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Try to pick up disk geometry with specific DIOC* ioctls, rather than

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expecting a bogo-disklabel to contain them, if possible.

This makes fdisk work with GEOM.
This commit is contained in:
Poul-Henning Kamp 2002-09-15 16:08:52 +00:00
parent 8662984e5e
commit 3f8ba8b5f8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103348
1 changed files with 21 additions and 1 deletions
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22
sbin/fdisk/fdisk.c
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@ -29,6 +29,7 @@ static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/param.h>
#include <sys/stat.h>
@ -748,6 +749,9 @@ write_disk(off_t sector, void *buf)
static int
get_params()
{
int error;
u_int u;
off_t o;
if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
warnx("can't get disk parameters on %s; supplying dummy ones", disk);
@ -756,7 +760,23 @@ get_params()
dos_sectors = sectors = 1;
dos_cylsecs = cylsecs = heads * sectors;
disksecs = cyls * heads * sectors;
return disksecs;
}
error = ioctl(fd, DIOCGFWSECTORS, &u);
if (error == 0)
dos_sectors = u;
error = ioctl(fd, DIOCGFWHEADS, &u);
if (error == 0)
dos_heads = u;
error = ioctl(fd, DIOCGSECTORSIZE, &u);
if (error != 0) {
u = 512;
}
error = ioctl(fd, DIOCGMEDIASIZE, &o);
if (error == 0) {
dos_cylsecs = dos_heads * dos_sectors;
disksecs = o / u;
dos_cyls = o / (u * dos_heads * dos_sectors);
return (o / u);
}
dos_cyls = cyls = disklabel.d_ncylinders;