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Annotation of 43BSDReno/sys/hpstand/installboot.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980, 1986, 1990 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution is only permitted until one year after the first shipment
                      6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
                      7:  * binary forms are permitted provided that: (1) source distributions retain
                      8:  * this entire copyright notice and comment, and (2) distributions including
                      9:  * binaries display the following acknowledgement:  This product includes
                     10:  * software developed by the University of California, Berkeley and its
                     11:  * contributors'' in the documentation or other materials provided with the
                     12:  * distribution and in all advertising materials mentioning features or use
                     13:  * of this software.  Neither the name of the University nor the names of
                     14:  * its contributors may be used to endorse or promote products derived from
                     15:  * this software without specific prior written permission.
                     16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     19:  *
                     20:  *     @(#)installboot.c       7.1 (Berkeley) 5/8/90
                     21:  */
                     22: 
                     23: #ifndef lint
                     24: char copyright[] =
                     25: "@(#) Copyright (c) 1980, 1986, 1990 The Regents of the University of California.\n\
                     26:  All rights reserved.\n";
                     27: #endif /* not lint */
                     28: 
                     29: #ifndef lint
                     30: static char sccsid[] = "@(#)installboot.c      7.1 (Berkeley) 5/8/90";
                     31: #endif /* not lint */
                     32: 
                     33: #include "../sys/param.h"
                     34: #include "../ufs/fs.h"
                     35: 
                     36: char block[1024];
                     37: int maxbootsize = 16 * 7 * 512;                /* XXX */
                     38: 
                     39: /*
                     40:  * HPs are a kludge.
                     41:  * The boot program won't fit in the boot area of a file system so we
                     42:  * have to place it outside the file systems.  By convention, this means
                     43:  * that if the 'a' partition is being used for '/', it is offset one
                     44:  * cylinder into the disk and the boot program goes into that one cylinder.
                     45:  * Also by convention, the 'c' partition is defined to be the entire disk
                     46:  * including this boot cylinder.  If these conventions are not adhered to,
                     47:  * the potential for disaster is enormous.
                     48:  */
                     49: main(argc, argv)
                     50:        int argc;
                     51:        char *argv[];
                     52: {
                     53:        int ifd, ofd, len;
                     54:        char *dev, *standalonecode;
                     55:        int bsize = 1024;
                     56: 
                     57:        if (argc != 3)
                     58:                usage();
                     59:        dev = argv[2];
                     60:        len = strlen(dev);
                     61:        if (dev[len-1] != 'c')
                     62:                usage();
                     63:        standalonecode = argv[1];
                     64:        ifd = open(standalonecode, 0);
                     65:        if (ifd < 0) {
                     66:                perror(standalonecode);
                     67:                exit(1);
                     68:        }
                     69:        ofd = open(dev, 1);
                     70:        if (ofd < 0) {
                     71:                perror(dev);
                     72:                exit(1);
                     73:        }
                     74:        while ((len = read(ifd, block, bsize)) > 0) {
                     75:                if ((maxbootsize -= bsize) < 0) {
                     76:                        printf("%s: too big\n", standalonecode);
                     77:                        exit(2);
                     78:                }
                     79:                if (len < bsize)
                     80:                        bzero(&block[len], bsize-len);
                     81:                if (write(ofd, block, bsize) != bsize) {
                     82:                        perror(dev);
                     83:                        exit(2);
                     84:                }
                     85:        }
                     86:        if (len < 0) {
                     87:                perror(standalonecode);
                     88:                exit(2);
                     89:        }
                     90:        exit(0);
                     91: }
                     92: 
                     93: usage()
                     94: {
                     95:        printf("Usage: installboot bootprog device\n");
                     96:        printf("where:\n");
                     97:        printf("\t\"bootprog\" is a LIF format file < %d bytes long\n",
                     98:               maxbootsize);
                     99:        printf("\t\"device\" must be the 'c' partition of a bootable disk\n");
                    100:        printf("WARNING!!  If the 'c' partition contains a file system, %s\n",
                    101:               "DON'T RUN THIS!!");
                    102:        exit(1);
                    103: }

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