/*
* tclUnixInit.c --
*
* Contains the Unix-specific interpreter initialization functions.
*
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclUnixInit.c,v 1.1.2.7 1999/03/11 06:16:50 welch Exp $
*/
#include "tclInt.h"
#include "tclPort.h"
#include <locale.h>
#if defined(__FreeBSD__)
# include <floatingpoint.h>
#endif
#if defined(__bsdi__)
# include <sys/param.h>
# if _BSDI_VERSION > 199501
# include <dlfcn.h>
# endif
#endif
/*
* The Init script (common to Windows and Unix platforms) is
* defined in tkInitScript.h
*/
#include "tclInitScript.h"
/*
* Default directory in which to look for Tcl library scripts. The
* symbol is defined by Makefile.
*/
static char defaultLibraryDir[sizeof(TCL_LIBRARY)+200] = TCL_LIBRARY;
/*
* Directory in which to look for packages (each package is typically
* installed as a subdirectory of this directory). The symbol is
* defined by Makefile.
*/
static char pkgPath[sizeof(TCL_PACKAGE_PATH)+200] = TCL_PACKAGE_PATH;
typedef struct LocaleTable {
CONST char *lang;
CONST char *encoding;
} LocaleTable;
static CONST LocaleTable localeTable[] = {
{"ja_JP.SJIS", "shiftjis"},
{"ja_JP.EUC", "euc-jp"},
{"ja_JP.JIS", "iso2022-jp"},
{"ja_JP.mscode", "shiftjis"},
{"ja_JP.ujis", "euc-jp"},
{"ja_JP", "euc-jp"},
{"Ja_JP", "shiftjis"},
{"Jp_JP", "shiftjis"},
{"japan", "euc-jp"},
#ifdef hpux
{"japanese", "shiftjis"},
{"ja", "shiftjis"},
#else
{"japanese", "euc-jp"},
{"ja", "euc-jp"},
#endif
{"japanese.sjis", "shiftjis"},
{"japanese.euc", "euc-jp"},
{"japanese-sjis", "shiftjis"},
{"japanese-ujis", "euc-jp"},
{"ko", "euc-kr"},
{"ko_KR", "euc-kr"},
{"ko_KR.EUC", "euc-kr"},
{"ko_KR.euc", "euc-kr"},
{"ko_KR.eucKR", "euc-kr"},
{"korean", "euc-kr"},
{"zh", "cp936"},
{NULL, NULL}
};
/*
*---------------------------------------------------------------------------
*
* TclpInitPlatform --
*
* Initialize all the platform-dependant things like signals and
* floating-point error handling.
*
* Called at process initialization time.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclpInitPlatform()
{
tclPlatform = TCL_PLATFORM_UNIX;
/*
* The code below causes SIGPIPE (broken pipe) errors to
* be ignored. This is needed so that Tcl processes don't
* die if they create child processes (e.g. using "exec" or
* "open") that terminate prematurely. The signal handler
* is only set up when the first interpreter is created;
* after this the application can override the handler with
* a different one of its own, if it wants.
*/
#ifdef SIGPIPE
(void) signal(SIGPIPE, SIG_IGN);
#endif /* SIGPIPE */
#ifdef __FreeBSD__
fpsetround(FP_RN);
fpsetmask(0L);
#endif
#if defined(__bsdi__) && (_BSDI_VERSION > 199501)
/*
* Find local symbols. Don't report an error if we fail.
*/
(void) dlopen (NULL, RTLD_NOW); /* INTL: Native. */
#endif
}
/*
*---------------------------------------------------------------------------
*
* TclpInitLibraryPath --
*
* Initialize the library path at startup. We have a minor
* metacircular problem that we don't know the encoding of the
* operating system but we may need to talk to operating system
* to find the library directories so that we know how to talk to
* the operating system.
*
* We do not know the encoding of the operating system.
* We do know that the encoding is some multibyte encoding.
* In that multibyte encoding, the characters 0..127 are equivalent
* to ascii.
*
* So although we don't know the encoding, it's safe:
* to look for the last slash character in a path in the encoding.
* to append an ascii string to a path.
* to pass those strings back to the operating system.
*
* But any strings that we remembered before we knew the encoding of
* the operating system must be translated to UTF-8 once we know the
* encoding so that the rest of Tcl can use those strings.
