1 /* $NetBSD: parseutils.c,v 1.1 1997/09/17 17:13:03 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1997 5 * Matthias Drochner. All rights reserved. 6 * Copyright (c) 1996, 1997 7 * Perry E. Metzger. All rights reserved. 8 * Copyright (c) 1997 9 * Jason R. Thorpe. All rights reserved 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgements: 21 * This product includes software developed for the NetBSD Project 22 * by Matthias Drochner. 23 * This product includes software developed for the NetBSD Project 24 * by Perry E. Metzger. 25 * 4. The names of the authors may not be used to endorse or promote products 26 * derived from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 29 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 30 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 31 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 32 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 33 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 37 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <lib/libkern/libkern.h> 41 #include <lib/libsa/stand.h> 42 43 #include "libi386.h" 44 45 /* 46 * chops the head from the arguments and returns the arguments if any, 47 * or possibly an empty string. 48 */ 49 char * 50 gettrailer(arg) 51 char *arg; 52 { 53 char *options; 54 55 if ((options = strchr(arg, ' ')) == NULL) 56 return (""); 57 else 58 *options++ = '\0'; 59 60 /* trim leading blanks */ 61 while (*options && *options == ' ') 62 options++; 63 64 return (options); 65 } 66 67 int 68 parseopts(opts, howto) 69 char *opts; 70 int *howto; 71 { 72 int r, tmpopt = 0; 73 74 opts++; /* skip - */ 75 while (*opts && *opts != ' ') { 76 r = netbsd_opt(*opts); 77 if (r == -1) { 78 printf("-%c: unknown flag\n", *opts); 79 command_help(NULL); 80 return(0); 81 } 82 tmpopt |= r; 83 opts++; 84 } 85 86 *howto = tmpopt; 87 return(1); 88 } 89 90 int 91 parseboot(arg, filename, howto) 92 char *arg; 93 char **filename; 94 int *howto; 95 { 96 char *opts = NULL; 97 98 *filename = 0; 99 *howto = 0; 100 101 /* if there were no arguments */ 102 if (!*arg) 103 return(1); 104 105 /* format is... */ 106 /* [[xxNx:]filename] [-adrs] */ 107 108 /* check for just args */ 109 if (arg[0] == '-') 110 opts = arg; 111 else { 112 /* there's a file name */ 113 *filename = arg; 114 115 opts = gettrailer(arg); 116 if (!*opts) 117 opts = NULL; 118 else if (*opts != '-') { 119 printf("invalid arguments\n"); 120 command_help(NULL); 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