Index: ChangeLog
===================================================================
RCS file: /cvsroot/tcl/tcl/ChangeLog,v
retrieving revision 1.1113
diff -u -r1.1113 ChangeLog
--- ChangeLog	8 Jul 2002 22:01:39 -0000	1.1113
+++ ChangeLog	9 Jul 2002 23:33:59 -0000
@@ -1,3 +1,21 @@
+2002-07-09  Don Porter  <dgp@users.sourceforge.net>
+
+	* tests/basic.test:	Cleaned up, constrained, and reduced the
+	* tests/compile.test:	amount of [exec] usage in the test suite.
+	* tests/encoding.test:
+	* tests/env.test:
+	* tests/event.test:
+	* tests/exec.test:
+	* tests/io.test:
+	* tests/ioCmd.test:
+	* tests/regexp.test:
+	* tests/regexpComp.test:
+	* tests/socket.test:
+	* tests/tcltest.test:
+	* tests/unixInit.test:
+	* tests/winDde.test:
+	* tests/winPipe.test:
+
 2002-07-08  Andreas Kupries  <andreas_kupries@users.sourceforge.net>
 
 	* tests/socket.test: Fixed bug #578164. The original reason for
Index: tests/basic.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/basic.test,v
retrieving revision 1.22
diff -u -r1.22 basic.test
--- tests/basic.test	4 Jul 2002 16:52:07 -0000	1.22
+++ tests/basic.test	9 Jul 2002 23:33:59 -0000
@@ -18,19 +18,13 @@
 # RCS: @(#) $Id: basic.test,v 1.22 2002/07/04 16:52:07 msofer Exp $
 #
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
-
-::tcltest::testConstraint testcmdtoken \
-	[llength [info commands testcmdtoken]]
-::tcltest::testConstraint testcmdtrace \
-	[llength [info commands testcmdtrace]]
-::tcltest::testConstraint testcreatecommand \
-	[llength [info commands testcreatecommand]]
-::tcltest::testConstraint exec \
-	[llength [info commands exec]]
+package require tcltest 2
+namespace import -force ::tcltest::*
+
+testConstraint testcmdtoken [llength [info commands testcmdtoken]]
+testConstraint testcmdtrace [llength [info commands testcmdtrace]]
+testConstraint testcreatecommand [llength [info commands testcreatecommand]]
+testConstraint exec [llength [info commands exec]]
 
 # This variable needs to be changed when the major or minor version number for
 # Tcl changes.
@@ -561,10 +555,10 @@
 test basic-45.1 {Tcl_SetRecursionLimit: see interp.test} {emptyTest} {
 } {}
 
-test basic-46.1 {Tcl_AllowExceptions: exception return not allowed} {exec} {
+test basic-46.1 {Tcl_AllowExceptions: exception return not allowed} {stdio} {
     catch {close $f}
     set res [catch {
-	set f [open |[list [info nameofexecutable]] w+]
+	set f [open |[list [interpreter]] w+]
 	fconfigure $f -buffering line
 	puts $f {fconfigure stdout -buffering line}
 	puts $f continue
@@ -591,7 +585,7 @@
 	puts hello
 	break
     } BREAKtest]
-    set res [list [catch {exec [info nameofexecutable] $fName} msg] $msg]
+    set res [list [catch {exec [interpreter] $fName} msg] $msg]
     removeFile BREAKtest
     regsub {"[^ ]*BREAKtest"} $res {"BREAKtest"} res
     set res
@@ -607,7 +601,7 @@
 	patch
 	break
     } BREAKtest]
-    set res [list [catch {exec [info nameofexecutable] $fName} msg] $msg]
+    set res [list [catch {exec [interpreter] $fName} msg] $msg]
     removeFile BREAKtest
     regsub {"[^ ]*BREAKtest"} $res {"BREAKtest"} res
     set res
@@ -620,7 +614,7 @@
     set fName [makeFile {
 	foo [set a 1] [break]
     } BREAKtest]
-    set res [list [catch {exec [info nameofexecutable] $fName} msg] $msg]
+    set res [list [catch {exec [interpreter] $fName} msg] $msg]
     removeFile BREAKtest
     regsub {"[^ ]*BREAKtest"} $res {"BREAKtest"} res
     set res
@@ -635,7 +629,7 @@
     set fName [makeFile {
 	return -code return
     } BREAKtest]
-    set res [list [catch {exec [info nameofexecutable] $fName} msg] $msg]
+    set res [list [catch {exec [interpreter] $fName} msg] $msg]
     removeFile BREAKtest
     regsub {"[^ ]*BREAKtest"} $res {"BREAKtest"} res
     set res
Index: tests/compile.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/compile.test,v
retrieving revision 1.21
diff -u -r1.21 compile.test
--- tests/compile.test	22 Jun 2002 04:19:47 -0000	1.21
+++ tests/compile.test	9 Jul 2002 23:33:59 -0000
@@ -13,10 +13,8 @@
 #
 # RCS: @(#) $Id: compile.test,v 1.21 2002/06/22 04:19:47 dgp Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
 # The following tests are very incomplete, although the rest of the
 # test suite covers this file fairly well.
@@ -265,8 +263,8 @@
 # with TCL_MEM_DEBUG
 #
 # Special test for leak on interp delete [Bug 467523]. 
-::tcltest::testConstraint execCommandExists [expr {[info commands exec] != ""}]
-::tcltest::testConstraint memDebug [expr {[info commands memory] != ""}]
+::tcltest::testConstraint exec [llength [info commands exec]]
+::tcltest::testConstraint memDebug [llength [info commands memory]]
 
 test compile-12.1 {testing literal leak on interp delete} {memDebug} {
     proc getbytes {} {
@@ -288,8 +286,9 @@
     set leak [expr {$end - $tmp}]
 } 0
 # Special test for a memory error in a preliminary fix of [Bug 467523]. 
-# It requires executing a helpfile
-test compile-12.2 {testing error on literal deletion} {memDebug execCommandExists} {
+# It requires executing a helpfile.  Presumably the child process is
+# used because when this test fails, it crashes.
+test compile-12.2 {testing error on literal deletion} {memDebug exec} {
     makeFile {
 	for {set i 0} {$i < 5} {incr i} {
 	    namespace eval bar {}
@@ -298,9 +297,9 @@
 	puts 0
     } source.file
     set res [catch {
-	exec [info nameofexecutable] source.file 
+	exec [interpreter] source.file 
     }]
-    catch {::tcltest::removeFile source.file}
+    catch {removeFile source.file}
     set res
 } 0
 # Test to catch buffer overrun in TclCompileTokens from buf 530320
@@ -314,14 +313,14 @@
 # Special test for underestimating the maxStackSize required for a
 # compiled command. A failure will cause a segfault in the child 
 # process.
-test compile-13.1 {testing underestimate of maxStackSize in list cmd} {execCommandExists} {
+test compile-13.1 {testing underestimate of maxStackSize in list cmd} {exec} {
     set body {set x [list}
     for {set i 0} {$i < 3000} {incr i} {
 	append body " $i"
     }
     append body {]; puts OK}
     regsub BODY {proc crash {} {BODY}; crash} $body script
-    list [catch {exec [info nameofexecutable] << $script} msg] $msg
+    list [catch {exec [interpreter] << $script} msg] $msg
 } {0 OK}
 
 # cleanup
Index: tests/encoding.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/encoding.test,v
retrieving revision 1.14
diff -u -r1.14 encoding.test
--- tests/encoding.test	1 Jul 2002 07:52:02 -0000	1.14
+++ tests/encoding.test	9 Jul 2002 23:33:59 -0000
@@ -10,10 +10,8 @@
 #
 # RCS: @(#) $Id: encoding.test,v 1.14 2002/07/01 07:52:02 dgp Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
 proc toutf {args} {
     global x
@@ -25,12 +23,8 @@
 }
 
 # Some tests require the testencoding command
-
-::tcltest::testConstraint testencoding \
-	[expr {[info commands testencoding] != {}}]
-::tcltest::testConstraint exec \
-	[llength [info commands exec]]
-
+testConstraint testencoding [llength [info commands testencoding]]
+testConstraint exec [llength [info commands exec]]
 
 # TclInitEncodingSubsystem is tested by the rest of this file
 # TclFinalizeEncodingSubsystem is not currently tested
@@ -382,7 +376,7 @@
 	gets $f
     } iso2022.tcl]
 } -body {
-    exec $::tcltest::tcltest $file
+    exec [interpreter] $file
 } -cleanup {
     removeFile iso2022.tcl
 } -result {}
@@ -397,12 +391,12 @@
 	exit
     } iso2022.tcl]
 } -body {
-    viewable [exec $::tcltest::tcltest $file]
+    viewable [exec [interpreter] $file]
 } -cleanup {
     removeFile iso2022.tcl
 } -result "ab\x1b\$B8C\x1b\$(DD%\x1b(Bg (ab\\u001b\$B8C\\u001b\$(DD%\\u001b(Bg)"
 
-test encoding-24.3 {EscapeFreeProc on open channels} {exec} {
+test encoding-24.3 {EscapeFreeProc on open channels} {stdio} {
     # Bug #219314 - if we don't free escape encodings correctly on
     # channel closure, we go boom
     set file [makeFile {
@@ -410,7 +404,7 @@
 	set a "\u4e4e\u4e5e\u4e5f"; # 3 Japanese Kanji letters
 	puts $a
     } iso2022.tcl]
-    set f [open "|[list $::tcltest::tcltest $file]"]
+    set f [open "|[list [interpreter] $file]"]
     fconfigure $f -encoding iso2022-jp
     set count [gets $f line]
     close $f
Index: tests/env.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/env.test,v
retrieving revision 1.15
diff -u -r1.15 env.test
--- tests/env.test	5 Jul 2002 10:38:42 -0000	1.15
+++ tests/env.test	9 Jul 2002 23:33:59 -0000
@@ -13,10 +13,8 @@
 #
 # RCS: @(#) $Id: env.test,v 1.15 2002/07/05 10:38:42 dkf Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
 #
 # These tests will run on any platform (and indeed crashed
@@ -58,7 +56,7 @@
 
 # Some tests require the "exec" command.
 # Skip them if exec is not defined.
-::tcltest::testConstraint execCommandExists [expr {[info commands exec] != ""}]
+testConstraint exec [llength [info commands exec]]
 
 set printenvScript [makeFile {
     proc lrem {listname name} {
@@ -86,9 +84,11 @@
     exit
 } printenv]
 	
