void
TclSetupEnv(
Tcl_Interp *interp) /* Interpreter whose "env" array is to be
* managed. */
{
Tcl_DString envString;
char *p1, *p2;
int i;
/*
* Synchronize the values in the environ array with the contents of the
* Tcl "env" variable. To do this:
* 1) Remove the trace that fires when the "env" var is unset.
* 2) Unset the "env" variable.
* 3) If there are no environ variables, create an empty "env" array.
* Otherwise populate the array with current values.
* 4) Add a trace that synchronizes the "env" array.
*/
Tcl_UntraceVar2(interp, "env", NULL,
TCL_GLOBAL_ONLY | TCL_TRACE_WRITES | TCL_TRACE_UNSETS |
TCL_TRACE_READS | TCL_TRACE_ARRAY, EnvTraceProc, NULL);
Tcl_UnsetVar2(interp, "env", NULL, TCL_GLOBAL_ONLY);
if (environ[0] == NULL) {
Tcl_Obj *varNamePtr;
TclNewLiteralStringObj(varNamePtr, "env");
Tcl_IncrRefCount(varNamePtr);
TclArraySet(interp, varNamePtr, NULL);
Tcl_DecrRefCount(varNamePtr);
} else {
Tcl_MutexLock(&envMutex);
for (i = 0; environ[i] != NULL; i++) {
p1 = Tcl_ExternalToUtfDString(NULL, environ[i], -1, &envString);
p2 = strchr(p1, '=');
if (p2 == NULL) {
/*
* This condition seem to happen occasionally under some
* versions of Solaris, or when encoding accidents swallow the
* '='; ignore the entry.
*/
continue;
}
p2++;
p2[-1] = '\0';
Tcl_SetVar2(interp, "env", p1, p2, TCL_GLOBAL_ONLY);
Tcl_DStringFree(&envString);
}
Tcl_MutexUnlock(&envMutex);
}
Tcl_TraceVar2(interp, "env", NULL,
TCL_GLOBAL_ONLY | TCL_TRACE_WRITES | TCL_TRACE_UNSETS |
TCL_TRACE_READS | TCL_TRACE_ARRAY, EnvTraceProc, NULL);
}
static Tcl_Obj *
ObjValue(
Link *linkPtr) /* Structure describing linked variable. */
{
char *p;
Tcl_Obj *resultObj;
switch (linkPtr->type) {
case TCL_LINK_INT:
linkPtr->lastValue.i = LinkedVar(int);
return Tcl_NewIntObj(linkPtr->lastValue.i);
case TCL_LINK_WIDE_INT:
linkPtr->lastValue.w = LinkedVar(Tcl_WideInt);
return Tcl_NewWideIntObj(linkPtr->lastValue.w);
case TCL_LINK_DOUBLE:
linkPtr->lastValue.d = LinkedVar(double);
return Tcl_NewDoubleObj(linkPtr->lastValue.d);
case TCL_LINK_BOOLEAN:
linkPtr->lastValue.i = LinkedVar(int);
return Tcl_NewBooleanObj(linkPtr->lastValue.i != 0);
case TCL_LINK_CHAR:
linkPtr->lastValue.c = LinkedVar(char);
return Tcl_NewIntObj(linkPtr->lastValue.c);
case TCL_LINK_UCHAR:
linkPtr->lastValue.uc = LinkedVar(unsigned char);
return Tcl_NewIntObj(linkPtr->lastValue.uc);
case TCL_LINK_SHORT:
linkPtr->lastValue.s = LinkedVar(short);
return Tcl_NewIntObj(linkPtr->lastValue.s);
case TCL_LINK_USHORT:
linkPtr->lastValue.us = LinkedVar(unsigned short);
return Tcl_NewIntObj(linkPtr->lastValue.us);
case TCL_LINK_UINT:
linkPtr->lastValue.ui = LinkedVar(unsigned int);
return Tcl_NewWideIntObj((Tcl_WideInt) linkPtr->lastValue.ui);
case TCL_LINK_LONG:
linkPtr->lastValue.l = LinkedVar(long);
return Tcl_NewWideIntObj((Tcl_WideInt) linkPtr->lastValue.l);
case TCL_LINK_ULONG:
linkPtr->lastValue.ul = LinkedVar(unsigned long);
return Tcl_NewWideIntObj((Tcl_WideInt) linkPtr->lastValue.ul);
case TCL_LINK_FLOAT:
linkPtr->lastValue.f = LinkedVar(float);
return Tcl_NewDoubleObj(linkPtr->lastValue.f);
case TCL_LINK_WIDE_UINT:
linkPtr->lastValue.uw = LinkedVar(Tcl_WideUInt);
/*
* FIXME: represent as a bignum.
*/
return Tcl_NewWideIntObj((Tcl_WideInt) linkPtr->lastValue.uw);
case TCL_LINK_STRING:
p = LinkedVar(char *);
if (p == NULL) {
TclNewLiteralStringObj(resultObj, "NULL");
return resultObj;
}
return Tcl_NewStringObj(p, -1);
/*
* This code only gets executed if the link type is unknown (shouldn't
* ever happen).
*/
default:
TclNewLiteralStringObj(resultObj, "??");
return resultObj;
}
}
void
Tcl_MainEx(
int argc, /* Number of arguments. */
TCHAR **argv, /* Array of argument strings. */
Tcl_AppInitProc *appInitProc,
/* Application-specific initialization
* function to call after most initialization
* but before starting to execute commands. */
Tcl_Interp *interp)
{
Tcl_Obj *path, *resultPtr, *argvPtr, *appName;
const char *encodingName = NULL;
int code, exitCode = 0;
Tcl_MainLoopProc *mainLoopProc;
Tcl_Channel chan;
InteractiveState is;
TclpSetInitialEncodings();
TclpFindExecutable((const char *)argv[0]);
Tcl_InitMemory(interp);
is.interp = interp;
is.prompt = PROMPT_START;
is.commandPtr = Tcl_NewObj();
/*
* If the application has not already set a startup script, parse the
* first few command line arguments to determine the script path and
* encoding.