*
* This call sets the library path to strings in the unknown native
* encoding. TclpSetInitialEncodings() will translate the library
* path from the native encoding to UTF-8 as soon as it determines
* what the native encoding actually is.
*
* Called at process initialization time.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclpInitLibraryPath(argv0)
CONST char *argv0; /* Name of executable from argv[0] to
* main(). */
{
#define LIBRARY_SIZE 32
Tcl_Obj *pathPtr, *objPtr;
char *str;
Tcl_DString ds;
int pathc;
char **pathv;
char installLib[LIBRARY_SIZE], developLib[LIBRARY_SIZE];
Tcl_DStringInit(&ds);
pathPtr = Tcl_NewObj();
/*
* set installLib lib/tcl[info tclversion]
*
* if {[string match {*[ab]*} [info patchlevel]} {
* set developLib tcl[info patchlevel]/library
* } else {
* set developLib tcl[info tclversion]/library
* }
*/
sprintf(installLib, "lib/tcl%s", TCL_VERSION);
sprintf(developLib, "tcl%s/library",
((TCL_RELEASE_LEVEL < 2) ? TCL_PATCH_LEVEL : TCL_VERSION));
/*
* if {[info exists $env(TCL_LIBRARY)]} {
* lappend dirs $env(TCL_LIBRARY)
* set split [file split $TCL_LIBRARY]
* set tail [lindex [file split $installLib] end]
* if {[string tolower [lindex $split end]] != $tail} {
* set split [lreplace $split end end $tail]
* lappend dirs [eval file join $split]
* }
* }
*/
str = getenv("TCL_LIBRARY"); /* INTL: Native. */
if ((str != NULL) && (str[0] != '\0')) {
/*
* If TCL_LIBRARY is set, search there.
*/
objPtr = Tcl_NewStringObj(str, -1);
Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
Tcl_SplitPath(str, &pathc, &pathv);
if ((pathc > 0) && (strcasecmp(installLib + 4, pathv[pathc - 1]) != 0)) {
/*
* If TCL_LIBRARY is set but refers to a different tcl
* installation than the current version, try fiddling with the
* specified directory to make it refer to this installation by
* removing the old "tclX.Y" and substituting the current
* version string.
*/
pathv[pathc - 1] = installLib + 4;
str = Tcl_JoinPath(pathc, pathv, &ds);
objPtr = Tcl_NewStringObj(str, Tcl_DStringLength(&ds));
Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
Tcl_DStringFree(&ds);
}
ckfree((char *) pathv);
}
/*
* if {[info exists $auto_path]} {
* eval lappend dirs $auto_path
* }
*/
objPtr = TclGetLibraryPath();
if (objPtr != NULL) {
Tcl_ListObjAppendList(NULL, pathPtr, objPtr);
}
/*
* if {[info nameofexecutable] != ""} {
* set dir [file dirname [file dirname [info nameofexecutable]]]
* lappend dirs [file join $dir $installLib]
* lappend dirs [file join [file dirname $dir] $developLib]
* }
*/
Tcl_FindExecutable(argv0);
str = tclExecutableName;
if (str != NULL) {
Tcl_SplitPath(str, &pathc, &pathv);
if (pathc > 1) {
pathv[pathc - 2] = installLib;
str = Tcl_JoinPath(pathc - 1, pathv, &ds);
objPtr = Tcl_NewStringObj(str, Tcl_DStringLength(&ds));
Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
Tcl_DStringFree(&ds);
}
if (pathc > 2) {
pathv[pathc - 3] = developLib;
str = Tcl_JoinPath(pathc - 2, pathv, &ds);
objPtr = Tcl_NewStringObj(str, Tcl_DStringLength(&ds));
Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
Tcl_DStringFree(&ds);
}
ckfree((char *) pathv);
}
/*
* if {$tcl_library != ""} {
* lappend dirs $tcl_library
* }
*/
str = defaultLibraryDir;
if (str[0] != '\0') {
objPtr = Tcl_NewStringObj(str, -1);
Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
}
TclSetLibraryPath(pathPtr);
}
/*
*---------------------------------------------------------------------------
*
* TclpSetInitialEncodings --
*
* Based on the locale, determine the encoding of the operating
* system and the default encoding for newly opened files.
*
* Called at process initialization time.
*
* Results:
* None.
*
* Side effects:
* The Tcl library path is converted from native encoding to UTF-8.