+# [exec] is required here to see the actual environment received
+# by child processes.
 proc getenv {} {
     global printenvScript tcltest
-    catch {exec $::tcltest::tcltest $printenvScript} out
+    catch {exec [interpreter] $printenvScript} out
     if {$out == "child process exited abnormally"} {
 	set out {}
     }
@@ -111,30 +111,30 @@
   }
 }
 
-test env-2.1 {adding environment variables} {execCommandExists} {
+test env-2.1 {adding environment variables} {exec} {
     getenv
 } {}
 
 set env(NAME1) "test string"
-test env-2.2 {adding environment variables} {execCommandExists} {
+test env-2.2 {adding environment variables} {exec} {
     getenv
 } {NAME1=test string}
 
 set env(NAME2) "more"
-test env-2.3 {adding environment variables} {execCommandExists} {
+test env-2.3 {adding environment variables} {exec} {
     getenv
 } {NAME1=test string
 NAME2=more}
 
 set env(XYZZY) "garbage"
-test env-2.4 {adding environment variables} {execCommandExists} {
+test env-2.4 {adding environment variables} {exec} {
     getenv
 } {NAME1=test string
 NAME2=more
 XYZZY=garbage}
 
 set env(NAME2) "new value"
-test env-3.1 {changing environment variables} {execCommandExists} {
+test env-3.1 {changing environment variables} {exec} {
     set result [getenv]
     unset env(NAME2)
     set result
@@ -142,28 +142,28 @@
 NAME2=new value
 XYZZY=garbage}
 
-test env-4.1 {unsetting environment variables} {execCommandExists} {
+test env-4.1 {unsetting environment variables} {exec} {
     set result [getenv]
     unset env(NAME1)
     set result
 } {NAME1=test string
 XYZZY=garbage}
 
-test env-4.2 {unsetting environment variables} {execCommandExists} {
+test env-4.2 {unsetting environment variables} {exec} {
     set result [getenv]
     unset env(XYZZY)
     set result
 } {XYZZY=garbage}
 
-test env-4.3 {setting international environment variables} {execCommandExists} {
+test env-4.3 {setting international environment variables} {exec} {
     set env(\ua7) \ub6
     getenv
 } "\ua7=\ub6"
-test env-4.4 {changing international environment variables} {execCommandExists} {
+test env-4.4 {changing international environment variables} {exec} {
     set env(\ua7) \ua7
     getenv
 } "\ua7=\ua7"
-test env-4.5 {unsetting international environment variables} {execCommandExists} {
+test env-4.5 {unsetting international environment variables} {exec} {
     set env(\ub6) \ua7
     unset env(\ua7)
     set result [getenv]
Index: tests/event.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/event.test,v
retrieving revision 1.19
diff -u -r1.19 event.test
--- tests/event.test	5 Jul 2002 10:38:42 -0000	1.19
+++ tests/event.test	9 Jul 2002 23:33:59 -0000
@@ -11,17 +11,12 @@
 #
 # RCS: @(#) $Id: event.test,v 1.19 2002/07/05 10:38:42 dkf Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
-::tcltest::testConstraint testfilehandler \
-	[expr {[info commands testfilehandler] != {}}]
-::tcltest::testConstraint testexithandler \
-	[expr {[info commands testexithandler] != {}}]
-::tcltest::testConstraint testfilewait \
-	[expr {[info commands testfilewait] != {}}]
+testConstraint testfilehandler [llength [info commands testfilehandler]]
+testConstraint testexithandler [llength [info commands testexithandler]]
+testConstraint testfilewait [llength [info commands testfilewait]]
 
 test event-1.1 {Tcl_CreateFileHandler, reading} {testfilehandler} {
     testfilehandler close
@@ -286,7 +281,7 @@
 	vwait a
     }
 
-    list [catch {exec [info nameofexecutable] << $script} errMsg] $errMsg
+    list [catch {exec [interpreter] << $script} errMsg] $errMsg
 } {1 {hello
     while executing
 "error hello"
@@ -305,7 +300,7 @@
 
 
 test event-8.1 {Tcl_CreateExitHandler procedure} {stdio testexithandler} {
-    set child [open |[list [info nameofexecutable]] r+]
+    set child [open |[list [interpreter]] r+]
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; exit"
     flush $child
@@ -318,7 +313,7 @@
 }
 
 test event-9.1 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
-    set child [open |[list [info nameofexecutable]] r+]
+    set child [open |[list [interpreter]] r+]
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; testexithandler delete 41"
     puts $child "testexithandler create 16; exit"
@@ -331,7 +326,7 @@
 even 4
 }
 test event-9.2 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
-    set child [open |[list [info nameofexecutable]] r+]
+    set child [open |[list [interpreter]] r+]
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; testexithandler delete 4"
     puts $child "testexithandler create 16; exit"
@@ -344,7 +339,7 @@
 odd 41
 }
 test event-9.3 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
-    set child [open |[list [info nameofexecutable]] r+]
+    set child [open |[list [interpreter]] r+]
     puts $child "testexithandler create 41; testexithandler create 4"
     puts $child "testexithandler create 6; testexithandler delete 6"
     puts $child "testexithandler create 16; exit"
@@ -357,7 +352,7 @@
 odd 41
 }
 test event-9.4 {Tcl_DeleteExitHandler procedure} {stdio testexithandler} {
-    set child [open |[list [info nameofexecutable]] r+]
+    set child [open |[list [interpreter]] r+]
     puts $child "testexithandler create 41; testexithandler delete 41"
     puts $child "testexithandler create 16; exit"
     flush $child
@@ -368,7 +363,7 @@
 }
 
 test event-10.1 {Tcl_Exit procedure} {stdio} {
-    set child [open |[list [info nameofexecutable]] r+]
+    set child [open |[list [interpreter]] r+]
     puts $child "exit 3"
     list [catch {close $child} msg] $msg [lindex $errorCode 0] \
         [lindex $errorCode 2]
Index: tests/exec.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/exec.test,v
retrieving revision 1.12
diff -u -r1.12 exec.test
--- tests/exec.test	4 Jul 2002 15:46:55 -0000	1.12
+++ tests/exec.test	9 Jul 2002 23:33:59 -0000
@@ -13,14 +13,12 @@
 #
 # RCS: @(#) $Id: exec.test,v 1.12 2002/07/04 15:46:55 andreas_kupries Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
 # All tests require the "exec" command.
 # Skip them if exec is not defined.
-::tcltest::testConstraint execCommandExists [expr {[info commands exec] != ""}]
+testConstraint exec [llength [info commands exec]]
 
 set path(echo) [makeFile {
     puts -nonewline [lindex $argv 0]
@@ -95,46 +93,46 @@
 
 # Basic operations.
 
-test exec-1.1 {basic exec operation} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) a b c
+test exec-1.1 {basic exec operation} {exec} {
+    exec [interpreter] $path(echo) a b c
 } "a b c"
-test exec-1.2 {pipelining} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) a b c d | $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat)
+test exec-1.2 {pipelining} {exec stdio} {
+    exec [interpreter] $path(echo) a b c d | [interpreter] $path(cat) | [interpreter] $path(cat)
 } "a b c d"
-test exec-1.3 {pipelining} {execCommandExists stdio} {
-    set a [exec $::tcltest::tcltest $path(echo) a b c d | $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(wc)]
+test exec-1.3 {pipelining} {exec stdio} {
+    set a [exec [interpreter] $path(echo) a b c d | [interpreter] $path(cat) | [interpreter] $path(wc)]
     list [scan $a "%d %d %d" b c d] $b $c
 } {3 1 4}
 set arg {12345678901234567890123456789012345678901234567890}
 set arg "$arg$arg$arg$arg$arg$arg"
-test exec-1.4 {long command lines} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) $arg
+test exec-1.4 {long command lines} {exec} {
+    exec [interpreter] $path(echo) $arg
 } $arg
 set arg {}
 
 # I/O redirection: input from Tcl command.
 
-test exec-2.1 {redirecting input from immediate source} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) << "Sample text"
+test exec-2.1 {redirecting input from immediate source} {exec stdio} {
+    exec [interpreter] $path(cat) << "Sample text"
 } {Sample text}
-test exec-2.2 {redirecting input from immediate source} {execCommandExists stdio} {
-    exec << "Sample text" $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat)
+test exec-2.2 {redirecting input from immediate source} {exec stdio} {
+    exec << "Sample text" [interpreter] $path(cat) | [interpreter] $path(cat)
 } {Sample text}
-test exec-2.3 {redirecting input from immediate source} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) << "Sample text" | $::tcltest::tcltest $path(cat)
+test exec-2.3 {redirecting input from immediate source} {exec stdio} {
+    exec [interpreter] $path(cat) << "Sample text" | [interpreter] $path(cat)
 } {Sample text}
-test exec-2.4 {redirecting input from immediate source} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat) << "Sample text"
+test exec-2.4 {redirecting input from immediate source} {exec stdio} {
+    exec [interpreter] $path(cat) | [interpreter] $path(cat) << "Sample text"
 } {Sample text}
-test exec-2.5 {redirecting input from immediate source} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) "<<Joined to arrows"
+test exec-2.5 {redirecting input from immediate source} {exec} {
+    exec [interpreter] $path(cat) "<<Joined to arrows"
 } {Joined to arrows}
-test exec-2.6 {redirecting input from immediate source, with UTF} {execCommandExists stdio} {
+test exec-2.6 {redirecting input from immediate source, with UTF} {exec} {
     # If this fails, it may give back:
     # "\uC3\uA9\uC3\uA0\uC3\uBC\uC3\uB1"
     # If it does, this means that the UTF -> external conversion did not 
     # occur before writing out the temp file.
-    exec $::tcltest::tcltest $path(cat) << "\uE9\uE0\uFC\uF1"
+    exec [interpreter] $path(cat) << "\uE9\uE0\uFC\uF1"
 } "\uE9\uE0\uFC\uF1"
 
 # I/O redirection: output to file.
@@ -142,125 +140,125 @@
 set path(gorp.file) [makeFile {} gorp.file]
 removeFile gorp.file
 