*/
if (NULL == Tcl_GetStartupScript(NULL)) {
/*
* Check whether first 3 args (argv[1] - argv[3]) look like
* -encoding ENCODING FILENAME
* or like
* FILENAME
*/
if ((argc > 3) && (0 == _tcscmp(TEXT("-encoding"), argv[1]))
&& ('-' != argv[3][0])) {
Tcl_Obj *value = NewNativeObj(argv[2], -1);
Tcl_SetStartupScript(NewNativeObj(argv[3], -1),
Tcl_GetString(value));
Tcl_DecrRefCount(value);
argc -= 3;
argv += 3;
} else if ((argc > 1) && ('-' != argv[1][0])) {
Tcl_SetStartupScript(NewNativeObj(argv[1], -1), NULL);
argc--;
argv++;
}
}
path = Tcl_GetStartupScript(&encodingName);
if (path == NULL) {
appName = NewNativeObj(argv[0], -1);
} else {
appName = path;
}
Tcl_SetVar2Ex(interp, "argv0", NULL, appName, TCL_GLOBAL_ONLY);
argc--;
argv++;
Tcl_SetVar2Ex(interp, "argc", NULL, Tcl_NewIntObj(argc), TCL_GLOBAL_ONLY);
argvPtr = Tcl_NewListObj(0, NULL);
while (argc--) {
Tcl_ListObjAppendElement(NULL, argvPtr, NewNativeObj(*argv++, -1));
}
Tcl_SetVar2Ex(interp, "argv", NULL, argvPtr, TCL_GLOBAL_ONLY);
/*
* Set the "tcl_interactive" variable.
*/
is.tty = isatty(0);
Tcl_SetVar2Ex(interp, "tcl_interactive", NULL,
Tcl_NewIntObj(!path && is.tty), TCL_GLOBAL_ONLY);
/*
* Invoke application-specific initialization.
*/
Tcl_Preserve(interp);
if (appInitProc(interp) != TCL_OK) {
chan = Tcl_GetStdChannel(TCL_STDERR);
if (chan) {
Tcl_WriteChars(chan,
"application-specific initialization failed: ", -1);
Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
Tcl_WriteChars(chan, "\n", 1);
}
}
if (Tcl_InterpDeleted(interp)) {
goto done;
}
if (Tcl_LimitExceeded(interp)) {
goto done;
}
if (TclFullFinalizationRequested()) {
/*
* Arrange for final deletion of the main interp
*/
/* ARGH Munchhausen effect */
Tcl_CreateExitHandler(FreeMainInterp, interp);
}
/*
* Invoke the script specified on the command line, if any. Must fetch it
* again, as the appInitProc might have reset it.
*/
path = Tcl_GetStartupScript(&encodingName);
if (path != NULL) {
Tcl_ResetResult(interp);
code = Tcl_FSEvalFileEx(interp, path, encodingName);
if (code != TCL_OK) {
chan = Tcl_GetStdChannel(TCL_STDERR);
if (chan) {
Tcl_Obj *options = Tcl_GetReturnOptions(interp, code);
Tcl_Obj *keyPtr, *valuePtr;
TclNewLiteralStringObj(keyPtr, "-errorinfo");
Tcl_IncrRefCount(keyPtr);
Tcl_DictObjGet(NULL, options, keyPtr, &valuePtr);
Tcl_DecrRefCount(keyPtr);
if (valuePtr) {
Tcl_WriteObj(chan, valuePtr);
}
Tcl_WriteChars(chan, "\n", 1);
Tcl_DecrRefCount(options);
}
exitCode = 1;
}
goto done;
}
/*
* We're running interactively. Source a user-specific startup file if the
* application specified one and if the file exists.
*/
Tcl_SourceRCFile(interp);
if (Tcl_LimitExceeded(interp)) {
goto done;
}
/*
* Process commands from stdin until there's an end-of-file. Note that we
* need to fetch the standard channels again after every eval, since they
* may have been changed.
*/
Tcl_IncrRefCount(is.commandPtr);
/*
* Get a new value for tty if anyone writes to ::tcl_interactive
*/
Tcl_LinkVar(interp, "tcl_interactive", (char *) &is.tty, TCL_LINK_BOOLEAN);
is.input = Tcl_GetStdChannel(TCL_STDIN);
while ((is.input != NULL) && !Tcl_InterpDeleted(interp)) {
mainLoopProc = TclGetMainLoop();
if (mainLoopProc == NULL) {
int length;
if (is.tty) {
Prompt(interp, &is);
if (Tcl_InterpDeleted(interp)) {
break;
}
if (Tcl_LimitExceeded(interp)) {
break;
}
is.input = Tcl_GetStdChannel(TCL_STDIN);
if (is.input == NULL) {
break;
}
}
if (Tcl_IsShared(is.commandPtr)) {
Tcl_DecrRefCount(is.commandPtr);
is.commandPtr = Tcl_DuplicateObj(is.commandPtr);
Tcl_IncrRefCount(is.commandPtr);
}
length = Tcl_GetsObj(is.input, is.commandPtr);
if (length < 0) {
if (Tcl_InputBlocked(is.input)) {
/*
* This can only happen if stdin has been set to
* non-blocking. In that case cycle back and try again.
* This sets up a tight polling loop (since we have no
* event loop running). If this causes bad CPU hogging, we
* might try toggling the blocking on stdin instead.
*/
continue;
}
/*
* Either EOF, or an error on stdin; we're done
*/
break;
}
/*
* Add the newline removed by Tcl_GetsObj back to the string. Have
* to add it back before testing completeness, because it can make
* a difference. [Bug 1775878]
*/
if (Tcl_IsShared(is.commandPtr)) {
Tcl_DecrRefCount(is.commandPtr);
is.commandPtr = Tcl_DuplicateObj(is.commandPtr);
Tcl_IncrRefCount(is.commandPtr);
}
Tcl_AppendToObj(is.commandPtr, "\n", 1);
if (!TclObjCommandComplete(is.commandPtr)) {
is.prompt = PROMPT_CONTINUE;
continue;
}
is.prompt = PROMPT_START;
/*
* The final newline is syntactically redundant, and causes some
* error messages troubles deeper in, so lop it back off.
