1511 lines
44 KiB
C
1511 lines
44 KiB
C
/*
|
||
* tclIOCmd.c --
|
||
*
|
||
* Contains the definitions of most of the Tcl commands relating to IO.
|
||
*
|
||
* Copyright (c) 1995-1996 Sun Microsystems, Inc.
|
||
*
|
||
* See the file "license.terms" for information on usage and redistribution
|
||
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*
|
||
* SCCS: @(#) tclIOCmd.c 1.99 96/09/27 10:01:45
|
||
*/
|
||
|
||
#include "tclInt.h"
|
||
#include "tclPort.h"
|
||
|
||
/*
|
||
* Return at most this number of bytes in one call to Tcl_Read:
|
||
*/
|
||
|
||
#define TCL_READ_CHUNK_SIZE 4096
|
||
|
||
/*
|
||
* Callback structure for accept callback in a TCP server.
|
||
*/
|
||
|
||
typedef struct AcceptCallback {
|
||
char *script; /* Script to invoke. */
|
||
Tcl_Interp *interp; /* Interpreter in which to run it. */
|
||
} AcceptCallback;
|
||
|
||
/*
|
||
* Static functions for this file:
|
||
*/
|
||
|
||
static void AcceptCallbackProc _ANSI_ARGS_((ClientData callbackData,
|
||
Tcl_Channel chan, char *address, int port));
|
||
static void RegisterTcpServerInterpCleanup _ANSI_ARGS_((Tcl_Interp *interp,
|
||
AcceptCallback *acceptCallbackPtr));
|
||
static void TcpAcceptCallbacksDeleteProc _ANSI_ARGS_((
|
||
ClientData clientData, Tcl_Interp *interp));
|
||
static void TcpServerCloseProc _ANSI_ARGS_((ClientData callbackData));
|
||
static void UnregisterTcpServerInterpCleanupProc _ANSI_ARGS_((
|
||
Tcl_Interp *interp, AcceptCallback *acceptCallbackPtr));
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_PutsCmd --
|
||
*
|
||
* This procedure is invoked to process the "puts" Tcl command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Produces output on a channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_PutsCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to puts on. */
|
||
int i; /* Counter. */
|
||
int newline; /* Add a newline at end? */
|
||
char *channelId; /* Name of channel for puts. */
|
||
int result; /* Result of puts operation. */
|
||
int mode; /* Mode in which channel is opened. */
|
||
|
||
i = 1;
|
||
newline = 1;
|
||
if ((argc >= 2) && (strcmp(argv[1], "-nonewline") == 0)) {
|
||
newline = 0;
|
||
i++;
|
||
}
|
||
if ((i < (argc-3)) || (i >= argc)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" ?-nonewline? ?channelId? string\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* The code below provides backwards compatibility with an old
|
||
* form of the command that is no longer recommended or documented.
|
||
*/
|
||
|
||
if (i == (argc-3)) {
|
||
if (strncmp(argv[i+2], "nonewline", strlen(argv[i+2])) != 0) {
|
||
Tcl_AppendResult(interp, "bad argument \"", argv[i+2],
|
||
"\": should be \"nonewline\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
newline = 0;
|
||
}
|
||
if (i == (argc-1)) {
|
||
channelId = "stdout";
|
||
} else {
|
||
channelId = argv[i];
|
||
i++;
|
||
}
|
||
chan = Tcl_GetChannel(interp, channelId, &mode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_WRITABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", channelId,
|
||
"\" wasn't opened for writing", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
result = Tcl_Write(chan, argv[i], -1);
|
||
if (result < 0) {
|
||
goto error;
|
||
}
|
||
if (newline != 0) {
|
||
result = Tcl_Write(chan, "\n", 1);
|
||
if (result < 0) {
|
||
goto error;
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
error:
|
||
Tcl_AppendResult(interp, "error writing \"", Tcl_GetChannelName(chan),
|
||
"\": ", Tcl_PosixError(interp), (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_FlushCmd --
|
||
*
|
||
* This procedure is called to process the Tcl "flush" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May cause output to appear on the specified channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_FlushCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to flush on. */
|
||
int result; /* Result of call to channel
|
||
* level function. */
|
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int mode; /* Mode in which channel is opened. */
|
||
|
||
if (argc != 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], &mode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_WRITABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", argv[1],
|
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"\" wasn't opened for writing", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
result = Tcl_Flush(chan);
|
||
if (result != TCL_OK) {
|
||
Tcl_AppendResult(interp, "error flushing \"", Tcl_GetChannelName(chan),
|
||
"\": ", Tcl_PosixError(interp), (char *) NULL);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetsCmd --
|
||
*
|
||
