void list_disk_geometry(struct fdisk_context *cxt)
{
char *id = NULL;
uint64_t bytes = cxt->total_sectors * cxt->sector_size;
char *strsz = size_to_human_string(SIZE_SUFFIX_SPACE
| SIZE_SUFFIX_3LETTER, bytes);
fdisk_colon(cxt, _("Disk %s: %s, %ju bytes, %ju sectors"),
cxt->dev_path, strsz,
bytes, (uintmax_t) cxt->total_sectors);
free(strsz);
if (fdisk_require_geometry(cxt) || fdisk_context_use_cylinders(cxt))
fdisk_colon(cxt, _("Geometry: %d heads, %llu sectors/track, %llu cylinders"),
cxt->geom.heads, cxt->geom.sectors, cxt->geom.cylinders);
fdisk_colon(cxt, _("Units: %s of %d * %ld = %ld bytes"),
fdisk_context_get_unit(cxt, PLURAL),
fdisk_context_get_units_per_sector(cxt),
cxt->sector_size,
fdisk_context_get_units_per_sector(cxt) * cxt->sector_size);
fdisk_colon(cxt, _("Sector size (logical/physical): %lu bytes / %lu bytes"),
cxt->sector_size, cxt->phy_sector_size);
fdisk_colon(cxt, _("I/O size (minimum/optimal): %lu bytes / %lu bytes"),
cxt->min_io_size, cxt->io_size);
if (cxt->alignment_offset)
fdisk_colon(cxt, _("Alignment offset: %lu bytes"),
cxt->alignment_offset);
if (fdisk_dev_has_disklabel(cxt))
fdisk_colon(cxt, _("Disklabel type: %s"), cxt->label->name);
if (fdisk_get_disklabel_id(cxt, &id) == 0 && id)
fdisk_colon(cxt, _("Disk identifier: %s"), id);
}
static void print_device_pt(struct fdisk_context *cxt, char *device)
{
if (fdisk_context_assign_device(cxt, device, 1) != 0) /* read-only */
err(EXIT_FAILURE, _("cannot open %s"), device);
list_disk_geometry(cxt);
if (fdisk_dev_has_disklabel(cxt))
fdisk_list_disklabel(cxt);
fputc('\n', stdout);
}
/**
* fdisk_context_assign_device:
* @fname: path to the device to be handled
* @readonly: how to open the device
*
* If the @readonly flag is set to false, fdisk will attempt to open
* the device with read-write mode and will fallback to read-only if
* unsuccessful.
*
* Returns: 0 on success, < 0 on error.
*/
int fdisk_context_assign_device(struct fdisk_context *cxt,
const char *fname, int readonly)
{
int fd;
DBG(CONTEXT, dbgprint("assigning device %s", fname));
assert(cxt);
reset_context(cxt);
if (readonly == 1 || (fd = open(fname, O_RDWR|O_CLOEXEC)) < 0) {
if ((fd = open(fname, O_RDONLY|O_CLOEXEC)) < 0)
return -errno;
readonly = 1;
}
cxt->dev_fd = fd;
cxt->dev_path = strdup(fname);
if (!cxt->dev_path)
goto fail;
fdisk_discover_topology(cxt);
fdisk_discover_geometry(cxt);
if (fdisk_read_firstsector(cxt) < 0)
goto fail;
/* detect labels and apply labes specific stuff (e.g geomery)
* to the context */
fdisk_probe_labels(cxt);
/* let's apply user geometry *after* label prober
* to make it possible to override in-label setting */
fdisk_apply_user_device_properties(cxt);
/* warn about obsolete stuff on the device if we aren't in
* list-only mode and there is not PT yet */
if (!fdisk_context_listonly(cxt) && !fdisk_dev_has_disklabel(cxt))
warn_wipe(cxt);
DBG(CONTEXT, dbgprint("context %p initialized for %s [%s]",
cxt, fname,
readonly ? "READ-ONLY" : "READ-WRITE"));
return 0;
fail:
DBG(CONTEXT, dbgprint("failed to assign device"));
return -errno;
}
/*
* This function prints a warning if the device is not wiped (e.g. wipefs(8).
* Please don't call this function if there is already a PT.