*/
Tcl_GetStringFromObj(is.commandPtr, &length);
Tcl_SetObjLength(is.commandPtr, --length);
code = Tcl_RecordAndEvalObj(interp, is.commandPtr,
TCL_EVAL_GLOBAL);
is.input = Tcl_GetStdChannel(TCL_STDIN);
Tcl_DecrRefCount(is.commandPtr);
is.commandPtr = Tcl_NewObj();
Tcl_IncrRefCount(is.commandPtr);
if (code != TCL_OK) {
chan = Tcl_GetStdChannel(TCL_STDERR);
if (chan) {
Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
Tcl_WriteChars(chan, "\n", 1);
}
} else if (is.tty) {
resultPtr = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(resultPtr);
Tcl_GetStringFromObj(resultPtr, &length);
chan = Tcl_GetStdChannel(TCL_STDOUT);
if ((length > 0) && chan) {
Tcl_WriteObj(chan, resultPtr);
Tcl_WriteChars(chan, "\n", 1);
}
Tcl_DecrRefCount(resultPtr);
}
} else { /* (mainLoopProc != NULL) */
/*
* If a main loop has been defined while running interactively, we
* want to start a fileevent based prompt by establishing a
* channel handler for stdin.
*/
if (is.input) {
if (is.tty) {
Prompt(interp, &is);
}
Tcl_CreateChannelHandler(is.input, TCL_READABLE,
StdinProc, &is);
}
mainLoopProc();
Tcl_SetMainLoop(NULL);
if (is.input) {
Tcl_DeleteChannelHandler(is.input, StdinProc, &is);
}
is.input = Tcl_GetStdChannel(TCL_STDIN);
}
/*
* This code here only for the (unsupported and deprecated) [checkmem]
* command.
*/
#ifdef TCL_MEM_DEBUG
if (tclMemDumpFileName != NULL) {
Tcl_SetMainLoop(NULL);
Tcl_DeleteInterp(interp);
}
#endif /* TCL_MEM_DEBUG */
}
done:
mainLoopProc = TclGetMainLoop();
if ((exitCode == 0) && mainLoopProc && !Tcl_LimitExceeded(interp)) {
/*
* If everything has gone OK so far, call the main loop proc, if it
* exists. Packages (like Tk) can set it to start processing events at
* this point.
*/
mainLoopProc();
Tcl_SetMainLoop(NULL);
}
if (is.commandPtr != NULL) {
Tcl_DecrRefCount(is.commandPtr);
}
/*
* Rather than calling exit, invoke the "exit" command so that users can
* replace "exit" with some other command to do additional cleanup on
* exit. The Tcl_EvalObjEx call should never return.
*/
if (!Tcl_InterpDeleted(interp) && !Tcl_LimitExceeded(interp)) {
Tcl_Obj *cmd = Tcl_ObjPrintf("exit %d", exitCode);
Tcl_IncrRefCount(cmd);
Tcl_EvalObjEx(interp, cmd, TCL_EVAL_GLOBAL);
Tcl_DecrRefCount(cmd);
}
/*
* If Tcl_EvalObjEx returns, trying to eval [exit], something unusual is
* happening. Maybe interp has been deleted; maybe [exit] was redefined,
* maybe we've blown up because of an exceeded limit. We still want to
* cleanup and exit.
*/
Tcl_Exit(exitCode);
}
/* ARGSUSED */
int
Tcl_PutsObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_Channel chan; /* The channel to puts on. */
Tcl_Obj *string; /* String to write. */
Tcl_Obj *chanObjPtr = NULL; /* channel object. */
int newline; /* Add a newline at end? */
int result; /* Result of puts operation. */
int mode; /* Mode in which channel is opened. */
ThreadSpecificData *tsdPtr;
switch (objc) {
case 2: /* [puts $x] */
string = objv[1];
newline = 1;
break;
case 3: /* [puts -nonewline $x] or [puts $chan $x] */
if (strcmp(TclGetString(objv[1]), "-nonewline") == 0) {
newline = 0;
} else {
newline = 1;
chanObjPtr = objv[1];
}
string = objv[2];
break;
case 4: /* [puts -nonewline $chan $x] or [puts $chan $x nonewline] */
if (strcmp(TclGetString(objv[1]), "-nonewline") == 0) {
chanObjPtr = objv[2];
string = objv[3];
} else {
/*
* The code below provides backwards compatibility with an old
* form of the command that is no longer recommended or
* documented.
*/
char *arg;
int length;
arg = TclGetStringFromObj(objv[3], &length);
if ((length != 9)
|| (strncmp(arg, "nonewline", (size_t) length) != 0)) {
Tcl_AppendResult(interp, "bad argument \"", arg,
"\": should be \"nonewline\"", NULL);
return TCL_ERROR;
}
chanObjPtr = objv[1];
string = objv[2];
}
newline = 0;
break;
default:
/* [puts] or [puts some bad number of arguments...] */
Tcl_WrongNumArgs(interp, 1, objv, "?-nonewline? ?channelId? string");
return TCL_ERROR;
}
if (chanObjPtr == NULL) {
tsdPtr = TCL_TSD_INIT(&dataKey);
if (!tsdPtr->initialized) {
tsdPtr->initialized = 1;
TclNewLiteralStringObj(tsdPtr->stdoutObjPtr, "stdout");
Tcl_IncrRefCount(tsdPtr->stdoutObjPtr);
Tcl_CreateThreadExitHandler(FinalizeIOCmdTSD, NULL);
}
chanObjPtr = tsdPtr->stdoutObjPtr;
}
if (TclGetChannelFromObj(interp, chanObjPtr, &chan, &mode, 0) != TCL_OK) {
return TCL_ERROR;
}
if ((mode & TCL_WRITABLE) == 0) {
Tcl_AppendResult(interp, "channel \"", TclGetString(chanObjPtr),
"\" wasn't opened for writing", NULL);
return TCL_ERROR;
}
result = Tcl_WriteObj(chan, string);
if (result < 0) {
goto error;
}
if (newline != 0) {
result = Tcl_WriteChars(chan, "\n", 1);
if (result < 0) {
goto error;
}
}
return TCL_OK;
/*
* TIP #219.
* Capture error messages put by the driver into the bypass area and put
* them into the regular interpreter result. Fall back to the regular
* message if nothing was found in the bypass.
