/* * Mach Operating System * Copyright (c) 1992 Carnegie Mellon University * 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. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ #ifndef lint static const char rcsid[] = "$FreeBSD$"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int iotest; #define LBUF 100 static char lbuf[LBUF]; #ifndef PC98 #define MBRSIGOFF 510 #endif /* * * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 * * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University * Copyright (c) 1989 Robert. V. Baron * Created. */ #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp #define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); } #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ static int secsize = 0; /* the sensed sector size */ static char *disk; static int cyls, sectors, heads, cylsecs, disksecs; #ifdef PC98 struct mboot { unsigned char padding[2]; /* force the longs to be long aligned */ unsigned char bootinst[510]; unsigned short int signature; struct dos_partition parts[8]; unsigned char large_sector_overflow[MAX_SEC_SIZE-MIN_SEC_SIZE]; }; #else /* PC98 */ struct mboot { unsigned char padding[2]; /* force the longs to be long aligned */ unsigned char *bootinst; /* boot code */ off_t bootinst_size; struct dos_partition parts[4]; }; #endif /* PC98 */ static struct mboot mboot; static int fd; #define ACTIVE 0x80 #define BOOT_MAGIC 0xAA55 static uint dos_cyls; static uint dos_heads; static uint dos_sectors; static uint dos_cylsecs; #ifndef PC98 #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) #define DOSCYL(c) (c & 0xff) #endif #define MAX_ARGS 10 static int current_line_number; typedef struct cmd { char cmd; int n_args; struct arg { char argtype; int arg_val; } args[MAX_ARGS]; } CMD; static int B_flag = 0; /* replace boot code */ #ifndef PC98 static int I_flag = 0; /* use entire disk for FreeBSD */ #endif static int a_flag = 0; /* set active partition */ #ifndef PC98 static char *b_flag = NULL; /* path to boot code */ #endif static int i_flag = 0; /* replace partition data */ static int u_flag = 0; /* update partition data */ static int s_flag = 0; /* Print a summary and exit */ static int t_flag = 0; /* test only */ static char *f_flag = NULL; /* Read config info from file */ static int v_flag = 0; /* Be verbose */ static struct part_type { unsigned char type; const char *name; } part_types[] = { #ifdef PC98 {0x00, "unused"} ,{0x01, "Primary DOS with 12 bit FAT"} ,{0x11, "MSDOS"} ,{0x20, "MSDOS"} ,{0x21, "MSDOS"} ,{0x22, "MSDOS"} ,{0x23, "MSDOS"} ,{0x02, "XENIX / file system"} ,{0x03, "XENIX /usr file system"} ,{0x04, "PC-UX"} ,{0x05, "Extended DOS"} ,{0x06, "Primary 'big' DOS (> 32MB)"} ,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"} ,{0x08, "AIX file system"} ,{0x09, "AIX boot partition or Coherent"} ,{0x0A, "OS/2 Boot Manager or OPUS"} ,{0x10, "OPUS"} ,{0x14, "FreeBSD/NetBSD/386BSD"} ,{0x94, "FreeBSD/NetBSD/386BSD"} ,{0x40, "VENIX 286"} ,{0x50, "DM"} ,{0x51, "DM"} ,{0x52, "CP/M or Microport SysV/AT"} ,{0x56, "GB"} ,{0x61, "Speed"} ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"} ,{0x64, "Novell Netware 2.xx"} ,{0x65, "Novell Netware 3.xx"} ,{0x75, "PCIX"} ,{0x40, "Minix"} #endif }; static void print_s0(int which); static void print_part(int i); static void init_sector0(unsigned long start); static void init_boot(void); static void change_part(int i); static void print_params(void); static void change_active(int which); static void change_code(void); static void get_params_to_use(void); static char *get_rootdisk(void); #ifdef PC98 static void dos(int sec, int size, unsigned short *c, unsigned char *s, unsigned char *h); #else static void dos(struct dos_partition *partp); #endif static int open_disk(int flag); static ssize_t read_disk(off_t sector, void *buf); static ssize_t write_disk(off_t sector, void *buf); static int get_params(void); static int read_s0(void); static int write_s0(void); static int ok(const char *str); static int decimal(const char *str, int *num, int deflt); static const char *get_type(int type); static int read_config(char *config_file); static void reset_boot(void); #ifndef PC98 static int sanitize_partition(struct dos_partition *); #endif static void usage(void); #ifdef PC98 static int string(char *str, char **ans); #endif int main(int argc, char *argv[]) { struct stat sb; int c, i; int partition = -1; struct dos_partition *partp; #ifdef PC98 while ((c = getopt(argc, argv, "Ba:f:istuv12345678")) != -1) #else while ((c = getopt(argc, argv, "BIab:f:istuv1234")) != -1) #endif switch (c) { case 'B': B_flag = 1; break; #ifndef PC98 case 'I': I_flag = 1; break; #endif case 'a': a_flag = 1; break; #ifndef PC98 case 'b': b_flag = optarg; break; #endif case 'f': f_flag = optarg; break; case 'i': i_flag = 1; break; case 's': s_flag = 1; break; case 't': t_flag = 1; break; case 'u': u_flag = 1; break; case 'v': v_flag = 1; break; case '1': case '2': case '3': case '4': #ifdef PC98 case '5': case '6': case '7': case '8': #endif partition = c - '0'; break; default: usage(); } if (f_flag || i_flag) u_flag = 1; if (t_flag) v_flag = 1; argc -= optind; argv += optind; if (argc == 0) { disk = get_rootdisk(); } else { if (stat(argv[0], &sb) == 0) { /* OK, full pathname given */ disk = argv[0]; } else if (errno == ENOENT) { /* Try prepending "/dev" */ asprintf(&disk, "%s%s", _PATH_DEV, argv[0]); if (disk == NULL) errx(1, "out of memory"); } else { /* other stat error, let it fail below */ disk = argv[0]; } } if (open_disk(u_flag) < 0) err(1, "cannot open disk %s", disk); #ifndef PC98 /* (abu)use mboot.bootinst to probe for the sector size */ if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) err(1, "cannot allocate buffer to determine disk sector size"); read_disk(0, mboot.bootinst); free(mboot.bootinst); mboot.bootinst = NULL; #endif if (s_flag) { if (read_s0()) err(1, "read_s0"); printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, dos_sectors); #ifdef PC98 printf("Part %11s %11s SID\n", "Start", "Size"); for (i = 0; i < NDOSPART; i++) { partp = ((struct dos_partition *) &mboot.parts) + i; if (partp->dp_sid == 0) continue; printf("%4d: %11lu %11lu 0x%02x\n", i + 1, partp->dp_scyl * cylsecs, (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs, partp->dp_sid); #else printf("Part %11s %11s Type Flags\n", "Start", "Size"); for (i = 0; i < NDOSPART; i++) { partp = ((struct dos_partition *) &mboot.parts) + i; if (partp->dp_start == 0 && partp->dp_size == 0) continue; printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, (u_long) partp->dp_start, (u_long) partp->dp_size, partp->dp_typ, partp->dp_flag); #endif } exit(0); } printf("******* Working on device %s *******\n",disk); #ifndef PC98 if (I_flag) { read_s0(); reset_boot(); partp = (struct dos_partition *) (&mboot.parts[0]); partp->dp_typ = DOSPTYP_386BSD; partp->dp_flag = ACTIVE; partp->dp_start = dos_sectors; partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - dos_sectors; dos(partp); if (v_flag) print_s0(-1); if (!t_flag) write_s0(); exit(0); } #endif if (f_flag) { #ifndef PC98 if (read_s0() || i_flag) reset_boot(); if (!read_config(f_flag)) exit(1); #endif if (v_flag) print_s0(-1); if (!t_flag) write_s0(); } else { if(u_flag) get_params_to_use(); else print_params(); if (read_s0()) init_sector0(dos_sectors); printf("Media sector size is %d\n", secsize); printf("Warning: BIOS sector numbering starts with sector 1\n"); printf("Information from DOS bootblock is:\n"); if (partition == -1) for (i = 1; i <= NDOSPART; i++) change_part(i); else change_part(partition); if (u_flag || a_flag) change_active(partition); if (B_flag) change_code(); if (u_flag || a_flag || B_flag) { if (!t_flag) { printf("\nWe haven't changed the partition table yet. "); printf("This is your last chance.\n"); } print_s0(-1); if (!t_flag) { if (ok("Should we write new partition table?")) write_s0(); } else { printf("\n-t flag specified -- partition table not written.