Does this FAQ answer your problem?
https://winscp.net/eng/docs/faq_not_owner

Hello,
I have following problem. My colleagues upload files via these two ways
1. Drupal web app - it's apache, running as apache:apache
2. WinSCP - user ts1:apache

Users apache and ts1 have primary group apache and they have set umask 002.
Umask affects all users's processes to create files with rights rw-rw-r-- (+w for group vs. default conf.)

I have a file a.txt uploaded using Drupal (1).
If I rewrite a.txt usign Apache(2), the file is rewritten but I recieve an error message: Upload of file 'a.txt' was successful, but error occurred while setting the permissions and/or timestamp. If the problem persists, turn on 'Ignore permission errors' option. ("Permission denied.
See the log snippet below.

If I do this using vi editor in ssh, I can edit a file without an error.

I know I can check the Ignore permission option. But is there a way where I hadn't to mask permission errors? Can WinSCP use umask settings in ~/.profile?


Jan


Log:

. 2011-11-29 14:25:41.856 Remote file 'a.txt' already exists. Overwrite?
. 2011-11-29 14:25:41.856
. 2011-11-29 14:25:41.856 New: 7 bytes, 29.11.2011 14:25:33
. 2011-11-29 14:25:41.856 Existing: 5 bytes, 29.11.2011 14:11:49 ()
> 2011-11-29 14:25:43.513 Type: SSH_FXP_OPEN, Size: 49, Number: 4611
< 2011-11-29 14:25:43.550 Type: SSH_FXP_HANDLE, Size: 13, Number: 4611
> 2011-11-29 14:25:43.551 Type: SSH_FXP_WRITE, Size: 32, Number: 5126
> 2011-11-29 14:25:43.551 Type: SSH_FXP_CLOSE, Size: 13, Number: 5380
> 2011-11-29 14:25:43.551 Type: SSH_FXP_SETSTAT, Size: 45, Number: 4873
< 2011-11-29 14:25:43.553 Type: SSH_FXP_STATUS, Size: 24, Number: 5126
< 2011-11-29 14:25:43.555 Type: SSH_FXP_STATUS, Size: 24, Number: 5380
< 2011-11-29 14:25:43.555 Status code: 0
< 2011-11-29 14:25:43.555 Type: SSH_FXP_STATUS, Size: 34, Number: 4873
< 2011-11-29 14:25:43.555 Status code: 3, Message: 4873, Server: Permission denied, Language:
* 2011-11-29 14:25:43.555 (ETerminal) Permission denied.
* 2011-11-29 14:25:43.555 Error code: 3
* 2011-11-29 14:25:43.555 Error message from server: Permission denied
* 2011-11-29 14:25:43.555 Request code: 9
. 2011-11-29 14:25:43.556 Asking user:
. 2011-11-29 14:25:43.556 Upload of file 'a.txt' was successful, but error occurred while setting the permissions and/or timestamp. If the problem persists, turn on 'Ignore permission errors' option. ("Permission denied.
. 2011-11-29 14:25:43.556 Error code: 3
. 2011-11-29 14:25:43.556 Error message from server: Permission denied
. 2011-11-29 14:25:43.556 Request code: 9")
* 2011-11-29 14:26:04.785 (EScpSkipFile) Upload of file 'a.txt' was successful, but error occurred while setting the permissions and/or timestamp. If the problem persists, turn on 'Ignore permission errors' option.
* 2011-11-29 14:26:04.785 Permission denied.
* 2011-11-29 14:26:04.785 Error code: 3
* 2011-11-29 14:26:04.785 Error message from server: Permission denied
* 2011-11-29 14:26:04.785 Request code: 9
. 2011-11-29 14:26:04.817 Listing directory "/home/tsadmin/test".
> 2011-11-29 14:26:04.817 Type: SSH_FXP_OPENDIR, Size: 27, Number: 5643
< 2011-11-29 14:26:04.818 Type: SSH_FXP_HANDLE, Size: 13, Number: 5643
> 2011-11-29 14:26:04.819 Type: SSH_FXP_READDIR, Size: 13, Number: 5900
< 2011-11-29 14:26:04.820 Type: SSH_FXP_NAME, Size: 313, Number: 5900
> 2011-11-29 14:26:04.820 Type: SSH_FXP_READDIR, Size: 13, Number: 6156
< 2011-11-29 14:26:04.822 Type: SSH_FXP_STATUS, Size: 28, Number: 6156
< 2011-11-29 14:26:04.822 Status code: 1
> 2011-11-29 14:26:04.822 Type: SSH_FXP_CLOSE, Size: 13, Number: 6404