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tkUnixSend.c
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2073 lines (1884 loc) · 59.2 KB
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/*
* tkUnixSend.c --
*
* This file provides functions that implement the "send" command,
* allowing commands to be passed from interpreter to interpreter.
*
* Copyright © 1989-1994 The Regents of the University of California.
* Copyright © 1994-1996 Sun Microsystems, Inc.
* Copyright © 1998-1999 Scriptics Corporation.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tkUnixInt.h"
/*
* The following structure is used to keep track of the interpreters
* registered by this process.
*/
typedef struct RegisteredInterp {
char *name; /* Interpreter's name (malloc-ed). */
Tcl_Interp *interp; /* Interpreter associated with name. NULL
* means that the application was unregistered
* or deleted while a send was in progress to
* it. */
TkDisplay *dispPtr; /* Display for the application. Needed because
* we may need to unregister the interpreter
* after its main window has been deleted. */
struct RegisteredInterp *nextPtr;
/* Next in list of names associated with
* interps in this process. NULL means end of
* list. */
} RegisteredInterp;
/*
* A registry of all interpreters for a display is kept in a property
* "InterpRegistry" on the root window of the display. It is organized as a
* series of zero or more concatenated strings (in no particular order), each
* of the form
* window space name '\0'
* where "window" is the hex id of the comm. window to use to talk to an
* interpreter named "name".
*
* When the registry is being manipulated by an application (e.g. to add or
* remove an entry), it is loaded into memory using a structure of the
* following type:
*/
typedef struct NameRegistry {
TkDisplay *dispPtr; /* Display from which the registry was
* read. */
int locked; /* Non-zero means that the display was locked
* when the property was read in. */
int modified; /* Non-zero means that the property has been
* modified, so it needs to be written out
* when the NameRegistry is closed. */
unsigned long propLength; /* Length of the property, in bytes. */
char *property; /* The contents of the property, or NULL if
* none. See format description above; this is
* *not* terminated by the first null
* character. Dynamically allocated. */
int allocedByX; /* Non-zero means must free property with
* XFree; zero means use ckfree. */
} NameRegistry;
/*
* When a result is being awaited from a sent command, one of the following
* structures is present on a list of all outstanding sent commands. The
* information in the structure is used to process the result when it arrives.
* You're probably wondering how there could ever be multiple outstanding sent
* commands. This could happen if interpreters invoke each other recursively.
* It's unlikely, but possible.
*/
typedef struct PendingCommand {
int serial; /* Serial number expected in result. */
TkDisplay *dispPtr; /* Display being used for communication. */
const char *target; /* Name of interpreter command is being sent
* to. */
Window commWindow; /* Target's communication window. */
Tcl_Interp *interp; /* Interpreter from which the send was
* invoked. */
int code; /* Tcl return code for command will be stored
* here. */
char *result; /* String result for command (malloc'ed), or
* NULL. */
char *errorInfo; /* Information for "errorInfo" variable, or
* NULL (malloc'ed). */
char *errorCode; /* Information for "errorCode" variable, or
* NULL (malloc'ed). */
int gotResponse; /* 1 means a response has been received, 0
* means the command is still outstanding. */
struct PendingCommand *nextPtr;
/* Next in list of all outstanding commands.
* NULL means end of list. */
} PendingCommand;
typedef struct {
PendingCommand *pendingCommands;
/* List of all commands currently being waited
* for. */
RegisteredInterp *interpListPtr;
/* List of all interpreters registered in the
* current process. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
/*
* The information below is used for communication between processes during
* "send" commands. Each process keeps a private window, never even mapped,
* with one property, "Comm". When a command is sent to an interpreter, the
* command is appended to the comm property of the communication window
* associated with the interp's process. Similarly, when a result is returned
* from a sent command, it is also appended to the comm property.
*
* Each command and each result takes the form of ASCII text. For a command,
* the text consists of a zero character followed by several null-terminated
* ASCII strings. The first string consists of the single letter "c".
