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      1 /*	$NetBSD: devopen.c,v 1.3 2006/04/05 21:30:29 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 }
     72