* This procedure is called to process the Tcl "gets" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May consume input from channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_GetsCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to read from. */
|
||
char *varName; /* Assign to this variable? */
|
||
char buf[128]; /* Buffer to store string
|
||
* representation of how long
|
||
* a line was read. */
|
||
Tcl_DString ds; /* Dynamic string to hold the
|
||
* buffer for the line just read. */
|
||
int lineLen; /* Length of line just read. */
|
||
int mode; /* Mode in which channel is opened. */
|
||
|
||
if ((argc != 2) && (argc != 3)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId ?varName?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], &mode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_READABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", argv[1],
|
||
"\" wasn't opened for reading", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (argc != 3) {
|
||
varName = (char *) NULL;
|
||
} else {
|
||
varName = argv[2];
|
||
}
|
||
Tcl_DStringInit(&ds);
|
||
lineLen = Tcl_Gets(chan, &ds);
|
||
if (lineLen < 0) {
|
||
if (!Tcl_Eof(chan) && !Tcl_InputBlocked(chan)) {
|
||
Tcl_DStringFree(&ds);
|
||
Tcl_AppendResult(interp, "error reading \"",
|
||
Tcl_GetChannelName(chan), "\": ", Tcl_PosixError(interp),
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
lineLen = -1;
|
||
}
|
||
if (varName == (char *) NULL) {
|
||
Tcl_DStringResult(interp, &ds);
|
||
} else {
|
||
if (Tcl_SetVar(interp, varName, Tcl_DStringValue(&ds),
|
||
TCL_LEAVE_ERR_MSG) == NULL) {
|
||
Tcl_DStringFree(&ds);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_ResetResult(interp);
|
||
sprintf(buf, "%d", lineLen);
|
||
Tcl_AppendResult(interp, buf, (char *) NULL);
|
||
}
|
||
Tcl_DStringFree(&ds);
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_ReadCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "read" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May consume input from channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_ReadCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to read from. */
|
||
int newline, i; /* Discard newline at end? */
|
||
int toRead; /* How many bytes to read? */
|
||
int toReadNow; /* How many bytes to attempt to
|
||
* read in the current iteration? */
|
||
int charactersRead; /* How many characters were read? */
|
||
int charactersReadNow; /* How many characters were read
|
||
* in this iteration? */
|
||
int mode; /* Mode in which channel is opened. */
|
||
Tcl_DString ds; /* Used to accumulate the data
|
||
* read by Tcl_Read. */
|
||
int bufSize; /* Channel buffer size; used to decide
|
||
* in what chunk sizes to read from
|
||
* the channel. */
|
||
|
||
if ((argc != 2) && (argc != 3)) {
|
||
argerror:
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId ?numBytes?\" or \"", argv[0],
|
||
" ?-nonewline? channelId\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
i = 1;
|
||
newline = 0;
|
||
if (strcmp(argv[i], "-nonewline") == 0) {
|
||
newline = 1;
|
||
i++;
|
||
}
|
||
|
||
if (i == argc) {
|
||
goto argerror;
|
||
}
|
||
|
||
chan = Tcl_GetChannel(interp, argv[i], &mode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_READABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", argv[i],
|
||
"\" wasn't opened for reading", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
i++; /* Consumed channel name. */
|
||
|
||
/*
|
||
* Compute how many bytes to read, and see whether the final
|
||
* newline should be dropped.
|
||
*/
|
||
|
||
toRead = INT_MAX;
|
||
if (i < argc) {
|
||
if (isdigit((unsigned char) (argv[i][0]))) {
|
||
if (Tcl_GetInt(interp, argv[i], &toRead) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
} else if (strcmp(argv[i], "nonewline") == 0) {
|
||
newline = 1;
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad argument \"", argv[i],
|
||
"\": should be \"nonewline\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
bufSize = Tcl_GetChannelBufferSize(chan);
|
||
Tcl_DStringInit(&ds);
|
||
for (charactersRead = 0; charactersRead < toRead; ) {
|
||
toReadNow = toRead - charactersRead;
|
||
if (toReadNow > bufSize) {
|
||
toReadNow = bufSize;
|
||
}
|
||
Tcl_DStringSetLength(&ds, charactersRead + toReadNow);
|
||
charactersReadNow =
|
||
Tcl_Read(chan, Tcl_DStringValue(&ds) + charactersRead, toReadNow);
|
||
if (charactersReadNow < 0) {
|
||
Tcl_DStringFree(&ds);
|
||
Tcl_AppendResult(interp, "error reading \"",
|
||
Tcl_GetChannelName(chan), "\": ",
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* If we had a short read it means that we have either EOF
|
||
* or BLOCKED on the channel, so break out.
