diff options
Diffstat (limited to 'tcl8.6/unix/tclUnixChan.c')
| -rw-r--r-- | tcl8.6/unix/tclUnixChan.c | 1937 |
1 files changed, 0 insertions, 1937 deletions
diff --git a/tcl8.6/unix/tclUnixChan.c b/tcl8.6/unix/tclUnixChan.c deleted file mode 100644 index b4b2739..0000000 --- a/tcl8.6/unix/tclUnixChan.c +++ /dev/null @@ -1,1937 +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. - */ - -#include "tclInt.h" /* Internal definitions for Tcl. */ -#include "tclIO.h" /* To get Channel type declaration. */ - -#undef SUPPORTS_TTY -#if defined(HAVE_TERMIOS_H) -# define SUPPORTS_TTY 1 -# include <termios.h> -# ifdef HAVE_SYS_IOCTL_H -# include <sys/ioctl.h> -# endif /* HAVE_SYS_IOCTL_H */ -# ifdef HAVE_SYS_MODEM_H -# include <sys/modem.h> -# endif /* HAVE_SYS_MODEM_H */ - -# ifdef FIONREAD -# define GETREADQUEUE(fd, int) ioctl((fd), FIONREAD, &(int)) -# elif defined(FIORDCHK) -# define GETREADQUEUE(fd, int) int = ioctl((fd), FIORDCHK, NULL) -# else -# define GETREADQUEUE(fd, int) int = 0 -# endif - -# ifdef TIOCOUTQ -# define GETWRITEQUEUE(fd, int) ioctl((fd), TIOCOUTQ, &(int)) -# else -# define GETWRITEQUEUE(fd, int) int = 0 -# endif - -# if !defined(CRTSCTS) && defined(CNEW_RTSCTS) -# define CRTSCTS CNEW_RTSCTS -# endif /* !CRTSCTS&CNEW_RTSCTS */ -# if !defined(PAREXT) && defined(CMSPAR) -# define PAREXT CMSPAR -# endif /* !PAREXT&&CMSPAR */ - -#endif /* HAVE_TERMIOS_H */ - -/* - * Helper macros to make parts of this file clearer. The macros do exactly - * what they say on the tin. :-) They also only ever refer to their arguments - * once, and so can be used without regard to side effects. - */ - -#define SET_BITS(var, bits) ((var) |= (bits)) -#define CLEAR_BITS(var, bits) ((var) &= ~(bits)) - -/* - * 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. */ -} FileState; - -#ifdef SUPPORTS_TTY - -/* - * 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 */ - -#define UNSUPPORTED_OPTION(detail) \ - if (interp) { \ - Tcl_SetObjResult(interp, Tcl_ObjPrintf( \ - "%s not supported for this platform", (detail))); \ - Tcl_SetErrorCode(interp, "TCL", "UNSUPPORTED", NULL); \ - } - -/* - * Static routines for this file: - */ - -static int FileBlockModeProc(ClientData instanceData, int mode); -static int FileCloseProc(ClientData instanceData, - Tcl_Interp *interp); -static int FileGetHandleProc(ClientData instanceData, - int direction, ClientData *handlePtr); -static int FileInputProc(ClientData instanceData, char *buf, - int toRead, int *errorCode); -static int FileOutputProc(ClientData instanceData, - const char *buf, int toWrite, int *errorCode); -static int FileSeekProc(ClientData instanceData, long offset, - int mode, int *errorCode); -static int FileTruncateProc(ClientData instanceData, - Tcl_WideInt length); -static Tcl_WideInt FileWideSeekProc(ClientData instanceData, - Tcl_WideInt offset, int mode, int *errorCode); -static void FileWatchProc(ClientData instanceData, int mask); -#ifdef SUPPORTS_TTY -static void TtyGetAttributes(int fd, TtyAttrs *ttyPtr); -static int TtyGetOptionProc(ClientData instanceData, - Tcl_Interp *interp, const char *optionName, - Tcl_DString *dsPtr); -static int TtyGetBaud(speed_t speed); -static speed_t TtyGetSpeed(int baud); -static void TtyInit(int fd); -static void TtyModemStatusStr(int status, Tcl_DString *dsPtr); -static int TtyParseMode(Tcl_Interp *interp, const char *mode, - TtyAttrs *ttyPtr); -static void TtySetAttributes(int fd, TtyAttrs *ttyPtr); -static int TtySetOptionProc(ClientData instanceData, - Tcl_Interp *interp, const char *optionName, - const char *value); -#endif /* SUPPORTS_TTY */ - -/* - * This structure describes the channel type structure for file based IO: - */ - -static const Tcl_ChannelType fileChannelType = { - "file", /* Type name. */ - TCL_CHANNEL_VERSION_5, /* v5 channel */ - 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. */ - NULL, /* close2proc. */ - FileBlockModeProc, /* Set blocking or non-blocking mode.*/ - NULL, /* flush proc. */ - NULL, /* handler proc. */ - FileWideSeekProc, /* wide seek proc. */ - NULL, - FileTruncateProc /* truncate proc. */ -}; - -#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 const Tcl_ChannelType ttyChannelType = { - "tty", /* Type name. */ - TCL_CHANNEL_VERSION_5, /* v5 channel */ - 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. */ - NULL, /* close2proc. */ - FileBlockModeProc, /* Set blocking or non-blocking mode.