/* * The functions in this file negotiate with the operating system for * characters, and write characters in a barely buffered fashion on the display. * All operating systems. * * $Header: /usr/build/vile/vile/RCS/termio.c,v 1.200 2005/07/11 22:44:41 tom Exp $ * */ #include "estruct.h" #include "edef.h" #include "nefunc.h" #if CC_DJGPP # include /* for kbhit() */ #endif #if SYS_VMS #include #include #endif #if SYS_UNIX static void ttmiscinit(void); /* there are three copies of the tt...() routines here -- one each for POSIX termios, traditional termio, and sgtty. If you have a choice, I recommend them in that order. */ /* ttopen() and ttclose() are responsible for putting the terminal in raw mode, setting up terminal signals, etc. ttclean() prepares the terminal for shell escapes, and ttunclean() gets us back into vile's mode */ /* I suppose this config stuff should move to estruct.h */ #if defined(HAVE_TERMIOS_H) && defined(HAVE_TCGETATTR) /* Note: is available on some systems, but in order to use it * a special library needs to be linked in. This is the case on the NeXT * where libposix.a needs to be linked in. Unfortunately libposix.a is buggy. * So we have the configuration script test to make sure that tcgetattr is * available through the standard set of libraries in order to help us * determine whether or not to use . */ # define USE_POSIX_TERMIOS 1 # define USE_FCNTL 1 #else # ifdef HAVE_TERMIO_H # define USE_TERMIO 1 # define USE_FCNTL 1 # else # ifdef HAVE_SGTTY_H # define USE_SGTTY 1 # define USE_FIONREAD 1 # else error "No termios or sgtty" # endif # endif #endif /* FIXME: There used to be code here which dealt with OSF1 not working right * with termios. We will have to determine if this is still the case and * add code here to deal with it if so. */ #if !defined(FIONREAD) /* try harder to get it */ # ifdef HAVE_SYS_FILIO_H # include "sys/filio.h" # else /* if you have trouble including ioctl.h, try "sys/ioctl.h" instead */ # ifdef HAVE_IOCTL_H # include # else # ifdef HAVE_SYS_IOCTL_H # include # endif # endif # endif #endif #if !defined(FIONREAD) && defined(HAVE_SYS_SOCKET_H) /* SCO OpenServer v5 */ # include #endif #if DISP_X11 /* don't use either one */ # undef USE_FCNTL # undef USE_FIONREAD #else # if defined(FIONREAD) /* there seems to be a bug in someone's implementation of fcntl -- it causes * output to be flushed if you change to ndelay input while output is * pending. (In some instances, the fcntl sets O_NDELAY on the output!). * * For these systems, we use FIONREAD instead, if possible. * In fact, try to use FIONREAD in any case if present. If you have * the problem with fcntl, you'll notice that the screen doesn't always * refresh correctly, as if the fcntl is interfering with the output drain. */ # undef USE_FCNTL # define USE_FIONREAD 1 # endif # if defined(HAVE_SELECT) && defined(HAVE_TYPE_FD_SET) /* Attempt to use the select call if possible to find out if input is * ready. This will allow us to use the file descriptor watching * facilities. */ # define USE_SELECT 1 # undef USE_FCNTL # undef USE_FIONREAD # else # if defined(HAVE_POLL) && defined(HAVE_POLL_H) # define USE_POLL 1 # endif # endif #endif #ifndef USE_FIONREAD #define USE_FIONREAD 0 #endif #ifndef USE_FCNTL #define USE_FCNTL 0 #endif #ifndef USE_POLL #define USE_POLL 0 #endif #ifndef USE_SELECT #define USE_SELECT 0 #endif #ifndef USE_SGTTY #define USE_SGTTY 0 #endif #ifndef USE_TERMIO #define USE_TERMIO 0 #endif #if USE_POLL #include #endif #ifndef O_NDELAY #undef USE_FCNTL #define USE_FCNTL 0 #endif #if USE_FCNTL #include static char kbd_char; /* one char of typeahead, gotten during poll */ static int kbd_char_good; /* is a char in kbd_char? */ /* * putting the input tty in polling