author | Mikael Berthe <mikael@lilotux.net> |
Sat, 04 Feb 2023 12:58:35 +0100 | |
changeset 265 | 05c40b36d3b2 |
permissions | -rw-r--r-- |
265
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
1 |
//go:build linux |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
2 |
// +build linux |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
3 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
4 |
package fsnotify |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
5 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
6 |
import ( |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
7 |
"errors" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
8 |
"fmt" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
9 |
"io" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
10 |
"os" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
11 |
"path/filepath" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
12 |
"strings" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
13 |
"sync" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
14 |
"unsafe" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
15 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
16 |
"golang.org/x/sys/unix" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
17 |
) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
18 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
19 |
// Watcher watches a set of paths, delivering events on a channel. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
20 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
21 |
// A watcher should not be copied (e.g. pass it by pointer, rather than by |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
22 |
// value). |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
23 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
24 |
// # Linux notes |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
25 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
26 |
// When a file is removed a Remove event won't be emitted until all file |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
27 |
// descriptors are closed, and deletes will always emit a Chmod. For example: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
28 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
29 |
// fp := os.Open("file") |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
30 |
// os.Remove("file") // Triggers Chmod |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
31 |
// fp.Close() // Triggers Remove |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
32 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
33 |
// This is the event that inotify sends, so not much can be changed about this. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
34 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
35 |
// The fs.inotify.max_user_watches sysctl variable specifies the upper limit |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
36 |
// for the number of watches per user, and fs.inotify.max_user_instances |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
37 |
// specifies the maximum number of inotify instances per user. Every Watcher you |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
38 |
// create is an "instance", and every path you add is a "watch". |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
39 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
40 |
// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
41 |
// /proc/sys/fs/inotify/max_user_instances |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
42 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
43 |
// To increase them you can use sysctl or write the value to the /proc file: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
44 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
45 |
// # Default values on Linux 5.18 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
46 |
// sysctl fs.inotify.max_user_watches=124983 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
47 |
// sysctl fs.inotify.max_user_instances=128 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
48 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
49 |
// To make the changes persist on reboot edit /etc/sysctl.conf or |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
50 |
// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
51 |
// your distro's documentation): |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
52 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
53 |
// fs.inotify.max_user_watches=124983 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
54 |
// fs.inotify.max_user_instances=128 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
55 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
56 |
// Reaching the limit will result in a "no space left on device" or "too many open |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
57 |
// files" error. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
58 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
59 |
// # kqueue notes (macOS, BSD) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
60 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
61 |
// kqueue requires opening a file descriptor for every file that's being watched; |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
62 |
// so if you're watching a directory with five files then that's six file |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
63 |
// descriptors. You will run in to your system's "max open files" limit faster on |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
64 |
// these platforms. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
65 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
66 |
// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
67 |
// control the maximum number of open files, as well as /etc/login.conf on BSD |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
68 |
// systems. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
69 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
70 |
// # macOS notes |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
71 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
72 |
// Spotlight indexing on macOS can result in multiple events (see [#15]). A |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
73 |
// temporary workaround is to add your folder(s) to the "Spotlight Privacy |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
74 |
// Settings" until we have a native FSEvents implementation (see [#11]). |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
75 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
76 |
// [#11]: https://github.com/fsnotify/fsnotify/issues/11 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
77 |
// [#15]: https://github.com/fsnotify/fsnotify/issues/15 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
78 |
type Watcher struct { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
79 |
// Events sends the filesystem change events. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
80 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
81 |
// fsnotify can send the following events; a "path" here can refer to a |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
82 |
// file, directory, symbolic link, or special file like a FIFO. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
83 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
84 |
// fsnotify.Create A new path was created; this may be followed by one |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
85 |
// or more Write events if data also gets written to a |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
86 |
// file. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
87 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
88 |
// fsnotify.Remove A path was removed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
89 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
90 |
// fsnotify.Rename A path was renamed. A rename is always sent with the |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
