/* $NetBSD: mkfs_msdos.c,v 1.14.6.1 2019/10/12 15:11:42 bouyer Exp $ */ /* * Copyright (c) 1998 Robert Nordier * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #if HAVE_NBTOOL_CONFIG_H #include "nbtool_config.h" #endif #include #ifndef lint #if 0 static const char rcsid[] = "$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.15 2000/10/10 01:49:37 wollman Exp $"; #else __RCSID("$NetBSD: mkfs_msdos.c,v 1.14.6.1 2019/10/12 15:11:42 bouyer Exp $"); #endif #endif /* not lint */ #include #include #include #include #ifndef MAKEFS #include #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef MAKEFS #include "partutil.h" #endif #include "mkfs_msdos.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 1 /* minimum FAT12 clusters */ #define MINCLS16 0xff5 /* minimum FAT16 clusters */ #define MINCLS32 0xfff5 /* minimum FAT32 clusters */ #define MAXCLS12 0xff4 /* maximum FAT12 clusters */ #define MAXCLS16 0xfff4 /* maximum FAT16 clusters */ #define MAXCLS32 0xffffff4 /* maximum FAT32 clusters */ #define mincls(fat_type) ((fat_type) == 12 ? MINCLS12 : \ (fat_type) == 16 ? MINCLS16 : \ MINCLS32) #define maxcls(fat_type) ((fat_type) == 12 ? MAXCLS12 : \ (fat_type) == 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) struct bs { u_int8_t jmp[3]; /* bootstrap entry point */ u_int8_t oem[8]; /* OEM name and version */ }; struct bsbpb { u_int8_t bps[2]; /* bytes per sector */ u_int8_t spc; /* sectors per cluster */ u_int8_t res[2]; /* reserved sectors */ u_int8_t nft; /* number of FATs */ u_int8_t rde[2]; /* root directory entries */ u_int8_t sec[2]; /* total sectors */ u_int8_t mid; /* media descriptor */ u_int8_t spf[2]; /* sectors per FAT */ u_int8_t spt[2]; /* sectors per track */ u_int8_t hds[2]; /* drive heads */ u_int8_t hid[4]; /* hidden sectors */ u_int8_t bsec[4]; /* big total sectors */ }; struct bsxbpb { u_int8_t bspf[4]; /* big sectors per FAT */ u_int8_t xflg[2]; /* FAT control flags */ u_int8_t vers[2]; /* file system version */ u_int8_t rdcl[4]; /* root directory start cluster */ u_int8_t infs[2]; /* file system info sector */ u_int8_t bkbs[2]; /* backup boot sector */ u_int8_t rsvd[12]; /* reserved */ }; struct bsx { u_int8_t drv; /* drive number */ u_int8_t rsvd; /* reserved */ u_int8_t sig; /* extended boot signature */ u_int8_t volid[4]; /* volume ID number */ u_int8_t label[11]; /* volume label */ u_int8_t type[8]; /* file system type */ }; struct de { u_int8_t namext[11]; /* name and extension */ u_int8_t attr; /* attributes */ u_int8_t rsvd[10]; /* reserved */ u_int8_t time[2]; /* creation time */ u_int8_t date[2]; /* creation date */ u_int8_t clus[2]; /* starting cluster */ u_int8_t size[4]; /* size */ }; struct bpb { u_int bps; /* bytes per sector */ u_int spc; /* sectors per cluster */ u_int res; /* reserved sectors */ u_int nft; /* number of FATs */ u_int rde; /* root directory entries */ u_int sec; /* total sectors */ u_int mid; /* media descriptor */ u_int spf; /* sectors per FAT */ u_int spt; /* sectors per track */ u_int hds; /* drive heads */ u_int hid; /* hidden sectors */ u_int bsec; /* big total sectors */ u_int bspf; /* big sectors per FAT */ u_int rdcl; /* root directory start cluster */ u_int infs; /* file system info sector */ u_int bkbs; /* backup boot sector */ }; #define INIT(a, b, c, d, e, f, g, h, i, j) \ { .bps = a, .spc = b, .res = c, .nft = d, .rde = e, \ .sec = f, .mid = g, .spf = h, .spt = i, .hds = j, } static