*/
error:
if (!TclChanCaughtErrorBypass(interp, chan)) {
Tcl_AppendResult(interp, "error writing \"",
TclGetString(chanObjPtr), "\": ",
Tcl_PosixError(interp), NULL);
}
return TCL_ERROR;
}
/* ARGSUSED */
int
Tcl_OpenObjCmd(
ClientData notUsed, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int pipeline, prot;
const char *modeString, *what;
Tcl_Channel chan;
if ((objc < 2) || (objc > 4)) {
Tcl_WrongNumArgs(interp, 1, objv, "fileName ?access? ?permissions?");
return TCL_ERROR;
}
prot = 0666;
if (objc == 2) {
modeString = "r";
} else {
modeString = TclGetString(objv[2]);
if (objc == 4) {
char *permString = TclGetString(objv[3]);
int code = TCL_ERROR;
int scanned = TclParseAllWhiteSpace(permString, -1);
/* Support legacy octal numbers */
if ((permString[scanned] == '0')
&& (permString[scanned+1] >= '0')
&& (permString[scanned+1] <= '7')) {
Tcl_Obj *permObj;
TclNewLiteralStringObj(permObj, "0o");
Tcl_AppendToObj(permObj, permString+scanned+1, -1);
code = TclGetIntFromObj(NULL, permObj, &prot);
Tcl_DecrRefCount(permObj);
}
if ((code == TCL_ERROR)
&& TclGetIntFromObj(interp, objv[3], &prot) != TCL_OK) {
return TCL_ERROR;
}
}
}
pipeline = 0;
what = TclGetString(objv[1]);
if (what[0] == '|') {
pipeline = 1;
}
/*
* Open the file or create a process pipeline.
*/
if (!pipeline) {
chan = Tcl_FSOpenFileChannel(interp, objv[1], modeString, prot);
} else {
int mode, seekFlag, cmdObjc, binary;
const char **cmdArgv;
if (Tcl_SplitList(interp, what+1, &cmdObjc, &cmdArgv) != TCL_OK) {
return TCL_ERROR;
}
mode = TclGetOpenModeEx(interp, modeString, &seekFlag, &binary);
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:
Tcl_Panic("Tcl_OpenCmd: invalid mode value");
break;
}
chan = Tcl_OpenCommandChannel(interp, cmdObjc, cmdArgv, flags);
if (binary && chan) {
Tcl_SetChannelOption(interp, chan, "-translation", "binary");
}
}
ckfree((char *) cmdArgv);
}
if (chan == NULL) {
return TCL_ERROR;
}
Tcl_RegisterChannel(interp, chan);
Tcl_AppendResult(interp, Tcl_GetChannelName(chan), NULL);
return TCL_OK;
}
int
Tcl_RecordAndEvalObj(
Tcl_Interp *interp, /* Token for interpreter in which command will
* be executed. */
Tcl_Obj *cmdPtr, /* Points to object holding the command to
* record and execute. */
int flags) /* Additional flags. TCL_NO_EVAL means record
* only: don't execute the command.
* TCL_EVAL_GLOBAL means evaluate the script
* in global variable context instead of the
* current procedure. */
{
int result, call = 1;
Tcl_Obj *list[3];
register Tcl_Obj *objPtr;
Tcl_CmdInfo info;
/*
* Do not call [history] if it has been replaced by an empty proc
*/
result = Tcl_GetCommandInfo(interp, "history", &info);
if (result && (info.objProc == TclObjInterpProc)) {
Proc *procPtr = (Proc *)(info.objClientData);
call = (procPtr->cmdPtr->compileProc != TclCompileNoOp);
}
if (call) {
/*
* Do recording by eval'ing a tcl history command: history add $cmd.
*/
TclNewLiteralStringObj(list[0], "history");
TclNewLiteralStringObj(list[1], "add");
list[2] = cmdPtr;
objPtr = Tcl_NewListObj(3, list);
Tcl_IncrRefCount(objPtr);
(void) Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_GLOBAL);
Tcl_DecrRefCount(objPtr);
/*
* One possible failure mode above: exceeding a resource limit.
*/
if (Tcl_LimitExceeded(interp)) {
return TCL_ERROR;
}
}
/*
* Execute the command.
*/
result = TCL_OK;
if (!(flags & TCL_NO_EVAL)) {
result = Tcl_EvalObjEx(interp, cmdPtr, flags & TCL_EVAL_GLOBAL);
}
return result;
}
void
Tcl_Main(
int argc, /* Number of arguments. */
char **argv, /* Array of argument strings. */
Tcl_AppInitProc *appInitProc)
/* Application-specific initialization
* function to call after most initialization
* but before starting to execute commands. */
{
Tcl_Obj *path, *resultPtr, *argvPtr, *commandPtr = NULL;
const char *encodingName = NULL;
PromptType prompt = PROMPT_START;
int code, length, tty, exitCode = 0;
Tcl_Channel inChannel, outChannel, errChannel;
Tcl_Interp *interp;
Tcl_DString appName;
Tcl_FindExecutable(argv[0]);
interp = Tcl_CreateInterp();
Tcl_InitMemory(interp);
/*
* If the application has not already set a startup script, parse the
* first few command line arguments to determine the script path and
* encoding.
*/
if (NULL == Tcl_GetStartupScript(NULL)) {
/*
* Check whether first 3 args (argv[1] - argv[3]) look like
* -encoding ENCODING FILENAME
* or like
* FILENAME
*/
if ((argc > 3) && (0 == strcmp("-encoding", argv[1]))
&& ('-' != argv[3][0])) {
Tcl_SetStartupScript(Tcl_NewStringObj(argv[3], -1), argv[2]);
argc -= 3;
argv += 3;
} else if ((argc > 1) && ('-' != argv[1][0])) {
Tcl_SetStartupScript(Tcl_NewStringObj(argv[1], -1), NULL);
argc--;
argv++;
}
}
path = Tcl_GetStartupScript(&encodingName);
if (path == NULL) {
Tcl_ExternalToUtfDString(NULL, argv[0], -1, &appName);
} else {
const char *pathName = Tcl_GetStringFromObj(path, &length);
Tcl_ExternalToUtfDString(NULL, pathName, length, &appName);
path = Tcl_NewStringObj(Tcl_DStringValue(&appName), -1);
Tcl_SetStartupScript(path, encodingName);
}
Tcl_SetVar(interp, "argv0", Tcl_DStringValue(&appName), TCL_GLOBAL_ONLY);
Tcl_DStringFree(&appName);
argc--;
argv++;
Tcl_SetVar2Ex(interp, "argc", NULL, Tcl_NewIntObj(argc), TCL_GLOBAL_ONLY);
argvPtr = Tcl_NewListObj(0, NULL);
while (argc--) {
Tcl_DString ds;
Tcl_ExternalToUtfDString(NULL, *argv++, -1, &ds);
Tcl_ListObjAppendElement(NULL, argvPtr, Tcl_NewStringObj(
Tcl_DStringValue(&ds), Tcl_DStringLength(&ds)));
Tcl_DStringFree(&ds);
}
Tcl_SetVar2Ex(interp, "argv", NULL, argvPtr, TCL_GLOBAL_ONLY);
/*
* Set the "tcl_interactive" variable.