91 |
// old path as Event.Name, and a Create event will be |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
92 |
// sent with the new name. Renames are only sent for |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
93 |
// paths that are currently watched; e.g. moving an |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
94 |
// unmonitored file into a monitored directory will |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
95 |
// show up as just a Create. Similarly, renaming a file |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
96 |
// to outside a monitored directory will show up as |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
97 |
// only a Rename. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
98 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
99 |
// fsnotify.Write A file or named pipe was written to. A Truncate will |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
100 |
// also trigger a Write. A single "write action" |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
101 |
// initiated by the user may show up as one or multiple |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
102 |
// writes, depending on when the system syncs things to |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
103 |
// disk. For example when compiling a large Go program |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
104 |
// you may get hundreds of Write events, so you |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
105 |
// probably want to wait until you've stopped receiving |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
106 |
// them (see the dedup example in cmd/fsnotify). |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
107 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
108 |
// fsnotify.Chmod Attributes were changed. On Linux this is also sent |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
109 |
// when a file is removed (or more accurately, when a |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
110 |
// link to an inode is removed). On kqueue it's sent |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
111 |
// and on kqueue when a file is truncated. On Windows |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
112 |
// it's never sent. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
113 |
Events chan Event |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
114 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
115 |
// Errors sends any errors. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
116 |
Errors chan error |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
117 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
118 |
// Store fd here as os.File.Read() will no longer return on close after |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
119 |
// calling Fd(). See: https://github.com/golang/go/issues/26439 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
120 |
fd int |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
121 |
mu sync.Mutex // Map access |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
122 |
inotifyFile *os.File |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
123 |
watches map[string]*watch // Map of inotify watches (key: path) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
124 |
paths map[int]string // Map of watched paths (key: watch descriptor) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
125 |
done chan struct{} // Channel for sending a "quit message" to the reader goroutine |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
126 |
doneResp chan struct{} // Channel to respond to Close |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
127 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
128 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
129 |
// NewWatcher creates a new Watcher. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
130 |
func NewWatcher() (*Watcher, error) { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
131 |
// Create inotify fd |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
132 |
// Need to set the FD to nonblocking mode in order for SetDeadline methods to work |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
133 |
// Otherwise, blocking i/o operations won't terminate on close |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
134 |
fd, errno := unix.InotifyInit1(unix.IN_CLOEXEC | unix.IN_NONBLOCK) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
135 |
if fd == -1 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
136 |
return nil, errno |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
137 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
138 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
139 |
w := &Watcher{ |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
140 |
fd: fd, |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
141 |
inotifyFile: os.NewFile(uintptr(fd), ""), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
142 |
watches: make(map[string]*watch), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
143 |
paths: make(map[int]string), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
144 |
Events: make(chan Event), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
145 |
Errors: make(chan error), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
146 |
done: make(chan struct{}), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
147 |
doneResp: make(chan struct{}), |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
148 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
149 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
150 |
go w.readEvents() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
151 |
return w, nil |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
152 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
153 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
154 |
// Returns true if the event was sent, or false if watcher is closed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
155 |
func (w *Watcher) sendEvent(e Event) bool { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
156 |
select { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
157 |
case w.Events <- e: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
158 |
return true |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
159 |
case <-w.done: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
160 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
161 |
return false |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
162 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
163 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
164 |
// Returns true if the error was sent, or false if watcher is closed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
165 |
func (w *Watcher) sendError(err error) bool { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
166 |
select { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
167 |
case w.Errors <- err: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
168 |
return true |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
169 |
case <-w.done: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
170 |
return false |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
171 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
172 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
173 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
174 |
func (w *Watcher) isClosed() bool { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
175 |
select { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
176 |
case <-w.done: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
177 |
return true |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
178 |
default: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
179 |
return false |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
180 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