*/ - NULL, /* flush proc. */ - NULL, /* handler proc. */ - NULL, /* wide seek proc. */ - NULL, /* thread action proc. */ - NULL /* truncate proc. */ -}; -#endif /* SUPPORTS_TTY */ - -/* - *---------------------------------------------------------------------- - * - * FileBlockModeProc -- - * - * Helper function 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( - ClientData instanceData, /* File state. */ - int mode) /* The mode to set. Can be TCL_MODE_BLOCKING - * or TCL_MODE_NONBLOCKING. */ -{ - FileState *fsPtr = instanceData; - - if (TclUnixSetBlockingMode(fsPtr->fd, mode) < 0) { - return errno; - } - - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * FileInputProc -- - * - * This function 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( - 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 = 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 function 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( - ClientData instanceData, /* File state. */ - const char *buf, /* The data buffer. */ - int toWrite, /* How many bytes to write? */ - int *errorCodePtr) /* Where to store error code. */ -{ - FileState *fsPtr = instanceData; - int written; - - *errorCodePtr = 0; - - if (toWrite == 0) { - /* - * SF Tcl Bug 465765. Do not try to write nothing into a file. STREAM - * based implementations will considers this as EOF (if there is a - * pipe behind the file). - */ - - return 0; - } - written = write(fsPtr->fd, buf, (size_t) toWrite); - if (written > -1) { - return written; - } - *errorCodePtr = errno; - return -1; -} - -/* - *---------------------------------------------------------------------- - * - * FileCloseProc -- - * - * This function 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( - ClientData instanceData, /* File state. */ - Tcl_Interp *interp) /* For error reporting - unused. */ -{ - FileState *fsPtr = instanceData; - int errorCode = 0; - - Tcl_DeleteFileHandler(fsPtr->fd); - - /* - * Do not close standard channels while in thread-exit. - */ - - if (!TclInThreadExit() - || ((fsPtr->fd != 0) && (fsPtr->fd != 1) && (fsPtr->fd != 2))) { - if (close(fsPtr->fd) < 0) { - errorCode = errno; - } - } - ckfree(fsPtr); - return errorCode; -} - -/* - *---------------------------------------------------------------------- - * - * FileSeekProc -- - * - * This function 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( - 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 = instanceData; - Tcl_WideInt oldLoc, newLoc; - - /* - * Save our current place in case we need to roll-back the seek. - */ - - oldLoc = TclOSseek(fsPtr->fd, (Tcl_SeekOffset) 0, SEEK_CUR); - if (oldLoc == Tcl_LongAsWide(-1)) { - /* - * Bad things are happening. Error out... - */ - - *errorCodePtr = errno; - return -1; - } - - newLoc = TclOSseek(fsPtr->fd, (Tcl_SeekOffset) offset, mode); - - /* - * Check for expressability in our return type, and roll-back otherwise. - */ - - if (newLoc > Tcl_LongAsWide(INT_MAX)) { - *errorCodePtr = EOVERFLOW; - TclOSseek(fsPtr->fd, (Tcl_SeekOffset) oldLoc, SEEK_SET); - return -1; - } else { - *errorCodePtr = (newLoc == Tcl_LongAsWide(-1)) ? errno : 0; - } - return (int) Tcl_WideAsLong(newLoc); -} - -/* - *---------------------------------------------------------------------- - * - * FileWideSeekProc -- - * - * This function is called by the generic IO level to move the access - * point in a file based channel, with offsets expressed as wide - * integers. - * - * 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 Tcl_WideInt -FileWideSeekProc( - ClientData instanceData, /* File state. */ - Tcl_WideInt offset, /* Offset to seek to. */ - int mode, /* Relative to where should we seek? Can be - * one of SEEK_START, SEEK_CUR or SEEK_END. */ - int *errorCodePtr) /* To store error code. */ -{ - FileState *fsPtr = instanceData; - Tcl_WideInt newLoc; - - newLoc = TclOSseek(fsPtr->fd, (Tcl_SeekOffset) 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( - ClientData instanceData, /* The file state. */ - int mask) /* Events