Clipsync

Synchronize clipboards between multiple computers using files on a remote file system.

The clipboards are encrypted before written to files to enable use on remote file systems shared by multiple users. This ensures that the content of the clipboards, which may be passwords or other sensitive data, is kept secret. It also ensures that no other users tampers with the content of the clipboards.

USAGE: clipsync
Synchronize clipboards.

OPTIONS:
	-d <dir>   : synchronize using this directory
	-l <file>  : log output to this file
	-L <level> : log level (debug/info/notice/warning/error)
	-p <pw>    : password used to encrypt clipboard data
	-h         : print this help

It is also possible to use the environment variable 'SYNC_PASSWORD' to provide the encryption password to clipsync.

Disclaimer

I don't actually use this project anymore, but it was a useful way of syncing clipboards on air gapped systems with shared storage.

Installation

Clipsync depends on libsodium for encryption/decryption:

$ apt install libsodium-dev

Cmake is used, so compile and install like this:

$ mkdir build
$ cmake ..
$ make
$ make install

Remote File Systems

For clipsync to work, the remote file system must support atomic rename (man 2 rename). The reason for this is that rename is used to share the sync file between different instances of clipsync without locking.

The following remote file systems has been tested so far:

• NFS (works)
• CIFS version 3.0 (works) - could not get version 2.1 to work
• SSHFS (doesn't work) - not even with workaround=rename

Clipboard

Clipsync uses libclipboard (https://github.com/jtanx/libclipboard) for reading data from and writing data to the local clipboards.