181 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
182 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
183 |
// Close removes all watches and closes the events channel. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
184 |
func (w *Watcher) Close() error { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
185 |
w.mu.Lock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
186 |
if w.isClosed() { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
187 |
w.mu.Unlock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
188 |
return nil |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
189 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
190 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
191 |
// Send 'close' signal to goroutine, and set the Watcher to closed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
192 |
close(w.done) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
193 |
w.mu.Unlock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
194 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
195 |
// Causes any blocking reads to return with an error, provided the file |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
196 |
// still supports deadline operations. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
197 |
err := w.inotifyFile.Close() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
198 |
if err != nil { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
199 |
return err |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
200 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
201 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
202 |
// Wait for goroutine to close |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
203 |
<-w.doneResp |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
204 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
205 |
return nil |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
206 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
207 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
208 |
// Add starts monitoring the path for changes. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
209 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
210 |
// A path can only be watched once; attempting to watch it more than once will |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
211 |
// return an error. Paths that do not yet exist on the filesystem cannot be |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
212 |
// added. A watch will be automatically removed if the path is deleted. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
213 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
214 |
// A path will remain watched if it gets renamed to somewhere else on the same |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
215 |
// filesystem, but the monitor will get removed if the path gets deleted and |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
216 |
// re-created, or if it's moved to a different filesystem. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
217 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
218 |
// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
219 |
// filesystems (/proc, /sys, etc.) generally don't work. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
220 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
221 |
// # Watching directories |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
222 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
223 |
// All files in a directory are monitored, including new files that are created |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
224 |
// after the watcher is started. Subdirectories are not watched (i.e. it's |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
225 |
// non-recursive). |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
226 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
227 |
// # Watching files |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
228 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
229 |
// Watching individual files (rather than directories) is generally not |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
230 |
// recommended as many tools update files atomically. Instead of "just" writing |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
231 |
// to the file a temporary file will be written to first, and if successful the |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
232 |
// temporary file is moved to to destination removing the original, or some |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
233 |
// variant thereof. The watcher on the original file is now lost, as it no |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
234 |
// longer exists. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
235 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
236 |
// Instead, watch the parent directory and use Event.Name to filter out files |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
237 |
// you're not interested in. There is an example of this in [cmd/fsnotify/file.go]. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
238 |
func (w *Watcher) Add(name string) error { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
239 |
name = filepath.Clean(name) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
240 |
if w.isClosed() { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
241 |
return errors.New("inotify instance already closed") |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
242 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
243 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
244 |
var flags uint32 = unix.IN_MOVED_TO | unix.IN_MOVED_FROM | |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
245 |
unix.IN_CREATE | unix.IN_ATTRIB | unix.IN_MODIFY | |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
246 |
unix.IN_MOVE_SELF | unix.IN_DELETE | unix.IN_DELETE_SELF |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
247 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
248 |
w.mu.Lock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
249 |
defer w.mu.Unlock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
250 |
watchEntry := w.watches[name] |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
251 |
if watchEntry != nil { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
252 |
flags |= watchEntry.flags | unix.IN_MASK_ADD |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
253 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
254 |
wd, errno := unix.InotifyAddWatch(w.fd, name, flags) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
255 |
if wd == -1 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
256 |
return errno |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
257 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
258 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
259 |
if watchEntry == nil { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
260 |
w.watches[name] = &watch{wd: uint32(wd), flags: flags} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
261 |
w.paths[wd] = name |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
262 |
} else { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
263 |
watchEntry.wd = uint32(wd) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
264 |
watchEntry.flags = flags |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
265 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
266 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
267 |
return nil |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
268 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
269 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
270 |
// Remove stops monitoring the path for changes. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
271 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
272 |
// Directories are always removed non-recursively. For example, if you added |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
273 |
