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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, 2026 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;
}
uuid
uint8_t uuid[16]
Definition f2fs.h:27