|
||
*/
|
||
|
||
charactersRead += charactersReadNow;
|
||
if (charactersReadNow < toReadNow) {
|
||
break; /* Out of "for" loop. */
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Tcl_Read does not put a NULL at the end of the string, so we must
|
||
* do it here.
|
||
*/
|
||
|
||
Tcl_DStringSetLength(&ds, charactersRead);
|
||
Tcl_DStringResult(interp, &ds);
|
||
Tcl_DStringFree(&ds);
|
||
|
||
/*
|
||
* If requested, remove the last newline in the channel if at EOF.
|
||
*/
|
||
|
||
if ((charactersRead > 0) && (newline) &&
|
||
(interp->result[charactersRead-1] == '\n')) {
|
||
interp->result[charactersRead-1] = '\0';
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclUnsupported0Cmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "unsupported0" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May copy a chunk from one channel to another.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclUnsupported0Cmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Interpreter in which both channels
|
||
* are defined. */
|
||
int argc; /* How many arguments? */
|
||
char **argv; /* The argument strings. */
|
||
{
|
||
Tcl_Channel inChan, outChan;
|
||
int requested;
|
||
char *bufPtr;
|
||
int actuallyRead, actuallyWritten, totalRead, toReadNow, mode;
|
||
|
||
/*
|
||
* Assume we want to copy the entire channel.
|
||
*/
|
||
|
||
requested = INT_MAX;
|
||
|
||
if ((argc < 3) || (argc > 4)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " inChanId outChanId ?chunkSize?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
inChan = Tcl_GetChannel(interp, argv[1], &mode);
|
||
if (inChan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_READABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", argv[1],
|
||
"\" wasn't opened for reading", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
outChan = Tcl_GetChannel(interp, argv[2], &mode);
|
||
if (outChan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_WRITABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", argv[2],
|
||
"\" wasn't opened for writing", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (argc == 4) {
|
||
if (Tcl_GetInt(interp, argv[3], &requested) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (requested < 0) {
|
||
requested = INT_MAX;
|
||
}
|
||
}
|
||
|
||
bufPtr = ckalloc((unsigned) TCL_READ_CHUNK_SIZE);
|
||
for (totalRead = 0;
|
||
requested > 0;
|
||
totalRead += actuallyRead, requested -= actuallyRead) {
|
||
toReadNow = requested;
|
||
if (toReadNow > TCL_READ_CHUNK_SIZE) {
|
||
toReadNow = TCL_READ_CHUNK_SIZE;
|
||
}
|
||
actuallyRead = Tcl_Read(inChan, bufPtr, toReadNow);
|
||
if (actuallyRead < 0) {
|
||
ckfree(bufPtr);
|
||
Tcl_AppendResult(interp, argv[0], ": ", Tcl_GetChannelName(inChan),
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (actuallyRead == 0) {
|
||
ckfree(bufPtr);
|
||
sprintf(interp->result, "%d", totalRead);
|
||
return TCL_OK;
|
||
}
|
||
actuallyWritten = Tcl_Write(outChan, bufPtr, actuallyRead);
|
||
if (actuallyWritten < 0) {
|
||
ckfree(bufPtr);
|
||
Tcl_AppendResult(interp, argv[0], ": ", Tcl_GetChannelName(outChan),
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
ckfree(bufPtr);
|
||
|
||
sprintf(interp->result, "%d", totalRead);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_SeekCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "seek" command. See
|
||
* the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Moves the position of the access point on the specified channel.
|
||
* May flush queued output.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_SeekCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to tell on. */
|
||
int offset, mode; /* Where to seek? */
|
||
int result; /* Of calling Tcl_Seek. */
|
||
|
||
if ((argc != 3) && (argc != 4)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId offset ?origin?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], NULL);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_GetInt(interp, argv[2], &offset) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
mode = SEEK_SET;
|
||
if (argc == 4) {
|
||
size_t length;
|
||
int c;
|
||
|
||
length = strlen(argv[3]);
|
||
c = argv[3][0];
|
||
if ((c == 's') && (strncmp(argv[3], "start", length) == 0)) {
|
||
mode = SEEK_SET;
|
||
} else if ((c == 'c') && (strncmp(argv[3], "current", length) == 0)) {
|
||
mode = SEEK_CUR;
|
||
} else if ((c == 'e') && (strncmp(argv[3], "end", length) == 0)) {
|
||
mode = SEEK_END;
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad origin \"", argv[3],
|
||
"\": should be start, current, or end", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
result = Tcl_Seek(chan, offset, mode);
|
||
if (result < 0) {
|
||
Tcl_AppendResult(interp, "error during seek on \"",
|
||
Tcl_GetChannelName(chan), "\": ",
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_TellCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "tell" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_TellCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to tell on. */
|
||
|
||
if (argc != 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
/*
|
||
* Try to find a channel with the right name and permissions in
|
||
* the IO channel table of this interpreter.
