1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2 #pragma once
3 
4 #include <inttypes.h>
5 #include <limits.h>
6 #include <stddef.h>
7 #include <sys/inotify.h>
8 
9 #include "log.h"
10 
11 #define INOTIFY_EVENT_MAX (offsetof(struct inotify_event, name) + NAME_MAX + 1)
12 
13 #define _FOREACH_INOTIFY_EVENT(e, buffer, sz, log_level, start, end)    \
14         for (struct inotify_event                                       \
15                      *start = &((buffer).ev),                           \
16                      *end = (struct inotify_event*) ((uint8_t*) start + (sz)), \
17                      *e = start;                                        \
18              (size_t) ((uint8_t*) end - (uint8_t*) e) >= sizeof(struct inotify_event) && \
19              ((size_t) ((uint8_t*) end - (uint8_t*) e) >= sizeof(struct inotify_event) + e->len || \
20               (log_full(log_level, "Received invalid inotify event, ignoring."), false)); \
21              e = (struct inotify_event*) ((uint8_t*) e + sizeof(struct inotify_event) + e->len))
22 
23 #define _FOREACH_INOTIFY_EVENT_FULL(e, buffer, sz, log_level)           \
24         _FOREACH_INOTIFY_EVENT(e, buffer, sz, log_level, UNIQ_T(start, UNIQ), UNIQ_T(end, UNIQ))
25 
26 #define FOREACH_INOTIFY_EVENT(e, buffer, sz)                    \
27         _FOREACH_INOTIFY_EVENT_FULL(e, buffer, sz, LOG_DEBUG)
28 
29 #define FOREACH_INOTIFY_EVENT_WARN(e, buffer, sz)               \
30         _FOREACH_INOTIFY_EVENT_FULL(e, buffer, sz, LOG_WARNING)
31 
32 union inotify_event_buffer {
33         struct inotify_event ev;
34         uint8_t raw[INOTIFY_EVENT_MAX];
35 };
36 
37 int inotify_add_watch_fd(int fd, int what, uint32_t mask);
38 int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask);
39