\n"); } } } exit(0); } static void usage() { fprintf(stderr, "%s%s", "usage: fdisk [-Baistu] [-12345678] [disk]\n", " fdisk -f configfile [-itv] [disk]\n"); exit(1); } static void print_s0(int which) { int i; print_params(); printf("Information from DOS bootblock is:\n"); if (which == -1) for (i = 1; i <= NDOSPART; i++) printf("%d: ", i), print_part(i); else print_part(which); } static struct dos_partition mtpart; static void print_part(int i) { struct dos_partition *partp; u_int64_t part_sz, part_mb; partp = ((struct dos_partition *) &mboot.parts) + i - 1; if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { printf("\n"); return; } /* * Be careful not to overflow. */ #ifdef PC98 part_sz = (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs; part_mb = part_sz * secsize; part_mb /= (1024 * 1024); printf("sysmid %d (%#04x),(%s)\n", partp->dp_mid, partp->dp_mid, get_type(partp->dp_mid)); printf(" start %lu, size %lu (%ju Meg), sid %d\n", (u_long)(partp->dp_scyl * cylsecs), (u_long)part_sz, (uintmax_t)part_mb, partp->dp_sid); #else part_mb = partp->dp_size; part_mb *= secsize; part_mb /= (1024 * 1024); printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ, get_type(partp->dp_typ)); printf(" start %lu, size %lu (%ju Meg), flag %x%s\n", (u_long)partp->dp_start, (u_long)partp->dp_size, (uintmax_t)part_mb, partp->dp_flag, partp->dp_flag == ACTIVE ? " (active)" : ""); #endif printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" ,partp->dp_scyl ,partp->dp_shd ,partp->dp_ssect ,partp->dp_ecyl ,partp->dp_ehd ,partp->dp_esect); #ifdef PC98 printf ("\tsystem Name %.16s\n",partp->dp_name); #endif } static void init_boot(void) { #ifdef PC98 mboot.signature = BOOT_MAGIC; #else const char *fname; int fdesc, n; struct stat sb; fname = b_flag ? b_flag : "/boot/mbr"; if ((fdesc = open(fname, O_RDONLY)) == -1 || fstat(fdesc, &sb) == -1) err(1, "%s", fname); if ((mboot.bootinst_size = sb.st_size) % secsize != 0) errx(1, "%s: length must be a multiple of sector size", fname); if (mboot.bootinst != NULL) free(mboot.bootinst); if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) errx(1, "%s: unable to allocate read buffer", fname); if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 || close(fdesc)) err(1, "%s", fname); if (n != mboot.bootinst_size) errx(1, "%s: short read", fname); #endif } static void init_sector0(unsigned long start) { #ifdef PC98 struct dos_partition *partp = (struct dos_partition *)(&mboot.parts[3]); unsigned long size = disksecs - start; init_boot(); partp->dp_mid = DOSMID_386BSD; partp->dp_sid = DOSSID_386BSD; dos(start, size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); partp->dp_ipl_cyl = partp->dp_scyl; partp->dp_ipl_sct = partp->dp_ssect; partp->dp_ipl_head = partp->dp_shd; dos(start+size-cylsecs, size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); #else struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); init_boot(); partp->dp_typ = DOSPTYP_386BSD; partp->dp_flag = ACTIVE; start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors; if(start == 0) start = dos_sectors; partp->dp_start = start; partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start; dos(partp); #endif } static void change_part(int i) { struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; printf("The data for partition %d is:\n", i); print_part(i); if (u_flag && ok("Do you want to change it?")) { int tmp; if (i_flag) { bzero((char *)partp, sizeof (struct dos_partition)); if (i == 4) { init_sector0(1); printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n"); print_part(i); } } do { #ifdef PC98 int x_start = partp->dp_scyl * cylsecs ; int x_size = (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs; Decimal("sysmid", partp->dp_mid, tmp); Decimal("syssid", partp->dp_sid, tmp); String ("system name", partp->dp_name, 16); Decimal("start", x_start, tmp); Decimal("size", x_size, tmp); #else Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp); Decimal("start", partp->dp_start, tmp); Decimal("size", partp->dp_size, tmp); if (!sanitize_partition(partp)) { warnx("ERROR: failed to adjust; setting sysid to 0"); partp->dp_typ = 0; } #endif if (ok("Explicitly specify beg/end address ?")) { int tsec,tcyl,thd; tcyl = partp->dp_scyl; thd = partp->dp_shd; tsec = partp->dp_ssect; Decimal("beginning cylinder", tcyl, tmp); Decimal("beginning head", thd, tmp); Decimal("beginning