Topic "'synchronize' fails on NULL filename"

Author Message
KiloNiner
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Joined: 2010-02-16
Posts: 2
first off, I have no clue why there even is a file with a NULL filename (NULL as in nothing) or why the server allows it.

When trying to synchronize a folder containing a null filename, winscp commandline will fail as shown in the below log.
(Log has been washed for sensitive data):

Code:
. 2010-02-16 11:46:02.178 --------------------------------------------------------------------------
. 2010-02-16 11:46:02.178 WinSCP Version 4.2.5 (Build 624) (OS 5.2.3790 Service Pack 2)
. 2010-02-16 11:46:02.178 Login time: Tuesday, February 16, 2010 11:46:02 AM
. 2010-02-16 11:46:02.178 --------------------------------------------------------------------------
. 2010-02-16 11:46:02.178 Session name: [USERNAME]@[SERVER]
. 2010-02-16 11:46:02.178 Host name: [SERVER] (Port: 6671)
. 2010-02-16 11:46:02.178 User name: [USERNAME] (Password: Yes, Key file: No)
. 2010-02-16 11:46:02.178 Tunnel: No
. 2010-02-16 11:46:02.178 Transfer Protocol: SFTP
. 2010-02-16 11:46:02.178 Ping type: -, Ping interval: 30 sec; Timeout: 300 sec
. 2010-02-16 11:46:02.178 Proxy: none
. 2010-02-16 11:46:02.178 SSH protocol version: 2; Compression: No
. 2010-02-16 11:46:02.178 Bypass authentication: No
. 2010-02-16 11:46:02.178 Try agent: Yes; Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
. 2010-02-16 11:46:02.178 Ciphers: aes,blowfish,3des,WARN,arcfour,des; Ssh2DES: No
. 2010-02-16 11:46:02.178 SSH Bugs: -,-,-,-,-,-,-,-,-
. 2010-02-16 11:46:02.178 SFTP Bugs: -,-
. 2010-02-16 11:46:02.178 Return code variable: Autodetect; Lookup user groups: Yes
. 2010-02-16 11:46:02.178 Shell: default, EOL: 0
. 2010-02-16 11:46:02.178 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
. 2010-02-16 11:46:02.178 LS: ls -la, Ign LS warn: Yes, Scp1 Comp: No
. 2010-02-16 11:46:02.178 Local directory: default, Remote directory: home, Update: No, Cache: Yes
. 2010-02-16 11:46:02.178 Cache directory changes: Yes, Permanent: Yes
. 2010-02-16 11:46:02.178 DST mode: 1
. 2010-02-16 11:46:02.178 --------------------------------------------------------------------------
. 2010-02-16 11:46:02.193 Looking up host "[SERVER]"
. 2010-02-16 11:46:02.193 Connecting to [SERVER] port 6671
. 2010-02-16 11:46:02.818 Server version: SSH-2.0-0
. 2010-02-16 11:46:02.818 Using SSH protocol version 2
. 2010-02-16 11:46:02.818 We claim version: SSH-2.0-WinSCP_release_4.2.5
. 2010-02-16 11:46:02.818 Doing Diffie-Hellman group exchange
. 2010-02-16 11:46:03.162 Doing Diffie-Hellman key exchange with hash SHA-1
. 2010-02-16 11:46:03.428 Host key fingerprint is:
. 2010-02-16 11:46:03.428 ssh-dss 1024 [FINGERPRINT]
. 2010-02-16 11:46:03.428 Initialised AES-256 CBC client->server encryption
. 2010-02-16 11:46:03.428 Initialised HMAC-SHA1 client->server MAC algorithm
. 2010-02-16 11:46:03.428 Initialised AES-256 CBC server->client encryption
. 2010-02-16 11:46:03.428 Initialised HMAC-SHA1 server->client MAC algorithm
! 2010-02-16 11:46:03.834 Using username "[USERNAME]".
. 2010-02-16 11:46:03.928 Prompt (6, SSH password, , &Password: )
. 2010-02-16 11:46:03.928 Using stored password.
. 2010-02-16 11:46:03.928 Sent password
. 2010-02-16 11:46:04.318 Access granted
. 2010-02-16 11:46:04.396 Opened channel for session
. 2010-02-16 11:46:04.850 Started a shell/command
. 2010-02-16 11:46:04.850 --------------------------------------------------------------------------
. 2010-02-16 11:46:04.850 Using SFTP protocol.
. 2010-02-16 11:46:04.850 Doing startup conversation with host.
> 2010-02-16 11:46:04.850 Type: SSH_FXP_INIT, Size: 5, Number: -1
< 2010-02-16 11:46:04.943 Type: SSH_FXP_VERSION, Size: 5, Number: -1
. 2010-02-16 11:46:04.943 SFTP version 3 negotiated.
. 2010-02-16 11:46:04.943 We believe the server has signed timestamps bug
. 2010-02-16 11:46:04.943 We will use UTF-8 strings for status messages only
. 2010-02-16 11:46:04.943 Getting current directory name.
. 2010-02-16 11:46:04.943 Getting real path for '.'
> 2010-02-16 11:46:04.943 Type: SSH_FXP_REALPATH, Size: 10, Number: 16
< 2010-02-16 11:46:05.053 Type: SSH_FXP_NAME, Size: 23, Number: 16
. 2010-02-16 11:46:05.053 Real path is '/'
. 2010-02-16 11:46:05.053 Startup conversation with host finished.
. 2010-02-16 11:46:05.053 Collecting synchronization list for local directory '\\[SERVER]\[SHARE]\ftp' and remote directory '.', mode = 1, params = 2
. 2010-02-16 11:46:05.068 Listing directory "/".
> 2010-02-16 11:46:05.068 Type: SSH_FXP_OPENDIR, Size: 10, Number: 267
< 2010-02-16 11:46:05.193 Type: SSH_FXP_HANDLE, Size: 13, Number: 267
> 2010-02-16 11:46:05.193 Type: SSH_FXP_READDIR, Size: 13, Number: 524
< 2010-02-16 11:46:05.287 Type: SSH_FXP_NAME, Size: 2682, Number: 524
> 2010-02-16 11:46:05.287 Type: SSH_FXP_READDIR, Size: 13, Number: 780
< 2010-02-16 11:46:05.381 Type: SSH_FXP_STATUS, Size: 30, Number: 780
< 2010-02-16 11:46:05.381 Status code: 1
> 2010-02-16 11:46:05.381 Type: SSH_FXP_CLOSE, Size: 13, Number: 1028
. 2010-02-16 11:46:05.396 Synchronizing local directory '\\[SERVER]\[SHARE]\ftp\' with remote directory './', params = 2
. 2010-02-16 11:46:05.396 File: "/"
. 2010-02-16 11:46:05.396 Copying "/" to local directory started.
. 2010-02-16 11:46:05.396 Binary transfer mode selected.
* 2010-02-16 11:46:05.396 (ExtException)
. 2010-02-16 11:46:05.396 Asking user:
. 2010-02-16 11:46:05.396 '\\[SERVER]\[SHARE]\ftp\' is not file! ()
* 2010-02-16 11:46:05.396 (EScpSkipFile) '\\[SERVER]\[SHARE]\ftp\' is not file!
. 2010-02-16 11:46:05.396 Closing connection.
. 2010-02-16 11:46:05.396 Sending special code: 12
. 2010-02-16 11:46:05.396 Sent EOF message


