Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 205 insertions, 0 deletions

diff --git a/libfdisk/samples/mkpart.c b/libfdisk/samples/mkpart.c
new file mode 100644
index 0000000..1e5fd99
--- /dev/null
+++ b/libfdisk/samples/mkpart.c
@@ -0,0 +1,205 @@
+/*
+ * 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 size, for example:
+ *
+ *	mkpart --label dos --device /dev/sdc 2M 2M 2M 10M 1M -
+ *
+  * creates 6 partitions:
+  *	- 3 primary  (3x 2M)
+  *	- 1 extended (1x 10M)
+  *	- 2 logical  (1x 1M, 1x remaining-space-in-extended-partition)
+  *
+  * Notes:
+  *     The sample specifies size and partno for MBR, and size only for another
+  *     labels (e.g. GPT).
+  *
+  *     The Ask-API does not use anything else than warning/info. The
+  *     partitionning has to be done non-interactive.
+  */
+#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)
+{
+	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 n = 0, c, nopartno = 0;
+	unsigned int sectorsize;
+	uint64_t grain = 0;
+
+	static const struct option longopts[] = {
+		{ "label",  required_argument, NULL, 'x' },
+		{ "device", required_argument, NULL, 'd' },
+		{ "nopartno", no_argument, NULL, 'p' },
+		{ "grain", required_argument, NULL, 'g' },
+		{ "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, "g:x:d:h", longopts, NULL)) != -1) {
+		switch(c) {
+		case 'x':
+			label = optarg;
+			break;
+		case 'd':
+			device = optarg;
+			break;
+		case 'p':
+			nopartno = 1;
+			break;
+		case 'g':
+			grain = strtosize_or_err(optarg, "failed to parse grain");
+			break;
+		case 'h':
+			printf("%s [options] <size> ...", program_invocation_short_name);
+			fputs(USAGE_SEPARATOR, stdout);
+			fputs("Make disklabel and partitions.\n", stdout);
+			fputs(USAGE_OPTIONS, stdout);
+			fputs(" -x, --label <dos,gpt,...>    disk label type\n", stdout);
+			fputs(" -d, --device <path>          block device\n", stdout);
+			fputs(" -p, --nopartno               don't set partno (use default)\n", stdout);
+			fputs(" -h, --help                   this help\n", stdout);
+			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);
+
+	if (grain)
+		fdisk_save_user_grain(cxt, grain);
+
+	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");
+
+	sectorsize = fdisk_get_sector_size(cxt);
+
+	fdisk_disable_dialogs(cxt, 1);
+
+	while (optind < argc) {
+		int rc;
+		uint64_t size;
+		const char *str = argv[optind];
+
+		/* defaults */
+		fdisk_partition_start_follow_default(pa, 1);
+		fdisk_partition_end_follow_default(pa, 1);
+		fdisk_partition_partno_follow_default(pa, 1);
+
+		/* set size */
+		if (isdigit(*str)) {
+			size = strtosize_or_err(argv[optind], "failed to parse partition size");
+			fdisk_partition_set_size(pa, size / sectorsize);
+			fdisk_partition_end_follow_default(pa, 0);
+
+		} else if (*str == '-') {
+			fdisk_partition_end_follow_default(pa, 1);
+		}
+
+		if (fdisk_is_label(cxt, DOS)) {
+			/* For MBR we want to avoid primary/logical dialog.
+			 * This is possible by explicitly specified partition
+			 * number, <4 means primary, >=4 means logical.
+			 */
+			if (!nopartno) {
+				fdisk_partition_partno_follow_default(pa, 0);
+				fdisk_partition_set_partno(pa, n);
+			}
+
+			/* Make sure last primary partition is extended if user
+			 * wants more than 4 partitions.
+			 */
+			if (n == 3 && 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 #%d partition", n + 1);
+		}
+
+		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;
+}