Mercurial > hg
annotate hgext/inotify/server.py @ 8610:8ef1f63e554c
inotify: server: use a common 'pollable' interface for server & repowatcher
Mainly for documentation purposes: it easily explains the role of handle_event
and handle_timeout, and why both server & repowatcher implement those methods.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
---|---|
date | Thu, 21 May 2009 17:09:12 +0900 |
parents | aeaa0bd9dc24 |
children | 55af9be4efac |
rev | line source |
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6239 | 1 # server.py - inotify status server |
2 # | |
3 # Copyright 2006, 2007, 2008 Bryan O'Sullivan <bos@serpentine.com> | |
4 # Copyright 2007, 2008 Brendan Cully <brendan@kublai.com> | |
5 # | |
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6 # This software may be used and distributed according to the terms of the |
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7 # GNU General Public License version 2, incorporated herein by reference. |
6239 | 8 |
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9 from mercurial.i18n import _ |
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10 from mercurial import osutil, util |
6239 | 11 import common |
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12 import errno, os, select, socket, stat, struct, sys, tempfile, time |
6239 | 13 |
14 try: | |
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15 import linux as inotify |
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16 from linux import watcher |
6239 | 17 except ImportError: |
18 raise | |
19 | |
20 class AlreadyStartedException(Exception): pass | |
21 | |
22 def join(a, b): | |
23 if a: | |
24 if a[-1] == '/': | |
25 return a + b | |
26 return a + '/' + b | |
27 return b | |
28 | |
29 walk_ignored_errors = (errno.ENOENT, errno.ENAMETOOLONG) | |
30 | |
31 def walkrepodirs(repo): | |
32 '''Iterate over all subdirectories of this repo. | |
33 Exclude the .hg directory, any nested repos, and ignored dirs.''' | |
34 rootslash = repo.root + os.sep | |
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35 |
6239 | 36 def walkit(dirname, top): |
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37 fullpath = rootslash + dirname |
6239 | 38 try: |
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39 for name, kind in osutil.listdir(fullpath): |
6239 | 40 if kind == stat.S_IFDIR: |
41 if name == '.hg': | |
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42 if not top: |
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43 return |
6239 | 44 else: |
45 d = join(dirname, name) | |
46 if repo.dirstate._ignore(d): | |
47 continue | |
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48 for subdir in walkit(d, False): |
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49 yield subdir |
6239 | 50 except OSError, err: |
51 if err.errno not in walk_ignored_errors: | |
52 raise | |
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53 yield fullpath |
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54 |
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55 return walkit('', True) |
6239 | 56 |
57 def walk(repo, root): | |
58 '''Like os.walk, but only yields regular files.''' | |
59 | |
60 # This function is critical to performance during startup. | |
61 | |
62 rootslash = repo.root + os.sep | |
63 | |
64 def walkit(root, reporoot): | |
65 files, dirs = [], [] | |
66 | |
67 try: | |
68 fullpath = rootslash + root | |
69 for name, kind in osutil.listdir(fullpath): | |
70 if kind == stat.S_IFDIR: | |
71 if name == '.hg': | |
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72 if not reporoot: |
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73 return |
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74 else: |
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75 dirs.append(name) |
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76 path = join(root, name) |
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77 if repo.dirstate._ignore(path): |
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78 continue |
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79 for result in walkit(path, False): |
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80 yield result |
6239 | 81 elif kind in (stat.S_IFREG, stat.S_IFLNK): |
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82 files.append(name) |
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83 yield fullpath, dirs, files |
6239 | 84 |
85 except OSError, err: | |
86 if err.errno not in walk_ignored_errors: | |
87 raise | |
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88 |
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89 return walkit(root, root == '') |
6239 | 90 |
91 def _explain_watch_limit(ui, repo, count): | |
92 path = '/proc/sys/fs/inotify/max_user_watches' | |
93 try: | |
94 limit = int(file(path).read()) | |
95 except IOError, err: | |
96 if err.errno != errno.ENOENT: | |
97 raise | |
98 raise util.Abort(_('this system does not seem to ' | |
99 'support inotify')) | |
100 ui.warn(_('*** the current per-user limit on the number ' | |
101 'of inotify watches is %s\n') % limit) | |
102 ui.warn(_('*** this limit is too low to watch every ' | |
103 'directory in this repository\n')) | |
104 ui.warn(_('*** counting directories: ')) | |
105 ndirs = len(list(walkrepodirs(repo))) | |
106 ui.warn(_('found %d\n') % ndirs) | |
107 newlimit = min(limit, 1024) | |
108 while newlimit < ((limit + ndirs) * 1.1): | |
109 newlimit *= 2 | |
110 ui.warn(_('*** to raise the limit from %d to %d (run as root):\n') % | |
111 (limit, newlimit)) | |
112 ui.warn(_('*** echo %d > %s\n') % (newlimit, path)) | |
