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-rw-r--r--libparted/labels/misc.h48
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diff --git a/libparted/labels/misc.h b/libparted/labels/misc.h
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+/* -*- Mode: c; indent-tabs-mode: nil -*-
+
+ libparted - a library for manipulating disk partitions
+ Copyright (C) 2007, 2009-2014, 2019-2023 Free Software Foundation, 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 3 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, see <http://www.gnu.org/licenses/>. */
+
+#include <inttypes.h>
+#include <uuid/uuid.h>
+
+/* hack: use the ext2 uuid library to generate a reasonably random (hopefully
+ * with /dev/random) number. Unfortunately, we can only use 4 bytes of it.
+ * We make sure to avoid returning zero which may be interpreted as no FAT
+ * serial number or no MBR signature.
+ */
+static inline uint32_t
+generate_random_uint32 (void)
+{
+ union {
+ uuid_t uuid;
+ uint32_t i;
+ } uu32;
+
+ uuid_generate (uu32.uuid);
+
+ return uu32.i > 0 ? uu32.i : 0xffffffff;
+}
+
+/* Return nonzero if FS_TYPE_NAME starts with "linux-swap".
+ This must match the NUL-terminated "linux-swap" as well
+ as "linux-swap(v0)" and "linux-swap(v1)". */
+static inline int
+is_linux_swap (char const *fs_type_name)
+{
+ char const *prefix = "linux-swap";
+ return strncmp (fs_type_name, prefix, strlen (prefix)) == 0;
+}