-test exec-3.1 {redirecting output to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "Some simple words" > $path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-3.1 {redirecting output to file} {exec} {
+    exec [interpreter] $path(echo) "Some simple words" > $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "Some simple words"
-test exec-3.2 {redirecting output to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "More simple words" | >$path(gorp.file) $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-3.2 {redirecting output to file} {exec stdio} {
+    exec [interpreter] $path(echo) "More simple words" | >$path(gorp.file) [interpreter] $path(cat) | [interpreter] $path(cat)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "More simple words"
-test exec-3.3 {redirecting output to file} {execCommandExists stdio} {
-    exec > $path(gorp.file) $::tcltest::tcltest $path(echo) "Different simple words" | $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-3.3 {redirecting output to file} {exec stdio} {
+    exec > $path(gorp.file) [interpreter] $path(echo) "Different simple words" | [interpreter] $path(cat) | [interpreter] $path(cat)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "Different simple words"
-test exec-3.4 {redirecting output to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "Some simple words" >$path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-3.4 {redirecting output to file} {exec} {
+    exec [interpreter] $path(echo) "Some simple words" >$path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "Some simple words"
-test exec-3.5 {redirecting output to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "First line" >$path(gorp.file)
-    exec $::tcltest::tcltest $path(echo) "Second line" >> $path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-3.5 {redirecting output to file} {exec} {
+    exec [interpreter] $path(echo) "First line" >$path(gorp.file)
+    exec [interpreter] $path(echo) "Second line" >> $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "First line\nSecond line"
-test exec-3.6 {redirecting output to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "First line" >$path(gorp.file)
-    exec $::tcltest::tcltest $path(echo) "Second line" >>$path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-3.6 {redirecting output to file} {exec} {
+    exec [interpreter] $path(echo) "First line" >$path(gorp.file)
+    exec [interpreter] $path(echo) "Second line" >>$path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "First line\nSecond line"
-test exec-3.7 {redirecting output to file} {execCommandExists stdio} {
+test exec-3.7 {redirecting output to file} {exec} {
     set f [open $path(gorp.file) w]
     puts $f "Line 1"
     flush $f
-    exec $::tcltest::tcltest $path(echo) "More text" >@ $f
-    exec $::tcltest::tcltest $path(echo) >@$f "Even more"
+    exec [interpreter] $path(echo) "More text" >@ $f
+    exec [interpreter] $path(echo) >@$f "Even more"
     puts $f "Line 3"
     close $f
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "Line 1\nMore text\nEven more\nLine 3"
 
 # I/O redirection: output and stderr to file.
 
 removeFile gorp.file
 
-test exec-4.1 {redirecting output and stderr to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "test output" >& $path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-4.1 {redirecting output and stderr to file} {exec} {
+    exec [interpreter] $path(echo) "test output" >& $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "test output"
-test exec-4.2 {redirecting output and stderr to file} {execCommandExists stdio} {
-    list [exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" >&$path(gorp.file)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file)]
+test exec-4.2 {redirecting output and stderr to file} {exec} {
+    list [exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" >&$path(gorp.file)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file)]
 } {{} {foo bar}}
-test exec-4.3 {redirecting output and stderr to file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "first line" > $path(gorp.file)
-    list [exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" >>&$path(gorp.file)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file)]
+test exec-4.3 {redirecting output and stderr to file} {exec} {
+    exec [interpreter] $path(echo) "first line" > $path(gorp.file)
+    list [exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" >>&$path(gorp.file)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file)]
 } "{} {first line\nfoo bar}"
-test exec-4.4 {redirecting output and stderr to file} {execCommandExists stdio} {
+test exec-4.4 {redirecting output and stderr to file} {exec} {
     set f [open $path(gorp.file) w]
     puts $f "Line 1"
     flush $f
-    exec $::tcltest::tcltest $path(echo) "More text" >&@ $f
-    exec $::tcltest::tcltest $path(echo) >&@$f "Even more"
+    exec [interpreter] $path(echo) "More text" >&@ $f
+    exec [interpreter] $path(echo) >&@$f "Even more"
     puts $f "Line 3"
     close $f
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "Line 1\nMore text\nEven more\nLine 3"
-test exec-4.5 {redirecting output and stderr to file} {execCommandExists stdio} {
+test exec-4.5 {redirecting output and stderr to file} {exec} {
     set f [open $path(gorp.file) w]
     puts $f "Line 1"
     flush $f
-    exec >&@ $f $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2"
-    exec >&@$f $::tcltest::tcltest $path(sh) -c "$path(echo) xyzzy 1>&2"
+    exec >&@ $f [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2"
+    exec >&@$f [interpreter] $path(sh) -c "$path(echo) xyzzy 1>&2"
     puts $f "Line 3"
     close $f
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } "Line 1\nfoo bar\nxyzzy\nLine 3"
 
 # I/O redirection: input from file.
 
-if { [set ::tcltest::testConstraints(execCommandExists)] } {
-exec $::tcltest::tcltest $path(echo) "Just a few thoughts" > $path(gorp.file)
+if { [set ::tcltest::testConstraints(exec)] } {
+exec [interpreter] $path(echo) "Just a few thoughts" > $path(gorp.file)
 }
-test exec-5.1 {redirecting input from file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) < $path(gorp.file)
+test exec-5.1 {redirecting input from file} {exec} {
+    exec [interpreter] $path(cat) < $path(gorp.file)
 } {Just a few thoughts}
-test exec-5.2 {redirecting input from file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat) < $path(gorp.file)
+test exec-5.2 {redirecting input from file} {exec stdio} {
+    exec [interpreter] $path(cat) | [interpreter] $path(cat) < $path(gorp.file)
 } {Just a few thoughts}
-test exec-5.3 {redirecting input from file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) < $path(gorp.file) | $::tcltest::tcltest $path(cat)
+test exec-5.3 {redirecting input from file} {exec stdio} {
+    exec [interpreter] $path(cat) < $path(gorp.file) | [interpreter] $path(cat)
 } {Just a few thoughts}
-test exec-5.4 {redirecting input from file} {execCommandExists stdio} {
-    exec < $path(gorp.file) $::tcltest::tcltest $path(cat) | $::tcltest::tcltest $path(cat)
+test exec-5.4 {redirecting input from file} {exec stdio} {
+    exec < $path(gorp.file) [interpreter] $path(cat) | [interpreter] $path(cat)
 } {Just a few thoughts}
-test exec-5.5 {redirecting input from file} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) <$path(gorp.file)
+test exec-5.5 {redirecting input from file} {exec} {
+    exec [interpreter] $path(cat) <$path(gorp.file)
 } {Just a few thoughts}
-test exec-5.6 {redirecting input from file} {execCommandExists stdio} {
+test exec-5.6 {redirecting input from file} {exec} {
     set f [open $path(gorp.file) r]
-    set result [exec $::tcltest::tcltest $path(cat) <@ $f]
+    set result [exec [interpreter] $path(cat) <@ $f]
     close $f
     set result
 } {Just a few thoughts}
-test exec-5.7 {redirecting input from file} {execCommandExists stdio} {
+test exec-5.7 {redirecting input from file} {exec} {
     set f [open $path(gorp.file) r]
-    set result [exec <@$f $::tcltest::tcltest $path(cat)]
+    set result [exec <@$f [interpreter] $path(cat)]
     close $f
     set result
 } {Just a few thoughts}
 
 # I/O redirection: standard error through a pipeline.
 
-test exec-6.1 {redirecting stderr through a pipeline} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar" |& $::tcltest::tcltest $path(cat)
+test exec-6.1 {redirecting stderr through a pipeline} {exec stdio} {
+    exec [interpreter] $path(sh) -c "$path(echo) foo bar" |& [interpreter] $path(cat)
 } "foo bar"
-test exec-6.2 {redirecting stderr through a pipeline} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" |& $::tcltest::tcltest $path(cat)
+test exec-6.2 {redirecting stderr through a pipeline} {exec stdio} {
+    exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" |& [interpreter] $path(cat)
 } "foo bar"
-test exec-6.3 {redirecting stderr through a pipeline} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" \
-	|& $::tcltest::tcltest $path(sh) -c "$path(echo) second msg 1>&2 ; $path(cat)" |& $::tcltest::tcltest $path(cat)
+test exec-6.3 {redirecting stderr through a pipeline} {exec stdio} {
+    exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" \
+	|& [interpreter] $path(sh) -c "$path(echo) second msg 1>&2 ; $path(cat)" |& [interpreter] $path(cat)
 } "second msg\nfoo bar"
 
 # I/O redirection: combinations.
@@ -268,12 +266,12 @@
 set path(gorp.file2) [makeFile {} gorp.file2]
 removeFile gorp.file2
 
-test exec-7.1 {multiple I/O redirections} {execCommandExists stdio} {
-    exec << "command input" > $path(gorp.file2) $::tcltest::tcltest $path(cat) < $path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file2)
+test exec-7.1 {multiple I/O redirections} {exec} {
+    exec << "command input" > $path(gorp.file2) [interpreter] $path(cat) < $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file2)
 } {Just a few thoughts}
-test exec-7.2 {multiple I/O redirections} {execCommandExists stdio} {
-    exec < $path(gorp.file) << "command input" $::tcltest::tcltest $path(cat)
+test exec-7.2 {multiple I/O redirections} {exec} {
+    exec < $path(gorp.file) << "command input" [interpreter] $path(cat)
 } {command input}
 
 # Long input to command and output from command.
@@ -283,158 +281,158 @@
 set a [concat $a $a $a $a]
 set a [concat $a $a $a $a]
 set a [concat $a $a $a $a]
-test exec-8.1 {long input and output} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(cat) << $a
+test exec-8.1 {long input and output} {exec} {
+    exec [interpreter] $path(cat) << $a
 } $a
 
 # More than 20 arguments to exec.
 
-test exec-8.2 {long input and output} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
+test exec-8.2 {long input and output} {exec} {
+    exec [interpreter] $path(echo) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
 } {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23}
 