struct { const char *name; struct bpb bpb; } stdfmt[] = { {"160", INIT(512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1)}, {"180", INIT(512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1)}, {"320", INIT(512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2)}, {"360", INIT(512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2)}, {"640", INIT(512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2)}, {"720", INIT(512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2)}, {"1200", INIT(512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2)}, {"1232", INIT(1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2)}, {"1440", INIT(512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2)}, {"2880", INIT(512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2)} }; static 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 }; static int got_siginfo = 0; /* received a SIGINFO */ #ifndef MAKEFS static int check_mounted(const char *, mode_t); #endif static int getstdfmt(const char *, struct bpb *); static int getbpbinfo(int, const char *, const char *, int, struct bpb *, off_t); static void print_bpb(struct bpb *); static int ckgeom(const char *, u_int, const char *); static int oklabel(const char *); static void mklabel(u_int8_t *, const char *); static void setstr(u_int8_t *, const char *, size_t); static void infohandler(int sig); int mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op) { char buf[MAXPATHLEN]; 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 bss, rds, cls, dir, lsn, x, x1, x2; int ch, fd, fd1; struct msdos_options o = *op; int oflags = O_RDWR | O_CREAT; bool bspf_is_calculated; again: bspf_is_calculated = false; if (o.block_size && o.sectors_per_cluster) { warnx("Cannot specify both block size and sectors per cluster"); return -1; } if (o.OEM_string && strlen(o.OEM_string) > 8) { warnx("%s: bad OEM string", o.OEM_string); return -1; } if (o.create_size) { if (o.no_create) { warnx("create (-C) is incompatible with -N"); return -1; } if (o.offset == 0) oflags |= O_TRUNC; fd = open(fname, oflags, 0644); if (fd == -1) { warnx("failed to create %s", fname); return -1; } (void)lseek(fd, o.create_size - 1, SEEK_SET); if (write(fd, "\0", 1) != 1) { warn("failed to set file size"); return -1; } (void)lseek(fd, 0, SEEK_SET); } else if ((fd = open(fname, o.no_create ? O_RDONLY : O_RDWR)) == -1 || fstat(fd, &sb)) { warn("%s", fname); return -1; } #ifndef MAKEFS if (!o.no_create) if (check_mounted(fname, sb.st_mode) == -1) return -1; #endif if (!S_ISCHR(sb.st_mode) && !o.create_size) { warnx("warning, %s is not a character device", fname); return -1; } if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) { warnx("cannot seek to %jd", (intmax_t)o.offset); return -1; } memset(&bpb, 0, sizeof(bpb)); if (o.floppy) { if (getstdfmt(o.floppy, &bpb) == -1) return -1; bpb.bsec = bpb.sec; bpb.sec = 0; bpb.bspf = bpb.spf; bpb.spf = 0; } if (o.drive_heads) bpb.hds = o.drive_heads; if (o.sectors_per_track) bpb.spt = o.sectors_per_track; if (o.bytes_per_sector) bpb.bps = o.bytes_per_sector; if (o.size) bpb.bsec = o.size; if (o.hidden_sectors_set) bpb.hid = o.hidden_sectors; if (!