Doing a dirlist and then trying a synchronize and a get on the server yields the following from winscp.com:

Code:
winscp> dir
drwxrwxrwx   0 0        0                0 Jul 19 19:44:00 2009 $$folder
dr-xr-xr-x   0 0        0                0 Jul 19 19:44:00 2009 folder2
drwxrwxrwx   0 0        0                0 Jul 19 19:44:00 2009 folder3
-rw-rw-rw-   0 0        0               19 Feb 13  7:52:00 2010
-rw-rw-rw-   0 0        0             1296 Feb 13  4:13:00 2010 FILE1.TXT
-rw-rw-rw-   0 0        0               12 Feb 13  4:32:00 2010 FILE2TXT
-rw-rw-rw-   0 0        0               15 Feb 13  4:53:00 2010 FILE3.TXT
-rw-rw-rw-   0 0        0             3277 Feb 13  4:12:00 2010 FILE4.TXT
-rw-rw-rw-   0 0        0         14910602 Feb 13  7:52:00 2010 file5.zip
-rw-rw-rw-   0 0        0        112204964 Feb 13 11:24:00 2010 FILE6.ZIP
-rw-rw-rw-   0 0        0        112710042 Feb 14  0:22:00 2010 FILE7.ZIP
-rw-rw-rw-   0 0        0         18288187 Feb 13  8:21:00 2010 file8.zip
-rw-rw-rw-   0 0        0         36814740 Feb 13  7:32:00 2010 FILE9.ZIP
-rw-rw-rw-   0 0        0         11851451 Feb 13  7:49:00 2010 FILE10.zip
-rw-rw-rw-   0 0        0               19 Feb 13  7:49:00 2010 file11.txt
-rw-rw-rw-   0 0        0              135 Feb 13  4:11:00 2010 FILE12.TXT
-rw-rw-rw-   0 0        0           277439 Feb 13  4:13:00 2010 FILE13.TXT
-rw-rw-rw-   0 0        0            85444 Feb 13  1:06:00 2010 FILE14.TXT
-rw-rw-rw-   0 0        0           349336 Feb 13  1:07:00 2010 FILE15.TXT
-rw-rw-rw-   0 0        0           625574 Feb 13  7:16:00 2010 FILE16.TXT
-rw-rw-rw-   0 0        0          1138752 Feb 13  1:01:00 2010 FILE17.TXT

winscp> synchronize local
Comparing...
Local '\\[SERVER]\[SHARE]\ftp' <= Remote '/'
Synchronizing...
'\\[SERVER]\[SHARE]\ftp\' is not file!
(A)bort, (R)etry, (S)kip, Ski(p) all: Abort
winscp> get *
$$folder                |          0 KiB |    0.0 KiB/s | binary |   0%
folder2                 |          0 KiB |    0.0 KiB/s | binary |   0%
folder3                 |          0 KiB |    0.0 KiB/s | binary |   0%
'\\[SERVER]\[SHARE]\ftp\' is not file!
(A)bort, (R)etry, (S)kip, Ski(p) all: Abort


Note line four of the dir and the absence of a filename. Listing the same directory in winscp presents an empty filename as well and pressing delete asks for confirmation to delete ''.

I can't think of a proper way to retrieve a file with a NULL filename as NTFS wouldn't see the humor in it either so I'd suggest skipping such files or have a repeatable renaming scheme.
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martin
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Site Admin
Joined: 2002-12-10
Posts: 25034
Location: Prague, Czechia
How do you create file with empty name?
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Martin Prikryl
KiloNiner
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Joined: 2010-02-16
Posts: 2
The short answer is that I don't.

The server is owned and operated by a third party. My best guess is that the file does have a name on their server but that they mangle it somehow - they sent me an ls they had made using PSFTP that corresponded perfectly with what I was seeing in regards to not showing a filename.
martin
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Site Admin
Joined: 2002-12-10
Posts: 25034
Location: Prague, Czechia
This issue has been added to tracker.
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Martin Prikryl
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