Mercurial > hg
annotate hgext/inotify/server.py @ 8325:f2559645643a
inotify: inotify.server.walk() simplify control flow
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
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date | Mon, 04 May 2009 18:04:41 +0900 |
parents | b923d599c309 |
children | 0695288e8c37 |
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) |
6239 | 76 elif kind in (stat.S_IFREG, stat.S_IFLNK): |
77 files.append((name, kind)) | |
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78 yield fullpath, dirs, files |
6239 | 79 |
80 for subdir in dirs: | |
81 path = join(root, subdir) | |
82 if repo.dirstate._ignore(path): | |
83 continue | |
84 for result in walkit(path, False): | |
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85 yield result |
6239 | 86 except OSError, err: |
87 if err.errno not in walk_ignored_errors: | |
88 raise | |
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89 |
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90 return walkit(root, root == '') |
6239 | 91 |
92 def _explain_watch_limit(ui, repo, count): | |
93 path = '/proc/sys/fs/inotify/max_user_watches' | |
94 try: | |
95 limit = int(file(path).read()) | |
96 except IOError, err: | |
97 if err.errno != errno.ENOENT: | |
98 raise | |
99 raise util.Abort(_('this system does not seem to ' | |
100 'support inotify')) | |
101 ui.warn(_('*** the current per-user limit on the number ' | |
102 'of inotify watches is %s\n') % limit) | |
103 ui.warn(_('*** this limit is too low to watch every ' | |
104 'directory in this repository\n')) | |
105 ui.warn(_('*** counting directories: ')) | |
106 ndirs = len(list(walkrepodirs(repo))) | |
107 ui.warn(_('found %d\n') % ndirs) | |
108 newlimit = min(limit, 1024) | |
109 while newlimit < ((limit + ndirs) * 1.1): | |
110 newlimit *= 2 | |
111 ui.warn(_('*** to raise the limit from %d to %d (run as root):\n') % | |
112 (limit, newlimit)) | |
113 ui.warn(_('*** echo %d > %s\n') % (newlimit, path)) | |
114 raise util.Abort(_('cannot watch %s until inotify watch limit is raised') | |
115 % repo.root) | |
116 | |
117 class Watcher(object): | |
118 poll_events = select.POLLIN | |
119 statuskeys = 'almr!?' | |
120 | |
121 def __init__(self, ui, repo, master): | |
122 self.ui = ui | |
123 self.repo = repo | |
124 self.wprefix = self.repo.wjoin('') | |
125 self.timeout = None | |
126 self.master = master | |
127 self.mask = ( | |
128 inotify.IN_ATTRIB | | |
129 inotify.IN_CREATE | | |
130 inotify.IN_DELETE | | |
131 inotify.IN_DELETE_SELF | | |
132 inotify.IN_MODIFY | | |
133 inotify.IN_MOVED_FROM | | |
134 inotify.IN_MOVED_TO | | |
135 inotify.IN_MOVE_SELF | | |
136 inotify.IN_ONLYDIR | | |
137 inotify.IN_UNMOUNT | | |
138 0) | |
139 try: | |
140 self.watcher = watcher.Watcher() | |
141 except OSError, err: | |
142 raise util.Abort(_('inotify service not available: %s') % | |
143 err.strerror) | |
144 self.threshold = watcher.Threshold(self.watcher) | |
145 self.registered = True | |
146 self.fileno = self.watcher.fileno | |
147 | |
148 self.repo.dirstate.__class__.inotifyserver = True | |
149 | |
150 self.tree = {} | |
151 self.statcache = {} | |
152 self.statustrees = dict([(s, {}) for s in self.statuskeys]) | |
153 | |
154 self.watches = 0 | |
155 self.last_event = None | |
156 | |
157 self.eventq = {} | |
158 self.deferred = 0 | |
159 | |
160 self.ds_info = self.dirstate_info() | |
161 self.scan() | |
162 | |
163 def event_time(self): | |
164 last = self.last_event | |
165 now = time.time() | |
166 self.last_event = now | |
167 | |
168 if last is None: | |
169 return 'start' | |
170 delta = now - last | |
171 if delta < 5: | |
172 return '+%.3f' % delta | |
173 if delta < 50: | |
174 return '+%.2f' % delta | |
175 return '+%.1f' % delta | |
176 | |
177 def dirstate_info(self): | |
178 try: | |
179 st = os.lstat(self.repo.join('dirstate')) | |
180 return st.st_mtime, st.st_ino | |
181 except OSError, err: | |
182 if err.errno != errno.ENOENT: | |
183 raise | |
184 return 0, 0 | |
185 | |
