1 /* $NetBSD: parse_args.c,v 1.4 2009/03/14 15:36:11 dsl 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 <sys/boot_flag.h>
33
34 #include "stand.h"
35 #include "libsa.h"
36
37 #define KERNEL_NAME "netbsd"
38
39 void
parse_args(char * astart,const char * aend,const char ** filep,int * flagp,int * partp)40 parse_args(char *astart, const char *aend, const char **filep, int *flagp, int *partp)
41 {
42 const char *name = KERNEL_NAME;
43 char *ptr;
44 int howto = 0, part = 0;
45 char c;
46
47 if (astart != aend) {
48 ptr = astart;
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