Tcl Source Code

    else
	SC_TCL_GETHOSTBYNAME_R
	SC_TCL_GETHOSTBYADDR_R
    fi
fi

#---------------------------------------------------------------------------
#	Determine which interface to use to talk to the serial port.
#	Note that #include lines must begin in leftmost column for

#	some compilers to recognize them as preprocessor directives.



#---------------------------------------------------------------------------

SC_SERIAL_PORT



#--------------------------------------------------------------------
#	Include sys/select.h if it exists and if it supplies things
#	that appear to be useful and aren't already in sys/types.h.
#	This appears to be true only on the RS/6000 under AIX.  Some
#	systems like OSF/1 have a sys/select.h that's of no use, and
#	other systems like SCO UNIX have a sys/select.h that's

    AC_SUBST(MAKE_STUB_LIB)
    AC_SUBST(INSTALL_LIB)
    AC_SUBST(DLL_INSTALL_DIR)
    AC_SUBST(INSTALL_STUB_LIB)
    AC_SUBST(RANLIB)
])

#--------------------------------------------------------------------
# SC_SERIAL_PORT
#
#	Determine which interface to use to talk to the serial port.
#	Note that #include lines must begin in leftmost column for
#	some compilers to recognize them as preprocessor directives,
#	and some build environments have stdin not pointing at a
#	pseudo-terminal (usually /dev/null instead.)
#
# Arguments:
#	none
#
# Results:
#
#	Defines only one of the following vars:
#		HAVE_SYS_MODEM_H
#		USE_TERMIOS
#		USE_TERMIO
#		USE_SGTTY
#
#--------------------------------------------------------------------

AC_DEFUN([SC_SERIAL_PORT], [
    AC_CHECK_HEADERS(sys/modem.h)
    AC_CACHE_CHECK([termios vs. termio vs. sgtty], tcl_cv_api_serial, [
    AC_TRY_RUN([
#include <termios.h>

int main() {
    struct termios t;
    if (tcgetattr(0, &t) == 0) {
	cfsetospeed(&t, 0);
	t.c_cflag |= PARENB | PARODD | CSIZE | CSTOPB;
	return 0;
    }
    return 1;
}], tcl_cv_api_serial=termios, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
    if test $tcl_cv_api_serial = no ; then
	AC_TRY_RUN([
#include <termio.h>

int main() {
    struct termio t;
    if (ioctl(0, TCGETA, &t) == 0) {
	t.c_cflag |= CBAUD | PARENB | PARODD | CSIZE | CSTOPB;
	return 0;
    }
    return 1;
}], tcl_cv_api_serial=termio, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
    fi
    if test $tcl_cv_api_serial = no ; then
	AC_TRY_RUN([
#include <sgtty.h>

int main() {
    struct sgttyb t;
    if (ioctl(0, TIOCGETP, &t) == 0) {
	t.sg_ospeed = 0;
	t.sg_flags |= ODDP | EVENP | RAW;
	return 0;
    }
    return 1;
}], tcl_cv_api_serial=sgtty, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
    fi
    if test $tcl_cv_api_serial = no ; then
	AC_TRY_RUN([
#include <termios.h>
#include <errno.h>

int main() {
    struct termios t;
    if (tcgetattr(0, &t) == 0
	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
	cfsetospeed(&t, 0);
	t.c_cflag |= PARENB | PARODD | CSIZE | CSTOPB;
	return 0;
    }
    return 1;
}], tcl_cv_api_serial=termios, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
    fi
    if test $tcl_cv_api_serial = no; then
	AC_TRY_RUN([
#include <termio.h>
#include <errno.h>

int main() {
    struct termio t;
    if (ioctl(0, TCGETA, &t) == 0
	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
	t.c_cflag |= CBAUD | PARENB | PARODD | CSIZE | CSTOPB;
	return 0;
    }
    return 1;
    }], tcl_cv_api_serial=termio, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
    fi
    if test $tcl_cv_api_serial = no; then
	AC_TRY_RUN([
#include <sgtty.h>
#include <errno.h>

int main() {
    struct sgttyb t;
    if (ioctl(0, TIOCGETP, &t) == 0
	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
	t.sg_ospeed = 0;
	t.sg_flags |= ODDP | EVENP | RAW;
	return 0;
    }
    return 1;
}], tcl_cv_api_serial=sgtty, tcl_cv_api_serial=none, tcl_cv_api_serial=none)
    fi])
    case $tcl_cv_api_serial in
	termios) AC_DEFINE(USE_TERMIOS, 1, [Use the termios API for serial lines]);;
	termio)  AC_DEFINE(USE_TERMIO, 1, [Use the termio API for serial lines]);;
	sgtty)   AC_DEFINE(USE_SGTTY, 1, [Use the sgtty API for serial lines]);;
    esac
])

