mirror of
https://gitlab.freedesktop.org/libinput/libei.git
synced 2026-05-24 14:58:17 +02:00
1ddf8058e6
Our only use-case where we use this utility is for keymaps. Those have to be MAP_PRIVATE in wayland's wl_seat version 8 so let's do the same to make make sure we're compatible.
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* SPDX-License-Identifier: MIT */
|
|
/*
|
|
* Copyright © 2020 Red Hat, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "util-memfile.h"
|
|
#include "util-mem.h"
|
|
#include "util-io.h"
|
|
|
|
#include "util-object.h"
|
|
|
|
struct memfile {
|
|
struct object object;
|
|
int fd;
|
|
size_t size;
|
|
};
|
|
|
|
static void
|
|
memfile_destroy(struct memfile *memfile)
|
|
{
|
|
if (memfile->fd != -1)
|
|
close(memfile->fd);
|
|
}
|
|
|
|
static
|
|
OBJECT_IMPLEMENT_CREATE(memfile);
|
|
OBJECT_IMPLEMENT_UNREF_CLEANUP(memfile);
|
|
OBJECT_IMPLEMENT_REF(memfile);
|
|
OBJECT_IMPLEMENT_GETTER(memfile, fd, int);
|
|
OBJECT_IMPLEMENT_GETTER(memfile, size, size_t);
|
|
|
|
struct memfile *
|
|
memfile_new(const char *data, size_t sz) {
|
|
_unref_(memfile) *memfile = memfile_create(NULL);
|
|
|
|
_cleanup_close_ int fd = memfd_create("memfile", MFD_CLOEXEC|MFD_ALLOW_SEALING);
|
|
if (fd < 0)
|
|
return NULL;
|
|
|
|
fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK);
|
|
int rc = posix_fallocate(fd, 0, sz);
|
|
if (rc < 0)
|
|
return NULL;
|
|
|
|
memfile->fd = fd;
|
|
memfile->size = sz;
|
|
fd = -1;
|
|
|
|
void *map = mmap(NULL, sz, PROT_READ|PROT_WRITE, MAP_PRIVATE, memfile->fd, 0);
|
|
if (map == MAP_FAILED)
|
|
return NULL;
|
|
|
|
memcpy(map, data, sz);
|
|
munmap(map, sz);
|
|
|
|
return steal(&memfile);
|
|
}
|