mirror of
https://gitlab.freedesktop.org/libinput/libei.git
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1b4a0d7c1a
Assisted-by: Claude:claude-opus-4-6 Part-of: <https://gitlab.freedesktop.org/libinput/libei/-/merge_requests/388>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2020 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#if HAVE_MEMFD_CREATE
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#include <fcntl.h>
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#include <stddef.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include "util-io.h"
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#include "util-mem.h"
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#include "util-memfile.h"
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#include "util-object.h"
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struct memfile {
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struct object object;
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int fd;
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size_t size;
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};
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static void
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memfile_destroy(struct memfile *memfile)
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{
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if (memfile->fd != -1)
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close(memfile->fd);
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}
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static OBJECT_IMPLEMENT_CREATE(memfile);
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OBJECT_IMPLEMENT_UNREF_CLEANUP(memfile);
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OBJECT_IMPLEMENT_REF(memfile);
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OBJECT_IMPLEMENT_GETTER(memfile, fd, int);
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OBJECT_IMPLEMENT_GETTER(memfile, size, size_t);
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struct memfile *
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memfile_new(const char *data, size_t sz)
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{
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_unref_(memfile) *memfile = memfile_create(NULL);
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_cleanup_close_ int fd = memfd_create("memfile", MFD_CLOEXEC | MFD_ALLOW_SEALING);
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if (fd < 0)
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return NULL;
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if (fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK) < 0)
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return NULL;
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int rc;
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with_signals_blocked(SIGALRM)
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{
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rc = SYSCALL(posix_fallocate(fd, 0, sz));
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}
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if (rc < 0)
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return NULL;
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memfile->fd = fd;
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memfile->size = sz;
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fd = -1;
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void *map = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_SHARED, memfile->fd, 0);
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if (map == MAP_FAILED)
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return NULL;
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memcpy(map, data, sz);
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munmap(map, sz);
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return steal(&memfile);
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}
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#endif
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