devfs_read_link() and rootfs_read_link() could write beyond the buffer
size passed in (off by one).
The comment for _kern_read_link() didn't fit to what the function really
did.
common_read_link() no longer null terminates the link - it's the file
system's responsibility to do that.
fs_read_link() is not supposed to return the length of the link anymore,
but only B_OK for success.
Note, we deviate slightly from POSIX here, where even a buffer too small
would be filled, and no terminating null byte has to be written at all.
We always return an error in case the buffer is too small, and the link
is not partially copied into the buffer.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9652 a95241bf-73f2-0310-859d-f6bbb57e9c96
Axel Dörfler
6f5f688cde