*/
tty = isatty(0);
Tcl_SetVar(interp, "tcl_interactive", ((path == NULL) && tty) ? "1" : "0",
TCL_GLOBAL_ONLY);
/*
* Invoke application-specific initialization.
*/
Tcl_Preserve(interp);
if (appInitProc(interp) != TCL_OK) {
errChannel = Tcl_GetStdChannel(TCL_STDERR);
if (errChannel) {
Tcl_WriteChars(errChannel,
"application-specific initialization failed: ", -1);
Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp));
Tcl_WriteChars(errChannel, "\n", 1);
}
}
if (Tcl_InterpDeleted(interp)) {
goto done;
}
if (Tcl_LimitExceeded(interp)) {
goto done;
}
/*
* If a script file was specified then just source that file and quit.
* Must fetch it again, as the appInitProc might have reset it.
*/
path = Tcl_GetStartupScript(&encodingName);
if (path != NULL) {
code = Tcl_FSEvalFileEx(interp, path, encodingName);
if (code != TCL_OK) {
errChannel = Tcl_GetStdChannel(TCL_STDERR);
if (errChannel) {
Tcl_Obj *options = Tcl_GetReturnOptions(interp, code);
Tcl_Obj *keyPtr, *valuePtr;
TclNewLiteralStringObj(keyPtr, "-errorinfo");
Tcl_IncrRefCount(keyPtr);
Tcl_DictObjGet(NULL, options, keyPtr, &valuePtr);
Tcl_DecrRefCount(keyPtr);
if (valuePtr) {
Tcl_WriteObj(errChannel, valuePtr);
}
Tcl_WriteChars(errChannel, "\n", 1);
}
exitCode = 1;
}
goto done;
}
/*
* We're running interactively. Source a user-specific startup file if the
* application specified one and if the file exists.
*/
Tcl_SourceRCFile(interp);
if (Tcl_LimitExceeded(interp)) {
goto done;
}
/*
* Process commands from stdin until there's an end-of-file. Note that we
* need to fetch the standard channels again after every eval, since they
* may have been changed.
*/
commandPtr = Tcl_NewObj();
Tcl_IncrRefCount(commandPtr);
/*
* Get a new value for tty if anyone writes to ::tcl_interactive
*/
Tcl_LinkVar(interp, "tcl_interactive", (char *) &tty, TCL_LINK_BOOLEAN);
inChannel = Tcl_GetStdChannel(TCL_STDIN);
outChannel = Tcl_GetStdChannel(TCL_STDOUT);
while ((inChannel != NULL) && !Tcl_InterpDeleted(interp)) {
if (mainLoopProc == NULL) {
if (tty) {
Prompt(interp, &prompt);
if (Tcl_InterpDeleted(interp)) {
break;
}
if (Tcl_LimitExceeded(interp)) {
break;
}
inChannel = Tcl_GetStdChannel(TCL_STDIN);
if (inChannel == NULL) {
break;
}
}
if (Tcl_IsShared(commandPtr)) {
Tcl_DecrRefCount(commandPtr);
commandPtr = Tcl_DuplicateObj(commandPtr);
Tcl_IncrRefCount(commandPtr);
}
length = Tcl_GetsObj(inChannel, commandPtr);
if (length < 0) {
if (Tcl_InputBlocked(inChannel)) {
/*
* This can only happen if stdin has been set to
* non-blocking. In that case cycle back and try again.
* This sets up a tight polling loop (since we have no
* event loop running). If this causes bad CPU hogging, we
* might try toggling the blocking on stdin instead.
*/
continue;
}
/*
* Either EOF, or an error on stdin; we're done
*/
break;
}
/*
* Add the newline removed by Tcl_GetsObj back to the string. Have
* to add it back before testing completeness, because it can make
* a difference. [Bug 1775878]
*/
if (Tcl_IsShared(commandPtr)) {
Tcl_DecrRefCount(commandPtr);
commandPtr = Tcl_DuplicateObj(commandPtr);
Tcl_IncrRefCount(commandPtr);
}
Tcl_AppendToObj(commandPtr, "\n", 1);
if (!TclObjCommandComplete(commandPtr)) {
prompt = PROMPT_CONTINUE;
continue;
}
prompt = PROMPT_START;
/*
* The final newline is syntactically redundant, and causes some
* error messages troubles deeper in, so lop it back off.
*/
Tcl_GetStringFromObj(commandPtr, &length);
Tcl_SetObjLength(commandPtr, --length);
code = Tcl_RecordAndEvalObj(interp, commandPtr, TCL_EVAL_GLOBAL);
inChannel = Tcl_GetStdChannel(TCL_STDIN);
outChannel = Tcl_GetStdChannel(TCL_STDOUT);
errChannel = Tcl_GetStdChannel(TCL_STDERR);
Tcl_DecrRefCount(commandPtr);
commandPtr = Tcl_NewObj();
Tcl_IncrRefCount(commandPtr);
if (code != TCL_OK) {
if (errChannel) {
Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp));
Tcl_WriteChars(errChannel, "\n", 1);
}
} else if (tty) {
resultPtr = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(resultPtr);
Tcl_GetStringFromObj(resultPtr, &length);
if ((length > 0) && outChannel) {
Tcl_WriteObj(outChannel, resultPtr);
Tcl_WriteChars(outChannel, "\n", 1);
}
Tcl_DecrRefCount(resultPtr);
}
} else { /* (mainLoopProc != NULL) */
/*
* If a main loop has been defined while running interactively, we
* want to start a fileevent based prompt by establishing a
* channel handler for stdin.
