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4408 svoboda 1
/*
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 * Copyright (c) 2009 Jiri Svoboda
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "util.h"
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#include "errors.h"
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#include "entry.h"
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#include "bdd.h"
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#include "cmds.h"
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#include <libblock.h>
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#include <devmap.h>
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#include <errno.h>
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#define BLOCK_SIZE  512
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#define BPR      16
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static const char *cmdname = "bdd";
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/* Dispays help for bdd in various levels */
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void help_cmd_bdd(unsigned int level)
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{
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    static char helpfmt[] =
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        "Usage:  %s <device> [<block_number> [<bytes>]]\n";
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    if (level == HELP_SHORT) {
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        printf("'%s' dump block device contents.\n", cmdname);
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    } else {
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        help_cmd_bdd(HELP_SHORT);
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        printf(helpfmt, cmdname);
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    }
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    return;
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}
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/* Main entry point for bdd, accepts an array of arguments */
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int cmd_bdd(char **argv)
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{
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    unsigned int argc;
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    unsigned int i, j;
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    dev_handle_t handle;
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    block_t *block;
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    uint8_t *blk;
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    size_t size, bytes, rows;
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    int rc;
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    bn_t boff;
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    uint8_t b;
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    /* Count the arguments */
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    for (argc = 0; argv[argc] != NULL; argc ++);
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    if (argc < 2 || argc > 4) {
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        printf("%s - incorrect number of arguments.\n", cmdname);
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        return CMD_FAILURE;
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    }
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    if (argc >= 3)
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        boff = strtol(argv[2], NULL, 0);
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    else
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        boff = 0;
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    if (argc >= 4)
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        size = strtol(argv[3], NULL, 0);
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    else
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        size = 256;
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    rc = devmap_device_get_handle(argv[1], &handle, 0);
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    if (rc != EOK) {
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        printf("Error: could not resolve device `%s'.\n", argv[1]);
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        return CMD_FAILURE;
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    }
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    rc = block_init(handle, BLOCK_SIZE);
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    if (rc != EOK)  {
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        printf("Error: could not init libblock.\n");
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        return CMD_FAILURE;
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    }
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    rc = block_cache_init(handle, BLOCK_SIZE, 2);
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    if (rc != EOK) {
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        printf("Error: could not init block cache.\n");
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        return CMD_FAILURE;
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    }
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    while (size > 0) {
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        block = block_get(handle, boff, 0);
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        blk = (uint8_t *) block->data;
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        bytes = (size < BLOCK_SIZE) ? size : BLOCK_SIZE;
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        rows = (bytes + BPR - 1) / BPR;
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        for (j = 0; j < rows; j++) {
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            for (i = 0; i < BPR; i++) {
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                if (j * BPR + i < bytes)
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                    printf("%02x ", blk[j * BPR + i]);
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                else
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                    printf("   ");
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            }
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            putchar('\t');
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            for (i = 0; i < BPR; i++) {
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                if (j * BPR + i < bytes) {
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                    b = blk[j * BPR + i];
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                    if (b >= 32 && b < 127)
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                        putchar(b);
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                    else
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                        putchar(' ');
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                } else {
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                    putchar(' ');
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                }
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            }
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            putchar('\n');
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        }
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        block_put(block);
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        if (size > rows * BPR)
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            size -= rows * BPR;
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        else
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            size = 0;
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        boff += rows * BPR;
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    }
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    block_fini(handle);
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    return CMD_SUCCESS;
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}