136 lines
2.4 KiB
C
136 lines
2.4 KiB
C
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <linux/kd.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <sys/vt.h>
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#include <termios.h>
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#undef K_NUMLOCK
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#include "defs.h"
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#include "rc.h"
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#include "fb.h"
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#include "input.h"
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#define TTY_DEVICE "/dev/tty"
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static int kbfd = -1;
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static int initial_kbmode;
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static struct termios initial_term, term;
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#define SCAN_ALT 56
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#define SCAN_FBASE 58
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static int alt;
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static struct vt_mode vtm, initial_vtm;
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extern int keymap[][2];
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rcvar_t kb_exports[] =
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{
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RCV_END
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};
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static void vcrelease(int s)
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{
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signal(s, vcrelease);
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ioctl(kbfd, VT_RELDISP, VT_ACKACQ);
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}
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static void vcacquire(int s)
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{
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signal(s, vcacquire);
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ioctl(kbfd, VT_RELDISP, VT_ACKACQ);
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fb.enabled = 1;
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}
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void kb_init()
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{
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kbfd = open(TTY_DEVICE, O_RDWR);
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if (!kbfd) die("no controlling terminal\n");
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fcntl(kbfd, F_SETFL, O_NONBLOCK);
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if (ioctl(kbfd, KDSETMODE, KD_GRAPHICS) < 0)
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die("controlling terminal is not the graphics console\n");
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ioctl(kbfd, KDGKBMODE, &initial_kbmode);
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tcgetattr(kbfd, &initial_term);
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term = initial_term;
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term.c_lflag &= ~(ICANON | ECHO | ISIG);
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term.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON);
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term.c_cc[VMIN] = 0;
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term.c_cc[VTIME] = 0;
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tcsetattr(kbfd, TCSAFLUSH, &term);
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ioctl(kbfd, KDSKBMODE, K_MEDIUMRAW);
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ioctl(kbfd, VT_GETMODE, &initial_vtm);
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signal(SIGUSR1, vcrelease);
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signal(SIGUSR2, vcacquire);
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vtm = initial_vtm;
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vtm.mode = VT_PROCESS;
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vtm.relsig = SIGUSR1;
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vtm.acqsig = SIGUSR2;
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ioctl(kbfd, VT_SETMODE, &vtm);
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}
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void kb_close()
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{
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ioctl(kbfd, VT_SETMODE, &initial_vtm);
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ioctl(kbfd, KDSKBMODE, initial_kbmode);
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tcsetattr(kbfd, TCSAFLUSH, &initial_term);
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ioctl(kbfd, KDSETMODE, KD_TEXT);
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}
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static void vcswitch(int c)
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{
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struct vt_stat vts;
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ioctl(kbfd, VT_GETSTATE, &vts);
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if (c != vts.v_active)
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{
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ioctl(kbfd, VT_ACTIVATE, c);
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fb.enabled = 0;
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fb.dirty = 1;
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}
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}
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void kb_poll()
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{
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int i;
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event_t ev;
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byte k;
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int st;
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while (read(kbfd, &k, 1) > 0)
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{
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st = !(k & 0x80);
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k &= 0x7f;
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if (k == SCAN_ALT) alt = st;
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if (alt && k > SCAN_FBASE && k < SCAN_FBASE + 10)
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vcswitch(k - SCAN_FBASE);
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ev.type = st ? EV_PRESS : EV_RELEASE;
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for (i = 0; keymap[i][0]; i++)
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if (keymap[i][0] == k)
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break;
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if (!keymap[i][0]) continue;
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ev.code = keymap[i][1];
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ev_postevent(&ev);
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}
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}
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