dist/pdisk/pathname.c

   1 /*
   2  * pathname.c -
   3  *
   4  * Written by Eryk Vershen
   5  */
   6
   7 /*
   8  * Copyright 1997,1998 by Apple Computer, Inc.
   9  *              All Rights Reserved
  10  *
  11  * Permission to use, copy, modify, and distribute this software and
  12  * its documentation for any purpose and without fee is hereby granted,
  13  * provided that the above copyright notice appears in all copies and
  14  * that both the copyright notice and this permission notice appear in
  15  * supporting documentation.
  16  *
  17  * APPLE COMPUTER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
  18  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  19  * FOR A PARTICULAR PURPOSE.
  20  *
  21  * IN NO EVENT SHALL APPLE COMPUTER BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
  22  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  23  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
  24  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
  25  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  26  */
  27
  28
  29 // for strncmp()
  30 #include <string.h>
  31
  32 #include "pathname.h"
  33 #include "file_media.h"
  34
  35 #if !defined(__linux__) && !defined(__unix__)
  36 #include "SCSI_media.h"
  37 #include "ATA_media.h"
  38 #endif
  39
  40
  41 /*
  42  * Defines
  43  */
  44
  45
  46 /*
  47  * Types
  48  */
  49
  50
  51 /*
  52  * Global Constants
  53  */
  54
  55
  56 /*
  57  * Global Variables
  58  */
  59
  60
  61 /*
  62  * Forward declarations
  63  */
  64
  65
  66 /*
  67  * Routines
  68  */
  69
  70 /*
  71  * Note that open_pathname_as_media() and get_linux_name() have almost
  72  * identical structures.  If one changes the other must also!
  73  */
  74 MEDIA
  75 open_pathname_as_media(char *path, int oflag)
  76 {
  77     MEDIA       m = 0;
  78 #if !defined(__linux__) && !defined(__unix__)
  79     long        id;
  80     long        bus;
  81
  82     if (strncmp("/dev/", path, 5) == 0) {
  83         if (strncmp("/dev/scsi", path, 9) == 0) {
  84             if (path[9] >= '0' && path[9] <= '7' && path[10] == 0) {
  85                 // scsi[0-7]
  86                 id = path[9] - '0';
  87                 m = open_old_scsi_as_media(id);
  88             } else if (path[9] >= '0' && path[9] <= '7' && path[10] == '.'
  89                     && path[11] >= '0' && path[11] <= '7' && path[12] == 0) {
  90                 // scsi[0-7].[0-7]
  91                 id = path[11] - '0';
  92                 bus = path[9] - '0';
  93                 m = open_scsi_as_media(bus, id);
  94             }
  95         } else if (strncmp("/dev/ata", path, 8) == 0
  96                 || strncmp("/dev/ide", path, 8) == 0) {
  97             if (path[8] >= '0' && path[8] <= '7' && path[9] == 0) {
  98                 // ata[0-7], ide[0-7]
  99                 bus = path[8] - '0';
 100                 m = open_ata_as_media(bus, 0);
 101             } else if (path[8] >= '0' && path[8] <= '7' && path[9] == '.'
 102                     && path[10] >= '0' && path[10] <= '1' && path[11] == 0) {
 103                 // ata[0-7].[0-1], ide[0-7].[0-1]
 104                 id = path[10] - '0';
 105                 bus = path[8] - '0';
 106                 m = open_ata_as_media(bus, id);
 107             }
 108         } else if (strncmp("/dev/sd", path, 7) == 0) {
 109             if (path[7] >= 'a' && path[7] <= 'z' && path[8] == 0) {
 110                 // sd[a-z]
 111                 id = path[7] - 'a';
 112                 m = open_linux_scsi_as_media(id, 0);
 113             } else if (path[7] >= 'a' && path[7] <= 'z' && path[8] == '.'
