home *** CD-ROM | disk | FTP | other *** search
- /*
- * tclUnixChan.c
- *
- * Common channel driver for Unix channels based on files, command
- * pipes and TCP sockets.
- *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * SCCS: @(#) tclUnixChan.c 1.203 97/06/20 13:03:18
- */
-
- #include "tclInt.h" /* Internal definitions for Tcl. */
- #include "tclPort.h" /* Portability features for Tcl. */
-
- /*
- * sys/ioctl.h has already been included by tclPort.h. Including termios.h
- * or termio.h causes a bunch of warning messages because some duplicate
- * (but not contradictory) #defines exist in termios.h and/or termio.h
- */
- #undef NL0
- #undef NL1
- #undef CR0
- #undef CR1
- #undef CR2
- #undef CR3
- #undef TAB0
- #undef TAB1
- #undef TAB2
- #undef XTABS
- #undef BS0
- #undef BS1
- #undef FF0
- #undef FF1
- #undef ECHO
- #undef NOFLSH
- #undef TOSTOP
- #undef FLUSHO
- #undef PENDIN
-
- #ifdef USE_TERMIOS
- # include <termios.h>
- #else /* !USE_TERMIOS */
- #ifdef USE_TERMIO
- # include <termio.h>
- #else /* !USE_TERMIO */
- #ifdef USE_SGTTY
- # include <sgtty.h>
- #endif /* USE_SGTTY */
- #endif /* !USE_TERMIO */
- #endif /* !USE_TERMIOS */
-
- /*
- * The following structure is used to set or get the serial port
- * attributes in a platform-independant manner.
- */
-
- typedef struct TtyAttrs {
- int baud;
- int parity;
- int data;
- int stop;
- } TtyAttrs;
-
- /*
- * This structure describes per-instance state of a file based channel.
- */
-
- typedef struct FileState {
- Tcl_Channel channel; /* Channel associated with this file. */
- int fd; /* File handle. */
- int validMask; /* OR'ed combination of TCL_READABLE,
- * TCL_WRITABLE, or TCL_EXCEPTION: indicates
- * which operations are valid on the file. */
- struct FileState *nextPtr; /* Pointer to next file in list of all
- * file channels. */
- } FileState;
-
- /*
- * List of all file channels currently open.
- */
-
- static FileState *firstFilePtr = NULL;
-
- /*
- * This structure describes per-instance state of a tcp based channel.
- */
-
- typedef struct TcpState {
- Tcl_Channel channel; /* Channel associated with this file. */
- int fd; /* The socket itself. */
- int flags; /* ORed combination of the bitfields
- * defined below. */
- Tcl_TcpAcceptProc *acceptProc;
- /* Proc to call on accept. */
- ClientData acceptProcData; /* The data for the accept proc. */
- } TcpState;
-
- /*
- * These bits may be ORed together into the "flags" field of a TcpState
- * structure.
- */
-
- #define TCP_ASYNC_SOCKET (1<<0) /* Asynchronous socket. */
- #define TCP_ASYNC_CONNECT (1<<1) /* Async connect in progress. */
-
- /*
- * The following defines the maximum length of the listen queue. This is
- * the number of outstanding yet-to-be-serviced requests for a connection
- * on a server socket, more than this number of outstanding requests and
- * the connection request will fail.
- */
-
- #ifndef SOMAXCONN
- #define SOMAXCONN 100
- #endif
-
- #if (SOMAXCONN < 100)
- #undef SOMAXCONN
- #define SOMAXCONN 100
- #endif
-
- /*
- * The following defines how much buffer space the kernel should maintain
- * for a socket.
- */
-
- #define SOCKET_BUFSIZE 4096
-
- /*
- * Static routines for this file:
- */
-
- static TcpState * CreateSocket _ANSI_ARGS_((Tcl_Interp *interp,
- int port, char *host, int server,
- char *myaddr, int myport, int async));
- static int CreateSocketAddress _ANSI_ARGS_(
- (struct sockaddr_in *sockaddrPtr,
- char *host, int port));
- static int FileBlockModeProc _ANSI_ARGS_((
- ClientData instanceData, int mode));
- static int FileCloseProc _ANSI_ARGS_((ClientData instanceData,
- Tcl_Interp *interp));
- static int FileGetHandleProc _ANSI_ARGS_((ClientData instanceData,
- int direction, ClientData *handlePtr));
- static int FileInputProc _ANSI_ARGS_((ClientData instanceData,
- char *buf, int toRead, int *errorCode));
- static int FileOutputProc _ANSI_ARGS_((
- ClientData instanceData, char *buf, int toWrite,
- int *errorCode));
- static int FileSeekProc _ANSI_ARGS_((ClientData instanceData,
- long offset, int mode, int *errorCode));
- static void FileWatchProc _ANSI_ARGS_((ClientData instanceData,
- int mask));
- static void TcpAccept _ANSI_ARGS_((ClientData data, int mask));
- static int TcpBlockModeProc _ANSI_ARGS_((ClientData data,
- int mode));
- static int TcpCloseProc _ANSI_ARGS_((ClientData instanceData,
- Tcl_Interp *interp));
- static int TcpGetHandleProc _ANSI_ARGS_((ClientData instanceData,
- int direction, ClientData *handlePtr));
- static int TcpGetOptionProc _ANSI_ARGS_((ClientData instanceData,
- Tcl_Interp *interp, char *optionName,
- Tcl_DString *dsPtr));
- static int TcpInputProc _ANSI_ARGS_((ClientData instanceData,
- char *buf, int toRead, int *errorCode));
- static int TcpOutputProc _ANSI_ARGS_((ClientData instanceData,
- char *buf, int toWrite, int *errorCode));
- static void TcpWatchProc _ANSI_ARGS_((ClientData instanceData,
- int mask));
- static int TtyParseMode _ANSI_ARGS_((Tcl_Interp *interp,
- CONST char *mode, int *speedPtr, int *parityPtr,
- int *dataPtr, int *stopPtr));
- static void TtyGetAttributes _ANSI_ARGS_((int fd,
- TtyAttrs *ttyPtr));
- static int TtyGetOptionProc _ANSI_ARGS_((ClientData instanceData,
- Tcl_Interp *interp, char *optionName,
- Tcl_DString *dsPtr));
- static void TtyInit _ANSI_ARGS_((int fd));
- static void TtySetAttributes _ANSI_ARGS_((int fd,
- TtyAttrs *ttyPtr));
- static int TtySetOptionProc _ANSI_ARGS_((ClientData instanceData,
- Tcl_Interp *interp, char *optionName,
- char *value));
- static int WaitForConnect _ANSI_ARGS_((TcpState *statePtr,
- int *errorCodePtr));
-
- /*
- * This structure describes the channel type structure for file based IO:
- */
-
- static Tcl_ChannelType fileChannelType = {
- "file", /* Type name. */
- FileBlockModeProc, /* Set blocking/nonblocking mode.*/
- FileCloseProc, /* Close proc. */
- FileInputProc, /* Input proc. */
- FileOutputProc, /* Output proc. */
- FileSeekProc, /* Seek proc. */
- NULL, /* Set option proc. */
- NULL, /* Get option proc. */
- FileWatchProc, /* Initialize notifier. */
- FileGetHandleProc, /* Get OS handles out of channel. */
- };
-
- /*
- * This structure describes the channel type structure for serial IO.
- * Note that this type is a subclass of the "file" type.
- */
-
- static Tcl_ChannelType ttyChannelType = {
- "tty", /* Type name. */
- FileBlockModeProc, /* Set blocking/nonblocking mode.*/
- FileCloseProc, /* Close proc. */
- FileInputProc, /* Input proc. */
- FileOutputProc, /* Output proc. */
- NULL, /* Seek proc. */
- TtySetOptionProc, /* Set option proc. */
- TtyGetOptionProc, /* Get option proc. */
- FileWatchProc, /* Initialize notifier. */
- FileGetHandleProc, /* Get OS handles out of channel. */
- };
-
- /*
- * This structure describes the channel type structure for TCP socket
- * based IO:
- */
-
- static Tcl_ChannelType tcpChannelType = {
- "tcp", /* Type name. */
- TcpBlockModeProc, /* Set blocking/nonblocking mode.*/
- TcpCloseProc, /* Close proc. */
- TcpInputProc, /* Input proc. */
- TcpOutputProc, /* Output proc. */
- NULL, /* Seek proc. */
- NULL, /* Set option proc. */
- TcpGetOptionProc, /* Get option proc. */
- TcpWatchProc, /* Initialize notifier. */
- TcpGetHandleProc, /* Get OS handles out of channel. */
- };
-
-
- /*
- *----------------------------------------------------------------------
- *
- * FileBlockModeProc --
- *
- * Helper procedure to set blocking and nonblocking modes on a
- * file based channel. Invoked by generic IO level code.
