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parse_args.c revision 1.1 
      1 /*	$NetBSD: parse_args.c,v 1.1 2002/02/27 21:02:27 scw 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  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed under OpenBSD by
     17  *	Theo de Raadt for Willowglen Singapore.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  */
     34 
     35 #include <sys/param.h>
     36 #include <sys/reboot.h>
     37 #include <sys/disklabel.h>
     38 #include <sys/boot_flag.h>
     39 
     40 #include "stand.h"
     41 #include "libsa.h"
     42 
     43 #define KERNEL_NAME "netbsd"
     44 
     45 void
     46 parse_args(astart, aend, filep, flagp, partp)
     47 	char *astart;
     48 	const char *aend;
     49 	const char **filep;
     50 	int *flagp;
     51 	int *partp;
     52 {
     53 	const char *name = KERNEL_NAME;
     54 	char *ptr;
     55 	int howto = 0, part = 0;
     56 	char c;
     57 
     58 	if (astart != aend) {
     59 		ptr = astart;
     60 		while ((c = *ptr)) {
     61 			while (c == ' ')
     62 				c = *++ptr;
     63 			if (c == '\0')
     64 				return;
     65 			if (c != '-') {
     66 				if (ptr[1] == ':') {
     67 					part = (int) (*ptr - 'A');
     68 					if (part >= MAXPARTITIONS)
     69 						part -= 0x20;
     70 					if (part < 0 || part >= MAXPARTITIONS)
     71 						part = 0;
     72 					if (ptr[2] == ' ' || ptr[2] == '\0') {
     73 						ptr += 2;
     74 						continue;
     75 					}
     76 					name = &(ptr[2]);
     77 				} else
     78 					name = ptr;
     79 				while ((c = *++ptr) && c != ' ')
     80 					;
     81 				if (c)
     82 					*ptr++ = 0;
     83 				continue;
     84 			}
     85 			while ((c = *++ptr) && c != ' ')
     86 				BOOT_FLAG(c, howto);
     87 		}
     88 	}
     89 	*flagp = howto;
     90 	*filep = name;
     91 	*partp = part;
     92 }
     93