// /tmp/dir and /tmp/dir/subdir then you will need to remove both. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
274 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
275 |
// Removing a path that has not yet been added returns [ErrNonExistentWatch]. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
276 |
func (w *Watcher) Remove(name string) error { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
277 |
name = filepath.Clean(name) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
278 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
279 |
// Fetch the watch. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
280 |
w.mu.Lock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
281 |
defer w.mu.Unlock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
282 |
watch, ok := w.watches[name] |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
283 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
284 |
// Remove it from inotify. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
285 |
if !ok { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
286 |
return fmt.Errorf("%w: %s", ErrNonExistentWatch, name) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
287 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
288 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
289 |
// We successfully removed the watch if InotifyRmWatch doesn't return an |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
290 |
// error, we need to clean up our internal state to ensure it matches |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
291 |
// inotify's kernel state. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
292 |
delete(w.paths, int(watch.wd)) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
293 |
delete(w.watches, name) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
294 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
295 |
// inotify_rm_watch will return EINVAL if the file has been deleted; |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
296 |
// the inotify will already have been removed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
297 |
// watches and pathes are deleted in ignoreLinux() implicitly and asynchronously |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
298 |
// by calling inotify_rm_watch() below. e.g. readEvents() goroutine receives IN_IGNORE |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
299 |
// so that EINVAL means that the wd is being rm_watch()ed or its file removed |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
300 |
// by another thread and we have not received IN_IGNORE event. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
301 |
success, errno := unix.InotifyRmWatch(w.fd, watch.wd) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
302 |
if success == -1 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
303 |
// TODO: Perhaps it's not helpful to return an error here in every case; |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
304 |
// The only two possible errors are: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
305 |
// |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
306 |
// - EBADF, which happens when w.fd is not a valid file descriptor |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
307 |
// of any kind. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
308 |
// - EINVAL, which is when fd is not an inotify descriptor or wd |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
309 |
// is not a valid watch descriptor. Watch descriptors are |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
310 |
// invalidated when they are removed explicitly or implicitly; |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
311 |
// explicitly by inotify_rm_watch, implicitly when the file they |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
312 |
// are watching is deleted. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
313 |
return errno |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
314 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
315 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
316 |
return nil |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
317 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
318 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
319 |
// WatchList returns all paths added with [Add] (and are not yet removed). |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
320 |
func (w *Watcher) WatchList() []string { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
321 |
w.mu.Lock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
322 |
defer w.mu.Unlock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
323 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
324 |
entries := make([]string, 0, len(w.watches)) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
325 |
for pathname := range w.watches { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
326 |
entries = append(entries, pathname) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
327 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
328 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
329 |
return entries |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
330 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
331 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
332 |
type watch struct { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
333 |
wd uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
334 |
flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
335 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
336 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
337 |
// readEvents reads from the inotify file descriptor, converts the |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
338 |
// received events into Event objects and sends them via the Events channel |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
339 |
func (w *Watcher) readEvents() { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
340 |
defer func() { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
341 |
close(w.doneResp) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
342 |
close(w.Errors) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
343 |
close(w.Events) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
344 |
}() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
345 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
346 |
var ( |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
347 |
buf [unix.SizeofInotifyEvent * 4096]byte // Buffer for a maximum of 4096 raw events |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
348 |
errno error // Syscall errno |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
349 |
) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
350 |
for { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
351 |
// See if we have been closed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
352 |
if w.isClosed() { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
353 |
return |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
354 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
355 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
356 |
n, err := w.inotifyFile.Read(buf[:]) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
357 |
switch { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
358 |
case errors.Unwrap(err) == os.ErrClosed: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
359 |
return |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
360 |
case err != nil: |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
361 |
if !w.sendError(err) { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
362 |
return |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
363 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
364 |
continue |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
365 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
366 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
367 |