- *
- * Results:
- * 0 if successful, errno when failed.
- *
- * Side effects:
- * Sets the device into blocking or non-blocking mode.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static int
- FileBlockModeProc(instanceData, mode)
- ClientData instanceData; /* File state. */
- int mode; /* The mode to set. Can be one of
- * TCL_MODE_BLOCKING or
- * TCL_MODE_NONBLOCKING. */
- {
- FileState *fsPtr = (FileState *) instanceData;
- int curStatus;
-
- #ifndef USE_FIONBIO
- curStatus = fcntl(fsPtr->fd, F_GETFL);
- if (mode == TCL_MODE_BLOCKING) {
- curStatus &= (~(O_NONBLOCK));
- } else {
- curStatus |= O_NONBLOCK;
- }
- if (fcntl(fsPtr->fd, F_SETFL, curStatus) < 0) {
- return errno;
- }
- curStatus = fcntl(fsPtr->fd, F_GETFL);
- #else
- if (mode == TCL_MODE_BLOCKING) {
- curStatus = 0;
- } else {
- curStatus = 1;
- }
- if (ioctl(fsPtr->fd, (int) FIONBIO, &curStatus) < 0) {
- return errno;
- }
- #endif
- return 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FileInputProc --
- *
- * This procedure is invoked from the generic IO level to read
- * input from a file based channel.
- *
- * Results:
- * The number of bytes read is returned or -1 on error. An output
- * argument contains a POSIX error code if an error occurs, or zero.
- *
- * Side effects:
- * Reads input from the input device of the channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- FileInputProc(instanceData, buf, toRead, errorCodePtr)
- ClientData instanceData; /* File state. */
- char *buf; /* Where to store data read. */
- int toRead; /* How much space is available
- * in the buffer? */
- int *errorCodePtr; /* Where to store error code. */
- {
- FileState *fsPtr = (FileState *) instanceData;
- int bytesRead; /* How many bytes were actually
- * read from the input device? */
-
- *errorCodePtr = 0;
-
- /*
- * Assume there is always enough input available. This will block
- * appropriately, and read will unblock as soon as a short read is
- * possible, if the channel is in blocking mode. If the channel is
- * nonblocking, the read will never block.
- */
-
- bytesRead = read(fsPtr->fd, buf, (size_t) toRead);
- if (bytesRead > -1) {
- return bytesRead;
- }
- *errorCodePtr = errno;
- return -1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FileOutputProc--
- *
- * This procedure is invoked from the generic IO level to write
- * output to a file channel.
- *
- * Results:
- * The number of bytes written is returned or -1 on error. An
- * output argument contains a POSIX error code if an error occurred,
- * or zero.
- *
- * Side effects:
- * Writes output on the output device of the channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- FileOutputProc(instanceData, buf, toWrite, errorCodePtr)
- ClientData instanceData; /* File state. */
- char *buf; /* The data buffer. */
- int toWrite; /* How many bytes to write? */
- int *errorCodePtr; /* Where to store error code. */
- {
- FileState *fsPtr = (FileState *) instanceData;
- int written;
-
- *errorCodePtr = 0;
- written = write(fsPtr->fd, buf, (size_t) toWrite);
- if (written > -1) {
- return written;
- }
- *errorCodePtr = errno;
- return -1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FileCloseProc --
- *
- * This procedure is called from the generic IO level to perform
- * channel-type-specific cleanup when a file based channel is closed.
- *
- * Results:
- * 0 if successful, errno if failed.
- *
- * Side effects:
- * Closes the device of the channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- FileCloseProc(instanceData, interp)
- ClientData instanceData; /* File state. */
- Tcl_Interp *interp; /* For error reporting - unused. */
- {
- FileState *fsPtr = (FileState *) instanceData;
- FileState **nextPtrPtr;
- int errorCode = 0;
-
- Tcl_DeleteFileHandler(fsPtr->fd);
- if (!TclInExit()
- || ((fsPtr->fd != 0) && (fsPtr->fd != 1) && (fsPtr->fd != 2))) {
- if (close(fsPtr->fd) < 0) {
- errorCode = errno;
- }
- }
- for (nextPtrPtr = &firstFilePtr; (*nextPtrPtr) != NULL;
- nextPtrPtr = &((*nextPtrPtr)->nextPtr)) {
- if ((*nextPtrPtr) == fsPtr) {
- (*nextPtrPtr) = fsPtr->nextPtr;
- break;
- }
- }
- ckfree((char *) fsPtr);
- return errorCode;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FileSeekProc --
- *
- * This procedure is called by the generic IO level to move the
- * access point in a file based channel.
- *
- * Results:
- * -1 if failed, the new position if successful. An output
- * argument contains the POSIX error code if an error occurred,
- * or zero.
- *
- * Side effects:
- * Moves the location at which the channel will be accessed in
- * future operations.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- FileSeekProc(instanceData, offset, mode, errorCodePtr)
- ClientData instanceData; /* File state. */
- long offset; /* Offset to seek to. */
- int mode; /* Relative to where
- * should we seek? Can be
- * one of SEEK_START,
- * SEEK_SET or SEEK_END. */
- int *errorCodePtr; /* To store error code. */
- {
- FileState *fsPtr = (FileState *) instanceData;
- int newLoc;
-
- newLoc = lseek(fsPtr->fd, offset, mode);
-
- *errorCodePtr = (newLoc == -1) ? errno : 0;
- return newLoc;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FileWatchProc --
- *
- * Initialize the notifier to watch the fd from this channel.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Sets up the notifier so that a future event on the channel will
- * be seen by Tcl.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- FileWatchProc(instanceData, mask)
- ClientData instanceData; /* The file state. */
- int mask; /* Events of interest; an OR-ed
- * combination of TCL_READABLE,
- * TCL_WRITABLE and TCL_EXCEPTION. */
- {
- FileState *fsPtr = (FileState *) instanceData;
-
- /*
- * Make sure we only register for events that are valid on this file.
- * Note that we are passing Tcl_NotifyChannel directly to
- * Tcl_CreateFileHandler with the channel pointer as the client data.
- */
-
- mask &= fsPtr->validMask;
- if (mask) {
- Tcl_CreateFileHandler(fsPtr->fd, mask,
- (Tcl_FileProc *) Tcl_NotifyChannel,
- (ClientData) fsPtr->channel);
- } else {
- Tcl_DeleteFileHandler(fsPtr->fd);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FileGetHandleProc --
- *
- * Called from Tcl_GetChannelFile to retrieve OS handles from
- * a file based channel.
- *
- * Results:
- * Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if
- * there is no handle for the specified direction.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- FileGetHandleProc(instanceData, direction, handlePtr)
- ClientData instanceData; /* The file state. */
- int direction; /* TCL_READABLE or TCL_WRITABLE */
- ClientData *handlePtr; /* Where to store the handle. */
- {
- FileState *fsPtr = (FileState *) instanceData;
-
- if (direction & fsPtr->validMask) {
- *handlePtr = (ClientData) fsPtr->fd;
- return TCL_OK;
- } else {
- return TCL_ERROR;
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TtySetOptionProc --
- *
- * Sets an option on a channel.
- *
- * Results:
- * A standard Tcl result. Also sets interp->result on error if
- * interp is not NULL.
- *
- * Side effects:
- * May modify an option on a device.
- * Sets Error message if needed (by calling Tcl_BadChannelOption).