(o.floppy || (o.drive_heads && o.sectors_per_track && o.bytes_per_sector && o.size && o.hidden_sectors_set))) { if (getbpbinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb, o.create_size) == -1) return -1; bpb.bsec -= (o.offset / bpb.bps); if (bpb.spc == 0) { /* set defaults */ /* minimum cluster size */ switch (o.fat_type) { case 12: bpb.spc = 1; /* use 512 bytes */ x = 2; /* up to 2MB */ break; case 16: bpb.spc = 1; /* use 512 bytes */ x = 32; /* up to 32MB */ break; default: bpb.spc = 8; /* use 4k */ x = 8192; /* up to 8GB */ break; } x1 = howmany(bpb.bsec, (1048576 / 512)); /* -> MB */ while (bpb.spc < 128 && x < x1) { x *= 2; bpb.spc *= 2; } } } if (o.volume_label && !oklabel(o.volume_label)) { warnx("%s: bad volume label", o.volume_label); return -1; } switch (o.fat_type) { case 0: if (o.floppy) o.fat_type = 12; else if (!o.directory_entries && (o.info_sector || o.backup_sector)) o.fat_type = 32; break; case 12: case 16: if (o.info_sector) { warnx("Cannot specify info sector with FAT%u", o.fat_type); return -1; } if (o.backup_sector) { warnx("Cannot specify backup sector with FAT%u", o.fat_type); return -1; } break; case 32: if (o.directory_entries) { warnx("Cannot specify directory entries with FAT32"); return -1; } break; default: warnx("%d: bad FAT type", o.fat_type); return -1; } if (!powerof2(bpb.bps)) { warnx("bytes/sector (%u) is not a power of 2", bpb.bps); return -1; } if (bpb.bps < MINBPS) { warnx("bytes/sector (%u) is too small; minimum is %u", bpb.bps, MINBPS); return -1; } if (o.floppy && o.fat_type == 32) bpb.rde = 0; if (o.block_size) { if (!powerof2(o.block_size)) { warnx("block size (%u) is not a power of 2", o.block_size); return -1; } if (o.block_size < bpb.bps) { warnx("block size (%u) is too small; minimum is %u", o.block_size, bpb.bps); return -1; } if (o.block_size > bpb.bps * MAXSPC) { warnx("block size (%u) is too large; maximum is %u", o.block_size, bpb.bps * MAXSPC); return -1; } bpb.spc = o.block_size / bpb.bps; } if (o.sectors_per_cluster) { if (!powerof2(o.sectors_per_cluster)) { warnx("sectors/cluster (%u) is not a power of 2", o.sectors_per_cluster); return -1; } bpb.spc = o.sectors_per_cluster; } if (o.reserved_sectors) bpb.res = o.reserved_sectors; if (o.num_FAT) { if (o.num_FAT > MAXNFT) { warnx("number of FATs (%u) is too large; maximum is %u", o.num_FAT, MAXNFT); return -1; } bpb.nft = o.num_FAT; } if (o.directory_entries) bpb.rde = o.directory_entries; if (o.media_descriptor_set) { if (o.media_descriptor < 0xf0) { warnx("illegal media descriptor (%#x)", o.media_descriptor); return -1; } bpb.mid = o.media_descriptor; } if (o.sectors_per_fat) bpb.bspf = o.sectors_per_fat; if (o.info_sector) bpb.infs = o.info_sector; if (o.backup_sector) bpb.bkbs = 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))) { warn(NULL); return -1; } } if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) { warn("%s", bname); return -1; } if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) { warnx("%s: inappropriate file type or format", bname); return -1; } bss = sb.st_size / bpb.bps; } if (!bpb.nft) bpb.nft = 2; if (!o.fat_type) { if (bpb.bsec < (bpb.res ? bpb.res : bss) + howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * bpb.nft + howmany(bpb.rde ? bpb.rde : DEFRDE, bpb.bps / sizeof(struct de)) + (bpb.spc ? MINCLS16 : MAXCLS12 + 1) * (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) o.fat_type = 12; else if (bpb.rde || bpb.bsec < (bpb.res ? bpb.res : bss) + howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + howmany(DEFRDE, bpb.bps / sizeof(struct de)) + (MAXCLS16 + 1) * (bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) o.fat_type = 16; else