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-rw-r--r--src/shared/memfd-util.c171
1 files changed, 0 insertions, 171 deletions
diff --git a/src/shared/memfd-util.c b/src/shared/memfd-util.c
deleted file mode 100644
index e99a738e1f..0000000000
--- a/src/shared/memfd-util.c
+++ /dev/null
@@ -1,171 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-
-#ifdef HAVE_LINUX_MEMFD_H
-# include <linux/memfd.h>
-#endif
-
-#include "util.h"
-#include "memfd-util.h"
-#include "utf8.h"
-#include "missing.h"
-
-int memfd_new(const char *name) {
- _cleanup_free_ char *g = NULL;
- int fd;
-
- if (!name) {
- char pr[17] = {};
-
- /* If no name is specified we generate one. We include
- * a hint indicating our library implementation, and
- * add the thread name to it */
-
- assert_se(prctl(PR_GET_NAME, (unsigned long) pr) >= 0);
-
- if (isempty(pr))
- name = "sd";
- else {
- _cleanup_free_ char *e = NULL;
-
- e = utf8_escape_invalid(pr);
- if (!e)
- return -ENOMEM;
-
- g = strappend("sd-", e);
- if (!g)
- return -ENOMEM;
-
- name = g;
- }
- }
-
- fd = memfd_create(name, MFD_ALLOW_SEALING | MFD_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- return fd;
-}
-
-int memfd_map(int fd, uint64_t offset, size_t size, void **p) {
- void *q;
- int sealed;
-
- assert(fd >= 0);
- assert(size > 0);
- assert(p);
-
- sealed = memfd_get_sealed(fd);
- if (sealed < 0)
- return sealed;
-
- if (sealed)
- q = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, offset);
- else
- q = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, offset);
-
- if (q == MAP_FAILED)
- return -errno;
-
- *p = q;
- return 0;
-}
-
-int memfd_set_sealed(int fd) {
- int r;
-
- assert(fd >= 0);
-
- r = fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL);
- if (r < 0)
- return -errno;
-
- return 0;
-}
-
-int memfd_get_sealed(int fd) {
- int r;
-
- assert(fd >= 0);
-
- r = fcntl(fd, F_GET_SEALS);
- if (r < 0)
- return -errno;
-
- return r == (F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL);
-}
-
-int memfd_get_size(int fd, uint64_t *sz) {
- struct stat stat;
- int r;
-
- assert(fd >= 0);
- assert(sz);
-
- r = fstat(fd, &stat);
- if (r < 0)
- return -errno;
-
- *sz = stat.st_size;
- return 0;
-}
-
-int memfd_set_size(int fd, uint64_t sz) {
- int r;
-
- assert(fd >= 0);
-
- r = ftruncate(fd, sz);
- if (r < 0)
- return -errno;
-
- return 0;
-}
-
-int memfd_new_and_map(const char *name, size_t sz, void **p) {
- _cleanup_close_ int fd = -1;
- int r;
-
- assert(sz > 0);
- assert(p);
-
- fd = memfd_new(name);
- if (fd < 0)
- return fd;
-
- r = memfd_set_size(fd, sz);
- if (r < 0)
- return r;
-
- r = memfd_map(fd, 0, sz, p);
- if (r < 0)
- return r;
-
- r = fd;
- fd = -1;
-
- return r;
-}