C语言之inotify(二十七)

#include <limits.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/inotify.h>

#define BUF_LEN (10 * (sizeof(struct inotify_event) + NAME_MAX + 1))

static void displayInotifyEvent(struct inotify_event *i){
	printf(" wd =%2d; ", i->wd);
	if(i->cookie > 0)
		printf("cookie =%4d; ", i->cookie);

	printf("mask = %0x \n", i->mask);

	if (i->mask & IN_ACCESS) printf("IN_ACCESS ");
	if (i->mask & IN_ATTRIB) printf("IN_ATTRIB ");
	if (i->mask & IN_CLOSE_NOWRITE) printf("IN_CLOSE_NOWRITE ");
	if (i->mask & IN_CLOSE_WRITE) printf("IN_CLOSE_WRITE ");
	if (i->mask & IN_CREATE) printf("IN_CREATE ");
	if (i->mask & IN_DELETE) printf("IN_DELETE ");
	if (i->mask & IN_DELETE_SELF) printf("IN_DELETE_SELF ");
	if (i->mask & IN_IGNORED) printf("IN_IGNORED ");
	if (i->mask & IN_ISDIR) printf("IN_ISDIR ");
	if (i->mask & IN_MODIFY) printf("IN_MODIFY ");
	if (i->mask & IN_MOVE_SELF) printf("IN_MOVE_SELF ");
	if (i->mask & IN_MOVED_FROM) printf("IN_MOVED_FROM ");
	if (i->mask & IN_MOVED_TO) printf("IN_MOVED_TO ");
	if (i->mask & IN_OPEN) printf("IN_OPEN ");
	if (i->mask & IN_Q_OVERFLOW) printf("IN_Q_OVERFLOW ");
	if (i->mask & IN_UNMOUNT) printf("IN_UNMOUNT ");
	
	printf("\n");

	if (i->len > 0)
    printf(" name = %s\n", i->name);
}

int main(int argc, char *argv[]){
	int inotifyFd, wd, j;
	char buf[BUF_LEN] __attribute__ ((aligned(8)));
	unsigned int numRead;
	char *p;
	struct inotify_event *event;

	if (argc < 2 || strcmp(argv[1], "--help") == 0)
		printf("%s pathname...\n", argv[0]);

	inotifyFd = inotify_init();
	if (inotifyFd == -1)
		perror("inotify_init");

	for (j = 1; j < argc; j++) {
		wd = inotify_add_watch(inotifyFd, argv[j], IN_ALL_EVENTS);
		if(wd == -1)
			perror("inotify_add_watch");

		printf("Watching %s using wd %d\n", argv[j], wd);
	}

	for(;;) {
		numRead = read(inotifyFd, buf, BUF_LEN);
		printf("Read %ld bytes from inotify fd\n", (long) numRead);

		for (p = buf; p < buf + numRead; ) {
			event = (struct inotify_event *) p;
			displayInotifyEvent(event);

			p += sizeof(struct inotify_event) + event->len;
		}
	}
	return 0;
}