示例#1
0
int check_dos_label(struct fdisk_context *cxt)
{
	int i;

	if (!valid_part_table_flag(cxt->mbr))
		return 0;

	dos_init(cxt);

	for (i = 0; i < 4; i++) {
		struct pte *pe = &ptes[i];

		if (IS_EXTENDED (pe->part_table->sys_ind)) {
			if (partitions != 4)
				fprintf(stderr, _("Ignoring extra extended "
					"partition %d\n"), i + 1);
			else
				read_extended(cxt, i);
		}
	}

	for (i = 3; i < partitions; i++) {
		struct pte *pe = &ptes[i];

		if (!valid_part_table_flag(pe->sectorbuffer)) {
			fprintf(stderr,
				_("Warning: invalid flag 0x%04x of partition "
				"table %d will be corrected by w(rite)\n"),
				part_table_flag(pe->sectorbuffer), i + 1);
			pe->changed = 1;
		}
	}

	return 1;
}
示例#2
0
void dos_delete_partition(int i)
{
	struct pte *pe = &ptes[i];
	struct partition *p = pe->part_table;
	struct partition *q = pe->ext_pointer;

	/* Note that for the fifth partition (i == 4) we don't actually
	   decrement partitions. */

	if (i < 4) {
		if (IS_EXTENDED (p->sys_ind) && i == ext_index) {
			partitions = 4;
			ptes[ext_index].ext_pointer = NULL;
			extended_offset = 0;
		}
		clear_partition(p);
	} else if (!q->sys_ind && i > 4) {
		/* the last one in the chain - just delete */
		--partitions;
		--i;
		clear_partition(ptes[i].ext_pointer);
		ptes[i].changed = 1;
	} else {
		/* not the last one - further ones will be moved down */
		if (i > 4) {
			/* delete this link in the chain */
			p = ptes[i-1].ext_pointer;
			*p = *q;
			set_start_sect(p, get_start_sect(q));
			set_nr_sects(p, get_nr_sects(q));
			ptes[i-1].changed = 1;
		} else if (partitions > 5) {    /* 5 will be moved to 4 */
			/* the first logical in a longer chain */
			struct pte *pe = &ptes[5];

			if (pe->part_table) /* prevent SEGFAULT */
				set_start_sect(pe->part_table,
					       get_partition_start(pe) -
					       extended_offset);
			pe->offset = extended_offset;
			pe->changed = 1;
		}

		if (partitions > 5) {
			partitions--;
			while (i < partitions) {
				ptes[i] = ptes[i+1];
				i++;
			}
		} else
			/* the only logical: clear only */
			clear_partition(ptes[i].part_table);
	}
}
示例#3
0
void dos_add_partition(struct fdisk_context *cxt, int n, int sys)
{
	char mesg[256];		/* 48 does not suffice in Japanese */
	int i, read = 0;
	struct partition *p = ptes[n].part_table;
	struct partition *q = ptes[ext_index].part_table;
	sector_t start, stop = 0, limit, temp,
		first[partitions], last[partitions];

	if (p && p->sys_ind) {
		printf(_("Partition %d is already defined.  Delete "
			 "it before re-adding it.\n"), n + 1);
		return;
	}
	fill_bounds(first, last);
	if (n < 4) {
		start = sector_offset;
		if (display_in_cyl_units || !cxt->total_sectors)
			limit = cxt->geom.heads * cxt->geom.sectors * cxt->geom.cylinders - 1;
		else
			limit = cxt->total_sectors - 1;

		if (limit > UINT_MAX)
			limit = UINT_MAX;

		if (extended_offset) {
			first[ext_index] = extended_offset;
			last[ext_index] = get_start_sect(q) +
				get_nr_sects(q) - 1;
		}
	} else {
		start = extended_offset + sector_offset;
		limit = get_start_sect(q) + get_nr_sects(q) - 1;
	}
	if (display_in_cyl_units)
		for (i = 0; i < partitions; i++)
			first[i] = (cround(first[i]) - 1) * units_per_sector;

	snprintf(mesg, sizeof(mesg), _("First %s"), str_units(SINGULAR));
	do {
		sector_t dflt, aligned;

		temp = start;
		dflt = start = get_unused_start(n, start, first, last);