186 def add_watch(self, path, mask): | |
187 if not path: | |
188 return | |
189 if self.watcher.path(path) is None: | |
190 if self.ui.debugflag: | |
191 self.ui.note(_('watching %r\n') % path[len(self.wprefix):]) | |
192 try: | |
193 self.watcher.add(path, mask) | |
194 self.watches += 1 | |
195 except OSError, err: | |
196 if err.errno in (errno.ENOENT, errno.ENOTDIR): | |
197 return | |
198 if err.errno != errno.ENOSPC: | |
199 raise | |
200 _explain_watch_limit(self.ui, self.repo, self.watches) | |
201 | |
202 def setup(self): | |
203 self.ui.note(_('watching directories under %r\n') % self.repo.root) | |
204 self.add_watch(self.repo.path, inotify.IN_DELETE) | |
205 self.check_dirstate() | |
206 | |
207 def wpath(self, evt): | |
208 path = evt.fullpath | |
209 if path == self.repo.root: | |
210 return '' | |
211 if path.startswith(self.wprefix): | |
212 return path[len(self.wprefix):] | |
213 raise 'wtf? ' + path | |
214 | |
215 def dir(self, tree, path): | |
216 if path: | |
217 for name in path.split('/'): | |
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218 tree.setdefault(name, {}) |
6239 | 219 tree = tree[name] |
220 return tree | |
221 | |
222 def lookup(self, path, tree): | |
223 if path: | |
224 try: | |
225 for name in path.split('/'): | |
226 tree = tree[name] | |
227 except KeyError: | |
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228 return 'x' |
6239 | 229 except TypeError: |
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230 return 'd' |
6239 | 231 return tree |
232 | |
233 def split(self, path): | |
234 c = path.rfind('/') | |
235 if c == -1: | |
236 return '', path | |
237 return path[:c], path[c+1:] | |
238 | |
239 def filestatus(self, fn, st): | |
240 try: | |
241 type_, mode, size, time = self.repo.dirstate._map[fn][:4] | |
242 except KeyError: | |
243 type_ = '?' | |
244 if type_ == 'n': | |
245 if not st: | |
246 return '!' | |
247 st_mode, st_size, st_mtime = st | |
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248 if size == -1: |
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249 return 'l' |
6239 | 250 if size and (size != st_size or (mode ^ st_mode) & 0100): |
251 return 'm' | |
252 if time != int(st_mtime): | |
253 return 'l' | |
254 return 'n' | |
255 if type_ in 'ma' and not st: | |
256 return '!' | |
257 if type_ == '?' and self.repo.dirstate._ignore(fn): | |
258 return 'i' | |
259 return type_ | |
260 | |
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261 def updatestatus(self, wfn, st=None, status=None): |
6239 | 262 if st: |
263 status = self.filestatus(wfn, st) | |
264 else: | |
265 self.statcache.pop(wfn, None) | |
266 root, fn = self.split(wfn) | |
267 d = self.dir(self.tree, root) | |
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268 oldstatus = d.get(fn) |
6239 | 269 isdir = False |
270 if oldstatus: | |
271 try: | |
272 if not status: | |
273 if oldstatus in 'almn': | |
274 status = '!' | |
275 elif oldstatus == 'r': | |
276 status = 'r' | |
277 except TypeError: | |
278 # oldstatus may be a dict left behind by a deleted | |
279 # directory | |
280 isdir = True | |
281 else: | |
282 if oldstatus in self.statuskeys and oldstatus != status: | |
283 del self.dir(self.statustrees[oldstatus], root)[fn] | |
284 if self.ui.debugflag and oldstatus != status: | |
285 if isdir: | |
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286 self.ui.note(_('status: %r dir(%d) -> %s\n') % |
6239 | 287 (wfn, len(oldstatus), status)) |
288 else: | |
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289 self.ui.note(_('status: %r %s -> %s\n') % |
6239 | 290 (wfn, oldstatus, status)) |
291 if not isdir: | |
292 if status and status != 'i': | |
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293 d[fn] = status |
6239 | 294 if status in self.statuskeys: |
295 dd = self.dir(self.statustrees[status], root) | |
296 if oldstatus != status or fn not in dd: | |
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297 dd[fn] = status |
6239 | 298 else: |
299 d.pop(fn, None) | |
