diff options
Diffstat (limited to 'sbin/newfs_msdos/mkfs_msdos.c')
| -rw-r--r-- | sbin/newfs_msdos/mkfs_msdos.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/sbin/newfs_msdos/mkfs_msdos.c b/sbin/newfs_msdos/mkfs_msdos.c index 13a804c82625..dcc2bb982efc 100644 --- a/sbin/newfs_msdos/mkfs_msdos.c +++ b/sbin/newfs_msdos/mkfs_msdos.c @@ -25,11 +25,6 @@ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef lint -static const char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ - #include <sys/param.h> #ifdef MAKEFS /* In the makefs case we only want struct disklabel */ @@ -254,7 +249,7 @@ mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op) ssize_t n; time_t now; u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; - u_int extra_res, alignment, saved_x, attempts=0; + u_int extra_res, alignment, alignto, saved_x, attempts=0; bool set_res, set_spf, set_spc; int fd, fd1, rv; struct msdos_options o = *op; @@ -417,8 +412,12 @@ mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op) } bpb.bpbFATs = o.num_FAT; } - if (o.directory_entries) - bpb.bpbRootDirEnts = o.directory_entries; + if (o.directory_entries) { + bpb.bpbRootDirEnts = roundup(o.directory_entries, + bpb.bpbBytesPerSec / sizeof(struct de)); + if (bpb.bpbBytesPerSec == 0 || o.directory_entries >= MAXU16) + bpb.bpbRootDirEnts = MAXU16; + } if (o.media_descriptor_set) { if (o.media_descriptor < 0xf0) { warnx("illegal media descriptor (%#x)", o.media_descriptor); @@ -569,14 +568,17 @@ mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op) x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs; } if (set_res) { - /* attempt to align root directory */ - alignment = (bpb.bpbResSectors + bpb.bpbBigFATsecs * bpb.bpbFATs) % - bpb.bpbSecPerClust; - if (o.align) - extra_res += bpb.bpbSecPerClust - alignment; + alignto = bpb.bpbSecPerClust; + if (alignto > 1) { + /* align data clusters */ + alignment = (bpb.bpbResSectors + bpb.bpbBigFATsecs * bpb.bpbFATs + rds) % + alignto; + if (alignment != 0) + extra_res += alignto - alignment; + } } attempts++; - } while (o.align && alignment != 0 && attempts < 2); + } while (alignment != 0 && attempts < 2); if (o.align && alignment != 0) warnx("warning: Alignment failed."); |