		/* the default sector should be aligned and unused */
		do {
			aligned = align_lba_in_range(cxt, dflt, dflt, limit);
			dflt = get_unused_start(n, aligned, first, last);
		} while (dflt != aligned && dflt > aligned && dflt < limit);

		if (dflt >= limit)
			dflt = start;
		if (start > limit)
			break;
		if (start >= temp+units_per_sector && read) {
			printf(_("Sector %llu is already allocated\n"), temp);
			temp = start;
			read = 0;
		}
		if (!read && start == temp) {
			sector_t i = start;

			start = read_int(cxt, cround(i), cround(dflt), cround(limit),
					 0, mesg);
			if (display_in_cyl_units) {
				start = (start - 1) * units_per_sector;
				if (start < i) start = i;
			}
			read = 1;
		}
	} while (start != temp || !read);
	if (n > 4) {			/* NOT for fifth partition */
		struct pte *pe = &ptes[n];

		pe->offset = start - sector_offset;
		if (pe->offset == extended_offset) { /* must be corrected */
			pe->offset++;
			if (sector_offset == 1)
				start++;
		}
	}

	for (i = 0; i < partitions; i++) {
		struct pte *pe = &ptes[i];

		if (start < pe->offset && limit >= pe->offset)
			limit = pe->offset - 1;
		if (start < first[i] && limit >= first[i])
			limit = first[i] - 1;
	}
	if (start > limit) {
		printf(_("No free sectors available\n"));
		if (n > 4)
			partitions--;
		return;
	}
	if (cround(start) == cround(limit)) {
		stop = limit;
	} else {
		int is_suffix_used = 0;

		snprintf(mesg, sizeof(mesg),
			_("Last %1$s, +%2$s or +size{K,M,G}"),
			 str_units(SINGULAR), str_units(PLURAL));

		stop = read_int_with_suffix(cxt,
					    cround(start), cround(limit), cround(limit),
					    cround(start), mesg, &is_suffix_used);
		if (display_in_cyl_units) {
			stop = stop * units_per_sector - 1;
			if (stop >limit)
				stop = limit;
		}

		if (is_suffix_used && alignment_required) {
			/* the last sector has not been exactly requested (but
			 * defined by +size{K,M,G} convention), so be smart
			 * and align the end of the partition. The next
			 * partition will start at phy.block boundary.
			 */
			stop = align_lba_in_range(cxt, stop, start, limit) - 1;
			if (stop > limit)
				stop = limit;
		}
	}

	set_partition(cxt, n, 0, start, stop, sys);
	if (n > 4)
		set_partition(cxt, n - 1, 1, ptes[n].offset, stop, EXTENDED);

	if (IS_EXTENDED (sys)) {
		struct pte *pe4 = &ptes[4];
		struct pte *pen = &ptes[n];

		ext_index = n;
		pen->ext_pointer = p;
		pe4->offset = extended_offset = start;
		pe4->sectorbuffer = xcalloc(1, cxt->sector_size);
		pe4->part_table = pt_offset(pe4->sectorbuffer, 0);
		pe4->ext_pointer = pe4->part_table + 1;
		pe4->changed = 1;
		partitions = 5;
	}
}
示例#4
0
static void read_extended(struct fdisk_context *cxt, int ext)
{
	int i;
	struct pte *pex;
	struct partition *p, *q;

	ext_index = ext;
	pex = &ptes[ext];
	pex->ext_pointer = pex->part_table;

	p = pex->part_table;
	if (!get_start_sect(p)) {
		fprintf(stderr,
			_("Bad offset in primary extended partition\n"));
		return;
	}

	while (IS_EXTENDED (p->sys_ind)) {
		struct pte *pe = &ptes[partitions];

		if (partitions >= MAXIMUM_PARTS) {
			/* This is not a Linux restriction, but
			   this program uses arrays of size MAXIMUM_PARTS.
			   Do not try to `improve' this test. */
			struct pte *pre = &ptes[partitions-1];

			fprintf(stderr,
				_("Warning: omitting partitions after #%d.\n"
				  "They will be deleted "
				  "if you save this partition table.\n"),
				partitions);
			clear_partition(pre->ext_pointer);
			pre->changed = 1;
			return;
		}