mode lets us check for * user typeahead */ static void set_kbd_polling(int yes) { static int kbd_flags = -1; /* initial keyboard flags */ static int kbd_is_polled; /* are we in O_NDELAY mode? */ if (kbd_flags == -1) { kbd_flags = fcntl(0, F_GETFL, 0); if (kbd_flags == -1) imdying(SIGINT); kbd_is_polled = FALSE; } if (yes) { /* turn polling on -- put us in NDELAY mode */ if (!kbd_is_polled) { if (fcntl(0, F_SETFL, kbd_flags | O_NDELAY) < 0) imdying(SIGINT); } kbd_is_polled = TRUE; /* I think */ } else { /* turn polling off -- clear NDELAY mode */ if (kbd_is_polled) { if (fcntl(0, F_SETFL, kbd_flags) < 0) imdying(SIGINT); } kbd_is_polled = FALSE; } } #endif #define SMALL_STDOUT 1 #if defined(SMALL_STDOUT) && (defined (USE_FCNTL) || defined(USE_FIONREAD)) #define TBUFSIZ 128 /* Provide a smaller terminal output buffer so that the type-ahead detection works better (more often). That is, we overlap screen writing with more keyboard polling */ #else #define TBUFSIZ 1024 /* reduces the number of writes */ #endif #if USE_POSIX_TERMIOS #include #ifdef NEED_PTEM_H /* they neglected to define struct winsize in termios.h -- it's only in termio.h */ #include #include #endif #ifndef VDISABLE # ifdef _POSIX_VDISABLE # define VDISABLE _POSIX_VDISABLE # else # define VDISABLE '\0' # endif #endif static int saved_tty = FALSE; static struct termios otermios; #if !DISP_X11 static struct termios ntermios; static char tobuf[TBUFSIZ]; /* terminal output buffer */ #endif void vl_save_tty(void) { int s; s = tcgetattr(0, &otermios); if (s < 0) { perror("vl_save_tty tcgetattr"); ExitProgram(BADEXIT); } suspc = otermios.c_cc[VSUSP]; intrc = otermios.c_cc[VINTR]; killc = otermios.c_cc[VKILL]; startc = otermios.c_cc[VSTART]; stopc = otermios.c_cc[VSTOP]; backspc = otermios.c_cc[VERASE]; #ifdef VWERASE /* Sun has it. any others? */ wkillc = otermios.c_cc[VWERASE]; #else wkillc = tocntrl('W'); #endif saved_tty = TRUE; } void vl_restore_tty(void) { if (saved_tty) { tcdrain(1); tcsetattr(0, TCSADRAIN, &otermios); } } void ttopen(void) { vl_save_tty(); #if !DISP_X11 #ifdef HAVE_SETVBUF # ifdef SETVBUF_REVERSED setvbuf(stdout, _IOFBF, tobuf, TBUFSIZ); # else setvbuf(stdout, tobuf, _IOFBF, TBUFSIZ); # endif #else /* !HAVE_SETVBUF */ setbuffer(stdout, tobuf, TBUFSIZ); #endif /* !HAVE_SETVBUF */ #endif /* !DISP_X11 */ /* this could probably be done more POSIX'ish? */ #if OPT_SHELL && defined(SIGTSTP) && defined(SIGCONT) setup_handler(SIGTSTP, SIG_DFL); /* set signals so that we can */ setup_handler(SIGCONT, rtfrmshell); /* suspend & restart */ #endif #ifdef SIGTTOU setup_handler(SIGTTOU, SIG_IGN); /* ignore output prevention */ #endif #if ! DISP_X11 ntermios = otermios; /* new input settings: turn off crnl mapping, cr-ignoring, * case-conversion, and allow BREAK */ ntermios.c_iflag = BRKINT | (otermios.c_iflag & (ULONG) ~ (INLCR | IGNCR | ICRNL #ifdef IUCLC | IUCLC #endif )); ntermios.c_oflag = 0; ntermios.c_lflag = ISIG; ntermios.c_cc[VMIN] = 1; ntermios.c_cc[VTIME] = 0; #ifdef VSWTCH ntermios.c_cc[VSWTCH] = VDISABLE; #endif ntermios.c_cc[VSUSP] = VDISABLE; #if defined (VDSUSP) && defined(NCCS) && VDSUSP < NCCS ntermios.c_cc[VDSUSP] = VDISABLE; #endif ntermios.c_cc[VSTART] = VDISABLE; ntermios.c_cc[VSTOP] = VDISABLE; #endif /* ! DISP_X11 */ ttmiscinit(); ttunclean(); } /* we disable the flow control chars so we can use ^S as a command, but some folks still need it. they can put "flow-control-enable" in their .vilerc no argument: re-enable ^S/^Q processing in the driver with arg: disable it */ /* ARGSUSED */ int flow_control_enable(int f, int n GCC_UNUSED) { #if !DISP_X11 if (!f) { ntermios.c_cc[VSTART] = (char) startc; ntermios.c_cc[VSTOP] = (char) stopc; } else { ntermios.c_cc[VSTART] = VDISABLE; ntermios.c_cc[VSTOP] = VDISABLE; } ttunclean(); #endif