handle - SFTP File Handle as returned by libssh2_sftp_open_ex(3)offset - Number of bytes from the beginning of file to seek to.
Move the file handle's internal pointer to an arbitrary location. libssh2 implements file pointers as a
localized concept to make file access appear more POSIX like. No packets are exchanged with the server
during a seek operation. The localized file pointer is used as a convenience offset during read/write
operations.
You MUST NOT seek during writing or reading a file with SFTP, as the internals use outstanding packets
and changing the "file position" during transit will results in badness.