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Diffstat (limited to 'unix/tclUnixChan.c')
| -rw-r--r-- | unix/tclUnixChan.c | 2695 |
1 files changed, 0 insertions, 2695 deletions
diff --git a/unix/tclUnixChan.c b/unix/tclUnixChan.c deleted file mode 100644 index 4da4f1f..0000000 --- a/unix/tclUnixChan.c +++ /dev/null @@ -1,2695 +0,0 @@ -/* - * tclUnixChan.c - * - * Common channel driver for Unix channels based on files, command - * pipes and TCP sockets. - * - * Copyright (c) 1995-1997 Sun Microsystems, Inc. - * Copyright (c) 1998-1999 by Scriptics Corporation. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclUnixChan.c,v 1.10 1999/04/16 00:48:04 stanton Exp $ - */ - -#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 - -#define SUPPORTS_TTY - -#ifdef USE_TERMIOS -# include <termios.h> -# define IOSTATE struct termios -# define GETIOSTATE(fd, statePtr) tcgetattr((fd), (statePtr)) -# define SETIOSTATE(fd, statePtr) tcsetattr((fd), TCSADRAIN, (statePtr)) -#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 */ - -/* - * 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; - -#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; - int parity; - int data; - int stop; -} TtyAttrs; - -#endif /* !SUPPORTS_TTY */ - -typedef struct ThreadSpecificData { - /* - * List of all file channels currently open. This is per thread and is - * used to match up fd's to channels, which rarely occurs. - */ - - FileState *firstFilePtr; -} ThreadSpecificData; - -static Tcl_ThreadDataKey dataKey; - -/* - * 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)); -#ifdef SUPPORTS_TTY -static int TtyCloseProc _ANSI_ARGS_((ClientData instanceData, - Tcl_Interp *interp)); -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 FileState * TtyInit _ANSI_ARGS_((int fd)); -static int TtyParseMode _ANSI_ARGS_((Tcl_Interp *interp, - CONST char *mode, int *speedPtr, int *parityPtr, - int *dataPtr, int *stopPtr)); -static void TtySetAttributes _ANSI_ARGS_((int fd, - TtyAttrs *ttyPtr)); -static int TtySetOptionProc _ANSI_ARGS_((ClientData instanceData, - Tcl_Interp *interp, char *optionName, - char *value)); -#endif /* SUPPORTS_TTY */ -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. */ -}; - -#ifdef SUPPORTS_TTY -/* - * 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.*/ - TtyCloseProc, /* 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. */ -}; -#endif /* SUPPORTS_TTY */ - -/* - * 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; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - Tcl_DeleteFileHandler(fsPtr->fd); - - /* - * Do not close standard channels while in thread-exit. - */ - - if (!TclInExit() - || ((fsPtr->fd != 0) && (fsPtr->fd != 1) && (fsPtr->fd != 2))) { - if (close(fsPtr->fd) < 0) { - errorCode = errno; - } - } - for (nextPtrPtr = &(tsdPtr->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_GetChannelHandle 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; - } -} - -#ifdef SUPPORTS_TTY - -/* - *---------------------------------------------------------------------- - * - * TtyCloseProc -- - * - * This procedure is called from the generic IO level to perform - * channel-type-specific cleanup when a tty based channel is closed. - * - * Results: - * 0 if successful, errno if failed. - * - * Side effects: - * Restores the settings and closes the device of the channel. - * - *---------------------------------------------------------------------- - */ - -static int -TtyCloseProc(instanceData, interp) - ClientData instanceData; /* Tty state. */ - Tcl_Interp *interp; /* For error reporting - unused. */ -{ - TtyState *ttyPtr; - - ttyPtr = (TtyState *) instanceData; - SETIOSTATE(ttyPtr->fs.fd, &ttyPtr->savedState); - return FileCloseProc(instanceData, interp); -} - -/* - *---------------------------------------------------------------------- - * - * TtySetOptionProc -- - * - * Sets an option on a channel. - * - * Results: - * A standard Tcl result. Also sets the interp's 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[3 * TCL_INTEGER_SPACE + 16]; - 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 */ - - -/* - *--------------------------------------------------------------------------- - * - * 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. */ -{ - 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; - case PARENB | PAREXT : parity = 's'; break; - case PARENB | PARODD | PAREXT : parity = 'm'; break; - } -#else /* !PAREXT */ - switch ((int) (iostate.c_cflag & (PARENB | PARODD))) { - 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; -} - -/* - *--------------------------------------------------------------------------- - * - * 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. */ -{ - 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') { - flag |= PARENB; -#ifdef PAREXT - iostate.