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300 elif not status: |
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301 # a directory is being removed, check its contents |
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302 for subfile, b in oldstatus.copy().iteritems(): |
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303 self.updatestatus(wfn + '/' + subfile, None) |
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304 |
6239 | 305 |
306 def check_deleted(self, key): | |
307 # Files that had been deleted but were present in the dirstate | |
308 # may have vanished from the dirstate; we must clean them up. | |
309 nuke = [] | |
310 for wfn, ignore in self.walk(key, self.statustrees[key]): | |
311 if wfn not in self.repo.dirstate: | |
312 nuke.append(wfn) | |
313 for wfn in nuke: | |
314 root, fn = self.split(wfn) | |
315 del self.dir(self.statustrees[key], root)[fn] | |
316 del self.dir(self.tree, root)[fn] | |
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317 |
6239 | 318 def scan(self, topdir=''): |
319 self.handle_timeout() | |
320 ds = self.repo.dirstate._map.copy() | |
321 self.add_watch(join(self.repo.root, topdir), self.mask) | |
322 for root, dirs, entries in walk(self.repo, topdir): | |
323 for d in dirs: | |
324 self.add_watch(join(root, d), self.mask) | |
325 wroot = root[len(self.wprefix):] | |
326 d = self.dir(self.tree, wroot) | |
327 for fn, kind in entries: | |
328 wfn = join(wroot, fn) | |
329 self.updatestatus(wfn, self.getstat(wfn)) | |
330 ds.pop(wfn, None) | |
331 wtopdir = topdir | |
332 if wtopdir and wtopdir[-1] != '/': | |
333 wtopdir += '/' | |
334 for wfn, state in ds.iteritems(): | |
335 if not wfn.startswith(wtopdir): | |
336 continue | |
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337 try: |
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338 st = self.stat(wfn) |
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339 except OSError: |
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340 status = state[0] |
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341 self.updatestatus(wfn, None, status=status) |
6239 | 342 else: |
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343 self.updatestatus(wfn, st) |
6239 | 344 self.check_deleted('!') |
345 self.check_deleted('r') | |
346 | |
347 def check_dirstate(self): | |
348 ds_info = self.dirstate_info() | |
349 if ds_info == self.ds_info: | |
350 return | |
351 self.ds_info = ds_info | |
352 if not self.ui.debugflag: | |
353 self.last_event = None | |
354 self.ui.note(_('%s dirstate reload\n') % self.event_time()) | |
355 self.repo.dirstate.invalidate() | |
356 self.scan() | |
357 self.ui.note(_('%s end dirstate reload\n') % self.event_time()) | |
358 | |
359 def walk(self, states, tree, prefix=''): | |
360 # This is the "inner loop" when talking to the client. | |
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361 |
6239 | 362 for name, val in tree.iteritems(): |
363 path = join(prefix, name) | |
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364 try: |
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365 if val in states: |
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diff
changeset
|
366 yield path, val |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
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parents:
7350
diff
changeset
|
367 except TypeError: |
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Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
368 for p in self.walk(states, val, path): |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
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parents:
7350
diff
changeset
|
369 yield p |
6239 | 370 |
371 def update_hgignore(self): | |
372 # An update of the ignore file can potentially change the | |
373 # states of all unknown and ignored files. | |
374 | |
375 # XXX If the user has other ignore files outside the repo, or | |
376 # changes their list of ignore files at run time, we'll | |
