diff options
Diffstat (limited to 'util-linux/fdisk.c')
| -rw-r--r-- | util-linux/fdisk.c | 79 |
1 files changed, 57 insertions, 22 deletions
diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c index b6417a3..3f2e0d3 100644 --- a/util-linux/fdisk.c +++ b/util-linux/fdisk.c @@ -107,12 +107,30 @@ struct partition { unsigned char size4[4]; /* nr of sectors in partition */ } PACKED; +/* + * per partition table entry data + * + * The four primary partitions have the same sectorbuffer (MBRbuffer) + * and have NULL ext_pointer. + * Each logical partition table entry has two pointers, one for the + * partition and one link to the next one. + */ +struct pte { + struct partition *part_table; /* points into sectorbuffer */ + struct partition *ext_pointer; /* points into sectorbuffer */ + sector_t offset_from_dev_start; /* disk sector number */ + char *sectorbuffer; /* disk sector contents */ +#if ENABLE_FEATURE_FDISK_WRITABLE + char changed; /* boolean */ +#endif +}; + #define unable_to_open "can't open '%s'" #define unable_to_read "can't read from %s" #define unable_to_seek "can't seek on %s" enum label_type { - LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF + LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF, LABEL_GPT }; #define LABEL_IS_DOS (LABEL_DOS == current_label_type) @@ -149,6 +167,14 @@ enum label_type { #define STATIC_OSF extern #endif +#if ENABLE_FEATURE_GPT_LABEL +#define LABEL_IS_GPT (LABEL_GPT == current_label_type) +#define STATIC_GPT static +#else +#define LABEL_IS_GPT 0 +#define STATIC_GPT extern +#endif + enum action { OPEN_MAIN, TRY_ONLY, CREATE_EMPTY_DOS, CREATE_EMPTY_SUN }; static void update_units(void); @@ -162,6 +188,7 @@ static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t ba #endif static const char *partition_type(unsigned char type); static void get_geometry(void); +static void read_pte(struct pte *pe, sector_t offset); #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE static int get_boot(enum action what); #else @@ -174,24 +201,6 @@ static int get_boot(void); static sector_t get_start_sect(const struct partition *p); static sector_t get_nr_sects(const struct partition *p); -/* - * per partition table entry data - * - * The four primary partitions have the same sectorbuffer (MBRbuffer) - * and have NULL ext_pointer. - * Each logical partition table entry has two pointers, one for the - * partition and one link to the next one. - */ -struct pte { - struct partition *part_table; /* points into sectorbuffer */ - struct partition *ext_pointer; /* points into sectorbuffer */ - sector_t offset_from_dev_start; /* disk sector number */ - char *sectorbuffer; /* disk sector contents */ -#if ENABLE_FEATURE_FDISK_WRITABLE - char changed; /* boolean */ -#endif -}; - /* DOS partition types */ static const char *const i386_sys_types[] = { @@ -653,6 +662,8 @@ STATIC_OSF void bsd_select(void); STATIC_OSF void xbsd_print_disklabel(int); #include "fdisk_osf.c" +#include "fdisk_gpt.c" + #if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_SUN_LABEL static uint16_t fdisk_swap16(uint16_t x) @@ -833,6 +844,11 @@ menu(void) puts("o\tcreate a new empty DOS partition table"); puts("q\tquit without saving changes"); puts("s\tcreate a new empty Sun disklabel"); /* sun */ + } else if (LABEL_IS_GPT) { + puts("o\tcreate a new empty DOS partition table"); + puts("p\tprint the partition table"); + puts("q\tquit without saving changes"); + puts("s\tcreate a new empty Sun disklabel"); /* sun */ } else { puts("a\ttoggle a bootable flag"); puts("b\tedit bsd disklabel"); @@ -1308,7 +1324,18 @@ get_geometry(void) /* * Opens disk_device and optionally reads MBR. - * FIXME: document what each 'what' value will do! + * If what == OPEN_MAIN: + * Open device, read MBR. Abort program on short read. Create empty + * disklabel if the on-disk structure is invalid (WRITABLE mode). + * If what == TRY_ONLY: + * Open device, read MBR. Return an error if anything is out of place. + * Do not create an empty disklabel. This is used for the "list" + * operations: "fdisk -l /dev/sda" and "fdisk -l" (all devices). + * If what == CREATE_EMPTY_*: + * This means that get_boot() was called recursively from create_*label(). + * Do not re-open the device; just set up the ptes array and print + * geometry warnings. + * * Returns: * -1: no 0xaa55 flag present (possibly entire disk BSD) * 0: found or created label @@ -1390,6 +1417,10 @@ static int get_boot(void) if (check_aix_label()) return 0; #endif +#if ENABLE_FEATURE_GPT_LABEL + if (check_gpt_label()) + return 0; +#endif #if ENABLE_FEATURE_OSF_LABEL if (check_osf_label()) { possibly_osf_label = 1; @@ -1409,7 +1440,7 @@ static int get_boot(void) if (!valid_part_table_flag(MBRbuffer)) { if (what == OPEN_MAIN) { printf("Device contains neither a valid DOS " - "partition table, nor Sun, SGI or OSF " + "partition table, nor Sun, SGI, OSF or GPT " "disklabel\n"); #ifdef __sparc__ IF_FEATURE_SUN_LABEL(create_sunlabel();) @@ -2056,10 +2087,14 @@ list_table(int xtra) sun_list_table(xtra); return; } - if (LABEL_IS_SUN) { + if (LABEL_IS_SGI) { sgi_list_table(xtra); return; } + if (LABEL_IS_GPT) { + gpt_list_table(xtra); + return; + } list_disk_geometry(); |