1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <sys/uio.h>
20 #include <trusty_err.h>
21 
22 /*
23  * The following routines are functionally equivalent to libc read{v}/write{v}
24  * except how an error condition is handled. On error:
25  *    read{v}/write{v} returns -1 and sets errno
26  *    trusty_read(v)/trusty_write{v} return negative LK error instead
27  */
28 ssize_t trusty_readv(int fd, const struct iovec* iov, int iovcnt);
29 ssize_t trusty_read(int fd, void* buf, size_t count);
30 ssize_t trusty_writev(int fd, const struct iovec* iov, int iovcnt);
31 ssize_t trusty_write(int fd, const void* buf, size_t count);
32