if n < unix.SizeofInotifyEvent { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
368 |
var err error |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
369 |
if n == 0 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
370 |
// If EOF is received. This should really never happen. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
371 |
err = io.EOF |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
372 |
} else if n < 0 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
373 |
// If an error occurred while reading. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
374 |
err = errno |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
375 |
} else { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
376 |
// Read was too short. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
377 |
err = errors.New("notify: short read in readEvents()") |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
378 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
379 |
if !w.sendError(err) { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
380 |
return |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
381 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
382 |
continue |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
383 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
384 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
385 |
var offset uint32 |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
386 |
// We don't know how many events we just read into the buffer |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
387 |
// While the offset points to at least one whole event... |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
388 |
for offset <= uint32(n-unix.SizeofInotifyEvent) { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
389 |
var ( |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
390 |
// Point "raw" to the event in the buffer |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
391 |
raw = (*unix.InotifyEvent)(unsafe.Pointer(&buf[offset])) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
392 |
mask = uint32(raw.Mask) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
393 |
nameLen = uint32(raw.Len) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
394 |
) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
395 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
396 |
if mask&unix.IN_Q_OVERFLOW != 0 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
397 |
if !w.sendError(ErrEventOverflow) { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
398 |
return |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
399 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
400 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
401 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
402 |
// If the event happened to the watched directory or the watched file, the kernel |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
403 |
// doesn't append the filename to the event, but we would like to always fill the |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
404 |
// the "Name" field with a valid filename. We retrieve the path of the watch from |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
405 |
// the "paths" map. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
406 |
w.mu.Lock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
407 |
name, ok := w.paths[int(raw.Wd)] |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
408 |
// IN_DELETE_SELF occurs when the file/directory being watched is removed. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
409 |
// This is a sign to clean up the maps, otherwise we are no longer in sync |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
410 |
// with the inotify kernel state which has already deleted the watch |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
411 |
// automatically. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
412 |
if ok && mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
413 |
delete(w.paths, int(raw.Wd)) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
414 |
delete(w.watches, name) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
415 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
416 |
w.mu.Unlock() |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
417 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
418 |
if nameLen > 0 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
419 |
// Point "bytes" at the first byte of the filename |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
420 |
bytes := (*[unix.PathMax]byte)(unsafe.Pointer(&buf[offset+unix.SizeofInotifyEvent]))[:nameLen:nameLen] |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
421 |
// The filename is padded with NULL bytes. TrimRight() gets rid of those. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
422 |
name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000") |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
423 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
424 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
425 |
event := w.newEvent(name, mask) |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
426 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
427 |
// Send the events that are not ignored on the events channel |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
428 |
if mask&unix.IN_IGNORED == 0 { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
429 |
if !w.sendEvent(event) { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
430 |
return |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
431 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
432 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
433 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
434 |
// Move to the next event in the buffer |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
435 |
offset += unix.SizeofInotifyEvent + nameLen |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
436 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
437 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
438 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
439 |
|
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
440 |
// newEvent returns an platform-independent Event based on an inotify mask. |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
441 |
func (w *Watcher) newEvent(name string, mask uint32) Event { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
442 |
e := Event{Name: name} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
443 |
if mask&unix.IN_CREATE == unix.IN_CREATE || mask&unix.IN_MOVED_TO == unix.IN_MOVED_TO { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
444 |
e.Op |= Create |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
445 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
446 |
if mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF || mask&unix.IN_DELETE == unix.IN_DELETE { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
447 |
e.Op |= Remove |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
448 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
449 |
if mask&unix.IN_MODIFY == unix.IN_MODIFY { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
450 |
e.Op |= Write |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
451 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
452 |
if mask&unix.IN_MOVE_SELF == unix.IN_MOVE_SELF || mask&unix.IN_MOVED_FROM == unix.IN_MOVED_FROM { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
453 |
e.Op |= Rename |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
454 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
455 |
if mask&unix.IN_ATTRIB == unix.IN_ATTRIB { |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
456 |
e.Op |= Chmod |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
457 |
} |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
458 |
return e |
05c40b36d3b2
Bump to version 3.0.0-dev, using madon v3
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
459 |
} |