- *
- *----------------------------------------------------------------------
- */
-
- static int
- TtySetOptionProc(instanceData, interp, optionName, value)
- ClientData instanceData; /* File state. */
- Tcl_Interp *interp; /* For error reporting - can be NULL. */
- char *optionName; /* Which option to set? */
- char *value; /* New value for option. */
- {
- FileState *fsPtr = (FileState *) instanceData;
- unsigned int len;
- TtyAttrs tty;
-
- len = strlen(optionName);
- if ((len > 1) && (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;
- } else {
- return Tcl_BadChannelOption(interp, optionName, "mode");
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * 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(instanceData, interp, optionName, dsPtr)
- ClientData instanceData; /* File state. */
- Tcl_Interp *interp; /* For error reporting - can be NULL. */
- char *optionName; /* Option to get. */
- Tcl_DString *dsPtr; /* Where to store value(s). */
- {
- FileState *fsPtr = (FileState *) instanceData;
- unsigned int len;
- char buf[32];
- TtyAttrs tty;
-
- if (optionName == NULL) {
- Tcl_DStringAppendElement(dsPtr, "-mode");
- len = 0;
- } else {
- len = strlen(optionName);
- }
- if ((len == 0) ||
- ((len > 1) && (strncmp(optionName, "-mode", len) == 0))) {
- TtyGetAttributes(fsPtr->fd, &tty);
- sprintf(buf, "%d,%c,%d,%d", tty.baud, tty.parity, tty.data, tty.stop);
- Tcl_DStringAppendElement(dsPtr, buf);
- return TCL_OK;
- } else {
- return Tcl_BadChannelOption(interp, optionName, "mode");
- }
- }
-
- #undef DIRECT_BAUD
- #ifdef B4800
- # if (B4800 == 4800)
- # define DIRECT_BAUD
- # endif
- #endif
-
- #ifdef DIRECT_BAUD
- # define TtyGetSpeed(baud) ((unsigned) (baud))
- # define TtyGetBaud(speed) ((int) (speed))
- #else
-
- static struct {int baud; unsigned long speed;} speeds[] = {
- #ifdef B0
- {0, B0},
- #endif
- #ifdef B50
- {50, B50},
- #endif
- #ifdef B75
- {75, B75},
- #endif
- #ifdef B110
- {110, B110},
- #endif
- #ifdef B134
- {134, B134},
- #endif
- #ifdef B150
- {150, B150},
- #endif
- #ifdef B200
- {200, B200},
- #endif
- #ifdef B300
- {300, B300},
- #endif
- #ifdef B600
- {600, B600},
- #endif
- #ifdef B1200
- {1200, B1200},
- #endif
- #ifdef B1800
- {1800, B1800},
- #endif
- #ifdef B2400
- {2400, B2400},
- #endif
- #ifdef B4800
- {4800, B4800},
- #endif
- #ifdef B9600
- {9600, B9600},
- #endif
- #ifdef B14400
- {14400, B14400},
- #endif
- #ifdef B19200
- {19200, B19200},
- #endif
- #ifdef EXTA
- {19200, EXTA},
- #endif
- #ifdef B28800
- {28800, B28800},
- #endif
- #ifdef B38400
- {38400, B38400},
- #endif
- #ifdef EXTB
- {38400, EXTB},
- #endif
- #ifdef B57600
- {57600, B57600},
- #endif
- #ifdef _B57600
- {57600, _B57600},
- #endif
- #ifdef B76800
- {76800, B76800},
- #endif
- #ifdef B115200
- {115200, B115200},
- #endif
- #ifdef _B115200
- {115200, _B115200},
- #endif
- #ifdef B153600
- {153600, B153600},
- #endif
- #ifdef B230400
- {230400, B230400},
- #endif
- #ifdef B307200
- {307200, B307200},
- #endif
- #ifdef B460800
- {460800, B460800},
- #endif
- {-1, 0}
- };
-
- /*
- *---------------------------------------------------------------------------
- *
- * 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(baud)
- int baud; /* The baud rate to look up. */
- {
- int bestIdx, bestDiff, i, diff;
-
- bestIdx = 0;
- bestDiff = 1000000;
-
- /*
- * If the baud rate does not correspond to one of the known mask values,
- * choose the mask value whose baud rate is closest to the specified
- * baud rate.
- */
-
- for (i = 0; speeds[i].baud >= 0; i++) {
- diff = speeds[i].baud - baud;
- if (diff < 0) {
- diff = -diff;
- }
- if (diff < bestDiff) {
- bestIdx = i;
- bestDiff = diff;
- }
- }
- return speeds[bestIdx].speed;
- }
-
- /*
- *---------------------------------------------------------------------------
- *
- * 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(speed)
- 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 */
-
-
- /*
- *---------------------------------------------------------------------------
- *
- * 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.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Serial device initialized.
- *
- *---------------------------------------------------------------------------
- */
-
- static void
- TtyInit(fd)
- int fd; /* Open file descriptor for serial port to
- * be initialized. */
- {
- #ifdef USE_TERMIOS
- struct termios termios;
-
- tcgetattr(fd, &termios);
- termios.c_iflag = IGNBRK;
- termios.c_oflag = 0;
- termios.c_lflag = 0;
- termios.c_cflag |= CREAD;
- termios.c_cc[VMIN] = 60;
- termios.c_cc[VTIME] = 2;
- tcsetattr(fd, TCSANOW, &termios);
- #else /* !USE_TERMIOS */
- #ifdef USE_TERMIO
- struct termio termio;
-
- ioctl(fd, TCGETA, &termio);
- termio.c_iflag = IGNBRK;
- termio.c_oflag = 0;
- termio.c_lflag = 0;
- termio.c_cflag |= CREAD;
- termio.c_cc[VMIN] = 60;
- termio.c_cc[VTIME] = 2;
- ioctl(fd, TCSETAW, &termio);
- #else /* !USE_TERMIO */
- #ifdef USE_SGTTY
- struct sgttyb sgttyb;
-
- ioctl(fd, TIOCGETP, &sgttyb);
- sgttyb.sg_flags &= (EVENP | ODDP);
- sgttyb.sg_flags |= RAW;
- ioctl(fd, TIOCSETP, &sgttyb);
- #endif /* USE_SGTTY */
- #endif /* !USE_TERMIO */
- #endif /* !USE_TERMIOS */
- }
-
- /*
- *---------------------------------------------------------------------------
- *
- * TtyGetAttributes --
- *
- * Get the current attributes of the specified serial device.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
- static void
- TtyGetAttributes(fd, ttyPtr)
- int fd; /* Open file descriptor for serial port to
- * be queried. */
- TtyAttrs *ttyPtr; /* Buffer filled with serial port
- * attributes. */
- {
- #ifdef USE_TERMIOS
- int parity, data;
- struct termios termios;
-
- tcgetattr(fd, &termios);
- ttyPtr->baud = TtyGetBaud(cfgetospeed(&termios));
-
- parity = 'n';
- #ifdef PAREXT
- switch ((int) (termios.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;
- }
- #else /* !PAREXT */
- switch ((int) (termios.c_cflag & (PARENB | PARODD))) {
- case PARENB : parity = 'e'; break;
- case PARENB | PARODD : parity = 'o'; break;
- }
- #endif /* !PAREXT */
- ttyPtr->parity = parity;
-
- data = termios.c_cflag & CSIZE;
- ttyPtr->data = (data == CS5) ? 5 : (data == CS6) ? 6 :
- (data == CS7) ? 7 : 8;
-
- ttyPtr->stop = (termios.c_cflag & CSTOPB) ? 2 : 1;
- #else /* !USE_TERMIOS */
- #ifdef USE_TERMIO
- int parity, data;
- struct termio termio;
-
- ioctl(fd, TCGETA, &termio);
- ttyPtr->baud = TtyGetBaud(termio.c_cflag & CBAUD);
- parity = 'n';
- switch (termio.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;
- }
- ttyPtr->parity = parity;
-
- data = termio.c_cflag & CSIZE;
- ttyPtr->data = (data == CS5) ? 5 : (data == CS6) ? 6 :
- (data == CS7) ? 7 : 8;
-
- ttyPtr->stop = (termio.c_cflag & CSTOPB) ? 2 : 1;
- #else /* !USE_TERMIO */
- #ifdef USE_SGTTY
- int parity;
- struct sgttyb sgttyb;
-
- ioctl(fd, TIOCGETP, &sgttyb);
- ttyPtr->baud = TtyGetBaud(sgttyb.sg_ospeed);
- parity = 'n';
- if (sgttyb.sg_flags & EVENP) {
- parity = 'e';
- } else if (sgttyb.sg_flags & ODDP) {
- parity = 'o';
- }
- ttyPtr->parity = parity;
- ttyPtr->data = (sgttyb.sg_flags & (EVENP | ODDP)) ? 7 : 8;
- ttyPtr->stop = 1;
- #else /* !USE_SGTTY */
- ttyPtr->baud = 0;
- ttyPtr->parity = 'n';
- ttyPtr->data = 0;
- ttyPtr->stop = 0;
- #endif /* !USE_SGTTY */
- #endif /* !USE_TERMIO */
- #endif /* !USE_TERMIOS */
- }
-
- /*