#--------------------------------------------------------------------
# SC_MISSING_POSIX_HEADERS
#
#	Supply substitutes for missing POSIX header files.  Special
#	notes:
#	    - stdlib.h doesn't define strtol, strtoul, or
#	      strtod insome versions of SunOS

/* Are we building with DTrace support? */
#undef USE_DTRACE

/* Should we use FIONBIO? */
#undef USE_FIONBIO

/* Use the sgtty API for serial lines */
#undef USE_SGTTY

/* Use the termio API for serial lines */
#undef USE_TERMIO

/* Use the termios API for serial lines */
#undef USE_TERMIOS

/* Do we want to use the threaded memory allocator? */
#undef USE_THREAD_ALLOC

/* Should we use vfork() instead of fork()? */
#undef USE_VFORK

/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most

 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tclInt.h"	/* Internal definitions for Tcl. */
#include "tclIO.h"	/* To get Channel type declaration. */

#define SUPPORTS_TTY

#undef DIRECT_BAUD
#ifdef B4800
#   if (B4800 == 4800)
#	define DIRECT_BAUD
#   endif /* B4800 == 4800 */
#endif /* B4800 */

#ifdef USE_TERMIOS
#   include <termios.h>
#   ifdef HAVE_SYS_IOCTL_H
#	include <sys/ioctl.h>
#   endif /* HAVE_SYS_IOCTL_H */
#   ifdef HAVE_SYS_MODEM_H
#	include <sys/modem.h>
#   endif /* HAVE_SYS_MODEM_H */
#   define IOSTATE			struct termios
#   define GETIOSTATE(fd, statePtr)	tcgetattr((fd), (statePtr))
#   define SETIOSTATE(fd, statePtr)	tcsetattr((fd), TCSADRAIN, (statePtr))
#   define GETCONTROL(fd, intPtr)	ioctl((fd), TIOCMGET, (intPtr))
#   define SETCONTROL(fd, intPtr)	ioctl((fd), TIOCMSET, (intPtr))

#   ifdef FIONREAD
#	define GETREADQUEUE(fd, int)	ioctl((fd), FIONREAD, &(int))
#   elif defined(FIORDCHK)
#	define GETREADQUEUE(fd, int)	int = ioctl((fd), FIORDCHK, NULL)


#   endif /* FIONREAD */

#   ifdef TIOCOUTQ
#	define GETWRITEQUEUE(fd, int)	ioctl((fd), TIOCOUTQ, &(int))
#   endif /* TIOCOUTQ */
#   if defined(TIOCSBRK) && defined(TIOCCBRK)

/*
 * Can't use ?: operator below because that messes up types on either Linux or
 * Solaris (the two are mutually exclusive!)
 */

#	define SETBREAK(fd, flag) \
		if (flag) {				\
		    ioctl((fd), TIOCSBRK, NULL);	\
		} else {				\
		    ioctl((fd), TIOCCBRK, NULL);	\
		}
#   endif /* TIOCSBRK&TIOCCBRK */
#   if !defined(CRTSCTS) && defined(CNEW_RTSCTS)
#	define CRTSCTS CNEW_RTSCTS
#   endif /* !CRTSCTS&CNEW_RTSCTS */
#   if !defined(PAREXT) && defined(CMSPAR)
#	define PAREXT CMSPAR
#   endif /* !PAREXT&&CMSPAR */
#else	/* !USE_TERMIOS */

#ifdef USE_TERMIO
#   include <termio.h>
#   define IOSTATE			struct termio
#   define GETIOSTATE(fd, statePtr)	ioctl((fd), TCGETA, (statePtr))
#   define SETIOSTATE(fd, statePtr)	ioctl((fd), TCSETAW, (statePtr))
#else	/* !USE_TERMIO */

#ifdef USE_SGTTY
#   include <sgtty.h>
#   define IOSTATE			struct sgttyb
#   define GETIOSTATE(fd, statePtr)	ioctl((fd), TIOCGETP, (statePtr))
#   define SETIOSTATE(fd, statePtr)	ioctl((fd), TIOCSETP, (statePtr))
#else	/* !USE_SGTTY */
#   undef SUPPORTS_TTY
#endif	/* !USE_SGTTY */

#endif	/* !USE_TERMIO */
#endif	/* !USE_TERMIOS */

/*
 * Helper macros to make parts of this file clearer. The macros do exactly
 * what they say on the tin. :-) They also only ever refer to their arguments
 * once, and so can be used without regard to side effects.
 */

    int validMask;		/* OR'ed combination of TCL_READABLE,
				 * TCL_WRITABLE, or TCL_EXCEPTION: indicates
				 * which operations are valid on the file. */
} FileState;

