Config directive, temp_dir, does not support relative path under Windows

[ekovarski]

It appears that using a relative path for temp_dir under Windows is not fully supported.

While Roundcube does function without an absolute path, some functions, such as attaching files fail intermittently without any errors.

For example, when attaching files the system would upload the attachment but when you hit send the message would be sent without any attachments.

Using an absolute path resolves the issue.

[till]

Before I can accept the ticket, please provide the following:

a) the error occurred
b) your relative path
c) your absolute path

[Stephan]

I faced similar problems when my configuration contained a value for open_basedir.
Since I set it to none everything is working fine.
But without any logfiles its hard to get into it.
Regards, Stephan

[till]

I need to test this - we might need to wrap the setting through ​realpath() but that is kind of expensive and I don't want to do this. Instead I'd like people to define absolute path.

This ticket still lacks examples, postponing. Apparently not as urgent.

[alec]

Two points:
1) ​http://php.net/manual/en/function.move-uploaded-file.php read a comment from "Darrell 18-May-2005 09:51". Looks like we should build absolute path on Windows.
2) we should add file_exists() check after move_uploaded_file() use.

[alec]

Fixed in [779cbe00].