diff options
Diffstat (limited to 'sbin/newfs_msdos/newfs_msdos.c')
-rw-r--r-- | sbin/newfs_msdos/newfs_msdos.c | 837 |
1 files changed, 2 insertions, 835 deletions
diff --git a/sbin/newfs_msdos/newfs_msdos.c b/sbin/newfs_msdos/newfs_msdos.c index a399425..79529f2 100644 --- a/sbin/newfs_msdos/newfs_msdos.c +++ b/sbin/newfs_msdos/newfs_msdos.c @@ -31,233 +31,24 @@ static const char rcsid[] = #endif /* not lint */ #include <sys/param.h> -#include <sys/fdcio.h> -#include <sys/disk.h> -#include <sys/disklabel.h> -#include <sys/mount.h> -#include <sys/stat.h> -#include <sys/time.h> -#include <ctype.h> #include <err.h> #include <errno.h> -#include <fcntl.h> -#include <inttypes.h> #include <paths.h> -#include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <time.h> #include <unistd.h> -#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ -#define BPN 4 /* bits per nibble */ -#define NPB 2 /* nibbles per byte */ - -#define DOSMAGIC 0xaa55 /* DOS magic number */ -#define MINBPS 512 /* minimum bytes per sector */ -#define MAXSPC 128 /* maximum sectors per cluster */ -#define MAXNFT 16 /* maximum number of FATs */ -#define DEFBLK 4096 /* default block size */ -#define DEFBLK16 2048 /* default block size FAT16 */ -#define DEFRDE 512 /* default root directory entries */ -#define RESFTE 2 /* reserved FAT entries */ -#define MINCLS12 1U /* minimum FAT12 clusters */ -#define MINCLS16 0xff5U /* minimum FAT16 clusters */ -#define MINCLS32 0xfff5U /* minimum FAT32 clusters */ -#define MAXCLS12 0xff4U /* maximum FAT12 clusters */ -#define MAXCLS16 0xfff4U /* maximum FAT16 clusters */ -#define MAXCLS32 0xffffff4U /* maximum FAT32 clusters */ - -#define mincls(fat) ((fat) == 12 ? MINCLS12 : \ - (fat) == 16 ? MINCLS16 : \ - MINCLS32) - -#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ - (fat) == 16 ? MAXCLS16 : \ - MAXCLS32) - -#define mk1(p, x) \ - (p) = (u_int8_t)(x) - -#define mk2(p, x) \ - (p)[0] = (u_int8_t)(x), \ - (p)[1] = (u_int8_t)((x) >> 010) - -#define mk4(p, x) \ - (p)[0] = (u_int8_t)(x), \ - (p)[1] = (u_int8_t)((x) >> 010), \ - (p)[2] = (u_int8_t)((x) >> 020), \ - (p)[3] = (u_int8_t)((x) >> 030) +#include "mkfs_msdos.h" #define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) #define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) #define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) #define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) -struct bs { - u_int8_t bsJump[3]; /* bootstrap entry point */ - u_int8_t bsOemName[8]; /* OEM name and version */ -} __packed; - -struct bsbpb { - u_int8_t bpbBytesPerSec[2]; /* bytes per sector */ - u_int8_t bpbSecPerClust; /* sectors per cluster */ - u_int8_t bpbResSectors[2]; /* reserved sectors */ - u_int8_t bpbFATs; /* number of FATs */ - u_int8_t bpbRootDirEnts[2]; /* root directory entries */ - u_int8_t bpbSectors[2]; /* total sectors */ - u_int8_t bpbMedia; /* media descriptor */ - u_int8_t bpbFATsecs[2]; /* sectors per FAT */ - u_int8_t bpbSecPerTrack[2]; /* sectors per track */ - u_int8_t bpbHeads[2]; /* drive heads */ - u_int8_t bpbHiddenSecs[4]; /* hidden sectors */ - u_int8_t bpbHugeSectors[4]; /* big total sectors */ -} __packed; - -struct bsxbpb { - u_int8_t bpbBigFATsecs[4]; /* big sectors per FAT */ - u_int8_t bpbExtFlags[2]; /* FAT control flags */ - u_int8_t bpbFSVers[2]; /* file system version */ - u_int8_t bpbRootClust[4]; /* root directory start cluster */ - u_int8_t bpbFSInfo[2]; /* file