh2-python, you need an ssh2.sftp_handle.SFTPHandle object to call it's internal fstat(self), the issue is afaik the only way to get an ssh2.sftp_handle.SFTPHandle object is to open the file/folder.

So unless I'm doing something very wrong:

path = sftp.opendir("/path") # We get a SFTPHandle

we can get this folder's file stats

Although everytime I try fstat it just gives me -37 i.e. "file/folder" is empty,

even with a simple open()

print(path.fstat())

However if we want all folders/files stats

for fileobject in path.readdir(): print(fileobject) # Will return (int, name, SFTPAttributes)

However SFTPAttributes will not be from fstat() afaik.

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[piperun]

Ah I see, one more thing is that I'm getting AttributeError: __enter__ if I do:

with ssh.sftp.open(
         "file", 
         redssh.libssh2.LIBSSH2_FXF_READ, 
         redssh.libssh2.LIBSSH2_SFTP_S_IRUSR, 
         True) as remote_file: `

So, so far I've been stuck with ssh2 fileobject.

[Red-M]

So I tested this out.

Directories will not allow an fstat() call, files will work.

Just be aware that this code below is not how the library should be used. I need to make a wrapping class for ssh2.sftp_handle.SFTPHandle so that it will work with non-blocking mode for RedSSH.

import redssh
usr = "user"
passw = None
rs = redssh.RedSSH()
rs.connect(hostname="hostname", username=usr, password=passw)
rs.start_sftp()
fs = rs.sftp.open_dir("/home")
rs._block(fs.fstat)
# Failure
fs = rs.sftp.open("/home/"+usr+"/.bashrc",redssh.sftp.DEFAULT_READ_MODE,redssh.sftp.DEFAULT_FILE_MODE)
rs._block(fs.fstat)
# Success

[Red-M]

I've added some functions to address this however, they do not have access to inodes. I think some patches in libssh2 or ssh2-python will be required to get access to inode information over SFTP.

[Red-M]

So reading through the documentation from libssh2 for fstat() shows that libssh2 would require changes to support inode data over SFTP.

[piperun]

Ah that's unfortunate, I could be mistaking what VFS does but I did see it returning inodes info from statvfs().

[Red-M]

Yeah statvfs() does support inodes.

If ssh2-python doesn't support it, let me know and I'll update my fork to include the required data.

[Red-M]

Please re-open if this isn't resolved.