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libfdisk: (dos) support partition and MBR overlap 

Let's support this crazy use-case in expert menu, because it's normal
for removable FAT disks, etc.

Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
Karel Zak 2021-07-27 11:40:32 +02:00
parent 6e8af4695e
commit 9d761e8325
1 changed files with 9 additions and 3 deletions
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12
libfdisk/src/dos.c
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@ -2494,10 +2494,11 @@ int fdisk_dos_move_begin(struct fdisk_context *cxt, size_t i)
return 0;
}
/* the default start is at the second sector of the disk or at the
* second sector of the extended partition
/* The safe start is at the second sector, but some use-cases require
* to have MBR within the first partition , so default to the first
* sector of the disk or at the second sector of the extended partition
*/
free_start = pe->offset ? pe->offset + 1 : 1;
free_start = pe->offset ? pe->offset + 1 : 0;
curr_start = get_abs_partition_start(pe);
@ -2537,6 +2538,11 @@ int fdisk_dos_move_begin(struct fdisk_context *cxt, size_t i)
dos_partition_set_start(p, new);
partition_set_changed(cxt, i, 1);
if (new == 0)
fdisk_info(cxt, _("The new beginning of the partition overlaps the disk "
"label area. Be very careful when using the partition. "
"You can lose all your partitions on the disk."));
}
return rc;