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Annotation of Net2/arch/hp300/stand/installboot.c, revision 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 and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)installboot.c       7.2 (Berkeley) 12/16/90
        !            34:  */
        !            35: 
        !            36: #ifndef lint
        !            37: char copyright[] =
        !            38: "@(#) Copyright (c) 1980, 1986, 1990 The Regents of the University of California.\n\
        !            39:  All rights reserved.\n";
        !            40: #endif /* not lint */
        !            41: 
        !            42: #ifndef lint
        !            43: static char sccsid[] = "@(#)installboot.c      7.2 (Berkeley) 12/16/90";
        !            44: #endif /* not lint */
        !            45: 
        !            46: #include "sys/param.h"
        !            47: #include "ufs/fs.h"
        !            48: 
        !            49: char block[1024];
        !            50: int maxbootsize = 16 * 7 * 512;                /* XXX */
        !            51: 
        !            52: /*
        !            53:  * HPs are a kludge.
        !            54:  * The boot program won't fit in the boot area of a file system so we
        !            55:  * have to place it outside the file systems.  By convention, this means
        !            56:  * that if the 'a' partition is being used for '/', it is offset one
        !            57:  * cylinder into the disk and the boot program goes into that one cylinder.
        !            58:  * Also by convention, the 'c' partition is defined to be the entire disk
        !            59:  * including this boot cylinder.  If these conventions are not adhered to,
        !            60:  * the potential for disaster is enormous.
        !            61:  */
        !            62: main(argc, argv)
        !            63:        int argc;
        !            64:        char *argv[];
        !            65: {
        !            66:        int ifd, ofd, len;
        !            67:        char *dev, *standalonecode;
        !            68:        int bsize = 1024;
        !            69: 
        !            70:        if (argc != 3)
        !            71:                usage();
        !            72:        dev = argv[2];
        !            73:        len = strlen(dev);
        !            74:        if (dev[len-1] != 'c')
        !            75:                usage();
        !            76:        standalonecode = argv[1];
        !            77:        ifd = open(standalonecode, 0);
        !            78:        if (ifd < 0) {
        !            79:                perror(standalonecode);
        !            80:                exit(1);
        !            81:        }
        !            82:        ofd = open(dev, 1);
        !            83:        if (ofd < 0) {
        !            84:                perror(dev);
        !            85:                exit(1);
        !            86:        }
        !            87:        while ((len = read(ifd, block, bsize)) > 0) {
        !            88:                if ((maxbootsize -= bsize) < 0) {
        !            89:                        printf("%s: too big\n", standalonecode);
        !            90:                        exit(2);
        !            91:                }
        !            92:                if (len < bsize)
        !            93:                        bzero(&block[len], bsize-len);
        !            94:                if (write(ofd, block, bsize) != bsize) {
        !            95:                        perror(dev);
        !            96:                        exit(2);
        !            97:                }
        !            98:        }
        !            99:        if (len < 0) {
        !           100:                perror(standalonecode);
        !           101:                exit(2);
        !           102:        }
        !           103:        exit(0);
        !           104: }
        !           105: 
        !           106: usage()
        !           107: {
        !           108:        printf("Usage: installboot bootprog device\n");
        !           109:        printf("where:\n");
        !           110:        printf("\t\"bootprog\" is a LIF format file < %d bytes long\n",
        !           111:               maxbootsize);
        !           112:        printf("\t\"device\" must be the 'c' partition of a bootable disk\n");
        !           113:        printf("WARNING!!  If the 'c' partition contains a file system, %s\n",
        !           114:               "DON'T RUN THIS!!");
        !           115:        exit(1);
        !           116: }

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