of interest; an OR-ed combination of - * TCL_READABLE, TCL_WRITABLE and - * TCL_EXCEPTION. */ -{ - FileState *fsPtr = 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, 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( - ClientData instanceData, /* The file state. */ - int direction, /* TCL_READABLE or TCL_WRITABLE */ - ClientData *handlePtr) /* Where to store the handle. */ -{ - FileState *fsPtr = instanceData; - - if (direction & fsPtr->validMask) { - *handlePtr = INT2PTR(fsPtr->fd); - return TCL_OK; - } - return TCL_ERROR; -} - -#ifdef SUPPORTS_TTY -/* - *---------------------------------------------------------------------- - * - * TtyModemStatusStr -- - * - * Converts a RS232 modem status list of readable flags - * - *---------------------------------------------------------------------- - */ - -static void -TtyModemStatusStr( - int status, /* RS232 modem status */ - Tcl_DString *dsPtr) /* Where to store string */ -{ -#ifdef TIOCM_CTS - Tcl_DStringAppendElement(dsPtr, "CTS"); - Tcl_DStringAppendElement(dsPtr, (status & TIOCM_CTS) ? "1" : "0"); -#endif /* TIOCM_CTS */ -#ifdef TIOCM_DSR - Tcl_DStringAppendElement(dsPtr, "DSR"); - Tcl_DStringAppendElement(dsPtr, (status & TIOCM_DSR) ? "1" : "0"); -#endif /* TIOCM_DSR */ -#ifdef TIOCM_RNG - Tcl_DStringAppendElement(dsPtr, "RING"); - Tcl_DStringAppendElement(dsPtr, (status & TIOCM_RNG) ? "1" : "0"); -#endif /* TIOCM_RNG */ -#ifdef TIOCM_CD - Tcl_DStringAppendElement(dsPtr, "DCD"); - Tcl_DStringAppendElement(dsPtr, (status & TIOCM_CD) ? "1" : "0"); -#endif /* TIOCM_CD */ -} - -/* - *---------------------------------------------------------------------- - * - * 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( - ClientData instanceData, /* File state. */ - Tcl_Interp *interp, /* For error reporting - can be NULL. */ - const char *optionName, /* Which option to set? */ - const char *value) /* New value for option. */ -{ - FileState *fsPtr = instanceData; - unsigned int len, vlen; - TtyAttrs tty; - int argc; - const char **argv; - struct termios iostate; - - len = strlen(optionName); - vlen = strlen(value); - - /* - * Option -mode baud,parity,databits,stopbits - */ - - if ((len > 2) && (strncmp(optionName, "-mode", len) == 0)) { - if (TtyParseMode(interp, value, &tty) != TCL_OK) { - return TCL_ERROR; - } - - /* - * system calls results should be checked there. - dl - */ - - TtySetAttributes(fsPtr->fd, &tty); - return TCL_OK; - } - - - /* - * Option -handshake none|xonxoff|rtscts|dtrdsr - */ - - if ((len > 1) && (strncmp(optionName, "-handshake", len) == 0)) { - /* - * Reset all handshake options. DTR and RTS are ON by default. - */ - - tcgetattr(fsPtr->fd, &iostate); - CLEAR_BITS(iostate.c_iflag, IXON | IXOFF | IXANY); -#ifdef CRTSCTS - CLEAR_BITS(iostate.c_cflag, CRTSCTS); -#endif /* CRTSCTS */ - if (Tcl_UtfNcasecmp(value, "NONE", vlen) == 0) { - /* - * Leave all handshake options disabled. - */ - } else if (Tcl_UtfNcasecmp(value, "XONXOFF", vlen) == 0) { - SET_BITS(iostate.c_iflag, IXON | IXOFF | IXANY); - } else if (Tcl_UtfNcasecmp(value, "RTSCTS", vlen) == 0) { -#ifdef CRTSCTS - SET_BITS(iostate.c_cflag, CRTSCTS); -#else /* !CRTSTS */ - UNSUPPORTED_OPTION("-handshake RTSCTS"); - return TCL_ERROR; -#endif /* CRTSCTS */ - } else if (Tcl_UtfNcasecmp(value, "DTRDSR", vlen) == 0) { - UNSUPPORTED_OPTION("-handshake DTRDSR"); - return TCL_ERROR; - } else { - if (interp) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "bad value for -handshake: must be one of" - " xonxoff, rtscts, dtrdsr or none", -1)); - Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE", - "VALUE", NULL); - } - return TCL_ERROR; - } - tcsetattr(fsPtr->fd, TCSADRAIN, &iostate); - return TCL_OK; - } - - /* - * Option -xchar {\x11 \x13} - */ - - if ((len > 1) && (strncmp(optionName, "-xchar", len) == 0)) { - Tcl_DString ds; - - if (Tcl_SplitList(interp, value, &argc, &argv) == TCL_ERROR) { - return TCL_ERROR; - } else if (argc != 2) { - if (interp) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "bad value for -xchar: should be a list of" - " two elements", -1)); - Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE", - "VALUE", NULL); - } - ckfree(argv); - return