system info sector */ - u_int8_t bpbBackup[2]; /* backup boot sector */ - u_int8_t bpbReserved[12]; /* reserved */ -} __packed; - -struct bsx { - u_int8_t exDriveNumber; /* drive number */ - u_int8_t exReserved1; /* reserved */ - u_int8_t exBootSignature; /* extended boot signature */ - u_int8_t exVolumeID[4]; /* volume ID number */ - u_int8_t exVolumeLabel[11]; /* volume label */ - u_int8_t exFileSysType[8]; /* file system type */ -} __packed; - -struct de { - u_int8_t deName[11]; /* name and extension */ - u_int8_t deAttributes; /* attributes */ - u_int8_t rsvd[10]; /* reserved */ - u_int8_t deMTime[2]; /* last-modified time */ - u_int8_t deMDate[2]; /* last-modified date */ - u_int8_t deStartCluster[2]; /* starting cluster */ - u_int8_t deFileSize[4]; /* size */ -} __packed; - -struct bpb { - u_int bpbBytesPerSec; /* bytes per sector */ - u_int bpbSecPerClust; /* sectors per cluster */ - u_int bpbResSectors; /* reserved sectors */ - u_int bpbFATs; /* number of FATs */ - u_int bpbRootDirEnts; /* root directory entries */ - u_int bpbSectors; /* total sectors */ - u_int bpbMedia; /* media descriptor */ - u_int bpbFATsecs; /* sectors per FAT */ - u_int bpbSecPerTrack; /* sectors per track */ - u_int bpbHeads; /* drive heads */ - u_int bpbHiddenSecs; /* hidden sectors */ - u_int bpbHugeSectors; /* big total sectors */ - u_int bpbBigFATsecs; /* big sectors per FAT */ - u_int bpbRootClust; /* root directory start cluster */ - u_int bpbFSInfo; /* file system info sector */ - u_int bpbBackup; /* backup boot sector */ -}; - -#define BPBGAP 0, 0, 0, 0, 0, 0 - -static struct { - const char *name; - struct bpb bpb; -} const stdfmt[] = { - {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}}, - {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}}, - {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}}, - {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}}, - {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}}, - {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}}, - {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}}, - {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}}, - {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}}, - {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}} -}; - -static const u_int8_t bootcode[] = { - 0xfa, /* cli */ - 0x31, 0xc0, /* xor ax,ax */ - 0x8e, 0xd0, /* mov ss,ax */ - 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ - 0xfb, /* sti */ - 0x8e, 0xd8, /* mov ds,ax */ - 0xe8, 0x00, 0x00, /* call $ + 3 */ - 0x5e, /* pop si */ - 0x83, 0xc6, 0x19, /* add si,+19h */ - 0xbb, 0x07, 0x00, /* mov bx,0007h */ - 0xfc, /* cld */ - 0xac, /* lodsb */ - 0x84, 0xc0, /* test al,al */ - 0x74, 0x06, /* jz $ + 8 */ - 0xb4, 0x0e, /* mov ah,0eh */ - 0xcd, 0x10, /* int 10h */ - 0xeb, 0xf5, /* jmp $ - 9 */ - 0x30, 0xe4, /* xor ah,ah */ - 0xcd, 0x16, /* int 16h */ - 0xcd, 0x19, /* int 19h */ - 0x0d, 0x0a, - 'N', 'o', 'n', '-', 's', 'y', 's', 't', - 'e', 'm', ' ', 'd', 'i', 's', 'k', - 0x0d, 0x0a, - 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', - 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', - ' ', 'r', 'e', 'b', 'o', 'o', 't', - 0x0d, 0x0a, - 0 -}; - -struct msdos_options { - const char *bootstrap; - const char *volume_label; - const char *OEM_string; - const char *floppy; - u_int fat_type; - u_int volume_id; - u_int bytes_per_sector; - u_int sectors_per_fat; - u_int block_size; - u_int