- *---------------------------------------------------------------------------
- *
- * TtySetAttributes --
- *
- * Set the current attributes of the specified serial device.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
- static void
- TtySetAttributes(fd, ttyPtr)
- int fd; /* Open file descriptor for serial port to
- * be modified. */
- TtyAttrs *ttyPtr; /* Buffer containing new attributes for
- * serial port. */
- {
- #ifdef USE_TERMIOS
- int parity, data, flag;
- struct termios termios;
-
- tcgetattr(fd, &termios);
- cfsetospeed(&termios, TtyGetSpeed(ttyPtr->baud));
- cfsetispeed(&termios, TtyGetSpeed(ttyPtr->baud));
-
- flag = 0;
- parity = ttyPtr->parity;
- if (parity != 'n') {
- flag |= PARENB;
- #ifdef PAREXT
- termios.c_cflag &= ~PAREXT;
- if ((parity == 'm') || (parity == 's')) {
- flag |= PAREXT;
- }
- #endif
- if ((parity == 'm') || (parity == 'o')) {
- flag |= PARODD;
- }
- }
- data = ttyPtr->data;
- flag |= (data == 5) ? CS5 : (data == 6) ? CS6 : (data == 7) ? CS7 : CS8;
- if (ttyPtr->stop == 2) {
- flag |= CSTOPB;
- }
-
- termios.c_cflag &= ~(PARENB | PARODD | CSIZE | CSTOPB);
- termios.c_cflag |= flag;
- tcsetattr(fd, TCSANOW, &termios);
-
- #else /* !USE_TERMIOS */
- #ifdef USE_TERMIO
- int parity, data, flag;
- struct termio termio;
-
- ioctl(fd, TCGETA, &termio);
- termio.c_cflag &= ~CBAUD;
- termio.c_cflag |= TtyGetSpeed(ttyPtr->baud);
-
- flag = 0;
- parity = ttyPtr->parity;
- if (parity != 'n') {
- flag |= PARENB;
- if ((parity == 'm') || (parity == 's')) {
- flag |= PAREXT;
- }
- if ((parity == 'm') || (parity == 'o')) {
- flag |= PARODD;
- }
- }
- data = ttyPtr->data;
- flag |= (data == 5) ? CS5 : (data == 6) ? CS6 : (data == 7) ? CS7 : CS8;
- if (ttyPtr->stop == 2) {
- flag |= CSTOPB;
- }
-
- termio.c_cflag &= ~(PARENB | PARODD | PAREXT | CSIZE | CSTOPB);
- termio.c_cflag |= flag;
- ioctl(fd, TCSETAW, &termio);
-
- #else /* !USE_TERMIO */
- #ifdef USE_SGTTY
- int parity;
- struct sgttyb sgttyb;
-
- ioctl(fd, TIOCGETP, &sgttyb);
- sgttyb.sg_ospeed = TtyGetSpeed(ttyPtr->baud);
- sgttyb.sg_ispeed = TtyGetSpeed(ttyPtr->baud);
-
- parity = ttyPtr->parity;
- if (parity == 'e') {
- sgttyb.sg_flags &= ~ODDP;
- sgttyb.sg_flags |= EVENP;
- } else if (parity == 'o') {
- sgttyb.sg_flags &= ~EVENP;
- sgttyb.sg_flags |= ODDP;
- }
- ioctl(fd, TIOCSETP, &sgttyb);
- #endif /* USE_SGTTY */
- #endif /* !USE_TERMIO */
- #endif /* !USE_TERMIOS */
- }
-
- /*
- *---------------------------------------------------------------------------
- *
- * 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 interp->result (if interp is non-NULL).
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
- static int
- TtyParseMode(interp, mode, speedPtr, parityPtr, dataPtr, stopPtr)
- 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 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_AppendResult(interp, bad, ": should be baud,parity,data,stop",
- NULL);
- }
- return TCL_ERROR;
- }
- if (strchr("noems", parity) == NULL) {
- if (interp != NULL) {
- Tcl_AppendResult(interp, bad,
- " parity: should be n, o, e, m, or s", NULL);
- }
- return TCL_ERROR;
- }
- *parityPtr = parity;
- if ((*dataPtr < 5) || (*dataPtr > 8)) {
- if (interp != NULL) {
- Tcl_AppendResult(interp, bad, " data: should be 5, 6, 7, or 8",
- NULL);
- }
- return TCL_ERROR;
- }
- if ((*stopPtr < 0) || (*stopPtr > 2)) {
- if (interp != NULL) {
- Tcl_AppendResult(interp, bad, " stop: should be 1 or 2", NULL);
- }
- return TCL_ERROR;
- }
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_OpenFileChannel --
- *
- * Open an file based channel on Unix systems.
- *
- * Results:
- * The new channel or NULL. If NULL, the output argument
- * errorCodePtr is set to a POSIX error and an error message is
- * left in interp->result if interp is not NULL.
- *
- * Side effects:
- * May open the channel and may cause creation of a file on the
- * file system.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- Tcl_OpenFileChannel(interp, fileName, modeString, permissions)
- Tcl_Interp *interp; /* Interpreter for error reporting;
- * can be NULL. */
- char *fileName; /* Name of file to open. */
- char *modeString; /* A list of POSIX open modes or
- * a string such as "rw". */
- int permissions; /* If the open involves creating a
- * file, with what modes to create
- * it? */
- {
- int fd, seekFlag, mode, channelPermissions;
- FileState *fsPtr;
- char *nativeName, channelName[20];
- Tcl_DString buffer;
- Tcl_ChannelType *channelTypePtr;
-
- mode = TclGetOpenMode(interp, modeString, &seekFlag);
- if (mode == -1) {
- return NULL;
- }
- switch (mode & (O_RDONLY | O_WRONLY | O_RDWR)) {
- case O_RDONLY:
- channelPermissions = TCL_READABLE;
- break;
- case O_WRONLY:
- channelPermissions = TCL_WRITABLE;
- break;
- case O_RDWR:
- channelPermissions = (TCL_READABLE | TCL_WRITABLE);
- break;
- default:
- /*
- * This may occurr if modeString was "", for example.
- */
- panic("Tcl_OpenFileChannel: invalid mode value");
- return NULL;
- }
-
- nativeName = Tcl_TranslateFileName(interp, fileName, &buffer);
- if (nativeName == NULL) {
- return NULL;
- }
- fd = open(nativeName, mode, permissions);
-
- /*
- * If nativeName is not NULL, the buffer is valid and we must free
- * the storage.
- */
-
- Tcl_DStringFree(&buffer);
-
- if (fd < 0) {
- if (interp != (Tcl_Interp *) NULL) {
- Tcl_AppendResult(interp, "couldn't open \"", fileName, "\": ",
- Tcl_PosixError(interp), (char *) NULL);
- }
- return NULL;
- }
-
- /*
- * Set close-on-exec flag on the fd so that child processes will not
- * inherit this fd.
- */
-
- fcntl(fd, F_SETFD, FD_CLOEXEC);
-
- sprintf(channelName, "file%d", fd);
-
- fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState));
- fsPtr->nextPtr = firstFilePtr;
- firstFilePtr = fsPtr;
- fsPtr->validMask = channelPermissions | TCL_EXCEPTION;
- fsPtr->fd = fd;
-
- if (isatty(fd)) {
- /*
- * Initialize the serial port to a set of sane parameters.
- * Especially important if the remote device is set to echo and
- * the serial port driver was also set to echo -- as soon as a char
- * were sent to the serial port, the remote device would echo it,
- * then the serial driver would echo it back to the device, etc.
- */
-
- TtyInit(fd);
- channelTypePtr = &ttyChannelType;
- } else {
- channelTypePtr = &fileChannelType;
- }
-
- fsPtr->channel = Tcl_CreateChannel(channelTypePtr, channelName,
- (ClientData) fsPtr, channelPermissions);
-
- if (seekFlag) {
- if (Tcl_Seek(fsPtr->channel, 0, SEEK_END) < 0) {
- if (interp != (Tcl_Interp *) NULL) {
- Tcl_AppendResult(interp, "couldn't seek to end of file on \"",
- channelName, "\": ", Tcl_PosixError(interp), NULL);
- }
- Tcl_Close(NULL, fsPtr->channel);
- return NULL;
- }
- }
-
- if (channelTypePtr == &ttyChannelType) {
- /*
- * Gotcha. Most modems need a "\r" at the end of the command
- * sequence. If you just send "at\n", the modem will not respond
- * with "OK" because it never got a "\r" to actually invoke the
- * command. So, by default, newlines are translated to "\r\n" on
- * output to avoid "bug" reports that the serial port isn't working.
- */
-
- if (Tcl_SetChannelOption(interp, fsPtr->channel, "-translation",
- "auto crlf") != TCL_OK) {
- Tcl_Close(NULL, fsPtr->channel);
- return NULL;
- }
- }
-
- return fsPtr->channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_MakeFileChannel --
- *
- * Makes a Tcl_Channel from an existing OS level file handle.
