source: mainline/uspace/app/tester/hw/misc/virtchar1.c@ 0bff73a

/*
 * Copyright (c) 2010 Vojtech Horky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup tester
 * @brief Test the virtual char driver
 * @{
 */
/**
 * @file
 */

#include <inttypes.h>
#include <errno.h>
#include <str_error.h>
#include <sys/types.h>
#include <async.h>
#include <device/char.h>
#include <str.h>
#include <vfs/vfs.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <device/char.h>
#include "../../tester.h"

#define DEVICE_PATH "/dev/devices/\\virt\\null"
#define BUFFER_SIZE 64

const char *test_virtchar1(void)
{
        TPRINTF("Opening %s...\n", DEVICE_PATH);
        int fd = open(DEVICE_PATH, O_RDONLY);
        if (fd < 0) {
                TPRINTF(" ...error: %s\n", str_error(fd));
                if (fd == ENOENT) {
                        TPRINTF(" (error was ENOENT: " \
                            "have you compiled test drivers?)\n");
                }
                return "Failed opening " DEVICE_PATH " for reading";
        }
        
        TPRINTF(" ...file handle %d\n", fd);

        TPRINTF("Asking for phone...\n");
        int phone = fd_phone(fd);
        if (phone < 0) {
                close(fd);
                TPRINTF(" ...error: %s\n", str_error(phone));
                return "Failed to get phone to device";
        }
        TPRINTF(" ...phone is %d\n", phone);
        
        TPRINTF("Will try to read...\n");
        size_t i;
        char buffer[BUFFER_SIZE];
        read_dev(phone, buffer, BUFFER_SIZE);
        TPRINTF(" ...verifying that we read zeroes only...\n");
        for (i = 0; i < BUFFER_SIZE; i++) {
                if (buffer[i] != 0) {
                        return "Not all bytes are zeroes";
                }
        }
        TPRINTF(" ...data read okay\n");
        
        /* Clean-up. */
        TPRINTF("Closing phones and file descriptors");
        ipc_hangup(phone);
        close(fd);
        
        return NULL;
}

/** @}
 */