linux – 获取Inotify以正确发出IN_UNMOUNT事件

paul@imaskar ~ $inotifywait -r /storage/test/ -m
Setting up watches.  Beware: since -r was given,this may take a while!
Watches established.
/storage/test/ CREATE,ISDIR a
/storage/test/ OPEN,ISDIR a
/storage/test/ CLOSE_NowRITE,CLOSE,ISDIR a
/storage/test/ DELETE,ISDIR a
/storage/test/a/ DELETE_SELF 
/storage/test/a/ IGNORED 
/storage/test/ IGNORED

基本上会发生什么是它会拾取所有其他事件,如创建,打开等……但是当我卸载/ storage / test /它会为它创建的所有手表发出一个IGNORED,但它永远不会发出UNMOUNT活动……

因此,我似乎无法获得IN_UNMOUNT事件,但我读过的所有inotify文档都表示,当卸载受监视的文件/目录后备存储时,内核将向事件添加IN_UNMOUNT位标志…

这是一个来自-Inotify patch的简单C代码

#include <stdio.h>
#include <stdlib.h>
#include <sys/inotify.h>

int main(int argc,char **argv)
{
        char buf[1024];
        struct inotify_event *ie;
        char *p;
        int i;
        ssize_t l;

        p = argv[1];
        i = inotify_init();
        inotify_add_watch(i,p,~0);

        l = read(i,buf,sizeof(buf));
        printf("read %d bytes\n",l);
        ie = (struct inotify_event *) buf;
        printf("event mask: %x\n",ie->mask);
    return 0;
}

无论如何,我做了以下步骤：

gcc -oinotify inotify.c
mkdir mnt
sudo mount -ttmpfs none mnt
mkdir mnt/d
./inotify mnt/d/

# Different shell
sudo umount mnt

最后这是它发出的东西

read 16 bytes
event mask: 8000

所以在这个时候我不确定问题是在代码中还是其他什么？