From: Karel Zak <kzak@redhat.com>
Date: Tue, 3 Sep 2013 15:35:15 +0000 (+0200)
Subject: libfdisk: add fdisk_locate_disklabel()
X-Git-Tag: v2.24-rc1~94
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0d20aae6fb4fe5dfdb314ff11858ba2afadab67;p=thirdparty%2Futil-linux.git

libfdisk: add fdisk_locate_disklabel()

The function returns offset and size of disklabel elements.

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/libfdisk/src/fdiskP.h b/libfdisk/src/fdiskP.h
index 8c9fc71e07..45a93c8c3d 100644
--- a/libfdisk/src/fdiskP.h
+++ b/libfdisk/src/fdiskP.h
@@ -148,6 +148,9 @@ struct fdisk_label_operations {
 	int (*create)(struct fdisk_context *cxt);
 	/* list partition table */
 	int (*list)(struct fdisk_context *cxt);
+	/* returns offset and size of the 'n' part of the PT */
+	int (*locate)(struct fdisk_context *cxt, int n, const char **name, off_t *offset, size_t *size);
+
 	/* get disk label ID */
 	int (*get_id)(struct fdisk_context *cxt, char **id);
 	/* set disk label ID */
diff --git a/libfdisk/src/label.c b/libfdisk/src/label.c
index 147918e032..95a0abfb95 100644
--- a/libfdisk/src/label.c
+++ b/libfdisk/src/label.c
@@ -245,6 +245,20 @@ int fdisk_create_disklabel(struct fdisk_context *cxt, const char *name)
 	return cxt->label->op->create(cxt);
 }
 
+
+int fdisk_locate_disklabel(struct fdisk_context *cxt, int n, const char **name,
+			   off_t *offset, size_t *size)
+{
+	if (!cxt || !cxt->label)
+		return -EINVAL;
+	if (!cxt->label->op->locate)
+		return -ENOSYS;
+
+	DBG(LABEL, dbgprint("locating %d chunk of %s.", n, cxt->label->name));
+	return cxt->label->op->locate(cxt, n, name, offset, size);
+}
+
+
 /**
  * fdisk_get_disklabel_id:
  * @cxt: fdisk context
diff --git a/libfdisk/src/libfdisk.h b/libfdisk/src/libfdisk.h
index 0175a8d0f4..7ad3560679 100644
--- a/libfdisk/src/libfdisk.h
+++ b/libfdisk/src/libfdisk.h
@@ -127,6 +127,7 @@ 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);
 extern int fdisk_list_disklabel(struct fdisk_context *cxt);
+extern int fdisk_locate_disklabel(struct fdisk_context *cxt, int n, const char **name, off_t *offset, size_t *size);
 
 extern int fdisk_get_disklabel_id(struct fdisk_context *cxt, char **id);
 extern int fdisk_set_disklabel_id(struct fdisk_context *cxt);