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标题: 从linux kernel 调用应用层AP [打印本页]

作者: hjman 时间: 2015-3-20 18:36
标题: 从linux kernel 调用应用层AP
static void argv_cleanup(struct subprocess_info *info)
{
      argv_free(info->argv);
}

char reboot_cmd[128] = "/system/bin/reboot";
int  call_reboot_proc()
{
      int argc;
      char **argv = argv_split(GFP_ATOMIC, reboot_cmd, &argc);
      static char *envp[] = {
            "HOME=/",
            "PATH=/sbin:/bin:/usr/sbin:/usr/bin:/system/bin",
            NULL
      };
      int ret = -ENOMEM;
      struct subprocess_info *info;

      if (argv == NULL) {
            printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
                     __func__, poweroff_cmd);
            goto out;
      }

      info = call_usermodehelper_setup(argv[0], argv, envp, GFP_ATOMIC);
      if (info == NULL) {
            argv_free(argv);
            goto out;
      }

      call_usermodehelper_setfns(info, NULL, argv_cleanup, NULL);

      ret = call_usermodehelper_exec(info, UMH_NO_WAIT);
  out:
      return ret;
}

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