+++ /dev/null
-/*
- * Based on libdisk from xfsprogs and Linux fdisk.
- *
- * Copyright (c) 2000-2001 Silicon Graphics, Inc.
- * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
- */
-#include <stdio.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <stdlib.h>
-
-#include "blkdev.h"
-
-/* we need to read two sectors, beacuse BSD label offset is 512 */
-#define PTTYPE_BUFSIZ (2 * DEFAULT_SECTOR_SIZE) /* 1024 */
-
-/*
- * SGI
- */
-struct sgi_device_parameter { /* 48 bytes */
- unsigned char skew;
- unsigned char gap1;
- unsigned char gap2;
- unsigned char sparecyl;
- unsigned short pcylcount;
- unsigned short head_vol0;
- unsigned short ntrks; /* tracks in cyl 0 or vol 0 */
- unsigned char cmd_tag_queue_depth;
- unsigned char unused0;
- unsigned short unused1;
- unsigned short nsect; /* sectors/tracks in cyl 0 or vol 0 */
- unsigned short bytes;
- unsigned short ilfact;
- unsigned int flags; /* controller flags */
- unsigned int datarate;
- unsigned int retries_on_error;
- unsigned int ms_per_word;
- unsigned short xylogics_gap1;
- unsigned short xylogics_syncdelay;
- unsigned short xylogics_readdelay;
- unsigned short xylogics_gap2;
- unsigned short xylogics_readgate;
- unsigned short xylogics_writecont;
-};
-
-#define SGI_VOLHDR 0x00
-/* 1 and 2 were used for drive types no longer supported by SGI */
-#define SGI_SWAP 0x03
-/* 4 and 5 were for filesystem types SGI haven't ever supported on MIPS CPUs */
-#define SGI_VOLUME 0x06
-#define SGI_EFS 0x07
-#define SGI_LVOL 0x08
-#define SGI_RLVOL 0x09
-#define SGI_XFS 0x0a
-#define SGI_XFSLOG 0x0b
-#define SGI_XLV 0x0c
-#define SGI_XVM 0x0d
-#define ENTIRE_DISK SGI_VOLUME
-/*
- * controller flags
- */
-#define SECTOR_SLIP 0x01
-#define SECTOR_FWD 0x02
-#define TRACK_FWD 0x04
-#define TRACK_MULTIVOL 0x08
-#define IGNORE_ERRORS 0x10
-#define RESEEK 0x20
-#define CMDTAGQ_ENABLE 0x40
-
-struct sgi_volume_header {
- unsigned int magic; /* expect SGI_LABEL_MAGIC */
- unsigned short boot_part; /* active boot partition */
- unsigned short swap_part; /* active swap partition */
- unsigned char boot_file[16]; /* name of the bootfile */
- struct sgi_device_parameter devparam; /* 1 * 48 bytes */
- struct volume_directory { /* 15 * 16 bytes */
- unsigned char vol_file_name[8]; /* a character array */
- unsigned int vol_file_start; /* number of logical block */
- unsigned int vol_file_size; /* number of bytes */
- } directory[15];
- struct sgi_partition { /* 16 * 12 bytes */
- unsigned int num_sectors; /* number of blocks */
- unsigned int start_sector; /* must be cylinder aligned */
- unsigned int id;
- } partitions[16];
- unsigned int csum;
- unsigned int fillbytes;
-};
-
-#define SGI_LABEL_MAGIC 0x0be5a941
-
-static uint32_t
-twos_complement_32bit_sum(u_int32_t *base, int size)
-{
- int i;
- u_int32_t sum = 0;
-
- size = size / sizeof(u_int32_t);
- for (i = 0; i < size; i++)
- sum = sum - ntohl(base[i]);
- return sum;
-}
-
-static int
-sgi_parttable(unsigned char *base)
-{
- u_int32_t csum;
- struct sgi_volume_header *vh = (struct sgi_volume_header *) base;
-
- if (ntohl(vh->magic) != SGI_LABEL_MAGIC)
- return 0;
- csum = twos_complement_32bit_sum((uint32_t *)vh,
- sizeof(struct sgi_volume_header));
- return !csum;
-}
-
-/*
- * DOS
- */
-static int
-dos_parttable(unsigned char *base)
-{
- return (base[510] == 0x55 && base[511] == 0xaa);
-}
-
-/*
- * AIX
- */
-typedef struct {
- unsigned int magic; /* expect AIX_LABEL_MAGIC */
- /* ... */
-} aix_partition;
-
-#define AIX_LABEL_MAGIC 0xc9c2d4c1
-#define AIX_LABEL_MAGIC_SWAPPED 0xc1d4c2c9
-#define aixlabel(x) ((aix_partition *)x)
-
-static int