|
||
*/
|
||
|
||
chan = Tcl_GetChannel(interp, argv[1], NULL);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
sprintf(interp->result, "%d", Tcl_Tell(chan));
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_CloseCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "close" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May discard queued input; may flush queued output.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_CloseCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to close. */
|
||
int len; /* Length of error output. */
|
||
|
||
if (argc != 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], NULL);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_UnregisterChannel(interp, chan) != TCL_OK) {
|
||
|
||
/*
|
||
* If there is an error message and it ends with a newline, remove
|
||
* the newline. This is done for command pipeline channels where the
|
||
* error output from the subprocesses is stored in interp->result.
|
||
*
|
||
* NOTE: This is likely to not have any effect on regular error
|
||
* messages produced by drivers during the closing of a channel,
|
||
* because the Tcl convention is that such error messages do not
|
||
* have a terminating newline.
|
||
*/
|
||
|
||
len = strlen(interp->result);
|
||
if ((len > 0) && (interp->result[len - 1] == '\n')) {
|
||
interp->result[len - 1] = '\0';
|
||
}
|
||
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_FconfigureCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "fconfigure" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May modify the behavior of an IO channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_FconfigureCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to set a mode on. */
|
||
int result; /* Of Tcl_Set/GetChannelOption. */
|
||
int i; /* Iterate over arg-value pairs. */
|
||
Tcl_DString ds; /* DString to hold result of
|
||
* calling Tcl_GetChannelOption. */
|
||
|
||
if ((argc < 2) || (((argc % 2) == 1) && (argc != 3))) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId ?optionName? ?value? ?optionName value?...\"",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], NULL);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (argc == 2) {
|
||
Tcl_DStringInit(&ds);
|
||
if (Tcl_GetChannelOption(chan, (char *) NULL, &ds) != TCL_OK) {
|
||
Tcl_AppendResult(interp, "option retrieval failed",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_DStringResult(interp, &ds);
|
||
Tcl_DStringFree(&ds);
|
||
return TCL_OK;
|
||
}
|
||
if (argc == 3) {
|
||
Tcl_DStringInit(&ds);
|
||
if (Tcl_GetChannelOption(chan, argv[2], &ds) != TCL_OK) {
|
||
Tcl_DStringFree(&ds);
|
||
Tcl_AppendResult(interp, "bad option \"", argv[2],
|
||
"\": must be -blocking, -buffering, -buffersize, ",
|
||
"-eofchar, -translation, ",
|
||
"or a channel type specific option", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_DStringResult(interp, &ds);
|
||
Tcl_DStringFree(&ds);
|
||
return TCL_OK;
|
||
}
|
||
for (i = 3; i < argc; i += 2) {
|
||
result = Tcl_SetChannelOption(interp, chan, argv[i-1], argv[i]);
|
||
if (result != TCL_OK) {
|
||
return result;
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_EofCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "eof" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Sets interp->result to "0" or "1" depending on whether the
|
||
* specified channel has an EOF condition.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_EofCmd(unused, interp, argc, argv)
|
||
ClientData unused; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to query for EOF. */
|
||
int mode; /* Mode in which channel is opened. */
|
||
|
||
if (argc != 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], &mode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
sprintf(interp->result, "%d", Tcl_Eof(chan) ? 1 : 0);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_ExecCmd --
|
||
*
|
||
* This procedure is invoked to process the "exec" Tcl command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_ExecCmd(dummy, interp, argc, argv)
|
||
ClientData dummy; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
#ifdef MAC_TCL
|
||
Tcl_AppendResult(interp, "exec not implemented under Mac OS",
|
||
(char *)NULL);
|
||
return TCL_ERROR;
|
||
#else /* !MAC_TCL */
|
||
int keepNewline, firstWord, background, length, result;
|
||
Tcl_Channel chan;
|
||
Tcl_DString ds;
|
||
int readSoFar, readNow, bufSize;
|
||
|
||
/*
|
||
* Check for a leading "-keepnewline" argument.
|
||
*/
|
||
|
||
keepNewline = 0;
|
||
for (firstWord = 1; (firstWord < argc) && (argv[firstWord][0] == '-');
|
||
firstWord++) {
|
||
if (strcmp(argv[firstWord], "-keepnewline") == 0) {
|
||
keepNewline = 1;
|
||
} else if (strcmp(argv[firstWord], "--") == 0) {
|
||
firstWord++;
|
||
break;
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad switch \"", argv[firstWord],
|
||
"\": must be -keepnewline or --", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
if (argc <= firstWord) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" ?switches? arg ?arg ...?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* See if the command is to be run in background.