sector", tsec, tmp); #ifdef PC98 partp->dp_scyl = tcyl; partp->dp_ssect = tsec; partp->dp_shd = thd; partp->dp_ipl_cyl = partp->dp_scyl; partp->dp_ipl_sct = partp->dp_ssect; partp->dp_ipl_head = partp->dp_shd; #else partp->dp_scyl = DOSCYL(tcyl); partp->dp_ssect = DOSSECT(tsec,tcyl); partp->dp_shd = thd; #endif tcyl = partp->dp_ecyl; thd = partp->dp_ehd; tsec = partp->dp_esect; Decimal("ending cylinder", tcyl, tmp); Decimal("ending head", thd, tmp); Decimal("ending sector", tsec, tmp); #ifdef PC98 partp->dp_ecyl = tcyl; partp->dp_esect = tsec; partp->dp_ehd = thd; #else partp->dp_ecyl = DOSCYL(tcyl); partp->dp_esect = DOSSECT(tsec,tcyl); partp->dp_ehd = thd; #endif #ifdef PC98 } else { dos(x_start, x_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); partp->dp_ipl_cyl = partp->dp_scyl; partp->dp_ipl_sct = partp->dp_ssect; partp->dp_ipl_head = partp->dp_shd; dos(x_start+x_size - cylsecs, x_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); } #else } else dos(partp); #endif print_part(i); } while (!ok("Are we happy with this entry?")); } } static void print_params() { printf("parameters extracted from in-core disklabel are:\n"); printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" ,cyls,heads,sectors,cylsecs); #ifndef PC98 if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255)) printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); #endif printf("parameters to be used for BIOS calculations are:\n"); printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); } static void change_active(int which) { #ifdef PC98 struct dos_partition *partp = ((struct dos_partition *) &mboot.parts); int active, i, tmp; active = 8; #else struct dos_partition *partp = &mboot.parts[0]; int active, i, new, tmp; active = -1; for (i = 0; i < NDOSPART; i++) { if ((partp[i].dp_flag & ACTIVE) == 0) continue; printf("Partition %d is marked active\n", i + 1); if (active == -1) active = i + 1; } #endif if (a_flag && which != -1) active = which; #ifndef PC98 else if (active == -1) active = 1; #endif if (!ok("Do you want to change the active partition?")) return; setactive: #ifdef PC98 active = 4; do { Decimal("active partition", active, tmp); if (active < 1 || 8 < active) { printf("Active partition number must be in range 1-8." " Try again.\n"); goto setactive; } } while (!ok("Are you happy with this choice")); partp[active].dp_sid |= ACTIVE; #else do { new = active; Decimal("active partition", new, tmp); if (new < 1 || new > 4) { printf("Active partition number must be in range 1-4." " Try again.\n"); goto setactive; } active = new; } while (!ok("Are you happy with this choice")); for (i = 0; i < NDOSPART; i++) partp[i].dp_flag = 0; if (active > 0 && active <= NDOSPART) partp[active-1].dp_flag = ACTIVE; #endif } static void change_code() { if (ok("Do you want to change the boot code?")) init_boot(); } void get_params_to_use() { int tmp; print_params(); if (ok("Do you want to change our idea of what BIOS thinks ?")) { do { Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); Decimal("BIOS's idea of #heads", dos_heads, tmp); Decimal("BIOS's idea of #sectors", dos_sectors, tmp); dos_cylsecs = dos_heads * dos_sectors; print_params(); } while(!ok("Are you happy with this choice")); } } /***********************************************\ * Change real numbers into strange dos numbers * \***********************************************/ #ifdef PC98 static void dos(int sec, int size, unsigned short *c, unsigned char *s, unsigned char *h) { int cy, hd; if (sec == 0 && size == 0) { *s = *c = *h = 0; return; } cy = sec / ( dos_cylsecs ); sec = sec - cy * ( dos_cylsecs ); hd = sec / dos_sectors; sec = (sec - hd * dos_sectors); *h = hd; *c = cy; *s = sec; } #else static void dos(struct dos_partition *partp) { int cy, sec; u_int32_t end; if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) { memcpy(partp, &mtpart, sizeof(*partp)); return; } /* Start c/h/s. */ partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors; cy = partp->dp_start / dos_cylsecs; sec = partp->dp_start % dos_sectors + 1; partp->dp_scyl = DOSCYL(cy); partp->dp_ssect = DOSSECT(sec, cy); /* End c/h/s. */ end = partp->dp_start + partp->dp_size - 1; partp->dp_ehd = end % dos_cylsecs / dos_sectors; cy = end / dos_cylsecs; sec = end % dos_sectors + 1; partp->dp_ecyl = DOSCYL(cy); partp->dp_esect = DOSSECT(sec, cy); } #endif static int open_disk(int flag) { struct stat st; if (stat(disk, &st) == -1) { if (errno == ENOENT) return -2; warnx("can't get file status of %s", disk); return -1; } if ( !