#ifdef SUPPORTS_TTY

/*
 * The following structure describes per-instance state of a tty-based
 * channel.
 */

typedef struct TtyState {
    FileState fs;		/* Per-instance state of the file descriptor.
				 * Must be the first field. */
    IOSTATE savedState;		/* Initial state of device. Used to reset
				 * state when device closed. */
} TtyState;

/*
 * The following structure is used to set or get the serial port attributes in
 * a platform-independant manner.
 */

typedef struct TtyAttrs {
    int baud;

			    Tcl_WideInt offset, int mode, int *errorCode);
static void		FileWatchProc(ClientData instanceData, int mask);
#ifdef SUPPORTS_TTY
static void		TtyGetAttributes(int fd, TtyAttrs *ttyPtr);
static int		TtyGetOptionProc(ClientData instanceData,
			    Tcl_Interp *interp, const char *optionName,
			    Tcl_DString *dsPtr);
#ifndef DIRECT_BAUD
static int		TtyGetBaud(unsigned long speed);
static unsigned long	TtyGetSpeed(int baud);
#endif /* DIRECT_BAUD */
static FileState *	TtyInit(int fd, int initialize);
static void		TtyModemStatusStr(int status, Tcl_DString *dsPtr);
static int		TtyParseMode(Tcl_Interp *interp, const char *mode,
			    int *speedPtr, int *parityPtr, int *dataPtr,
			    int *stopPtr);
static void		TtySetAttributes(int fd, TtyAttrs *ttyPtr);
static int		TtySetOptionProc(ClientData instanceData,
			    Tcl_Interp *interp, const char *optionName,
			    const char *value);
#endif	/* SUPPORTS_TTY */

/*

	*handlePtr = INT2PTR(fsPtr->fd);
	return TCL_OK;
    }
    return TCL_ERROR;
}

#ifdef SUPPORTS_TTY
#ifdef USE_TERMIOS
/*
 *----------------------------------------------------------------------
 *
 * TtyModemStatusStr --
 *
 *	Converts a RS232 modem status list of readable flags
 *

    Tcl_DStringAppendElement(dsPtr, (status & TIOCM_RNG) ? "1" : "0");
#endif /* TIOCM_RNG */
#ifdef TIOCM_CD
    Tcl_DStringAppendElement(dsPtr, "DCD");
    Tcl_DStringAppendElement(dsPtr, (status & TIOCM_CD) ? "1" : "0");
#endif /* TIOCM_CD */
}
#endif /* USE_TERMIOS */

/*
 *----------------------------------------------------------------------
 *
 * TtySetOptionProc --
 *
 *	Sets an option on a channel.

    Tcl_Interp *interp,		/* For error reporting - can be NULL. */
    const char *optionName,	/* Which option to set? */
    const char *value)		/* New value for option. */
{
    FileState *fsPtr = instanceData;
    unsigned int len, vlen;
    TtyAttrs tty;
#ifdef USE_TERMIOS
    int flag, control, argc;
    const char **argv;
    IOSTATE iostate;
#endif /* USE_TERMIOS */

    len = strlen(optionName);
    vlen = strlen(value);

    /*
     * Option -mode baud,parity,databits,stopbits
     */

    if ((len > 2) && (strncmp(optionName, "-mode", len) == 0)) {
	if (TtyParseMode(interp, value, &tty.baud, &tty.parity, &tty.data,
		&tty.stop) != TCL_OK) {
	    return TCL_ERROR;
	}

	/*
	 * system calls results should be checked there. - dl
	 */

	TtySetAttributes(fsPtr->fd, &tty);
	return TCL_OK;
    }

#ifdef USE_TERMIOS

    /*
     * Option -handshake none|xonxoff|rtscts|dtrdsr
     */

    if ((len > 1) && (strncmp(optionName, "-handshake", len) == 0)) {
	/*
	 * Reset all handshake options. DTR and RTS are ON by default.
	 */

