117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/* To do:
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* - Replace explicit 8/24 splits with macros.
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* - We need to pass the control-chars vecs in as Scheme
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* strings, and test the length before doing the memcpy.
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*/
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/*
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* Scheme48/scsh terminal control interface.
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* Routines that require custom C support.
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* Copyright (c) 1995 by Brian D. Carlstrom
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* Re-written by Olin.
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*/
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#include <unistd.h>
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#include <stdio.h> /* ctermid decl */
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#include <termios.h>
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#include <string.h>
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#include <sys/types.h>
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/* This #include is for the #ifdef'd code in open_ctty() below, and
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** is therefor ifdef'd identically.
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*/
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#if defined(TIOCSCTTY) && !defined(CIBAUD)
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#include <sys/ioctl.h>
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#endif
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#include "tty1.h" /* Make sure the .h interface agrees with the code. */
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extern int errno;
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/*****************************************************************************/
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int scheme_tcgetattr(int fd, char *control_chars,
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int *iflag_hi8, int *iflag_lo24,
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int *oflag_hi8, int *oflag_lo24,
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int *cflag_hi8, int *cflag_lo24,
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int *lflag_hi8, int *lflag_lo24,
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int *ispeed, int *ospeed)
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{
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struct termios t;
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int result = tcgetattr(fd, &t);
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if (result != -1) {
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memcpy(control_chars, t.c_cc, NCCS);
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*iflag_hi8 =t.c_iflag >> 24; *iflag_lo24=t.c_iflag & 0xffffff;
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*oflag_hi8 =t.c_oflag >> 24; *oflag_lo24=t.c_oflag & 0xffffff;
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*cflag_hi8 =t.c_cflag >> 24; *cflag_lo24=t.c_cflag & 0xffffff;
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*lflag_hi8 =t.c_lflag >> 24; *lflag_lo24=t.c_lflag & 0xffffff;
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*ispeed=cfgetispeed(&t);
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*ospeed=cfgetospeed(&t);
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}
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return result;
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}
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/*****************************************************************************/
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int scheme_tcsetattr(int fd, int option,
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const char *control_chars,
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int iflag_hi8, int iflag_lo24,
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int oflag_hi8, int oflag_lo24,
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int cflag_hi8, int cflag_lo24,
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int lflag_hi8, int lflag_lo24,
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int ispeed, int ospeed,
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int min, int time)
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{
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struct termios t;
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memcpy(t.c_cc, control_chars, NCCS);
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/* This first clause of this conditional test will hopefully
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** resolve the branch at compile time. However, since VMIN/VEOF
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** and VTIME/VEOL are allowed by POSIX to colllide, we have to check.
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** If they do collide, we set EOF & EOL in canonical mode, and MIN & TIME
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** in raw mode. Ah, Unix.
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*/
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if( (VMIN != VEOF && VTIME != VEOL) || !(t.c_lflag & ICANON) ) {
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t.c_cc[VMIN] = min;
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t.c_cc[VTIME] = time;
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}
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t.c_iflag = (iflag_hi8 << 24) | iflag_lo24;
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t.c_oflag = (oflag_hi8 << 24) | oflag_lo24;
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t.c_cflag = (cflag_hi8 << 24) | cflag_lo24;
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t.c_lflag = (lflag_hi8 << 24) | lflag_lo24;
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cfsetispeed(&t, ispeed);
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cfsetospeed(&t, ospeed);
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return tcsetattr(fd, option, &t);
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}
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/*****************************************************************************/
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int open_ctty(const char *ttyname, int flags)
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{
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int fd = open(ttyname, flags);
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#if defined(TIOCSCTTY) && !defined(CIBAUD) && !defined(__hpux)
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/* 4.3+BSD way to acquire control tty. !CIBAUD rules out SunOS.
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** This code stolen from Steven's *Advanced Prog. in the Unix Env.*
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*/
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if( (fd >= 0) && (ioctl(fd, TIOCSCTTY, (char *) 0) < 0) ) {
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int e = errno;
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close(fd);
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errno = e;
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return -1;
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}
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#endif
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return fd;
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}
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char *scm_ctermid() { return ctermid(0); }
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