projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a8fd2d0d KM |
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 7.1 (Berkeley) %G% | |
| 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 7.1 (Berkeley) %G%"; | |
| 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 | } |