sectors_per_cluster; - u_int directory_entries; - u_int drive_heads; - u_int info_sector; - u_int backup_sector; - u_int media_descriptor; - u_int num_FAT; - u_int hidden_sectors; - u_int reserved_sectors; - u_int size; - u_int sectors_per_track; - int no_create; - off_t create_size; - off_t offset; - int volume_id_set; - int media_descriptor_set; - int hidden_sectors_set; -}; - -static volatile sig_atomic_t got_siginfo; -static void infohandler(int); - -static void check_mounted(const char *, mode_t); -static void getstdfmt(const char *, struct bpb *); -static void getdiskinfo(int, const char *, const char *, int, - struct bpb *); -static void print_bpb(struct bpb *); -static u_int ckgeom(const char *, u_int, const char *); static u_int argtou(const char *, u_int, u_int, const char *); static off_t argtooff(const char *, const char *); -static int oklabel(const char *); -static int mkfs_msdos(const char *, const char *, const struct msdos_options *); -static void mklabel(u_int8_t *, const char *); -static void setstr(u_int8_t *, const char *, size_t); static void usage(void); /* @@ -300,13 +91,9 @@ main(int argc, char *argv[]) o.volume_id_set = 1; break; case 'L': - if (!oklabel(optarg)) - errx(1, "%s: bad volume label", optarg); o.volume_label = optarg; break; case 'O': - if (strlen(optarg) > 8) - errx(1, "%s: bad OEM string", optarg); o.OEM_string = optarg; break; case 'S': @@ -375,579 +162,6 @@ main(int argc, char *argv[]) return mkfs_msdos(fname, dtype, &o); } -int mkfs_msdos(const char *fname, const char *dtype, - const struct msdos_options *op) -{ - char buf[MAXPATHLEN]; - struct sigaction si_sa; - struct stat sb; - struct timeval tv; - struct bpb bpb; - struct tm *tm; - struct bs *bs; - struct bsbpb *bsbpb; - struct bsxbpb *bsxbpb; - struct bsx *bsx; - struct de *de; - u_int8_t *img; - const char *bname; - ssize_t n; - time_t now; - u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; - int fd, fd1; - struct msdos_options o = *op; - - if (o.create_size) { - if (o.no_create) - errx(1, "create (-C) is incompatible with -N"); - fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); - if (fd == -1) - errx(1, "failed to create %s", fname); - if (ftruncate(fd, o.create_size)) - errx(1, "failed to initialize %jd bytes", (intmax_t)o.create_size); - } else if ((fd = open(fname, o.no_create ? O_RDONLY : O_RDWR)) == -1) - err(1, "%s", fname); - if (fstat(fd, &sb)) - err(1, "%s", fname); - if (o.create_size) { - if (!S_ISREG(sb.st_mode)) - warnx("warning, %s is not a regular file", fname); - } else { - if (!S_ISCHR(sb.st_mode)) - warnx("warning, %s is not a character device", fname); - } - if (!o.no_create) - check_mounted(fname, sb.st_mode); - if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) - errx(1, "cannot seek to %jd", (intmax_t)o.offset); - memset(&bpb, 0, sizeof(bpb)); - if (o.floppy) { - getstdfmt(o.floppy, &bpb); - bpb.bpbHugeSectors = bpb.bpbSectors; - bpb.bpbSectors = 0; - bpb.bpbBigFATsecs = bpb.bpbFATsecs; - bpb.bpbFATsecs = 0; - } - if (o.drive_heads) - bpb.bpbHeads = o.drive_heads; - if (o.sectors_per_track) - bpb.bpbSecPerTrack = o.sectors_per_track; - if (o.bytes_per_sector) - bpb.bpbBytesPerSec = o.bytes_per_sector; - if (o.size) - bpb.bpbHugeSectors = o.size; - if (o.hidden_sectors_set) - bpb.bpbHiddenSecs = o.hidden_sectors; - if (!