 # Commands that return errors.
 
-test exec-9.1 {commands returning errors} {execCommandExists stdio} {
+test exec-9.1 {commands returning errors} {exec} {
     set x [catch {exec gorp456} msg]
     list $x [string tolower $msg] [string tolower $errorCode]
 } {1 {couldn't execute "gorp456": no such file or directory} {posix enoent {no such file or directory}}}
-test exec-9.2 {commands returning errors} {execCommandExists stdio} {
-    string tolower [list [catch {exec $::tcltest::tcltest echo foo | foo123} msg] $msg $errorCode]
+test exec-9.2 {commands returning errors} {exec} {
+    string tolower [list [catch {exec [interpreter] echo foo | foo123} msg] $msg $errorCode]
 } {1 {couldn't execute "foo123": no such file or directory} {posix enoent {no such file or directory}}}
-test exec-9.3 {commands returning errors} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(sleep) 1 | $::tcltest::tcltest $path(exit) 43 | $::tcltest::tcltest $path(sleep) 1} msg] $msg
+test exec-9.3 {commands returning errors} {exec stdio} {
+    list [catch {exec [interpreter] $path(sleep) 1 | [interpreter] $path(exit) 43 | [interpreter] $path(sleep) 1} msg] $msg
 } {1 {child process exited abnormally}}
-test exec-9.4 {commands returning errors} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(exit) 43 | $::tcltest::tcltest $path(echo) "foo bar"} msg] $msg
+test exec-9.4 {commands returning errors} {exec stdio} {
+    list [catch {exec [interpreter] $path(exit) 43 | [interpreter] $path(echo) "foo bar"} msg] $msg
 } {1 {foo bar
 child process exited abnormally}}
-test exec-9.5 {commands returning errors} {execCommandExists stdio} {
-    list [catch {exec gorp456 | $::tcltest::tcltest echo a b c} msg] [string tolower $msg]
+test exec-9.5 {commands returning errors} {exec stdio} {
+    list [catch {exec gorp456 | [interpreter] echo a b c} msg] [string tolower $msg]
 } {1 {couldn't execute "gorp456": no such file or directory}}
-test exec-9.6 {commands returning errors} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(sh) -c "$path(echo) error msg 1>&2"} msg] $msg
+test exec-9.6 {commands returning errors} {exec} {
+    list [catch {exec [interpreter] $path(sh) -c "$path(echo) error msg 1>&2"} msg] $msg
 } {1 {error msg}}
-test exec-9.7 {commands returning errors} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(sh) -c "$path(echo) error msg 1>&2" \
-		     | $::tcltest::tcltest $path(sh) -c "$path(echo) error msg 1>&2"} msg] $msg
+test exec-9.7 {commands returning errors} {exec stdio} {
+    list [catch {exec [interpreter] $path(sh) -c "$path(echo) error msg 1>&2" \
+		     | [interpreter] $path(sh) -c "$path(echo) error msg 1>&2"} msg] $msg
 } {1 {error msg
 error msg}}
 
 set path(err) [makeFile {} err]
 
-test exec-9.8 {commands returning errors} {execCommandExists stdio} {
+test exec-9.8 {commands returning errors} {exec} {
     set f [open $path(err) w]
     puts $f {
 	puts stdout out
 	puts stderr err
     }
     close $f
-    list [catch {exec $::tcltest::tcltest $path(err)} msg] $msg
+    list [catch {exec [interpreter] $path(err)} msg] $msg
 } {1 {out
 err}}
 
 # Errors in executing the Tcl command, as opposed to errors in the
 # processes that are invoked.
 
-test exec-10.1 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.1 {errors in exec invocation} {exec} {
     list [catch {exec} msg] $msg
 } {1 {wrong # args: should be "exec ?switches? arg ?arg ...?"}}
-test exec-10.2 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.2 {errors in exec invocation} {exec} {
     list [catch {exec | cat} msg] $msg
 } {1 {illegal use of | or |& in command}}
-test exec-10.3 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.3 {errors in exec invocation} {exec} {
     list [catch {exec cat |} msg] $msg
 } {1 {illegal use of | or |& in command}}
-test exec-10.4 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.4 {errors in exec invocation} {exec} {
     list [catch {exec cat | | cat} msg] $msg
 } {1 {illegal use of | or |& in command}}
-test exec-10.5 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.5 {errors in exec invocation} {exec} {
     list [catch {exec cat | |& cat} msg] $msg
 } {1 {illegal use of | or |& in command}}
-test exec-10.6 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.6 {errors in exec invocation} {exec} {
     list [catch {exec cat |&} msg] $msg
 } {1 {illegal use of | or |& in command}}
-test exec-10.7 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.7 {errors in exec invocation} {exec} {
     list [catch {exec cat <} msg] $msg
 } {1 {can't specify "<" as last word in command}}
-test exec-10.8 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.8 {errors in exec invocation} {exec} {
     list [catch {exec cat >} msg] $msg
 } {1 {can't specify ">" as last word in command}}
-test exec-10.9 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.9 {errors in exec invocation} {exec} {
     list [catch {exec cat <<} msg] $msg
 } {1 {can't specify "<<" as last word in command}}
-test exec-10.10 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.10 {errors in exec invocation} {exec} {
     list [catch {exec cat >>} msg] $msg
 } {1 {can't specify ">>" as last word in command}}
-test exec-10.11 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.11 {errors in exec invocation} {exec} {
     list [catch {exec cat >&} msg] $msg
 } {1 {can't specify ">&" as last word in command}}
-test exec-10.12 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.12 {errors in exec invocation} {exec} {
     list [catch {exec cat >>&} msg] $msg
 } {1 {can't specify ">>&" as last word in command}}
-test exec-10.13 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.13 {errors in exec invocation} {exec} {
     list [catch {exec cat >@} msg] $msg
 } {1 {can't specify ">@" as last word in command}}
-test exec-10.14 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.14 {errors in exec invocation} {exec} {
     list [catch {exec cat <@} msg] $msg
 } {1 {can't specify "<@" as last word in command}}
-test exec-10.15 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.15 {errors in exec invocation} {exec} {
     list [catch {exec cat < a/b/c} msg] [string tolower $msg]
 } {1 {couldn't read file "a/b/c": no such file or directory}}
-test exec-10.16 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.16 {errors in exec invocation} {exec} {
     list [catch {exec cat << foo > a/b/c} msg] [string tolower $msg]
 } {1 {couldn't write file "a/b/c": no such file or directory}}
-test exec-10.17 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.17 {errors in exec invocation} {exec} {
     list [catch {exec cat << foo > a/b/c} msg] [string tolower $msg]
 } {1 {couldn't write file "a/b/c": no such file or directory}}
 set f [open $path(gorp.file) w]
-test exec-10.18 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.18 {errors in exec invocation} {exec} {
     list [catch {exec cat <@ $f} msg] $msg
 } "1 {channel \"$f\" wasn't opened for reading}"
 close $f
 set f [open $path(gorp.file) r]
-test exec-10.19 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.19 {errors in exec invocation} {exec} {
     list [catch {exec cat >@ $f} msg] $msg
 } "1 {channel \"$f\" wasn't opened for writing}"
 close $f
-test exec-10.20 {errors in exec invocation} {execCommandExists stdio} {
+test exec-10.20 {errors in exec invocation} {exec} {
     list [catch {exec ~non_existent_user/foo/bar} msg] $msg
 } {1 {user "non_existent_user" doesn't exist}}
-test exec-10.21 {errors in exec invocation} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest true | ~xyzzy_bad_user/x | false} msg] $msg
+test exec-10.21 {errors in exec invocation} {exec} {
+    list [catch {exec [interpreter] true | ~xyzzy_bad_user/x | false} msg] $msg
 } {1 {user "xyzzy_bad_user" doesn't exist}}
 
 # Commands in background.
 
-test exec-11.1 {commands in background} {execCommandExists stdio} {
-    set x [lindex [time {exec $::tcltest::tcltest $path(sleep) 2 &}] 0]
+test exec-11.1 {commands in background} {exec} {
+    set x [lindex [time {exec [interpreter] $path(sleep) 2 &}] 0]
     expr $x<1000000
 } 1
-test exec-11.2 {commands in background} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(echo) a &b} msg] $msg
+test exec-11.2 {commands in background} {exec} {
+    list [catch {exec [interpreter] $path(echo) a &b} msg] $msg
 } {0 {a &b}}
-test exec-11.3 {commands in background} {execCommandExists stdio} {
-    llength [exec $::tcltest::tcltest $path(sleep) 1 &]
+test exec-11.3 {commands in background} {exec} {
+    llength [exec [interpreter] $path(sleep) 1 &]
 } 1
-test exec-11.4 {commands in background} {execCommandExists stdio} {
-    llength [exec $::tcltest::tcltest $path(sleep) 1 | $::tcltest::tcltest $path(sleep) 1 | $::tcltest::tcltest $path(sleep) 1 &]
+test exec-11.4 {commands in background} {exec stdio} {
+    llength [exec [interpreter] $path(sleep) 1 | [interpreter] $path(sleep) 1 | [interpreter] $path(sleep) 1 &]
 } 3
-test exec-11.5 {commands in background} {execCommandExists stdio} {
+test exec-11.5 {commands in background} {exec} {
     set f [open $path(gorp.file) w]
     puts $f [format { catch { exec [info nameofexecutable] %s foo & } } $path(echo)]
     close $f
-    string compare "foo" [exec $::tcltest::tcltest $path(gorp.file)]
+    string compare "foo" [exec [interpreter] $path(gorp.file)]
 } 0
 
 # Make sure that background commands are properly reaped when
 # they eventually die.
 
-if { [set ::tcltest::testConstraints(execCommandExists)] } {
-exec $::tcltest::tcltest $path(sleep) 3
+if { [set ::tcltest::testConstraints(exec)] } {
+exec [interpreter] $path(sleep) 3
 }
 test exec-12.1 {reaping background processes} \
-	{execCommandExists stdio unixOnly nonPortable} {
+	{exec unixOnly nonPortable} {
     for {set i 0} {$i < 20} {incr i} {
 	exec echo foo > /dev/null &
     }
@@ -443,7 +441,7 @@
     lindex $msg 0
 } 0
 test exec-12.2 {reaping background processes} \
-	{execCommandExists stdio unixOnly nonPortable} {
+	{exec unixOnly nonPortable} {
     exec sleep 2 | sleep 2 | sleep 2 &
     catch {exec ps | fgrep -i "sleep" | fgrep -i -v fgrep | wc} msg
     set x [lindex $msg 0]
@@ -452,7 +450,7 @@
     list $x [lindex $msg 0]
 } {3 0}
 test exec-12.3 {reaping background processes} \
-	{execCommandExists stdio unixOnly nonPortable} {
+	{exec unixOnly nonPortable} {
     exec sleep 1000 &
     exec sleep 1000 &
     set x [exec ps | fgrep "sleep" | fgrep -v fgrep]
@@ -475,13 +473,13 @@
 
 # Make sure "errorCode" is set correctly.
 
-test exec-13.1 {setting errorCode variable} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(cat) < a/b/c} msg] [string tolower $errorCode]
+test exec-13.1 {setting errorCode variable} {exec} {
+    list [catch {exec [interpreter] $path(cat) < a/b/c} msg] [string tolower $errorCode]
 } {1 {posix enoent {no such file or directory}}}
-test exec-13.2 {setting errorCode variable} {execCommandExists stdio} {
-    list [catch {exec $::tcltest::tcltest $path(cat) > a/b/c} msg] [string tolower $errorCode]
+test exec-13.2 {setting errorCode variable} {exec} {
+    list [catch {exec [interpreter] $path(cat) > a/b/c} msg] [string tolower $errorCode]
 } {1 {posix enoent {no such file or directory}}}
-test exec-13.3 {setting errorCode variable} {execCommandExists stdio} {
+test exec-13.3 {setting errorCode variable} {exec} {
     set x [catch {exec _weird_cmd_} msg]
     list $x [string tolower $msg] [lindex $errorCode 0] \
 	    [string tolower [lrange $errorCode 2 end]]
@@ -489,85 +487,85 @@
 