- *
- * Results:
- * The Tcl_Channel created around the preexisting OS level file handle.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- Tcl_MakeFileChannel(handle, mode)
- ClientData handle; /* OS level handle. */
- int mode; /* ORed combination of TCL_READABLE and
- * TCL_WRITABLE to indicate file mode. */
- {
- FileState *fsPtr;
- char channelName[20];
- int fd = (int) handle;
-
- if (mode == 0) {
- return NULL;
- }
-
- sprintf(channelName, "file%d", fd);
-
- /*
- * Look to see if a channel with this fd and the same mode already exists.
- * If the fd is used, but the mode doesn't match, return NULL.
- */
-
- for (fsPtr = firstFilePtr; fsPtr != NULL; fsPtr = fsPtr->nextPtr) {
- if (fsPtr->fd == fd) {
- return (mode == fsPtr->validMask) ? fsPtr->channel : NULL;
- }
- }
-
- fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState));
- fsPtr->nextPtr = firstFilePtr;
- firstFilePtr = fsPtr;
- fsPtr->fd = fd;
- fsPtr->validMask = mode | TCL_EXCEPTION;
- fsPtr->channel = Tcl_CreateChannel(&fileChannelType, channelName,
- (ClientData) fsPtr, mode);
-
- return fsPtr->channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpBlockModeProc --
- *
- * This procedure is invoked by the generic IO level to set blocking
- * and nonblocking mode on a TCP socket based channel.
- *
- * Results:
- * 0 if successful, errno when failed.
- *
- * Side effects:
- * Sets the device into blocking or nonblocking mode.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static int
- TcpBlockModeProc(instanceData, mode)
- ClientData instanceData; /* Socket state. */
- int mode; /* The mode to set. Can be one of
- * TCL_MODE_BLOCKING or
- * TCL_MODE_NONBLOCKING. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
- int setting;
-
- #ifndef USE_FIONBIO
- setting = fcntl(statePtr->fd, F_GETFL);
- if (mode == TCL_MODE_BLOCKING) {
- statePtr->flags &= (~(TCP_ASYNC_SOCKET));
- setting &= (~(O_NONBLOCK));
- } else {
- statePtr->flags |= TCP_ASYNC_SOCKET;
- setting |= O_NONBLOCK;
- }
- if (fcntl(statePtr->fd, F_SETFL, setting) < 0) {
- return errno;
- }
- #endif
-
- #ifdef USE_FIONBIO
- if (mode == TCL_MODE_BLOCKING) {
- statePtr->flags &= (~(TCP_ASYNC_SOCKET));
- setting = 0;
- if (ioctl(statePtr->fd, (int) FIONBIO, &setting) == -1) {
- return errno;
- }
- } else {
- statePtr->flags |= TCP_ASYNC_SOCKET;
- setting = 1;
- if (ioctl(statePtr->fd, (int) FIONBIO, &setting) == -1) {
- return errno;
- }
- }
- #endif
-
- return 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * WaitForConnect --
- *
- * Waits for a connection on an asynchronously opened socket to
- * be completed.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The socket is connected after this function returns.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- WaitForConnect(statePtr, errorCodePtr)
- TcpState *statePtr; /* State of the socket. */
- int *errorCodePtr; /* Where to store errors? */
- {
- int timeOut; /* How long to wait. */
- int state; /* Of calling TclWaitForFile. */
- int flags; /* fcntl flags for the socket. */
-
- /*
- * If an asynchronous connect is in progress, attempt to wait for it
- * to complete before reading.
- */
-
- if (statePtr->flags & TCP_ASYNC_CONNECT) {
- if (statePtr->flags & TCP_ASYNC_SOCKET) {
- timeOut = 0;
- } else {
- timeOut = -1;
- }
- errno = 0;
- state = TclUnixWaitForFile(statePtr->fd,
- TCL_WRITABLE | TCL_EXCEPTION, timeOut);
- if (!(statePtr->flags & TCP_ASYNC_SOCKET)) {
- #ifndef USE_FIONBIO
- flags = fcntl(statePtr->fd, F_GETFL);
- flags &= (~(O_NONBLOCK));
- (void) fcntl(statePtr->fd, F_SETFL, flags);
- #endif
-
- #ifdef USE_FIONBIO
- flags = 0;
- (void) ioctl(statePtr->fd, FIONBIO, &flags);
- #endif
- }
- if (state & TCL_EXCEPTION) {
- return -1;
- }
- if (state & TCL_WRITABLE) {
- statePtr->flags &= (~(TCP_ASYNC_CONNECT));
- } else if (timeOut == 0) {
- *errorCodePtr = errno = EWOULDBLOCK;
- return -1;
- }
- }
- return 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpInputProc --
- *
- * This procedure is invoked by the generic IO level to read input
- * from a TCP socket based channel.
- *
- * NOTE: We cannot share code with FilePipeInputProc because here
- * we must use recv to obtain the input from the channel, not read.
- *
- * Results:
- * The number of bytes read is returned or -1 on error. An output
- * argument contains the POSIX error code on error, or zero if no
- * error occurred.
- *
- * Side effects:
- * Reads input from the input device of the channel.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static int
- TcpInputProc(instanceData, buf, bufSize, errorCodePtr)
- ClientData instanceData; /* Socket state. */
- char *buf; /* Where to store data read. */
- int bufSize; /* How much space is available
- * in the buffer? */
- int *errorCodePtr; /* Where to store error code. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
- int bytesRead, state;
-
- *errorCodePtr = 0;
- state = WaitForConnect(statePtr, errorCodePtr);
- if (state != 0) {
- return -1;
- }
- bytesRead = recv(statePtr->fd, buf, bufSize, 0);
- if (bytesRead > -1) {
- return bytesRead;
- }
- if (errno == ECONNRESET) {
-
- /*
- * Turn ECONNRESET into a soft EOF condition.
- */
-
- return 0;
- }
- *errorCodePtr = errno;
- return -1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpOutputProc --
- *
- * This procedure is invoked by the generic IO level to write output
- * to a TCP socket based channel.
- *
- * NOTE: We cannot share code with FilePipeOutputProc because here
- * we must use send, not write, to get reliable error reporting.
- *
- * Results:
- * The number of bytes written is returned. An output argument is
- * set to a POSIX error code if an error occurred, or zero.
- *
- * Side effects:
- * Writes output on the output device of the channel.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- TcpOutputProc(instanceData, buf, toWrite, errorCodePtr)
- ClientData instanceData; /* Socket state. */
- char *buf; /* The data buffer. */
- int toWrite; /* How many bytes to write? */
- int *errorCodePtr; /* Where to store error code. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
- int written;
- int state; /* Of waiting for connection. */
-
- *errorCodePtr = 0;
- state = WaitForConnect(statePtr, errorCodePtr);
- if (state != 0) {
- return -1;
- }
- written = send(statePtr->fd, buf, toWrite, 0);
- if (written > -1) {
- return written;
- }
- *errorCodePtr = errno;
- return -1;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpCloseProc --
- *
- * This procedure is invoked by the generic IO level to perform
- * channel-type-specific cleanup when a TCP socket based channel
- * is closed.
- *
- * Results:
- * 0 if successful, the value of errno if failed.
- *
- * Side effects:
- * Closes the socket of the channel.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static int
- TcpCloseProc(instanceData, interp)
- ClientData instanceData; /* The socket to close. */
- Tcl_Interp *interp; /* For error reporting - unused. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
- int errorCode = 0;
-
- /*
- * Delete a file handler that may be active for this socket if this
- * is a server socket - the file handler was created automatically
- * by Tcl as part of the mechanism to accept new client connections.
- * Channel handlers are already deleted in the generic IO channel
- * closing code that called this function, so we do not have to
- * delete them here.
- */
-
- Tcl_DeleteFileHandler(statePtr->fd);
-
- if (close(statePtr->fd) < 0) {
- errorCode = errno;
- }
- ckfree((char *) statePtr);
-
- return errorCode;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpGetOptionProc --
- *
- * Computes an option value for a TCP socket based channel, or a
- * list of all options and their values.
- *
- * Note: This code is based on code contributed by John Haxby.
