1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* Copyright 1999 Egbert Eich
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the authors not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/ioctl.h>
#include <sys/vt.h>
#include <sys/kd.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include "debug.h"
#include "v86bios.h"
console
open_console(void)
{
int fd;
int VTno;
char VTname[11];
console Con = {-1,-1};
struct vt_stat vts;
if (NO_CONSOLE)
return Con;
if ((fd = open("/dev/tty0",O_WRONLY,0)) < 0)
return Con;
if ((ioctl(fd, VT_OPENQRY, &VTno) < 0) || (VTno == -1)) {
fprintf(stderr,"cannot get a vt\n");
return Con;
}
close(fd);
sprintf(VTname,"/dev/tty%i",VTno);
if ((fd = open(VTname, O_RDWR|O_NDELAY, 0)) < 0) {
fprintf(stderr,"cannot open console\n");
return Con;
}
if (ioctl(fd, VT_GETSTATE, &vts) == 0)
Con.vt = vts.v_active;
if (ioctl(fd, VT_ACTIVATE, VTno) != 0) {
fprintf(stderr,"cannot activate console\n");
close(fd);
return Con;
}
if (ioctl(fd, VT_WAITACTIVE, VTno) != 0) {
fprintf(stderr,"wait for active console failed\n");
close(fd);
return Con;
}
#if 0
if (ioctl(fd, KDSETMODE, KD_GRAPHICS) < 0) {
close(fd);
return Con;
}
#endif
Con.fd = fd;
return Con;
}
void
close_console(console Con)
{
if (Con.fd == -1)
return;
#if 0
ioctl(Con.fd, KDSETMODE, KD_TEXT);
#endif
if (Con.vt >=0)
ioctl(Con.fd, VT_ACTIVATE, Con.vt);
close(Con.fd);
}
|