113 raise util.Abort(_('cannot watch %s until inotify watch limit is raised') | |
114 % repo.root) | |
115 | |
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116 class pollable(object): |
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117 """ |
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118 Interface to support polling. |
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119 The file descriptor returned by fileno() is registered to a polling |
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120 object. |
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121 Usage: |
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122 Every tick, check if an event has happened since the last tick: |
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123 * If yes, call handle_events |
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124 * If no, call handle_timeout |
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125 """ |
6239 | 126 poll_events = select.POLLIN |
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127 def fileno(self): |
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128 raise NotImplementedError |
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129 |
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130 def handle_events(self, events): |
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131 raise NotImplementedError |
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132 |
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133 def handle_timeout(self): |
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134 raise NotImplementedError |
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135 |
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136 def shutdown(self): |
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137 raise NotImplementedError |
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138 |
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139 class repowatcher(pollable): |
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140 """ |
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141 Watches inotify events |
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142 """ |
6239 | 143 statuskeys = 'almr!?' |
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144 mask = ( |
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145 inotify.IN_ATTRIB | |
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146 inotify.IN_CREATE | |
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147 inotify.IN_DELETE | |
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148 inotify.IN_DELETE_SELF | |
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149 inotify.IN_MODIFY | |
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150 inotify.IN_MOVED_FROM | |
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151 inotify.IN_MOVED_TO | |
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152 inotify.IN_MOVE_SELF | |
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153 inotify.IN_ONLYDIR | |
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154 inotify.IN_UNMOUNT | |
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155 0) |
6239 | 156 |
157 def __init__(self, ui, repo, master): | |
158 self.ui = ui | |
159 self.repo = repo | |
160 self.wprefix = self.repo.wjoin('') | |
161 self.timeout = None | |
162 self.master = master | |
163 try: | |
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164 self.watcher = watcher.watcher() |
6239 | 165 except OSError, err: |
166 raise util.Abort(_('inotify service not available: %s') % | |
167 err.strerror) | |
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168 self.threshold = watcher.threshold(self.watcher) |
6239 | 169 self.registered = True |
170 self.fileno = self.watcher.fileno | |
171 | |
172 self.tree = {} | |
173 self.statcache = {} | |
174 self.statustrees = dict([(s, {}) for s in self.statuskeys]) | |
175 | |
176 self.watches = 0 | |
177 self.last_event = None | |
178 | |
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179 self.lastevent = {} |
6239 | 180 |
181 self.ds_info = self.dirstate_info() | |
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182 self.handle_timeout() |
6239 | 183 self.scan() |
184 | |
185 def event_time(self): | |
186 last = self.last_event | |
187 now = time.time() | |
188 self.last_event = now | |
189 | |
190 if last is None: | |
191 return 'start' | |
192 delta = now - last | |
193 if delta < 5: | |
194 return '+%.3f' % delta | |
195 if delta < 50: | |
196 return '+%.2f' % delta | |
197 return '+%.1f' % delta | |
198 | |
199 def dirstate_info(self): | |
200 try: | |
201 st = os.lstat(self.repo.join('dirstate')) | |
202 return st.st_mtime, st.st_ino | |
203 except OSError, err: | |
204 if err.errno != errno.ENOENT: | |
205 raise | |
206 return 0, 0 | |
207 | |
208 def add_watch(self, path, mask): | |
209 if not path: | |
210 return | |
211 if self.watcher.path(path) is None: | |
212 if self.ui.debugflag: | |
213 self.ui.note(_('watching %r\n') % path[len(self.wprefix):]) | |
214 try: | |
215 self.watcher.add(path, mask) | |
216 self.watches += 1 | |
217 except OSError, err: | |
218 if err.errno in (errno.ENOENT, errno.ENOTDIR): | |
219 return | |
220 if err.errno != errno.ENOSPC: | |
221 raise | |
222 _explain_watch_limit(self.ui, self.repo, self.watches) | |
223 | |
224 def setup(self): | |
225 self.ui.note(_('watching directories under %r\n') % self.repo.root) | |
226 self.add_watch(self.repo.path, inotify.IN_DELETE) | |
227 self.check_dirstate() | |
228 | |
229 def wpath(self, evt): | |
230 path = evt.fullpath | |
231 if path == self.repo.root: | |
232 return '' | |
233 if path.startswith(self.wprefix): | |
