| 1 |
greg |
1.1 |
/* Copyright (c) 1987 Regents of the University of California */ |
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint |
| 4 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
|
|
#endif |
| 6 |
|
|
|
| 7 |
|
|
/* |
| 8 |
|
|
* tty.c - i/o for terminal drivers. |
| 9 |
|
|
* |
| 10 |
|
|
* 4/24/87 |
| 11 |
|
|
*/ |
| 12 |
|
|
|
| 13 |
|
|
#include <stdio.h> |
| 14 |
|
|
#include <signal.h> |
| 15 |
|
|
#include <fcntl.h> |
| 16 |
|
|
#include <sys/ioctl.h> |
| 17 |
|
|
|
| 18 |
|
|
#include "driver.h" |
| 19 |
|
|
|
| 20 |
|
|
/* |
| 21 |
|
|
* Drivers using these routines must call getch() |
| 22 |
|
|
* for input from stdin. |
| 23 |
|
|
*/ |
| 24 |
|
|
|
| 25 |
|
|
struct sgttyb ttymode; /* original tty modes */ |
| 26 |
|
|
|
| 27 |
|
|
int ttyfd; /* tty file descriptor */ |
| 28 |
|
|
|
| 29 |
|
|
struct driver *ttydev; /* tty device */ |
| 30 |
|
|
|
| 31 |
|
|
|
| 32 |
|
|
ttyset(dev, fd) /* set up raw tty device */ |
| 33 |
|
|
struct driver *dev; |
| 34 |
|
|
int fd; |
| 35 |
|
|
{ |
| 36 |
|
|
int ttyin(), newinp(); |
| 37 |
|
|
struct sgttyb flags; |
| 38 |
|
|
|
| 39 |
|
|
if (!isatty(fd)) |
| 40 |
|
|
return(-1); |
| 41 |
|
|
|
| 42 |
|
|
ttyfd = fd; |
| 43 |
|
|
ioctl(ttyfd, TIOCGETP, &ttymode); |
| 44 |
|
|
ioctl(ttyfd, TIOCGETP, &flags); |
| 45 |
|
|
flags.sg_flags |= RAW; /* also turns output */ |
| 46 |
|
|
flags.sg_flags &= ~ECHO; /* processing off */ |
| 47 |
|
|
ioctl(ttyfd, TIOCSETP, &flags); |
| 48 |
|
|
/* install input handler */ |
| 49 |
|
|
ttydev = dev; |
| 50 |
|
|
ttydev->comin = ttyin; |
| 51 |
|
|
ttydev->inpready = 0; |
| 52 |
|
|
signal(SIGIO, newinp); |
| 53 |
|
|
fcntl(ttyfd, F_SETFL, FASYNC); |
| 54 |
|
|
return(0); |
| 55 |
|
|
} |
| 56 |
|
|
|
| 57 |
|
|
|
| 58 |
|
|
ttydone() /* restore tty modes */ |
| 59 |
|
|
{ |
| 60 |
|
|
fcntl(ttyfd, F_SETFL, 0); |
| 61 |
|
|
signal(SIGIO, SIG_DFL); |
| 62 |
|
|
ioctl(ttyfd, TIOCSETP, &ttymode); |
| 63 |
|
|
ttydev->comin = NULL; |
| 64 |
|
|
ttydev->inpready = 0; |
| 65 |
|
|
ttydev = NULL; |
| 66 |
|
|
} |
| 67 |
|
|
|
| 68 |
|
|
|
| 69 |
|
|
int |
| 70 |
|
|
getch() /* get a character in raw mode */ |
| 71 |
|
|
{ |
| 72 |
|
|
register int c; |
| 73 |
|
|
|
| 74 |
|
|
fcntl(ttyfd, F_SETFL, 0); /* allow read to block */ |
| 75 |
|
|
if (ttydev->inpready > 0) |
| 76 |
|
|
ttydev->inpready--; |
| 77 |
|
|
c = getchar(); |
| 78 |
|
|
fcntl(ttyfd, F_SETFL, FASYNC); |
| 79 |
|
|
return(c); |
| 80 |
|
|
} |
| 81 |
|
|
|
| 82 |
|
|
|
| 83 |
|
|
static |
| 84 |
|
|
ttyin(buf) /* read a line in raw mode */ |
| 85 |
|
|
char *buf; |
| 86 |
|
|
{ |
| 87 |
|
|
int getch(); |
| 88 |
|
|
|
| 89 |
greg |
1.2 |
editline(buf, getch, ttydev->comout); |
| 90 |
greg |
1.1 |
} |
| 91 |
|
|
|
| 92 |
|
|
|
| 93 |
|
|
static |
| 94 |
|
|
newinp() /* new input */ |
| 95 |
|
|
{ |
| 96 |
|
|
ttydev->inpready++; |
| 97 |
|
|
} |
