1 /* $OpenBSD: boot.c,v 1.36 2007/06/26 10:34:41 tom Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Dale Rahn 5 * Copyright (c) 1997,1998 Michael Shalayeff 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 #include <sys/param.h> 32 #include <sys/reboot.h> 33 #include <sys/stat.h> 34 #include <libsa.h> 35 #include <lib/libsa/loadfile.h> 36 #include <lib/libkern/funcs.h> 37 38 #include "cmd.h" 39 40 #ifndef KERNEL 41 #define KERNEL "/bsd" 42 #endif 43 44 char prog_ident[40]; 45 char *progname = "BOOT"; 46 47 extern const char version[]; 48 struct cmd_state cmd; 49 50 /* bootprompt can be set by MD code to avoid prompt first time round */ 51 int bootprompt = 1; 52 char *kernelfile = KERNEL; /* can be changed by MD code */ 53 54 void 55 boot(dev_t bootdev) 56 { 57 int fd; 58 int try = 0, st; 59 u_long marks[MARK_MAX]; 60 61 machdep(); 62 63 snprintf(prog_ident, sizeof(prog_ident), 64 ">> OpenBSD/" MACHINE " %s %s", progname, version); 65 printf("%s\n", prog_ident); 66 67 devboot(bootdev, cmd.bootdev); 68 strlcpy(cmd.image, kernelfile, sizeof(cmd.image)); 69 cmd.boothowto = 0; 70 cmd.conf = "/etc/boot.conf"; 71 cmd.addr = (void *)DEFAULT_KERNEL_ADDRESS; 72 cmd.timeout = 5; 73 74 st = read_conf(); 75 if (!bootprompt) 76 snprintf(cmd.path, sizeof cmd.path, "%s:%s", 77 cmd.bootdev, cmd.image); 78 79 while (1) { 80 /* no boot.conf, or no boot cmd in there */ 81 if (bootprompt && st <= 0) 82 do { 83 printf("boot> "); 84 } while(!getcmd()); 85 st = 0; 86 bootprompt = 1; /* allow reselect should we fail */ 87 88 printf("booting %s: ", cmd.path); 89 marks[MARK_START] = (u_long)cmd.addr; 90 if ((fd = loadfile(cmd.path, marks, LOAD_ALL)) != -1) { 91 close(fd); 92 break; 93 } 94 95 kernelfile = KERNEL; 96 try++; 97 strlcpy(cmd.image, kernelfile, sizeof(cmd.image)); 98 printf(" failed(%d). will try %s\n", errno, kernelfile); 99 100 if (try < 2) { 101 if (cmd.timeout > 0) 102 cmd.timeout++; 103 } else { 104 if (cmd.timeout) 105 printf("Turning timeout off.\n"); 106 cmd.timeout = 0; 107 } 108 } 109 110 /* exec */ 111 run_loadfile(marks, cmd.boothowto); 112 } 113 114 #ifdef _TEST 115 int 116 main() 117 { 118 boot(0); 119 return 0; 120 } 121 #endif 122