Patch 976520 reworks several of the details involved with

        startup/initialization of the Tcl library, focused on the
        activities of Tcl_FindExecutable().

        * generic/tclIO.c:      Removed bogus claim in comment that
        encoding "iso8859-1" is "built-in" to Tcl.

        * generic/tclInt.h:     Created a new struct ProcessGlobalValue,
        * generic/tclUtil.c:    routines Tcl(Get|Set)ProcessGlobalValue,
        and function type TclInitProcessGlobalValueProc.  Together, these
        take care of the housekeeping for "values" (things that can be
        held in a Tcl_Obj) that are global across a whole process.  That is,
        they are shared among multiple threads, and epoch and mutex
        protection must govern the validity of cached copies maintained
        in each thread.

        * generic/tclNotify.c:  Modified TclInitNotifier() to tolerate
        being called multiple times in the same thread.

        * generic/tclEvent.c:   Dropped the unused argv0 argument to
        TclInitSubsystems().  Removed machinery to unsure only one
        TclInitNotifier() call per thread, now that that is safe.
        Converted Tcl(Get|Set)LibraryPath to use a ProcessGlobalValue,
        and moved them to tclEncoding.c.
        * generic/tclBasic.c:   Updated caller.

        * generic/tclInt.h:     TclpFindExecutable now returns void.
        * unix/tclUnixFile.c:
        * win/tclWinFile.c:
        * win/tclWinPipe.c:

        * generic/tclEncoding.c: Built new encoding search initialization
        on a foundation of ProcessGlobalValues, exposing new routines
        Tcl(Get|Set)EncodingSearchPath.  A cache of a map from encoding name
        to directory pathname keeps track of where encodings are available
        for loading.  Tcl_FindExecutable greatly simplified into just
        three function calls.  The "library path" is now misnamed, as its
        only remaining purpose is as a foundation for the default encoding
        search path.

        * generic/tclInterp.c:  Inlined the initScript that is evaluated
        by Tcl_Init().  Added verification after initScript evaluation
        that Tcl can find its installed *.enc files, and that it has
        initialized [encoding system] in agreement with what the environment
        expects.  [tclInit] no longer driven by the value of $::tcl_libPath;
        it largely constructs its own search path now, rather than attempt
        to share one with the encoding system.

        * unix/tclUnixInit.c:   TclpSetInitialEncodings factored so that a new
        * win/tclWinInit.c:     routine TclpGetEncodingNameFromEnvironment
        can reveal that Tcl thinks the [encoding system] should be, even
        when an incomplete encoding search path, or a missing *.enc file
        won't allow that initialization to succeed.  TclpInitLibraryPath
        reworked as an initializer of a ProcessGlobalValue.

        * unix/tclUnixTest.c:   Update implementations of [testfindexecutable],
        [testgetdefenc], and [testsetdefenc].

        * tests/unixInit.test:  Corrected tests to operate properly even
        when a value of TCL_LIBRARY is required to find encodings.

        * generic/tclInt.decls: New internal stubs: TclGetEncodingSearchPath,
        TclSetEncodingSearchPath, TclpGetEncodingNameFromEnvironment.  These
        are candidates for public exposure by future TIPs.

        * generic/tclIntDecls.h:        make genstubs
        * generic/tclStubInit.c:

        * generic/tclTest.c:    Updated [testencoding] to use
        * tests/encoding.test:  Tcl(Get|Set)EncodingSearchPath.  Updated tests.

1 files changed, 7 insertions, 23 deletions

diff --git a/unix/tclUnixTest.c b/unix/tclUnixTest.c
index 955f719..9b5c717 100644
--- a/unix/tclUnixTest.c
+++ b/unix/tclUnixTest.c
@@ -9,7 +9,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclUnixTest.c,v 1.18 2004/06/18 20:38:02 dgp Exp $
+ * RCS: @(#) $Id: tclUnixTest.c,v 1.19 2004/11/30 19:34:51 dgp Exp $
  */
 
 #include "tclInt.h"
@@ -444,7 +444,6 @@ TestfindexecutableCmd(clientData, interp, argc, argv)
     int argc;				/* Number of arguments. */
     CONST char **argv;			/* Argument strings. */
 {
-    char *oldName;
     char *oldNativeName;
     int oldDone;
 
@@ -454,24 +453,19 @@ TestfindexecutableCmd(clientData, interp, argc, argv)
 	return TCL_ERROR;
     }
 
-    oldName       = tclExecutableName;
     oldNativeName = tclNativeExecutableName;
     oldDone       = tclFindExecutableSearchDone;
 
-    tclExecutableName       = NULL;
     tclNativeExecutableName = NULL;
     tclFindExecutableSearchDone = 0;
 
+    Tcl_GetNameOfExecutable();
     Tcl_FindExecutable(argv[1]);
-    if (tclExecutableName != NULL) {
-	Tcl_SetResult(interp, tclExecutableName, TCL_VOLATILE);
-	ckfree(tclExecutableName);
-    }
+    Tcl_SetResult(interp, (char *) Tcl_GetNameOfExecutable(), TCL_VOLATILE);
     if (tclNativeExecutableName != NULL) {
 	ckfree(tclNativeExecutableName);
     }
 
-    tclExecutableName           = oldName;
     tclNativeExecutableName     = oldNativeName;
     tclFindExecutableSearchDone = oldDone;
 
@@ -529,7 +523,7 @@ TestgetopenfileCmd(clientData, interp, argc, argv)
  * TestsetdefencdirCmd --
  *
  *	This procedure implements the "testsetdefenc" command. It is
- *	used to set the value of tclDefaultEncodingDir.
+ *	used to test Tcl_SetDefaultEncodingDir().
  *
  * Results:
  *	A standard Tcl result.
@@ -555,15 +549,7 @@ TestsetdefencdirCmd(clientData, interp, argc, argv)
         return TCL_ERROR;
     }
 
-    if (tclDefaultEncodingDir != NULL) {
-	ckfree(tclDefaultEncodingDir);
-	tclDefaultEncodingDir = NULL;
-    }
-    if (*argv[1] != '\0') {
-	tclDefaultEncodingDir = (char *)
-	    ckalloc((unsigned) strlen(argv[1]) + 1);
-	strcpy(tclDefaultEncodingDir, argv[1]);
-    }
+    Tcl_SetDefaultEncodingDir(argv[1]);
     return TCL_OK;
 }
 
@@ -573,7 +559,7 @@ TestsetdefencdirCmd(clientData, interp, argc, argv)
  * TestgetdefencdirCmd --
  *
  *	This procedure implements the "testgetdefenc" command. It is
- *	used to get the value of tclDefaultEncodingDir.
+ *	used to test Tcl_GetDefaultEncodingDir().
  *
  * Results:
  *	A standard Tcl result.
@@ -598,9 +584,7 @@ TestgetdefencdirCmd(clientData, interp, argc, argv)
         return TCL_ERROR;
     }
 
-    if (tclDefaultEncodingDir != NULL) {
-        Tcl_AppendResult(interp, tclDefaultEncodingDir, (char *) NULL);
-    }
+    Tcl_AppendResult(interp, Tcl_GetDefaultEncodingDir(), (char *) NULL);
     return TCL_OK;
 }