1 /* $NetBSD: parseutils.c,v 1.2 2007/11/11 05:20:27 isaki Exp $ */ 2 3 /* 4 * from /sys/arch/i386/lib/parseutils.c 5 * NetBSD: parseutils.c,v 1.3 2000/09/24 12:32:35 jdolecek Exp 6 */ 7 8 /* 9 * Copyright (c) 1996, 1997 10 * Matthias Drochner. All rights reserved. 11 * Copyright (c) 1996, 1997 12 * Perry E. Metzger. All rights reserved. 13 * Copyright (c) 1997 14 * Jason R. Thorpe. All rights reserved 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgements: 26 * This product includes software developed for the NetBSD Project 27 * by Matthias Drochner. 28 * This product includes software developed for the NetBSD Project 29 * by Perry E. Metzger. 30 * 4. The names of the authors may not be used to endorse or promote products 31 * derived from this software without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 34 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 36 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 37 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 38 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 39 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 40 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 41 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 42 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 43 */ 44 45 #include <lib/libkern/libkern.h> 46 #include <lib/libsa/stand.h> 47 #include <sys/boot_flag.h> 48 49 #include "libx68k.h" 50 51 52 /* 53 * chops the head from the arguments and returns the arguments if any, 54 * or possibly an empty string. 55 */ 56 char * 57 gettrailer(char *arg) 58 { 59 char *options; 60 61 if ((options = strchr(arg, ' ')) == NULL) 62 return ""; 63 else 64 *options++ = '\0'; 65 66 /* trim leading blanks */ 67 while (*options && *options == ' ') 68 options++; 69 70 return options; 71 } 72 73 int 74 parseopts(const char *opts, int *howto) 75 { 76 int r, tmpopt = 0; 77 78 opts++; /* skip - */ 79 while (*opts && *opts != ' ') { 80 r = 0; 81 BOOT_FLAG(*opts, r); 82 if (r == 0) { 83 printf("-%c: unknown flag\n", *opts); 84 return 0; 85 } 86 tmpopt |= r; 87 opts++; 88 } 89 90 *howto = tmpopt; 91 return 1; 92 } 93 94 int 95 parseboot(char *arg, char **filename, int *howto) 96 { 97 char *opts = NULL; 98 99 *filename = 0; 100 *howto = 0; 101 102 /* if there were no arguments */ 103 if (!*arg) 104 return 1; 105 106 /* format is... */ 107 /* [[xxNx:]filename] [-adqsv] */ 108 109 /* check for just args */ 110 if (arg[0] == '-') { 111 opts = arg; 112 } else { 113 /* there's a file name */ 114 *filename = arg; 115 116 opts = gettrailer(arg); 117 if (!*opts) { 118 opts = NULL; 119 } else if (*opts != '-') { 120 printf("invalid arguments\n"); 121 return 0; 122 } 123 } 124 125 /* at this point, we have dealt with filenames. */ 126 127 /* now, deal with options */ 128 if (opts) { 129 if (parseopts(opts, howto) == 0) 130 return 0; 131 } 132 133 return 1; 134 } 135