/* * 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. */ #include __FBSDID("$FreeBSD$"); #include #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]; /* * * 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; struct mboot { unsigned char padding[2]; /* force the longs to be long aligned */ unsigned char bootinst[510]; unsigned short int signature; struct pc98_partition parts[8]; unsigned char large_sector_overflow[MAX_SEC_SIZE-MIN_SEC_SIZE]; }; static struct mboot mboot; static int fd; static uint dos_cyls; static uint dos_heads; static uint dos_sectors; static uint dos_cylsecs; #define MAX_ARGS 10 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 */ static int I_flag = 0; /* Inizialize disk to defaults */ static int a_flag = 0; /* set active partition */ 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[] = { {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"} }; 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, int force); 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); static void dos(u_int32_t start, u_int32_t size, struct pc98_partition *partp); static int open_disk(int flag); static ssize_t read_disk(off_t sector, void *buf); static int 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 void usage(void); static int string(const char *str, char **ans); static void reset_boot(void); int main(int argc, char *argv[]) { struct stat sb; int c, i; int partition = -1; struct pc98_partition *partp; while ((c = getopt(argc, argv, "BIa:f:istuv12345678")) != -1) switch (c) { case 'B': B_flag = 1; break; case 'I': I_flag = 1; break; case 'a': a_flag = 1; break; 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': case '5': case '6': case '7': case '8': 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 && argv[0][0] != '/') { /* 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); 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); printf("Part %11s %11s %4s %4s %-16s\n", "Start", "Size", "MID", "SID", "Name"); for (i = 0; i < PC98_NPARTS; i++) { partp = ((struct pc98_partition *) &mboot.parts) + i; if (partp->dp_sid == 0) continue; printf("%4d: %11u %11u 0x%02x 0x%02x %-16.16s\n", i + 1, partp->dp_scyl * cylsecs, (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs, partp->dp_mid, partp->dp_sid, partp->dp_name); } exit(0); } printf("******* Working on device %s *******\n",disk); if (I_flag) { read_s0(); reset_boot(); partp = (struct pc98_partition *) (&mboot.parts[0]); partp->dp_mid = DOSMID_386BSD; partp->dp_sid = DOSSID_386BSD; strncpy(partp->dp_name, "FreeBSD", sizeof(partp->dp_name)); /* Start c/h/s. */ partp->dp_scyl = partp->dp_ipl_cyl = 1; partp->dp_shd = partp->dp_ipl_head = 1; partp->dp_ssect = partp->dp_ipl_sct = 0; /* End c/h/s. */ partp->dp_ecyl = dos_cyls - 1; partp->dp_ehd = dos_cylsecs / dos_sectors; partp->dp_esect = dos_sectors; if (v_flag) print_s0(-1); if (!t_flag) write_s0(); exit(0); } if (f_flag) { 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 <= PC98_NPARTS; i++) change_part(i, v_flag); else change_part(partition, 1); 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 [-BIaistu] [-12345678] [disk]\n", " fdisk -f configfile [-itv] [disk]\n"); exit(1); } static struct pc98_partition mtpart; static int part_unused(int i) { struct pc98_partition *partp; partp = ((struct pc98_partition *) &mboot.parts) + i - 1; return (bcmp(partp, &mtpart, sizeof (struct pc98_partition)) == 0); } static void print_s0(int which) { int i; print_params(); printf("Information from DOS bootblock is:\n"); if (which == -1) { for (i = 1; i <= PC98_NPARTS; i++) if (v_flag || !part_unused(i)) { printf("%d: ", i); print_part(i); } } else print_part(which); } static void print_part(int i) { struct pc98_partition *partp; u_int64_t part_sz, part_mb; if (part_unused(i)) { printf("\n"); return; } /* * Be careful not to overflow. */ partp = ((struct pc98_partition *) &mboot.parts) + i - 1; 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); 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); printf ("\tsystem Name %.16s\n", partp->dp_name); } static void init_boot(void) { mboot.signature = PC98_MAGIC; } static void init_sector0(unsigned long start) { struct pc98_partition *partp = (struct pc98_partition *)(&mboot.parts[0]); init_boot(); partp->dp_mid = DOSMID_386BSD; partp->dp_sid = DOSSID_386BSD; dos(start, disksecs - start, partp); } static void change_part(int i, int force) { struct pc98_partition *partp = ((struct pc98_partition *) &mboot.parts) + i - 1; if (!force && part_unused(i)) return; 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 pc98_partition)); if (i == 1) { init_sector0(1); printf("\nThe static data for the slice 1 has been reinitialized to:\n"); print_part(i); } } do { 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); 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); 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; 