(st.st_mode & S_IFCHR) ) warnx("device %s is not character special", disk); #ifdef PC98 if ((fd = open(disk, a_flag || B_flag || flag ? O_RDWR : O_RDONLY)) == -1) { if(errno == ENXIO) return -2; warnx("can't open device %s", disk); return -1; } #else if ((fd = open(disk, a_flag || I_flag || B_flag || flag ? O_RDWR : O_RDONLY)) == -1) { if(errno == ENXIO) return -2; warnx("can't open device %s", disk); return -1; } #endif if (get_params() == -1) { warnx("can't get disk parameters on %s", disk); return -1; } return fd; } static ssize_t read_disk(off_t sector, void *buf) { lseek(fd,(sector * 512), 0); #ifdef PC98 return read(fd, buf, secsize > MIN_SEC_SIZE ? secsize : MIN_SEC_SIZE * 2); #else if( secsize == 0 ) for( secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2 ) { /* try the read */ int size = read(fd, buf, secsize); if( size == secsize ) /* it worked so return */ return secsize; } else return read( fd, buf, secsize ); /* we failed to read at any of the sizes */ return -1; #endif } static ssize_t write_disk(off_t sector, void *buf) { lseek(fd,(sector * 512), 0); /* write out in the size that the read_disk found worked */ #ifdef PC98 return write(fd, buf, secsize > MIN_SEC_SIZE ? secsize : MIN_SEC_SIZE * 2); #else return write(fd, buf, secsize); #endif } static int get_params() { int error; u_int u; off_t o; error = ioctl(fd, DIOCGFWSECTORS, &u); if (error == 0) sectors = dos_sectors = u; error = ioctl(fd, DIOCGFWHEADS, &u); if (error == 0) heads = dos_heads = u; dos_cylsecs = cylsecs = heads * sectors; disksecs = cyls * heads * sectors; error = ioctl(fd, DIOCGSECTORSIZE, &u); if (error != 0) u = 512; #ifdef PC98 secsize = u; #endif error = ioctl(fd, DIOCGMEDIASIZE, &o); if (error == 0) { disksecs = o / u; cyls = dos_cyls = o / (u * dos_heads * dos_sectors); } return (disksecs); } static int read_s0() { #ifdef PC98 if (read_disk(0, (char *) mboot.bootinst) == -1) { warnx("can't read fdisk partition table"); return -1; } if (mboot.signature != BOOT_MAGIC) { warnx("invalid fdisk partition table found"); /* So should we initialize things */ return -1; } #else mboot.bootinst_size = secsize; if (mboot.bootinst != NULL) free(mboot.bootinst); if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { warnx("unable to allocate buffer to read fdisk " "partition table"); return -1; } if (read_disk(0, mboot.bootinst) == -1) { warnx("can't read fdisk partition table"); return -1; } if (*(uint16_t *)(void *)&mboot.bootinst[MBRSIGOFF] != BOOT_MAGIC) { warnx("invalid fdisk partition table found"); /* So should we initialize things */ return -1; } memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts)); #endif return 0; } static int write_s0() { #ifndef PC98 int sector; #endif if (iotest) { print_s0(-1); return 0; } #ifndef PC98 memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts)); #endif /* * write enable label sector before write (if necessary), * disable after writing. * needed if the disklabel protected area also protects * sector 0. (e.g. empty disk) */ #ifdef PC98 if (write_disk(0, (char *) mboot.bootinst) == -1) { warn("can't write fdisk partition table"); return -1; } #else for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) if (write_disk(sector, &mboot.bootinst[sector * secsize]) == -1) { warn("can't write fdisk partition table"); return -1; } #endif return(0); } static int ok(const char *str) { printf("%s [n] ", str); fflush(stdout); if (fgets(lbuf, LBUF, stdin) == NULL) exit(1); lbuf[strlen(lbuf)-1] = 0; if (*lbuf && (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) return 1; else return 0; } static int decimal(const char *str, int *num, int deflt) { int acc = 0, c; char *cp; while (1) { printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); fflush(stdout); if (fgets(lbuf, LBUF, stdin) == NULL) exit(1); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; cp = lbuf; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) return 0; while ((c = *cp++)) { if (c <= '9' && c >= '0') acc = acc * 10 + c - '0'; else break; } if (c == ' ' || c == '\t') while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) { *num = acc; return 1; } else printf("%s is an invalid decimal number. Try again.