(o.floppy || (o.drive_heads && o.sectors_per_track && o.bytes_per_sector && o.size && o.hidden_sectors_set))) { - off_t delta; - getdiskinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb); - bpb.bpbHugeSectors -= (o.offset / bpb.bpbBytesPerSec); - delta = bpb.bpbHugeSectors % bpb.bpbSecPerTrack; - if (delta != 0) { - warnx("trim %d sectors to adjust to a multiple of %d", - (int)delta, bpb.bpbSecPerTrack); - bpb.bpbHugeSectors -= delta; - } - if (bpb.bpbSecPerClust == 0) { /* set defaults */ - if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */ - bpb.bpbSecPerClust = 1; - else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */ - bpb.bpbSecPerClust = 8; - else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */ - bpb.bpbSecPerClust = 16; - else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */ - bpb.bpbSecPerClust = 32; - else - bpb.bpbSecPerClust = 64; /* otherwise 32k */ - } - } - if (!powerof2(bpb.bpbBytesPerSec)) - errx(1, "bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec); - if (bpb.bpbBytesPerSec < MINBPS) - errx(1, "bytes/sector (%u) is too small; minimum is %u", - bpb.bpbBytesPerSec, MINBPS); - if (!(fat = o.fat_type)) { - if (o.floppy) - fat = 12; - else if (!o.directory_entries && (o.info_sector || o.backup_sector)) - fat = 32; - } - if ((fat == 32 && o.directory_entries) || (fat != 32 && (o.info_sector || o.backup_sector))) - errx(1, "-%c is not a legal FAT%s option", - fat == 32 ? 'e' : o.info_sector ? 'i' : 'k', - fat == 32 ? "32" : "12/16"); - if (o.floppy && fat == 32) - bpb.bpbRootDirEnts = 0; - if (o.block_size) { - if (!powerof2(o.block_size)) - errx(1, "block size (%u) is not a power of 2", o.block_size); - if (o.block_size < bpb.bpbBytesPerSec) - errx(1, "block size (%u) is too small; minimum is %u", - o.block_size, bpb.bpbBytesPerSec); - if (o.block_size > bpb.bpbBytesPerSec * MAXSPC) - errx(1, "block size (%u) is too large; maximum is %u", - o.block_size, bpb.bpbBytesPerSec * MAXSPC); - bpb.bpbSecPerClust = o.block_size / bpb.bpbBytesPerSec; - } - if (o.sectors_per_cluster) { - if (!powerof2(o.sectors_per_cluster)) - errx(1, "sectors/cluster (%u) is not a power of 2", o.sectors_per_cluster); - bpb.bpbSecPerClust = o.sectors_per_cluster; - } - if (o.reserved_sectors) - bpb.bpbResSectors = o.reserved_sectors; - if (o.num_FAT) { - if (o.num_FAT > MAXNFT) - errx(1, "number of FATs (%u) is too large; maximum is %u", - o.num_FAT, MAXNFT); - bpb.bpbFATs = o.num_FAT; - } - if (o.directory_entries) - bpb.bpbRootDirEnts = o.directory_entries; - if (o.media_descriptor_set) { - if (o.media_descriptor < 0xf0) - errx(1, "illegal media descriptor (%#x)", o.media_descriptor); - bpb.bpbMedia = o.media_descriptor; - } - if (o.sectors_per_fat) - bpb.bpbBigFATsecs = o.sectors_per_fat; - if (o.info_sector) - bpb.bpbFSInfo = o.info_sector; - if (o.backup_sector) - bpb.bpbBackup = o.backup_sector; - bss = 1; - bname = NULL; - fd1 = -1; - if (o.bootstrap) { - bname = o.bootstrap; - if (!strchr(bname, '/')) { - snprintf(buf, sizeof(buf), "/boot/%s", bname); - if (!(bname = strdup(buf))) - err(1, NULL); - } - if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) - err(1, "%s", bname); - if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bpbBytesPerSec || - sb.st_size < bpb.bpbBytesPerSec || - sb.st_size > bpb.bpbBytesPerSec * MAXU16) - errx(1, "%s: inappropriate file type or format", bname); - bss = sb.st_size / bpb.bpbBytesPerSec; - } - if (!bpb.bpbFATs) - bpb.bpbFATs = 2; - if (!fat) { - if (bpb.bpbHugeSectors < (bpb.bpbResSectors ? bpb.bpbResSectors : bss) + - howmany((RESFTE + (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1)) * - (bpb.bpbSecPerClust ? 