234 return path[len(self.wprefix):] | |
235 raise 'wtf? ' + path | |
236 | |
237 def dir(self, tree, path): | |
238 if path: | |
239 for name in path.split('/'): | |
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240 tree = tree.setdefault(name, {}) |
6239 | 241 return tree |
242 | |
243 def lookup(self, path, tree): | |
244 if path: | |
245 try: | |
246 for name in path.split('/'): | |
247 tree = tree[name] | |
248 except KeyError: | |
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249 return 'x' |
6239 | 250 except TypeError: |
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251 return 'd' |
6239 | 252 return tree |
253 | |
254 def split(self, path): | |
255 c = path.rfind('/') | |
256 if c == -1: | |
257 return '', path | |
258 return path[:c], path[c+1:] | |
259 | |
260 def filestatus(self, fn, st): | |
261 try: | |
262 type_, mode, size, time = self.repo.dirstate._map[fn][:4] | |
263 except KeyError: | |
264 type_ = '?' | |
265 if type_ == 'n': | |
266 st_mode, st_size, st_mtime = st | |
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267 if size == -1: |
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268 return 'l' |
6239 | 269 if size and (size != st_size or (mode ^ st_mode) & 0100): |
270 return 'm' | |
271 if time != int(st_mtime): | |
272 return 'l' | |
273 return 'n' | |
274 if type_ == '?' and self.repo.dirstate._ignore(fn): | |
275 return 'i' | |
276 return type_ | |
277 | |
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278 def updatefile(self, wfn, osstat): |
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279 ''' |
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280 update the file entry of an existing file. |
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281 |
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282 osstat: (mode, size, time) tuple, as returned by os.lstat(wfn) |
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283 ''' |
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284 |
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285 self._updatestatus(wfn, self.filestatus(wfn, osstat)) |
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286 |
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287 def deletefile(self, wfn, oldstatus): |
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288 ''' |
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289 update the entry of a file which has been deleted. |
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290 |
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291 oldstatus: char in statuskeys, status of the file before deletion |
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292 ''' |
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293 if oldstatus == 'r': |
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294 newstatus = 'r' |
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295 elif oldstatus in 'almn': |
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296 newstatus = '!' |
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297 else: |
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298 newstatus = None |
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299 |
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300 self.statcache.pop(wfn, None) |
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301 self._updatestatus(wfn, newstatus) |
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302 |
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303 def _updatestatus(self, wfn, newstatus): |
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304 ''' |
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305 Update the stored status of a file or directory. |
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306 |
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307 newstatus: - char in (statuskeys + 'ni'), new status to apply. |
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308 - or None, to stop tracking wfn |
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309 ''' |
6239 | 310 root, fn = self.split(wfn) |
311 d = self.dir(self.tree, root) | |
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312 |
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313 oldstatus = d.get(fn) |
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314 # oldstatus can be either: |
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315 # - None : fn is new |
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316 # - a char in statuskeys: fn is a (tracked) file |
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317 # - a dict: fn is a directory |
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318 isdir = isinstance(oldstatus, dict) |
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319 |
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320 if self.ui.debugflag and oldstatus != newstatus: |
6239 | 321 if isdir: |
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322 self.ui.note(_('status: %r dir(%d) -> %s\n') % |
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323 (wfn, len(oldstatus), newstatus)) |
6239 | 324 else: |
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325 self.ui.note(_('status: %r %s -> %s\n') % |
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326 (wfn, oldstatus, newstatus)) |
6239 | 327 if not isdir: |
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328 if oldstatus and oldstatus in self.statuskeys \ |
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329 and oldstatus != newstatus: |
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330 del self.dir(self.statustrees[oldstatus], root)[fn] |
