[PATH_FAILED] = UNIT_FAILED
};
-static void path_init(Unit *u) {
- Path *p = PATH(u);
+int pathspec_watch(PathSpec *s, Unit *u) {
+ static const int flags_table[_PATH_TYPE_MAX] = {
+ [PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
+ [PATH_EXISTS_GLOB] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
+ [PATH_CHANGED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO,
+ [PATH_DIRECTORY_NOT_EMPTY] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CREATE|IN_MOVED_TO
+ };
+
+ bool exists = false;
+ char *k, *slash;
+ int r;
assert(u);
- assert(u->meta.load_state == UNIT_STUB);
+ assert(s);
- p->directory_mode = 0755;
+ pathspec_unwatch(s, u);
+
+ if (!(k = strdup(s->path)))
+ return -ENOMEM;
+
+ if ((s->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC)) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (unit_watch_fd(u, s->inotify_fd, EPOLLIN, &s->watch) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if ((s->primary_wd = inotify_add_watch(s->inotify_fd, k, flags_table[s->type])) >= 0)
+ exists = true;
+
+ do {
+ int flags;
+
+ /* This assumes the path was passed through path_kill_slashes()! */
+ if (!(slash = strrchr(k, '/')))
+ break;
+
+ /* Trim the path at the last slash. Keep the slash if it's the root dir. */
+ slash[slash == k] = 0;
+
+ flags = IN_MOVE_SELF;
+ if (!exists)
+ flags |= IN_DELETE_SELF | IN_ATTRIB | IN_CREATE | IN_MOVED_TO;
+
+ if (inotify_add_watch(s->inotify_fd, k, flags) >= 0)
+ exists = true;
+ } while (slash != k);
+
+ return 0;
+
+fail:
+ free(k);
+
+ pathspec_unwatch(s, u);
+ return r;
}
-static void path_unwatch_one(Path *p, PathSpec *s) {
+void pathspec_unwatch(PathSpec *s, Unit *u) {
if (s->inotify_fd < 0)
return;
- unit_unwatch_fd(UNIT(p), &s->watch);
+ unit_unwatch_fd(u, &s->watch);
close_nointr_nofail(s->inotify_fd);
s->inotify_fd = -1;
}
+int pathspec_fd_event(PathSpec *s, uint32_t events) {
+ uint8_t *buf = NULL;
+ struct inotify_event *e;
+ ssize_t k;
+ int l;
+ int r = 0;
+
+ if (events != EPOLLIN) {
+ log_error("Got Invalid poll event on inotify.");
+ r = -EINVAL;
+ goto out;
+ }
+
+ if (ioctl(s->inotify_fd, FIONREAD, &l) < 0) {
+ log_error("FIONREAD failed: %m");
+ r = -errno;
+ goto out;
+ }
+
+ assert(l > 0);
+
+ if (!(buf = malloc(l))) {
+ log_error("Failed to allocate buffer: %m");
+ r = -errno;
+ goto out;
+ }
+
+ if ((k = read(s->inotify_fd, buf, l)) < 0) {
+ log_error("Failed to read inotify event: %m");
+ r = -errno;
+ goto out;
+ }
+
+ e = (struct inotify_event*) buf;
+
+ while (k > 0) {
+ size_t step;
+
+ if (s->type == PATH_CHANGED && s->primary_wd == e->wd)
+ r = 1;
+
+ step = sizeof(struct inotify_event) + e->len;
+ assert(step <= (size_t) k);
+
+ e = (struct inotify_event*) ((uint8_t*) e + step);
+ k -= step;
+ }
+out:
+ free(buf);
+ return r;
+}
+
+static bool pathspec_check_good(PathSpec *s, bool initial) {
+ bool good = false;
+
+ switch (s->type) {
+
+ case PATH_EXISTS:
+ good = access(s->path, F_OK) >= 0;
+ break;
+
+ case PATH_EXISTS_GLOB:
+ good = glob_exists(s->path) > 0;