return TRUE; } void ttclose(void) { ttclean(TRUE); } /* * Clean up in anticipation for a return to the * operating system. Move down to the last line and advance, to make room * for the system prompt. Shut down the channel to the * terminal. */ /*ARGSUSED*/ void ttclean(int f) { #if !DISP_X11 if (f) kbd_openup(); (void) fflush(stdout); vl_restore_tty(); term.flush(); term.close(); term.kclose(); #if USE_FCNTL set_kbd_polling(FALSE); #endif #endif } void ttunclean(void) { #if ! DISP_X11 tcdrain(1); tcsetattr(0, TCSADRAIN, &ntermios); #endif } #endif /* USE_POSIX_TERMIOS */ #if USE_TERMIO #include /* original terminal characteristics and characteristics to use inside */ struct termio otermio, ntermio; static int saved_tty = FALSE; #ifdef HAVE_SETBUFFER /* setbuffer() isn't on most termio systems */ char tobuf[TBUFSIZ]; /* terminal output buffer */ #endif void vl_save_tty(void) { ioctl(0, TCGETA, (char *) &otermio); /* save old settings */ intrc = otermio.c_cc[VINTR]; killc = otermio.c_cc[VKILL]; startc = tocntrl('Q'); stopc = tocntrl('S'); backspc = otermio.c_cc[VERASE]; wkillc = tocntrl('W'); #if SIGTSTP #ifdef V_SUSP suspc = otermio.c_cc[V_SUSP]; #else suspc = -1; #endif #else /* no SIGTSTP */ suspc = tocntrl('Z'); #endif saved_tty = TRUE; } void vl_restore_tty(void) { if (saved_tty) ioctl(0, TCSETAF, (char *) &otermio); } void ttopen(void) { vl_save_tty(); #if defined(HAVE_SETBUFFER) && !DISP_X11 setbuffer(stdout, tobuf, TBUFSIZ); #endif #if SIGTSTP /* be careful here -- VSUSP is sometimes out of the range of the c_cc array */ #ifdef V_SUSP ntermio.c_cc[V_SUSP] = -1; #endif #ifdef V_DSUSP ntermio.c_cc[V_DSUSP] = -1; #endif #if OPT_SHELL setup_handler(SIGTSTP, SIG_DFL); /* set signals so that we can */ setup_handler(SIGCONT, rtfrmshell); /* suspend & restart */ #endif setup_handler(SIGTTOU, SIG_IGN); /* ignore output prevention */ #endif #if ! DISP_X11 ntermio = otermio; /* setup new settings, allow BREAK */ ntermio.c_iflag = BRKINT; ntermio.c_oflag = 0; ntermio.c_lflag = ISIG; ntermio.c_cc[VMIN] = 1; ntermio.c_cc[VTIME] = 0; #ifdef VSWTCH ntermio.c_cc[VSWTCH] = -1; #endif #endif ttmiscinit(); ttunclean(); } /* we disable the flow control chars so we can use ^S as a command, but some folks still need it. they can put "flow-control-enable" in their .vilerc */ /* ARGSUSED */ int flow_control_enable(int f, int n) { #if !DISP_X11 ntermio.c_iflag &= ~(IXON | IXANY | IXOFF); if (!f) ntermio.c_iflag |= otermio.c_iflag & (IXON | IXANY | IXOFF); ttunclean(); #endif return TRUE; } void ttclose(void) { ttclean(TRUE); } void ttclean(int f) { #if ! DISP_X11 if (f) kbd_openup(); (void) fflush(stdout); term.flush(); term.close(); term.kclose(); /* xterm */ vl_restore_tty(); #if USE_FCNTL set_kbd_polling(FALSE); #endif #endif /* DISP_X11 */ } void ttunclean(void) { #if ! DISP_X11 ioctl(0, TCSETAW, (char *) &ntermio); #endif } #endif /* USE_TERMIO */ #if USE_SGTTY #if USE_FIONREAD char tobuf[TBUFSIZ]; /* terminal output buffer */ #endif #undef CTRL #include /* for stty/gtty functions */ static int saved_tty = FALSE; struct sgttyb ostate; /* saved tty state */ struct sgttyb nstate; /* values for editor mode */ struct sgttyb rnstate; /* values for raw editor mode */ int olstate; /* Saved local mode values */ int nlstate; /* new local mode values */ struct ltchars oltchars; /* Saved terminal special character set */ struct ltchars nltchars = {-1, -1, -1, -1, -1, -1}; /* a lot of nothing */ struct tchars otchars; /* Saved terminal special character set */ struct tchars ntchars; /* = { -1, -1, -1, -1, -1, -1 }; */ void vl_save_tty(void) { ioctl(0, TIOCGETP, (char *) &ostate); /* save old state */ killc = ostate.sg_kill; backspc = ostate.sg_erase; ioctl(0, TIOCGETC, (char *) &otchars); /* Save old characters */ intrc = otchars.t_intrc; startc = otchars.t_startc; stopc = otchars.t_stopc; ioctl(0, TIOCGLTC, (char *) &oltchars); /* Save old characters */ wkillc = oltchars.t_werasc; suspc = oltchars.t_suspc; #ifdef TIOCLGET ioctl(0, TIOCLGET, (char *) &olstate); #endif saved_tty = TRUE; } void vl_restore_tty(void) { if (saved_tty) { ioctl(0, TIOCSETN, (char *) &ostate); ioctl(0, TIOCSETC, (char *) &otchars); ioctl(0, TIOCSLTC, (char *) &oltchars); #ifdef TIOCLSET ioctl(0, TIOCLSET, (char *) &olstate); #endif } } void ttopen(void) { vl_save_tty(); #if ! DISP_X11 nstate = ostate; nstate.sg_flags |= CBREAK; nstate.sg_flags &= ~(ECHO | CRMOD); /* no echo for now... */ ioctl(0, TIOCSETN, (char *) &nstate); /* set new state */ #endif rnstate = nstate; rnstate.sg_flags &= ~CBREAK; rnstate.sg_flags |= RAW; #if ! DISP_X11 ntchars = otchars; ntchars.t_brkc = -1; ntchars.t_eofc = -1; ntchars.t_startc = -1; ntchars.t_stopc = -1; ioctl(0, TIOCSETC, (char *) &ntchars); /* Place new character into K */ ioctl(0, TIOCSLTC, (char *) &nltchars); /* Place new character into K */ #ifdef TIOCLGET nlstate = olstate; nlstate |= LLITOUT; ioctl(0, TIOCLSET, (char *) &nlstate); #endif #if OPT_SHELL setup_handler(SIGTSTP, SIG_DFL); /* set signals so that we can */ setup_handler(SIGCONT, rtfrmshell); /* suspend & restart */ #endif setup_handler(SIGTTOU, SIG_IGN); /* ignore output prevention */ #endif #if USE_FIONREAD setbuffer(stdout, tobuf, TBUFSIZ); #endif ttmiscinit(); } /* we disable the flow control chars so we can use ^S as a command, but some folks still need it. they can put "flow-control-enable" in their .vilerc */ /* ARGSUSED */ int flow_control_enable(int f, int n) { #if !DISP_X11 if (!f) { ntchars.t_startc = startc; ntchars.t_stopc = stopc; } else { ntchars.t_startc = -1; ntchars.t_stopc = -1; } ttunclean(); #endif return TRUE; } void ttclose(void) { ttclean(TRUE); } void ttclean(int f) { #if ! DISP_X11 if (f) kbd_openup(); term.flush(); term.close(); term.kclose(); /* xterm */ vl_restore_tty(); #endif } void ttunclean(void) { #if ! DISP_X11 ioctl(0, TIOCSETN, (char *) &nstate); ioctl(0, TIOCSETC, (char *) &ntchars); ioctl(0, TIOCSLTC, (char *) &nltchars); #ifdef TIOCLSET ioctl(0, TIOCLSET, (char *) &nlstate); #endif #endif /* !DISP_X11 */ } #endif /* USE_SGTTY */ #if !DISP_X11 OUTC_DCL ttputc(OUTC_ARGS) { OUTC_RET putchar((char) c); } void ttflush(void) { (void) fflush(stdout); } #if USE_SELECT static fd_set watchfd_read_fds; static fd_set watchfd_write_fds; static int watchfd_maxfd; #else #if USE_POLL static struct pollfd watch_fds[256]; static int watch_max; #else #ifdef __BEOS__ static UCHAR watch_fds[256]; static int watch_max; #endif /* __BEOS__ */ #endif /* USE_POLL */ #endif /* USE_SELECT */ int ttwatchfd(int fd, WATCHTYPE type, long *idp) { #if USE_SELECT *idp = (long) fd; if (fd > watchfd_maxfd) watchfd_maxfd = fd; if (type & WATCHREAD) FD_SET(fd, &watchfd_read_fds); if (type & WATCHWRITE) FD_SET(fd, &watchfd_write_fds); #else /* USE_SELECT */ #if USE_POLL int n; for (n = 0; n < watch_max; n++) { if (watch_fds[n].fd == fd) break; } if (n < (int) TABLESIZE(watch_fds) - 1) { *idp = (long) fd; if (n >= watch_max) watch_max = n + 1; watch_fds[n].fd = fd; if (type & WATCHREAD) watch_fds[n].events |= POLLIN; if (type & WATCHWRITE) watch_fds[n].events |= POLLOUT; } else { return FALSE; } #else #ifdef __BEOS__ if (fd < (int) sizeof(watch_fds)) { *idp = (long) fd; if (fd > watch_max) watch_max = fd; watch_fds[fd] |= type; } #endif /* __BEOS__ */ #endif /* USE_POLL */ #endif /* USE_SELECT */ return TRUE; } /* ARGSUSED */ void ttunwatchfd(int fd, long id GCC_UNUSED) { #if USE_SELECT FD_CLR(fd, &watchfd_read_fds); FD_CLR(fd, &watchfd_write_fds); while (watchfd_maxfd != 0 && !FD_ISSET(watchfd_maxfd - 1, &watchfd_read_fds) && !FD_ISSET(watchfd_maxfd - 1, &watchfd_write_fds)) watchfd_maxfd--; #else /* USE_SELECT */ #if USE_POLL int n; for (n = 0; n < watch_max; n++) { if (watch_fds[n].fd == fd) { watch_max--; while (n < watch_max) { watch_fds[n] = watch_fds[n + 1]; n++; } break; } } #else #ifdef __BEOS__ if (fd < (int) sizeof(watch_fds)) { watch_fds[fd] = 0; while (watch_max != 0 && watch_fds[watch_max - 1] == 0) { watch_max--; } } #endif /* __BEOS__ */ #endif /* USE_POLL */ #endif /* USE_SELECT */ } #ifdef VAL_AUTOCOLOR #define val_autocolor() global_b_val(VAL_AUTOCOLOR) #else #define val_autocolor() 0 #endif #if USE_SELECT || USE_POLL static int vl_getchar(void) { char c; int n; n = read(0, &c, 1); if (n <= 0) { if (n < 0 && errno == EINTR) return -1; imdying(SIGINT); } return char2int(c); } #endif /* * Read a character from the terminal, performing no editing and doing no echo * at all. */ int ttgetc(void) { #if USE_SELECT for_ever { fd_set read_fds; fd_set write_fds; fd_set except_fds; int fd, status; struct timeval tval; int acmilli = val_autocolor(); read_fds = watchfd_read_fds; write_fds = watchfd_write_fds; except_fds = watchfd_read_fds; tval.tv_sec = acmilli / 1000; tval.tv_usec = (acmilli % 1000) * 1000; FD_SET(0, &read_fds); /* add stdin to the set */ FD_SET(0, &except_fds); status = select(watchfd_maxfd + 1, &read_fds, &write_fds, &except_fds, acmilli > 0 ? &tval : NULL); if (status < 0) { /* Error */ if (errno == EINTR) continue; else return -1; } else if (status > 0) { /* process descriptors */ for (fd = watchfd_maxfd; fd > 0; fd--) { if (FD_ISSET(fd, &read_fds) || FD_ISSET(fd, &write_fds) || FD_ISSET(fd, &except_fds)) dowatchcallback(fd); } if (FD_ISSET(0, &read_fds) || FD_ISSET(0, &except_fds)) break; } else { /* Timeout */ autocolor(); } } return vl_getchar(); #else /* !USE_SELECT */ #if USE_POLL int acmilli = val_autocolor(); if (acmilli != 0 || watch_max != 0) { int n; for_ever { watch_fds[watch_max].fd = 0; watch_fds[watch_max].events = POLLIN; watch_fds[watch_max].revents = 0; if ((n = poll(watch_fds, watch_max + 1, acmilli)) > 0) { for (n = 0; n < watch_max; n++) { if (watch_fds[n].revents & (POLLIN | POLLOUT | POLLERR)) { dowatchcallback(watch_fds[n].fd); } } if (watch_fds[watch_max].revents & (POLLIN | POLLERR)) break; } else if (n == 0 && acmilli != 0) { autocolor(); if (watch_max == 0) break; /* revert to blocking input */ } } } return vl_getchar(); #else #if USE_FCNTL if (!kbd_char_good) { int n; set_kbd_polling(FALSE); n = read(0, &kbd_char, 1); if (n <= 0) { if (n < 0 && errno == EINTR) return -1; imdying(SIGINT); } } kbd_char_good = FALSE; return (kbd_char); #else /* USE_FCNTL */ #ifdef __BEOS__ int fd; int acmilli = val_autocolor(); for_ever { for (fd = 1; fd < watch_max; fd++) { if (((watch_fds[fd] & WATCHREAD) != 0 && beos_has_input(fd)) || ((watch_fds[fd] & WATCHWRITE) != 0 && beos_can_output(fd))) { dowatchcallback(fd); } } if (beos_has_input(0)) break; if (acmilli > 0) { beos_napms(5); if ((acmilli -= 5) <= 0) { autocolor(); } } } return getchar(); #else /* __BEOS__ */ int c; c = getchar(); if (c == EOF) { #ifdef linux /* * The command "^X!vile -V" makes vile receive an EOF at this * point. In fact, I've seen as many as 20,000 to 35,000 EOF's * in a row at this point, presumably while the processes are * fighting over /dev/tty. The corresponding errno is ESPIPE * (invalid seek). * * (tested with Linux 2.0.36 and 2.2.5-15) */ return -1; #else if (errno == EINTR) return -1; imdying(SIGINT); #endif } return c; #endif /* __BEOS__ */ #endif /* USE_FCNTL */ #endif /* USE_POLL */ #endif /* USE_SELECT */ } #endif /* !DISP_X11 */ /* tttypahead: Check to see if any characters are already in the keyboard buffer */ int tttypahead(void) { #if DISP_X11 return x_typahead(0); #else # if USE_SELECT || USE_POLL || defined(__BEOS__) /* use the watchinput part of catnap if it's useful */ return catnap(0, TRUE); # else # if USE_FIONREAD { long x; return ((ioctl(0, FIONREAD, (caddr_t) & x) < 0) ? 