o.fat_type = 32; } x = bss; if (o.fat_type == 32) { if (!bpb.infs) { if (x == MAXU16 || x == bpb.bkbs) { warnx("no room for info sector"); return -1; } bpb.infs = x; } if (bpb.infs != MAXU16 && x <= bpb.infs) x = bpb.infs + 1; if (!bpb.bkbs) { if (x == MAXU16) { warnx("no room for backup sector"); return -1; } bpb.bkbs = x; } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) { warnx("backup sector would overwrite info sector"); return -1; } if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) x = bpb.bkbs + 1; } if (!bpb.res) bpb.res = o.fat_type == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x; else if (bpb.res < x) { warnx("too few reserved sectors (need %d have %d)", x, bpb.res); return -1; } if (o.fat_type != 32 && !bpb.rde) bpb.rde = DEFRDE; rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); if (!bpb.spc) for (bpb.spc = howmany(o.fat_type == 16 ? DEFBLK16 : DEFBLK, bpb.bps); bpb.spc < MAXSPC && bpb.res + howmany((RESFTE + maxcls(o.fat_type)) * (o.fat_type / BPN), bpb.bps * NPB) * bpb.nft + rds + (u_int64_t)(maxcls(o.fat_type) + 1) * bpb.spc <= bpb.bsec; bpb.spc <<= 1); if (o.fat_type != 32 && bpb.bspf > MAXU16) { warnx("too many sectors/FAT for FAT12/16"); return -1; } x1 = bpb.res + rds; x = bpb.bspf ? bpb.bspf : 1; if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) { warnx("meta data exceeds file system size"); return -1; } x1 += x * bpb.nft; x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / (bpb.spc * bpb.bps * NPB + o.fat_type / BPN * bpb.nft); x2 = howmany((RESFTE + MIN(x, maxcls(o.fat_type))) * (o.fat_type / BPN), bpb.bps * NPB); if (!bpb.bspf) { bspf_is_calculated = true; bpb.bspf = x2; x1 += (bpb.bspf - 1) * bpb.nft; } cls = (bpb.bsec - x1) / bpb.spc; x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (o.fat_type / BPN) - RESFTE; if (cls > x) cls = x; if (bpb.bspf < x2) { warnx("warning: sectors/FAT limits file system to %u clusters", cls); return -1; } if (cls < mincls(o.fat_type)) { if (bspf_is_calculated && o.sectors_per_cluster == 0 && bpb.spc > 2) { /* retry with smaller cluster size */ o.sectors_per_cluster = 2; goto again; } warnx("%u clusters too few clusters for FAT%u, need %u", cls, o.fat_type, mincls(o.fat_type)); return -1; } if (cls > maxcls(o.fat_type)) { cls = maxcls(o.fat_type); bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; warnx("warning: FAT type limits file system to %u sectors", bpb.bsec); return -1; } printf("%s: %u sector%s in %u FAT%u cluster%s " "(%u bytes/cluster)\n", fname, cls * bpb.spc, cls * bpb.spc == 1 ? "" : "s", cls, o.fat_type, cls == 1 ? "" : "s", bpb.bps * bpb.spc); if (!bpb.mid) bpb.mid = !bpb.hid ? 0xf0 : 0xf8; if (o.fat_type == 32) bpb.rdcl = RESFTE; if (bpb.hid + bpb.bsec <= MAXU16) { bpb.sec = bpb.bsec; bpb.bsec = 0; } if (o.fat_type != 32) { bpb.spf = bpb.bspf; bpb.bspf = 0; } ch = 0; if (o.fat_type == 12) ch = 1; /* 001 Primary DOS with 12 bit FAT */ else if (o.fat_type == 16) { if (bpb.bsec == 0) ch = 4; /* 004 Primary DOS with 16 bit FAT <32M */ else ch = 6; /* 006 Primary 'big' DOS, 16-bit FAT (> 32MB) */ /* * XXX: what about: * 014 DOS (16-bit FAT) - LBA * ? */ } else if (o.fat_type == 32) { ch = 11; /* 011 Primary DOS with 32 bit FAT */ /* * XXX: what about: * 012 Primary DOS with 32 bit FAT - LBA * ? */ } if (ch != 0) printf("MBR type: %d\n", ch); print_bpb(&bpb); if (!o.no_create) { if (o.timestamp_set) { tv.tv_sec = now = o.timestamp; tv.tv_usec = 0; tm = gmtime(&now); } else { gettimeofday(&tv, NULL); now = tv.tv_sec; tm = localtime(&now); } if (!