 114                     && path[9] >= 'a' && path[9] <= 'z' && path[10] == 0) {
 115                 // sd[a-z][a-z]
 116                 bus = path[7] - 'a';
 117                 id = path[9] - 'a';
 118                 id += bus * 26;
 119                 m = open_linux_scsi_as_media(id, 0);
 120             }
 121         } else if (strncmp("/dev/scd", path, 8) == 0) {
 122             if (path[8] >= '0' && path[8] <= '9' && path[9] == 0) {
 123                 // scd[0-9]
 124                 id = path[8] - '0';
 125                 m = open_linux_scsi_as_media(id, 1);
 126             }
 127         } else if (strncmp("/dev/hd", path, 7) == 0) {
 128             if (path[7] >= 'a' && path[7] <= 'z' && path[8] == 0) {
 129                 // hd[a-z]
 130                 id = path[7] - 'a';
 131                 m = open_linux_ata_as_media(id);
 132             }
 133         }
 134     } else
 135 #endif
 136
 137     {
 138         m = open_file_as_media(path, oflag);
 139     }
 140     return m;
 141 }
 142
 143
 144 char *
 145 get_linux_name(char *path)
 146 {
 147     char        *result = 0;
 148 #if !defined(__linux__) && !defined(__unix__)
 149     long        id;
 150     long        bus;
 151
 152     if (strncmp("/dev/", path, 5) == 0) {
 153         if (strncmp("/dev/scsi", path, 9) == 0) {
 154             if (path[9] >= '0' && path[9] <= '7' && path[10] == 0) {
 155                 /* old scsi */
 156                 // scsi[0-7]
 157                 id = path[9] - '0';
 158                 result = linux_old_scsi_name(id);
 159             } else if (path[9] >= '0' && path[9] <= '7' && path[10] == '.'
 160                     && path[11] >= '0' && path[11] <= '7' && path[12] == 0) {
 161                 /* new scsi */
 162                 // scsi[0-7].[0-7]
 163                 id = path[11] - '0';
 164                 bus = path[9] - '0';
 165                 result = linux_scsi_name(bus, id);
 166             }
 167         } else if (strncmp("/dev/ata", path, 8) == 0
 168                 || strncmp("/dev/ide", path, 8) == 0) {
 169             if (path[8] >= '0' && path[8] <= '7' && path[9] == 0) {
 170                 /* ata/ide - master device */
 171                 // ata[0-7], ide[0-7]
 172                 bus = path[8] - '0';
 173                 result = linux_ata_name(bus, 0);
 174             } else if (path[8] >= '0' && path[8] <= '7' && path[9] == '.'
 175                     && path[10] >= '0' && path[10] <= '1' && path[11] == 0) {
 176                 /* ata/ide */
 177                 // ata[0-7].[0-1], ide[0-7].[0-1]
 178                 id = path[10] - '0';
 179                 bus = path[8] - '0';
 180                 result = linux_ata_name(bus, id);
 181             }
 182         }
 183     }
 184 #endif
 185
 186     return result;
 187 }
 188
 189
 190 MEDIA_ITERATOR
 191 first_media_kind(long *state)
 192 {
 193     *state = 0;
 194     return next_media_kind(state);
 195 }
 196
 197
 198 MEDIA_ITERATOR
 199 next_media_kind(long *state)
 200 {
 201     MEDIA_ITERATOR result;
 202     long ix;
 203
 204     result = 0;
 205     ix = *state;
 206
 207     switch (ix) {
 208     case 0:
 209 #if defined(__linux__) || defined(__unix__)
 210         result = create_file_iterator();
 211 #endif
 212         ix = 1;
 213         if (result != 0) {
 214                 break;
 215         }
 216         /* fall through to next interface */
 217
 218     case 1:
 219 #if !defined(__linux__) && !defined(__unix__)
 220         result = create_ata_iterator();
 221 #endif
 222         ix = 2;
 223         if (result != 0) {
 224                 break;
 225         }
 226         /* fall through to next interface */
 227
 228     case 2:
 229 #if !defined(__linux__) && !defined(__unix__)
 230         result = create_scsi_iterator();
 231 #endif
 232         ix = 3;
 233         if (result != 0) {
 234                 break;
 235         }
 236         /* fall through to next interface */
 237
 238     case 3:
 239     default:
 240         break;
 241     }
 242
 243     *state = ix;
 244     return result;
 245 }
 246
 247