1 /*
2 * Copyright (c) 2022, Google, Inc. All rights reserved
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files
6 * (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify, merge,
8 * publish, distribute, sublicense, and/or sell copies of the Software,
9 * and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include <debug.h>
25 #include <err.h>
26 #include <sys/uio.h>
27 #include <trusty/io_handle.h>
28 #include <trusty/uio.h>
29
trusty_writev(int fd,const struct iovec * iov,int iovcnt)30 ssize_t trusty_writev(int fd, const struct iovec* iov, int iovcnt) {
31 bool should_output = LK_DEBUGLEVEL_INFO <= LK_LOGLEVEL;
32
33 io_handle_t* io_handle = fd_io_handle(fd);
34 if (io_handle == NULL) {
35 return ERR_BAD_HANDLE;
36 }
37
38 if (should_output) {
39 io_lock(io_handle);
40 }
41
42 ssize_t ret = 0;
43 ssize_t total_bytes = 0;
44 if (should_output) {
45 for (int i = 0; i < iovcnt; i++, iov++) {
46 if (iov == NULL) {
47 ret = ERR_INVALID_ARGS;
48 goto write_done;
49 }
50 ret = io_write(io_handle, (const void*)iov->iov_base, iov->iov_len);
51 if (ret < 0) {
52 goto write_done;
53 }
54 total_bytes += ret;
55 }
56 }
57 ret = total_bytes;
58 write_done:
59 if (should_output) {
60 io_write_commit(io_handle);
61 io_unlock(io_handle);
62 }
63 return ret;
64 }
65