147 lines
2.4 KiB
C
147 lines
2.4 KiB
C
#include <stdio.h>
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#include <signal.h>
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#ifndef TERMIOS_H
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#include <sgtty.h>
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#else /* TERMIOS_H */
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#include <termios.h>
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#endif /* TERMIOS_H */
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#include <setjmp.h>
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#include "../util/masks.h"
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#include "protocol.h"
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#include "globals.h"
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void cleanup();
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void timedout();
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int tgetc();
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void tputc();
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static jmp_buf timobuf;
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#ifndef TERMIOS_H
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static struct sgttyb otty, ntty;
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#else /* TERMIOS_H */
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static struct termios otty, ntty;
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#endif /* TERMIOS_H */
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static int ttyfd;
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static int signal_set;
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void setup_tty()
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{
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ttyfd = fileno(stderr);
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if(!signal_set) {
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(void)signal(SIGHUP, cleanup);
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(void)signal(SIGINT, cleanup);
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(void)signal(SIGQUIT, cleanup);
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(void)signal(SIGTERM, cleanup);
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if(time_out) {
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(void)signal(SIGALRM, timedout);
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}
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signal_set = 1;
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}
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#ifndef TERMIOS_H
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(void)ioctl(ttyfd, TIOCGETP, &otty);
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ntty = otty;
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ntty.sg_flags = RAW | ANYP;
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(void)ioctl(ttyfd, TIOCSETP, &ntty);
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#else /* TERMIOS_H */
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(void)tcgetattr(ttyfd, &otty);
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ntty = otty;
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ntty.c_lflag &= ~(ICANON | ISIG | ECHO);
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ntty.c_iflag &= IXOFF;
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ntty.c_oflag &= ~(OPOST);
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ntty.c_cflag &= ~(PARENB | PARODD);
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ntty.c_cc[VMIN] = 1;
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ntty.c_cc[VTIME] = 0;
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(void)tcsetattr(ttyfd, TCSAFLUSH, &ntty);
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#endif /* TERMIOS_H */
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}
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void reset_tty()
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{
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(void)sleep(1); /* Wait for output to drain */
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#ifndef TERMIOS_H
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(void)ioctl(ttyfd, TIOCSETP, &otty);
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#else /* TERMIOS_H */
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(void)tcsetattr(ttyfd, TCSAFLUSH, &otty);
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#endif /* TERMIOS_H */
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}
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void cleanup(sig) int sig;
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{
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reset_tty();
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exit(sig);
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}
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void timedout()
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{
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(void)signal(SIGALRM, timedout);
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longjmp(timobuf, 1);
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}
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int tgetc(timeout)
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int timeout;
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{
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char c;
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int i;
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if(time_out) {
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if(setjmp(timobuf)) {
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return TMO;
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}
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(void)alarm(timeout);
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}
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i = read(ttyfd, &c, 1);
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if(time_out) {
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(void)alarm(0);
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}
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if(i == 0) {
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return EOT;
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} else {
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return c & BYTEMASK;
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}
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}
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tgetrec(buf, count, timeout)
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char *buf;
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int count, timeout;
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{
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int i, tot = 0, cc = count;
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if(time_out) {
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if(setjmp(timobuf)) {
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return TMO;
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}
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(void)alarm(timeout);
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}
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while(tot < count) {
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i = read(ttyfd, buf, cc);
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if(i < 0) {
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continue;
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}
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tot += i;
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cc -= i;
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buf += i;
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}
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if(time_out) {
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(void)alarm(0);
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}
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return 0;
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}
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void tputc(c)
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int c;
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{
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char cc;
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cc = c & BYTEMASK;
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(void)write(ttyfd, &cc, 1);
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}
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void tputrec(buf, count)
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char *buf;
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int count;
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{
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(void)write(ttyfd, buf, count);
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}
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