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/* helper.h */
#include <sys/inotify.h> /* for 'struct inotify_event' */
#include <limits.h> /* for 'NAME_MAX' */
struct inotify_buffer {
ssize_t len;
ssize_t pos;
char dat[sizeof(struct inotify_event)+NAME_MAX+1];
};
struct inotify_event *inotify_next_event_r(int fd, struct inotify_buffer *buf);
struct inotify_event *inotify_next_event(int fd);
#define INOTIFY_ITERATOR(FD, EVENT) \
struct inotify_event *EVENT = inotify_next_event(FD); \
EVENT != NULL; \
EVENT = inotify_next_event(FD)
#define INOTIFY_ITERATOR_R(FD, EVENT, BUF) \
struct inotify_event *EVENT = inotify_next_event_r(FD, BUF); \
EVENT != NULL; \
EVENT = inotify_next_event_r(FD, BUF)
/* helper.c */
#include <unistd.h> /* for read(3) */
#define EVENT_PTR(BUF) ((struct inotify_event *)&((BUF)->dat[(BUF)->pos]))
#define EVENT_SIZE(BUF) (sizeof(struct inotify_event) + EVENT_PTR(BUF)->len)
struct inotify_event *
inotify_next_event_r(int fd, struct inotify_buffer *buf) {
if ((buf->len - buf->pos > sizeof(struct inotify_event))
&& (buf->len - buf->pos > EVENT_SIZE(buf))) {
buf->pos += EVENT_SIZE(buf);
} else {
do {
buf->len = read(FD, buf->dat, sizeof(buf->dat));
} while (buf->len == 0);
BUF.pos = 0;
if (buf->len < 0) {
return NULL;
}
}
return EVENT_PTR(buf);
}
struct inotify_event *
inotify_next_event(int fd) {
static struct inotify_buffer buf = { 0 };
return inotify_next_event_r(fd, &buf);
}
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