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331 if newstatus and newstatus != 'i': |
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332 d[fn] = newstatus |
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333 if newstatus in self.statuskeys: |
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334 dd = self.dir(self.statustrees[newstatus], root) |
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335 if oldstatus != newstatus or fn not in dd: |
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336 dd[fn] = newstatus |
6239 | 337 else: |
338 d.pop(fn, None) | |
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339 |
6239 | 340 |
341 def check_deleted(self, key): | |
342 # Files that had been deleted but were present in the dirstate | |
343 # may have vanished from the dirstate; we must clean them up. | |
344 nuke = [] | |
345 for wfn, ignore in self.walk(key, self.statustrees[key]): | |
346 if wfn not in self.repo.dirstate: | |
347 nuke.append(wfn) | |
348 for wfn in nuke: | |
349 root, fn = self.split(wfn) | |
350 del self.dir(self.statustrees[key], root)[fn] | |
351 del self.dir(self.tree, root)[fn] | |
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352 |
6239 | 353 def scan(self, topdir=''): |
354 ds = self.repo.dirstate._map.copy() | |
355 self.add_watch(join(self.repo.root, topdir), self.mask) | |
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356 for root, dirs, files in walk(self.repo, topdir): |
6239 | 357 for d in dirs: |
358 self.add_watch(join(root, d), self.mask) | |
359 wroot = root[len(self.wprefix):] | |
360 d = self.dir(self.tree, wroot) | |
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361 for fn in files: |
6239 | 362 wfn = join(wroot, fn) |
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363 self.updatefile(wfn, self.getstat(wfn)) |
6239 | 364 ds.pop(wfn, None) |
365 wtopdir = topdir | |
366 if wtopdir and wtopdir[-1] != '/': | |
367 wtopdir += '/' | |
368 for wfn, state in ds.iteritems(): | |
369 if not wfn.startswith(wtopdir): | |
370 continue | |
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371 try: |
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372 st = self.stat(wfn) |
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373 except OSError: |
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374 status = state[0] |
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375 self.deletefile(wfn, status) |
6239 | 376 else: |
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377 self.updatefile(wfn, st) |
6239 | 378 self.check_deleted('!') |
379 self.check_deleted('r') | |
380 | |
381 def check_dirstate(self): | |
382 ds_info = self.dirstate_info() | |
383 if ds_info == self.ds_info: | |
384 return | |
385 self.ds_info = ds_info | |
386 if not self.ui.debugflag: | |
387 self.last_event = None | |
388 self.ui.note(_('%s dirstate reload\n') % self.event_time()) | |
389 self.repo.dirstate.invalidate() | |
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390 self.handle_timeout() |
6239 | 391 self.scan() |
392 self.ui.note(_('%s end dirstate reload\n') % self.event_time()) | |
393 | |
394 def walk(self, states, tree, prefix=''): | |
395 # This is the "inner loop" when talking to the client. | |
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396 |
6239 | 397 for name, val in tree.iteritems(): |
398 path = join(prefix, name) | |
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399 try: |
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400 if val in states: |
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401 yield path, val |
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402 except TypeError: |
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403 for p in self.walk(states, val, path): |
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404 yield p |
6239 | 405 |
406 def update_hgignore(self): | |
407 # An update of the ignore file can potentially change the | |
408 # states of all unknown and ignored files. | |
409 | |
410 # XXX If the user has other ignore files outside the repo, or | |
411 # changes their list of ignore files at run time, we'll | |
412 # potentially never see changes to them. We could get the | |
413 # client to report to us what ignore data they're using. | |
414 # But it's easier to do nothing than to open that can of | |
415 # worms. | |
416 | |
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417 if '_ignore' in self.repo.dirstate.__dict__: |
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418 delattr(self.repo.dirstate, '_ignore') |
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419 self.ui.note(_('rescanning due to .hgignore change\n')) |
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420 self.handle_timeout() |
6239 | 421 self.scan() |
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422 |
6239 | 423 def getstat(self, wpath): |
424 try: | |
425 return self.statcache[wpath] | |
426 except KeyError: | |
427 try: | |
428 return self.stat(wpath) | |
429 except OSError, err: | |
430 if err.errno != errno.ENOENT: | |
431 raise | |
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432 |
6239 | 433 def stat(self, wpath): |
434 try: | |
435 st = os.lstat(join(self.wprefix, wpath)) | |
436 ret = st.st_mode, st.st_size, st.st_mtime | |
437 self.statcache[wpath] = ret | |
438 return ret | |
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439 except OSError: |
6239 | 440 self.statcache.pop(wpath, None) |
441 raise | |
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442 |
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443 def eventaction(code): |
