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pack_dev.c

/**   $MirOS: src/usr.sbin/makefs/nbsrc/sbin/mknod/pack_dev.c,v 1.4 2008/10/31 21:24:25 tg Exp $ */
/*    $NetBSD: pack_dev.c,v 1.9 2008/04/28 20:23:09 martin Exp $  */

/*-
 * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if !defined(lint)
__RCSID("$NetBSD: pack_dev.c,v 1.9 2008/04/28 20:23:09 martin Exp $");
__IDSTRING(mbsdid, "$MirOS: src/usr.sbin/makefs/nbsrc/sbin/mknod/pack_dev.c,v 1.4 2008/10/31 21:24:25 tg Exp $");
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pack_dev.h"

static      pack_t      pack_netbsd;
static      pack_t      pack_freebsd;
static      pack_t      pack_8_8;
static      pack_t      pack_12_20;
static      pack_t      pack_14_18;
static      pack_t      pack_8_24;
static      pack_t      pack_bsdos;
static      int   compare_format(const void *, const void *);

static const char iMajorError[] = "invalid major number";
static const char iMinorError[] = "invalid minor number";
static const char tooManyFields[] = "too many fields for format";

      /* exported */
portdev_t
pack_native(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev(numbers[0], numbers[1]);
            if ((u_long)major(dev) != numbers[0])
                  *error = iMajorError;
            else if (minor(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


static portdev_t
pack_netbsd(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_netbsd(numbers[0], numbers[1]);
            if (major_netbsd(dev) != numbers[0])
                  *error = iMajorError;
            else if (minor_netbsd(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


#define     major_freebsd(x)  ((uint32_t)(((x) & 0x0000ff00) >> 8))
#define     minor_freebsd(x)  ((uint32_t)(((x) & 0xffff00ff) >> 0))
#define     makedev_freebsd(x,y)    ((portdev_t)((((x) << 8) & 0x0000ff00) | \
                               (((y) << 0) & 0xffff00ff)))

static portdev_t
pack_freebsd(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_freebsd(numbers[0], numbers[1]);
            if (major_freebsd(dev) != numbers[0])
                  *error = iMajorError;
            if (minor_freebsd(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


#define     major_8_8(x)            ((uint32_t)(((x) & 0x0000ff00) >> 8))
#define     minor_8_8(x)            ((uint32_t)(((x) & 0x000000ff) >> 0))
#define     makedev_8_8(x,y)  ((portdev_t)((((x) << 8) & 0x0000ff00) | \
                               (((y) << 0) & 0x000000ff)))

static portdev_t
pack_8_8(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_8_8(numbers[0], numbers[1]);
            if (major_8_8(dev) != numbers[0])
                  *error = iMajorError;
            if (minor_8_8(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


#define     major_12_20(x)          ((uint32_t)(((x) & 0xfff00000) >> 20))
#define     minor_12_20(x)          ((uint32_t)(((x) & 0x000fffff) >>  0))
#define     makedev_12_20(x,y)      ((portdev_t)((((x) << 20) & 0xfff00000) | \
                               (((y) <<  0) & 0x000fffff)))

static portdev_t
pack_12_20(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_12_20(numbers[0], numbers[1]);
            if (major_12_20(dev) != numbers[0])
                  *error = iMajorError;
            if (minor_12_20(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


#define     major_14_18(x)          ((uint32_t)(((x) & 0xfffc0000) >> 18))
#define     minor_14_18(x)          ((uint32_t)(((x) & 0x0003ffff) >>  0))
#define     makedev_14_18(x,y)      ((portdev_t)((((x) << 18) & 0xfffc0000) | \
                               (((y) <<  0) & 0x0003ffff)))

static portdev_t
pack_14_18(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_14_18(numbers[0], numbers[1]);
            if (major_14_18(dev) != numbers[0])
                  *error = iMajorError;
            if (minor_14_18(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


#define     major_8_24(x)           ((uint32_t)(((x) & 0xff000000) >> 24))
#define     minor_8_24(x)           ((uint32_t)(((x) & 0x00ffffff) >>  0))
#define     makedev_8_24(x,y) ((portdev_t)((((x) << 24) & 0xff000000) | \
                               (((y) <<  0) & 0x00ffffff)))

static portdev_t
pack_8_24(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_8_24(numbers[0], numbers[1]);
            if (major_8_24(dev) != numbers[0])
                  *error = iMajorError;
            if (minor_8_24(dev) != numbers[1])
                  *error = iMinorError;
      } else
            *error = tooManyFields;
      return (dev);
}


#define     major_12_12_8(x)  ((uint32_t)(((x) & 0xfff00000) >> 20))
#define     unit_12_12_8(x)         ((uint32_t)(((x) & 0x000fff00) >>  8))
#define     subunit_12_12_8(x)      ((uint32_t)(((x) & 0x000000ff) >>  0))
#define     makedev_12_12_8(x,y,z)  ((portdev_t)((((x) << 20) & 0xfff00000) | \
                               (((y) <<  8) & 0x000fff00) | \
                               (((z) <<  0) & 0x000000ff)))

static portdev_t
pack_bsdos(int n, u_long numbers[], const char **error)
{
      portdev_t dev = 0;

      if (n == 2) {
            dev = makedev_12_20(numbers[0], numbers[1]);
            if (major_12_20(dev) != numbers[0])
                  *error = iMajorError;
            if (minor_12_20(dev) != numbers[1])
                  *error = iMinorError;
      } else if (n == 3) {
            dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
            if (major_12_12_8(dev) != numbers[0])
                  *error = iMajorError;
            if (unit_12_12_8(dev) != numbers[1])
                  *error = "invalid unit number";
            if (subunit_12_12_8(dev) != numbers[2])
                  *error = "invalid subunit number";
      } else
            *error = tooManyFields;
      return (dev);
}


            /* list of formats and pack functions */
            /* this list must be sorted lexically */
struct format {
      const char  *name;
      pack_t            *pack;
} formats[] = {
      {"386bsd",  pack_8_8},
      {"4bsd",    pack_8_8},
      {"bsdos",   pack_bsdos},
      {"freebsd", pack_freebsd},
      {"hpux",    pack_8_24},
      {"isc",     pack_8_8},
      {"linux",   pack_8_8},
      {"native",  pack_native},
      {"netbsd",  pack_netbsd},
      {"osf1",    pack_12_20},
      {"sco",     pack_8_8},
      {"solaris", pack_14_18},
      {"sunos",   pack_8_8},
      {"svr3",    pack_8_8},
      {"svr4",    pack_14_18},
      {"ultrix",  pack_8_8},
};

static int
compare_format(const void *key, const void *element)
{
      const char        *name;
      const struct format     *format;

      name = key;
      format = element;

      return (strcmp(name, format->name));
}


pack_t *
pack_find(const char *name)
{
      struct format     *format;

      format = bsearch(name, formats,
          sizeof(formats)/sizeof(formats[0]),
          sizeof(formats[0]), compare_format);
      if (format == 0)
            return (NULL);
      return (format->pack);
}

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