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); partp->dp_ecyl = tcyl; partp->dp_esect = tsec; partp->dp_ehd = thd; } else dos(x_start, x_size, partp); 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); if (dos_cyls > 65535 || dos_heads > 255 || dos_sectors > 255) printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); 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) { struct pc98_partition *partp = &mboot.parts[0]; int active, i, new, tmp; active = -1; for (i = 0; i < PC98_NPARTS; i++) { if ((partp[i].dp_sid & PC98_SID_ACTIVE) == 0) continue; printf("Partition %d is marked active\n", i + 1); if (active == -1) active = i + 1; } if (a_flag && which != -1) active = which; else if (active == -1) active = 1; if (!ok("Do you want to change the active partition?")) return; setactive: do { new = active; Decimal("active partition", new, tmp); if (new < 1 || new > 8) { printf("Active partition number must be in range 1-8." " Try again.\n"); goto setactive; } active = new; } while (!ok("Are you happy with this choice")); if (active > 0 && active <= 8) partp[active-1].dp_sid |= PC98_SID_ACTIVE; } 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 * \***********************************************/ static void dos(u_int32_t start, u_int32_t size, struct pc98_partition *partp) { u_int32_t end; if (partp->dp_mid == 0 && partp->dp_sid == 0 && start == 0 && size == 0) { memcpy(partp, &mtpart, sizeof(*partp)); return; } /* Start c/h/s. */ partp->dp_scyl = partp->dp_ipl_cyl = start / dos_cylsecs; partp->dp_shd = partp->dp_ipl_head = start % dos_cylsecs / dos_sectors; partp->dp_ssect = partp->dp_ipl_sct = start % dos_sectors; /* End c/h/s. */ end = start + size - cylsecs; partp->dp_ecyl = end / dos_cylsecs; partp->dp_ehd = end % dos_cylsecs / dos_sectors; partp->dp_esect = end % dos_sectors; } static int open_disk(int flag) { struct stat st; int rwmode; 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); rwmode = I_flag || a_flag || B_flag || flag ? O_RDWR : O_RDONLY; fd = open(disk, rwmode); if (fd == -1 && errno == EPERM && rwmode == O_RDWR) fd = open(disk, O_RDONLY); if (fd == -1 && errno == ENXIO) return -2; if (fd == -1) { warnx("can't open device %s", disk); return -1; } 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); return read(fd, buf, secsize > MIN_SEC_SIZE ? secsize : MIN_SEC_SIZE * 2); } static int write_disk(off_t sector, void *buf) { int error; struct gctl_req *grq; const char *q; char fbuf[BUFSIZ]; int i, fdw, sz; sz = secsize > MIN_SEC_SIZE ? secsize : MIN_SEC_SIZE * 2; grq = gctl_get_handle(); gctl_ro_param(grq, "verb", -1, "write PC98"); gctl_ro_param(grq, "class", -1, "PC98"); q = strrchr(disk, '/'); if (q == NULL) q = disk; else q++; gctl_ro_param(grq, "geom", -1, q); gctl_ro_param(grq, "data", sz, buf); q = gctl_issue(grq); if (q == NULL) { gctl_free(grq); return(0); } warnx("Geom problem: %s", q); gctl_free(grq); warnx("Warning: Partitioning via geom failed, trying raw write"); error = pwrite(fd, buf, sz, sector * 512); if (error == sz) return (0); for (i = 0; i < PC98_NPARTS; i++) { sprintf(fbuf, "%ss%d", disk, i + 1); fdw = open(fbuf, O_RDWR, 0); if (fdw < 0) continue; error = ioctl(fdw, DIOCSPC98, buf); close(fdw); if (error == 0) return (0); } warnx("Failed to write sector zero"); return(EINVAL); } static int get_params() { int error; u_int u; off_t o; error = ioctl(fd, DIOCGFWSECTORS, &u); if (error == 0) sectors = dos_sectors = u; else sectors = dos_sectors = 17; error = ioctl(fd, DIOCGFWHEADS, &u); if (error == 0) heads = dos_heads = u; else heads = dos_heads = 8; dos_cylsecs = cylsecs = heads * sectors; disksecs = cyls * heads * sectors; error = ioctl(fd, DIOCGSECTORSIZE, &u); if (error != 0 || u == 0) u = 512; secsize = u; 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() { if (read_disk(0, (char *) mboot.bootinst) == -1) { warnx("can't read fdisk partition table"); return -1; } if (mboot.signature != PC98_MAGIC) { warnx("invalid fdisk partition table found"); /* So should we initialize things */ return -1; } return 0; } static int write_s0() { if (iotest) { print_s0(-1); return 0; } /* * 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) */ if (write_disk(0, (char *) mboot.bootinst) == -1) { warn("can't write fdisk partition table"); return -1; } 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); } } static int string(const 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; } } 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) { if(ptr->type == (type & 0x7f)) return(ptr->name); ptr++; counter++; } return("unknown"); } /* * 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; } static void reset_boot(void) { int i; struct pc98_partition *partp; init_boot(); for (i = 1; i <= PC98_NPARTS; i++) { partp = ((struct pc98_partition *) &mboot.parts) + i - 1; bzero((char *)partp, sizeof (struct pc98_partition)); } }