 # Switches before the first argument
 
-test exec-14.1 {-keepnewline switch} {execCommandExists stdio} {
-    exec -keepnewline $::tcltest::tcltest $path(echo) foo
+test exec-14.1 {-keepnewline switch} {exec} {
+    exec -keepnewline [interpreter] $path(echo) foo
 } "foo\n"
-test exec-14.2 {-keepnewline switch} {execCommandExists stdio} {
+test exec-14.2 {-keepnewline switch} {exec} {
     list [catch {exec -keepnewline} msg] $msg
 } {1 {wrong # args: should be "exec ?switches? arg ?arg ...?"}}
-test exec-14.3 {unknown switch} {execCommandExists stdio} {
+test exec-14.3 {unknown switch} {exec} {
     list [catch {exec -gorp} msg] $msg
 } {1 {bad switch "-gorp": must be -keepnewline or --}}
-test exec-14.4 {-- switch} {execCommandExists stdio} {
+test exec-14.4 {-- switch} {exec} {
     list [catch {exec -- -gorp} msg] [string tolower $msg]
 } {1 {couldn't execute "-gorp": no such file or directory}}
 
 # Redirecting standard error separately from standard output
 
-test exec-15.1 {standard error redirection} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "First line" > $path(gorp.file)
-    list [exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" 2> $path(gorp.file)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file)]
+test exec-15.1 {standard error redirection} {exec} {
+    exec [interpreter] $path(echo) "First line" > $path(gorp.file)
+    list [exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" 2> $path(gorp.file)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file)]
 } {{} {foo bar}}
-test exec-15.2 {standard error redirection} {execCommandExists stdio} {
-    list [exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" \
-		| $::tcltest::tcltest $path(echo) biz baz >$path(gorp.file) 2> $path(gorp.file2)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file2)]
+test exec-15.2 {standard error redirection} {exec stdio} {
+    list [exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" \
+		| [interpreter] $path(echo) biz baz >$path(gorp.file) 2> $path(gorp.file2)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file2)]
 } {{} {biz baz} {foo bar}}
-test exec-15.3 {standard error redirection} {execCommandExists stdio} {
-    list [exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" \
-	        | $::tcltest::tcltest $path(echo) biz baz 2>$path(gorp.file) > $path(gorp.file2)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file)] \
-	    [exec $::tcltest::tcltest $path(cat) $path(gorp.file2)]
+test exec-15.3 {standard error redirection} {exec stdio} {
+    list [exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" \
+	        | [interpreter] $path(echo) biz baz 2>$path(gorp.file) > $path(gorp.file2)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file)] \
+	    [exec [interpreter] $path(cat) $path(gorp.file2)]
 } {{} {foo bar} {biz baz}}
-test exec-15.4 {standard error redirection} {execCommandExists stdio} {
+test exec-15.4 {standard error redirection} {exec} {
     set f [open $path(gorp.file) w]
     puts $f "Line 1"
     flush $f
-    exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" 2>@ $f
+    exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" 2>@ $f
     puts $f "Line 3"
     close $f
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } {Line 1
 foo bar
 Line 3}
-test exec-15.5 {standard error redirection} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(echo) "First line" > $path(gorp.file)
-    exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" 2>> $path(gorp.file)
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+test exec-15.5 {standard error redirection} {exec} {
+    exec [interpreter] $path(echo) "First line" > $path(gorp.file)
+    exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" 2>> $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } {First line
 foo bar}
-test exec-15.6 {standard error redirection} {execCommandExists stdio} {
-    exec $::tcltest::tcltest $path(sh) -c "$path(echo) foo bar 1>&2" > $path(gorp.file2) 2> $path(gorp.file) \
-	    >& $path(gorp.file) 2> $path(gorp.file2) | $::tcltest::tcltest $path(echo) biz baz
-    list [exec $::tcltest::tcltest $path(cat) $path(gorp.file)] [exec $::tcltest::tcltest $path(cat) $path(gorp.file2)]
+test exec-15.6 {standard error redirection} {exec stdio} {
+    exec [interpreter] $path(sh) -c "$path(echo) foo bar 1>&2" > $path(gorp.file2) 2> $path(gorp.file) \
+	    >& $path(gorp.file) 2> $path(gorp.file2) | [interpreter] $path(echo) biz baz
+    list [exec [interpreter] $path(cat) $path(gorp.file)] [exec [interpreter] $path(cat) $path(gorp.file2)]
 } {{biz baz} {foo bar}}
 
-test exec-16.1 {flush output before exec} {execCommandExists stdio} {
+test exec-16.1 {flush output before exec} {exec} {
     set f [open $path(gorp.file) w]
     puts $f "First line"
-    exec $::tcltest::tcltest $path(echo) "Second line" >@ $f
+    exec [interpreter] $path(echo) "Second line" >@ $f
     puts $f "Third line"
     close $f
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } {First line
 Second line
 Third line}
-test exec-16.2 {flush output before exec} {execCommandExists stdio} {
+test exec-16.2 {flush output before exec} {exec} {
     set f [open $path(gorp.file) w]
     puts $f "First line"
-    exec $::tcltest::tcltest << {puts stderr {Second line}} >&@ $f > $path(gorp.file2)
+    exec [interpreter] << {puts stderr {Second line}} >&@ $f > $path(gorp.file2)
     puts $f "Third line"
     close $f
-    exec $::tcltest::tcltest $path(cat) $path(gorp.file)
+    exec [interpreter] $path(cat) $path(gorp.file)
 } {First line
 Second line
 Third line}
 
 set path(script) [makeFile {} script]
 
-test exec-17.1 { inheriting standard I/O } {execCommandExists stdio} {
+test exec-17.1 { inheriting standard I/O } {exec} {
     set f [open $path(script) w]
     puts $f [format {close stdout
 	set f [open %s w]
@@ -576,7 +574,7 @@
 	close $f
     } $path(gorp.file) $path(echo) $path(sleep)]
     close $f
-    catch {exec $::tcltest::tcltest $path(script)} result
+    catch {exec [interpreter] $path(script)} result
     set f [open $path(gorp.file) r]
     lappend result [read $f]
     close $f
@@ -584,7 +582,7 @@
 } {{foobar
 }}
 
-test exec-18.1 { exec cat deals with weird file names} {execCommandExists} {
+test exec-18.1 { exec cat deals with weird file names} {exec} {
     set f "foo\[\{blah"
     set path(fooblah) [makeFile {} $f]
     set fout [open $path(fooblah) w]
Index: tests/io.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/io.test,v
retrieving revision 1.35
diff -u -r1.35 io.test
--- tests/io.test	4 Jul 2002 15:46:55 -0000	1.35
+++ tests/io.test	9 Jul 2002 23:34:00 -0000
@@ -29,6 +29,7 @@
     namespace import ::tcltest::viewFile
 
 testConstraint testchannel [llength [info commands testchannel]]
+testConstraint exec [llength [info commands exec]]
 
 # You need a *very* special environment to do some tests.  In
 # particular, many file systems do not support large-files...
@@ -1579,7 +1580,7 @@
 
 set path(test3) [makeFile {} test3]
 
-test io-14.3 {Tcl_SetStdChannel & Tcl_GetStdChannel} {stdio} {
+test io-14.3 {Tcl_SetStdChannel & Tcl_GetStdChannel} {exec} {
     set f [open $path(test1) w]
     puts $f [format {
 	close stdin
@@ -1608,7 +1609,7 @@
 } {err
 }}
 # This test relies on the fact that the smallest available fd is used first.
-test io-14.4 {Tcl_SetStdChannel & Tcl_GetStdChannel} {unixOnly} {
+test io-14.4 {Tcl_SetStdChannel & Tcl_GetStdChannel} {exec unixOnly} {
     set f [open $path(test1) w]
     puts $f [format { close stdin
 	close stdout
@@ -2660,7 +2661,7 @@
 	set result ok
     }
 } ok
-test io-29.33 {Tcl_Flush, implicit flush on exit} {stdio} {
+test io-29.33 {Tcl_Flush, implicit flush on exit} {exec} {
     set f [open $path(script) w]
     puts $f [format {
 	set f [open "%s" w]
Index: tests/ioCmd.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/ioCmd.test,v
retrieving revision 1.14
diff -u -r1.14 ioCmd.test
--- tests/ioCmd.test	4 Jul 2002 15:46:55 -0000	1.14
+++ tests/ioCmd.test	9 Jul 2002 23:34:00 -0000
@@ -22,8 +22,6 @@
 removeFile test1
 removeFile pipe
 
-set executable [list [info nameofexecutable]]
-
 test iocmd-1.1 {puts command} {
    list [catch {puts} msg] $msg
 } {1 {wrong # args: should be "puts ?-nonewline? ?channelId? string"}}
Index: tests/regexp.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/regexp.test,v
retrieving revision 1.21
diff -u -r1.21 regexp.test
--- tests/regexp.test	5 Jul 2002 10:38:43 -0000	1.21
+++ tests/regexp.test	9 Jul 2002 23:34:00 -0000
@@ -433,10 +433,11 @@
     regexp -nocase $x bbba
 } 1
 
-# There is no exec on the Mac ...
-
-test regexp-14.3 {CompileRegexp: regexp cache, empty regexp and empty cache} {unixOrPc} {
-    exec $::tcltest::tcltest [makeFile {puts [regexp {} foo]} junk.tcl]
+testConstraint exec [llength [info commands exec]]
+test regexp-14.3 {CompileRegexp: regexp cache, empty regexp and empty cache} {
+	exec
+} {
+    exec [interpreter] [makeFile {puts [regexp {} foo]} junk.tcl]
 } 1
 
 test regexp-15.1 {regexp -start} {
Index: tests/regexpComp.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/regexpComp.test,v
retrieving revision 1.5
diff -u -r1.5 regexpComp.test
--- tests/regexpComp.test	5 Jul 2002 10:38:43 -0000	1.5
+++ tests/regexpComp.test	9 Jul 2002 23:34:00 -0000
@@ -592,10 +592,11 @@
     }
 } 1
 