0 : (int) x); } # else # if USE_FCNTL if (!kbd_char_good) { set_kbd_polling(TRUE); if (read(0, &kbd_char, 1) == 1) kbd_char_good = TRUE; } return (kbd_char_good); # else /* otherwise give up */ return FALSE; # endif /* USE_FCNTL */ # endif /* USE_FIONREAD */ # endif /* using catnap */ #endif /* DISP_X11 */ } /* this takes care of some stuff that's common across all ttopen's. Some of it should arguably be somewhere else, but... */ static void ttmiscinit(void) { /* make sure backspace is bound to backspace */ asciitbl[backspc] = &f_backchar_to_bol; #if !DISP_X11 /* no buffering on input */ setbuf(stdin, (char *) 0); #endif } #else /* not SYS_UNIX */ #if SYS_MSDOS || SYS_OS2 || SYS_WINNT # if CC_DJGPP # include # else # if CC_NEWDOSCC # include # endif # endif #endif #if SYS_VMS #include #include #include #include #include #include typedef struct { USHORT status; /* I/O completion status */ USHORT count; /* byte transfer count */ int dev_dep_data; /* device-dependent data */ } QIO_SB; /* This is a QIO I/O Status Block */ #define NIBUF 1024 /* Input buffer size */ #define NOBUF 1024 /* MM says big buffers win! */ #define EFN 0 /* Event flag */ char obuf[NOBUF]; /* Output buffer */ int nobuf; /* # of bytes in above */ char ibuf[NIBUF]; /* Input buffer */ int nibuf; /* # of bytes in above */ int ibufi; /* Read index */ int oldmode[3]; /* Old TTY mode bits */ int newmode[3]; /* New TTY mode bits */ short iochan; /* TTY I/O channel */ #endif void ttopen(void) { #if SYS_VMS QIO_SB iosb; int status; $DESCRIPTOR(odsc, "SYS$COMMAND"); status = sys$assign(&odsc, &iochan, 0, 0); if (status != SS$_NORMAL) tidy_exit(status); status = sys$qiow(EFN, iochan, IO$_SENSEMODE, &iosb, 0, 0, oldmode, sizeof(oldmode), 0, 0, 0, 0); if (status != SS$_NORMAL || iosb.status != SS$_NORMAL) tidy_exit(status); newmode[0] = oldmode[0]; newmode[1] = oldmode[1]; newmode[1] |= TT$M_NOBRDCST; /* turn on no-broadcast */ newmode[1] &= ~TT$M_TTSYNC; newmode[1] &= ~TT$M_ESCAPE; /* turn off escape-processing */ newmode[1] &= ~TT$M_HOSTSYNC; newmode[1] &= ~TT$M_NOTYPEAHD; /* turn off no-typeahead */ newmode[2] = oldmode[2]; newmode[2] |= TT2$M_PASTHRU; /* turn on pass-through */ newmode[2] |= TT2$M_ALTYPEAHD; /* turn on big typeahead buffer */ status = sys$qiow(EFN, iochan, IO$_SETMODE, &iosb, 0, 0, newmode, sizeof(newmode), 0, 0, 0, 0); if (status != SS$_NORMAL || iosb.status != SS$_NORMAL) tidy_exit(status); term.rows = (newmode[1] >> 24); term.cols = newmode[0] >> 16; #endif /* make sure backspace is bound to backspace */ asciitbl[backspc] = &f_backchar_to_bol; } void ttclose(void) { #if SYS_VMS /* * Note: this code used to check for errors when closing the output, * but it didn't work properly (left the screen set in 1-line mode) * when I was running as system manager, so I took out the error * checking -- T.Dickey 94/7/15. */ int status; QIO_SB iosb; ttflush(); status = sys$qiow(EFN, iochan, IO$_SETMODE, &iosb, 0, 0, oldmode, sizeof(oldmode), 0, 0, 0, 0); if (status == SS$_IVCHAN) return; /* already closed it */ (void) sys$dassgn(iochan); #endif #if !SYS_VMS ttclean(TRUE); #endif } void ttclean(int f) { #if !DISP_X11 if (f) kbd_openup(); term.flush(); term.close(); term.kclose(); #endif } void ttunclean(void) { } /* * Write a character to the display. On VMS, terminal output is buffered, and * we just put the characters in the big array, after checking for overflow. * On CPM terminal I/O unbuffered, so we just write the