diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/fs.md | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -219,8 +219,11 @@ whether the pane has the keyboard. It takes the pane's builtins (below), carries, and acme's `lock` and `unlock` (editors/acme/xfid.c:603-611), for an edit of several writes to `addr` and `data` that another client must not land in the middle of. As in acme the lock binds only the clients that take -it: a `lock` while another open holds it waits until that open writes -`unlock` or closes (or the pane does), and nothing else is refused for it -- +it: a `lock` while another open holds it fails at once with `file in use` +(EBUSY), to be tried again, until that open writes `unlock` or closes (or +the pane does) -- where acme's blocks, because through a kernel or FUSE +mount a blocked write would hold up the holder's own `unlock` and close on +that file -- and nothing else is refused for it -- not a write to any other file, not the person at the keyboard. It belongs to the open that wrote it, so only that open's `unlock` is taken; a write on an open that cannot write (or the editor's own, on none) cannot lock. From a |