*/
InteractiveState *isPtr = NULL;
if (inChannel) {
if (tty) {
Prompt(interp, &prompt);
}
isPtr = (InteractiveState *)
ckalloc(sizeof(InteractiveState));
isPtr->input = inChannel;
isPtr->tty = tty;
isPtr->commandPtr = commandPtr;
isPtr->prompt = prompt;
isPtr->interp = interp;
Tcl_UnlinkVar(interp, "tcl_interactive");
Tcl_LinkVar(interp, "tcl_interactive", (char *) &(isPtr->tty),
TCL_LINK_BOOLEAN);
Tcl_CreateChannelHandler(inChannel, TCL_READABLE, StdinProc,
isPtr);
}
mainLoopProc();
mainLoopProc = NULL;
if (inChannel) {
tty = isPtr->tty;
Tcl_UnlinkVar(interp, "tcl_interactive");
Tcl_LinkVar(interp, "tcl_interactive", (char *) &tty,
TCL_LINK_BOOLEAN);
prompt = isPtr->prompt;
commandPtr = isPtr->commandPtr;
if (isPtr->input != NULL) {
Tcl_DeleteChannelHandler(isPtr->input, StdinProc, isPtr);
}
ckfree((char *) isPtr);
}
inChannel = Tcl_GetStdChannel(TCL_STDIN);
outChannel = Tcl_GetStdChannel(TCL_STDOUT);
errChannel = Tcl_GetStdChannel(TCL_STDERR);
}
#ifdef TCL_MEM_DEBUG
/*
* This code here only for the (unsupported and deprecated) [checkmem]
* command.
*/
if (tclMemDumpFileName != NULL) {
mainLoopProc = NULL;
Tcl_DeleteInterp(interp);
}
#endif
}
done:
if ((exitCode == 0) && (mainLoopProc != NULL)
&& !Tcl_LimitExceeded(interp)) {
/*
* If everything has gone OK so far, call the main loop proc, if it
* exists. Packages (like Tk) can set it to start processing events at
* this point.
*/
mainLoopProc();
mainLoopProc = NULL;
}
if (commandPtr != NULL) {
Tcl_DecrRefCount(commandPtr);
}
/*
* Rather than calling exit, invoke the "exit" command so that users can
* replace "exit" with some other command to do additional cleanup on
* exit. The Tcl_EvalObjEx call should never return.
*/
if (!Tcl_InterpDeleted(interp)) {
if (!Tcl_LimitExceeded(interp)) {
Tcl_Obj *cmd = Tcl_ObjPrintf("exit %d", exitCode);
Tcl_IncrRefCount(cmd);
Tcl_EvalObjEx(interp, cmd, TCL_EVAL_GLOBAL);
Tcl_DecrRefCount(cmd);
}
/*
* If Tcl_EvalObjEx returns, trying to eval [exit], something unusual
* is happening. Maybe interp has been deleted; maybe [exit] was
* redefined, maybe we've blown up because of an exceeded limit. We
* still want to cleanup and exit.
*/
if (!Tcl_InterpDeleted(interp)) {
Tcl_DeleteInterp(interp);
}
}
Tcl_SetStartupScript(NULL, NULL);
/*
* If we get here, the master interp has been deleted. Allow its
* destruction with the last matching Tcl_Release.
*/
Tcl_Release(interp);
Tcl_Exit(exitCode);
}
static int
CopyRenameOneFile(
Tcl_Interp *interp, /* Used for error reporting. */
Tcl_Obj *source, /* Pathname of file to copy. May need to be
* translated. */
Tcl_Obj *target, /* Pathname of file to create/overwrite. May
* need to be translated. */
int copyFlag, /* If non-zero, copy files. Otherwise, rename
* them. */
int force) /* If non-zero, overwrite target file if it
* exists. Otherwise, error if target already
* exists. */
{
int result;
Tcl_Obj *errfile, *errorBuffer;
Tcl_Obj *actualSource=NULL; /* If source is a link, then this is the real
* file/directory. */
Tcl_StatBuf sourceStatBuf, targetStatBuf;
if (Tcl_FSConvertToPathType(interp, source) != TCL_OK) {
return TCL_ERROR;
}
if (Tcl_FSConvertToPathType(interp, target) != TCL_OK) {
return TCL_ERROR;
}
errfile = NULL;
errorBuffer = NULL;
result = TCL_ERROR;
/*
* We want to copy/rename links and not the files they point to, so we use
* lstat(). If target is a link, we also want to replace the link and not
* the file it points to, so we also use lstat() on the target.
*/
if (Tcl_FSLstat(source, &sourceStatBuf) != 0) {
errfile = source;
goto done;
}
if (Tcl_FSLstat(target, &targetStatBuf) != 0) {
if (errno != ENOENT) {
errfile = target;
goto done;
}
} else {
if (force == 0) {
errno = EEXIST;
errfile = target;
goto done;
}
/*
* Prevent copying or renaming a file onto itself. On Windows since
* 8.5 we do get an inode number, however the unsigned short field is
* insufficient to accept the Win32 API file id so it is truncated to
* 16 bits and we get collisions. See bug #2015723.
*/
#if !defined(_WIN32) && !defined(__CYGWIN__)
if ((sourceStatBuf.st_ino != 0) && (targetStatBuf.st_ino != 0)) {
if ((sourceStatBuf.st_ino == targetStatBuf.st_ino) &&
(sourceStatBuf.st_dev == targetStatBuf.st_dev)) {
result = TCL_OK;
goto done;
}
}
#endif
/*
* Prevent copying/renaming a file onto a directory and vice-versa.
* This is a policy decision based on the fact that existing
* implementations of copy and rename on all platforms also prevent
* this.
*/
if (S_ISDIR(sourceStatBuf.st_mode)
&& !S_ISDIR(targetStatBuf.st_mode)) {
errno = EISDIR;
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"can't overwrite file \"%s\" with directory \"%s\"",
TclGetString(target), TclGetString(source)));
goto done;
}
if (!S_ISDIR(sourceStatBuf.st_mode)
&& S_ISDIR(targetStatBuf.st_mode)) {
errno = EISDIR;
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"can't overwrite directory \"%s\" with file \"%s\"",
TclGetString(target), TclGetString(source)));
goto done;
}
/*
* The destination exists, but appears to be ok to over-write, and
* -force is given. We now try to adjust permissions to ensure the
* operation succeeds. If we can't adjust permissions, we'll let the
* actual copy/rename return an error later.