377 # potentially never see changes to them. We could get the | |
378 # client to report to us what ignore data they're using. | |
379 # But it's easier to do nothing than to open that can of | |
380 # worms. | |
381 | |
7085
1fcc282e2c43
inotify: fixup rebuilding ignore
Matt Mackall <mpm@selenic.com>
parents:
7082
diff
changeset
|
382 if '_ignore' in self.repo.dirstate.__dict__: |
1fcc282e2c43
inotify: fixup rebuilding ignore
Matt Mackall <mpm@selenic.com>
parents:
7082
diff
changeset
|
383 delattr(self.repo.dirstate, '_ignore') |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
384 self.ui.note(_('rescanning due to .hgignore change\n')) |
6239 | 385 self.scan() |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
386 |
6239 | 387 def getstat(self, wpath): |
388 try: | |
389 return self.statcache[wpath] | |
390 except KeyError: | |
391 try: | |
392 return self.stat(wpath) | |
393 except OSError, err: | |
394 if err.errno != errno.ENOENT: | |
395 raise | |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
396 |
6239 | 397 def stat(self, wpath): |
398 try: | |
399 st = os.lstat(join(self.wprefix, wpath)) | |
400 ret = st.st_mode, st.st_size, st.st_mtime | |
401 self.statcache[wpath] = ret | |
402 return ret | |
7280
810ca383da9c
remove unused variables
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7220
diff
changeset
|
403 except OSError: |
6239 | 404 self.statcache.pop(wpath, None) |
405 raise | |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
406 |
6239 | 407 def created(self, wpath): |
408 if wpath == '.hgignore': | |
409 self.update_hgignore() | |
410 try: | |
411 st = self.stat(wpath) | |
412 if stat.S_ISREG(st[0]): | |
413 self.updatestatus(wpath, st) | |
7280
810ca383da9c
remove unused variables
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7220
diff
changeset
|
414 except OSError: |
6239 | 415 pass |
416 | |
417 def modified(self, wpath): | |
418 if wpath == '.hgignore': | |
419 self.update_hgignore() | |
420 try: | |
421 st = self.stat(wpath) | |
422 if stat.S_ISREG(st[0]): | |
423 if self.repo.dirstate[wpath] in 'lmn': | |
424 self.updatestatus(wpath, st) | |
425 except OSError: | |
426 pass | |
427 | |
428 def deleted(self, wpath): | |
429 if wpath == '.hgignore': | |
430 self.update_hgignore() | |
431 elif wpath.startswith('.hg/'): | |
432 if wpath == '.hg/wlock': | |
433 self.check_dirstate() | |
434 return | |
435 | |
436 self.updatestatus(wpath, None) | |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
437 |
6239 | 438 def schedule_work(self, wpath, evt): |
439 self.eventq.setdefault(wpath, []) | |
440 prev = self.eventq[wpath] | |
441 try: | |
442 if prev and evt == 'm' and prev[-1] in 'cm': | |
443 return | |
444 self.eventq[wpath].append(evt) | |
445 finally: | |
446 self.deferred += 1 | |
447 self.timeout = 250 | |
448 | |
449 def deferred_event(self, wpath, evt): | |
450 if evt == 'c': | |
451 self.created(wpath) | |
452 elif evt == 'm': | |
453 self.modified(wpath) | |
454 elif evt == 'd': | |
455 self.deleted(wpath) | |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
456 |
6239 | 457 def process_create(self, wpath, evt): |
458 if self.ui.debugflag: | |
459 self.ui.note(_('%s event: created %s\n') % | |
460 (self.event_time(), wpath)) | |
461 | |
462 if evt.mask & inotify.IN_ISDIR: | |
463 self.scan(wpath) | |
464 else: | |
465 self.schedule_work(wpath, 'c') | |
466 | |
467 def process_delete(self, wpath, evt): | |
468 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
469 self.ui.note(_('%s event: deleted %s\n') % |
6239 | 470 (self.event_time(), wpath)) |
471 | |
472 if evt.mask & inotify.IN_ISDIR: | |
473 self.scan(wpath) | |
7892
67e59a9886d5
Fixing issue1542, adding a relevant test
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
7451
diff
changeset
|
474 self.schedule_work(wpath, 'd') |
6239 | 475 |
476 def process_modify(self, wpath, evt): | |
477 if self.ui.debugflag: | |
478 self.ui.note(_('%s event: modified %s\n') % | |
479 (self.event_time(), wpath)) | |
480 | |
481 if not (evt.mask & inotify.IN_ISDIR): | |