(img = malloc(bpb.bps))) err(1, NULL); dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; #ifdef SIGINFO signal(SIGINFO, infohandler); #endif for (lsn = 0; lsn < dir + (o.fat_type == 32 ? bpb.spc : rds); lsn++) { if (got_siginfo) { fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n", fname,lsn,(dir + (o.fat_type == 32 ? bpb.spc : rds)), (lsn*100)/(dir + (o.fat_type == 32 ? bpb.spc : rds))); got_siginfo = 0; } x = lsn; if (o.bootstrap && o.fat_type == 32 && bpb.bkbs != MAXU16 && bss <= bpb.bkbs && x >= bpb.bkbs) { x -= bpb.bkbs; if (!x && lseek(fd1, o.offset, SEEK_SET)) { warn("%s", bname); return -1; } } if (o.bootstrap && x < bss) { if ((n = read(fd1, img, bpb.bps)) == -1) { warn("%s", bname); return -1; } if ((size_t)n != bpb.bps) { warnx("%s: can't read sector %u", bname, x); return -1; } } else memset(img, 0, bpb.bps); if (!lsn || (o.fat_type == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { x1 = sizeof(struct bs); bsbpb = (struct bsbpb *)(img + x1); mk2(bsbpb->bps, bpb.bps); mk1(bsbpb->spc, bpb.spc); mk2(bsbpb->res, bpb.res); mk1(bsbpb->nft, bpb.nft); mk2(bsbpb->rde, bpb.rde); mk2(bsbpb->sec, bpb.sec); mk1(bsbpb->mid, bpb.mid); mk2(bsbpb->spf, bpb.spf); mk2(bsbpb->spt, bpb.spt); mk2(bsbpb->hds, bpb.hds); mk4(bsbpb->hid, bpb.hid); mk4(bsbpb->bsec, bpb.bsec); x1 += sizeof(struct bsbpb); if (o.fat_type == 32) { bsxbpb = (struct bsxbpb *)(img + x1); mk4(bsxbpb->bspf, bpb.bspf); mk2(bsxbpb->xflg, 0); mk2(bsxbpb->vers, 0); mk4(bsxbpb->rdcl, bpb.rdcl); mk2(bsxbpb->infs, bpb.infs); mk2(bsxbpb->bkbs, bpb.bkbs); x1 += sizeof(struct bsxbpb); } bsx = (struct bsx *)(img + x1); mk1(bsx->sig, 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->volid, x); mklabel(bsx->label, o.volume_label ? o.volume_label : "NO NAME"); snprintf(buf, sizeof(buf), "FAT%u", o.fat_type); setstr(bsx->type, buf, sizeof(bsx->type)); if (!o.bootstrap) { x1 += sizeof(struct bsx); bs = (struct bs *)img; mk1(bs->jmp[0], 0xeb); mk1(bs->jmp[1], x1 - 2); mk1(bs->jmp[2], 0x90); setstr(bs->oem, o.OEM_string ? o.OEM_string : "NetBSD", sizeof(bs->oem)); memcpy(img + x1, bootcode, sizeof(bootcode)); mk2(img + MINBPS - 2, DOSMAGIC); } } else if (o.fat_type == 32 && bpb.infs != MAXU16 && (lsn == bpb.infs || (bpb.bkbs != MAXU16 && lsn == bpb.bkbs + bpb.infs))) { mk4(img, 0x41615252); mk4(img + MINBPS - 28, 0x61417272); mk4(img + MINBPS - 24, 0xffffffff); mk4(img + MINBPS - 20, 0xffffffff); mk2(img + MINBPS - 2, DOSMAGIC); } else if (lsn >= bpb.res && lsn < dir && !((lsn - bpb.res) % (bpb.spf ? bpb.spf : bpb.bspf))) { mk1(img[0], bpb.mid); for (x = 1; x < o.fat_type * (o.fat_type == 32 ? 3U : 2U) / 8U; x++) mk1(img[x], o.fat_type == 32 && x % 4 == 3 ? 0x0f : 0xff); } else if (lsn == dir && o.volume_label) { de = (struct de *)img; mklabel(de->namext, o.volume_label); mk1(de->attr, 050); x = (u_int)tm->tm_hour << 11 | (u_int)tm->tm_min << 5 | (u_int)tm->tm_sec >> 1; mk2(de->time, x); x = (u_int)(tm->tm_year - 80) << 9 | (u_int)(tm->tm_mon + 1) << 5 | (u_int)tm->tm_mday; mk2(de->date, x); } if ((n = write(fd, img, bpb.bps)) == -1) { warn("%s", fname); return -1; } if ((size_t)n != bpb.bps) { warnx("%s: can't write sector %u", fname, lsn); return -1; } } } return 0; } #ifndef MAKEFS /* * return -1 with error if file system is mounted. */ static int check_mounted(const char *fname, mode_t mode) { struct statvfs *mp; const char *s1, *s2; size_t len; int n, r; if (!