* Subsequent strings have the form "option value" where the following options
* are supported:
*
* -r commWindow serial
*
* This option means that a response should be sent to the window whose X
* identifier is "commWindow" (in hex), and the response should be
* identified with the serial number given by "serial" (in decimal). If
* this option isn't specified then the send is asynchronous and no
* response is sent.
*
* -n name
*
* "Name" gives the name of the application for which the command is
* intended. This option must be present.
*
* -s script
*
* "Script" is the script to be executed. This option must be present.
*
* The options may appear in any order. The -n and -s options must be present,
* but -r may be omitted for asynchronous RPCs. For compatibility with future
* releases that may add new features, there may be additional options
* present; as long as they start with a "-" character, they will be ignored.
*
* A result also consists of a zero character followed by several null-
* terminated ASCII strings. The first string consists of the single letter
* "r". Subsequent strings have the form "option value" where the following
* options are supported:
*
* -s serial
*
* Identifies the command for which this is the result. It is the same as
* the "serial" field from the -s option in the command. This option must
* be present.
*
* -c code
*
* "Code" is the completion code for the script, in decimal. If the code
* is omitted it defaults to TCL_OK.
*
* -r result
*
* "Result" is the result string for the script, which may be either a
* result or an error message. If this field is omitted then it defaults
* to an empty string.
*
* -i errorInfo
*
* "ErrorInfo" gives a string with which to initialize the errorInfo
* variable. This option may be omitted; it is ignored unless the
* completion code is TCL_ERROR.
*
* -e errorCode
*
* "ErrorCode" gives a string with with to initialize the errorCode
* variable. This option may be omitted; it is ignored unless the
* completion code is TCL_ERROR.
*
* Options may appear in any order, and only the -s option must be present. As
* with commands, there may be additional options besides these; unknown
* options are ignored.
*/
/*
* Other miscellaneous per-process data:
*/
static struct {
int sendSerial; /* The serial number that was used in the last
* "send" command. */
int sendDebug; /* This can be set while debugging to do
* things like skip locking the server. */
} localData = {0, 0};
/*
* Maximum size property that can be read at one time by this module:
*/
#define MAX_PROP_WORDS 100000
/*
* Forward declarations for functions defined later in this file:
*/
static int AppendErrorProc(void *clientData,
XErrorEvent *errorPtr);
static void AppendPropCarefully(Display *display,
Window window, Atom property, char *value,
int length, PendingCommand *pendingPtr);
static Tcl_CmdDeleteProc DeleteProc;
static void RegAddName(NameRegistry *regPtr,
const char *name, Window commWindow);
static void RegClose(NameRegistry *regPtr);
static void RegDeleteName(NameRegistry *regPtr, const char *name);
static Window RegFindName(NameRegistry *regPtr, const char *name);
static NameRegistry * RegOpen(Tcl_Interp *interp,
TkDisplay *dispPtr, int lock);
static void SendEventProc(void *clientData, XEvent *eventPtr);
static int SendInit(Tcl_Interp *interp, TkDisplay *dispPtr);
static Tk_RestrictProc SendRestrictProc;
static int ServerSecure(TkDisplay *dispPtr);
static void UpdateCommWindow(TkDisplay *dispPtr);
static int ValidateName(TkDisplay *dispPtr, const char *name,
Window commWindow, int oldOK);
/*
*----------------------------------------------------------------------
*
* RegOpen --
*
* This function loads the name registry for a display into memory so
* that it can be manipulated.
*
* Results:
* The return value is a pointer to the loaded registry.
*
* Side effects:
* If "lock" is set then the server will be locked. It is the caller's
* responsibility to call RegClose when finished with the registry, so
* that we can write back the registry if needed, unlock the server if
* needed, and free memory.
