2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 abstract the various kernel interfaces to change notify into a
23 single Samba friendly interface
27 #include "system/filesys.h"
28 #include "ntvfs/sysdep/sys_notify.h"
29 #include "lib/events/events.h"
30 #include "dlinklist.h"
33 /* list of registered backends */
34 static struct sys_notify_backend *backends;
35 static uint32_t num_backends;
38 initialise a system change notify backend
40 struct sys_notify_context *sys_notify_context_create(int snum,
42 struct event_context *ev)
44 struct sys_notify_context *ctx;
48 if (num_backends == 0) {
53 ev = event_context_find(mem_ctx);
56 ctx = talloc_zero(mem_ctx, struct sys_notify_context);
63 bname = lp_parm_string(snum, "notify", "backend");
66 bname = backends[0].name;
68 bname = "__unknown__";
72 for (i=0;i<num_backends;i++) {
73 if (strcasecmp(backends[i].name, bname) == 0) {
74 bname = backends[i].name;
80 ctx->notify_watch = NULL;
82 if (i < num_backends) {
83 ctx->notify_watch = backends[i].notify_watch;
92 note that this call must modify the e->filter and e->subdir_filter
93 bits to remove ones handled by this backend. Any remaining bits will
94 be handled by the generic notify layer
96 NTSTATUS sys_notify_watch(struct sys_notify_context *ctx, struct notify_entry *e,
97 sys_notify_callback_t callback, void *private, void **handle)
99 if (!ctx->notify_watch) {
100 return NT_STATUS_INVALID_SYSTEM_SERVICE;
102 return ctx->notify_watch(ctx, e, callback, private, handle);
106 register a notify backend
108 NTSTATUS sys_notify_register(struct sys_notify_backend *backend)
110 struct sys_notify_backend *b;
111 b = talloc_realloc(talloc_autofree_context(), backends,
112 struct sys_notify_backend, num_backends+1);
113 NT_STATUS_HAVE_NO_MEMORY(b);
115 backends[num_backends] = *backend;
120 NTSTATUS sys_notify_init(void)
122 static BOOL initialized = False;
124 init_module_fn static_init[] = STATIC_sys_notify_MODULES;
125 init_module_fn *shared_init;
127 if (initialized) return NT_STATUS_OK;
130 shared_init = load_samba_modules(NULL, "sys_notify");
132 run_init_functions(static_init);
133 run_init_functions(shared_init);
135 talloc_free(shared_init);