	GETIOSTATE(fsPtr->fd, &iostate);
	CLEAR_BITS(iostate.c_iflag, IXON | IXOFF | IXANY);
#ifdef CRTSCTS
	CLEAR_BITS(iostate.c_cflag, CRTSCTS);
#endif /* CRTSCTS */
	if (strncasecmp(value, "NONE", vlen) == 0) {
	    /*
	     * Leave all handshake options disabled.
	     */
	} else if (strncasecmp(value, "XONXOFF", vlen) == 0) {
	    SET_BITS(iostate.c_iflag, IXON | IXOFF | IXANY);
	} else if (strncasecmp(value, "RTSCTS", vlen) == 0) {
#ifdef CRTSCTS
	    SET_BITS(iostate.c_cflag, CRTSCTS);
#else /* !CRTSTS */
	    UNSUPPORTED_OPTION("-handshake RTSCTS");
	    return TCL_ERROR;
#endif /* CRTSCTS */
	} else if (strncasecmp(value, "DTRDSR", vlen) == 0) {
	    UNSUPPORTED_OPTION("-handshake DTRDSR");
	    return TCL_ERROR;
	} else {
	    if (interp) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"bad value for -handshake: must be one of"
			" xonxoff, rtscts, dtrdsr or none", -1));
		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE",
			"VALUE", NULL);
	    }
	    return TCL_ERROR;
	}
	SETIOSTATE(fsPtr->fd, &iostate);
	return TCL_OK;
    }

    /*
     * Option -xchar {\x11 \x13}
     */

		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE",
			"VALUE", NULL);
	    }
	    ckfree(argv);
	    return TCL_ERROR;
	}

	GETIOSTATE(fsPtr->fd, &iostate);

	Tcl_UtfToExternalDString(NULL, argv[0], -1, &ds);
	iostate.c_cc[VSTART] = *(const cc_t *) Tcl_DStringValue(&ds);
	TclDStringClear(&ds);

	Tcl_UtfToExternalDString(NULL, argv[1], -1, &ds);
	iostate.c_cc[VSTOP] = *(const cc_t *) Tcl_DStringValue(&ds);
	Tcl_DStringFree(&ds);
	ckfree(argv);

	SETIOSTATE(fsPtr->fd, &iostate);
	return TCL_OK;
    }

    /*
     * Option -timeout msec
     */

    if ((len > 2) && (strncmp(optionName, "-timeout", len) == 0)) {
	int msec;

	GETIOSTATE(fsPtr->fd, &iostate);
	if (Tcl_GetInt(interp, value, &msec) != TCL_OK) {
	    return TCL_ERROR;
	}
	iostate.c_cc[VMIN] = 0;
	iostate.c_cc[VTIME] = (msec==0) ? 0 : (msec<100) ? 1 : (msec+50)/100;
	SETIOSTATE(fsPtr->fd, &iostate);
	return TCL_OK;
    }

    /*
     * Option -ttycontrol {DTR 1 RTS 0 BREAK 0}
     */

    if ((len > 4) && (strncmp(optionName, "-ttycontrol", len) == 0)) {

	int i;

	if (Tcl_SplitList(interp, value, &argc, &argv) == TCL_ERROR) {
	    return TCL_ERROR;
	}
	if ((argc % 2) == 1) {
	    if (interp) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"bad value for -ttycontrol: should be a list of"
			" signal,value pairs", -1));
		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE",
			"VALUE", NULL);
	    }
	    ckfree(argv);
	    return TCL_ERROR;
	}

	GETCONTROL(fsPtr->fd, &control);
	for (i = 0; i < argc-1; i += 2) {
	    if (Tcl_GetBoolean(interp, argv[i+1], &flag) == TCL_ERROR) {
		ckfree(argv);
		return TCL_ERROR;
	    }
	    if (strncasecmp(argv[i], "DTR", strlen(argv[i])) == 0) {
#ifdef TIOCM_DTR
		if (flag) {
		    SET_BITS(control, TIOCM_DTR);
		} else {
		    CLEAR_BITS(control, TIOCM_DTR);
		}
#else /* !TIOCM_DTR */
		UNSUPPORTED_OPTION("-ttycontrol DTR");
		ckfree(argv);
		return TCL_ERROR;
#endif /* TIOCM_DTR */
	    } else if (strncasecmp(argv[i], "RTS", strlen(argv[i])) == 0) {
#ifdef TIOCM_RTS
		if (flag) {
		    SET_BITS(control, TIOCM_RTS);
		} else {
		    CLEAR_BITS(control, TIOCM_RTS);
		}
#else /* !TIOCM_RTS*/
		UNSUPPORTED_OPTION("-ttycontrol RTS");
		ckfree(argv);
		return TCL_ERROR;
#endif /* TIOCM_RTS*/
	    } else if (strncasecmp(argv[i], "BREAK", strlen(argv[i])) == 0) {

#ifdef SETBREAK
		SETBREAK(fsPtr->fd, flag);
#else /* !SETBREAK */



		UNSUPPORTED_OPTION("-ttycontrol BREAK");
		ckfree(argv);
		return TCL_ERROR;
#endif /* SETBREAK */
	    } else {
		if (interp) {
		    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			    "bad signal \"%s\" for -ttycontrol: must be"
			    " DTR, RTS or BREAK", argv[i]));
		    Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE",
			"VALUE", NULL);
		}
		ckfree(argv);
		return TCL_ERROR;
	    }
	} /* -ttycontrol options loop */