- *
- * Results:
- * A standard Tcl result. The value of the specified option or a
- * list of all options and their values is returned in the
- * supplied DString. Sets Error message if needed.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- TcpGetOptionProc(instanceData, interp, optionName, dsPtr)
- ClientData instanceData; /* Socket state. */
- Tcl_Interp *interp; /* For error reporting - can be NULL. */
- char *optionName; /* Name of the option to
- * retrieve the value for, or
- * NULL to get all options and
- * their values. */
- Tcl_DString *dsPtr; /* Where to store the computed
- * value; initialized by caller. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
- struct sockaddr_in sockname;
- struct sockaddr_in peername;
- struct hostent *hostEntPtr;
- int size = sizeof(struct sockaddr_in);
- size_t len = 0;
- char buf[128];
-
- if (optionName != (char *) NULL) {
- len = strlen(optionName);
- }
-
- if ((len == 0) ||
- ((len > 1) && (optionName[1] == 'p') &&
- (strncmp(optionName, "-peername", len) == 0))) {
- if (getpeername(statePtr->fd, (struct sockaddr *) &peername, &size)
- >= 0) {
- if (len == 0) {
- Tcl_DStringAppendElement(dsPtr, "-peername");
- Tcl_DStringStartSublist(dsPtr);
- }
- Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr));
- hostEntPtr = gethostbyaddr((char *) &(peername.sin_addr),
- sizeof(peername.sin_addr), AF_INET);
- if (hostEntPtr != (struct hostent *) NULL) {
- Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name);
- } else {
- Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr));
- }
- sprintf(buf, "%d", ntohs(peername.sin_port));
- Tcl_DStringAppendElement(dsPtr, buf);
- if (len == 0) {
- Tcl_DStringEndSublist(dsPtr);
- } else {
- return TCL_OK;
- }
- } else {
- /*
- * getpeername failed - but if we were asked for all the options
- * (len==0), don't flag an error at that point because it could
- * be an fconfigure request on a server socket. (which have
- * no peer). same must be done on win&mac.
- */
-
- if (len) {
- if (interp) {
- Tcl_AppendResult(interp, "can't get peername: ",
- Tcl_PosixError(interp),
- (char *) NULL);
- }
- return TCL_ERROR;
- }
- }
- }
-
- if ((len == 0) ||
- ((len > 1) && (optionName[1] == 's') &&
- (strncmp(optionName, "-sockname", len) == 0))) {
- if (getsockname(statePtr->fd, (struct sockaddr *) &sockname, &size)
- >= 0) {
- if (len == 0) {
- Tcl_DStringAppendElement(dsPtr, "-sockname");
- Tcl_DStringStartSublist(dsPtr);
- }
- Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr));
- hostEntPtr = gethostbyaddr((char *) &(sockname.sin_addr),
- sizeof(peername.sin_addr), AF_INET);
- if (hostEntPtr != (struct hostent *) NULL) {
- Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name);
- } else {
- Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr));
- }
- sprintf(buf, "%d", ntohs(sockname.sin_port));
- Tcl_DStringAppendElement(dsPtr, buf);
- if (len == 0) {
- Tcl_DStringEndSublist(dsPtr);
- } else {
- return TCL_OK;
- }
- } else {
- if (interp) {
- Tcl_AppendResult(interp, "can't get sockname: ",
- Tcl_PosixError(interp),
- (char *) NULL);
- }
- return TCL_ERROR;
- }
- }
-
- if (len > 0) {
- return Tcl_BadChannelOption(interp, optionName, "peername sockname");
- }
-
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpWatchProc --
- *
- * Initialize the notifier to watch the fd from this channel.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Sets up the notifier so that a future event on the channel will
- * be seen by Tcl.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- TcpWatchProc(instanceData, mask)
- ClientData instanceData; /* The socket state. */
- int mask; /* Events of interest; an OR-ed
- * combination of TCL_READABLE,
- * TCL_WRITABLE and TCL_EXCEPTION. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
-
- if (mask) {
- Tcl_CreateFileHandler(statePtr->fd, mask,
- (Tcl_FileProc *) Tcl_NotifyChannel,
- (ClientData) statePtr->channel);
- } else {
- Tcl_DeleteFileHandler(statePtr->fd);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpGetHandleProc --
- *
- * Called from Tcl_GetChannelFile to retrieve OS handles from inside
- * a TCP socket based channel.
- *
- * Results:
- * Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if
- * there is no handle for the specified direction.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static int
- TcpGetHandleProc(instanceData, direction, handlePtr)
- ClientData instanceData; /* The socket state. */
- int direction; /* Not used. */
- ClientData *handlePtr; /* Where to store the handle. */
- {
- TcpState *statePtr = (TcpState *) instanceData;
-
- *handlePtr = (ClientData)statePtr->fd;
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * CreateSocket --
- *
- * This function opens a new socket in client or server mode
- * and initializes the TcpState structure.
- *
- * Results:
- * Returns a new TcpState, or NULL with an error in interp->result,
- * if interp is not NULL.
- *
- * Side effects:
- * Opens a socket.
- *
- *----------------------------------------------------------------------
- */
-
- static TcpState *
- CreateSocket(interp, port, host, server, myaddr, myport, async)
- Tcl_Interp *interp; /* For error reporting; can be NULL. */
- int port; /* Port number to open. */
- char *host; /* Name of host on which to open port.
- * NULL implies INADDR_ANY */
- int server; /* 1 if socket should be a server socket,
- * else 0 for a client socket. */
- char *myaddr; /* Optional client-side address */
- int myport; /* Optional client-side port */
- int async; /* If nonzero and creating a client socket,
- * attempt to do an async connect. Otherwise
- * do a synchronous connect or bind. */
- {
- int status, sock, asyncConnect, curState, origState;
- struct sockaddr_in sockaddr; /* socket address */
- struct sockaddr_in mysockaddr; /* Socket address for client */
- TcpState *statePtr;
-
- sock = -1;
- origState = 0;
- if (! CreateSocketAddress(&sockaddr, host, port)) {
- goto addressError;
- }
- if ((myaddr != NULL || myport != 0) &&
- ! CreateSocketAddress(&mysockaddr, myaddr, myport)) {
- goto addressError;
- }
-
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock < 0) {
- goto addressError;
- }
-
- /*
- * Set the close-on-exec flag so that the socket will not get
- * inherited by child processes.
- */
-
- fcntl(sock, F_SETFD, FD_CLOEXEC);
-
- /*
- * Set kernel space buffering
- */
-
- TclSockMinimumBuffers(sock, SOCKET_BUFSIZE);
-
- asyncConnect = 0;
- status = 0;
- if (server) {
-
- /*
- * Set up to reuse server addresses automatically and bind to the
- * specified port.
- */
-
- status = 1;
- (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &status,
- sizeof(status));
- status = bind(sock, (struct sockaddr *) &sockaddr,
- sizeof(struct sockaddr));
- if (status != -1) {
- status = listen(sock, SOMAXCONN);
- }
- } else {
- if (myaddr != NULL || myport != 0) {
- curState = 1;
- (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *) &curState, sizeof(curState));
- status = bind(sock, (struct sockaddr *) &mysockaddr,
- sizeof(struct sockaddr));
- if (status < 0) {
- goto bindError;
- }
- }
-
- /*
- * Attempt to connect. The connect may fail at present with an
- * EINPROGRESS but at a later time it will complete. The caller
- * will set up a file handler on the socket if she is interested in
- * being informed when the connect completes.
- */
-
- if (async) {
- #ifndef USE_FIONBIO
- origState = fcntl(sock, F_GETFL);
- curState = origState | O_NONBLOCK;
- status = fcntl(sock, F_SETFL, curState);
- #endif
-
- #ifdef USE_FIONBIO
- curState = 1;
- status = ioctl(sock, FIONBIO, &curState);
- #endif
- } else {
- status = 0;
- }
- if (status > -1) {
- status = connect(sock, (struct sockaddr *) &sockaddr,
- sizeof(sockaddr));
- if (status < 0) {
- if (errno == EINPROGRESS) {
- asyncConnect = 1;
- status = 0;
- }
- }
- }
- }
-
- bindError:
- if (status < 0) {
- if (interp != NULL) {
- Tcl_AppendResult(interp, "couldn't open socket: ",
- Tcl_PosixError(interp), (char *) NULL);
- }
- if (sock != -1) {
- close(sock);
- }
- return NULL;
- }
-
- /*
- * Allocate a new TcpState for this socket.
- */
-
- statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
- statePtr->flags = 0;
- if (asyncConnect) {
- statePtr->flags = TCP_ASYNC_CONNECT;
- }
- statePtr->fd = sock;
-
- return statePtr;
-
- addressError:
- if (sock != -1) {
- close(sock);
- }
- if (interp != NULL) {
- Tcl_AppendResult(interp, "couldn't open socket: ",
- Tcl_PosixError(interp), (char *) NULL);
- }
- return NULL;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * CreateSocketAddress --
- *
- * This function initializes a sockaddr structure for a host and port.