482 self.schedule_work(wpath, 'm') | |
483 | |
484 def process_unmount(self, evt): | |
485 self.ui.warn(_('filesystem containing %s was unmounted\n') % | |
486 evt.fullpath) | |
487 sys.exit(0) | |
488 | |
489 def handle_event(self, fd, event): | |
490 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
491 self.ui.note(_('%s readable: %d bytes\n') % |
6239 | 492 (self.event_time(), self.threshold.readable())) |
493 if not self.threshold(): | |
494 if self.registered: | |
495 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
496 self.ui.note(_('%s below threshold - unhooking\n') % |
6239 | 497 (self.event_time())) |
498 self.master.poll.unregister(fd) | |
499 self.registered = False | |
500 self.timeout = 250 | |
501 else: | |
502 self.read_events() | |
503 | |
504 def read_events(self, bufsize=None): | |
505 events = self.watcher.read(bufsize) | |
506 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
507 self.ui.note(_('%s reading %d events\n') % |
6239 | 508 (self.event_time(), len(events))) |
509 for evt in events: | |
510 wpath = self.wpath(evt) | |
511 if evt.mask & inotify.IN_UNMOUNT: | |
512 self.process_unmount(wpath, evt) | |
513 elif evt.mask & (inotify.IN_MODIFY | inotify.IN_ATTRIB): | |
514 self.process_modify(wpath, evt) | |
515 elif evt.mask & (inotify.IN_DELETE | inotify.IN_DELETE_SELF | | |
516 inotify.IN_MOVED_FROM): | |
517 self.process_delete(wpath, evt) | |
518 elif evt.mask & (inotify.IN_CREATE | inotify.IN_MOVED_TO): | |
519 self.process_create(wpath, evt) | |
520 | |
521 def handle_timeout(self): | |
522 if not self.registered: | |
523 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
524 self.ui.note(_('%s hooking back up with %d bytes readable\n') % |
6239 | 525 (self.event_time(), self.threshold.readable())) |
526 self.read_events(0) | |
527 self.master.poll.register(self, select.POLLIN) | |
528 self.registered = True | |
529 | |
530 if self.eventq: | |
531 if self.ui.debugflag: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
532 self.ui.note(_('%s processing %d deferred events as %d\n') % |
6239 | 533 (self.event_time(), self.deferred, |
534 len(self.eventq))) | |
8209
a1a5a57efe90
replace util.sort with sorted built-in
Matt Mackall <mpm@selenic.com>
parents:
7892
diff
changeset
|
535 for wpath, evts in sorted(self.eventq.iteritems()): |
6239 | 536 for evt in evts: |
537 self.deferred_event(wpath, evt) | |
538 self.eventq.clear() | |
539 self.deferred = 0 | |
540 self.timeout = None | |
541 | |
542 def shutdown(self): | |
543 self.watcher.close() | |
544 | |
545 class Server(object): | |
546 poll_events = select.POLLIN | |
547 | |
548 def __init__(self, ui, repo, watcher, timeout): | |
549 self.ui = ui | |
550 self.repo = repo | |
551 self.watcher = watcher | |
552 self.timeout = timeout | |
553 self.sock = socket.socket(socket.AF_UNIX) | |
554 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
|
555 self.realsockpath = None |
6239 | 556 try: |
557 self.sock.bind(self.sockpath) | |
558 except socket.error, err: | |
559 if err[0] == errno.EADDRINUSE: | |
6997
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
560 raise AlreadyStartedException(_('could not start server: %s') |
6239 | 561 % err[1]) |
6997
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
562 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
|
563 tempdir = tempfile.mkdtemp(prefix="hg-inotify-") |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
564 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
|
565 try: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
566 self.sock.bind(self.realsockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
567 os.symlink(self.realsockpath, self.sockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
568 except (OSError, socket.error), inst: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
569 try: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
570 os.unlink(self.realsockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
