1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * ----------------------------------------------------------------------- */
27
28 /*
29 * serial_write.c
30 *
31 * Raw writing to the serial port; no \n -> \r\n translation
32 */
33
34 #include <errno.h>
35 #include <string.h>
36 #include <com32.h>
37 #include <core.h>
38 #include <minmax.h>
39 #include <syslinux/config.h>
40 #include "file.h"
41
__serial_write(struct file_info * fp,const void * buf,size_t count)42 ssize_t __serial_write(struct file_info *fp, const void *buf, size_t count)
43 {
44 const char *bufp = buf;
45 size_t n = 0;
46
47 (void)fp;
48
49 if (!syslinux_serial_console_info()->iobase)
50 return count; /* Nothing to do */
51
52 while (count--) {
53 write_serial(*bufp++);
54 n++;
55 }
56
57 return n;
58 }
59
60 const struct output_dev dev_serial_w = {
61 .dev_magic = __DEV_MAGIC,
62 .flags = __DEV_TTY | __DEV_OUTPUT,
63 .fileflags = O_WRONLY | O_CREAT | O_TRUNC | O_APPEND,
64 .write = __serial_write,
65 .close = NULL,
66 .open = NULL,
67 };
68