*
*----------------------------------------------------------------------
*/
static NameRegistry *
RegOpen(
Tcl_Interp *interp, /* Interpreter to use for error reporting
* (errors cause a panic so in fact no error
* is ever returned, but the interpreter is
* needed anyway). */
TkDisplay *dispPtr, /* Display whose name registry is to be
* opened. */
int lock) /* Non-zero means lock the window server when
* opening the registry, so no-one else can
* use the registry until we close it. */
{
NameRegistry *regPtr;
int result, actualFormat;
unsigned long bytesAfter;
Atom actualType;
char **propertyPtr;
Tk_ErrorHandler handler;
if (dispPtr->commTkwin == NULL) {
SendInit(interp, dispPtr);
}
handler = Tk_CreateErrorHandler(dispPtr->display, -1, -1, -1, NULL, NULL);
regPtr = (NameRegistry *)ckalloc(sizeof(NameRegistry));
regPtr->dispPtr = dispPtr;
regPtr->locked = 0;
regPtr->modified = 0;
regPtr->allocedByX = 1;
propertyPtr = ®Ptr->property;
if (lock && !localData.sendDebug) {
XGrabServer(dispPtr->display);
regPtr->locked = 1;
}
/*
* Read the registry property.
*/
result = XGetWindowProperty(dispPtr->display,
RootWindow(dispPtr->display, 0),
dispPtr->registryProperty, 0, MAX_PROP_WORDS,
False, XA_STRING, &actualType, &actualFormat,
®Ptr->propLength, &bytesAfter,
(unsigned char **) propertyPtr);
if (actualType == None) {
regPtr->propLength = 0;
regPtr->property = NULL;
} else if ((result != Success) || (actualFormat != 8)
|| (actualType != XA_STRING)) {
/*
* The property is improperly formed; delete it.
*/
if (regPtr->property != NULL) {
XFree(regPtr->property);
regPtr->propLength = 0;
regPtr->property = NULL;
}
XDeleteProperty(dispPtr->display,
RootWindow(dispPtr->display, 0),
dispPtr->registryProperty);
XSync(dispPtr->display, False);
}
Tk_DeleteErrorHandler(handler);
/*
* Xlib placed an extra null byte after the end of the property, just to
* make sure that it is always NULL-terminated. Be sure to include this
* byte in our count if it's needed to ensure null termination (note: as
* of 8/95 I'm no longer sure why this code is needed; seems like it
* shouldn't be).
*/
if ((regPtr->propLength > 0)
&& (regPtr->property[regPtr->propLength-1] != 0)) {
regPtr->propLength++;
}
return regPtr;
}
/*
*----------------------------------------------------------------------
*
* RegFindName --
*
* Given an open name registry, this function finds an entry with a given
* name, if there is one, and returns information about that entry.
*
* Results:
* The return value is the X identifier for the comm window for the
* application named "name", or None if there is no such entry in the
* registry.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static Window
RegFindName(
NameRegistry *regPtr, /* Pointer to a registry opened with a
* previous call to RegOpen. */
const char *name) /* Name of an application. */
{
char *p;
for (p=regPtr->property ; p-regPtr->property<(int)regPtr->propLength ;) {
char *entry = p;
while ((*p != 0) && (!isspace(UCHAR(*p)))) {
p++;
}
if ((*p != 0) && (strcmp(name, p+1) == 0)) {
unsigned id;
if (sscanf(entry, "%x", &id) == 1) {
/*
* Must cast from an unsigned int to a Window in case we are
* on a 64-bit architecture.
*/
return (Window) id;
}
}
while (*p != 0) {
p++;
}
p++;
}
return None;
}
/*
*----------------------------------------------------------------------
*
* RegDeleteName --
*
* This function deletes the entry for a given name from an open
* registry.
*
* Results:
* None.
*
* Side effects:
* If there used to be an entry named "name" in the registry, then it is
* deleted and the registry is marked as modified so it will be written
* back when closed.