	SETCONTROL(fsPtr->fd, &control);
	ckfree(argv);
	return TCL_OK;



    }

    return Tcl_BadChannelOption(interp, optionName,
	    "mode handshake timeout ttycontrol xchar");

#else /* !USE_TERMIOS */
    return Tcl_BadChannelOption(interp, optionName, "mode");
#endif /* USE_TERMIOS */
}

/*
 *----------------------------------------------------------------------
 *
 * TtyGetOptionProc --
 *
 *	Gets a mode associated with an IO channel. If the optionName arg is
 *	non-NULL, retrieves the value of that option. If the optionName arg is
 *	NULL, retrieves a list of alternating option names and values for the
 *	given channel.
 *
 * Results:
 *	A standard Tcl result. Also sets the supplied DString to the string
 *	value of the option(s) returned.
 *
 * Side effects:
 *	The string returned by this function is in static storage and may be
 *	reused at any time subsequent to the call. Sets error message if
 *	needed (by calling Tcl_BadChannelOption).
 *
 *----------------------------------------------------------------------
 */

static int
TtyGetOptionProc(
    ClientData instanceData,	/* File state. */

	valid = 1;
	TtyGetAttributes(fsPtr->fd, &tty);
	sprintf(buf, "%d,%c,%d,%d", tty.baud, tty.parity, tty.data, tty.stop);
	Tcl_DStringAppendElement(dsPtr, buf);
    }

#ifdef USE_TERMIOS
    /*
     * Get option -xchar
     */

    if (len == 0) {
	Tcl_DStringAppendElement(dsPtr, "-xchar");
	Tcl_DStringStartSublist(dsPtr);
    }
    if (len==0 || (len>1 && strncmp(optionName, "-xchar", len)==0)) {
	IOSTATE iostate;
	Tcl_DString ds;

	valid = 1;
	GETIOSTATE(fsPtr->fd, &iostate);
	Tcl_DStringInit(&ds);

	Tcl_ExternalToUtfDString(NULL, (char *) &iostate.c_cc[VSTART], 1, &ds);
	Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds));
	TclDStringClear(&ds);

	Tcl_ExternalToUtfDString(NULL, (char *) &iostate.c_cc[VSTOP], 1, &ds);

     * returned by unnamed [fconfigure chan].
     */

    if ((len > 1) && (strncmp(optionName, "-queue", len) == 0)) {
	int inQueue=0, outQueue=0, inBuffered, outBuffered;

	valid = 1;
#ifdef GETREADQUEUE
	GETREADQUEUE(fsPtr->fd, inQueue);
#endif /* GETREADQUEUE */
#ifdef GETWRITEQUEUE
	GETWRITEQUEUE(fsPtr->fd, outQueue);
#endif /* GETWRITEQUEUE */
	inBuffered = Tcl_InputBuffered(fsPtr->channel);
	outBuffered = Tcl_OutputBuffered(fsPtr->channel);

	sprintf(buf, "%d", inBuffered+inQueue);
	Tcl_DStringAppendElement(dsPtr, buf);
	sprintf(buf, "%d", outBuffered+outQueue);
	Tcl_DStringAppendElement(dsPtr, buf);
    }


    /*
     * Get option -ttystatus
     * Option is readonly and returned by [fconfigure chan -ttystatus] but not
     * returned by unnamed [fconfigure chan].
     */

    if ((len > 4) && (strncmp(optionName, "-ttystatus", len) == 0)) {
	int status;

	valid = 1;
	GETCONTROL(fsPtr->fd, &status);
	TtyModemStatusStr(status, dsPtr);
    }
#endif /* USE_TERMIOS */

    if (valid) {
	return TCL_OK;
    }
    return Tcl_BadChannelOption(interp, optionName, "mode"
#ifdef USE_TERMIOS
	    " queue ttystatus xchar"
#endif /* USE_TERMIOS */
	    );
}

#ifdef DIRECT_BAUD
#   define TtyGetSpeed(baud)	((unsigned) (baud))
#   define TtyGetBaud(speed)	((int) (speed))
#else /* !DIRECT_BAUD */

static const struct {int baud; unsigned long speed;} speeds[] = {
#ifdef B0
    {0, B0},
#endif
#ifdef B50
    {50, B50},
#endif
#ifdef B75

};

/*
 *---------------------------------------------------------------------------
 *
 * TtyGetSpeed --
 *
 *	Given a baud rate, get the mask value that should be stored in the
 *	termios, termio, or sgttyb structure in order to select that baud
 *	rate.
 *
 * Results:
 *	As above.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static unsigned long
TtyGetSpeed(
    int baud)			/* The baud rate to look up. */
{
    int bestIdx, bestDiff, i, diff;

    bestIdx = 0;
    bestDiff = 1000000;