*/
{
Tcl_Obj *perm;
int index;
TclNewLiteralStringObj(perm, "u+w");
Tcl_IncrRefCount(perm);
if (TclFSFileAttrIndex(target, "-permissions", &index) == TCL_OK) {
Tcl_FSFileAttrsSet(NULL, index, target, perm);
}
Tcl_DecrRefCount(perm);
}
}
if (copyFlag == 0) {
result = Tcl_FSRenameFile(source, target);
if (result == TCL_OK) {
goto done;
}
if (errno == EINVAL) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"error renaming \"%s\" to \"%s\": trying to rename a"
" volume or move a directory into itself",
TclGetString(source), TclGetString(target)));
goto done;
} else if (errno != EXDEV) {
errfile = target;
goto done;
}
/*
* The rename failed because the move was across file systems. Fall
* through to copy file and then remove original. Note that the
* low-level Tcl_FSRenameFileProc in the filesystem is allowed to
* implement cross-filesystem moves itself, if it desires.
*/
}
actualSource = source;
Tcl_IncrRefCount(actualSource);
/*
* Activate the following block to copy files instead of links. However
* Tcl's semantics currently say we should copy links, so any such change
* should be the subject of careful study on the consequences.
*
* Perhaps there could be an optional flag to 'file copy' to dictate which
* approach to use, with the default being _not_ to have this block
* active.
*/
#if 0
#ifdef S_ISLNK
if (copyFlag && S_ISLNK(sourceStatBuf.st_mode)) {
/*
* We want to copy files not links. Therefore we must follow the link.
* There are two purposes to this 'stat' call here. First we want to
* know if the linked-file/dir actually exists, and second, in the
* block of code which follows, some 20 lines down, we want to check
* if the thing is a file or directory.
*/
if (Tcl_FSStat(source, &sourceStatBuf) != 0) {
/*
* Actual file doesn't exist.
*/
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"error copying \"%s\": the target of this link doesn't"
" exist", TclGetString(source)));
goto done;
} else {
int counter = 0;
while (1) {
Tcl_Obj *path = Tcl_FSLink(actualSource, NULL, 0);
if (path == NULL) {
break;
}
/*
* Now we want to check if this is a relative path, and if so,
* to make it absolute.
*/
if (Tcl_FSGetPathType(path) == TCL_PATH_RELATIVE) {
Tcl_Obj *abs = Tcl_FSJoinToPath(actualSource, 1, &path);
if (abs == NULL) {
break;
}
Tcl_IncrRefCount(abs);
Tcl_DecrRefCount(path);
path = abs;
}
Tcl_DecrRefCount(actualSource);
actualSource = path;
counter++;
/*
* Arbitrary limit of 20 links to follow.
*/
if (counter > 20) {
/*
* Too many links.
*/
Tcl_SetErrno(EMLINK);
errfile = source;
goto done;
}
}
/* Now 'actualSource' is the correct file */
}
}
#endif /* S_ISLNK */
#endif
if (S_ISDIR(sourceStatBuf.st_mode)) {
result = Tcl_FSCopyDirectory(actualSource, target, &errorBuffer);
if (result != TCL_OK) {
if (errno == EXDEV) {
/*
* The copy failed because we're trying to do a
* cross-filesystem copy. We do this through our Tcl library.
*/
Tcl_Obj *copyCommand, *cmdObj, *opObj;
TclNewObj(copyCommand);
TclNewLiteralStringObj(cmdObj, "::tcl::CopyDirectory");
Tcl_ListObjAppendElement(interp, copyCommand, cmdObj);
if (copyFlag) {
TclNewLiteralStringObj(opObj, "copying");
} else {
TclNewLiteralStringObj(opObj, "renaming");
}
Tcl_ListObjAppendElement(interp, copyCommand, opObj);
Tcl_ListObjAppendElement(interp, copyCommand, source);
Tcl_ListObjAppendElement(interp, copyCommand, target);
Tcl_IncrRefCount(copyCommand);
result = Tcl_EvalObjEx(interp, copyCommand,
TCL_EVAL_GLOBAL | TCL_EVAL_DIRECT);
Tcl_DecrRefCount(copyCommand);
if (result != TCL_OK) {
/*
* There was an error in the Tcl-level copy. We will pass
* on the Tcl error message and can ensure this by setting
* errfile to NULL
*/
errfile = NULL;
}
} else {
errfile = errorBuffer;
if (Tcl_FSEqualPaths(errfile, source)) {
errfile = source;
} else if (Tcl_FSEqualPaths(errfile, target)) {
errfile = target;
}
}
}
} else {
result = Tcl_FSCopyFile(actualSource, target);
if ((result != TCL_OK) && (errno == EXDEV)) {
result = TclCrossFilesystemCopy(interp, source, target);
}
if (result != TCL_OK) {
/*
* We could examine 'errno' to double-check if the problem was
* with the target, but we checked the source above, so it should
* be quite clear
*/
errfile = target;
}
/*
* We now need to reset the result, because the above call,
* may have left set it. (Ideally we would prefer not to pass
* an interpreter in above, but the channel IO code used by
* TclCrossFilesystemCopy currently requires one)
*/
Tcl_ResetResult(interp);
}
if ((copyFlag == 0) && (result == TCL_OK)) {
if (S_ISDIR(sourceStatBuf.st_mode)) {
result = Tcl_FSRemoveDirectory(source, 1, &errorBuffer);
if (result != TCL_OK) {
errfile = errorBuffer;
if (Tcl_FSEqualPaths(errfile, source) == 0) {
errfile = source;
}
}
} else {
result = Tcl_FSDeleteFile(source);
if (result != TCL_OK) {
errfile = source;
}
}
if (result != TCL_OK) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf("can't unlink \"%s\": %s",
TclGetString(errfile), Tcl_PosixError(interp)));
errfile = NULL;
}
}
done:
if (errfile != NULL) {
Tcl_Obj *errorMsg = Tcl_ObjPrintf("error %s \"%s\"",
(copyFlag ? "copying" : "renaming"), TclGetString(source));
if (errfile != source) {
Tcl_AppendPrintfToObj(errorMsg, " to \"%s\"",
TclGetString(target));
if (errfile != target) {
Tcl_AppendPrintfToObj(errorMsg, ": \"%s\"",
TclGetString(errfile));
}
}
Tcl_AppendPrintfToObj(errorMsg, ": %s", Tcl_PosixError(interp));
Tcl_SetObjResult(interp, errorMsg);
}
if (errorBuffer != NULL) {
Tcl_DecrRefCount(errorBuffer);
}
if (actualSource != NULL) {
Tcl_DecrRefCount(actualSource);
}
return result;
}
void
TclSetupEnv(
Tcl_Interp *interp) /* Interpreter whose "env" array is to be
* managed. */
{
Var *varPtr, *arrayPtr;
Tcl_Obj *varNamePtr;
Tcl_DString envString;
Tcl_HashTable namesHash;
Tcl_HashEntry *hPtr;
Tcl_HashSearch search;
/*
* Synchronize the values in the environ array with the contents of the
* Tcl "env" variable. To do this:
* 1) Remove the trace that fires when the "env" var is updated.