16 : 12) / BPN, - bpb.bpbBytesPerSec * NPB) * - bpb.bpbFATs + - howmany(bpb.bpbRootDirEnts ? bpb.bpbRootDirEnts : DEFRDE, - bpb.bpbBytesPerSec / sizeof(struct de)) + - (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1) * - (bpb.bpbSecPerClust ? bpb.bpbSecPerClust : - howmany(DEFBLK, bpb.bpbBytesPerSec))) - fat = 12; - else if (bpb.bpbRootDirEnts || bpb.bpbHugeSectors < - (bpb.bpbResSectors ? bpb.bpbResSectors : bss) + - howmany((RESFTE + MAXCLS16) * 2, bpb.bpbBytesPerSec) * - bpb.bpbFATs + - howmany(DEFRDE, bpb.bpbBytesPerSec / sizeof(struct de)) + - (MAXCLS16 + 1) * - (bpb.bpbSecPerClust ? bpb.bpbSecPerClust : - howmany(8192, bpb.bpbBytesPerSec))) - fat = 16; - else - fat = 32; - } - x = bss; - if (fat == 32) { - if (!bpb.bpbFSInfo) { - if (x == MAXU16 || x == bpb.bpbBackup) - errx(1, "no room for info sector"); - bpb.bpbFSInfo = x; - } - if (bpb.bpbFSInfo != MAXU16 && x <= bpb.bpbFSInfo) - x = bpb.bpbFSInfo + 1; - if (!bpb.bpbBackup) { - if (x == MAXU16) - errx(1, "no room for backup sector"); - bpb.bpbBackup = x; - } else if (bpb.bpbBackup != MAXU16 && bpb.bpbBackup == bpb.bpbFSInfo) - errx(1, "backup sector would overwrite info sector"); - if (bpb.bpbBackup != MAXU16 && x <= bpb.bpbBackup) - x = bpb.bpbBackup + 1; - } - if (!bpb.bpbResSectors) - bpb.bpbResSectors = fat == 32 ? - MAX(x, MAX(16384 / bpb.bpbBytesPerSec, 4)) : x; - else if (bpb.bpbResSectors < x) - errx(1, "too few reserved sectors (need %d have %d)", x, - bpb.bpbResSectors); - if (fat != 32 && !bpb.bpbRootDirEnts) - bpb.bpbRootDirEnts = DEFRDE; - rds = howmany(bpb.bpbRootDirEnts, bpb.bpbBytesPerSec / sizeof(struct de)); - if (!bpb.bpbSecPerClust) - for (bpb.bpbSecPerClust = howmany(fat == 16 ? DEFBLK16 : - DEFBLK, bpb.bpbBytesPerSec); - bpb.bpbSecPerClust < MAXSPC && - bpb.bpbResSectors + - howmany((RESFTE + maxcls(fat)) * (fat / BPN), - bpb.bpbBytesPerSec * NPB) * - bpb.bpbFATs + - rds + - (u_int64_t) (maxcls(fat) + 1) * - bpb.bpbSecPerClust <= bpb.bpbHugeSectors; - bpb.bpbSecPerClust <<= 1) - continue; - if (fat != 32 && bpb.bpbBigFATsecs > MAXU16) - errx(1, "too many sectors/FAT for FAT12/16"); - x1 = bpb.bpbResSectors + rds; - x = bpb.bpbBigFATsecs ? bpb.bpbBigFATsecs : 1; - if (x1 + (u_int64_t)x * bpb.bpbFATs > bpb.bpbHugeSectors) - errx(1, "meta data exceeds file system size"); - x1 += x * bpb.bpbFATs; - x = (u_int64_t)(bpb.bpbHugeSectors - x1) * bpb.bpbBytesPerSec * NPB / - (bpb.bpbSecPerClust * bpb.bpbBytesPerSec * NPB + fat / - BPN * bpb.bpbFATs); - x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), - bpb.bpbBytesPerSec * NPB); - if (!bpb.bpbBigFATsecs) { - bpb.bpbBigFATsecs = x2; - x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs; - } - cls = (bpb.bpbHugeSectors - x1) / bpb.bpbSecPerClust; - x = (u_int64_t)bpb.bpbBigFATsecs * bpb.bpbBytesPerSec * NPB / (fat / BPN) - - RESFTE; - if (cls > x) - cls = x; - if (bpb.bpbBigFATsecs < x2) - warnx("warning: sectors/FAT limits file system to %u clusters", - cls); - if (cls < mincls(fat)) - errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, - mincls(fat)); - if (cls > maxcls(fat)) { - cls = maxcls(fat); - bpb.bpbHugeSectors = x1 + (cls + 1) * bpb.bpbSecPerClust - 1; - warnx("warning: FAT type limits file system to %u sectors", - bpb.bpbHugeSectors); - } - printf("%s: %u sector%s in %u FAT%u cluster%s " - "(%u bytes/cluster)\n", fname, cls * bpb.bpbSecPerClust, - cls * bpb.bpbSecPerClust == 1 ? "" : "s", cls, fat, - cls == 1 ? "" : "s", bpb.bpbBytesPerSec * bpb.bpbSecPerClust); - if (!bpb.bpbMedia) - bpb.bpbMedia = !bpb.bpbHiddenSecs ? 