1 #ident "$Id: rawcon_read.c,v 1.5 2005/01/20 18:41:12 hpa Exp $"
2 /* ----------------------------------------------------------------------- *
4 * Copyright 2004 H. Peter Anvin - All Rights Reserved
6 * Permission is hereby granted, free of charge, to any person
7 * obtaining a copy of this software and associated documentation
8 * files (the "Software"), to deal in the Software without
9 * restriction, including without limitation the rights to use,
10 * copy, modify, merge, publish, distribute, sublicense, and/or
11 * sell copies of the Software, and to permit persons to whom
12 * the Software is furnished to do so, subject to the following
15 * The above copyright notice and this permission notice shall
16 * be included in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
20 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
27 * ----------------------------------------------------------------------- */
32 * Character-oriented reading from the console without echo;
33 * this is a NONBLOCKING device.
40 #include <sys/times.h>
43 /* Global, since it's used by stdcon_read */
44 ssize_t __rawcon_read(struct file_info *fp, void *buf, size_t count)
46 com32sys_t ireg, oreg;
53 memset(&ireg, 0, sizeof ireg);
60 __intcall(0x21, &ireg, &oreg);
64 /* We have data, go get it */
66 __intcall(0x21, &ireg, &oreg);
67 *bufp++ = oreg.eax.b[0];
74 const struct input_dev dev_rawcon_r = {
75 .dev_magic = __DEV_MAGIC,
76 .flags = __DEV_TTY | __DEV_INPUT,
77 .fileflags = O_RDONLY,
78 .read = __rawcon_read,