1 /* 2 * Copyright (c) 1980, 1986, 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)installboot.c 7.2 (Berkeley) 12/16/90 8 */ 9 10 #ifndef lint 11 char copyright[] = 12 "@(#) Copyright (c) 1980, 1986, 1990 The Regents of the University of California.\n\ 13 All rights reserved.\n"; 14 #endif /* not lint */ 15 16 #ifndef lint 17 static char sccsid[] = "@(#)installboot.c 7.2 (Berkeley) 12/16/90"; 18 #endif /* not lint */ 19 20 #include "sys/param.h" 21 #include "ufs/fs.h" 22 23 char block[1024]; 24 int maxbootsize = 16 * 7 * 512; /* XXX */ 25 26 /* 27 * HPs are a kludge. 28 * The boot program won't fit in the boot area of a file system so we 29 * have to place it outside the file systems. By convention, this means 30 * that if the 'a' partition is being used for '/', it is offset one 31 * cylinder into the disk and the boot program goes into that one cylinder. 32 * Also by convention, the 'c' partition is defined to be the entire disk 33 * including this boot cylinder. If these conventions are not adhered to, 34 * the potential for disaster is enormous. 35 */ 36 main(argc, argv) 37 int argc; 38 char *argv[]; 39 { 40 int ifd, ofd, len; 41 char *dev, *standalonecode; 42 int bsize = 1024; 43 44 if (argc != 3) 45 usage(); 46 dev = argv[2]; 47 len = strlen(dev); 48 if (dev[len-1] != 'c') 49 usage(); 50 standalonecode = argv[1]; 51 ifd = open(standalonecode, 0); 52 if (ifd < 0) { 53 perror(standalonecode); 54 exit(1); 55 } 56 ofd = open(dev, 1); 57 if (ofd < 0) { 58 perror(dev); 59 exit(1); 60 } 61 while ((len = read(ifd, block, bsize)) > 0) { 62 if ((maxbootsize -= bsize) < 0) { 63 printf("%s: too big\n", standalonecode); 64 exit(2); 65 } 66 if (len < bsize) 67 bzero(&block[len], bsize-len); 68 if (write(ofd, block, bsize) != bsize) { 69 perror(dev); 70 exit(2); 71 } 72 } 73 if (len < 0) { 74 perror(standalonecode); 75 exit(2); 76 } 77 exit(0); 78 } 79 80 usage() 81 { 82 printf("Usage: installboot bootprog device\n"); 83 printf("where:\n"); 84 printf("\t\"bootprog\" is a LIF format file < %d bytes long\n", 85 maxbootsize); 86 printf("\t\"device\" must be the 'c' partition of a bootable disk\n"); 87 printf("WARNING!! If the 'c' partition contains a file system, %s\n", 88 "DON'T RUN THIS!!"); 89 exit(1); 90 } 91