-# There is no exec on the Mac ...
-
-test regexp-14.3 {CompileRegexp: regexp cache, empty regexp and empty cache} {unixOrPc} {
-    exec $::tcltest::tcltest [makeFile {puts [regexp {} foo]} junk.tcl]
+testConstraint exec [llength [info commands exec]]
+test regexp-14.3 {CompileRegexp: regexp cache, empty regexp and empty cache} {
+	exec
+} {
+    exec [interpreter] [makeFile {puts [regexp {} foo]} junk.tcl]
 } 1
 
 test regexp-15.1 {regexp -start} {
Index: tests/socket.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/socket.test,v
retrieving revision 1.25
diff -u -r1.25 socket.test
--- tests/socket.test	8 Jul 2002 22:01:41 -0000	1.25
+++ tests/socket.test	9 Jul 2002 23:34:00 -0000
@@ -62,18 +62,13 @@
 # listening at port 2048. If all fails, a message is printed and the tests
 # using the remote server are not performed.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
 # Some tests require the testthread and exec commands
+testConstraint testthread [llength [info commands testthread]]
+testConstraint exec [llength [info commands exec]]
 
-set ::tcltest::testConstraints(testthread) \
-	[expr {[info commands testthread] != {}}]
-set ::tcltest::testConstraints(exec) [expr {[info commands exec] != {}}]
-
-#
 # If remoteServerIP or remoteServerPort are not set, check in the
 # environment variables for externally set values.
 #
@@ -128,7 +123,7 @@
 	    set remoteFile [file join [pwd] [file dirname [info script]] \
 		    remote.tcl]
 	    if {[catch {set remoteProcChan \
-				[open "|[list $::tcltest::tcltest $remoteFile \
+				[open "|[list [interpreter] $remoteFile \
 					-serverIsSilent \
 					-port $remoteServerPort \
 					-address $remoteServerIP]" \
@@ -143,7 +138,7 @@
 		    set doTestsWithRemoteServer 0
 		}
 	    } else {
-		set noRemoteTestReason "$msg $::tcltest::tcltest"
+		set noRemoteTestReason "$msg [interpreter]"
 		set doTestsWithRemoteServer 0
 	    }
 	}
@@ -269,7 +264,7 @@
 	puts $x
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f x
     gets $f listen
     if {[catch {socket 127.0.0.1 $listen} msg]} {
@@ -307,7 +302,7 @@
 	close $f
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f x
     gets $f listen
     global port
@@ -342,7 +337,7 @@
 	close $f
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f x
     if {[catch {socket -myaddr 127.0.0.1 127.0.0.1 2830} sock]} {
         set x $sock
@@ -374,7 +369,7 @@
 	close $f
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f x
     gets $f listen
     if {[catch {socket 127.0.0.1 $listen} sock]} {
@@ -407,7 +402,7 @@
 	close $f
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f x
     gets $f listen
     if {[catch {socket 127.0.0.1 $listen} sock]} {
@@ -459,7 +454,7 @@
 	puts $x
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f
     gets $f listen
     set s [socket 127.0.0.1 $listen]
@@ -500,7 +495,7 @@
 	close $f
 	puts "done $i"
     } script
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f
     gets $f listen
     set s [socket 127.0.0.1 $listen]
@@ -522,7 +517,7 @@
     set f [open $path(script) w]
     puts -nonewline $f "socket -server accept [lindex [fconfigure $s -sockname] 2]"
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f
     after 100
     set x [list [catch {close $f} msg]]
@@ -594,7 +589,7 @@
 	close $f
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r+]
+    set f [open "|[list [interpreter] $path(script)]" r+]
     gets $f
     gets $f listen
     set x [list [catch {socket -server accept $listen} msg] \
@@ -638,7 +633,7 @@
 	puts $x
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r+]
+    set f [open "|[list [interpreter] $path(script)]" r+]
     set x [gets $f]
     gets $f listen
     set s1 [socket 127.0.0.1 $listen]
@@ -679,11 +674,11 @@
 	gets stdin
     }
     close $f
-    set p1 [open "|[list $::tcltest::tcltest $path(script)]" r+]
+    set p1 [open "|[list [interpreter] $path(script)]" r+]
     fconfigure $p1 -buffering line
-    set p2 [open "|[list $::tcltest::tcltest $path(script)]" r+]
+    set p2 [open "|[list [interpreter] $path(script)]" r+]
     fconfigure $p2 -buffering line
-    set p3 [open "|[list $::tcltest::tcltest $path(script)]" r+]
+    set p3 [open "|[list [interpreter] $path(script)]" r+]
     fconfigure $p3 -buffering line
     proc accept {s a p} {
 	fconfigure $s -buffering line
@@ -771,7 +766,7 @@
 	socket 127.0.0.1 $port
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r+]
+    set f [open "|[list [interpreter] $path(script)]" r+]
     proc bgerror args {
 	global x
 	set x $args
@@ -804,7 +799,7 @@
 	after cancel $timer
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f
     gets $f listen
     set s [socket 127.0.0.1 $listen]
@@ -832,7 +827,7 @@
 	after cancel $timer
     }
     close $f
-    set f [open "|[list $::tcltest::tcltest $path(script)]" r]
+    set f [open "|[list [interpreter] $path(script)]" r]
     gets $f
     gets $f listen
     set s [socket 127.0.0.1 $listen]
@@ -1395,7 +1390,7 @@
 set path(script1) [makeFile {} script1]
 set path(script2) [makeFile {} script2]
 
-test socket-12.1 {testing inheritance of server sockets} {socket exec} {
+test socket-12.1 {testing inheritance of server sockets} {socket stdio exec} {
     removeFile script1
     removeFile script2
 
@@ -1414,7 +1409,7 @@
     # be closed unless script1 inherited it.
 
     set f [open $path(script2) w]
-    puts $f [list set tcltest $::tcltest::tcltest]
+    puts $f [list set tcltest [interpreter]]
     puts $f [format {
 	set f [socket -server accept 0]
 	puts [lindex [fconfigure $f -sockname] 2]
@@ -1430,8 +1425,8 @@
 	
     # Launch script2 and wait 5 seconds
 
-    ### exec $::tcltest::tcltest script2 &
-    set p [open "|[list $::tcltest::tcltest $path(script2)]" r]
+    ### exec [interpreter] script2 &
+    set p [open "|[list [interpreter] $path(script2)]" r]
     gets $p listen
 
     after 5000 { set ok_to_proceed 1 }
@@ -1451,7 +1446,7 @@
     close $p
     set x
 } {server socket was not inherited}
-test socket-12.2 {testing inheritance of client sockets} {socket exec} {
+test socket-12.2 {testing inheritance of client sockets} {socket stdio exec} {
     removeFile script1
     removeFile script2
 
@@ -1470,7 +1465,7 @@
     # client socket, the socket will still be open.
 
     set f [open $path(script2) w]
-    puts $f [list set tcltest $::tcltest::tcltest]
+    puts $f [list set tcltest [interpreter]]
     puts $f [format {
         gets stdin port
 	set f [socket 127.0.0.1 $port]
@@ -1524,9 +1519,9 @@
     after 10000 [list set failed 1]
 
     # Launch the script2 process
-    ### exec $::tcltest::tcltest script2 &
+    ### exec [interpreter] script2 &
 
-    set p [open "|[list $::tcltest::tcltest $path(script2)]" w]
+    set p [open "|[list [interpreter] $path(script2)]" w]
     puts $p [lindex [fconfigure $server -sockname] 2] ; flush $p
 
     vwait x
@@ -1538,7 +1533,7 @@
     close $p
     set x
 } {client socket was not inherited}
-test socket-12.3 {testing inheritance of accepted sockets} {socket exec} {
+test socket-12.3 {testing inheritance of accepted sockets} {socket stdio exec} {
     removeFile script1
     removeFile script2
 
@@ -1550,7 +1545,7 @@
     close $f
 
     set f [open $path(script2) w]
-    puts $f [list set tcltest $::tcltest::tcltest]
+    puts $f [list set tcltest [interpreter]]
     puts $f [format {
 	set server [socket -server accept 0]
 	puts stdout [lindex [fconfigure $server -sockname] 2]
@@ -1567,8 +1562,8 @@
     # Launch the script2 process and connect to it.  See how long
     # the socket stays open
 
-    ## exec $::tcltest::tcltest script2 &
-    set p [open "|[list $::tcltest::tcltest $path(script2)]" r]
+    ## exec [interpreter] script2 &
+    set p [open "|[list [interpreter] $path(script2)]" r]
     gets $p listen
 
     after 1000 set ok_to_proceed 1
Index: tests/tcltest.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/tcltest.test,v
retrieving revision 1.30
diff -u -r1.30 tcltest.test
--- tests/tcltest.test	3 Jul 2002 19:40:31 -0000	1.30
+++ tests/tcltest.test	9 Jul 2002 23:34:00 -0000
@@ -52,17 +52,19 @@
 } test.tcl
 
 cd [temporaryDirectory]
+testConstraint exec [llength [info commands exec]]
 # test -help
-test tcltest-1.1 {tcltest -help} {unixOrPc} {
+# Child processes because -help [exit]s.
+test tcltest-1.1 {tcltest -help} {exec} {
     set result [catch {exec [interpreter] test.tcl -help} msg]
     set result [catch {runCmd $cmd}]
     list $result [regexp Usage $msg]
 } {1 1} 
-test tcltest-1.2 {tcltest -help -something} {unixOrPc} {
+test tcltest-1.2 {tcltest -help -something} {exec} {
     set result [catch {exec [interpreter] test.tcl -help -something} msg]
     list $result [regexp Usage $msg]
 } {1 1}
-test tcltest-1.3 {tcltest -h} {unixOrPc} {
+test tcltest-1.3 {tcltest -h} {exec} {
     set result [catch {exec [interpreter] test.tcl -h} msg]
     list $result [regexp Usage $msg]
 } {1 0} 
@@ -280,11 +282,11 @@
 	-setup {tcltest::InitConstraints} \
 	-body { lsort [array names ::tcltest::testConstraints] } \
 	-result [lsort {
-    95 98 asyncPipeClose eformat emptyTest hasIsoLocale interactive knownBug
-    mac macCrash macOnly macOrPc macOrUnix macOrWin nonBlockFiles nonPortable
-    notRoot nt pc pcCrash pcOnly root singleTestInterp socket stdio tempNotMac
-    tempNotPc tempNotUnix tempNotWin unix unixCrash unixExecs unixOnly unixOrPc
-    unixOrWin userInteraction win winCrash winOnly
+    95 98 asyncPipeClose eformat emptyTest exec hasIsoLocale interactive
+    knownBug mac macCrash macOnly macOrPc macOrUnix macOrWin nonBlockFiles
+    nonPortable notRoot nt pc pcCrash pcOnly root singleTestInterp socket
+    stdio tempNotMac tempNotPc tempNotUnix tempNotWin unix unixCrash unixExecs
+    unixOnly unixOrPc unixOrWin userInteraction win winCrash winOnly
 }]
 