|
||
*/
|
||
|
||
background = 0;
|
||
if ((argv[argc-1][0] == '&') && (argv[argc-1][1] == 0)) {
|
||
argc--;
|
||
argv[argc] = NULL;
|
||
background = 1;
|
||
}
|
||
|
||
chan = Tcl_OpenCommandChannel(interp, argc-firstWord,
|
||
argv+firstWord,
|
||
(background ? 0 : TCL_STDOUT | TCL_STDERR));
|
||
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (background) {
|
||
|
||
/*
|
||
* Get the list of PIDs from the pipeline into interp->result and
|
||
* detach the PIDs (instead of waiting for them).
|
||
*/
|
||
|
||
TclGetAndDetachPids(interp, chan);
|
||
|
||
if (Tcl_Close(interp, chan) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
if (Tcl_GetChannelFile(chan, TCL_READABLE) != NULL) {
|
||
#define EXEC_BUFFER_SIZE 4096
|
||
|
||
Tcl_DStringInit(&ds);
|
||
readSoFar = 0; bufSize = 0;
|
||
while (1) {
|
||
bufSize += EXEC_BUFFER_SIZE;
|
||
Tcl_DStringSetLength(&ds, bufSize);
|
||
readNow = Tcl_Read(chan, Tcl_DStringValue(&ds) + readSoFar,
|
||
EXEC_BUFFER_SIZE);
|
||
if (readNow < 0) {
|
||
Tcl_DStringFree(&ds);
|
||
Tcl_AppendResult(interp,
|
||
"error reading output from command: ",
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
readSoFar += readNow;
|
||
if (readNow < EXEC_BUFFER_SIZE) {
|
||
break; /* Out of "while (1)" loop. */
|
||
}
|
||
}
|
||
Tcl_DStringSetLength(&ds, readSoFar);
|
||
Tcl_DStringResult(interp, &ds);
|
||
Tcl_DStringFree(&ds);
|
||
}
|
||
|
||
result = Tcl_Close(interp, chan);
|
||
|
||
/*
|
||
* If the last character of interp->result is a newline, then remove
|
||
* the newline character (the newline would just confuse things).
|
||
* Special hack: must replace the old terminating null character
|
||
* as a signal to Tcl_AppendResult et al. that we've mucked with
|
||
* the string.
|
||
*/
|
||
|
||
length = strlen(interp->result);
|
||
if (!keepNewline && (length > 0) &&
|
||
(interp->result[length-1] == '\n')) {
|
||
interp->result[length-1] = '\0';
|
||
interp->result[length] = 'x';
|
||
}
|
||
|
||
return result;
|
||
#endif /* !MAC_TCL */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_FblockedCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl "fblocked" command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Sets interp->result to "0" or "1" depending on whether the
|
||
* a preceding input operation on the channel would have blocked.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_FblockedCmd(unused, interp, argc, argv)
|
||
ClientData unused; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to query for blocked. */
|
||
int mode; /* Mode in which channel was opened. */
|
||
|
||
if (argc != 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" channelId\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(interp, argv[1], &mode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((mode & TCL_READABLE) == 0) {
|
||
Tcl_AppendResult(interp, "channel \"", argv[1],
|
||
"\" wasn't opened for reading", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
sprintf(interp->result, "%d", Tcl_InputBlocked(chan) ? 1 : 0);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_OpenCmd --
|
||
*
|
||
* This procedure is invoked to process the "open" Tcl command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_OpenCmd(notUsed, interp, argc, argv)
|
||
ClientData notUsed; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
int pipeline, prot;
|
||
char *modeString;
|
||
Tcl_Channel chan;
|
||
|
||
if ((argc < 2) || (argc > 4)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" fileName ?access? ?permissions?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
prot = 0666;
|
||
if (argc == 2) {
|
||
modeString = "r";
|
||
} else {
|
||
modeString = argv[2];
|
||
if (argc == 4) {
|
||
if (Tcl_GetInt(interp, argv[3], &prot) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
}
|
||
|
||
pipeline = 0;
|
||
if (argv[1][0] == '|') {
|
||
pipeline = 1;
|
||
}
|
||
|
||
/*
|
||
* Open the file or create a process pipeline.