* 2) Find the existing contents of the "env", storing in a hash table.
* 3) Create/update elements for each environ variable, removing
* elements from the hash table as we go.
* 4) Remove the elements for each remaining entry in the hash table,
* which must have existed before yet have no analog in the environ
* variable.
* 5) Add a trace that synchronizes the "env" array.
*/
Tcl_UntraceVar2(interp, "env", NULL,
TCL_GLOBAL_ONLY | TCL_TRACE_WRITES | TCL_TRACE_UNSETS |
TCL_TRACE_READS | TCL_TRACE_ARRAY, EnvTraceProc, NULL);
/*
* Find out what elements are currently in the global env array.
*/
TclNewLiteralStringObj(varNamePtr, "env");
Tcl_IncrRefCount(varNamePtr);
Tcl_InitObjHashTable(&namesHash);
varPtr = TclObjLookupVarEx(interp, varNamePtr, NULL, TCL_GLOBAL_ONLY,
/*msg*/ 0, /*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr);
TclFindArrayPtrElements(varPtr, &namesHash);
/*
* Go through the environment array and transfer its values into Tcl. At
* the same time, remove those elements we add/update from the hash table
* of existing elements, so that after this part processes, that table
* will hold just the parts to remove.
*/
if (environ[0] != NULL) {
int i;
Tcl_MutexLock(&envMutex);
for (i = 0; environ[i] != NULL; i++) {
Tcl_Obj *obj1, *obj2;
char *p1, *p2;
p1 = Tcl_ExternalToUtfDString(NULL, environ[i], -1, &envString);
p2 = strchr(p1, '=');
if (p2 == NULL) {
/*
* This condition seem to happen occasionally under some
* versions of Solaris, or when encoding accidents swallow the
* '='; ignore the entry.
*/
continue;
}
p2++;
p2[-1] = '\0';
obj1 = Tcl_NewStringObj(p1, -1);
obj2 = Tcl_NewStringObj(p2, -1);
Tcl_DStringFree(&envString);
Tcl_IncrRefCount(obj1);
Tcl_IncrRefCount(obj2);
Tcl_ObjSetVar2(interp, varNamePtr, obj1, obj2, TCL_GLOBAL_ONLY);
hPtr = Tcl_FindHashEntry(&namesHash, obj1);
if (hPtr != NULL) {
Tcl_DeleteHashEntry(hPtr);
}
Tcl_DecrRefCount(obj1);
Tcl_DecrRefCount(obj2);
}
Tcl_MutexUnlock(&envMutex);
}
/*
* Delete those elements that existed in the array but which had no
* counterparts in the environment array.
*/
for (hPtr=Tcl_FirstHashEntry(&namesHash, &search); hPtr!=NULL;
hPtr=Tcl_NextHashEntry(&search)) {
Tcl_Obj *elemName = Tcl_GetHashValue(hPtr);
TclObjUnsetVar2(interp, varNamePtr, elemName, TCL_GLOBAL_ONLY);
}
Tcl_DeleteHashTable(&namesHash);
Tcl_DecrRefCount(varNamePtr);
/*
* Re-establish the trace.
*/
Tcl_TraceVar2(interp, "env", NULL,
TCL_GLOBAL_ONLY | TCL_TRACE_WRITES | TCL_TRACE_UNSETS |
TCL_TRACE_READS | TCL_TRACE_ARRAY, EnvTraceProc, NULL);
}
int
Tcl_RecordAndEvalObj(
Tcl_Interp *interp, /* Token for interpreter in which command will
* be executed. */
Tcl_Obj *cmdPtr, /* Points to object holding the command to
* record and execute. */
int flags) /* Additional flags. TCL_NO_EVAL means record
* only: don't execute the command.
* TCL_EVAL_GLOBAL means evaluate the script
* in global variable context instead of the
* current procedure. */
{
int result, call = 1;
Tcl_CmdInfo info;
HistoryObjs *histObjsPtr =
Tcl_GetAssocData(interp, HISTORY_OBJS_KEY, NULL);
/*
* Create the references to the [::history add] command if necessary.
*/
if (histObjsPtr == NULL) {
histObjsPtr = Tcl_Alloc(sizeof(HistoryObjs));
TclNewLiteralStringObj(histObjsPtr->historyObj, "::history");
TclNewLiteralStringObj(histObjsPtr->addObj, "add");
Tcl_IncrRefCount(histObjsPtr->historyObj);
Tcl_IncrRefCount(histObjsPtr->addObj);
Tcl_SetAssocData(interp, HISTORY_OBJS_KEY, DeleteHistoryObjs,
histObjsPtr);
}
/*
* Do not call [history] if it has been replaced by an empty proc
*/
result = Tcl_GetCommandInfo(interp, "::history", &info);
if (result && (info.deleteProc == TclProcDeleteProc)) {
Proc *procPtr = (Proc *) info.objClientData;
call = (procPtr->cmdPtr->compileProc != TclCompileNoOp);
}
if (call) {
Tcl_Obj *list[3];
/*
* Do recording by eval'ing a tcl history command: history add $cmd.
*/
list[0] = histObjsPtr->historyObj;
list[1] = histObjsPtr->addObj;
list[2] = cmdPtr;
Tcl_IncrRefCount(cmdPtr);
(void) Tcl_EvalObjv(interp, 3, list, TCL_EVAL_GLOBAL);
Tcl_DecrRefCount(cmdPtr);
/*
* One possible failure mode above: exceeding a resource limit.
*/
if (Tcl_LimitExceeded(interp)) {
return TCL_ERROR;
}
}
/*
* Execute the command.
*/
result = TCL_OK;
if (!(flags & TCL_NO_EVAL)) {
result = Tcl_EvalObjEx(interp, cmdPtr, flags & TCL_EVAL_GLOBAL);
}
return result;
}