TCL_ERROR; - } - - tcgetattr(fsPtr->fd, &iostate); - - Tcl_UtfToExternalDString(NULL, argv[0], -1, &ds); - iostate.c_cc[VSTART] = *(const cc_t *) Tcl_DStringValue(&ds); - TclDStringClear(&ds); - - Tcl_UtfToExternalDString(NULL, argv[1], -1, &ds); - iostate.c_cc[VSTOP] = *(const cc_t *) Tcl_DStringValue(&ds); - Tcl_DStringFree(&ds); - ckfree(argv); - - tcsetattr(fsPtr->fd, TCSADRAIN, &iostate); - return TCL_OK; - } - - /* - * Option -timeout msec - */ - - if ((len > 2) && (strncmp(optionName, "-timeout", len) == 0)) { - int msec; - - tcgetattr(fsPtr->fd, &iostate); - if (Tcl_GetInt(interp, value, &msec) != TCL_OK) { - return TCL_ERROR; - } - iostate.c_cc[VMIN] = 0; - iostate.c_cc[VTIME] = (msec==0) ? 0 : (msec<100) ? 1 : (msec+50)/100; - tcsetattr(fsPtr->fd, TCSADRAIN, &iostate); - return TCL_OK; - } - - /* - * Option -ttycontrol {DTR 1 RTS 0 BREAK 0} - */ - if ((len > 4) && (strncmp(optionName, "-ttycontrol", len) == 0)) { -#if defined(TIOCMGET) && defined(TIOCMSET) - int i, control, flag; - - if (Tcl_SplitList(interp, value, &argc, &argv) == TCL_ERROR) { - return TCL_ERROR; - } - if ((argc % 2) == 1) { - if (interp) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "bad value for -ttycontrol: should be a list of" - " signal,value pairs", -1)); - Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE", - "VALUE", NULL); - } - ckfree(argv); - return TCL_ERROR; - } - - ioctl(fsPtr->fd, TIOCMGET, &control); - for (i = 0; i < argc-1; i += 2) { - if (Tcl_GetBoolean(interp, argv[i+1], &flag) == TCL_ERROR) { - ckfree(argv); - return TCL_ERROR; - } - if (Tcl_UtfNcasecmp(argv[i], "DTR", strlen(argv[i])) == 0) { - if (flag) { - SET_BITS(control, TIOCM_DTR); - } else { - CLEAR_BITS(control, TIOCM_DTR); - } - } else if (Tcl_UtfNcasecmp(argv[i], "RTS", strlen(argv[i])) == 0) { - if (flag) { - SET_BITS(control, TIOCM_RTS); - } else { - CLEAR_BITS(control, TIOCM_RTS); - } - } else if (Tcl_UtfNcasecmp(argv[i], "BREAK", strlen(argv[i])) == 0) { -#if defined(TIOCSBRK) && defined(TIOCCBRK) - if (flag) { - ioctl(fsPtr->fd, TIOCSBRK, NULL); - } else { - ioctl(fsPtr->fd, TIOCCBRK, NULL); - } -#else /* TIOCSBRK & TIOCCBRK */ - UNSUPPORTED_OPTION("-ttycontrol BREAK"); - ckfree(argv); - return TCL_ERROR; -#endif /* TIOCSBRK & TIOCCBRK */ - } else { - if (interp) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "bad signal \"%s\" for -ttycontrol: must be" - " DTR, RTS or BREAK", argv[i])); - Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FCONFIGURE", - "VALUE", NULL); - } - ckfree(argv); - return TCL_ERROR; - } - } /* -ttycontrol options loop */ - - ioctl(fsPtr->fd, TIOCMSET, &control); - ckfree(argv); - return TCL_OK; -#else /* TIOCMGET&TIOCMSET */ - UNSUPPORTED_OPTION("-ttycontrol"); -#endif /* TIOCMGET&TIOCMSET */ - } - - return Tcl_BadChannelOption(interp, optionName, - "mode handshake timeout ttycontrol xchar"); -} - -/* - *---------------------------------------------------------------------- - * - * 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. Sets error message if needed - * (by calling Tcl_BadChannelOption). - * - *---------------------------------------------------------------------- - */ - -static int -TtyGetOptionProc( - ClientData instanceData, /* File state. */ - Tcl_Interp *interp, /* For error reporting - can be NULL. */ - const char *optionName, /* Option to get. */ - Tcl_DString *dsPtr) /* Where to store value(s). */ -{ - FileState *fsPtr = instanceData; - unsigned int len; - char buf[3*TCL_INTEGER_SPACE + 16]; - int valid = 0; /* Flag if valid option parsed. */ - - if (optionName == NULL) { - len = 0; - } else { - len = strlen(optionName); - } - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-mode"); - } - if (len==0 || (len>2 && strncmp(optionName, "-mode", len)==0)) { - TtyAttrs tty; - - valid = 1; - TtyGetAttributes(fsPtr->fd, &tty); - sprintf(buf, "%d,%c,%d,%d", tty.baud, tty.parity, tty.data, tty.stop); - Tcl_DStringAppendElement(dsPtr, buf); - } - - /* - * Get option -xchar - */ - - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-xchar"); - Tcl_DStringStartSublist(dsPtr); - } - if (len==0 || (len>1 && strncmp(optionName, "-xchar", len)==0)) { - struct termios iostate; - Tcl_DString ds; - - valid = 