diff options
Diffstat (limited to 'sbin/i386/nextboot/nextboot.c')
| -rw-r--r-- | sbin/i386/nextboot/nextboot.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/sbin/i386/nextboot/nextboot.c b/sbin/i386/nextboot/nextboot.c deleted file mode 100644 index 5893ca3..0000000 --- a/sbin/i386/nextboot/nextboot.c +++ /dev/null @@ -1,202 +0,0 @@ -/* - * Copyright (c) 1996 Whistle Communications - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * Whistle Communications allows free use of this software in its "as is" - * condition. Whistle Communications disclaims any liability of any kind for - * any damages whatsoever resulting from the use of this software. - */ - -#ifndef lint -static const char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/disklabel.h> -#include <fcntl.h> -#include <err.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -struct mboot -{ - unsigned char padding[2]; /* force the longs to be long aligned */ - unsigned char bootinst[DOSPARTOFF]; - struct dos_partition parts[4]; - unsigned short int signature; -}; -struct mboot mboot; - -#define NAMEBLOCK 1 /* 2nd block */ -#define BLOCKSIZE 512 -#define ENABLE_MAGIC 0xfadefeed -#define DISABLE_MAGIC 0xfadefade -static int bflag; -static int eflag; -static int dflag; - -#define BOOT_MAGIC 0xAA55 - -static void -usage(void) { - fprintf (stderr, "%s\n%s\n", - "usage: nextboot [-b] device bootstring [bootstring] ...", - " nextboot {-e,-d} device"); - exit(1); -} - -int -main (int argc, char** argv) -{ - int fd = -1; - char namebuf[1024], *cp = namebuf; - int i,j; - int ch; - int part; - - bflag = 0; - while ((ch = getopt(argc, argv, "bde")) != -1) { - switch(ch) { - case 'b': - bflag = 1; - break; - case 'd': - dflag = 1; - break; - case 'e': - eflag = 1; - break; - case '?': - default: - usage(); - } - } - argc -= optind; - argv += optind; - - if ( (dflag + eflag + bflag) > 1 ) { - usage(); - } - if (dflag + eflag){ - if(argc != 1 ) { - usage(); - } - } else { - if (argc <2) { - usage(); - } - } - if ((fd = open(argv[0], O_RDWR, 0)) < 0) - errx(1, "can't open %s", argv[0]); - - argc--; - argv++; - - /******************************************* - * Check that we have an MBR - */ - if (lseek(fd,0,0) == -1) - err(1, "lseek"); - if (read (fd,&mboot.bootinst[0],BLOCKSIZE ) != BLOCKSIZE) - err(1, "read0"); - if (mboot.signature != (unsigned short)BOOT_MAGIC) - errx(1, "no fdisk part.. not touching block 1"); - - /******************************************* - * And check that none of the partitions in it cover the name block; - */ - for ( part = 0; part < 4; part++) { - if( mboot.parts[part].dp_size - && (mboot.parts[part].dp_start <= NAMEBLOCK) - && (mboot.parts[part].dp_start - + mboot.parts[part].dp_size > NAMEBLOCK)) - errx(1, - "name sector lies within a Bios partition: aborting write"); - } - - - /******************************************* - * Now check the name sector itself to see if it's been initialized. - */ - if (lseek(fd,NAMEBLOCK * BLOCKSIZE,0) == -1) - err(1, "lseek"); - if (read(fd,namebuf,BLOCKSIZE) != BLOCKSIZE) - err(1, "read1"); - /******************************************* - * check if we are just enabling or disabling - * Remember the flags are exclusive.. - */ - if(!bflag) { /* don't care what's there if bflag is set */ - switch(*(unsigned long *)cp) - { - case DISABLE_MAGIC: - case ENABLE_MAGIC: - break; - default: - errx(1, "namesector not initialized, use the -b flag"); - } - } - - - /******************************************* - * If the z or r flag is set, damage or restore the magic number.. - * to disable/enable the feature - */ - if(dflag) { - *(unsigned long *)cp = DISABLE_MAGIC; - } else { - *(unsigned long *)cp = ENABLE_MAGIC; - } - if ((!dflag) && (!eflag)) { - /******************************************* - * Create a new namesector in ram - */ - cp += 4; - for ( i = 0 ; i < argc ; i++ ) { - *cp++ = 'D'; - *cp++ = 'N'; - j = strlen(argv[i]); - strncpy(cp,argv[i],j); - cp += j; - *cp++ = 0; - } - *cp++ = 0xff; - *cp++ = 0xff; - *cp++ = 0xff; - namebuf[BLOCKSIZE-1] = 0; /* paranoid */ - namebuf[BLOCKSIZE] = 0xff; - } - - /******************************************* - * write it to disk. - */ - if (lseek(fd,NAMEBLOCK * BLOCKSIZE,0) == -1) - err(1, "lseek"); - if(write (fd,namebuf,BLOCKSIZE ) != BLOCKSIZE) - err(1, "write"); - -#if 0 - /******************************************* - * just to be safe/paranoid.. read it back.. - * and print it.. - */ - if (lseek(fd,NAMEBLOCK * BLOCKSIZE,0) == -1) - err(1, "lseek (second)"); - read (fd,namebuf,512); - for (i = 0;i< 16;i++) { - for ( j = 0; j < 16; j++) { - printf("%02x ",(unsigned char )namebuf[(i*16) + j ]); - } - printf("\n"); - } -#endif - exit(0); -} |