*
* Returns: 0 if nothing found, < 0 on error, 1 if found a signature
*/
static int warn_wipe(struct fdisk_context *cxt)
{
#ifdef HAVE_LIBBLKID
blkid_probe pr;
#endif
int rc = 0;
assert(cxt);
if (fdisk_dev_has_disklabel(cxt) || cxt->dev_fd < 0)
return -EINVAL;
#ifdef HAVE_LIBBLKID
DBG(LABEL, dbgprint("wipe check: initialize libblkid prober"));
pr = blkid_new_probe();
if (!pr)
return -ENOMEM;
rc = blkid_probe_set_device(pr, cxt->dev_fd, 0, 0);
if (rc)
return rc;
blkid_probe_enable_superblocks(pr, 1);
blkid_probe_set_superblocks_flags(pr, BLKID_SUBLKS_TYPE);
blkid_probe_enable_partitions(pr, 1);
/* we care about the first found FS/raid, so don't call blkid_do_probe()
* in loop or don't use blkid_do_fullprobe() ... */
rc = blkid_do_probe(pr);
if (rc == 0) {
const char *name = NULL;
if (blkid_probe_lookup_value(pr, "TYPE", &name, 0) == 0 ||
blkid_probe_lookup_value(pr, "PTTYPE", &name, 0) == 0) {
fdisk_warnx(cxt, _(
"%s: device contains a valid '%s' signature, it's "
"strongly recommended to wipe the device by command wipefs(8) "
"if this setup is unexpected to avoid "
"possible collisions."), cxt->dev_path, name);
rc = 1;
}
}
blkid_free_probe(pr);
#endif
return rc;
}
int main(int argc, char **argv)
{
int i, c, act = ACT_FDISK;
int colormode = UL_COLORMODE_AUTO;
struct fdisk_context *cxt;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
fdisk_init_debug(0);
cxt = fdisk_new_context();
if (!cxt)
err(EXIT_FAILURE, _("failed to allocate libfdisk context"));
fdisk_context_set_ask(cxt, ask_callback, NULL);
while ((c = getopt(argc, argv, "b:c::C:hH:lL::sS:t:u::vV")) != -1) {
switch (c) {
case 'b':
{
size_t sz = strtou32_or_err(optarg,
_("invalid sector size argument"));
if (sz != 512 && sz != 1024 && sz != 2048 && sz != 4096)
usage(stderr);
fdisk_save_user_sector_size(cxt, sz, sz);
break;
}
case 'C':
fdisk_save_user_geometry(cxt,
strtou32_or_err(optarg,
_("invalid cylinders argument")),
0, 0);
break;
case 'c':
if (optarg) {
/* this setting is independent on the current
* actively used label */
struct fdisk_label *lb = fdisk_context_get_label(cxt, "dos");
if (!lb)
err(EXIT_FAILURE, _("not found DOS label driver"));
if (strcmp(optarg, "=dos") == 0)
fdisk_dos_enable_compatible(lb, TRUE);
else if (strcmp(optarg, "=nondos") == 0)
fdisk_dos_enable_compatible(lb, FALSE);
else
usage(stderr);
}
/* use default if no optarg specified */
break;
case 'H':
fdisk_save_user_geometry(cxt, 0,
strtou32_or_err(optarg,
_("invalid heads argument")),
0);
break;
case 'S':
fdisk_save_user_geometry(cxt, 0, 0,
strtou32_or_err(optarg,
_("invalid sectors argument")));
break;
case 'l':
act = ACT_LIST;
break;
case 'L':
if (optarg)
colormode = colormode_or_err(optarg,
_("unsupported color mode"));
break;
case 's':
act = ACT_SHOWSIZE;
break;
case 't':
{
struct fdisk_label *lb = NULL;
while (fdisk_context_next_label(cxt, &lb) == 0)
fdisk_label_set_disabled(lb, 1);
lb = fdisk_context_get_label(cxt, optarg);
if (!lb)
errx(EXIT_FAILURE, _("unsupported disklabel: %s"), optarg);
fdisk_label_set_disabled(lb, 0);
}
case 'u':
if (optarg && *optarg == '=')
optarg++;
if (fdisk_context_set_unit(cxt, optarg) != 0)
usage(stderr);
break;
case 'V':
case 'v':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
case 'h':
usage(stdout);
default:
usage(stderr);
}
}
if (argc-optind != 1 && fdisk_has_user_device_properties(cxt))
warnx(_("The device properties (sector size and geometry) should"
" be used with one specified device only."));
colors_init(colormode);
switch (act) {
case ACT_LIST:
fdisk_context_enable_listonly(cxt, 1);
if (argc > optind) {
int k;
for (k = optind; k < argc; k++)
print_device_pt(cxt, argv[k]);
} else
print_all_devices_pt(cxt);
break;
case ACT_SHOWSIZE:
/* deprecated */
if (argc - optind <= 0)
usage(stderr);
for (i = optind; i < argc; i++) {
if (argc - optind == 1)
printf("%llu\n", get_dev_blocks(argv[i]));
else
printf("%s: %llu\n", argv[i], get_dev_blocks(argv[i]));
}
break;
case ACT_FDISK:
if (argc-optind != 1)
usage(stderr);
if (fdisk_context_assign_device(cxt, argv[optind], 0) != 0)
err(EXIT_FAILURE, _("cannot open %s"), argv[optind]);
/* Here starts interactive mode, use fdisk_{warn,info,..} functions */
color_enable(UL_COLOR_GREEN);
fdisk_info(cxt, _("Welcome to fdisk (%s)."), PACKAGE_STRING);
color_disable();
fdisk_info(cxt, _("Changes will remain in memory only, until you decide to write them.\n"
"Be careful before using the write command.\n"));
fflush(stdout);
if (!fdisk_dev_has_disklabel(cxt)) {
fdisk_warnx(cxt, _("Device does not contain a recognized partition table."));
fdisk_create_disklabel(cxt, NULL);
}
while (1)
process_fdisk_menu(&cxt);
}
fdisk_free_context(cxt);
return EXIT_SUCCESS;
}