*
*----------------------------------------------------------------------
*/
static void
RegDeleteName(
NameRegistry *regPtr, /* Pointer to a registry opened with a
* previous call to RegOpen. */
const char *name) /* Name of an application. */
{
char *p;
for (p=regPtr->property ; p-regPtr->property<(int)regPtr->propLength ;) {
char *entry = p, *entryName;
while ((*p != 0) && (!isspace(UCHAR(*p)))) {
p++;
}
if (*p != 0) {
p++;
}
entryName = p;
while (*p != 0) {
p++;
}
p++;
if (strcmp(name, entryName) == 0) {
int count;
/*
* Found the matching entry. Copy everything after it down on top
* of it.
*/
count = regPtr->propLength - (p - regPtr->property);
if (count > 0) {
char *src, *dst;
for (src=p , dst=entry ; count>0 ; src++, dst++, count--) {
*dst = *src;
}
}
regPtr->propLength -= p - entry;
regPtr->modified = 1;
return;
}
}
}
/*
*----------------------------------------------------------------------
*
* RegAddName --
*
* Add a new entry to an open registry.
*
* Results:
* None.
*
* Side effects:
* The open registry is expanded; it is marked as modified so that it
* will be written back when closed.
*
*----------------------------------------------------------------------
*/
static void
RegAddName(
NameRegistry *regPtr, /* Pointer to a registry opened with a
* previous call to RegOpen. */
const char *name, /* Name of an application. The caller must
* ensure that this name isn't already
* registered. */
Window commWindow) /* X identifier for comm. window of
* application. */
{
char id[30], *newProp;
int idLength, newBytes;
snprintf(id, sizeof(id), "%x ", (unsigned) commWindow);
idLength = strlen(id);
newBytes = idLength + strlen(name) + 1;
newProp = (char *)ckalloc(regPtr->propLength + newBytes);
strcpy(newProp, id);
strcpy(newProp+idLength, name);
if (regPtr->property != NULL) {
memcpy(newProp + newBytes, regPtr->property, regPtr->propLength);
if (regPtr->allocedByX) {
XFree(regPtr->property);
} else {
ckfree(regPtr->property);
}
}
regPtr->modified = 1;
regPtr->propLength += newBytes;
regPtr->property = newProp;
regPtr->allocedByX = 0;
}
/*
*----------------------------------------------------------------------
*
* RegClose --
*
* This function is called to end a series of operations on a name
* registry.
*
* Results:
* None.
*
* Side effects:
* The registry is written back if it has been modified, and the X server
* is unlocked if it was locked. Memory for the registry is freed, so the
* caller should never use regPtr again.
*
*----------------------------------------------------------------------
*/
static void
RegClose(
NameRegistry *regPtr) /* Pointer to a registry opened with a
* previous call to RegOpen. */
{
Tk_ErrorHandler handler;
handler = Tk_CreateErrorHandler(regPtr->dispPtr->display, -1, -1, -1,
NULL, NULL);
if (regPtr->modified) {
if (!regPtr->locked && !localData.sendDebug) {
Tcl_Panic("The name registry was modified without being locked!");
}
XChangeProperty(regPtr->dispPtr->display,
RootWindow(regPtr->dispPtr->display, 0),
regPtr->dispPtr->registryProperty, XA_STRING, 8,
PropModeReplace, (unsigned char *) regPtr->property,
(int) regPtr->propLength);
}
if (regPtr->locked) {
XUngrabServer(regPtr->dispPtr->display);
}
/*
* After ungrabbing the server, it's important to flush the output
* immediately so that the server sees the ungrab command. Otherwise we
* might do something else that needs to communicate with the server (such
* as invoking a subprocess that needs to do I/O to the screen); if the
* ungrab command is still sitting in our output buffer, we could
* deadlock.
*/
XFlush(regPtr->dispPtr->display);
Tk_DeleteErrorHandler(handler);
if (regPtr->property != NULL) {
if (regPtr->allocedByX) {
XFree(regPtr->property);
} else {
ckfree(regPtr->property);
}
}
ckfree(regPtr);
}
/*
*----------------------------------------------------------------------
*
* ValidateName --
*
* This function checks to see if an entry in the registry is still
* valid.