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inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
444 def decorator(f): |
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inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
445 def wrapper(self, wpath): |
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inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
446 if code == 'm' and wpath in self.lastevent and \ |
1c5752dabf76
inotify: use a decorator instead of dispatching calls
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8605
diff
changeset
|
447 self.lastevent[wpath] in 'cm': |
1c5752dabf76
inotify: use a decorator instead of dispatching calls
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8605
diff
changeset
|
448 return |
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inotify: use a decorator instead of dispatching calls
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parents:
8605
diff
changeset
|
449 self.lastevent[wpath] = code |
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inotify: use a decorator instead of dispatching calls
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8605
diff
changeset
|
450 self.timeout = 250 |
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inotify: use a decorator instead of dispatching calls
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8605
diff
changeset
|
451 |
1c5752dabf76
inotify: use a decorator instead of dispatching calls
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parents:
8605
diff
changeset
|
452 f(self, wpath) |
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parents:
8605
diff
changeset
|
453 |
1c5752dabf76
inotify: use a decorator instead of dispatching calls
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parents:
8605
diff
changeset
|
454 wrapper.func_name = f.func_name |
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inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
455 return wrapper |
1c5752dabf76
inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
456 return decorator |
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inotify: use a decorator instead of dispatching calls
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8605
diff
changeset
|
457 |
1c5752dabf76
inotify: use a decorator instead of dispatching calls
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8605
diff
changeset
|
458 @eventaction('c') |
6239 | 459 def created(self, wpath): |
460 if wpath == '.hgignore': | |
461 self.update_hgignore() | |
462 try: | |
463 st = self.stat(wpath) | |
464 if stat.S_ISREG(st[0]): | |
8599
1f706b1b62f3
inotify: server: refactor updatestatus()
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8557
diff
changeset
|
465 self.updatefile(wpath, st) |
7280
810ca383da9c
remove unused variables
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7220
diff
changeset
|
466 except OSError: |
6239 | 467 pass |
468 | |
8606
1c5752dabf76
inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
469 @eventaction('m') |
6239 | 470 def modified(self, wpath): |
471 if wpath == '.hgignore': | |
472 self.update_hgignore() | |
473 try: | |
474 st = self.stat(wpath) | |
475 if stat.S_ISREG(st[0]): | |
476 if self.repo.dirstate[wpath] in 'lmn': | |
8599
1f706b1b62f3
inotify: server: refactor updatestatus()
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8557
diff
changeset
|
477 self.updatefile(wpath, st) |
6239 | 478 except OSError: |
479 pass | |
480 | |
8606
1c5752dabf76
inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
481 @eventaction('d') |
6239 | 482 def deleted(self, wpath): |
483 if wpath == '.hgignore': | |
484 self.update_hgignore() | |
485 elif wpath.startswith('.hg/'): | |
486 if wpath == '.hg/wlock': | |
487 self.check_dirstate() | |
488 return | |
489 | |
8599
1f706b1b62f3
inotify: server: refactor updatestatus()
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8557
diff
changeset
|
490 self.deletefile(wpath, self.repo.dirstate[wpath]) |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
491 |
6239 | 492 def process_create(self, wpath, evt): |
493 if self.ui.debugflag: | |
494 self.ui.note(_('%s event: created %s\n') % | |
495 (self.event_time(), wpath)) | |
496 | |
497 if evt.mask & inotify.IN_ISDIR: | |
498 self.scan(wpath) | |
499 else: | |
8606
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inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
500 self.created(wpath) |
6239 | 501 |
502 def process_delete(self, wpath, evt): | |
503 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
504 self.ui.note(_('%s event: deleted %s\n') % |
6239 | 505 (self.event_time(), wpath)) |
506 | |
507 if evt.mask & inotify.IN_ISDIR: | |
8600
d46cdfcecaf1
inotify: proper fix for issue1542 (partially reverting 67e59a9886d5)
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8599
diff
changeset
|
508 tree = self.dir(self.tree, wpath).copy() |
d46cdfcecaf1
inotify: proper fix for issue1542 (partially reverting 67e59a9886d5)
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8599
diff
changeset
|
509 for wfn, ignore in self.walk('?', tree): |
d46cdfcecaf1
inotify: proper fix for issue1542 (partially reverting 67e59a9886d5)
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8599
diff
changeset
|
510 self.deletefile(join(wpath, wfn), '?') |
6239 | 511 self.scan(wpath) |
8600
d46cdfcecaf1
inotify: proper fix for issue1542 (partially reverting 67e59a9886d5)
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8599
diff
changeset
|
512 else: |
8606
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inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
513 self.deleted(wpath) |
6239 | 514 |
515 def process_modify(self, wpath, evt): | |