}

/*
 *---------------------------------------------------------------------------
 *
 * TtyGetBaud --
 *
 *	Given a speed mask value from a termios, termio, or sgttyb structure,
 *	get the baus rate that corresponds to that mask value.
 *
 * Results:
 *	As above. If the mask value was not recognized, 0 is returned.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static int
TtyGetBaud(
    unsigned long speed)	/* Speed mask value to look up. */
{
    int i;

    for (i = 0; speeds[i].baud >= 0; i++) {
	if (speeds[i].speed == speed) {
	    return speeds[i].baud;
	}
    }
    return 0;
}
#endif /* !DIRECT_BAUD */

/*
 *---------------------------------------------------------------------------
 *
 * TtyGetAttributes --
 *
 *	Get the current attributes of the specified serial device.

static void
TtyGetAttributes(
    int fd,			/* Open file descriptor for serial port to be
				 * queried. */
    TtyAttrs *ttyPtr)		/* Buffer filled with serial port
				 * attributes. */
{
    IOSTATE iostate;
    int baud, parity, data, stop;

    GETIOSTATE(fd, &iostate);

#ifdef USE_TERMIOS
    baud = TtyGetBaud(cfgetospeed(&iostate));

    parity = 'n';
#ifdef PAREXT
    switch ((int) (iostate.c_cflag & (PARENB | PARODD | PAREXT))) {
    case PARENB			  : parity = 'e'; break;
    case PARENB | PARODD	  : parity = 'o'; break;

    }
#endif /* PAREXT */

    data = iostate.c_cflag & CSIZE;
    data = (data == CS5) ? 5 : (data == CS6) ? 6 : (data == CS7) ? 7 : 8;

    stop = (iostate.c_cflag & CSTOPB) ? 2 : 1;
#endif /* USE_TERMIOS */

#ifdef USE_TERMIO
    baud = TtyGetBaud(iostate.c_cflag & CBAUD);

    parity = 'n';
    switch (iostate.c_cflag & (PARENB | PARODD | PAREXT)) {
    case PARENB			  : parity = 'e'; break;
    case PARENB | PARODD	  : parity = 'o'; break;
    case PARENB |	   PAREXT : parity = 's'; break;
    case PARENB | PARODD | PAREXT : parity = 'm'; break;
    }

    data = iostate.c_cflag & CSIZE;
    data = (data == CS5) ? 5 : (data == CS6) ? 6 : (data == CS7) ? 7 : 8;

    stop = (iostate.c_cflag & CSTOPB) ? 2 : 1;
#endif /* USE_TERMIO */

#ifdef USE_SGTTY
    baud = TtyGetBaud(iostate.sg_ospeed);

    parity = 'n';
    if (iostate.sg_flags & EVENP) {
	parity = 'e';
    } else if (iostate.sg_flags & ODDP) {
	parity = 'o';
    }

    data = (iostate.sg_flags & (EVENP | ODDP)) ? 7 : 8;

    stop = 1;
#endif /* USE_SGTTY */

    ttyPtr->baud    = baud;
    ttyPtr->parity  = parity;
    ttyPtr->data    = data;
    ttyPtr->stop    = stop;
}


static void
TtySetAttributes(
    int fd,			/* Open file descriptor for serial port to be
				 * modified. */
    TtyAttrs *ttyPtr)		/* Buffer containing new attributes for serial
				 * port. */
{
    IOSTATE iostate;

#ifdef USE_TERMIOS
    int parity, data, flag;

    GETIOSTATE(fd, &iostate);
    cfsetospeed(&iostate, TtyGetSpeed(ttyPtr->baud));
    cfsetispeed(&iostate, TtyGetSpeed(ttyPtr->baud));

    flag = 0;
    parity = ttyPtr->parity;
    if (parity != 'n') {
	SET_BITS(flag, PARENB);

    if (ttyPtr->stop == 2) {
	SET_BITS(flag, CSTOPB);
    }

    CLEAR_BITS(iostate.c_cflag, PARENB | PARODD | CSIZE | CSTOPB);
    SET_BITS(iostate.c_cflag, flag);

#endif	/* USE_TERMIOS */

#ifdef USE_TERMIO
    int parity, data, flag;

