Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

295 lines (249 sloc) 9.206 kb
/*
fdisk.h
*/
#include "c.h"
#define DEFAULT_SECTOR_SIZE 512
#define MAX_SECTOR_SIZE 2048
#define SECTOR_SIZE 512 /* still used in BSD code */
#define MAXIMUM_PARTS 60
#define ACTIVE_FLAG 0x80
#define EXTENDED 0x05
#define WIN98_EXTENDED 0x0f
#define LINUX_PARTITION 0x81
#define LINUX_SWAP 0x82
#define LINUX_NATIVE 0x83
#define LINUX_EXTENDED 0x85
#define LINUX_LVM 0x8e
#define LINUX_RAID 0xfd
#define ALIGN_UP 1
#define ALIGN_DOWN 2
#define ALIGN_NEAREST 3
#define LINE_LENGTH 800
#define IS_EXTENDED(i) \
((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
#define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
#define scround(x) (((x)+units_per_sector-1)/units_per_sector)
/* fdisk debugging flags/options */
#define FDISK_DEBUG_INIT (1 << 1)
#define FDISK_DEBUG_CONTEXT (1 << 2)
#define FDISK_DEBUG_TOPOLOGY (1 << 3)
#define FDISK_DEBUG_GEOMETRY (1 << 4)
#define FDISK_DEBUG_LABEL (1 << 5)
#define FDISK_DEBUG_ALL 0xFFFF
# define ON_DBG(m, x) do { \
if ((FDISK_DEBUG_ ## m) & fdisk_debug_mask) { \
x; \
} \
} while (0)
# define DBG(m, x) do { \
if ((FDISK_DEBUG_ ## m) & fdisk_debug_mask) { \
fprintf(stderr, "%d: fdisk: %8s: ", getpid(), # m); \
x; \
} \
} while (0)
# define DBG_FLUSH do { \
if (fdisk_debug_mask && \
fdisk_debug_mask != FDISK_DEBUG_INIT) \
fflush(stderr); \
} while(0)
static inline void __attribute__ ((__format__ (__printf__, 1, 2)))
dbgprint(const char *mesg, ...)
{
va_list ap;
va_start(ap, mesg);
vfprintf(stderr, mesg, ap);
va_end(ap);
fputc('\n', stderr);
}
extern int fdisk_debug_mask;
extern void fdisk_init_debug(int mask);
struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
unsigned char sector; /* starting sector */
unsigned char cyl; /* starting cylinder */
unsigned char sys_ind; /* What partition type */
unsigned char end_head; /* end head */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned char start4[4]; /* starting sector counting from 0 */
unsigned char size4[4]; /* nr of sectors in partition */
} __attribute__ ((packed));
enum menutype {
MAIN_MENU,
EXPERT_MENU,
};
enum failure {
ioctl_error,
unable_to_read,
unable_to_seek,
unable_to_write
};
typedef unsigned long long sector_t;
/*
* Legacy CHS based geometry
*/
struct fdisk_geometry {
unsigned int heads;
sector_t sectors;
sector_t cylinders;
};
struct fdisk_context {
int dev_fd; /* device descriptor */
char *dev_path; /* device path */
unsigned char *firstsector; /* buffer with master boot record */
/* topology */
unsigned long io_size; /* I/O size used by fdisk */
unsigned long optimal_io_size; /* optional I/O returned by device */
unsigned long min_io_size; /* minimal I/O size */
unsigned long phy_sector_size; /* physical size */
unsigned long sector_size; /* logical size */
unsigned long alignment_offset;
unsigned long grain; /* alignment unit */
/* geometry */
sector_t total_sectors; /* in logical sectors */
struct fdisk_geometry geom;
/* label operations and description */
const struct fdisk_label *label;
};
/*
* Label specific operations
*/
struct fdisk_label {
const char *name;
/* probe disk label */
int (*probe)(struct fdisk_context *cxt);
/* write in-memory changes to disk */
int (*write)(struct fdisk_context *cxt);
/* verify the partition table */
int (*verify)(struct fdisk_context *cxt);
/* create new disk label */
int (*create)(struct fdisk_context *cxt);
/* new partition */
void (*part_add)(struct fdisk_context *cxt, int partnum, int parttype);
/* delete partition */
void (*part_delete)(struct fdisk_context *cxt, int partnum);
};
/*
* labels
*/
extern const struct fdisk_label aix_label;
extern const struct fdisk_label dos_label;
extern const struct fdisk_label bsd_label;
extern const struct fdisk_label mac_label;
extern const struct fdisk_label sun_label;
extern const struct fdisk_label sgi_label;
extern struct fdisk_context *fdisk_new_context_from_filename(const char *fname, int readonly);
extern int fdisk_dev_has_topology(struct fdisk_context *cxt);
extern int fdisk_dev_has_disklabel(struct fdisk_context *cxt);
extern int fdisk_dev_sectsz_is_default(struct fdisk_context *cxt);
extern void fdisk_free_context(struct fdisk_context *cxt);
extern void fdisk_zeroize_firstsector(struct fdisk_context *cxt);
extern int fdisk_context_force_sector_size(struct fdisk_context *cxt, sector_t s);
extern int fdisk_context_set_user_geometry(struct fdisk_context *cxt,
