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parse_args.c revision 1.11 
      1 /*	$NetBSD: parse_args.c,v 1.11 2005/12/11 12:18:19 christos 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 }
     82