external/opal-prd/module.c

/* Copyright 2015 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.
 * See the License for the specific language governing permissions and
 * imitations under the License.
 */

#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <sys/types.h>
#include <sys/wait.h>

#include "module.h"
#include "opal-prd.h"

int insert_module(const char *module)
{
	int status;
	pid_t pid;

	pid = fork();
	if (!pid) {
		execlp("modprobe", "modprobe", module, NULL);
		err(EXIT_FAILURE, "Failed to run modprobe");
	}

	pid = waitpid(pid, &status, 0);
	if (pid < 0) {
		pr_log(LOG_ERR, "KMOD: waitpid failed for "
				"modprobe process: %m");
		return -1;
	}

	if (!WIFEXITED(status)) {
		pr_log(LOG_WARNING, "KMOD: modprobe %s: process didn't "
				"exit cleanly", module);
		return -1;
	}

	if (WEXITSTATUS(status) != 0) {
		pr_log(LOG_WARNING, "KMOD: modprobe %s failed, status %d",
				module, WEXITSTATUS(status));
		return -1;
	}

	return 0;
}