Annotation of sys/stand/boot/boot.c, Revision 1.1
1.1 ! nbrk 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
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