0xf0 : 0xf8; - if (fat == 32) - bpb.bpbRootClust = RESFTE; - if (bpb.bpbHiddenSecs + bpb.bpbHugeSectors <= MAXU16) { - bpb.bpbSectors = bpb.bpbHugeSectors; - bpb.bpbHugeSectors = 0; - } - if (fat != 32) { - bpb.bpbFATsecs = bpb.bpbBigFATsecs; - bpb.bpbBigFATsecs = 0; - } - print_bpb(&bpb); - if (!o.no_create) { - gettimeofday(&tv, NULL); - now = tv.tv_sec; - tm = localtime(&now); - if (!(img = malloc(bpb.bpbBytesPerSec))) - err(1, NULL); - dir = bpb.bpbResSectors + (bpb.bpbFATsecs ? bpb.bpbFATsecs : - bpb.bpbBigFATsecs) * bpb.bpbFATs; - memset(&si_sa, 0, sizeof(si_sa)); - si_sa.sa_handler = infohandler; - if (sigaction(SIGINFO, &si_sa, NULL) == -1) - err(1, "sigaction SIGINFO"); - for (lsn = 0; lsn < dir + (fat == 32 ? bpb.bpbSecPerClust : rds); lsn++) { - if (got_siginfo) { - fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n", - fname, lsn, - (dir + (fat == 32 ? bpb.bpbSecPerClust: rds)), - (lsn * 100) / (dir + - (fat == 32 ? bpb.bpbSecPerClust: rds))); - got_siginfo = 0; - } - x = lsn; - if (o.bootstrap && - fat == 32 && bpb.bpbBackup != MAXU16 && - bss <= bpb.bpbBackup && x >= bpb.bpbBackup) { - x -= bpb.bpbBackup; - if (!x && lseek(fd1, o.offset, SEEK_SET)) - err(1, "%s", bname); - } - if (o.bootstrap && x < bss) { - if ((n = read(fd1, img, bpb.bpbBytesPerSec)) == -1) - err(1, "%s", bname); - if ((unsigned)n != bpb.bpbBytesPerSec) - errx(1, "%s: can't read sector %u", bname, x); - } else - memset(img, 0, bpb.bpbBytesPerSec); - if (!lsn || - (fat == 32 && bpb.bpbBackup != MAXU16 && - lsn == bpb.bpbBackup)) { - x1 = sizeof(struct bs); - bsbpb = (struct bsbpb *)(img + x1); - mk2(bsbpb->bpbBytesPerSec, bpb.bpbBytesPerSec); - mk1(bsbpb->bpbSecPerClust, bpb.bpbSecPerClust); - mk2(bsbpb->bpbResSectors, bpb.bpbResSectors); - mk1(bsbpb->bpbFATs, bpb.bpbFATs); - mk2(bsbpb->bpbRootDirEnts, bpb.bpbRootDirEnts); - mk2(bsbpb->bpbSectors, bpb.bpbSectors); - mk1(bsbpb->bpbMedia, bpb.bpbMedia); - mk2(bsbpb->bpbFATsecs, bpb.bpbFATsecs); - mk2(bsbpb->bpbSecPerTrack, bpb.bpbSecPerTrack); - mk2(bsbpb->bpbHeads, bpb.bpbHeads); - mk4(bsbpb->bpbHiddenSecs, bpb.bpbHiddenSecs); - mk4(bsbpb->bpbHugeSectors, bpb.bpbHugeSectors); - x1 += sizeof(struct bsbpb); - if (fat == 32) { - bsxbpb = (struct bsxbpb *)(img + x1); - mk4(bsxbpb->bpbBigFATsecs, bpb.bpbBigFATsecs); - mk2(bsxbpb->bpbExtFlags, 0); - mk2(bsxbpb->bpbFSVers, 0); - mk4(bsxbpb->bpbRootClust, bpb.bpbRootClust); - mk2(bsxbpb->bpbFSInfo, bpb.bpbFSInfo); - mk2(bsxbpb->bpbBackup, bpb.bpbBackup); - x1 += sizeof(struct bsxbpb); - } - bsx = (struct bsx *)(img + x1); - mk1(bsx->exBootSignature, 0x29); - if (o.volume_id_set) - x = o.volume_id; - else - x = (((u_int)(1 + tm->tm_mon) << 8 | - (u_int)tm->tm_mday) + - ((u_int)tm->tm_sec << 8 | - (u_int)(tv.tv_usec / 10))) << 16 | - ((u_int)(1900 + tm->tm_year) + - ((u_int)tm->tm_hour << 8 | - (u_int)tm->tm_min)); - mk4(bsx->exVolumeID, x); - mklabel(bsx->exVolumeLabel, o.volume_label ? o.volume_label : "NO NAME"); - sprintf(buf, "FAT%u", fat); - setstr(bsx->exFileSysType, buf, sizeof(bsx->exFileSysType)); - if (!o.bootstrap) { - x1 += sizeof(struct bsx); - bs = (struct bs *)img; - mk1(bs->bsJump[0], 0xeb); - mk1(bs->bsJump[1], x1 - 2); - mk1(bs->bsJump[2], 