sys/arch/acorn32/stand/lib/devopen.c

   1 /*      $NetBSD: devopen.c,v 1.2 2006/04/01 19:08:08 bjh21 Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2001, 2006 Ben Harris
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/disklabel.h>
  31 #include <lib/libkern/libkern.h>
  32 #include <lib/libsa/stand.h>
  33 #include <riscosdisk.h>
  34
  35 int
  36 devopen(struct open_file *f, const char *fname, char **file)
  37 {
  38 #ifdef LIBSA_SINGLE_FILESYSTEM
  39
  40         /* We don't support any devices yet. */
  41         f->f_flags |= F_NODEV;
  42         *file = (char *)fname;
  43         return 0;
  44 #else
  45         char *p, *fsname;
  46         int part, drive, err, fslen;
  47
  48         p = strchr(fname, ':');
  49         if (p == NULL || p == fname) return ENOENT;
  50         *file = p + 1;
  51         p--;
  52         if (p == fname) return ENOENT;
  53         if (islower((unsigned char)*p))
  54                 part = *p-- - 'a';
  55         else
  56                 part = RAW_PART;
  57         if (p == fname) return ENOENT;
  58         drive = 0;
  59         while (isdigit((unsigned char)*p) && p >= fname)
  60                 drive = drive * 10 + *p-- - '0';
  61         if (p <= fname) return ENOENT;
  62
  63         fslen = p + 1 - fname;
  64         fsname = alloc(fslen + 1);
  65         memcpy(fsname, fname, fslen);
  66         fsname[fslen] = 0;
  67         err =  rodisk_open(f, fsname, drive, part);
  68         dealloc(fsname, fslen + 1);
  69         return err;
  70 #endif
  71 }