 # Removed this broken test.  Its usage of [limitConstraints] was not
Index: tests/unixInit.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/unixInit.test,v
retrieving revision 1.26
diff -u -r1.26 unixInit.test
--- tests/unixInit.test	8 May 2002 06:31:50 -0000	1.26
+++ tests/unixInit.test	9 Jul 2002 23:34:00 -0000
@@ -12,13 +12,10 @@
 #
 # RCS: @(#) $Id: unixInit.test,v 1.26 2002/05/08 06:31:50 dgp Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import -force ::tcltest::*
 
-set ::tcltest::testConstraints(notInstalledInTmp) \
-	[string match /tmp/lib/* [info library]]
+testConstraint notInstalledInTmp [string match /tmp/lib/* [info library]]
 if {[info exists env(TCL_LIBRARY)]} {
     set oldlibrary $env(TCL_LIBRARY)
     unset env(TCL_LIBRARY)
@@ -26,32 +23,20 @@
 catch {set oldlang $env(LANG)}
 set env(LANG) C
 
-# Some tests will fail if they are run on a machine that doesn't have
-# this Tcl version installed (as opposed to built) on it.
-if {[catch {
-    set f [open "|[list $::tcltest::tcltest]" w+]
-    exec kill -PIPE [pid $f]
-    close $f
-} msg]} {
-    set ::tcltest::testConstraints(installedTcl) 0
-} else {
-    set ::tcltest::testConstraints(installedTcl) 1
-}
-
-test unixInit-1.1 {TclpInitPlatform: ignore SIGPIPE} {unixOnly installedTcl} {
+test unixInit-1.1 {TclpInitPlatform: ignore SIGPIPE} {unixOnly stdio} {
     set x {}
 
     # Watch out for a race condition here.  If tcltest is too slow to start
     # then we'll kill it before it has a chance to set up its signal handler.
     
-    set f [open "|[list $::tcltest::tcltest]" w+]
+    set f [open "|[list [interpreter]]" w+]
     puts $f "puts hi"
     flush $f
     gets $f
     exec kill -PIPE [pid $f]
     lappend x [catch {close $f}]
 
-    set f [open "|[list $::tcltest::tcltest]" w+]
+    set f [open "|[list [interpreter]]" w+]
     puts $f "puts hi"
     flush $f
     gets $f
@@ -64,11 +49,11 @@
 # This test is really a test of code in tclUnixChan.c, but the
 # channels are set up as part of initialisation of the interpreter so
 # the test seems to me to fit here as well as anywhere else.
-test unixInit-1.2 {initialisation: standard channel type deduction} {unixOnly installedTcl} {
+test unixInit-1.2 {initialisation: standard channel type deduction} {unixOnly stdio} {
     # pipe1 is a connection to a server that reports what port it
     # starts on, and delivers a constant string to the first client to
     # connect to that port before exiting.
-    set pipe1 [open "|[list $::tcltest::tcltest]" r+]
+    set pipe1 [open "|[list [interpreter]]" r+]
     puts $pipe1 {
 	proc accept {channel host port} {
 	    puts $channel {puts [fconfigure stdin -peername]; exit}
@@ -88,7 +73,7 @@
     # These orders will tell it to print out the details about the
     # socket it is taking instructions from, hopefully identifying it
     # as a socket.  Which is what this test is all about.
-    set pipe2 [open "|[list $::tcltest::tcltest <@$sock]" r]
+    set pipe2 [open "|[list [interpreter] <@$sock]" r]
     set result [gets $pipe2]
 
     # Clear any pending data; stops certain kinds of (non-important) errors
@@ -112,7 +97,7 @@
     }
 } {OK}
 
-proc getlibpath "{program [list $::tcltest::tcltest]}" {
+proc getlibpath [list [list program [interpreter]]] {
     set f [open "|[list $program]" w+]
     fconfigure $f -buffering none
     puts $f {puts $tcl_libPath; exit}
@@ -123,8 +108,7 @@
 
 # Some tests require the testgetdefenc command
 
-set ::tcltest::testConstraints(testgetdefenc) \
-	[expr {[info commands testgetdefenc] != {}}]
+testConstraint testgetdefenc [llength [info commands testgetdefenc]]
 
 test unixInit-2.0 {TclpInitLibraryPath: setting tclDefaultEncodingDir} \
 	{unixOnly testgetdefenc} {
@@ -135,19 +119,19 @@
     set path
 } {slappy}
 test unixInit-2.1 {TclpInitLibraryPath: value of installLib, developLib} \
-	{unixOnly installedTcl} {
+	{unixOnly stdio} {
     set path [getlibpath]
 
     set installLib lib/tcl[info tclversion]
     set developLib tcl[info patchlevel]/library
-    set prefix [file dirname [file dirname $::tcltest::tcltest]]
+    set prefix [file dirname [file dirname [interpreter]]]
 
     set x {}
     lappend x [string compare [lindex $path 0] $prefix/$installLib]
     lappend x [string compare [lindex $path 4] [file dirname $prefix]/$developLib]
     set x
 } {0 0}
-test unixInit-2.2 {TclpInitLibraryPath: TCL_LIBRARY} {unixOnly installedTcl} {
+test unixInit-2.2 {TclpInitLibraryPath: TCL_LIBRARY} {unixOnly stdio} {
     # ((str != NULL) && (str[0] != '\0')) 
 
     set env(TCL_LIBRARY) sparkly
@@ -157,7 +141,7 @@
     lindex $path 0
 } "sparkly"
 test unixInit-2.3 {TclpInitLibraryPath: TCL_LIBRARY wrong version} \
-	{unixOnly installedTcl} {
+	{unixOnly stdio} {
     # ((pathc > 0) && (strcasecmp(installLib + 4, pathv[pathc - 1]) != 0))
 
     set env(TCL_LIBRARY) /a/b/tcl1.7
@@ -167,7 +151,7 @@
     lrange $path 0 1
 } [list /a/b/tcl1.7 /a/b/tcl[info tclversion]]
 test unixInit-2.4 {TclpInitLibraryPath: TCL_LIBRARY: INTL} \
-	{unixOnly installedTcl} {
+	{unixOnly stdio} {
     # Child process translates env variable from native encoding.
 
     set env(TCL_LIBRARY) "\xa7"
@@ -182,23 +166,37 @@
     # cannot test
 } {}
 test unixInit-2.6 {TclpInitLibraryPath: executable relative} \
-	{unixOnly installedTcl} {
-    file delete -force /tmp/sparkly
-    file mkdir /tmp/sparkly/bin
-    file copy $::tcltest::tcltest /tmp/sparkly/bin/tcltest
-
-    file mkdir /tmp/sparkly/lib/tcl[info tclversion]
-    close [open /tmp/sparkly/lib/tcl[info tclversion]/init.tcl w]
-
-    set x [lrange [getlibpath /tmp/sparkly/bin/tcltest] 0 1]
-    file delete -force /tmp/sparkly
+	{unixOnly stdio} {
+    makeDirectory tmp
+    makeDirectory [file join tmp sparkly]
+    makeDirectory [file join tmp sparkly bin]
+    file copy [interpreter] [file join [temporaryDirectory] tmp sparkly \
+	    bin tcltest]
+    makeDirectory [file join tmp sparkly lib]
+    makeDirectory [file join tmp sparkly lib tcl[info tclversion]]
+    makeFile {} [file join tmp sparkly lib tcl[info tclversion] init.tcl]
+
+    set x [lrange [getlibpath [file join [temporaryDirectory] tmp sparkly \
+	    bin tcltest]] 0 1]
+    removeFile [file join tmp sparkly lib tcl[info tclversion] init.tcl]
+    removeDirectory [file join tmp sparkly lib tcl[info tclversion]]
+    removeDirectory [file join tmp sparkly lib]
+    removeDirectory [file join tmp sparkly bin]
+    removeDirectory [file join tmp sparkly]
+    removeDirectory tmp
     set x
-} [list /tmp/sparkly/lib/tcl[info tclversion] /tmp/lib/tcl[info tclversion]]
+} [list [temporaryDirectory]/tmp/sparkly/lib/tcl[info tclversion] [temporaryDirectory]/tmp/lib/tcl[info tclversion]]
 test unixInit-2.7 {TclpInitLibraryPath: compiled-in library path} \
 	{emptyTest unixOnly} {
     # would need test command to get defaultLibDir and compare it to
     # [lindex $auto_path end]
 } {}
+#
+# The following two tests write to the directory /tmp/sparkly instead
+# of to [temporaryDirectory].  This is because the failures tested by
+# these tests need paths near the "root" of the file system to present
+# themselves.
+#
 test unixInit-2.8 {TclpInitLibraryPath: all absolute pathtype} {unixOnly notInstalledInTmp} {
     # Checking for Bug 219416
     # When a program that embeds the Tcl library, like tcltest, is
@@ -218,7 +216,7 @@
     file delete -force /tmp/sparkly
     file delete -force /tmp/lib/tcl[info tclversion]
     file mkdir /tmp/sparkly
-    file copy $::tcltest::tcltest /tmp/sparkly/tcltest
+    file copy [interpreter] /tmp/sparkly/tcltest
 
     # Keep any existing /tmp/lib directory
     set deletelib 1
@@ -254,7 +252,7 @@
     file delete -force /tmp/sparkly
     file delete -force /tmp/library
     file mkdir /tmp/sparkly
-    file copy $::tcltest::tcltest /tmp/sparkly/tcltest
+    file copy [interpreter] /tmp/sparkly/tcltest
 
     file mkdir /tmp/library/
     close [open /tmp/library/init.tcl w]
@@ -266,10 +264,10 @@
     set x
 } [list /tmp/lib/tcl[info tclversion] /lib/tcl[info tclversion] \
         /tmp/library /library /tcl[info patchlevel]/library]
-test unixInit-3.1 {TclpSetInitialEncodings} {unixOnly installedTcl} {
+test unixInit-3.1 {TclpSetInitialEncodings} {unixOnly stdio} {
     set env(LANG) C
 
-    set f [open "|[list $::tcltest::tcltest]" w+]
+    set f [open "|[list [interpreter]]" w+]
     fconfigure $f -buffering none
     puts $f {puts [encoding system]; exit}
     set enc [gets $f]
@@ -278,12 +276,12 @@
 
     set enc
 } {iso8859-1}
-test unixInit-3.2 {TclpSetInitialEncodings} {unixOnly installedTcl} {
+test unixInit-3.2 {TclpSetInitialEncodings} {unixOnly stdio} {
     set env(LANG) japanese
     catch {set oldlc_all $env(LC_ALL)}
     set env(LC_ALL) japanese
 