516 if self.ui.debugflag: | |
517 self.ui.note(_('%s event: modified %s\n') % | |
518 (self.event_time(), wpath)) | |
519 | |
520 if not (evt.mask & inotify.IN_ISDIR): | |
8606
1c5752dabf76
inotify: use a decorator instead of dispatching calls
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parents:
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diff
changeset
|
521 self.modified(wpath) |
6239 | 522 |
523 def process_unmount(self, evt): | |
524 self.ui.warn(_('filesystem containing %s was unmounted\n') % | |
525 evt.fullpath) | |
526 sys.exit(0) | |
527 | |
8609
aeaa0bd9dc24
inotify: process all inotify events in one batch
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8608
diff
changeset
|
528 def handle_pollevents(self, events): |
6239 | 529 if self.ui.debugflag: |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
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diff
changeset
|
530 self.ui.note(_('%s readable: %d bytes\n') % |
6239 | 531 (self.event_time(), self.threshold.readable())) |
532 if not self.threshold(): | |
533 if self.registered: | |
534 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
535 self.ui.note(_('%s below threshold - unhooking\n') % |
6239 | 536 (self.event_time())) |
8607
e17eba98c789
inotify: handle_event: do not use event and fd parameters.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8606
diff
changeset
|
537 self.master.poll.unregister(self.fileno()) |
6239 | 538 self.registered = False |
539 self.timeout = 250 | |
540 else: | |
541 self.read_events() | |
542 | |
543 def read_events(self, bufsize=None): | |
544 events = self.watcher.read(bufsize) | |
545 if self.ui.debugflag: | |
6961
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i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
546 self.ui.note(_('%s reading %d events\n') % |
6239 | 547 (self.event_time(), len(events))) |
548 for evt in events: | |
549 wpath = self.wpath(evt) | |
550 if evt.mask & inotify.IN_UNMOUNT: | |
551 self.process_unmount(wpath, evt) | |
552 elif evt.mask & (inotify.IN_MODIFY | inotify.IN_ATTRIB): | |
553 self.process_modify(wpath, evt) | |
554 elif evt.mask & (inotify.IN_DELETE | inotify.IN_DELETE_SELF | | |
555 inotify.IN_MOVED_FROM): | |
556 self.process_delete(wpath, evt) | |
557 elif evt.mask & (inotify.IN_CREATE | inotify.IN_MOVED_TO): | |
558 self.process_create(wpath, evt) | |
559 | |
8605
ed2d9bdbfad2
inotify: do not defer inotify events processing
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8604
diff
changeset
|
560 self.lastevent.clear() |
ed2d9bdbfad2
inotify: do not defer inotify events processing
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parents:
8604
diff
changeset
|
561 |
6239 | 562 def handle_timeout(self): |
563 if not self.registered: | |
564 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
565 self.ui.note(_('%s hooking back up with %d bytes readable\n') % |
6239 | 566 (self.event_time(), self.threshold.readable())) |
567 self.read_events(0) | |
8610
8ef1f63e554c
inotify: server: use a common 'pollable' interface for server & repowatcher
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8609
diff
changeset
|
568 self.master.poll.register(self, self.poll_events) |
6239 | 569 self.registered = True |
570 | |
571 self.timeout = None | |
572 | |
573 def shutdown(self): | |
574 self.watcher.close() | |
575 | |
8555
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
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parents:
8554
diff
changeset
|
576 def debug(self): |
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
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parents:
8554
diff
changeset
|
577 """ |
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
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parents:
8554
diff
changeset
|
578 Returns a sorted list of relatives paths currently watched, |
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
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parents:
8554
diff
changeset
|
579 for debugging purposes. |
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
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parents:
8554
diff
changeset
|
580 """ |
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
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parents:
8554
diff
changeset
|
581 return sorted(tuple[0][len(self.wprefix):] for tuple in self.watcher) |
3e09bc5fee12
inotify: introduce debuginotify, which lists which paths are under watch
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8554
diff
changeset
|
582 |
8610
8ef1f63e554c
inotify: server: use a common 'pollable' interface for server & repowatcher
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8609
diff
changeset
|
583 class server(pollable): |
8ef1f63e554c
inotify: server: use a common 'pollable' interface for server & repowatcher
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8609
diff
changeset
|
584 """ |
8ef1f63e554c
inotify: server: use a common 'pollable' interface for server & repowatcher
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8609
diff
changeset
|
585 Listens for client queries on unix socket inotify.sock |
8ef1f63e554c
inotify: server: use a common 'pollable' interface for server & repowatcher
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8609
diff
changeset
|
586 """ |
8335
713ec3f9c9de
inotify: Clarify the use of "watcher" name.
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parents:
8334
diff
changeset
|
587 def __init__(self, ui, repo, repowatcher, timeout): |
6239 | 588 self.ui = ui |
589 self.repo = repo | |
8335
713ec3f9c9de
inotify: Clarify the use of "watcher" name.