\n", lbuf); } } #ifdef PC98 static int string(char *str, char **ans) { int i, c; char *cp = lbuf; while (1) { printf("Supply a string value for \"%s\" [%s] ", str, *ans); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (c == '"') { c = *++cp; *ans = cp; while ((c = *cp) && c != '"') cp++; } else { *ans = cp; while ((c = *cp) && c != ' ' && c != '\t') cp++; } for (i = strlen(*ans); i < 16; i++) (*ans)[i] = ' '; (*ans)[16] = 0; return 1; } } #endif static const char * get_type(int type) { int numentries = (sizeof(part_types)/sizeof(struct part_type)); int counter = 0; struct part_type *ptr = part_types; while(counter < numentries) { #ifdef PC98 if(ptr->type == (type & 0x7f)) return(ptr->name); #else if(ptr->type == type) return(ptr->name); #endif ptr++; counter++; } return("unknown"); } #ifndef PC98 static int sanitize_partition(struct dos_partition *partp) { u_int32_t prev_head_boundary, prev_cyl_boundary; u_int32_t max_end, size, start; start = partp->dp_start; size = partp->dp_size; max_end = start + size; /* Only allow a zero size if the partition is being marked unused. */ if (size == 0) { if (start == 0 && partp->dp_typ == 0) return (1); warnx("ERROR: size of partition is zero"); return (0); } /* Return if no adjustment is necessary. */ if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0) return (1); if (start % dos_sectors != 0) warnx("WARNING: partition does not start on a head boundary"); if ((start +size) % dos_sectors != 0) warnx("WARNING: partition does not end on a cylinder boundary"); warnx("WARNING: this may confuse the BIOS or some operating systems"); if (!ok("Correct this automatically?")) return (1); /* * Adjust start upwards, if necessary, to fall on an head boundary. */ if (start % dos_sectors != 0) { prev_head_boundary = start / dos_sectors * dos_sectors; if (max_end < dos_sectors || prev_head_boundary >= max_end - dos_sectors) { /* * Can't go past end of partition */ warnx( "ERROR: unable to adjust start of partition to fall on a head boundary"); return (0); } start = prev_head_boundary + dos_sectors; } /* * Adjust size downwards, if necessary, to fall on a cylinder * boundary. */ prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs; if (prev_cyl_boundary > start) size = prev_cyl_boundary - start; else { warnx("ERROR: could not adjust partition to start on a head boundary\n\ and end on a cylinder boundary."); return (0); } /* Finally, commit any changes to partp and return. */ if (start != partp->dp_start) { warnx("WARNING: adjusting start offset of partition to %u", (u_int)start); partp->dp_start = start; } if (size != partp->dp_size) { warnx("WARNING: adjusting size of partition to %u", (u_int)size); partp->dp_size = size; } return (1); } #endif /* PC98 */ /* * Try figuring out the root device's canonical disk name. * The following choices are considered: * /dev/ad0s1a => /dev/ad0 * /dev/da0a => /dev/da0 * /dev/vinum/root => /dev/vinum/root */ static char * get_rootdisk(void) { struct statfs rootfs; regex_t re; #define NMATCHES 2 regmatch_t rm[NMATCHES]; char *s; int rv; if (statfs("/", &rootfs) == -1) err(1, "statfs(\"/\")"); if ((rv = regcomp(&re, "^(/dev/[a-z]+[0-9]+)([sp][0-9]+)?[a-h]?$", REG_EXTENDED)) != 0) errx(1, "regcomp() failed (%d)", rv); if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0) errx(1, "mounted root fs resource doesn't match expectations (regexec returned %d)", rv); if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL) errx(1, "out of memory"); memcpy(s, rootfs.f_mntfromname + rm[1].rm_so, rm[1].rm_eo - rm[1].rm_so); s[rm[1].rm_eo - rm[1].rm_so] = 0; return s; }