    GETIOSTATE(fd, &iostate);
    CLEAR_BITS(iostate.c_cflag, CBAUD);
    SET_BITS(iostate.c_cflag, TtyGetSpeed(ttyPtr->baud));

    flag = 0;
    parity = ttyPtr->parity;
    if (parity != 'n') {
	SET_BITS(flag, PARENB);
	if ((parity == 'm') || (parity == 's')) {
	    SET_BITS(flag, PAREXT);
	}
	if ((parity == 'm') || (parity == 'o')) {
	    SET_BITS(flag, PARODD);
	}
    }
    data = ttyPtr->data;
    SET_BITS(flag,
	    (data == 5) ? CS5 :
	    (data == 6) ? CS6 :
	    (data == 7) ? CS7 : CS8);
    if (ttyPtr->stop == 2) {
	SET_BITS(flag, CSTOPB);
    }

    CLEAR_BITS(iostate.c_cflag, PARENB | PARODD | PAREXT | CSIZE | CSTOPB);
    SET_BITS(iostate.c_cflag, flag);

#endif	/* USE_TERMIO */

#ifdef USE_SGTTY
    int parity;

    GETIOSTATE(fd, &iostate);
    iostate.sg_ospeed = TtyGetSpeed(ttyPtr->baud);
    iostate.sg_ispeed = TtyGetSpeed(ttyPtr->baud);

    parity = ttyPtr->parity;
    if (parity == 'e') {
	CLEAR_BITS(iostate.sg_flags, ODDP);
	SET_BITS(iostate.sg_flags, EVENP);
    } else if (parity == 'o') {
	CLEAR_BITS(iostate.sg_flags, EVENP);
	SET_BITS(iostate.sg_flags, ODDP);
    }
#endif	/* USE_SGTTY */

    SETIOSTATE(fd, &iostate);
}

/*
 *---------------------------------------------------------------------------
 *
 * TtyParseMode --
 *
 *	Parse the "-mode" argument to the fconfigure command. The argument is
 *	of the form baud,parity,data,stop.
 *
 * Results:
 *	The return value is TCL_OK if the argument was successfully parsed,
 *	TCL_ERROR otherwise. If TCL_ERROR is returned, an error message is
 *	left in the interp's result (if interp is non-NULL).
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

static int
TtyParseMode(
    Tcl_Interp *interp,		/* If non-NULL, interp for error return. */
    const char *mode,		/* Mode string to be parsed. */
    int *speedPtr,		/* Filled with baud rate from mode string. */
    int *parityPtr,		/* Filled with parity from mode string. */
    int *dataPtr,		/* Filled with data bits from mode string. */
    int *stopPtr)		/* Filled with stop bits from mode string. */
{
    int i, end;
    char parity;
    static const char *bad = "bad value for -mode";

    i = sscanf(mode, "%d,%c,%d,%d%n", speedPtr, &parity, dataPtr,



	    stopPtr, &end);
    if ((i != 4) || (mode[end] != '\0')) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "%s: should be baud,parity,data,stop", bad));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL);
	}
	return TCL_ERROR;
    }

    /*
     * Only allow setting mark/space parity on platforms that support it Make
     * sure to allow for the case where strchr is a macro. [Bug: 5089]
     *
     * We cannot if/else/endif the strchr arguments, it has to be the whole
     * function. On AIX this function is apparently a macro, and macros do
     * not allow pre-processor directives in their arguments.
     */

    if (
#if defined(PAREXT) || defined(USE_TERMIO)
        strchr("noems", parity)
#else
        strchr("noe", parity)
#endif /* PAREXT|USE_TERMIO */
                               == NULL) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "%s parity: should be %s", bad,
#if defined(PAREXT) || defined(USE_TERMIO)
		    "n, o, e, m, or s"
#else
		    "n, o, or e"
#endif /* PAREXT|USE_TERMIO */
		    ));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL);
	}
	return TCL_ERROR;
    }
    *parityPtr = parity;
    if ((*dataPtr < 5) || (*dataPtr > 8)) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "%s data: should be 5, 6, 7, or 8", bad));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL);
	}
	return TCL_ERROR;
    }
    if ((*stopPtr < 0) || (*stopPtr > 2)) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "%s stop: should be 1 or 2", bad));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL);
	}
	return TCL_ERROR;
    }
    return TCL_OK;
}

/*
 *---------------------------------------------------------------------------
 *
 * TtyInit --
 *
 *	Given file descriptor that refers to a serial port, initialize the
 *	serial port to a set of sane values so that Tcl can talk to a device
 *	located on the serial port. Note that no initialization happens if the
 *	initialize flag is not set; this is necessary for the correct handling
 *	of UNIX console TTYs at startup.
 *
 * Results:
 *	A pointer to a FileState suitable for use with Tcl_CreateChannel and
 *	the ttyChannelType structure.
 *
 * Side effects:
 *	Serial device initialized to non-blocking raw mode, similar to sockets
 *	(if initialize flag is non-zero.) All other modes can be simulated on
 *	top of this in Tcl.
 *
 *---------------------------------------------------------------------------
 */

static FileState *
TtyInit(
    int fd,			/* Open file descriptor for serial port to be
				 * initialized. */
    int initialize)
{
    TtyState *ttyPtr = ckalloc(sizeof(TtyState));
    int stateUpdated = 0;

