race condition when creating deeper subdirectories

[j0ki]

When creating a directory tree inside a watched directory it is possible that a deeper subdirectory ends up not being watched, because its parent did not get watched before it was created.
Example:

1. Watch rootdir
2. create rootdir/subdir
3. create rootdir/subdir/subsubdir
4. inotify event -> watch rootdir/subdir
5. no event for creating subsubdir -> subsubdir is not watched

See https://mail.gnome.org/archives/dashboard-hackers/2004-October/msg00022.html

[mecking]

Hi @j0ki :)
I did some tests:

Console:
[ec2-user@sandbox watch]$ pwd
/tmp/watch
[ec2-user@sandbox watch]$ mkdir -p 1/2/3

Logs:
[Watcher] Home directory: /tmp/watch
[add_Watch] Add new watch for /tmp/watch
[inotify_Callback] Directory for watch: /tmp/watch/1
[add_Watch] Add new watch for /tmp/watch/1
[inotify_Callback] Directory for watch: /tmp/watch/1/2
[add_Watch] Add new watch for /tmp/watch/1/2
[inotify_Callback] Directory for watch: /tmp/watch/1/2/3
[add_Watch] Add new watch for /tmp/watch/1/2/3

More tests:
Console:
[ec2-user@sandbox watch]$ mkdir -p 1/2/3/4/5/6

Logs:
[inotify_Callback] Directory for watch: /tmp/watch/1/2/3/4
[add_Watch] Add new watch for /tmp/watch/1/2/3/4
[inotify_Callback] Directory for watch: /tmp/watch/1/2/3/4/5
[add_Watch] Add new watch for /tmp/watch/1/2/3/4/5
[inotify_Callback] Directory for watch: /tmp/watch/1/2/3/4/5/6
[add_Watch] Add new watch for /tmp/watch/1/2/3/4/5/6

[j0ki]

Hey @mecking !
When i run the exact same command I get a watch for the first directory, but not for any of the decsendants.

Console:
joki@joki-laptop-debian:/tmp/watch$ mkdir -p 1/2/3/4/5/6

Log:
[inotify_Callback] Directory for watch: /tmp/watch/1
[add_Watch] Add new watch for /tmp/watch/1

I also tried:
Console:
joki@joki-laptop-debian:/tmp/watch$ mkdir -p /tmp/no_watch/a/b/c/d/e/f
joki@joki-laptop-debian:/tmp/watch$ mv /tmp/no_watch/a /tmp/watch

this does not create any watch. it seems like it triggers an inotify event that is not supported.