2 * Copyright 1999 Egbert Eich
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of the authors not be used in
9 * advertising or publicity pertaining to distribution of the software without
10 * specific, written prior permission. The authors makes no representations
11 * about the suitability of this software for any purpose. It is provided
12 * "as is" without express or implied warranty.
14 * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20 * PERFORMANCE OF THIS SOFTWARE.
22 #include <sys/ioctl.h>
37 console Con = {-1,-1};
43 if ((fd = open("/dev/tty0",O_WRONLY,0)) < 0)
46 if ((ioctl(fd, VT_OPENQRY, &VTno) < 0) || (VTno == -1)) {
47 fprintf(stderr,"cannot get a vt\n");
52 sprintf(VTname,"/dev/tty%i",VTno);
54 if ((fd = open(VTname, O_RDWR|O_NDELAY, 0)) < 0) {
55 fprintf(stderr,"cannot open console\n");
59 if (ioctl(fd, VT_GETSTATE, &vts) == 0)
60 Con.vt = vts.v_active;
62 if (ioctl(fd, VT_ACTIVATE, VTno) != 0) {
63 fprintf(stderr,"cannot activate console\n");
67 if (ioctl(fd, VT_WAITACTIVE, VTno) != 0) {
68 fprintf(stderr,"wait for active console failed\n");
73 if (ioctl(fd, KDSETMODE, KD_GRAPHICS) < 0) {
83 close_console(console Con)
89 ioctl(Con.fd, KDSETMODE, KD_TEXT);
92 ioctl(Con.fd, VT_ACTIVATE, Con.vt);