571 except: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
572 pass |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
573 os.rmdir(tempdir) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
574 if inst.errno == errno.EEXIST: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
575 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
|
576 % inst.strerror) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
577 raise |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
578 else: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
579 raise |
6239 | 580 self.sock.listen(5) |
581 self.fileno = self.sock.fileno | |
582 | |
583 def handle_timeout(self): | |
584 pass | |
585 | |
586 def handle_event(self, fd, event): | |
587 sock, addr = self.sock.accept() | |
588 | |
589 cs = common.recvcs(sock) | |
590 version = ord(cs.read(1)) | |
591 | |
592 sock.sendall(chr(common.version)) | |
593 | |
594 if version != common.version: | |
595 self.ui.warn(_('received query from incompatible client ' | |
596 'version %d\n') % version) | |
597 return | |
598 | |
599 names = cs.read().split('\0') | |
6287
c86207d41512
Spacing cleanup
Thomas Arendsen Hein <thomas@intevation.de>
parents:
6239
diff
changeset
|
600 |
6239 | 601 states = names.pop() |
602 | |
603 self.ui.note(_('answering query for %r\n') % states) | |
604 | |
605 if self.watcher.timeout: | |
606 # We got a query while a rescan is pending. Make sure we | |
607 # rescan before responding, or we could give back a wrong | |
608 # answer. | |
609 self.watcher.handle_timeout() | |
610 | |
611 if not names: | |
612 def genresult(states, tree): | |
613 for fn, state in self.watcher.walk(states, tree): | |
614 yield fn | |
615 else: | |
616 def genresult(states, tree): | |
617 for fn in names: | |
618 l = self.watcher.lookup(fn, tree) | |
7351
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
619 try: |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
620 if l in states: |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
621 yield fn |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
622 except TypeError: |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
623 for f, s in self.watcher.walk(states, l, fn): |
5ab0abf27dd9
Backed out changeset c5dbe86b0fee (issue1375)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7350
diff
changeset
|
624 yield f |
6239 | 625 |
626 results = ['\0'.join(r) for r in [ | |
627 genresult('l', self.watcher.statustrees['l']), | |
628 genresult('m', self.watcher.statustrees['m']), | |
629 genresult('a', self.watcher.statustrees['a']), | |
630 genresult('r', self.watcher.statustrees['r']), | |
631 genresult('!', self.watcher.statustrees['!']), | |
632 '?' in states and genresult('?', self.watcher.statustrees['?']) or [], | |
633 [], | |
634 'c' in states and genresult('n', self.watcher.tree) or [], | |
635 ]] | |
636 | |
637 try: | |
638 try: | |
639 sock.sendall(struct.pack(common.resphdrfmt, | |
640 *map(len, results))) | |
641 sock.sendall(''.join(results)) | |
642 finally: | |
643 sock.shutdown(socket.SHUT_WR) | |
644 except socket.error, err: | |
645 if err[0] != errno.EPIPE: | |
646 raise | |
647 | |
648 def shutdown(self): | |
649 self.sock.close() | |
650 try: | |
651 os.unlink(self.sockpath) | |
6997
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
652 if self.realsockpath: |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
653 os.unlink(self.realsockpath) |
9c4e488f105e
inotify: workaround ENAMETOOLONG by using symlinks
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
6994
diff
changeset
|
654 os.rmdir(os.path.dirname(self.realsockpath)) |
6239 | 655 except OSError, err: |
656 if err.errno != errno.ENOENT: | |
657 raise | |
658 | |
659 class Master(object): | |
660 def __init__(self, ui, repo, timeout=None): | |
661 self.ui = ui | |
662 self.repo = repo | |
663 self.poll = select.poll() | |
664 self.watcher = Watcher(ui, repo, self) | |
665 self.server = Server(ui, repo, self.watcher, timeout) | |
666 self.table = {} | |
667 for obj in (self.watcher, self.server): | |