- *
- * Results:
- * 1 if the host was valid, 0 if the host could not be converted to
- * an IP address.
- *
- * Side effects:
- * Fills in the *sockaddrPtr structure.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- CreateSocketAddress(sockaddrPtr, host, port)
- struct sockaddr_in *sockaddrPtr; /* Socket address */
- char *host; /* Host. NULL implies INADDR_ANY */
- int port; /* Port number */
- {
- struct hostent *hostent; /* Host database entry */
- struct in_addr addr; /* For 64/32 bit madness */
-
- (void) memset((VOID *) sockaddrPtr, '\0', sizeof(struct sockaddr_in));
- sockaddrPtr->sin_family = AF_INET;
- sockaddrPtr->sin_port = htons((unsigned short) (port & 0xFFFF));
- if (host == NULL) {
- addr.s_addr = INADDR_ANY;
- } else {
- addr.s_addr = inet_addr(host);
- if (addr.s_addr == -1) {
- hostent = gethostbyname(host);
- if (hostent != NULL) {
- memcpy((VOID *) &addr,
- (VOID *) hostent->h_addr_list[0],
- (size_t) hostent->h_length);
- } else {
- #ifdef EHOSTUNREACH
- errno = EHOSTUNREACH;
- #else
- #ifdef ENXIO
- errno = ENXIO;
- #endif
- #endif
- return 0; /* error */
- }
- }
- }
-
- /*
- * NOTE: On 64 bit machines the assignment below is rumored to not
- * do the right thing. Please report errors related to this if you
- * observe incorrect behavior on 64 bit machines such as DEC Alphas.
- * Should we modify this code to do an explicit memcpy?
- */
-
- sockaddrPtr->sin_addr.s_addr = addr.s_addr;
- return 1; /* Success. */
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_OpenTcpClient --
- *
- * Opens a TCP client socket and creates a channel around it.
- *
- * Results:
- * The channel or NULL if failed. An error message is returned
- * in the interpreter on failure.
- *
- * Side effects:
- * Opens a client socket and creates a new channel.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- Tcl_OpenTcpClient(interp, port, host, myaddr, myport, async)
- Tcl_Interp *interp; /* For error reporting; can be NULL. */
- int port; /* Port number to open. */
- char *host; /* Host on which to open port. */
- char *myaddr; /* Client-side address */
- int myport; /* Client-side port */
- int async; /* If nonzero, attempt to do an
- * asynchronous connect. Otherwise
- * we do a blocking connect. */
- {
- TcpState *statePtr;
- char channelName[20];
-
- /*
- * Create a new client socket and wrap it in a channel.
- */
-
- statePtr = CreateSocket(interp, port, host, 0, myaddr, myport, async);
- if (statePtr == NULL) {
- return NULL;
- }
-
- statePtr->acceptProc = NULL;
- statePtr->acceptProcData = (ClientData) NULL;
-
- sprintf(channelName, "sock%d", statePtr->fd);
-
- statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
- (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE));
- if (Tcl_SetChannelOption(interp, statePtr->channel, "-translation",
- "auto crlf") == TCL_ERROR) {
- Tcl_Close((Tcl_Interp *) NULL, statePtr->channel);
- return NULL;
- }
- return statePtr->channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_MakeTcpClientChannel --
- *
- * Creates a Tcl_Channel from an existing client TCP socket.
- *
- * Results:
- * The Tcl_Channel wrapped around the preexisting TCP socket.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- Tcl_MakeTcpClientChannel(sock)
- ClientData sock; /* The socket to wrap up into a channel. */
- {
- TcpState *statePtr;
- char channelName[20];
-
- statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
- statePtr->fd = (int) sock;
- statePtr->acceptProc = NULL;
- statePtr->acceptProcData = (ClientData) NULL;
-
- sprintf(channelName, "sock%d", statePtr->fd);
-
- statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
- (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE));
- if (Tcl_SetChannelOption((Tcl_Interp *) NULL, statePtr->channel,
- "-translation", "auto crlf") == TCL_ERROR) {
- Tcl_Close((Tcl_Interp *) NULL, statePtr->channel);
- return NULL;
- }
- return statePtr->channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_OpenTcpServer --
- *
- * Opens a TCP server socket and creates a channel around it.
- *
- * Results:
- * The channel or NULL if failed. If an error occurred, an
- * error message is left in interp->result if interp is
- * not NULL.
- *
- * Side effects:
- * Opens a server socket and creates a new channel.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- Tcl_OpenTcpServer(interp, port, myHost, acceptProc, acceptProcData)
- Tcl_Interp *interp; /* For error reporting - may be
- * NULL. */
- int port; /* Port number to open. */
- char *myHost; /* Name of local host. */
- Tcl_TcpAcceptProc *acceptProc; /* Callback for accepting connections
- * from new clients. */
- ClientData acceptProcData; /* Data for the callback. */
- {
- TcpState *statePtr;
- char channelName[20];
-
- /*
- * Create a new client socket and wrap it in a channel.
- */
-
- statePtr = CreateSocket(interp, port, myHost, 1, NULL, 0, 0);
- if (statePtr == NULL) {
- return NULL;
- }
-
- statePtr->acceptProc = acceptProc;
- statePtr->acceptProcData = acceptProcData;
-
- /*
- * Set up the callback mechanism for accepting connections
- * from new clients.
- */
-
- Tcl_CreateFileHandler(statePtr->fd, TCL_READABLE, TcpAccept,
- (ClientData) statePtr);
- sprintf(channelName, "sock%d", statePtr->fd);
- statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
- (ClientData) statePtr, 0);
- return statePtr->channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TcpAccept --
- * Accept a TCP socket connection. This is called by the event loop.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Creates a new connection socket. Calls the registered callback
- * for the connection acceptance mechanism.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static void
- TcpAccept(data, mask)
- ClientData data; /* Callback token. */
- int mask; /* Not used. */
- {
- TcpState *sockState; /* Client data of server socket. */
- int newsock; /* The new client socket */
- TcpState *newSockState; /* State for new socket. */
- struct sockaddr_in addr; /* The remote address */
- int len; /* For accept interface */
- char channelName[20];
-
- sockState = (TcpState *) data;
-
- len = sizeof(struct sockaddr_in);
- newsock = accept(sockState->fd, (struct sockaddr *)&addr, &len);
- if (newsock < 0) {
- return;
- }
-
- /*
- * Set close-on-exec flag to prevent the newly accepted socket from
- * being inherited by child processes.
- */
-
- (void) fcntl(newsock, F_SETFD, FD_CLOEXEC);
-
- newSockState = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
-
- newSockState->flags = 0;
- newSockState->fd = newsock;
- newSockState->acceptProc = (Tcl_TcpAcceptProc *) NULL;
- newSockState->acceptProcData = (ClientData) NULL;
-
- sprintf(channelName, "sock%d", newsock);
- newSockState->channel = Tcl_CreateChannel(&tcpChannelType, channelName,
- (ClientData) newSockState, (TCL_READABLE | TCL_WRITABLE));
-
- Tcl_SetChannelOption((Tcl_Interp *) NULL, newSockState->channel,
- "-translation", "auto crlf");
-
- if (sockState->acceptProc != (Tcl_TcpAcceptProc *) NULL) {
- (sockState->acceptProc) (sockState->acceptProcData,
- newSockState->channel, inet_ntoa(addr.sin_addr),
- ntohs(addr.sin_port));
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclGetDefaultStdChannel --
- *
- * Creates channels for standard input, standard output or standard
- * error output if they do not already exist.
- *
- * Results:
- * Returns the specified default standard channel, or NULL.
- *
- * Side effects:
- * May cause the creation of a standard channel and the underlying
- * file.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Channel
- TclGetDefaultStdChannel(type)
- int type; /* One of TCL_STDIN, TCL_STDOUT, TCL_STDERR. */
- {
- Tcl_Channel channel = NULL;
- int fd = 0; /* Initializations needed to prevent */
- int mode = 0; /* compiler warning (used before set). */
- char *bufMode = NULL;
-
- switch (type) {
- case TCL_STDIN:
- if ((lseek(0, (off_t) 0, SEEK_CUR) == -1) &&
- (errno == EBADF)) {
- return (Tcl_Channel) NULL;
- }
- fd = 0;
- mode = TCL_READABLE;
- bufMode = "line";
- break;
- case TCL_STDOUT:
- if ((lseek(1, (off_t) 0, SEEK_CUR) == -1) &&
- (errno == EBADF)) {
- return (Tcl_Channel) NULL;
- }
- fd = 1;
- mode = TCL_WRITABLE;
- bufMode = "line";
- break;
- case TCL_STDERR:
- if ((lseek(2, (off_t) 0, SEEK_CUR) == -1) &&
- (errno == EBADF)) {
- return (Tcl_Channel) NULL;
- }
- fd = 2;
- mode = TCL_WRITABLE;
- bufMode = "none";
- break;
- default:
- panic("TclGetDefaultStdChannel: Unexpected channel type");
- break;
- }
-
- channel = Tcl_MakeFileChannel((ClientData) fd, mode);
-
- /*
- * Set up the normal channel options for stdio handles.
