/*      $NetBSD: devopen.c,v 1.3 2005/12/11 12:16:41 christos Exp $     */

/*-
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
*      @(#)devopen.c   8.1 (Berkeley) 6/10/93
*/

#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>

/*
* Decode the string 'fname', open the device and return the remaining
* file name if any.
*/
int
devopen(struct open_file *f, const char *fname, char **file)
{
       int error;
       char namebuf[128];
       char devtype[16];
       const char *cp;
       char *ncp;
#if !defined(LIBSA_SINGLE_DEVICE)
       int i;
       struct devsw *dp;
#endif

       cp = fname;
       ncp = (char *)fname;

#ifdef arc
       /*
        * Look for "fdisk" (floppy disk?) or "rdisk" (rigid disk?) strings
        * in OSLOADPARTITION like the following:
        *  'scsi(0)disk(0)rdisk()partition(2)netbsd'   (jazzio scsi disk)
        *  'scsi(1)cdrom(1)fdisk()netbsd.arc'          (jazzio scsi cdrom)
        *  'multi(0)disk(0)fdisk()netbsd'              (floppy disk)
        *  'eisa(0)scsi(0)disk(0)rdisk()partition(2)netbsd' (eisa raid)
        * etc. (the file can either be a relative path or an abosolute path).
        */
       for (;;) {
               if (strncmp(cp, "rdisk", 5) == 0 ||
                   strncmp(cp, "fdisk", 5) == 0) {
                       strcpy(devtype, "disk");
                       break;
               }
               while (*ncp && *ncp++ != ')')
                       ;
               if (*ncp)
                       cp = ncp;
               else
                       return ENXIO;
       }
#endif
#ifdef sgimips
       /*
        * If device starts with a PCI bus specifier, skip past it so the
        * device-matching code below gets the actual device type. Leave
        * fname as is, since it'll be passed back to ARCS to open the
        * device.  This is necessary for the IP32.
        */
       if (strncmp(cp, "pci", 3) == 0) {
               while (*ncp && *ncp++ != ')')
                       ;
               if (*ncp)
                       cp = ncp;
       }

       /*
        * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
        * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
        * or an abosolute path).
        */
       if (strncmp(cp, "scsi", 4) == 0) {
               strcpy(devtype, "disk");
       } else if (strncmp(cp, "dksc", 4) == 0) {
               strcpy(devtype, "disk");
       } else
               return ENXIO;
#endif

       while (ncp != NULL && *ncp != 0) {
               while (*ncp && *ncp++ != ')')
                       ;
               if (*ncp)
                       cp = ncp;
       }

       strncpy(namebuf, fname, sizeof(namebuf));
       namebuf[cp - fname] = 0;

       printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
#ifdef LIBSA_SINGLE_DEVICE
       error = DEV_OPEN(dp)(f, fname);
#else /* !LIBSA_SINGLE_DEVICE */
       for (dp = devsw, i = 0; i < ndevs; dp++, i++)
               if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
                       goto found;
       printf("Unknown device '%s'\nKnown devices are:", devtype);
       for (dp = devsw, i = 0; i < ndevs; dp++, i++)
               if (dp->dv_name)
                       printf(" %s", dp->dv_name);
       printf("\n");
       return ENXIO;

found:
       error = (dp->dv_open)(f, namebuf);
#endif /* !LIBSA_SINGLE_DEVICE */
       if (error)
               return error;

#ifndef LIBSA_SINGLE_DEVICE
       f->f_dev = dp;
#endif
       if (file && *cp != '\0')
               *file = (char *)cp;     /* XXX */
       return 0;
}