		read_pte(cxt, partitions, extended_offset + get_start_sect(p));

		if (!extended_offset)
			extended_offset = get_start_sect(p);

		q = p = pt_offset(pe->sectorbuffer, 0);
		for (i = 0; i < 4; i++, p++) if (get_nr_sects(p)) {
			if (IS_EXTENDED (p->sys_ind)) {
				if (pe->ext_pointer)
					fprintf(stderr,
						_("Warning: extra link "
						  "pointer in partition table"
						  " %d\n"), partitions + 1);
				else
					pe->ext_pointer = p;
			} else if (p->sys_ind) {
				if (pe->part_table)
					fprintf(stderr,
						_("Warning: ignoring extra "
						  "data in partition table"
						  " %d\n"), partitions + 1);
				else
					pe->part_table = p;
			}
		}

		/* very strange code here... */
		if (!pe->part_table) {
			if (q != pe->ext_pointer)
				pe->part_table = q;
			else
				pe->part_table = q + 1;
		}
		if (!pe->ext_pointer) {
			if (q != pe->part_table)
				pe->ext_pointer = q;
			else
				pe->ext_pointer = q + 1;
		}

		p = pe->ext_pointer;
		partitions++;
	}

	/* remove empty links */
 remove:
	for (i = 4; i < partitions; i++) {
		struct pte *pe = &ptes[i];

		if (!get_nr_sects(pe->part_table) &&
		    (partitions > 5 || ptes[4].part_table->sys_ind)) {
			printf(_("omitting empty partition (%d)\n"), i+1);
			dos_delete_partition(i);
			goto remove; 	/* numbering changed */
		}
	}
}
示例#5
0
static u_int
ieee802_11_radio_print(const u_char *p, u_int length, u_int caplen)
{
#define	BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x)))
#define	BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x)))
#define	BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x)))
#define	BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x)))
#define	BITNO_2(x) (((x) & 2) ? 1 : 0)
#define	BIT(n)	(1 << n)
#define	IS_EXTENDED(__p)	\
	    (EXTRACT_LE_32BITS(__p) & BIT(IEEE80211_RADIOTAP_EXT)) != 0

	struct cpack_state cpacker;
	struct ieee80211_radiotap_header *hdr;
	u_int32_t present, next_present;
	u_int32_t *presentp, *last_presentp;
	enum ieee80211_radiotap_type bit;
	int bit0;
	const u_char *iter;
	u_int len;
	int pad;

	if (caplen < sizeof(*hdr)) {
		printf("[|802.11]");
		return caplen;
	}

	hdr = (struct ieee80211_radiotap_header *)p;

	len = EXTRACT_LE_16BITS(&hdr->it_len);

	if (caplen < len) {
		printf("[|802.11]");
		return caplen;
	}
	for (last_presentp = &hdr->it_present;
	     IS_EXTENDED(last_presentp) &&
	     (u_char*)(last_presentp + 1) <= p + len;
	     last_presentp++);

	/* are there more bitmap extensions than bytes in header? */
	if (IS_EXTENDED(last_presentp)) {
		printf("[|802.11]");
		return caplen;
	}

	iter = (u_char*)(last_presentp + 1);

	if (cpack_init(&cpacker, (u_int8_t*)iter, len - (iter - p)) != 0) {
		/* XXX */
		printf("[|802.11]");
		return caplen;
	}

	/* Assume no Atheros padding between 802.11 header and body */
	pad = 0;
	for (bit0 = 0, presentp = &hdr->it_present; presentp <= last_presentp;
	     presentp++, bit0 += 32) {
		for (present = EXTRACT_LE_32BITS(presentp); present;
		     present = next_present) {
			/* clear the least significant bit that is set */
			next_present = present & (present - 1);

			/* extract the least significant bit that is set */
			bit = (enum ieee80211_radiotap_type)
			    (bit0 + BITNO_32(present ^ next_present));

			if (print_radiotap_field(&cpacker, bit, &pad) != 0)
				goto out;
		}
	}
out:
	return len + ieee802_11_print(p + len, length - len, caplen - len, pad);
#undef BITNO_32
#undef BITNO_16
#undef BITNO_8
#undef BITNO_4
#undef BITNO_2
#undef BIT
}