*
*---------------------------------------------------------------------------
*/
void
TclpSetInitialEncodings()
{
CONST char *locale, *encoding;
int i;
Tcl_Obj *pathPtr;
Tcl_DString ds;
/*
* Retrieve the old locale setting so we can restore it when we are done.
*/
Tcl_DStringInit(&ds);
Tcl_DStringAppend(&ds, setlocale(LC_ALL, NULL), -1);
setlocale(LC_ALL, "");
locale = setlocale(LC_CTYPE, NULL);
if (locale == NULL) {
locale = "C";
}
/*
* Default encoding if locale cannot be identified.
*/
encoding = "iso8859-1";
for (i = 0; localeTable[i].lang != NULL; i++) {
if (strcmp(localeTable[i].lang, locale) == 0) {
encoding = localeTable[i].encoding;
}
}
/*
* Restore the locale settings.
*/
setlocale(LC_ALL, Tcl_DStringValue(&ds));
Tcl_DStringFree(&ds);
Tcl_SetSystemEncoding(NULL, encoding);
/*
* Until the system encoding was actually set, the library path was
* actually in the native multi-byte encoding, and not really UTF-8
* as advertised. We cheated as follows:
*
* 1. It was safe to allow the Tcl_SetSystemEncoding() call to
* append the ASCII chars that make up the encoding's filename to
* the names (in the native encoding) of directories in the library
* path, since all Unix multi-byte encodings have ASCII in the
* beginning.
*
* 2. To open the encoding file, the native bytes in the file name
* were passed to the OS, without translating from UTF-8 to native,
* because the name was already in the native encoding.
*
* Now that the system encoding was actually successfully set,
* translate all the names in the library path to UTF-8. That way,
* next time we search the library path, we'll translate the names
* from UTF-8 to the system encoding which will be the native
* encoding.
*/
pathPtr = TclGetLibraryPath();
if (pathPtr != NULL) {
int objc;
Tcl_Obj **objv;
objc = 0;
Tcl_ListObjGetElements(NULL, pathPtr, &objc, &objv);
for (i = 0; i < objc; i++) {
int length;
char *string;
Tcl_DString ds;
string = Tcl_GetStringFromObj(objv[i], &length);
Tcl_ExternalToUtfDString(NULL, string, length, &ds);
Tcl_SetStringObj(objv[i], Tcl_DStringValue(&ds),
Tcl_DStringLength(&ds));
Tcl_DStringFree(&ds);
}
}
/*
* Keep the iso8859-1 encoding preloaded. The IO package uses it for
* gets on a binary channel.
*/
Tcl_GetEncoding(NULL, "iso8859-1");
}
/*
*---------------------------------------------------------------------------
*
* TclpSetVariables --
*
* Performs platform-specific interpreter initialization related to
* the tcl_library and tcl_platform variables, and other platform-
* specific things.
*
* Results:
* None.
*
* Side effects:
* Sets "tcl_library" and "tcl_platform" Tcl variables.
*
*----------------------------------------------------------------------
*/
void
TclpSetVariables(interp)
Tcl_Interp *interp;
{
#ifndef NO_UNAME
struct utsname name;
#endif
int unameOK;
char *user;
Tcl_DString ds;
Tcl_SetVar(interp, "tcl_library", defaultLibraryDir, TCL_GLOBAL_ONLY);
Tcl_SetVar(interp, "tcl_pkgPath", pkgPath, TCL_GLOBAL_ONLY);
Tcl_SetVar2(interp, "tcl_platform", "platform", "unix", TCL_GLOBAL_ONLY);
unameOK = 0;
#ifndef NO_UNAME
if (uname(&name) >= 0) {
char *native;
unameOK = 1;
native = Tcl_ExternalToUtfDString(NULL, name.sysname, -1, &ds);
Tcl_SetVar2(interp, "tcl_platform", "os", native, TCL_GLOBAL_ONLY);
Tcl_DStringFree(&ds);
/*
* The following code is a special hack to handle differences in
* the way version information is returned by uname. On most
* systems the full version number is available in name.release.
* However, under AIX the major version number is in
* name.version and the minor version number is in name.release.