|
||
*/
|
||
|
||
if (!pipeline) {
|
||
chan = Tcl_OpenFileChannel(interp, argv[1], modeString, prot);
|
||
} else {
|
||
int mode, seekFlag, cmdArgc;
|
||
char **cmdArgv;
|
||
|
||
if (Tcl_SplitList(interp, argv[1]+1, &cmdArgc, &cmdArgv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
mode = TclGetOpenMode(interp, modeString, &seekFlag);
|
||
if (mode == -1) {
|
||
chan = NULL;
|
||
} else {
|
||
int flags = TCL_STDERR | TCL_ENFORCE_MODE;
|
||
switch (mode & (O_RDONLY | O_WRONLY | O_RDWR)) {
|
||
case O_RDONLY:
|
||
flags |= TCL_STDOUT;
|
||
break;
|
||
case O_WRONLY:
|
||
flags |= TCL_STDIN;
|
||
break;
|
||
case O_RDWR:
|
||
flags |= (TCL_STDIN | TCL_STDOUT);
|
||
break;
|
||
default:
|
||
panic("Tcl_OpenCmd: invalid mode value");
|
||
break;
|
||
}
|
||
chan = Tcl_OpenCommandChannel(interp, cmdArgc, cmdArgv, flags);
|
||
}
|
||
ckfree((char *) cmdArgv);
|
||
}
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_RegisterChannel(interp, chan);
|
||
Tcl_AppendResult(interp, Tcl_GetChannelName(chan), (char *) NULL);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpAcceptCallbacksDeleteProc --
|
||
*
|
||
* Assocdata cleanup routine called when an interpreter is being
|
||
* deleted to set the interp field of all the accept callback records
|
||
* registered with the interpreter to NULL. This will prevent the
|
||
* interpreter from being used in the future to eval accept scripts.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Deallocates memory and sets the interp field of all the accept
|
||
* callback records to NULL to prevent this interpreter from being
|
||
* used subsequently to eval accept scripts.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
TcpAcceptCallbacksDeleteProc(clientData, interp)
|
||
ClientData clientData; /* Data which was passed when the assocdata
|
||
* was registered. */
|
||
Tcl_Interp *interp; /* Interpreter being deleted - not used. */
|
||
{
|
||
Tcl_HashTable *hTblPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
Tcl_HashSearch hSearch;
|
||
AcceptCallback *acceptCallbackPtr;
|
||
|
||
hTblPtr = (Tcl_HashTable *) clientData;
|
||
for (hPtr = Tcl_FirstHashEntry(hTblPtr, &hSearch);
|
||
hPtr != (Tcl_HashEntry *) NULL;
|
||
hPtr = Tcl_NextHashEntry(&hSearch)) {
|
||
acceptCallbackPtr = (AcceptCallback *) Tcl_GetHashValue(hPtr);
|
||
acceptCallbackPtr->interp = (Tcl_Interp *) NULL;
|
||
}
|
||
Tcl_DeleteHashTable(hTblPtr);
|
||
ckfree((char *) hTblPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* RegisterTcpServerInterpCleanup --
|
||
*
|
||
* Registers an accept callback record to have its interp
|
||
* field set to NULL when the interpreter is deleted.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* When, in the future, the interpreter is deleted, the interp
|
||
* field of the accept callback data structure will be set to
|
||
* NULL. This will prevent attempts to eval the accept script
|
||
* in a deleted interpreter.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
RegisterTcpServerInterpCleanup(interp, acceptCallbackPtr)
|
||
Tcl_Interp *interp; /* Interpreter for which we want to be
|
||
* informed of deletion. */
|
||
AcceptCallback *acceptCallbackPtr;
|
||
/* The accept callback record whose
|
||
* interp field we want set to NULL when
|
||
* the interpreter is deleted. */
|
||
{
|
||
Tcl_HashTable *hTblPtr; /* Hash table for accept callback
|
||
* records to smash when the interpreter
|
||
* will be deleted. */
|
||
Tcl_HashEntry *hPtr; /* Entry for this record. */
|
||
int new; /* Is the entry new? */
|
||
|
||
hTblPtr = (Tcl_HashTable *) Tcl_GetAssocData(interp,
|
||
"tclTCPAcceptCallbacks",
|