*
* Results:
* The return value is 1 if the given commWindow exists and its name is
* "name". Otherwise 0 is returned.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
ValidateName(
TkDisplay *dispPtr, /* Display for which to perform the
* validation. */
const char *name, /* The name of an application. */
Window commWindow, /* X identifier for the application's comm.
* window. */
int oldOK) /* Non-zero means that we should consider an
* application to be valid even if it looks
* like an old-style (pre-4.0) one; 0 means
* consider these invalid. */
{
int result, actualFormat;
Tcl_Size argc, i;
unsigned long length, bytesAfter;
Atom actualType;
char *property, **propertyPtr = &property;
Tk_ErrorHandler handler;
const char **argv;
property = NULL;
/*
* Ignore X errors when reading the property (e.g., the window might not
* exist). If an error occurs, result will be some value other than
* Success.
*/
handler = Tk_CreateErrorHandler(dispPtr->display, -1, -1, -1, NULL, NULL);
result = XGetWindowProperty(dispPtr->display, commWindow,
dispPtr->appNameProperty, 0, MAX_PROP_WORDS,
False, XA_STRING, &actualType, &actualFormat,
&length, &bytesAfter, (unsigned char **) propertyPtr);
if ((result == Success) && (actualType == None)) {
XWindowAttributes atts;
/*
* The comm. window exists but the property we're looking for doesn't
* exist. This probably means that the application comes from an older
* version of Tk (< 4.0) that didn't set the property; if this is the
* case, then assume for compatibility's sake that everything's OK.
* However, it's also possible that some random application has
* re-used the window id for something totally unrelated. Check a few
* characteristics of the window, such as its dimensions and mapped
* state, to be sure that it still "smells" like a commWindow.
*/
if (!oldOK
|| !XGetWindowAttributes(dispPtr->display, commWindow, &atts)
|| (atts.width != 1) || (atts.height != 1)
|| (atts.map_state != IsUnmapped)) {
result = 0;
} else {
result = 1;
}
} else if ((result == Success) && (actualFormat == 8)
&& (actualType == XA_STRING)) {
result = 0;
if (Tcl_SplitList(NULL, property, &argc, &argv) == TCL_OK) {
for (i = 0; i < argc; i++) {
if (strcmp(argv[i], name) == 0) {
result = 1;
break;
}
}
ckfree(argv);
}
} else {
result = 0;
}
Tk_DeleteErrorHandler(handler);
if (property != NULL) {
XFree(property);
}
return result;
}
/*
*----------------------------------------------------------------------
*
* ServerSecure --
*
* Check whether a server is secure enough for us to trust Tcl scripts
* arriving via that server.
*
* Results:
* The return value is 1 if the server is secure, which means that
* host-style authentication is turned on but there are no hosts in the
* enabled list. This means that some other form of authorization
* (presumably more secure, such as xauth) is in use.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
ServerSecure(
TkDisplay *dispPtr) /* Display to check. */
{
#ifdef TK_NO_SECURITY
return 1;
#else
XHostAddress *addrPtr;
int numHosts, secure;
Bool enabled;
addrPtr = XListHosts(dispPtr->display, &numHosts, &enabled);
if (!enabled) {
insecure:
secure = 0;
} else if (numHosts == 0) {
secure = 1;
} else {
/*
* Recent versions of X11 have the extra feature of allowing more
* sophisticated authorization checks to be performed than the dozy
* old ones that used to plague xhost usage. However, not all deployed
* versions of Xlib know how to deal with this feature, so this code
* is conditional on having the right #def in place. [Bug 1909931]
*
* Note that at this point we know that there's at least one entry in
* the list returned by XListHosts. However there may be multiple
* entries; as long as each is one of either 'SI:localhost:*' or
* 'SI:localgroup:*' then we will claim to be secure enough.
*/
#ifdef FamilyServerInterpreted
XServerInterpretedAddress *siPtr;
int i;
for (i=0 ; i<numHosts ; i++) {
if (addrPtr[i].family != FamilyServerInterpreted) {
/*
* We don't understand what the X server is letting in, so we
* err on the side of safety.