1; - tcgetattr(fsPtr->fd, &iostate); - Tcl_DStringInit(&ds); - - Tcl_ExternalToUtfDString(NULL, (char *) &iostate.c_cc[VSTART], 1, &ds); - Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds)); - TclDStringClear(&ds); - - Tcl_ExternalToUtfDString(NULL, (char *) &iostate.c_cc[VSTOP], 1, &ds); - Tcl_DStringAppendElement(dsPtr, Tcl_DStringValue(&ds)); - Tcl_DStringFree(&ds); - } - if (len == 0) { - Tcl_DStringEndSublist(dsPtr); - } - - /* - * Get option -queue - * Option is readonly and returned by [fconfigure chan -queue] but not - * returned by unnamed [fconfigure chan]. - */ - - if ((len > 1) && (strncmp(optionName, "-queue", len) == 0)) { - int inQueue=0, outQueue=0, inBuffered, outBuffered; - - valid = 1; - GETREADQUEUE(fsPtr->fd, inQueue); - GETWRITEQUEUE(fsPtr->fd, outQueue); - inBuffered = Tcl_InputBuffered(fsPtr->channel); - outBuffered = Tcl_OutputBuffered(fsPtr->channel); - - sprintf(buf, "%d", inBuffered+inQueue); - Tcl_DStringAppendElement(dsPtr, buf); - sprintf(buf, "%d", outBuffered+outQueue); - Tcl_DStringAppendElement(dsPtr, buf); - } - -#if defined(TIOCMGET) - /* - * Get option -ttystatus - * Option is readonly and returned by [fconfigure chan -ttystatus] but not - * returned by unnamed [fconfigure chan]. - */ - if ((len > 4) && (strncmp(optionName, "-ttystatus", len) == 0)) { - int status; - - valid = 1; - ioctl(fsPtr->fd, TIOCMGET, &status); - TtyModemStatusStr(status, dsPtr); - } -#endif /* TIOCMGET */ - - if (valid) { - return TCL_OK; - } - return Tcl_BadChannelOption(interp, optionName, "mode" - " queue ttystatus xchar" - ); -} - - -static const struct {int baud; speed_t 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 -#ifdef B500000 - {500000, B500000}, -#endif -#ifdef B576000 - {576000, B576000}, -#endif -#ifdef B921600 - {921600, B921600}, -#endif -#ifdef B1000000 - {1000000, B1000000}, -#endif -#ifdef B1152000 - {1152000, B1152000}, -#endif -#ifdef B1500000 - {1500000,B1500000}, -#endif -#ifdef B2000000 - {2000000, B2000000}, -#endif -#ifdef B2500000 - {2500000,B2500000}, -#endif -#ifdef B3000000 - {3000000,B3000000}, -#endif -#ifdef B3500000 - {3500000,B3500000}, -#endif -#ifdef B4000000 - {4000000,B4000000}, -#endif - {-1, 0} -}; - -/* - *--------------------------------------------------------------------------- - * - * TtyGetSpeed -- - * - * Given an integer baud rate, get the speed_t value that should be - * used to select that baud rate. - * - * Results: - * As above. - * - *--------------------------------------------------------------------------- - */ - -static speed_t -TtyGetSpeed( - 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 -- - * - * Return the integer baud rate corresponding to a given speed_t value. - * - * Results: - * As above. If the mask value was not recognized, 0 is returned. - * - *--------------------------------------------------------------------------- - */ - -static int -TtyGetBaud( - speed_t 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; -} - -/* - *--------------------------------------------------------------------------- - * - * TtyGetAttributes -- - * - * Get the current attributes of the specified serial device. - * - * Results: - * None. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -static void -TtyGetAttributes( - int fd, /* Open file descriptor for serial port to be - * queried. */ - TtyAttrs *ttyPtr) /* Buffer filled with serial port - * attributes. */ -{ - struct termios iostate; - int baud, parity, data, stop; - - tcgetattr(fd, &iostate); - - 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; - - 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( - int fd, /* Open file descriptor for serial port to be - * modified. */ - TtyAttrs *ttyPtr) /* Buffer containing new attributes for serial - * port. */ -{ - struct termios iostate; - int parity, data, flag; - - tcgetattr(fd, &iostate); - cfsetospeed(&iostate, TtyGetSpeed(ttyPtr->baud)); - cfsetispeed(&iostate, TtyGetSpeed(ttyPtr->baud)); - - flag = 0; - parity = ttyPtr->parity; - if (parity != 'n') { - SET_BITS(flag, PARENB); -#ifdef PAREXT - CLEAR_BITS(iostate.c_cflag, PAREXT); - if ((parity == 'm') || (parity == 's')) { - SET_BITS(flag, PAREXT); - } -#endif /* PAREXT */ - if ((parity == 'm') || (parity == 'o')) { - SET_BITS(flag, PARODD); - } - } - data = ttyPtr->data; - SET_BITS(flag, - (data == 5) ? CS5 : - (data == 6) ? CS6 : - (data == 7) ? CS7 : CS8); - if (ttyPtr->stop == 2) { - SET_BITS(flag, CSTOPB); - } - - CLEAR_BITS(iostate.c_cflag, PARENB | PARODD | CSIZE | CSTOPB); - SET_BITS(iostate.c_cflag, flag); - - tcsetattr(fd, TCSADRAIN, &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). - * - *--------------------------------------------------------------------------- - */ - -static int -TtyParseMode( - Tcl_Interp *interp, /* If non-NULL, interp for error return. */ - const char *mode, /* Mode string to be parsed. */ - TtyAttrs *ttyPtr) /* Filled with data from mode string */ -{ - int i, end; - char parity; - const char *bad = "bad value for -mode"; - - i = sscanf(mode, "%d,%c,%d,%d%n", - &ttyPtr->baud, - &parity, - &ttyPtr->data, - &ttyPtr->stop, &end); - if ((i != 4) || (mode[end] != '\0')) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "%s: should be baud,parity,data,stop", bad)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL); - } - return TCL_ERROR; - } - - /* - * Only allow setting mark/space parity on platforms that support it Make - * sure to allow for the case where strchr is a macro. [Bug: 5089] - * - * We cannot if/else/endif the strchr arguments, it has to be the whole - * function. On AIX this function is apparently a macro, and macros do - * not allow pre-processor directives in their arguments. - */ - - if ( -#if defined(PAREXT) - strchr("noems", parity) -#else - strchr("noe", parity) -#endif /* PAREXT */ - == NULL) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "%s parity: should be %s", bad, -#if defined(PAREXT) - "n, o, e, m, or s" -#else - "n, o, or e" -#endif /* PAREXT */ - )); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL); - } - return TCL_ERROR; - } - ttyPtr->parity = parity; - if ((ttyPtr->data < 5) || (ttyPtr->data > 8)) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "%s data: should be 5, 6, 7, or 8", bad)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL); - } - return TCL_ERROR; - } - if ((ttyPtr->stop < 0) || (ttyPtr->stop > 2)) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "%s stop: should be 1 or 2", bad)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "SERIALMODE", NULL); - } - return TCL_ERROR; - } - return TCL_OK; -} - -/* - *--------------------------------------------------------------------------- - * - * TtyInit -- - * - * Given file descriptor that refers to a serial port, initialize the - * serial port to a set of sane values so that Tcl can talk to a device - * located on the serial port. - * - * 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 void -TtyInit( - int fd) /* Open file descriptor for serial port to be initialized. */ -{ - struct termios iostate; - tcgetattr(fd, &iostate); - - if (iostate.c_iflag != IGNBRK - || iostate.c_oflag != 0 - || iostate.c_lflag != 0 - || iostate.c_cflag & CREAD - || iostate.c_cc[VMIN] != 1 - || iostate.c_cc[VTIME] != 0) - { - 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; - - tcsetattr(fd, TCSADRAIN, &iostate); - } -} -#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( - Tcl_Interp *interp, /* Interpreter for error reporting; can be - * NULL. */ - Tcl_Obj *pathPtr, /* Name of file to open. */ - int mode, /* POSIX open mode. */ - int permissions) /* If the open involves creating a file, with - * what modes to create it? */ -{ - int fd, channelPermissions; - FileState *fsPtr; - const char *native, *translation; - char channelName[16 + TCL_INTEGER_SPACE]; - const Tcl_ChannelType *channelTypePtr; - - 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. - */ - - Tcl_Panic("TclpOpenFileChannel: invalid mode value"); - return NULL; - } - - native = Tcl_FSGetNativePath(pathPtr); - if (native == NULL) { - if (interp != (Tcl_Interp *) NULL) { - Tcl_AppendResult(interp, "couldn't open \"", - TclGetString(pathPtr), "\": filename is invalid on this platform", - NULL); - } - return NULL; - } - -#ifdef DJGPP - SET_BITS(mode, O_BINARY); -#endif - - fd = TclOSopen(native, mode, permissions); - - if (fd < 0) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't open \"%s\": %s", - TclGetString(pathPtr), Tcl_PosixError(interp))); - } - 