150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <linux/kd.h>
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#include <linux/errno.h>
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#include "includeTest.h"
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int open_block_device(void);
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int block_dev_handle = 0; /* handle to INC test block device */
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int main(int argc, char **argv)
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{
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incdev_cmd_t cmd = { 0, 0 };
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int rc;
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rc = open_block_device();
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if (!rc) {
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block_dev_handle = open(DEVICE_NAME, O_RDWR);
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if (block_dev_handle < 0) {
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printf
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("ERROR: Open of device %s failed %d errno = %d\n",
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DEVICE_NAME, block_dev_handle, errno);
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} else {
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rc = ioctl(block_dev_handle, INCDEV_CMD, &cmd);
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printf("return from ioctl %d \n", rc);
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}
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} else {
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printf("ERROR: Create/open block device failed\n");
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}
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return 0;
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printf("Block Include Test complete.\n");
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}
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int open_block_device()
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{
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dev_t devt;
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struct stat statbuf;
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int rc;
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if (block_dev_handle == 0) {
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/* check for the /dev/ subdir, and create if it does not exist.
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*
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* If devfs is running and mounted on /dev, these checks will all pass,
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* so a new node will not be created.
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*/
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devt = makedev(INCLUDEMAJOR, 0);
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rc = stat(INCLUDE_DEVICE_PATH, &statbuf);
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if (rc) {
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if (errno == ENOENT) {
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/* dev node does not exist. */
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rc = mkdir(INCLUDE_DEVICE_PATH,
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(S_IFDIR | S_IRWXU | S_IRGRP |
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S_IXGRP | S_IROTH | S_IXOTH));
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} else {
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printf("ERROR: Problem with INC dev directory. Error code from stat(
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) is %d\n\n", errno);
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}
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} else {
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if (!(statbuf.st_mode & S_IFDIR)) {
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rc = unlink(INCLUDE_DEVICE_PATH);
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if (!rc) {
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rc = mkdir(INCLUDE_DEVICE_PATH,
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(S_IFDIR | S_IRWXU | S_IRGRP
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| S_IXGRP | S_IROTH |
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S_IXOTH));
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}
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}
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}
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/*
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* Check for the block_device node, and create if it does not
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* exist.
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*/
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rc = stat(DEVICE_NAME, &statbuf);
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if (rc) {
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if (errno == ENOENT) {
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/* dev node does not exist */
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rc = mknod(DEVICE_NAME,
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(S_IFBLK | S_IRUSR | S_IWUSR |
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S_IRGRP | S_IWGRP), devt);
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} else {
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printf
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("ERROR:Problem with block device node directory. Error code form stat() is %d\n\n",
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errno);
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}
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} else {
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/*
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* Device exists. Check to make sure it is for a
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* block device and that it has the right major and minor.
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*/
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if ((!(statbuf.st_mode & S_IFBLK)) ||
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(statbuf.st_rdev != devt)) {
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/* Recreate the dev node. */
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rc = unlink(DEVICE_NAME);
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if (!rc) {
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rc = mknod(DEVICE_NAME,
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(S_IFBLK | S_IRUSR | S_IWUSR
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| S_IRGRP | S_IWGRP), devt);
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}
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}
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}
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}
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return rc;
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}
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