*/
goto insecure;
}
siPtr = (XServerInterpretedAddress *) addrPtr[0].address;
/*
* We don't check the username or group here. This is because it's
* officially non-portable and we are just making sure there
* aren't silly misconfigurations. (Apparently 'root' is not a
* very good choice, but we still don't put any effort in to spot
* that.) However we do check to see that the constraints are
* imposed against the connecting user and/or group.
*/
if ( !(siPtr->typelength == 9 /* ==strlen("localuser") */
&& !memcmp(siPtr->type, "localuser", 9))
&& !(siPtr->typelength == 10 /* ==strlen("localgroup") */
&& !memcmp(siPtr->type, "localgroup", 10))) {
/*
* The other defined types of server-interpreted controls
* involve particular hosts. These are still insecure for the
* same reasons that classic xhost access is insecure; there's
* just no way to be sure that the users on those systems are
* the ones who should be allowed to connect to this display.
*/
goto insecure;
}
}
secure = 1;
#else
/*
* We don't understand what the X server is letting in, so we err on
* the side of safety.
*/
secure = 0;
#endif /* FamilyServerInterpreted */
}
if (addrPtr != NULL) {
XFree(addrPtr);
}
return secure;
#endif /* TK_NO_SECURITY */
}
/*
*----------------------------------------------------------------------
*
* Tk_SetAppName --
*
* This function is called to associate an ASCII name with a Tk
* application. If the application has already been named, the name
* replaces the old one.
*
* Results:
* The return value is the name actually given to the application. This
* will normally be the same as name, but if name was already in use for
* an application then a name of the form "name #2" will be chosen, with
* a high enough number to make the name unique.
*
* Side effects:
* Registration info is saved, thereby allowing the "send" command to be
* used later to invoke commands in the application. In addition, the
* "send" command is created in the application's interpreter. The
* registration will be removed automatically if the interpreter is
* deleted or the "send" command is removed.
*
*----------------------------------------------------------------------
*/
const char *
Tk_SetAppName(
Tk_Window tkwin, /* Token for any window in the application to
* be named: it is just used to identify the
* application and the display. */
const char *name) /* The name that will be used to refer to the
* interpreter in later "send" commands. Must
* be globally unique. */
{
RegisteredInterp *riPtr, *riPtr2;
Window w;
TkWindow *winPtr = (TkWindow *) tkwin;
TkDisplay *dispPtr = winPtr->dispPtr;
NameRegistry *regPtr;
Tcl_Interp *interp;
const char *actualName;
Tcl_DString dString;
int offset, i;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
interp = winPtr->mainPtr->interp;
if (dispPtr->commTkwin == NULL) {
SendInit(interp, winPtr->dispPtr);
}
/*
* See if the application is already registered; if so, remove its current
* name from the registry.
*/
regPtr = RegOpen(interp, winPtr->dispPtr, 1);
for (riPtr = tsdPtr->interpListPtr; ; riPtr = riPtr->nextPtr) {
if (riPtr == NULL) {
/*
* This interpreter isn't currently registered; create the data
* structure that will be used to register it locally, plus add
* the "send" command to the interpreter.
*/
riPtr = (RegisteredInterp *)ckalloc(sizeof(RegisteredInterp));
riPtr->interp = interp;
riPtr->dispPtr = winPtr->dispPtr;
riPtr->nextPtr = tsdPtr->interpListPtr;
tsdPtr->interpListPtr = riPtr;
riPtr->name = NULL;
Tcl_CreateObjCommand(interp, "send", Tk_SendObjCmd, riPtr, DeleteProc);
if (Tcl_IsSafe(interp)) {
Tcl_HideCommand(interp, "send", "send");
}
break;
}
if (riPtr->interp == interp) {
/*
* The interpreter is currently registered; remove it from the
* name registry.
