sys/arch/mvme68k/stand/libsa/parse_args.c

   1 /*      $NetBSD: parse_args.c,v 1.7.24.4 2005/11/10 13:57:53 skrll Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1995 Theo de Raadt
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/reboot.h>
  31 #include <sys/disklabel.h>
  32 #include <machine/prom.h>
  33 #include <sys/boot_flag.h>
  34
  35 #include <lib/libsa/stand.h>
  36 #include "libsa.h"
  37
  38 #define KERNEL_NAME "netbsd"
  39
  40 void
  41 parse_args(char **filep, int *flagp, int *partp)
  42 {
  43         char *name = KERNEL_NAME, *ptr;
  44         int howto = 0, part = 0;
  45         char c;
  46
  47         if (bugargs.arg_start != bugargs.arg_end) {
  48                 ptr = bugargs.arg_start;
  49                 while ((c = *ptr)) {
  50                         while (c == ' ')
  51                                 c = *++ptr;
  52                         if (c == '\0')
  53                                 return;
  54                         if (c != '-') {
  55                                 if (ptr[1] == ':') {
  56                                         part = (int) (*ptr - 'A');
  57                                         if (part >= MAXPARTITIONS)
  58                                                 part -= 0x20;
  59                                         if (part < 0 || part >= MAXPARTITIONS)
  60                                                 part = 0;
  61                                         if (ptr[2] == ' ' || ptr[2] == '\0') {
  62                                                 ptr += 2;
  63                                                 continue;
  64                                         }
  65                                         name = &(ptr[2]);
  66                                 } else
  67                                         name = ptr;
  68                                 while ((c = *++ptr) && c != ' ')
  69                                         ;
  70                                 if (c)
  71                                         *ptr++ = 0;
  72                                 continue;
  73                         }
  74                         while ((c = *++ptr) && c != ' ')
  75                                 BOOT_FLAG(c, howto);
  76                 }
  77         }
  78         *flagp = howto;
  79         *filep = name;
  80         *partp = part;
  81 }