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parents:
8334
diff
changeset
|
590 self.repowatcher = repowatcher |
6239 | 591 self.timeout = timeout |
592 self.sock = socket.socket(socket.AF_UNIX) | |
593 self.sockpath = self.repo.join('inotify.sock') | |
6997
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
594 self.realsockpath = None |
6239 | 595 try: |
596 self.sock.bind(self.sockpath) | |
597 except socket.error, err: | |
598 if err[0] == errno.EADDRINUSE: | |
6997
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
599 raise AlreadyStartedException(_('could not start server: %s') |
6239 | 600 % err[1]) |
6997
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
601 if err[0] == "AF_UNIX path too long": |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
602 tempdir = tempfile.mkdtemp(prefix="hg-inotify-") |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
603 self.realsockpath = os.path.join(tempdir, "inotify.sock") |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
604 try: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
605 self.sock.bind(self.realsockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
606 os.symlink(self.realsockpath, self.sockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
607 except (OSError, socket.error), inst: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
608 try: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
609 os.unlink(self.realsockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
610 except: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
611 pass |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
612 os.rmdir(tempdir) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
613 if inst.errno == errno.EEXIST: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
614 raise AlreadyStartedException(_('could not start server: %s') |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
615 % inst.strerror) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
616 raise |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
617 else: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
618 raise |
6239 | 619 self.sock.listen(5) |
620 self.fileno = self.sock.fileno | |
621 | |
622 def handle_timeout(self): | |
623 pass | |
624 | |
8554
47d7347484f5
inotify: put STAT-specific query answer generation part in its own method
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8553
diff
changeset
|
625 def answer_stat_query(self, cs): |
6239 | 626 names = cs.read().split('\0') |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
627 |
6239 | 628 states = names.pop() |
629 | |
630 self.ui.note(_('answering query for %r\n') % states) | |
631 | |
8335
713ec3f9c9de
inotify: Clarify the use of "watcher" name.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8334
diff
changeset
|
632 if self.repowatcher.timeout: |
6239 | 633 # We got a query while a rescan is pending. Make sure we |
634 # rescan before responding, or we could give back a wrong | |
635 # answer. | |
8335
713ec3f9c9de
inotify: Clarify the use of "watcher" name.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8334
diff
changeset
|
636 self.repowatcher.handle_timeout() |
6239 | 637 |
638 if not names: | |
639 def genresult(states, tree): | |
8335
713ec3f9c9de
inotify: Clarify the use of "watcher" name.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8334
diff
changeset
|
640 for fn, state in self.repowatcher.walk(states, tree): |
6239 | 641 yield fn |
642 else: | |
643 def genresult(states, tree): | |
644 for fn in names: | |
8335
713ec3f9c9de
inotify: Clarify the use of "watcher" name.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
8334
diff
changeset
|
645 l = self.repowatcher.lookup(fn, tree) |
7351
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
646 try: |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
647 if l in states: |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
648 yield fn |
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649 except TypeError: |
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650 for f, s in self.repowatcher.walk(states, l, fn): |
7351
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651 yield f |
6239 | 652 |
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653 return ['\0'.join(r) for r in [ |
8335
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654 genresult('l', self.repowatcher.statustrees['l']), |
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655 genresult('m', self.repowatcher.statustrees['m']), |
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656 genresult('a', self.repowatcher.statustrees['a']), |
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657 genresult('r', self.repowatcher.statustrees['r']), |
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658 genresult('!', self.repowatcher.statustrees['!']), |
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659 '?' in states |
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660 and genresult('?', self.repowatcher.statustrees['?']) |
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661 or [], |
6239 | 662 [], |
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663 'c' in states and genresult('n', self.repowatcher.tree) or [], |
6239 | 664 ]] |
665 | |
8555
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666 def answer_dbug_query(self): |
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667 return ['\0'.join(self.repowatcher.debug())] |
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668 |
8609
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669 def handle_pollevents(self, events): |
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670 for e in events: |
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671 self.handle_pollevent() |
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672 |
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673 def handle_pollevent(self): |
8554
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674 sock, addr = self.sock.accept() |
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675 |
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676 cs = common.recvcs(sock) |
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677 version = ord(cs.read(1)) |
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678 |
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679 if version != common.version: |
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680 self.ui.warn(_('received query from incompatible client ' |
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681 'version %d\n') % version) |
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682 return |
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683 |