*/
if (riPtr->name) {
RegDeleteName(regPtr, riPtr->name);
ckfree(riPtr->name);
}
break;
}
}
/*
* Pick a name to use for the application. Use "name" if it's not already
* in use. Otherwise add a suffix such as " #2", trying larger and larger
* numbers until we eventually find one that is unique.
*/
actualName = name;
offset = 0; /* Needed only to avoid "used before
* set" compiler warnings. */
for (i = 1; ; i++) {
if (i > 1) {
if (i == 2) {
Tcl_DStringInit(&dString);
Tcl_DStringAppend(&dString, name, TCL_INDEX_NONE);
Tcl_DStringAppend(&dString, " #", 2);
offset = Tcl_DStringLength(&dString);
Tcl_DStringSetLength(&dString, offset+TCL_INTEGER_SPACE);
actualName = Tcl_DStringValue(&dString);
}
snprintf(Tcl_DStringValue(&dString) + offset, TCL_INTEGER_SPACE, "%d", i);
}
w = RegFindName(regPtr, actualName);
if (w == None) {
break;
}
/*
* The name appears to be in use already, but double-check to be sure
* (perhaps the application died without removing its name from the
* registry?).
*/
if (w == Tk_WindowId(dispPtr->commTkwin)) {
for (riPtr2 = tsdPtr->interpListPtr; riPtr2 != NULL;
riPtr2 = riPtr2->nextPtr) {
if ((riPtr2->interp != interp) &&
(strcmp(riPtr2->name, actualName) == 0)) {
goto nextSuffix;
}
}
RegDeleteName(regPtr, actualName);
break;
} else if (!ValidateName(winPtr->dispPtr, actualName, w, 1)) {
RegDeleteName(regPtr, actualName);
break;
}
nextSuffix:
continue;
}
/*
* We've now got a name to use. Store it in the name registry and in the
* local entry for this application, plus put it in a property on the
* commWindow.
*/
RegAddName(regPtr, actualName, Tk_WindowId(dispPtr->commTkwin));
RegClose(regPtr);
riPtr->name = (char *)ckalloc(strlen(actualName) + 1);
strcpy(riPtr->name, actualName);
if (actualName != name) {
Tcl_DStringFree(&dString);
}
UpdateCommWindow(dispPtr);
return riPtr->name;
}
/*
*--------------------------------------------------------------
*
* Tk_SendObjCmd --
*
* This function is invoked to process the "send" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
int
Tk_SendObjCmd(
TCL_UNUSED(void *), /* Information about sender (only dispPtr
* field is used). */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument strings. */
{
enum {
SEND_ASYNC, SEND_DISPLAYOF, SEND_LAST
};
static const char *const sendOptions[] = {
"-async", "-displayof", "--", NULL
};
const char *stringRep, *destName;
TkWindow *winPtr;
Window commWindow;
PendingCommand pending;
RegisteredInterp *riPtr;
int result, async, i, firstArg, index;
Tk_RestrictProc *prevProc;
void *prevArg;
TkDisplay *dispPtr;
Tcl_Time timeout;
NameRegistry *regPtr;
Tcl_DString request;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
Tcl_Interp *localInterp; /* Used when the interpreter to send the
* command to is within the same process. */
/*
* Process options, if any.
*/
async = 0;
winPtr = (TkWindow *) Tk_MainWindow(interp);
if (winPtr == NULL) {
return TCL_ERROR;
}
/*
* Process the command options.
*/
for (i = 1; i < (objc - 1); i++) {
stringRep = Tcl_GetString(objv[i]);
if (stringRep[0] == '-') {
if (Tcl_GetIndexFromObjStruct(interp, objv[i], sendOptions,
sizeof(char *), "option", 0, &index) != TCL_OK) {
return TCL_ERROR;
}
if (index == SEND_ASYNC) {
++async;
} else if (index == SEND_DISPLAYOF) {
winPtr = (TkWindow *) Tk_NameToWindow(interp, Tcl_GetString(objv[++i]),