C语言之inotify(二十七)

蔚落 2022-09-12 13:46 150阅读 0赞

#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;
    }