||
NULL);
|
||
if (hTblPtr == (Tcl_HashTable *) NULL) {
|
||
hTblPtr = (Tcl_HashTable *) ckalloc((unsigned) sizeof(Tcl_HashTable));
|
||
Tcl_InitHashTable(hTblPtr, TCL_ONE_WORD_KEYS);
|
||
(void) Tcl_SetAssocData(interp, "tclTCPAcceptCallbacks",
|
||
TcpAcceptCallbacksDeleteProc, (ClientData) hTblPtr);
|
||
}
|
||
hPtr = Tcl_CreateHashEntry(hTblPtr, (char *) acceptCallbackPtr, &new);
|
||
if (!new) {
|
||
panic("RegisterTcpServerCleanup: damaged accept record table");
|
||
}
|
||
Tcl_SetHashValue(hPtr, (ClientData) acceptCallbackPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* UnregisterTcpServerInterpCleanupProc --
|
||
*
|
||
* Unregister a previously registered accept callback record. The
|
||
* interp field of this record will no longer be set to NULL in
|
||
* the future when the interpreter is deleted.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Prevents the interp field of the accept callback record from
|
||
* being set to NULL in the future when the interpreter is deleted.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
UnregisterTcpServerInterpCleanupProc(interp, acceptCallbackPtr)
|
||
Tcl_Interp *interp; /* Interpreter in which the accept callback
|
||
* record was registered. */
|
||
AcceptCallback *acceptCallbackPtr;
|
||
/* The record for which to delete the
|
||
* registration. */
|
||
{
|
||
Tcl_HashTable *hTblPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
|
||
hTblPtr = (Tcl_HashTable *) Tcl_GetAssocData(interp,
|
||
"tclTCPAcceptCallbacks", NULL);
|
||
if (hTblPtr == (Tcl_HashTable *) NULL) {
|
||
return;
|
||
}
|
||
hPtr = Tcl_FindHashEntry(hTblPtr, (char *) acceptCallbackPtr);
|
||
if (hPtr == (Tcl_HashEntry *) NULL) {
|
||
return;
|
||
}
|
||
Tcl_DeleteHashEntry(hPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AcceptCallbackProc --
|
||
*
|
||
* This callback is invoked by the TCP channel driver when it
|
||
* accepts a new connection from a client on a server socket.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Whatever the script does.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AcceptCallbackProc(callbackData, chan, address, port)
|
||
ClientData callbackData; /* The data stored when the callback
|
||
* was created in the call to
|
||
* Tcl_OpenTcpServer. */
|
||
Tcl_Channel chan; /* Channel for the newly accepted
|
||
* connection. */
|
||
char *address; /* Address of client that was
|
||
* accepted. */
|
||
int port; /* Port of client that was accepted. */
|
||
{
|
||
AcceptCallback *acceptCallbackPtr;
|
||
Tcl_Interp *interp;
|
||
char *script;
|
||
char portBuf[10];
|
||
int result;
|
||
|
||
acceptCallbackPtr = (AcceptCallback *) callbackData;
|
||
|
||
/*
|
||
* Check if the callback is still valid; the interpreter may have gone
|
||
* away, this is signalled by setting the interp field of the callback
|
||
* data to NULL.
|
||
*/
|
||
|
||
if (acceptCallbackPtr->interp != (Tcl_Interp *) NULL) {
|
||
|
||
script = acceptCallbackPtr->script;
|
||
interp = acceptCallbackPtr->interp;
|
||
|
||
Tcl_Preserve((ClientData) script);
|
||
Tcl_Preserve((ClientData) interp);
|
||
|
||
sprintf(portBuf, "%d", port);
|
||
Tcl_RegisterChannel(interp, chan);
|
||
result = Tcl_VarEval(interp, script, " ", Tcl_GetChannelName(chan),
|
||
" ", address, " ", portBuf, (char *) NULL);
|
||
if (result != TCL_OK) {
|
||
Tcl_BackgroundError(interp);
|
||
Tcl_UnregisterChannel(interp, chan);
|
||
}
|
||
Tcl_Release((ClientData) interp);
|
||
Tcl_Release((ClientData) script);
|
||
} else {
|
||
|
||
/*
|
||
* The interpreter has been deleted, so there is no useful
|
||
* way to utilize the client socket - just close it.