0x90); - setstr(bs->bsOemName, o.OEM_string ? o.OEM_string : "BSD4.4 ", - sizeof(bs->bsOemName)); - memcpy(img + x1, bootcode, sizeof(bootcode)); - mk2(img + MINBPS - 2, DOSMAGIC); - } - } else if (fat == 32 && bpb.bpbFSInfo != MAXU16 && - (lsn == bpb.bpbFSInfo || - (bpb.bpbBackup != MAXU16 && - lsn == bpb.bpbBackup + bpb.bpbFSInfo))) { - mk4(img, 0x41615252); - mk4(img + MINBPS - 28, 0x61417272); - mk4(img + MINBPS - 24, 0xffffffff); - mk4(img + MINBPS - 20, bpb.bpbRootClust); - mk2(img + MINBPS - 2, DOSMAGIC); - } else if (lsn >= bpb.bpbResSectors && lsn < dir && - !((lsn - bpb.bpbResSectors) % - (bpb.bpbFATsecs ? bpb.bpbFATsecs : - bpb.bpbBigFATsecs))) { - mk1(img[0], bpb.bpbMedia); - for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) - mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); - } else if (lsn == dir && o.volume_label) { - de = (struct de *)img; - mklabel(de->deName, o.volume_label); - mk1(de->deAttributes, 050); - x = (u_int)tm->tm_hour << 11 | - (u_int)tm->tm_min << 5 | - (u_int)tm->tm_sec >> 1; - mk2(de->deMTime, x); - x = (u_int)(tm->tm_year - 80) << 9 | - (u_int)(tm->tm_mon + 1) << 5 | - (u_int)tm->tm_mday; - mk2(de->deMDate, x); - } - if ((n = write(fd, img, bpb.bpbBytesPerSec)) == -1) - err(1, "%s", fname); - if ((unsigned)n != bpb.bpbBytesPerSec) - errx(1, "%s: can't write sector %u", fname, lsn); - } - } - return 0; -} - -/* - * Exit with error if file system is mounted. - */ -static void -check_mounted(const char *fname, mode_t mode) -{ - struct statfs *mp; - const char *s1, *s2; - size_t len; - int n, r; - - if (!(n = getmntinfo(&mp, MNT_NOWAIT))) - err(1, "getmntinfo"); - len = strlen(_PATH_DEV); - s1 = fname; - if (!strncmp(s1, _PATH_DEV, len)) - s1 += len; - r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; - for (; n--; mp++) { - s2 = mp->f_mntfromname; - if (!strncmp(s2, _PATH_DEV, len)) - s2 += len; - if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || - !strcmp(s1, s2)) - errx(1, "%s is mounted on %s", fname, mp->f_mntonname); - } -} - -/* - * Get a standard format. - */ -static void -getstdfmt(const char *fmt, struct bpb *bpb) -{ - u_int x, i; - - x = sizeof(stdfmt) / sizeof(stdfmt[0]); - for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); - if (i == x) - errx(1, "%s: unknown standard format", fmt); - *bpb = stdfmt[i].bpb; -} - -/* - * Get disk slice, partition, and geometry information. - */ -static void -getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag, - struct bpb *bpb) -{ - struct disklabel *lp, dlp; - struct fd_type type; - off_t ms, hs = 0; - - lp = NULL; - - /* If the user specified a disk type, try to use that */ - if (dtype != NULL) { - lp = getdiskbyname(dtype); - } - - /* Maybe it's a floppy drive */ - if (lp == NULL) { - if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) { - struct stat st; - - if (fstat(fd, &st)) - err(1, "cannot get disk size"); - /* create a fake geometry for a file image */ - ms = st.st_size; - dlp.d_secsize = 512; - dlp.d_nsectors = 63; - dlp.d_ntracks = 255; - dlp.d_secperunit = ms / dlp.d_secsize; - lp = &dlp; - } else if (ioctl(fd, FD_GTYPE, &type) != -1) { - dlp.d_secsize = 128 << type.secsize; - dlp.d_nsectors = type.sectrac; - dlp.d_ntracks = type.heads; - dlp.d_secperunit = ms / dlp.d_secsize; - lp = &dlp; - } - } - - /* Maybe it's a fixed drive */ - if (lp == NULL) { - if (bpb->bpbBytesPerSec) - dlp.d_secsize = bpb->bpbBytesPerSec; - if (bpb->bpbBytesPerSec == 0 && ioctl(fd, DIOCGSECTORSIZE, - &dlp.d_secsize) == -1) - err(1, "cannot get sector size"); - - dlp.d_secperunit = ms / dlp.d_secsize; - - if (bpb->bpbSecPerTrack == 0 && ioctl(fd, DIOCGFWSECTORS, - &dlp.d_nsectors) == -1) { - warn("cannot get number of sectors per track"); - dlp.d_nsectors = 63; - } - if (bpb->bpbHeads == 0 && - ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) { - warn("cannot get number of heads"); - if (dlp.d_secperunit <= 63*1*1024) - dlp.d_ntracks = 1; - else if (dlp.d_secperunit <= 63*16*1024) - dlp.d_ntracks = 16; - else - dlp.d_ntracks = 255; - } - - hs = (ms / dlp.d_secsize) - dlp.d_secperunit; - lp = &dlp; - } - - if (bpb->bpbBytesPerSec == 0) - bpb->bpbBytesPerSec = ckgeom(fname, lp->d_secsize, "bytes/sector"); - if (bpb->bpbSecPerTrack == 0) - bpb->bpbSecPerTrack = ckgeom(fname, lp->d_nsectors, "sectors/track"); - if (bpb->bpbHeads == 0) - bpb->bpbHeads = ckgeom(fname, lp->d_ntracks, "drive heads"); - if (bpb->bpbHugeSectors == 0) - bpb->bpbHugeSectors = lp->d_secperunit; - if (bpb->bpbHiddenSecs == 0) - bpb->bpbHiddenSecs = hs; -} - -/* - * Print out BPB values. - */ -static void -print_bpb(struct bpb *bpb) -{ - printf("BytesPerSec=%u SecPerClust=%u ResSectors=%u FATs=%u", - bpb->bpbBytesPerSec, bpb->bpbSecPerClust, bpb->bpbResSectors, - bpb->bpbFATs); - if (bpb->bpbRootDirEnts) - printf(" RootDirEnts=%u", bpb->bpbRootDirEnts); - if (bpb->bpbSectors) - printf(" Sectors=%u", bpb->bpbSectors); - printf(" Media=%#x", bpb->bpbMedia); - if (bpb->bpbFATsecs) - printf(" FATsecs=%u", bpb->bpbFATsecs); - printf(" SecPerTrack=%u Heads=%u HiddenSecs=%u", bpb->bpbSecPerTrack, - bpb->bpbHeads, bpb->bpbHiddenSecs); - if (bpb->bpbHugeSectors) - printf(" HugeSectors=%u", bpb->bpbHugeSectors); - if (!bpb->bpbFATsecs) { - printf(" FATsecs=%u RootCluster=%u", bpb->bpbBigFATsecs, - bpb->bpbRootClust); - printf(" FSInfo="); - printf(bpb->bpbFSInfo == MAXU16 ? "%#x" : "%u", bpb->bpbFSInfo); - printf(" Backup="); - printf(bpb->bpbBackup == MAXU16 ? "%#x" : "%u", bpb->bpbBackup); - } - printf("\n"); -} - -/* - * Check a disk geometry value. - */ -static u_int -ckgeom(const char *fname, u_int val, const char *msg) -{ - if (!val) - errx(1, "%s: no default %s", fname, msg); - if (val > MAXU16) - errx(1, "%s: illegal %s %d", fname, msg, val); - return val; -} - /* * Convert and check a numeric option argument. */ @@ -983,7 +197,7 @@ argtooff(const char *arg, const char *msg) default: errx(1, "%s: bad %s", arg, msg); /* notreached */ - + case 's': /* sector */ case 'S': x <<= 9; /* times 512 */ @@ -1016,46 +230,6 @@ argtooff(const char *arg, const char *msg) } /* - * Check a volume label. - */ -static int -oklabel(const char *src) -{ - int c, i; - - for (i = 0; i <= 11; i++) { - c = (u_char)*src++; - if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) - break; - } - return i && !c; -} - -/* - * Make a volume label. - */ -static void -mklabel(u_int8_t *dest, const char *src) -{ - int c, i; - - for (i = 0; i < 11; i++) { - c = *src ? toupper(*src++) : ' '; - *dest++ = !i && c == '\xe5' ? 5 : c; - } -} - -/* - * Copy string, padding with spaces. - */ -static void -setstr(u_int8_t *dest, const char *src, size_t len) -{ - while (len--) - *dest++ = *src ? *src++ : ' '; -} - -/* * Print usage message. */ static void @@ -1089,10 +263,3 @@ usage(void) "\t-u sectors/track\n"); exit(1); } - -static void -infohandler(int sig __unused) -{ - - got_siginfo = 1; -} |