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/*
* Copyright (C) 2017 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*
*
* Libfdisk sample to create partitions by specify all required partition
* properties (partno, start and size). The default is only partition type
* (except MBR where 4th partition is extended).
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <getopt.h>
#include "c.h"
#include "nls.h"
#include "strutils.h"
#include "xalloc.h"
#include "libfdisk.h"
static int ask_callback(struct fdisk_context *cxt __attribute__((__unused__)),
struct fdisk_ask *ask,
void *data __attribute__((unused)))
{
switch(fdisk_ask_get_type(ask)) {
case FDISK_ASKTYPE_INFO:
fputs(fdisk_ask_print_get_mesg(ask), stdout);
fputc('\n', stdout);
break;
case FDISK_ASKTYPE_WARNX:
fflush(stdout);
fputs(fdisk_ask_print_get_mesg(ask), stderr);
fputc('\n', stderr);
break;
case FDISK_ASKTYPE_WARN:
fflush(stdout);
fputs(fdisk_ask_print_get_mesg(ask), stderr);
errno = fdisk_ask_print_get_errno(ask);
fprintf(stderr, ": %m\n");
break;
default:
break;
}
return 0;
}
int main(int argc, char *argv[])
{
struct fdisk_context *cxt;
struct fdisk_partition *pa;
const char *label = NULL, *device = NULL;
int c;
size_t n = 1;
static const struct option longopts[] = {
{ "label", required_argument, NULL, 'x' },
{ "device", required_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 },
};
setlocale(LC_ALL, ""); /* just to have enable UTF8 chars */
fdisk_init_debug(0);
while((c = getopt_long(argc, argv, "x:d:h", longopts, NULL)) != -1) {
switch(c) {
case 'x':
label = optarg;
break;
case 'd':
device = optarg;
break;
case 'h':
printf("%s [options] -- <partno,start,size> ...", program_invocation_short_name);
fputs(USAGE_SEPARATOR, stdout);
puts("Make disklabel and partitions.");
puts(" <partno> 1..n (4th is extended for MBR), or '-' for default");
puts(" <start> partition start offset in sectors");
puts(" <size> partition size in sectors");
fputs(USAGE_OPTIONS, stdout);
puts(" -x, --label <dos,gpt,...> disk label type (default MBR)");
puts(" -d, --device <path> block device");
puts(" -h, --help this help");
fputs(USAGE_SEPARATOR, stdout);
return EXIT_SUCCESS;
}
}
if (!device)
errx(EXIT_FAILURE, "no device specified");
if (!label)
label = "dos";
cxt = fdisk_new_context();
if (!cxt)
err_oom();
fdisk_set_ask(cxt, ask_callback, NULL);
pa = fdisk_new_partition();
if (!pa)
err_oom();
if (fdisk_assign_device(cxt, device, 0))
err(EXIT_FAILURE, "failed to assign device");
if (fdisk_create_disklabel(cxt, label))
err(EXIT_FAILURE, "failed to create disk label");
fdisk_disable_dialogs(cxt, 1);
while (optind < argc) {
int rc;
unsigned int partno = 0;
uint64_t start = 0, size = 0;
const char *str = argv[optind];
fdisk_reset_partition(pa);
fdisk_partition_end_follow_default(pa, 0);
if (*str == '-') {
/* partno unspecified */
if (sscanf(str, "-,%"SCNu64",%"SCNu64"", &start, &size) != 2)
errx(EXIT_FAILURE, "failed to parse %s", str);
fdisk_partition_partno_follow_default(pa, 1);
fdisk_partition_unset_partno(pa);
} else {
/* partno specified */
if (sscanf(str, "%u,%"SCNu64",%"SCNu64"", &partno, &start, &size) != 3)
errx(EXIT_FAILURE, "failed to parse %s", str);
fdisk_partition_partno_follow_default(pa, 0);
fdisk_partition_set_partno(pa, partno - 1); /* library uses 0..n */
}
fdisk_partition_set_start(pa, start);
fdisk_partition_set_size(pa, size);
if (fdisk_partition_has_partno(pa))
fprintf(stdout, "Requested partition: <partno=%zu,start=%ju,size=%ju>\n",
fdisk_partition_get_partno(pa),
(uintmax_t) fdisk_partition_get_start(pa),
(uintmax_t) fdisk_partition_get_size(pa));
else
fprintf(stdout, "Requested partition: <partno=<default>,start=%ju,size=%ju>\n",
(uintmax_t) fdisk_partition_get_start(pa),
(uintmax_t) fdisk_partition_get_size(pa));
if (fdisk_is_label(cxt, DOS)) {
/* Make sure last primary partition is extended if user
* wants more than 4 partitions.
*/
if ((partno == 4 || (n == 4 && !fdisk_partition_has_partno(pa)))
&& optind + 1 < argc) {
struct fdisk_parttype *type =
fdisk_label_parse_parttype(
fdisk_get_label(cxt, NULL), "05");
if (!type)
err_oom();
fdisk_partition_set_type(pa, type);
fdisk_unref_parttype(type);
}
}
rc = fdisk_add_partition(cxt, pa, NULL);
if (rc) {
errno = -rc;
errx(EXIT_FAILURE, "failed to add #%zu partition",
fdisk_partition_has_partno(pa) ?
fdisk_partition_get_partno(pa) + 1: n);
}
fdisk_reset_partition(pa);
optind++;
n++;
}
if (fdisk_write_disklabel(cxt))
err(EXIT_FAILURE, "failed to write disk label");
fdisk_deassign_device(cxt, 1);
fdisk_unref_context(cxt);
fdisk_unref_partition(pa);
return EXIT_SUCCESS;
}
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