byte out. Ditto on * MS-DOS (use the very very raw console output routine). */ OUTC_DCL ttputc(OUTC_ARGS) { #if SYS_VMS if (nobuf >= NOBUF) ttflush(); obuf[nobuf++] = c; OUTC_RET c; #endif #if SYS_OS2 && !DISP_VIO OUTC_RET putch(c); #endif #if SYS_MSDOS # if DISP_IBMPC /* unneeded currently -- output is memory-mapped */ # endif # if DISP_ANSI OUTC_RET putchar(c); # endif #endif } /* * Flush terminal buffer. Does real work where the terminal output is buffered * up. A no-operation on systems where byte at a time terminal I/O is done. */ void ttflush(void) { #if SYS_VMS QIO_SB iosb; if (nobuf != 0) { (void) sys$qiow(EFN, iochan, IO$_WRITELBLK | IO$M_NOFORMAT, &iosb, 0, 0, obuf, nobuf, 0, 0, 0, 0); nobuf = 0; } #endif #if SYS_MSDOS # if DISP_ANSI fflush(stdout); # endif #endif } #if SYS_VMS static void read_vms_tty(int length) { int status; QIO_SB iosb; int term[2] = {0, 0}; unsigned mask = (IO$_READVBLK | IO$M_NOECHO | IO$M_NOFILTR | IO$M_TRMNOECHO); status = sys$qiow(EFN, iochan, ((length == 1) ? mask : mask | IO$M_TIMED), &iosb, 0, 0, ibuf, length, 0, term, 0, 0); if (status != SS$_NORMAL) tidy_exit(status); if (iosb.status == SS$_ENDOFFILE) tidy_exit(status); nibuf = iosb.count; ibufi = 0; } #endif /* * Read a character from the terminal, performing no editing and doing no echo * at all. More complex in VMS that almost anyplace else, which figures. Very * simple on CPM, because the system can do exactly what you want. * This should be a terminal dispatch function. */ int ttgetc(void) { #if SYS_VMS while (ibufi >= nibuf) { if (!tttypahead()) read_vms_tty(1); } return (ibuf[ibufi++] & 0xFF); /* Allow multinational */ #else #if SYS_MSDOS || SYS_OS2 /* * If we've got a mouse, poll waiting for mouse movement and mouse * clicks until we've got a character to return. */ # if OPT_MS_MOUSE if (ms_exists()) { for_ever { if (tttypahead()) break; ms_processing(); } } # endif /* OPT_MS_MOUSE */ #if CC_MSC || CC_TURBO || SYS_OS2 return getch(); #endif #if CC_NEWDOSCC && !(CC_MSC||CC_TURBO||SYS_OS2||SYS_WINNT) { int c; union REGS rg; /* cpu registers for DOS calls */ static int nxtchar = -1; /* if a char already is ready, return it */ if (nxtchar >= 0) { c = nxtchar; nxtchar = -1; return (c); } /* call the dos to get a char */ rg.h.ah = 7; /* dos Direct Console Input call */ intdos(&rg, &rg); c = rg.h.al; /* grab the char */ return (c & 0xff); } #endif #else /* ! (SYS_MSDOS || SYS_OS2) */ /* Not used. */ return 0; #endif #endif } /* tttypahead: See if the user has more characters waiting in the keyboard buffer */ #if ! SYS_WINNT int tttypahead(void) { #if DISP_X11 return x_typahead(0); #endif #if DISP_VMSVT if (ibufi >= nibuf) { read_vms_tty(NIBUF); return (nibuf > 0); } return TRUE; #endif #if SYS_MSDOS || SYS_OS2 return (kbhit() != 0); #endif } #endif #endif /* not SYS_UNIX */ /* Get terminal size from system, first trying the driver, and then * the environment. Store number of lines into *heightp and width * into *widthp. If zero or a negative number is stored, the value * is not valid. This may be fixed (in the tcap.c case) by the TERM * variable. */ #if ! DISP_X11 void getscreensize(int *widthp, int *heightp) { char *e; #ifdef TIOCGWINSZ struct winsize size; #endif *widthp = 0; *heightp = 0; #ifdef TIOCGWINSZ if (ioctl(0, TIOCGWINSZ, (caddr_t) & size) == 0) { if ((int) (size.ws_row) > 0) *heightp = size.ws_row; if ((int) (size.ws_col) > 0) *widthp = size.ws_col; } if (*widthp <= 0) { e = getenv("COLUMNS"); if (e) *widthp = atoi(e); } if (*heightp <= 0) { e = getenv("LINES"); if (e) *heightp = atoi(e); } #else e = getenv("COLUMNS"); if (e) *widthp = atoi(e); e = getenv("LINES"); if (e) *heightp = atoi(e); #endif } #endif /******************************************************************************/ /* * Define an empty terminal type for machines where we cannot use 'dumb_term', * so that command-line prompting will have something to talk to. */ static void nullterm_open(void) { } static void nullterm_close(void) { } static int nullterm_getch(void) { return esc_c; } /*ARGSUSED*/ static OUTC_DCL nullterm_putch(OUTC_ARGS) { OUTC_RET c; } static int nullterm_typahead(void) { return FALSE; } static void nullterm_flush(void) { } /*ARGSUSED*/ static void nullterm_curmove(int row GCC_UNUSED, int col GCC_UNUSED) { } static void nullterm_eeol(void) { } static void nullterm_eeop(void) { } static void nullterm_beep(void) { } /*ARGSUSED*/ static void nullterm_rev(UINT state GCC_UNUSED) { } #if OPT_COLOR #define NO_COLOR(name,value) name = value; #else #define NO_COLOR(name,value) /*nothing */ #endif /* * These are public, since we'll use them as placeholders for unimplemented * device methods. */ /*ARGSUSED*/ int nullterm_setdescrip(const char *res GCC_UNUSED) { return (FALSE); } /*ARGSUSED*/ int nullterm_watchfd(int fd GCC_UNUSED, WATCHTYPE type GCC_UNUSED, long *idp GCC_UNUSED) { return 0; } /*ARGSUSED*/ void nullterm_cursorvis(int flag GCC_UNUSED) { } /*ARGSUSED*/ void nullterm_icursor(int c GCC_UNUSED) { } /*ARGSUSED*/ void nullterm_kclose(void) { } /*ARGSUSED*/ void nullterm_kopen(void) { } /*ARGSUSED*/ void nullterm_pflush(void) { } /*ARGSUSED*/ void nullterm_scroll(int f GCC_UNUSED, int t GCC_UNUSED, int n GCC_UNUSED) { } /*ARGSUSED*/ void nullterm_setback(int b GCC_UNUSED) { NO_COLOR(gbcolor, C_BLACK) } /*ARGSUSED*/ void nullterm_setccol(int c GCC_UNUSED) { NO_COLOR(gccolor, ENUM_UNKNOWN) } /*ARGSUSED*/ void nullterm_setfore(int f GCC_UNUSED) { NO_COLOR(gbcolor, C_WHITE) } /*ARGSUSED*/ void nullterm_setpal(const char *p GCC_UNUSED) { } /*ARGSUSED*/ void nullterm_settitle(const char *t GCC_UNUSED) { } /*ARGSUSED*/ void nullterm_unwatchfd(int fd GCC_UNUSED, long id GCC_UNUSED) { } TERM null_term = { 1, 1, 80, 80, 0, /* NPAUSE */ nullterm_open, nullterm_close, nullterm_kopen, nullterm_kclose, nullterm_getch, nullterm_putch, nullterm_typahead, nullterm_flush, nullterm_curmove, nullterm_eeol, nullterm_eeop, nullterm_beep, nullterm_rev, nullterm_setdescrip, nullterm_setfore, nullterm_setback, nullterm_setpal, nullterm_setccol, nullterm_scroll, nullterm_pflush, nullterm_icursor, nullterm_settitle, nullterm_watchfd, nullterm_unwatchfd, nullterm_cursorvis, }; /******************************************************************************/ /* * This function is used during terminal initialization to allow us to setup * either a dumb or null terminal driver to handle stray command-line and other * debris, then (in the second call), open the screen driver. */ int open_terminal(TERM * termp) { static TERM save_term; static int initialized; if (!initialized++) { /* * If the open and/or close slots are empty, fill them in with * the screen driver's functions. */ if (termp->open == 0) termp->open = term.open; if (termp->close == 0) termp->close = term.close; /* * If the command-line driver is the same as the screen driver, * then all we're really doing is opening the terminal in raw * mode (e.g., the termcap driver), but with restrictions on * cursor movement, etc. We do a bit of juggling, because the * screen driver typically sets entries (such as the screen * size) in the 'term' struct. */ if (term.open == termp->open) { term.open(); save_term = term; term = *termp; } else { save_term = term; term = *termp; term.open(); } } else { /* * If the command-line driver isn't the same as the screen * driver, reopen the terminal with the screen driver. */ if (save_term.open != term.open) { term.close(); term = save_term; term.open(); } else { term = save_term; } } return TRUE; }