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684 type = cs.read(4) |
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685 |
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686 if type == 'STAT': |
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687 results = self.answer_stat_query(cs) |
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688 elif type == 'DBUG': |
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689 results = self.answer_dbug_query() |
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690 else: |
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691 self.ui.warn(_('unrecognized query type: %s\n') % type) |
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692 return |
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693 |
6239 | 694 try: |
695 try: | |
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696 v = chr(common.version) |
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697 |
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698 sock.sendall(v + type + struct.pack(common.resphdrfmts[type], |
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699 *map(len, results))) |
6239 | 700 sock.sendall(''.join(results)) |
701 finally: | |
702 sock.shutdown(socket.SHUT_WR) | |
703 except socket.error, err: | |
704 if err[0] != errno.EPIPE: | |
705 raise | |
706 | |
707 def shutdown(self): | |
708 self.sock.close() | |
709 try: | |
710 os.unlink(self.sockpath) | |
6997
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711 if self.realsockpath: |
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712 os.unlink(self.realsockpath) |
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713 os.rmdir(os.path.dirname(self.realsockpath)) |
6239 | 714 except OSError, err: |
715 if err.errno != errno.ENOENT: | |
716 raise | |
717 | |
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718 class master(object): |
6239 | 719 def __init__(self, ui, repo, timeout=None): |
720 self.ui = ui | |
721 self.repo = repo | |
722 self.poll = select.poll() | |
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723 self.repowatcher = repowatcher(ui, repo, self) |
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724 self.server = server(ui, repo, self.repowatcher, timeout) |
6239 | 725 self.table = {} |
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726 for obj in (self.repowatcher, self.server): |
6239 | 727 fd = obj.fileno() |
728 self.table[fd] = obj | |
729 self.poll.register(fd, obj.poll_events) | |
730 | |
731 def register(self, fd, mask): | |
732 self.poll.register(fd, mask) | |
733 | |
734 def shutdown(self): | |
735 for obj in self.table.itervalues(): | |
736 obj.shutdown() | |
737 | |
738 def run(self): | |
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739 self.repowatcher.setup() |
6239 | 740 self.ui.note(_('finished setup\n')) |
741 if os.getenv('TIME_STARTUP'): | |
742 sys.exit(0) | |
743 while True: | |
744 timeout = None | |
745 timeobj = None | |
746 for obj in self.table.itervalues(): | |
747 if obj.timeout is not None and (timeout is None or obj.timeout < timeout): | |
748 timeout, timeobj = obj.timeout, obj | |
749 try: | |
750 if self.ui.debugflag: | |
751 if timeout is None: | |
6961
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752 self.ui.note(_('polling: no timeout\n')) |
6239 | 753 else: |
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754 self.ui.note(_('polling: %sms timeout\n') % timeout) |
6239 | 755 events = self.poll.poll(timeout) |
756 except select.error, err: | |
757 if err[0] == errno.EINTR: | |
758 continue | |
759 raise | |
760 if events: | |
8609
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761 by_fd = {} |
6239 | 762 for fd, event in events: |
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763 by_fd.setdefault(fd, []).append(event) |
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764 |
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765 for fd, events in by_fd.iteritems(): |
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766 self.table[fd].handle_pollevents(events) |
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767 |
6239 | 768 elif timeobj: |
769 timeobj.handle_timeout() | |
770 | |
771 def start(ui, repo): | |
7451
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772 def closefds(ignore): |
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773 # (from python bug #1177468) |
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774 # close all inherited file descriptors |
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775 # Python 2.4.1 and later use /dev/urandom to seed the random module's RNG |
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776 # a file descriptor is kept internally as os._urandomfd (created on demand |
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777 # the first time os.urandom() is called), and should not be closed |
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778 try: |
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779 os.urandom(4) |
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780 urandom_fd = getattr(os, '_urandomfd', None) |
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781 except AttributeError: |
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782 urandom_fd = None |
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783 ignore.append(urandom_fd) |
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784 for fd in range(3, 256): |
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785 if fd in ignore: |
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786 continue |
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787 try: |
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788 os.close(fd) |
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789 except OSError: |
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|
790 pass |
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791 |
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792 m = master(ui, repo) |
6239 | 793 sys.stdout.flush() |
794 sys.stderr.flush() | |
795 | |
796 pid = os.fork() | |
797 if pid: | |
798 return pid | |
799 | |
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800 closefds([m.server.fileno(), m.repowatcher.fileno()]) |
6239 | 801 os.setsid() |
802 | |
803 fd = os.open('/dev/null', os.O_RDONLY) | |
804 os.dup2(fd, 0) | |
805 if fd > 0: | |
806 os.close(fd) | |
807 | |
808 fd = os.open(ui.config('inotify', 'log', '/dev/null'), | |
809 os.O_RDWR | os.O_CREAT | os.O_TRUNC) | |
810 os.dup2(fd, 1) | |
811 os.dup2(fd, 2) | |
812 if fd > 2: | |
813 os.close(fd) | |
814 | |
815 try: | |
816 m.run() | |
817 finally: | |
818 m.shutdown() | |
819 os._exit(0) |