1 /*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/boot/i386/libi386/bootinfo.c,v 1.35 2003/08/25 23:28:31 obrien Exp $ 27 */ 28 29 #include <stand.h> 30 #include <sys/param.h> 31 #include <sys/reboot.h> 32 #include <sys/boot.h> 33 #include <sys/linker.h> 34 #include "bootstrap.h" 35 #include "libi386.h" 36 #include "btxv86.h" 37 38 int 39 bi_getboothowto(char *kargs) 40 { 41 char *cp; 42 int howto; 43 int active; 44 int i; 45 46 /* Parse kargs */ 47 howto = 0; 48 if (kargs != NULL) { 49 cp = kargs; 50 active = 0; 51 while (*cp != 0) { 52 if (!active && (*cp == '-')) { 53 active = 1; 54 } else if (active) 55 switch (*cp) { 56 case 'a': 57 howto |= RB_ASKNAME; 58 break; 59 case 'C': 60 howto |= RB_CDROM; 61 break; 62 case 'd': 63 howto |= RB_KDB; 64 break; 65 case 'D': 66 /* all available consoles become active */ 67 howto &= ~(RB_MUTE|RB_VIDEO|RB_SERIAL); 68 break; 69 case 'V': 70 howto |= RB_VIDEO; 71 break; 72 case 'm': 73 howto |= RB_MUTE; 74 break; 75 case 'g': 76 howto |= RB_GDB; 77 break; 78 case 'h': 79 howto |= RB_SERIAL; 80 break; 81 case 'p': 82 howto |= RB_PAUSE; 83 break; 84 case 'r': 85 howto |= RB_DFLTROOT; 86 break; 87 case 's': 88 howto |= RB_SINGLE; 89 break; 90 case 'v': 91 howto |= RB_VERBOSE; 92 break; 93 default: 94 active = 0; 95 break; 96 } 97 cp++; 98 } 99 } 100 /* get equivalents from the environment */ 101 for (i = 0; howto_names[i].ev != NULL; i++) 102 if (getenv(howto_names[i].ev) != NULL) 103 howto |= howto_names[i].mask; 104 if (!strcmp(getenv("console"), "comconsole")) 105 howto |= RB_SERIAL; 106 if (!strcmp(getenv("console"), "nullconsole")) 107 howto |= RB_MUTE; 108 if (!strcmp(getenv("console"), "vidconsole")) 109 howto |= RB_VIDEO; 110 return(howto); 111 } 112 113 /* 114 * Copy the environment into the load area starting at (addr). 115 * Each variable is formatted as <name>=<value>, with a single nul 116 * separating each variable, and a double nul terminating the environment. 117 */ 118 vm_offset_t 119 bi_copyenv(vm_offset_t addr) 120 { 121 struct env_var *ep; 122 123 /* traverse the environment */ 124 for (ep = environ; ep != NULL; ep = ep->ev_next) { 125 i386_copyin(ep->ev_name, addr, strlen(ep->ev_name)); 126 addr += strlen(ep->ev_name); 127 i386_copyin("=", addr, 1); 128 addr++; 129 if (ep->ev_value != NULL) { 130 i386_copyin(ep->ev_value, addr, strlen(ep->ev_value)); 131 addr += strlen(ep->ev_value); 132 } 133 i386_copyin("", addr, 1); 134 addr++; 135 } 136 i386_copyin("", addr, 1); 137 addr++; 138 return(addr); 139 } 140