    GETIOSTATE(fd, &ttyPtr->savedState);
    if (initialize) {
	IOSTATE iostate = ttyPtr->savedState;

#if defined(USE_TERMIOS) || defined(USE_TERMIO)
	if (iostate.c_iflag != IGNBRK
		|| iostate.c_oflag != 0
		|| iostate.c_lflag != 0
		|| iostate.c_cflag & CREAD
		|| iostate.c_cc[VMIN] != 1
		|| iostate.c_cc[VTIME] != 0) {
	    stateUpdated = 1;
	}

	iostate.c_iflag = IGNBRK;
	iostate.c_oflag = 0;
	iostate.c_lflag = 0;
	SET_BITS(iostate.c_cflag, CREAD);
	iostate.c_cc[VMIN] = 1;
	iostate.c_cc[VTIME] = 0;
#endif	/* USE_TERMIOS|USE_TERMIO */

#ifdef USE_SGTTY
	if ((iostate.sg_flags & (EVENP | ODDP))
		|| !(iostate.sg_flags & RAW)) {
	    ttyPtr->stateUpdated = 1;
	}
	iostate.sg_flags &= EVENP | ODDP;
	SET_BITS(iostate.sg_flags, RAW);
#endif	/* USE_SGTTY */

	/*
	 * Only update if we're changing anything to avoid possible blocking.
	 */

	if (stateUpdated) {
	    SETIOSTATE(fd, &iostate);
	}
    }

    return &ttyPtr->fs;
}
#endif	/* SUPPORTS_TTY */

/*
 *----------------------------------------------------------------------
 *
 * TclpOpenFileChannel --

	 * interactively. Strictly a better check would be to see if the FD
	 * being set up is a device and has the same major/minor as the
	 * initial std FDs (beware reopening!) but that's nearly as messy.
	 */

	translation = "auto crlf";
	channelTypePtr = &ttyChannelType;
	fsPtr = TtyInit(fd, 1);
    } else
#endif	/* SUPPORTS_TTY */
    {
	translation = NULL;
	channelTypePtr = &fileChannelType;
	fsPtr = ckalloc(sizeof(FileState));
    }


    fsPtr->validMask = channelPermissions | TCL_EXCEPTION;
    fsPtr->fd = fd;

    fsPtr->channel = Tcl_CreateChannel(channelTypePtr, channelName,
	    fsPtr, channelPermissions);

    if (translation != NULL) {

	return NULL;
    }

    sockaddr.sa_family = AF_UNSPEC;

#ifdef SUPPORTS_TTY
    if (isatty(fd)) {
	fsPtr = TtyInit(fd, 0);
	channelTypePtr = &ttyChannelType;
	sprintf(channelName, "serial%d", fd);
    } else
#endif /* SUPPORTS_TTY */
    if ((getsockname(fd, (struct sockaddr *)&sockaddr, &sockaddrLen) == 0)
	&& (sockaddrLen > 0)
	&& (sockaddr.sa_family == AF_INET || sockaddr.sa_family == AF_INET6)) {
	return TclpMakeTcpClientChannelMode(INT2PTR(fd), mode);
    } else {
	channelTypePtr = &fileChannelType;
	fsPtr = ckalloc(sizeof(FileState));
	sprintf(channelName, "file%d", fd);
    }


    fsPtr->fd = fd;
    fsPtr->validMask = mode | TCL_EXCEPTION;
    fsPtr->channel = Tcl_CreateChannel(channelTypePtr, channelName,
	    fsPtr, mode);

    return fsPtr->channel;
}

#	if __DARWIN_UNIX03
#	    undef HAVE_PUTENV_THAT_COPIES
#	else
#	    define HAVE_PUTENV_THAT_COPIES	1
#	endif
#   endif /* __DARWIN_UNIX03 */

/*
 *---------------------------------------------------------------------------
 * The termios configure test program relies on the configure script being run
 * from a terminal, which is not the case e.g., when configuring from Xcode.
 * Since termios is known to be present on all Mac OS X releases since 10.0,
 * override the configure defines for serial API here. [Bug 497147]
 *---------------------------------------------------------------------------
 */

#   define USE_TERMIOS 1
#   undef USE_TERMIO
#   undef USE_SGTTY

/*
 *---------------------------------------------------------------------------
 * Include AvailabilityMacros.h here (when available) to ensure any symbolic
 * MAC_OS_X_VERSION_* constants passed on the command line are translated.
 *---------------------------------------------------------------------------
 */