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; - } - - iostate.c_cflag &= ~(PARENB | PARODD | CSIZE | CSTOPB); - iostate.c_cflag |= flag; - -#endif /* USE_TERMIOS */ - -#ifdef USE_TERMIO - int parity, data, flag; - - GETIOSTATE(fd, &iostate); - iostate.c_cflag &= ~CBAUD; - iostate.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; - } - - iostate.c_cflag &= ~(PARENB | PARODD | PAREXT | CSIZE | CSTOPB); - 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') { - iostate.sg_flags &= ~ODDP; - iostate.sg_flags |= EVENP; - } else if (parity == 'o') { - iostate.sg_flags &= ~EVENP; - 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(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; -} - -/* - *--------------------------------------------------------------------------- - * - * 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 to non-blocking raw mode, similar to - * sockets. All other modes can be simulated on top of this in Tcl. - * - *--------------------------------------------------------------------------- - */ - -static FileState * -TtyInit(fd) - int fd; /* Open file descriptor for serial port to - * be initialized. */ -{ - IOSTATE iostate; - TtyState *ttyPtr; - - ttyPtr = (TtyState *) ckalloc((unsigned) sizeof(TtyState)); - GETIOSTATE(fd, &ttyPtr->savedState); - - iostate = ttyPtr->savedState; - -#ifdef USE_TERMIOS - 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; -#endif /* USE_TERMIOS */ - -#ifdef USE_TERMIO - 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; -#endif /* USE_TERMIO */ - -#ifdef USE_SGTTY - iostate.sg_flags &= (EVENP | ODDP); - iostate.sg_flags |= RAW; -#endif /* USE_SGTTY */ - - SETIOSTATE(fd, &iostate); - - return &ttyPtr->fs; -} -#endif /* SUPPORTS_TTY */ - -/* - *---------------------------------------------------------------------- - * - * TclpOpenFileChannel -- - * - * 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 the interp's 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 -TclpOpenFileChannel(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 *native, *translation; - char channelName[16 + TCL_INTEGER_SPACE]; - Tcl_DString ds, buffer; - Tcl_ChannelType *channelTypePtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - 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("TclpOpenFileChannel: invalid mode value"); - return NULL; - } - - native = Tcl_TranslateFileName(interp, fileName, &buffer); - if (native == NULL) { - return NULL; - } - native = Tcl_UtfToExternalDString(NULL, native, -1, &ds); - fd = open(native, mode, permissions); /* INTL: Native. */ - Tcl_DStringFree(&ds); - 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); - -#ifdef SUPPORTS_TTY - 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. - */ - - translation = "auto crlf"; - channelTypePtr = &ttyChannelType; - fsPtr = TtyInit(fd); - } else -#endif /* SUPPORTS_TTY */ - { - translation = NULL; - channelTypePtr = &fileChannelType; - fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState)); - } - - fsPtr->nextPtr = tsdPtr->firstFilePtr; - tsdPtr->firstFilePtr = fsPtr; - fsPtr->validMask = channelPermissions | TCL_EXCEPTION; - fsPtr->fd = fd; - - 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 (translation != NULL) { - /* - * 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", - translation) != 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[16 + TCL_INTEGER_SPACE]; - int fd = (int) handle; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - 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 = tsdPtr->firstFilePtr; fsPtr != NULL; fsPtr = fsPtr->nextPtr) { - if (fsPtr->fd == fd) { - return ((mode|TCL_EXCEPTION) == fsPtr->validMask) ? - fsPtr->channel : NULL; - } - } - - fsPtr = (FileState *) ckalloc((unsigned) sizeof(FileState)); - fsPtr->nextPtr = tsdPtr->firstFilePtr; - tsdPtr->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[TCL_INTEGER_SPACE]; - - if (optionName != (char *) NULL) { - len = strlen(optionName); - } - - if ((len > 1) && (optionName[1] == 'e') && - (strncmp(optionName, "-error", len) == 0)) { - int optlen; - int err, ret; - - optlen = sizeof(int); - ret = getsockopt(statePtr->fd, SOL_SOCKET, SO_ERROR, - (char *)&err, &optlen); - if (ret < 0) { - err = errno; - } - if (err != 0) { - Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(err), -1); - } - return TCL_OK; - } - - 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( /* INTL: Native. */ - (char *) &peername.sin_addr, - sizeof(peername.sin_addr), AF_INET); - if (hostEntPtr != NULL) { - Tcl_DString ds; - - Tcl_ExternalToUtfDString(NULL, hostEntPtr->h_name, -1, &ds); - Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds)); - } else { - Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr)); - } - TclFormatInt(buf, 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( /* INTL: Native. */ - (char *) &sockname.sin_addr, - sizeof(sockname.sin_addr), AF_INET); - if (hostEntPtr != (struct hostent *) NULL) { - Tcl_DString ds; - - Tcl_ExternalToUtfDString(NULL, hostEntPtr->h_name, -1, &ds); - Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds)); - } else { - Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr)); - } - TclFormatInt(buf, 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; - - /* - * Make sure we don't mess with server sockets since they will never - * be readable or writable at the Tcl level. This keeps Tcl scripts - * from interfering with the -accept behavior. - */ - - if (!statePtr->acceptProc) { - if (mask) { - Tcl_CreateFileHandler(statePtr->fd, mask, - (Tcl_FileProc *) Tcl_NotifyChannel, - (ClientData) statePtr->channel); - } else { - Tcl_DeleteFileHandler(statePtr->fd); - } - } -} - -/* - *---------------------------------------------------------------------- - * - * TcpGetHandleProc -- - * - * Called from Tcl_GetChannelHandle 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 the interp's - * 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 { - Tcl_DString ds; - CONST char *native; - - if (host == NULL) { - native = NULL; - } else { - native = Tcl_UtfToExternalDString(NULL, host, -1, &ds); - } - addr.s_addr = inet_addr(native); /* INTL: Native. */ - if (addr.s_addr == -1) { - hostent = gethostbyname(native); /* INTL: Native. */ - 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 - if (native != NULL) { - Tcl_DStringFree(&ds); - } - return 0; /* error */ - } - } - if (native != NULL) { - Tcl_DStringFree(&ds); - } - } - - /* - * 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[16 + TCL_INTEGER_SPACE]; - - /* - * 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[16 + TCL_INTEGER_SPACE]; - - 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 the interp's 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[16 + TCL_INTEGER_SPACE]; - - /* - * 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[16 + TCL_INTEGER_SPACE]; - - 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 = NULL; - newSockState->acceptProcData = NULL; - - sprintf(channelName, "sock%d", newsock); - newSockState->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) newSockState, (TCL_READABLE | TCL_WRITABLE)); - - Tcl_SetChannelOption(NULL, newSockState->channel, "-translation", - "auto crlf"); - - if (sockState->acceptProc != NULL) { - (*sockState->acceptProc)(sockState->acceptProcData, - newSockState->channel, inet_ntoa(addr.sin_addr), - ntohs(addr.sin_port)); - } -} - -/* - *---------------------------------------------------------------------- - * - * TclpGetDefaultStdChannel -- - * - * 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 -TclpGetDefaultStdChannel(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); - if (channel == NULL) { - return NULL; - } - - /* - * 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 the interp's 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; - ClientData data; - 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) -#ifdef SUPPORTS_TTY - || (chanTypePtr == &ttyChannelType) -#endif /* SUPPORTS_TTY */ - || (chanTypePtr == &tcpChannelType) - || (strcmp(chanTypePtr->typeName, "pipe") == 0)) { - if (Tcl_GetChannelHandle(chan, - (forWriting ? TCL_WRITABLE : TCL_READABLE), - (ClientData*) &data) == TCL_OK) { - fd = (int) data; - - /* - * 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; - 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; -} |