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 (strcmp(native, "/dev/tty") != 0 && 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. - * - * Note that we do not do this if we're dealing with /dev/tty itself, - * as that tends to cause Bad Things To Happen when you're working - * interactively. Strictly a better check would be to see if the FD - * being set up is a device and has the same major/minor as the - * initial std FDs (beware reopening!) but that's nearly as messy. - */ - - translation = "auto crlf"; - channelTypePtr = &ttyChannelType; - TtyInit(fd); - } else -#endif /* SUPPORTS_TTY */ - { - translation = NULL; - channelTypePtr = &fileChannelType; - } - - fsPtr = ckalloc(sizeof(FileState)); - fsPtr->validMask = channelPermissions | TCL_EXCEPTION; - fsPtr->fd = fd; - - fsPtr->channel = Tcl_CreateChannel(channelTypePtr, channelName, - fsPtr, channelPermissions); - - if (translation != NULL) { - /* - * 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( - 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 = PTR2INT(handle); - const Tcl_ChannelType *channelTypePtr; - struct sockaddr sockaddr; - socklen_t sockaddrLen = sizeof(sockaddr); - - if (mode == 0) { - return NULL; - } - - sockaddr.sa_family = AF_UNSPEC; - -#ifdef SUPPORTS_TTY - if (isatty(fd)) { - channelTypePtr = &ttyChannelType; - sprintf(channelName, "serial%d", fd); - } else -#endif /* SUPPORTS_TTY */ - if ((getsockname(fd, (struct sockaddr *)&sockaddr, &sockaddrLen) == 0) - && (sockaddrLen > 0) - && (sockaddr.sa_family == AF_INET || sockaddr.sa_family == AF_INET6)) { - return TclpMakeTcpClientChannelMode(INT2PTR(fd), mode); - } else { - channelTypePtr = &fileChannelType; - sprintf(channelName, "file%d", fd); - } - - fsPtr = ckalloc(sizeof(FileState)); - fsPtr->fd = fd; - fsPtr->validMask = mode | TCL_EXCEPTION; - fsPtr->channel = Tcl_CreateChannel(channelTypePtr, channelName, - fsPtr, mode); - - return fsPtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * 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( - 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). */ - const char *bufMode = NULL; - - /* - * Some #def's to make the code a little clearer! - */ - -#define ZERO_OFFSET ((Tcl_SeekOffset) 0) -#define ERROR_OFFSET ((Tcl_SeekOffset) -1) - - switch (type) { - case TCL_STDIN: - if ((TclOSseek(0, ZERO_OFFSET, SEEK_CUR) == ERROR_OFFSET) - && (errno == EBADF)) { - return NULL; - } - fd = 0; - mode = TCL_READABLE; - bufMode = "line"; - break; - case TCL_STDOUT: - if ((TclOSseek(1, ZERO_OFFSET, SEEK_CUR) == ERROR_OFFSET) - && (errno == EBADF)) { - return NULL; - } - fd = 1; - mode = TCL_WRITABLE; - bufMode = "line"; - break; - case TCL_STDERR: - if ((TclOSseek(2, ZERO_OFFSET, SEEK_CUR) == ERROR_OFFSET) - && (errno == EBADF)) { - return NULL; - } - fd = 2; - mode = TCL_WRITABLE; - bufMode = "none"; - break; - default: - Tcl_Panic("TclGetDefaultStdChannel: Unexpected channel type"); - break; - } - -#undef ZERO_OFFSET -#undef ERROR_OFFSET - - channel = Tcl_MakeFileChannel(INT2PTR(fd), mode); - if (channel == NULL) { - return NULL; - } - - /* - * Set up the normal channel options for stdio handles. - */ - - if (Tcl_GetChannelType(channel) == &fileChannelType) { - Tcl_SetChannelOption(NULL, channel, "-translation", "auto"); - } else { - Tcl_SetChannelOption(NULL, channel, "-translation", "auto crlf"); - } - 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( - Tcl_Interp *interp, /* Interpreter in which to find file. */ - const char *chanID, /* 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, fd; - const Tcl_ChannelType *chanTypePtr; - ClientData data; - FILE *f; - - chan = Tcl_GetChannel(interp, chanID, &chanMode); - if (chan == NULL) { - return TCL_ERROR; - } - if (forWriting && !(chanMode & TCL_WRITABLE)) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "\"%s\" wasn't opened for writing", chanID)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "CHANNEL", "NOT_WRITABLE", - NULL); - return TCL_ERROR; - } else if (!forWriting && !