模块移除 命令rmmod 的实现

// rmmod.c

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <fcntl.h>

#include <string.h>

#include <errno.h>

int main(int argc, char *argv[])

{

const char *modname = argv[1];

int ret = -1;

int maxtry = 10;

while (maxtry-- > 0) {

ret = delete_module(modname, O_NONBLOCK | O_EXCL);//sys_delete_module

if (ret < 0 && errno == EAGAIN)

usleep(500000);

else

break;

}

if (ret != 0)

printf("Unable to unload driver module \"%s\": %s\n",

modname, strerror(errno));

}