daemon: Move gdisk function to a new file

After subsequent commits, this will be the only remaining use of
gdisk, so put it in its own file now.

daemon/Makefile.am

@@ -130,6 +130,7 @@ guestfsd_SOURCES = \
 	fs-min-size.c \
 	fsck.c \
 	fstrim.c \
+	gdisk.c \
 	glob.c \
 	grep.c \
 	grub.c \

daemon/gdisk.c

@@ -0,0 +1,48 @@
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2009-2024 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "daemon.h"
+#include "actions.h"
+#include "optgroups.h"
+
+int
+optgroup_gdisk_available (void)
+{
+  return prog_exists ("sgdisk");
+}
+
+int
+do_part_expand_gpt(const char *device)
+{
+  CLEANUP_FREE char *err = NULL;
+
+  int r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
+                    "sgdisk", "-e", device, NULL);
+
+  if (r == -1) {
+    reply_with_error ("%s -e %s: %s", "sgdisk", device, err);
+    return -1;
+  }
+
+  return 0;
+}

daemon/parted.c

@@ -456,12 +456,6 @@ do_part_set_mbr_id (const char *device, int partnum, int idbyte)
   return 0;
 }
 
-int
-optgroup_gdisk_available (void)
-{
-  return prog_exists ("sgdisk");
-}
-
 int
 do_part_set_gpt_type (const char *device, int partnum, const char *guid)
 {
@@ -662,19 +656,3 @@ do_part_set_disk_guid_random (const char *device)
 
   return 0;
 }
-
-int
-do_part_expand_gpt(const char *device)
-{
-  CLEANUP_FREE char *err = NULL;
-
-  int r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
-                    "sgdisk", "-e", device, NULL);
-
-  if (r == -1) {
-    reply_with_error ("%s -e %s: %s", "sgdisk", device, err);
-    return -1;
-  }
-
-  return 0;
-}