|
||
*/
|
||
|
||
Tcl_Close((Tcl_Interp *) NULL, chan);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpServerCloseProc --
|
||
*
|
||
* This callback is called when the TCP server channel for which it
|
||
* was registered is being closed. It informs the interpreter in
|
||
* which the accept script is evaluated (if that interpreter still
|
||
* exists) that this channel no longer needs to be informed if the
|
||
* interpreter is deleted.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* In the future, if the interpreter is deleted this channel will
|
||
* no longer be informed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
TcpServerCloseProc(callbackData)
|
||
ClientData callbackData; /* The data passed in the call to
|
||
* Tcl_CreateCloseHandler. */
|
||
{
|
||
AcceptCallback *acceptCallbackPtr;
|
||
/* The actual data. */
|
||
|
||
acceptCallbackPtr = (AcceptCallback *) callbackData;
|
||
if (acceptCallbackPtr->interp != (Tcl_Interp *) NULL) {
|
||
UnregisterTcpServerInterpCleanupProc(acceptCallbackPtr->interp,
|
||
acceptCallbackPtr);
|
||
}
|
||
Tcl_EventuallyFree((ClientData) acceptCallbackPtr->script, TCL_DYNAMIC);
|
||
ckfree((char *) acceptCallbackPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_SocketCmd --
|
||
*
|
||
* This procedure is invoked to process the "socket" Tcl command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Creates a socket based channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_SocketCmd(notUsed, interp, argc, argv)
|
||
ClientData notUsed; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
int a, server, port;
|
||
char *arg, *copyScript, *host, *script;
|
||
char *myaddr = NULL;
|
||
int myport = 0;
|
||
int async = 0;
|
||
Tcl_Channel chan;
|
||
AcceptCallback *acceptCallbackPtr;
|
||
|
||
server = 0;
|
||
script = NULL;
|
||
|
||
if (TclHasSockets(interp) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
for (a = 1; a < argc; a++) {
|
||
arg = argv[a];
|
||
if (arg[0] == '-') {
|
||
if (strcmp(arg, "-server") == 0) {
|
||
if (async == 1) {
|
||
Tcl_AppendResult(interp,
|
||
"cannot set -async option for server sockets",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
server = 1;
|
||
a++;
|
||
if (a >= argc) {
|
||
Tcl_AppendResult(interp,
|
||
"no argument given for -server option",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
script = argv[a];
|
||
} else if (strcmp(arg, "-myaddr") == 0) {
|
||
a++;
|
||
if (a >= argc) {
|
||
Tcl_AppendResult(interp,
|
||
"no argument given for -myaddr option",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
myaddr = argv[a];
|
||
} else if (strcmp(arg, "-myport") == 0) {
|
||
a++;
|
||
if (a >= argc) {
|
||
Tcl_AppendResult(interp,
|
||
"no argument given for -myport option",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (TclSockGetPort(interp, argv[a], "tcp", &myport)
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
} else if (strcmp(arg, "-async") == 0) {
|
||
if (server == 1) {
|
||
Tcl_AppendResult(interp,
|
||
"cannot set -async option for server sockets",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
async = 1;
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad option \"", arg,
|
||
"\", must be -async, -myaddr, -myport, or -server",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
if (server) {
|
||
host = myaddr; /* NULL implies INADDR_ANY */
|
||
if (myport != 0) {
|
||
Tcl_AppendResult(interp, "Option -myport is not valid for servers",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if (a < argc) {
|
||
host = argv[a];
|
||
a++;
|
||
} else {
|
||
wrongNumArgs:
|
||
Tcl_AppendResult(interp, "wrong # args: should be either:\n",
|
||
argv[0],
|
||
" ?-myaddr addr? ?-myport myport? ?-async? host port\n",
|
||
argv[0],
|
||
" -server command ?-myaddr addr? port",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (a == argc-1) {
|
||
if (TclSockGetPort(interp, argv[a], "tcp", &port) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
goto wrongNumArgs;
|
||
}
|
||
|
||
if (server) {
|
||
acceptCallbackPtr = (AcceptCallback *) ckalloc((unsigned)
|
||
sizeof(AcceptCallback));
|
||
copyScript = ckalloc((unsigned) strlen(script) + 1);
|
||
strcpy(copyScript, script);
|
||
acceptCallbackPtr->script = copyScript;
|
||
acceptCallbackPtr->interp = interp;
|
||
chan = Tcl_OpenTcpServer(interp, port, host, AcceptCallbackProc,
|
||
(ClientData) acceptCallbackPtr);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
ckfree(copyScript);
|
||
ckfree((char *) acceptCallbackPtr);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Register with the interpreter to let us know when the
|
||
* interpreter is deleted (by having the callback set the
|
||
* acceptCallbackPtr->interp field to NULL). This is to
|
||
* avoid trying to eval the script in a deleted interpreter.
|
||
*/
|
||
|
||
RegisterTcpServerInterpCleanup(interp, acceptCallbackPtr);
|
||
|
||
/*
|
||
* Register a close callback. This callback will inform the
|
||
* interpreter (if it still exists) that this channel does not
|
||
* need to be informed when the interpreter is deleted.
|
||
*/
|
||
|
||
Tcl_CreateCloseHandler(chan, TcpServerCloseProc,
|
||
(ClientData) acceptCallbackPtr);
|
||
} else {
|
||
chan = Tcl_OpenTcpClient(interp, port, host, myaddr, myport, async);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
Tcl_RegisterChannel(interp, chan);
|
||
Tcl_AppendResult(interp, Tcl_GetChannelName(chan), (char *) NULL);
|
||
|
||
return TCL_OK;
|
||
}
|