*/
if ((strchr(name.release, '.') != NULL)
|| !isdigit(UCHAR(name.version[0]))) { /* INTL: digit */
Tcl_SetVar2(interp, "tcl_platform", "osVersion", name.release,
TCL_GLOBAL_ONLY);
} else {
Tcl_SetVar2(interp, "tcl_platform", "osVersion", name.version,
TCL_GLOBAL_ONLY);
Tcl_SetVar2(interp, "tcl_platform", "osVersion", ".",
TCL_GLOBAL_ONLY|TCL_APPEND_VALUE);
Tcl_SetVar2(interp, "tcl_platform", "osVersion", name.release,
TCL_GLOBAL_ONLY|TCL_APPEND_VALUE);
}
Tcl_SetVar2(interp, "tcl_platform", "machine", name.machine,
TCL_GLOBAL_ONLY);
}
#endif
if (!unameOK) {
Tcl_SetVar2(interp, "tcl_platform", "os", "", TCL_GLOBAL_ONLY);
Tcl_SetVar2(interp, "tcl_platform", "osVersion", "", TCL_GLOBAL_ONLY);
Tcl_SetVar2(interp, "tcl_platform", "machine", "", TCL_GLOBAL_ONLY);
}
/*
* Copy USER or LOGNAME environment variable into tcl_platform(user)
*/
Tcl_DStringInit(&ds);
user = TclGetEnv("USER", &ds);
if (user == NULL) {
user = TclGetEnv("LOGNAME", &ds);
if (user == NULL) {
user = "";
}
}
Tcl_SetVar2(interp, "tcl_platform", "user", user, TCL_GLOBAL_ONLY);
Tcl_DStringFree(&ds);
}
/*
*----------------------------------------------------------------------
*
* Tcl_Init --
*
* This procedure is typically invoked by Tcl_AppInit procedures
* to find and source the "init.tcl" script, which should exist
* somewhere on the Tcl library path.
*
* Results:
* Returns a standard Tcl completion code and sets the interp's
* result if there is an error.
*
* Side effects:
* Depends on what's in the init.tcl script.
*
*----------------------------------------------------------------------
*/
int
Tcl_Init(interp)
Tcl_Interp *interp; /* Interpreter to initialize. */
{
Tcl_Obj *pathPtr;
pathPtr = TclGetLibraryPath();
if (pathPtr == NULL) {
pathPtr = Tcl_NewObj();
}
Tcl_SetVar2Ex(interp, "tcl_libPath", NULL, pathPtr, TCL_GLOBAL_ONLY);
return Tcl_Eval(interp, initScript);
}
/*
*----------------------------------------------------------------------
*
* Tcl_SourceRCFile --
*
* This procedure is typically invoked by Tcl_Main of Tk_Main
* procedure to source an application specific rc file into the
* interpreter at startup time.
*
* Results:
* None.
*
* Side effects:
* Depends on what's in the rc script.
*
*----------------------------------------------------------------------
*/
void
Tcl_SourceRCFile(interp)
Tcl_Interp *interp; /* Interpreter to source rc file into. */
{
Tcl_DString temp;
char *fileName;
Tcl_Channel errChannel;
fileName = Tcl_GetVar(interp, "tcl_rcFileName", TCL_GLOBAL_ONLY);
if (fileName != NULL) {
Tcl_Channel c;
char *fullName;
Tcl_DStringInit(&temp);
fullName = Tcl_TranslateFileName(interp, fileName, &temp);
if (fullName == NULL) {
/*
* Couldn't translate the file name (e.g. it referred to a
* bogus user or there was no HOME environment variable).
* Just do nothing.
*/
} else {
/*
* Test for the existence of the rc file before trying to read it.
*/
c = Tcl_OpenFileChannel(NULL, fullName, "r", 0);
if (c != (Tcl_Channel) NULL) {
Tcl_Close(NULL, c);
if (Tcl_EvalFile(interp, fullName) != TCL_OK) {
errChannel = Tcl_GetStdChannel(TCL_STDERR);
if (errChannel) {
Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp));
Tcl_WriteChars(errChannel, "\n", 1);
}
}
}
}
Tcl_DStringFree(&temp);
}
}
/*
*----------------------------------------------------------------------
*
* TclpCheckStackSpace --
*
* Detect if we are about to blow the stack. Called before an
* evaluation can happen when nesting depth is checked.
*
* Results:
* 1 if there is enough stack space to continue; 0 if not.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclpCheckStackSpace()
{
/*
* This function is unimplemented on Unix platforms.
*/
return 1;
}