-aix_parttable(unsigned char *base)
-{
- return (aixlabel(base)->magic == AIX_LABEL_MAGIC ||
- aixlabel(base)->magic == AIX_LABEL_MAGIC_SWAPPED);
-}
-
-/*
- * SUN
- */
-typedef struct {
- unsigned char info[128]; /* Informative text string */
- unsigned char spare0[14];
- struct sun_info {
- unsigned char spare1;
- unsigned char id;
- unsigned char spare2;
- unsigned char flags;
- } infos[8];
- unsigned char spare1[246]; /* Boot information etc. */
- unsigned short rspeed; /* Disk rotational speed */
- unsigned short pcylcount; /* Physical cylinder count */
- unsigned short sparecyl; /* extra sects per cylinder */
- unsigned char spare2[4]; /* More magic... */
- unsigned short ilfact; /* Interleave factor */
- unsigned short ncyl; /* Data cylinder count */
- unsigned short nacyl; /* Alt. cylinder count */
- unsigned short ntrks; /* Tracks per cylinder */
- unsigned short nsect; /* Sectors per track */
- unsigned char spare3[4]; /* Even more magic... */
- struct sun_partition {
- u_int32_t start_cylinder;
- u_int32_t num_sectors;
- } partitions[8];
- unsigned short magic; /* Magic number */
- unsigned short csum; /* Label xor'd checksum */
-} sun_partition;
-
-#define SUN_LABEL_MAGIC 0xDABE
-#define SUN_LABEL_MAGIC_SWAPPED 0xBEDA
-#define sunlabel(x) ((sun_partition *)x)
-
-static int
-sun_parttable(unsigned char *base)
-{
- unsigned short *ush;
- int csum = 0;
-
- if (sunlabel(base)->magic != SUN_LABEL_MAGIC &&
- sunlabel(base)->magic != SUN_LABEL_MAGIC_SWAPPED)
- return csum;
- ush = ((unsigned short *) (sunlabel(base) + 1)) - 1;
- while (ush >= (unsigned short *)sunlabel(base))
- csum ^= *ush--;
- return !csum;
-}
-
-/*
- * MAC
- */
-typedef struct {
- unsigned short magic;
- /* ... */
-} mac_partition;
-
-#define MAC_LABEL_MAGIC 0x4552
-#define MAC_PARTITION_MAGIC 0x504d
-#define MAC_OLD_PARTITION_MAGIC 0x5453
-#define maclabel(x) ((mac_partition *)x)
-
-static int
-mac_parttable(unsigned char *base)
-{
- return (ntohs(maclabel(base)->magic) == MAC_LABEL_MAGIC ||
- ntohs(maclabel(base)->magic) == MAC_PARTITION_MAGIC ||
- ntohs(maclabel(base)->magic) == MAC_OLD_PARTITION_MAGIC);
-}
-
-/*
- * BSD subpartitions listed in a disklabel, under a dos-like partition.
- */
-#define BSD_DISKMAGIC 0x82564557UL /* The disk magic number */
-#define BSD_DISKMAGIC_SWAPED 0x57455682UL
-struct bsd_disklabel {
- uint32_t magic; /* the magic number */
- /* ... */
-};
-
-static int
-bsd_parttable(unsigned char *base)
-{
- struct bsd_disklabel *l = (struct bsd_disklabel *)
- (base + (DEFAULT_SECTOR_SIZE * 1));
-
- return (l->magic == BSD_DISKMAGIC || l->magic == BSD_DISKMAGIC_SWAPED);
-}
-
-const char *
-get_pt_type_fd(int fd)
-{
- char *type = NULL;
- unsigned char buf[PTTYPE_BUFSIZ];
-
- if (read(fd, buf, PTTYPE_BUFSIZ) != PTTYPE_BUFSIZ)
- ;
- else {
- if (sgi_parttable(buf))
- type = "SGI";
- else if (sun_parttable(buf))
- type = "Sun";
- else if (aix_parttable(buf))
- type = "AIX";
- else if (dos_parttable(buf))
- type = "DOS";
- else if (mac_parttable(buf))
- type = "Mac";
- else if (bsd_parttable(buf))
- type = "BSD";
- }
- return type;
-}
-
-const char *
-get_pt_type(const char *device)
-{
- int fd;
- const char *type;
-
- fd = open(device, O_RDONLY);
- if (fd == -1)
- return NULL;
- type = get_pt_type_fd(fd);
- close(fd);
- return type;
-}
-
-#ifdef TEST_PROGRAM
-int
-main(int argc, char **argv)
-{
- const char *type;
-
- if (argc < 2) {
- fprintf(stderr, "usage: %s <device>\n", argv[0]);
- exit(EXIT_FAILURE);
- }
-
- type = get_pt_type(argv[1]);
- if (type)
- printf("Partition type: %s\n", type);
- exit(EXIT_SUCCESS);
-}
-#endif
projects / util-linux / commitdiff