(n = getmntinfo(&mp, MNT_NOWAIT))) { warn("getmntinfo"); return -1; } 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)) { warnx("%s is mounted on %s", fname, mp->f_mntonname); return -1; } } return 0; } #endif /* * Get a standard format. */ static int 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) { warnx("%s: unknown standard format", fmt); return -1; } *bpb = stdfmt[i].bpb; return 0; } /* * Get disk slice, partition, and geometry information. */ static int getbpbinfo(int fd, const char *fname, const char *dtype, int iflag, struct bpb *bpb, off_t create_size) { const char *s1, *s2; int part; part = -1; s1 = fname; if ((s2 = strrchr(s1, '/'))) s1 = s2 + 1; for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++); if (!*s2 || s2 == s1) s2 = NULL; else while (isdigit((unsigned char)*++s2)); s1 = s2; #ifndef MAKEFS int maxpartitions = getmaxpartitions(); struct disk_geom geo; struct dkwedge_info dkw; // XXX: Does not work with wedges if (s2 && *s2 >= 'a' && *s2 <= 'a' + maxpartitions - 1) { part = *s2++ - 'a'; } #endif if (!(((part != -1) && ((!iflag && part != -1) || !bpb->bsec)) || !bpb->bps || !bpb->spt || !bpb->hds)) { return 0; } u_int sector_size = 512; u_int nsectors = 63; u_int ntracks = 255; u_int size; if (create_size == 0) { #ifndef MAKEFS if (getdiskinfo(fname, fd, NULL, &geo, &dkw) != -1) { sector_size = geo.dg_secsize; nsectors = geo.dg_nsectors; ntracks = geo.dg_ntracks; size = dkw.dkw_size; } else #endif { struct stat st; if (fstat(fd, &st) == -1) { warnx("Can't get disk size for `%s'", fname); return -1; } size = st.st_size / sector_size; } } else { size = create_size / sector_size; } if (!bpb->bps) { if (ckgeom(fname, sector_size, "bytes/sector") == -1) return -1; bpb->bps = sector_size; } if (nsectors > 63) { /* * The kernel doesn't accept BPB with spt > 63. * (see sys/fs/msdosfs/msdosfs_vfsops.c:msdosfs_mountfs()) * If values taken from disklabel don't match these * restrictions, use popular BIOS default values instead. */ nsectors = 63; } if (!bpb->spt) { if (ckgeom(fname, nsectors, "sectors/track") == -1) return -1; bpb->spt = nsectors; } if (!bpb->hds) { if (ckgeom(fname, ntracks, "drive heads") == -1) return -1; bpb->hds = ntracks; } if (!bpb->bsec) bpb->bsec = size; return 0; } /* * Print out BPB values. */ static void print_bpb(struct bpb *bpb) { printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, bpb->nft); if (bpb->rde) printf(" rde=%u", bpb->rde); if (bpb->sec) printf(" sec=%u", bpb->sec); printf(" mid=%#x", bpb->mid); if (bpb->spf) printf(" spf=%u", bpb->spf); printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); if (bpb->bsec) printf(" bsec=%u", bpb->bsec); if (!bpb->spf) { printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); printf(" infs="); printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); printf(" bkbs="); printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); } printf("\n"); } /* * Check a disk geometry value. */ static int ckgeom(const char *fname, u_int val, const char *msg) { if (!val) { warnx("%s: no default %s", fname, msg); return -1; } if (val > MAXU16) { warnx("%s: illegal %s", fname, msg); return -1; } return 0; } /* * 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((unsigned char)*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++ : ' '; } static void infohandler(int sig) { got_siginfo = 1; }