" disabled."
};
+\f
+/* partnew PART TYPE START LEN */
+static int
+partnew_func (char *arg, int flags)
+{
+ int new_type, new_start, new_len;
+ int start_cl, start_ch, start_dh;
+ int end_cl, end_ch, end_dh;
+ int entry;
+ char *mbr = (char *) SCRATCHADDR;
+
+ /* Convert a LBA address to a CHS address in the INT 13 format. */
+ auto void lba_to_chs (int lba, int *cl, int *ch, int *dh);
+ void lba_to_chs (int lba, int *cl, int *ch, int *dh)
+ {
+ int cylinder, head, sector;
+
+ sector = lba % buf_geom.sectors + 1;
+ head = (lba / buf_geom.sectors) % buf_geom.heads;
+ cylinder = lba / (buf_geom.sectors * buf_geom.heads);
+
+ if (cylinder >= buf_geom.cylinders)
+ cylinder = buf_geom.cylinders - 1;
+
+ *cl = sector | ((cylinder & 0x300) >> 2);
+ *ch = cylinder & 0xFF;
+ *dh = head;
+ }
+
+ /* Get the drive and the partition. */
+ if (! set_device (arg))
+ return 1;
+
+ /* The drive must be a hard disk. */
+ if (! (current_drive & 0x80))
+ {
+ errnum = ERR_BAD_ARGUMENT;
+ return 1;
+ }
+
+ /* The partition must a primary partition. */
+ if ((current_partition >> 16) > 3
+ || (current_partition & 0xFFFF) != 0xFFFF)
+ {
+ errnum = ERR_BAD_ARGUMENT;
+ return 1;
+ }
+
+ entry = current_partition >> 16;
+
+ /* Get the new partition type. */
+ arg = skip_to (0, arg);
+ if (! safe_parse_maxint (&arg, &new_type))
+ return 1;
+
+ /* The partition type is unsigned char. */
+ if (new_type > 0xFF)
+ {
+ errnum = ERR_BAD_ARGUMENT;
+ return 1;
+ }
+
+ /* Get the new partition start. */
+ arg = skip_to (0, arg);
+ if (! safe_parse_maxint (&arg, &new_start))
+ return 1;
+
+ /* Get the new partition length. */
+ arg = skip_to (0, arg);
+ if (! safe_parse_maxint (&arg, &new_len))
+ return 1;
+
+ /* Read the MBR. */
+ if (! rawread (current_drive, 0, 0, SECTOR_SIZE, mbr))
+ return 1;
+
+ /* Check if the new partition will fit in the disk. */
+ if (new_start + new_len > buf_geom.total_sectors)
+ {
+ errnum = ERR_GEOM;
+ return 1;
+ }
+
+ /* Store the partition information in the MBR. */
+ lba_to_chs (new_start, &start_cl, &start_ch, &start_dh);
+ lba_to_chs (new_start + new_len - 1, &end_cl, &end_ch, &end_dh);
+
+ PC_SLICE_FLAG (mbr, entry) = 0;
+ PC_SLICE_HEAD (mbr, entry) = start_dh;
+ PC_SLICE_SEC (mbr, entry) = start_cl;
+ PC_SLICE_CYL (mbr, entry) = start_ch;
+ PC_SLICE_TYPE (mbr, entry) = new_type;
+ PC_SLICE_EHEAD (mbr, entry) = end_dh;
+ PC_SLICE_ESEC (mbr, entry) = end_cl;
+ PC_SLICE_ECYL (mbr, entry) = end_ch;
+ PC_SLICE_START (mbr, entry) = new_start;
+ PC_SLICE_LENGTH (mbr, entry) = new_len;
+
+ /* Make sure that the MBR has a valid signature. */
+ PC_MBR_SIG (mbr) = PC_MBR_SIGNATURE;
+
+ /* Write back the MBR to the disk. */
+ buf_track = -1;
+ if (biosdisk (BIOSDISK_WRITE, current_drive, &buf_geom, 0, 1, SCRATCHSEG))
+ {
+ errnum = ERR_WRITE;
+ return 1;
+ }
+
+ return 0;
+}
+
+static struct builtin builtin_partnew =
+{
+ "partnew",
+ partnew_func,
+ BUILTIN_CMDLINE | BUILTIN_MENU,
+ "partnew PART TYPE START LEN",
+ "Create a primary partition at the starting address START with the"
+ " length LEN, with the type TYPE. START and LEN are in sector units."
+};
+
+\f
+/* parttype PART TYPE */
+static int
+parttype_func (char *arg, int flags)
+{
+ int new_type;
+ unsigned long part = 0xFFFFFF;
+ unsigned long start, len, offset, ext_offset;
+ int entry, type;
+ char *mbr = (char *) SCRATCHADDR;
+
+ /* Get the drive and the partition. */
+ if (! set_device (arg))
+ return 1;
+
+ /* The drive must be a hard disk. */
+ if (! (current_drive & 0x80))
+ {
+ errnum = ERR_BAD_ARGUMENT;
+ return 1;
+ }
+
+ /* The partition must be a PC slice. */
+ if ((current_partition >> 16) == 0xFF
+ || (current_partition & 0xFFFF) != 0xFFFF)
+ {
+ errnum = ERR_BAD_ARGUMENT;
+ return 1;
+ }
+
+ /* Get the new partition type. */
+ arg = skip_to (0, arg);
+ if (! safe_parse_maxint (&arg, &new_type))
+ return 1;
+
+ /* The partition type is unsigned char. */
+ if (new_type > 0xFF)
+ {
+ errnum = ERR_BAD_ARGUMENT;
+ return 1;
+ }
+
+ /* Look for the partition. */
+ while (next_partition (current_drive, 0xFFFFFF, &part, &type,
+ &start, &len, &offset, &entry,
+ &ext_offset, mbr))
+ {
+ if (part == current_partition)
+ {
+ /* Found. */
+
+ /* Set the type to NEW_TYPE. */
+ PC_SLICE_TYPE (mbr, entry) = new_type;
+
+ /* Write back the MBR to the disk. */
+ buf_track = -1;
+ if (biosdisk (BIOSDISK_WRITE, current_drive, &buf_geom,
+ offset, 1, SCRATCHSEG))
+ {
+ errnum = ERR_WRITE;
+ return 1;
+ }
+
+ /* Succeed. */
+ return 0;
+ }
+ }
+
+ /* The partition was not found. ERRNUM was set by next_partition. */
+ return 1;
+}
+
+static struct builtin builtin_parttype =
+{
+ "parttype",
+ parttype_func,
+ BUILTIN_CMDLINE | BUILTIN_MENU,
+ "parttype PART TYPE",
+ "Change the type of the partition PART to TYPE."
+};
+
\f
/* password */
static int
&builtin_map,
&builtin_module,
&builtin_modulenounzip,
+ &builtin_partnew,
+ &builtin_parttype,
&builtin_password,
&builtin_pause,
#ifdef GRUB_UTIL
projects / thirdparty / grub.git / commitdiff
