inotify监测实例

 /*************************************************************************
     > File Name: inotify.c
     > 监测一个目录下的文件变化，增加或删除提示
     > Created Time: Thu 21 Sep 2017 02:41:48 PM CST
  ************************************************************************/

 #include <stdio.h>
 #include <sys/inotify.h>
 #include <string.h>
 #include <errno.h>
 #include <fcntl.h>

 int read_process_inotify_fd(int inotify_fd)
 {
     int res;
     char event_buf[];
     int event_size;
     int event_pos = ;
     struct inotify_event *event;
     res = read(inotify_fd, event_buf, sizeof(event_buf));
     if(res < sizeof(struct inotify_event))
     {
         if(errno == EINTR)
         {
             return ;
         }
         printf("can not get event ,%s\n",strerror(errno));
         return -;
     }

     while(res >= (int)sizeof(*event)) {
         event = (struct inotify_event *)(event_buf + event_pos); //指向下一个结构体
         if(event->len) {
             if(event->mask & IN_CREATE) {
                 printf("Add device '%s' due to inotify event\n", event->name);
             } else {
                 printf("Removing device '%s' due to inotify event\n", event->name);
             }
         }
         event_size = sizeof(*event) + event->len;
         res -= event_size;
         event_pos += event_size; //跳转到下一个结构体
     }
     return ;
 }

 int main(int argc ,char **argv)
 {
     int fd;
     if(argc < )
     {
         printf("Usage: %s <dir>\n",argv[]);
         return -;
     }
     // inotify_init
     fd = inotify_init();
     // add watch
     //添加监控：argv[1]监控目录，IN_DELETE|IN_CREATE 监控 创建和删除
     inotify_add_watch(fd, argv[], IN_DELETE|IN_CREATE);
     // read
     while()
     {
         read_process_inotify_fd(fd);
     }
     return ;
 }