668 fd = obj.fileno() | |
669 self.table[fd] = obj | |
670 self.poll.register(fd, obj.poll_events) | |
671 | |
672 def register(self, fd, mask): | |
673 self.poll.register(fd, mask) | |
674 | |
675 def shutdown(self): | |
676 for obj in self.table.itervalues(): | |
677 obj.shutdown() | |
678 | |
679 def run(self): | |
680 self.watcher.setup() | |
681 self.ui.note(_('finished setup\n')) | |
682 if os.getenv('TIME_STARTUP'): | |
683 sys.exit(0) | |
684 while True: | |
685 timeout = None | |
686 timeobj = None | |
687 for obj in self.table.itervalues(): | |
688 if obj.timeout is not None and (timeout is None or obj.timeout < timeout): | |
689 timeout, timeobj = obj.timeout, obj | |
690 try: | |
691 if self.ui.debugflag: | |
692 if timeout is None: | |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
693 self.ui.note(_('polling: no timeout\n')) |
6239 | 694 else: |
6961
12163fb21fce
i18n: mark strings for translation in inotify extension
Martin Geisler <mg@daimi.au.dk>
parents:
6909
diff
changeset
|
695 self.ui.note(_('polling: %sms timeout\n') % timeout) |
6239 | 696 events = self.poll.poll(timeout) |
697 except select.error, err: | |
698 if err[0] == errno.EINTR: | |
699 continue | |
700 raise | |
701 if events: | |
702 for fd, event in events: | |
703 self.table[fd].handle_event(fd, event) | |
704 elif timeobj: | |
705 timeobj.handle_timeout() | |
706 | |
707 def start(ui, repo): | |
7451
fca9947652ce
inotify: close most file descriptors when autostarting
Brendan Cully <brendan@kublai.com>
parents:
7420
diff
changeset
|
708 def closefds(ignore): |
fca9947652ce
inotify: close most file descriptors when autostarting
Brendan Cully <brendan@kublai.com>
parents:
7420
diff
changeset
|
709 # (from python bug #1177468) |
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710 # close all inherited file descriptors |
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711 # Python 2.4.1 and later use /dev/urandom to seed the random module's RNG |
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712 # a file descriptor is kept internally as os._urandomfd (created on demand |
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713 # the first time os.urandom() is called), and should not be closed |
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714 try: |
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715 os.urandom(4) |
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716 urandom_fd = getattr(os, '_urandomfd', None) |
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717 except AttributeError: |
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718 urandom_fd = None |
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719 ignore.append(urandom_fd) |
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720 for fd in range(3, 256): |
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721 if fd in ignore: |
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722 continue |
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723 try: |
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724 os.close(fd) |
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725 except OSError: |
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726 pass |
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727 |
6239 | 728 m = Master(ui, repo) |
729 sys.stdout.flush() | |
730 sys.stderr.flush() | |
731 | |
732 pid = os.fork() | |
733 if pid: | |
734 return pid | |
735 | |
7451
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736 closefds([m.server.fileno(), m.watcher.fileno()]) |
6239 | 737 os.setsid() |
738 | |
739 fd = os.open('/dev/null', os.O_RDONLY) | |
740 os.dup2(fd, 0) | |
741 if fd > 0: | |
742 os.close(fd) | |
743 | |
744 fd = os.open(ui.config('inotify', 'log', '/dev/null'), | |
745 os.O_RDWR | os.O_CREAT | os.O_TRUNC) | |
746 os.dup2(fd, 1) | |
747 os.dup2(fd, 2) | |
748 if fd > 2: | |
749 os.close(fd) | |
750 | |
751 try: | |
752 m.run() | |
753 finally: | |
754 m.shutdown() | |
755 os._exit(0) |