- */
-
- Tcl_SetChannelOption(NULL, channel, "-translation", "auto");
- Tcl_SetChannelOption(NULL, channel, "-buffering", bufMode);
- return channel;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_GetOpenFile --
- *
- * Given a name of a channel registered in the given interpreter,
- * returns a FILE * for it.
- *
- * Results:
- * A standard Tcl result. If the channel is registered in the given
- * interpreter and it is managed by the "file" channel driver, and
- * it is open for the requested mode, then the output parameter
- * filePtr is set to a FILE * for the underlying file. On error, the
- * filePtr is not set, TCL_ERROR is returned and an error message is
- * left in interp->result.
- *
- * Side effects:
- * May invoke fdopen to create the FILE * for the requested file.
- *
- *----------------------------------------------------------------------
- */
-
- int
- Tcl_GetOpenFile(interp, string, forWriting, checkUsage, filePtr)
- Tcl_Interp *interp; /* Interpreter in which to find file. */
- char *string; /* String that identifies file. */
- int forWriting; /* 1 means the file is going to be used
- * for writing, 0 means for reading. */
- int checkUsage; /* 1 means verify that the file was opened
- * in a mode that allows the access specified
- * by "forWriting". Ignored, we always
- * check that the channel is open for the
- * requested mode. */
- ClientData *filePtr; /* Store pointer to FILE structure here. */
- {
- Tcl_Channel chan;
- int chanMode;
- Tcl_ChannelType *chanTypePtr;
- int fd;
- FILE *f;
-
- chan = Tcl_GetChannel(interp, string, &chanMode);
- if (chan == (Tcl_Channel) NULL) {
- return TCL_ERROR;
- }
- if ((forWriting) && ((chanMode & TCL_WRITABLE) == 0)) {
- Tcl_AppendResult(interp,
- "\"", string, "\" wasn't opened for writing", (char *) NULL);
- return TCL_ERROR;
- } else if ((!(forWriting)) && ((chanMode & TCL_READABLE) == 0)) {
- Tcl_AppendResult(interp,
- "\"", string, "\" wasn't opened for reading", (char *) NULL);
- return TCL_ERROR;
- }
-
- /*
- * We allow creating a FILE * out of file based, pipe based and socket
- * based channels. We currently do not allow any other channel types,
- * because it is likely that stdio will not know what to do with them.
- */
-
- chanTypePtr = Tcl_GetChannelType(chan);
- if ((chanTypePtr == &fileChannelType) || (chanTypePtr == &tcpChannelType)
- || (strcmp(chanTypePtr->typeName, "pipe") == 0)) {
- if (Tcl_GetChannelHandle(chan,
- (forWriting ? TCL_WRITABLE : TCL_READABLE), (ClientData*) &fd)
- == TCL_OK) {
-
- /*
- * The call to fdopen below is probably dangerous, since it will
- * truncate an existing file if the file is being opened
- * for writing....
- */
-
- f = fdopen(fd, (forWriting ? "w" : "r"));
- if (f == NULL) {
- Tcl_AppendResult(interp, "cannot get a FILE * for \"", string,
- "\"", (char *) NULL);
- return TCL_ERROR;
- }
- *filePtr = (ClientData) f;
- return TCL_OK;
- }
- }
-
- Tcl_AppendResult(interp, "\"", string,
- "\" cannot be used to get a FILE *", (char *) NULL);
- return TCL_ERROR;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclUnixWaitForFile --
- *
- * This procedure waits synchronously for a file to become readable
- * or writable, with an optional timeout.
- *
- * Results:
- * The return value is an OR'ed combination of TCL_READABLE,
- * TCL_WRITABLE, and TCL_EXCEPTION, indicating the conditions
- * that are present on file at the time of the return. This
- * procedure will not return until either "timeout" milliseconds
- * have elapsed or at least one of the conditions given by mask
- * has occurred for file (a return value of 0 means that a timeout
- * occurred). No normal events will be serviced during the
- * execution of this procedure.
- *
- * Side effects:
- * Time passes.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TclUnixWaitForFile(fd, mask, timeout)
- int fd; /* Handle for file on which to wait. */
- int mask; /* What to wait for: OR'ed combination of
- * TCL_READABLE, TCL_WRITABLE, and
- * TCL_EXCEPTION. */
- int timeout; /* Maximum amount of time to wait for one
- * of the conditions in mask to occur, in
- * milliseconds. A value of 0 means don't
- * wait at all, and a value of -1 means
- * wait forever. */
- {
- Tcl_Time abortTime, now;
- struct timeval blockTime, *timeoutPtr;
- int index, bit, numFound, result = 0;
- static fd_mask readyMasks[3*MASK_SIZE];
- /* This array reflects the readable/writable
- * conditions that were found to exist by the
- * last call to select. */
-
- /*
- * If there is a non-zero finite timeout, compute the time when
- * we give up.
- */
-
- if (timeout > 0) {
- TclpGetTime(&now);
- abortTime.sec = now.sec + timeout/1000;
- abortTime.usec = now.usec + (timeout%1000)*1000;
- if (abortTime.usec >= 1000000) {
- abortTime.usec -= 1000000;
- abortTime.sec += 1;
- }
- timeoutPtr = &blockTime;
- } else if (timeout == 0) {
- timeoutPtr = &blockTime;
- blockTime.tv_sec = 0;
- blockTime.tv_usec = 0;
- } else {
- timeoutPtr = NULL;
- }
-
- /*
- * Initialize the ready masks and compute the mask offsets.
- */
-
- if (fd >= FD_SETSIZE) {
- panic("TclWaitForFile can't handle file id %d", fd);
- }
- memset((VOID *) readyMasks, 0, 3*MASK_SIZE*sizeof(fd_mask));
- index = fd/(NBBY*sizeof(fd_mask));
- bit = 1 << (fd%(NBBY*sizeof(fd_mask)));
-
- /*
- * Loop in a mini-event loop of our own, waiting for either the
- * file to become ready or a timeout to occur.
- */
-
- while (1) {
- if (timeout > 0) {
- blockTime.tv_sec = abortTime.sec - now.sec;
- blockTime.tv_usec = abortTime.usec - now.usec;
- if (blockTime.tv_usec < 0) {
- blockTime.tv_sec -= 1;
- blockTime.tv_usec += 1000000;
- }
- if (blockTime.tv_sec < 0) {
- blockTime.tv_sec = 0;
- blockTime.tv_usec = 0;
- }
- }
-
- /*
- * Set the appropriate bit in the ready masks for the fd.
- */
-
- if (mask & TCL_READABLE) {
- readyMasks[index] |= bit;
- }
- if (mask & TCL_WRITABLE) {
- (readyMasks+MASK_SIZE)[index] |= bit;
- }
- if (mask & TCL_EXCEPTION) {
- (readyMasks+2*(MASK_SIZE))[index] |= bit;
- }
-
- /*
- * Wait for the event or a timeout.
- */
-
- numFound = select(fd+1, (SELECT_MASK *) &readyMasks[0],
- (SELECT_MASK *) &readyMasks[MASK_SIZE],
- (SELECT_MASK *) &readyMasks[2*MASK_SIZE], timeoutPtr);
- if (numFound == 1) {
- if (readyMasks[index] & bit) {
- result |= TCL_READABLE;
- }
- if ((readyMasks+MASK_SIZE)[index] & bit) {
- result |= TCL_WRITABLE;
- }
- if ((readyMasks+2*(MASK_SIZE))[index] & bit) {
- result |= TCL_EXCEPTION;
- }
- result &= mask;
- if (result) {
- break;
- }
- }
- if (timeout == 0) {
- break;
- }
-
- /*
- * The select returned early, so we need to recompute the timeout.
- */
-
- TclpGetTime(&now);
- if ((abortTime.sec < now.sec)
- || ((abortTime.sec == now.sec)
- && (abortTime.usec <= now.usec))) {
- break;
- }
- }
- return result;
- }
-