(chanMode & TCL_READABLE)) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "\"%s\" wasn't opened for reading", chanID)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "CHANNEL", "NOT_READABLE", - 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 */ - || (strcmp(chanTypePtr->typeName, "tcp") == 0) - || (strcmp(chanTypePtr->typeName, "pipe") == 0)) { - if (Tcl_GetChannelHandle(chan, - (forWriting ? TCL_WRITABLE : TCL_READABLE), &data) == TCL_OK) { - fd = PTR2INT(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_SetObjResult(interp, Tcl_ObjPrintf( - "cannot get a FILE * for \"%s\"", chanID)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "CHANNEL", - "FILE_FAILURE", NULL); - return TCL_ERROR; - } - *filePtr = f; - return TCL_OK; - } - } - - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "\"%s\" cannot be used to get a FILE *", chanID)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "CHANNEL", "NO_DESCRIPTOR", - NULL); - return TCL_ERROR; -} - -#ifndef HAVE_COREFOUNDATION /* Darwin/Mac OS X CoreFoundation notifier is - * in tclMacOSXNotify.c */ -/* - *---------------------------------------------------------------------- - * - * TclUnixWaitForFile -- - * - * This function 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 function 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 function. - * - * Side effects: - * Time passes. - * - *---------------------------------------------------------------------- - */ - -int -TclUnixWaitForFile( - 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 = {0, 0}, now; /* silence gcc 4 warning */ - struct timeval blockTime, *timeoutPtr; - int numFound, result = 0; - fd_set readableMask; - fd_set writableMask; - fd_set exceptionMask; - -#ifndef _DARWIN_C_SOURCE - /* - * Sanity check fd. - */ - - if (fd >= FD_SETSIZE) { - Tcl_Panic("TclUnixWaitForFile can't handle file id %d", fd); - /* must never get here, or select masks overrun will occur below */ - } -#endif - - /* - * If there is a non-zero finite timeout, compute the time when we give - * up. - */ - - if (timeout > 0) { - Tcl_GetTime(&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 select masks. - */ - - FD_ZERO(&readableMask); - FD_ZERO(&writableMask); - FD_ZERO(&exceptionMask); - - /* - * 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; - } - } - - /* - * Setup the select masks for the fd. - */ - - if (mask & TCL_READABLE) { - FD_SET(fd, &readableMask); - } - if (mask & TCL_WRITABLE) { - FD_SET(fd, &writableMask); - } - if (mask & TCL_EXCEPTION) { - FD_SET(fd, &exceptionMask); - } - - /* - * Wait for the event or a timeout. - */ - - numFound = select(fd + 1, &readableMask, &writableMask, - &exceptionMask, timeoutPtr); - if (numFound == 1) { - if (FD_ISSET(fd, &readableMask)) { - SET_BITS(result, TCL_READABLE); - } - if (FD_ISSET(fd, &writableMask)) { - SET_BITS(result, TCL_WRITABLE); - } - if (FD_ISSET(fd, &exceptionMask)) { - SET_BITS(result, TCL_EXCEPTION); - } - result &= mask; - if (result) { - break; - } - } - if (timeout == 0) { - break; - } - if (timeout < 0) { - continue; - } - - /* - * The select returned early, so we need to recompute the timeout. - */ - - Tcl_GetTime(&now); - if ((abortTime.sec < now.sec) - || (abortTime.sec==now.sec && abortTime.usec<=now.usec)) { - break; - } - } - return result; -} -#endif /* HAVE_COREFOUNDATION */ - -/* - *---------------------------------------------------------------------- - * - * FileTruncateProc -- - * - * Truncates a file to a given length. - * - * Results: - * 0 if the operation succeeded, and -1 if it failed (in which case - * *errorCodePtr will be set to errno). - * - * Side effects: - * The underlying file is potentially truncated. This can have a wide - * variety of side effects, including moving file pointers that point at - * places later in the file than the truncate point. - * - *---------------------------------------------------------------------- - */ - -static int -FileTruncateProc( - ClientData instanceData, - Tcl_WideInt length) -{ - FileState *fsPtr = instanceData; - int result; - -#ifdef HAVE_TYPE_OFF64_T - /* - * We assume this goes with the type for now... - */ - - result = ftruncate64(fsPtr->fd, (off64_t) length); -#else - result = ftruncate(fsPtr->fd, (off_t) length); -#endif - if (result) { - return errno; - } - return 0; -} - -/* - * Local Variables: - * mode: c - * c-basic-offset: 4 - * fill-column: 78 - * End: - */ |