+ break;
+
+ case PATH_DIRECTORY_NOT_EMPTY: {
+ int k;
+
+ k = dir_is_empty(s->path);
+ good = !(k == -ENOENT || k > 0);
+ break;
+ }
+
+ case PATH_CHANGED: {
+ bool b;
+
+ b = access(s->path, F_OK) >= 0;
+ good = !initial && b != s->previous_exists;
+ s->previous_exists = b;
+ break;
+ }
+
+ default:
+ ;
+ }
+
+ return good;
+}
+
+static bool pathspec_startswith(PathSpec *s, const char *what) {
+ return path_startswith(s->path, what);
+}
+
+static void pathspec_mkdir(PathSpec *s, mode_t mode) {
+ int r;
+
+ if (s->type == PATH_EXISTS || s->type == PATH_EXISTS_GLOB)
+ return;
+
+ if ((r = mkdir_p(s->path, mode)) < 0)
+ log_warning("mkdir(%s) failed: %s", s->path, strerror(-r));
+}
+
+static void pathspec_dump(PathSpec *s, FILE *f, const char *prefix) {
+ fprintf(f,
+ "%s%s: %s\n",
+ prefix,
+ path_type_to_string(s->type),
+ s->path);
+}
+
+void pathspec_done(PathSpec *s) {
+ assert(s->inotify_fd == -1);
+ free(s->path);
+}
+
+static void path_init(Unit *u) {
+ Path *p = PATH(u);
+
+ assert(u);
+ assert(u->meta.load_state == UNIT_STUB);
+
+ p->directory_mode = 0755;
+}
+
static void path_done(Unit *u) {
Path *p = PATH(u);
PathSpec *s;
assert(p);
while ((s = p->specs)) {
- path_unwatch_one(p, s);
+ pathspec_unwatch(s, u);
LIST_REMOVE(PathSpec, spec, p->specs, s);
- free(s->path);
+ pathspec_done(s);
free(s);
}
}
LIST_FOREACH(spec, s, p->specs) {
- if (!path_startswith(s->path, m->where))
+ if (!pathspec_startswith(s, m->where))
continue;
if ((r = unit_add_two_dependencies(UNIT(p), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
prefix, p->directory_mode);
LIST_FOREACH(spec, s, p->specs)
- fprintf(f,
- "%s%s: %s\n",
- prefix,
- path_type_to_string(s->type),
- s->path);
-}
-
-static int path_watch_one(Path *p, PathSpec *s) {
- static const int flags_table[_PATH_TYPE_MAX] = {
- [PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
- [PATH_EXISTS_GLOB] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
- [PATH_CHANGED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO,
- [PATH_DIRECTORY_NOT_EMPTY] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CREATE|IN_MOVED_TO
- };
-
- bool exists = false;
- char *k, *slash;
- int r;
-
- assert(p);
- assert(s);
-
- path_unwatch_one(p, s);
-
- if (!(k = strdup(s->path)))
- return -ENOMEM;
-
- if ((s->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC)) < 0) {
- r = -errno;
- goto fail;
- }
-
- if (unit_watch_fd(UNIT(p), s->inotify_fd, EPOLLIN, &s->watch) < 0) {
- r = -errno;
- goto fail;
- }
-
- if ((s->primary_wd = inotify_add_watch(s->inotify_fd, k, flags_table[s->type])) >= 0)
- exists = true;
-
- do {
- int flags;
-
- /* This assumes the path was passed through path_kill_slashes()! */
- if (!(slash = strrchr(k, '/')))
- break;
-
- /* Trim the path at the last slash. Keep the slash if it's the root dir. */
- slash[slash == k] = 0;
-
- flags = IN_MOVE_SELF;
- if (!exists)
- flags |= IN_DELETE_SELF | IN_ATTRIB | IN_CREATE | IN_MOVED_TO;
-
- if (inotify_add_watch(s->inotify_fd, k, flags) >= 0)