unsigned int cylinders, unsigned int heads,
unsigned int sectors);
extern int fdisk_delete_partition(struct fdisk_context *cxt, int partnum);
extern int fdisk_add_partition(struct fdisk_context *cxt, int partnum, int parttype);
extern int fdisk_write_disklabel(struct fdisk_context *cxt);
extern int fdisk_verify_disklabel(struct fdisk_context *cxt);
extern int fdisk_create_disklabel(struct fdisk_context *cxt, const char *name);
/* prototypes for fdisk.c */
extern char *line_ptr;
extern int partitions;
extern unsigned int display_in_cyl_units, units_per_sector;
extern void check_consistency(struct fdisk_context *cxt, struct partition *p, int partition);
extern void check_alignment(struct fdisk_context *cxt, sector_t lba, int partition);
extern void check(struct fdisk_context *cxt, int n, unsigned int h, unsigned int s, unsigned int c, unsigned int start);
extern void change_units(struct fdisk_context *cxt);
extern void fatal(struct fdisk_context *cxt, enum failure why);
extern int get_partition(struct fdisk_context *cxt, int warn, int max);
extern void list_types(struct systypes *sys);
extern int read_line (int *asked);
extern char read_char(char *mesg);
extern int read_hex(struct systypes *sys);
extern void reread_partition_table(struct fdisk_context *cxt, int leave);
extern struct partition *get_part_table(int);
extern unsigned int read_int(struct fdisk_context *cxt,
unsigned int low, unsigned int dflt,
unsigned int high, unsigned int base, char *mesg);
extern void print_menu(enum menutype);
extern void print_partition_size(struct fdisk_context *cxt, int num, sector_t start, sector_t stop, int sysid);
extern void fill_bounds(sector_t *first, sector_t *last);
extern char *partition_type(unsigned char type);
extern void update_units(struct fdisk_context *cxt);
extern char read_chars(char *mesg);
extern void set_changed(int);
extern void set_all_unchanged(void);
extern int warn_geometry(struct fdisk_context *cxt);
extern void warn_limits(struct fdisk_context *cxt);
extern void warn_alignment(struct fdisk_context *cxt);
extern unsigned int read_int_with_suffix(struct fdisk_context *cxt,
unsigned int low, unsigned int dflt, unsigned int high,
unsigned int base, char *mesg, int *is_suffix_used);
extern sector_t align_lba(struct fdisk_context *cxt, sector_t lba, int direction);
extern int get_partition_dflt(struct fdisk_context *cxt, int warn, int max, int dflt);
extern void update_sector_offset(struct fdisk_context *cxt);
#define PLURAL 0
#define SINGULAR 1
extern const char * str_units(int);
extern sector_t get_nr_sects(struct partition *p);
/*
* Supported partition table types (labels)
*/
enum fdisk_labeltype {
DOS_LABEL = 1,
SUN_LABEL = 2,
SGI_LABEL = 4,
AIX_LABEL = 8,
OSF_LABEL = 16,
MAC_LABEL = 32,
ANY_LABEL = -1
};
extern enum fdisk_labeltype disklabel;
extern int MBRbuffer_changed;
/* start_sect and nr_sects are stored little endian on all machines */
/* moreover, they are not aligned correctly */
static inline void
store4_little_endian(unsigned char *cp, unsigned int val) {
cp[0] = (val & 0xff);
cp[1] = ((val >> 8) & 0xff);
cp[2] = ((val >> 16) & 0xff);
cp[3] = ((val >> 24) & 0xff);
}
static inline unsigned int read4_little_endian(const unsigned char *cp)
{
return (unsigned int)(cp[0]) + ((unsigned int)(cp[1]) << 8)
+ ((unsigned int)(cp[2]) << 16)
+ ((unsigned int)(cp[3]) << 24);
}
static inline void set_nr_sects(struct partition *p, sector_t nr_sects)
{
store4_little_endian(p->size4, nr_sects);
}
static inline void set_start_sect(struct partition *p, unsigned int start_sect)
{
store4_little_endian(p->start4, start_sect);
}
static inline void seek_sector(struct fdisk_context *cxt, sector_t secno)
{
off_t offset = (off_t) secno * cxt->sector_size;
if (lseek(cxt->dev_fd, offset, SEEK_SET) == (off_t) -1)
fatal(cxt, unable_to_seek);
}
static inline void read_sector(struct fdisk_context *cxt, sector_t secno, unsigned char *buf)
{
seek_sector(cxt, secno);
if (read(cxt->dev_fd, buf, cxt->sector_size) != (ssize_t) cxt->sector_size)
fatal(cxt, unable_to_read);
}
static inline sector_t get_start_sect(struct partition *p)
{
return read4_little_endian(p->start4);
}
static inline int is_cleared_partition(struct partition *p)
{
return !(!p || p->boot_ind || p->head || p->sector || p->cyl ||
p->sys_ind || p->end_head || p->end_sector || p->end_cyl ||
get_start_sect(p) || get_nr_sects(p));
}
Jump to Line
Something went wrong with that request. Please try again.