inotify: Avoid most of the race conditions, get rid of Cint

There's still a condition that could be a race with fd-reuse, if one
goroutine is calling inotify.{AddWatch,RmWatch,Read}(); another
goroutine is calling inotify.Close(), and several things happen between
loadFd() running and the add_watch/rm_watch/read syscall launching:
 - syscall.Close() returns
 - syscall.Open() reuses the filedescriptor

           A                                  B
    syscall(loadFd())         inotify.Close(); syscall.Open()
    ----------------------------------------------------------
           loadFd()
                                     syscall.Close()
                                     syscall.Open()
           syscall()

Given that Read() can't be allowed to block Close() from running, I'm not
sure there's a way to fix this.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/nshd/hackers_git/hackers.go b/src/nshd/hackers_git/hackers.go
index 0f2dd3d..ca3974d 100644
--- a/src/nshd/hackers_git/hackers.go
+++ b/src/nshd/hackers_git/hackers.go
@@ -28,10 +28,10 @@ type Hackers struct {
 	users     map[int32]user
 
 	in_fd      *inotify.Inotify
-	in_wd_home inotify.Cint
-	in_wd_yaml inotify.Cint
-	in_uid2wd  map[int32]inotify.Cint
-	in_wd2uid  map[inotify.Cint]int32
+	in_wd_home inotify.Wd
+	in_wd_yaml inotify.Wd
+	in_uid2wd  map[int32]inotify.Wd
+	in_wd2uid  map[inotify.Wd]int32
 }
 
 var _ nslcd_systemd.Backend = &Hackers{}