- exists = true;
- } while (slash != k);
-
- return 0;
-
-fail:
- free(k);
-
- path_unwatch_one(p, s);
- return r;
+ pathspec_dump(s, f, prefix);
}
static void path_unwatch(Path *p) {
assert(p);
LIST_FOREACH(spec, s, p->specs)
- path_unwatch_one(p, s);
+ pathspec_unwatch(s, UNIT(p));
}
static int path_watch(Path *p) {
assert(p);
LIST_FOREACH(spec, s, p->specs)
- if ((r = path_watch_one(p, s)) < 0)
+ if ((r = pathspec_watch(s, UNIT(p))) < 0)
return r;
return 0;
assert(p);
LIST_FOREACH(spec, s, p->specs) {
-
- switch (s->type) {
-
- case PATH_EXISTS:
- good = access(s->path, F_OK) >= 0;
- break;
-
- case PATH_EXISTS_GLOB:
- good = glob_exists(s->path) > 0;
- break;
-
- case PATH_DIRECTORY_NOT_EMPTY: {
- int k;
-
- k = dir_is_empty(s->path);
- good = !(k == -ENOENT || k > 0);
- break;
- }
-
- case PATH_CHANGED: {
- bool b;
-
- b = access(s->path, F_OK) >= 0;
- good = !initial && b != s->previous_exists;
- s->previous_exists = b;
- break;
- }
-
- default:
- ;
- }
+ good = pathspec_check_good(s, initial);
if (good)
break;
if (!p->make_directory)
return;
- LIST_FOREACH(spec, s, p->specs) {
- int r;
-
- if (s->type == PATH_EXISTS || s->type == PATH_EXISTS_GLOB)
- continue;
-
- if ((r = mkdir_p(s->path, p->directory_mode)) < 0)
- log_warning("mkdir(%s) failed: %s", s->path, strerror(-r));
- }
+ LIST_FOREACH(spec, s, p->specs)
+ pathspec_mkdir(s, p->directory_mode);
}
static int path_start(Unit *u) {
static void path_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
Path *p = PATH(u);
- int l;
- ssize_t k;
- uint8_t *buf = NULL;
- struct inotify_event *e;
PathSpec *s;
- bool changed;
+ int changed;
assert(p);
assert(fd >= 0);
/* log_debug("inotify wakeup on %s.", u->meta.id); */
- if (events != EPOLLIN) {
- log_error("Got Invalid poll event on inotify.");
- goto fail;
- }
-
LIST_FOREACH(spec, s, p->specs)
- if (s->inotify_fd == fd)
+ if (pathspec_owns_inotify_fd(s, fd))
break;
if (!s) {
goto fail;
}
- if (ioctl(fd, FIONREAD, &l) < 0) {
- log_error("FIONREAD failed: %m");
- goto fail;
- }
-
- assert(l > 0);
-
- if (!(buf = malloc(l))) {
- log_error("Failed to allocate buffer: %s", strerror(ENOMEM));
- goto fail;
- }
-
- if ((k = read(fd, buf, l)) < 0) {
- log_error("Failed to read inotify event: %m");
+ changed = pathspec_fd_event(s, events);
+ if (changed < 0)
goto fail;
- }
/* If we are already running, then remember that one event was
* dispatched so that we restart the service only if something
* actually changed on disk */
p->inotify_triggered = true;
- e = (struct inotify_event*) buf;
-
- changed = false;
- while (k > 0) {
- size_t step;
-
- if (s->type == PATH_CHANGED && s->primary_wd == e->wd)
- changed = true;
-
- step = sizeof(struct inotify_event) + e->len;
- assert(step <= (size_t) k);
-
- e = (struct inotify_event*) ((uint8_t*) e + step);
- k -= step;
- }
-
if (changed)
path_enter_running(p);
else
path_enter_waiting(p, false, true);
- free(buf);
-
return;
fail:
- free(buf);
path_enter_dead(p, false);
}
~ianmdlvl / elogind.git / blobdiff