-    set f [open "|[list $::tcltest::tcltest]" w+]
+    set f [open "|[list [interpreter]]" w+]
     fconfigure $f -buffering none
     puts $f {puts [encoding system]; exit}
     set enc [gets $f]
Index: tests/winDde.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/winDde.test,v
retrieving revision 1.11
diff -u -r1.11 winDde.test
--- tests/winDde.test	22 Aug 2001 23:56:14 -0000	1.11
+++ tests/winDde.test	9 Jul 2002 23:34:00 -0000
@@ -59,7 +59,7 @@
     }
     close $f
     
-    set f [open |[list $tcltest::tcltest $::scriptName] r]
+    set f [open |[list [interpreter] $::scriptName] r]
     gets $f
     return $f
 }
@@ -112,7 +112,7 @@
     dde request -binary TclEval self a
 } "foo\x00"
 
-test winDde-4.1 {DDE execute remotely} {pcOnly} {
+test winDde-4.1 {DDE execute remotely} {stdio pcOnly} {
     set a ""
     set child [createChildProcess child]
     dde execute TclEval child {set a "foo"}
@@ -121,7 +121,7 @@
     set a
 } ""
 
-test winDde-4.2 {DDE execute remotely} {pcOnly} {
+test winDde-4.2 {DDE execute remotely} {stdio pcOnly} {
     set a ""
     set child [createChildProcess child]
     dde execute -async TclEval child {set a "foo"}
@@ -130,7 +130,7 @@
     set a
 } ""
 
-test winDde-4.3 {DDE request locally} {pcOnly} {
+test winDde-4.3 {DDE request locally} {stdio pcOnly} {
     set a ""
     set child [createChildProcess child]
     dde execute TclEval child {set a "foo"}
@@ -140,7 +140,7 @@
     set a
 } foo
 
-test winDde-4.4 {DDE eval locally} {pcOnly} {
+test winDde-4.4 {DDE eval locally} {stdio pcOnly} {
     set a ""
     set child [createChildProcess child]
     set a [dde eval child set a "foo"]
Index: tests/winPipe.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/winPipe.test,v
retrieving revision 1.18
diff -u -r1.18 winPipe.test
--- tests/winPipe.test	4 Jul 2002 20:26:08 -0000	1.18
+++ tests/winPipe.test	9 Jul 2002 23:34:01 -0000
@@ -14,10 +14,10 @@
 #
 # RCS: @(#) $Id: winPipe.test,v 1.18 2002/07/04 20:26:08 andreas_kupries Exp $
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest
+namespace import -force ::tcltest::*
+
+testConstraint exec [llength [info commands exec]]
 
 set bindir [file join [pwd] [file dirname [info nameofexecutable]]]
 set cat32 [file join $bindir cat32.exe]
@@ -64,90 +64,90 @@
 set path(stdout) [makeFile {} stdout]
 set path(stderr) [makeFile {} stderr]
 
-test winpipe-1.1 {32 bit comprehensive tests: from little file} {pcOnly stdio cat32} {
+test winpipe-1.1 {32 bit comprehensive tests: from little file} {pcOnly exec cat32} {
     exec $cat32 < $path(little) > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } {little stderr32}
-test winpipe-1.2 {32 bit comprehensive tests: from big file} {pcOnly stdio cat32} {
+test winpipe-1.2 {32 bit comprehensive tests: from big file} {pcOnly exec cat32} {
     exec $cat32 < $path(big) > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } "{$big} stderr32"
-test winpipe-1.3 {32 bit comprehensive tests: a little from pipe} {nt stdio cat32} {
-    exec $::tcltest::tcltest more < little | $cat32 > $path(stdout) 2> $path(stderr)
+test winpipe-1.3 {32 bit comprehensive tests: a little from pipe} {nt exec cat32} {
+    exec [interpreter] more < little | $cat32 > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } {little stderr32}
-test winpipe-1.4 {32 bit comprehensive tests: a lot from pipe} {nt stdio cat32} {
-    exec $::tcltest::tcltest more < big | $cat32 > $path(stdout) 2> $path(stderr)
+test winpipe-1.4 {32 bit comprehensive tests: a lot from pipe} {nt exec cat32} {
+    exec [interpreter] more < big | $cat32 > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } "{$big} stderr32"
-test winpipe-1.5 {32 bit comprehensive tests: a lot from pipe} {95 stdio cat32} {
+test winpipe-1.5 {32 bit comprehensive tests: a lot from pipe} {95 exec cat32} {
     exec command /c type big |& $cat32 > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } "{$big} stderr32"
 test winpipe-1.6 {32 bit comprehensive tests: from console} \
-	{pcOnly stdio cat32 AllocConsole} {
+	{pcOnly cat32 AllocConsole} {
     # would block waiting for human input
 } {}
-test winpipe-1.7 {32 bit comprehensive tests: from NUL} {pcOnly stdio cat32} {
+test winpipe-1.7 {32 bit comprehensive tests: from NUL} {pcOnly exec cat32} {
     exec $cat32 < nul > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } {{} stderr32}
-test winpipe-1.8 {32 bit comprehensive tests: from socket} {pcOnly stdio cat32} {
+test winpipe-1.8 {32 bit comprehensive tests: from socket} {pcOnly cat32} {
     # doesn't work
 } {}
 test winpipe-1.9 {32 bit comprehensive tests: from nowhere} \
-	{pcOnly stdio cat32 .console} {
+	{pcOnly exec cat32 .console} {
     exec $cat32 > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } {{} stderr32}
 test winpipe-1.10 {32 bit comprehensive tests: from file handle} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     set f [open $path(little) r]
     exec $cat32 <@$f > $path(stdout) 2> $path(stderr)
     close $f
     list [contents $path(stdout)] [contents $path(stderr)]
 } {little stderr32}
 test winpipe-1.11 {32 bit comprehensive tests: read from application} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     set f [open "|[list $cat32] < $path(little)" r]
     gets $f line
     catch {close $f} msg
     list $line $msg
 } {little stderr32}
 test winpipe-1.12 {32 bit comprehensive tests: a little to file} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     exec $cat32 < $path(little) > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } {little stderr32}
 test winpipe-1.13 {32 bit comprehensive tests: a lot to file} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     exec $cat32 < $path(big) > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } "{$big} stderr32"
 test winpipe-1.14 {32 bit comprehensive tests: a little to pipe} \
-	{pcOnly stdio cat32} {
-    exec $cat32 < $path(little) | $::tcltest::tcltest $path(more) > $path(stdout) 2> $path(stderr)
+	{pcOnly exec stdio cat32} {
+    exec $cat32 < $path(little) | [interpreter] $path(more) > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } {little stderr32}
 test winpipe-1.15 {32 bit comprehensive tests: a lot to pipe} \
-	{pcOnly stdio cat32} {
-    exec $cat32 < $path(big) | $::tcltest::tcltest $path(more) > $path(stdout) 2> $path(stderr)
+	{pcOnly exec stdio cat32} {
+    exec $cat32 < $path(big) | [interpreter] $path(more) > $path(stdout) 2> $path(stderr)
     list [contents $path(stdout)] [contents $path(stderr)]
 } "{$big} stderr32"
-test winpipe-1.16 {32 bit comprehensive tests: to console} {pcOnly stdio cat32} {
+test winpipe-1.16 {32 bit comprehensive tests: to console} {pcOnly exec cat32} {
     catch {exec $cat32 << "You should see this\n" >@stdout} msg
     set msg
 } stderr32
-test winpipe-1.17 {32 bit comprehensive tests: to NUL} {pcOnly stdio cat32} {
+test winpipe-1.17 {32 bit comprehensive tests: to NUL} {pcOnly exec cat32} {
     # some apps hang when sending a large amount to NUL.  $cat32 isn't one.
     catch {exec $cat32 < $path(big) > nul} msg
     set msg
 } stderr32
 test winpipe-1.18 {32 bit comprehensive tests: to nowhere} \
-	{pcOnly stdio cat32 .console} {
+	{pcOnly exec cat32 .console} {
     exec $cat32 < $path(big) >&@stdout 
 } {}
-test winpipe-1.19 {32 bit comprehensive tests: to file handle} {pcOnly stdio cat32} {
+test winpipe-1.19 {32 bit comprehensive tests: to file handle} {pcOnly exec cat32} {
     set f1 [open $path(stdout) w]
     set f2 [open $path(stderr) w]
     exec $cat32 < $path(little) >@$f1 2>@$f2
@@ -156,14 +156,14 @@
     list [contents $path(stdout)] [contents $path(stderr)]
 } {little stderr32}
 test winpipe-1.20 {32 bit comprehensive tests: write to application} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     set f [open |[list $cat32 >$path(stdout)] w]
     puts -nonewline $f "foo"
     catch {close $f} msg
     list [contents $path(stdout)] $msg
 } {foo stderr32}
 test winpipe-1.21 {32 bit comprehensive tests: read/write application} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     set f [open "|[list $cat32]" r+]
     puts $f $big
     puts $f \032
@@ -172,13 +172,13 @@
     catch {close $f}
     set r
 } "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
-test winpipe-1.22 {Checking command.com for Win95/98 hanging} {95 stdio} {
+test winpipe-1.22 {Checking command.com for Win95/98 hanging} {95 exec} {
     exec command.com /c dir /b
     set result 1
 } 1
 file delete more
 
-test winpipe-4.1 {Tcl_WaitPid} {nt stdio cat32} {
+test winpipe-4.1 {Tcl_WaitPid} {nt exec cat32} {
     proc readResults {f} {
 	global x result
 	if { [eof $f] } {
@@ -208,10 +208,10 @@
 set env(TMP) c:/
 set env(TEMP) c:/
 
-test winpipe-5.1 {TclpCreateTempFile: cleanup temp files} {pcOnly stdio} {
+test winpipe-5.1 {TclpCreateTempFile: cleanup temp files} {pcOnly exec} {
     set x {}
     set existing [glob -nocomplain c:/tcl*.tmp]
-    exec $::tcltest::tcltest < nothing 
+    exec [interpreter] < nothing 
     foreach p [glob -nocomplain c:/tcl*.tmp] {
 	if {[lsearch $existing $p] == -1} {
 	    lappend x $p
@@ -219,38 +219,38 @@
     }
     set x
 } {}
-test winpipe-5.2 {TclpCreateTempFile: TMP and TEMP not defined} {pcOnly stdio} {
+test winpipe-5.2 {TclpCreateTempFile: TMP and TEMP not defined} {pcOnly exec} {
     set tmp $env(TMP)
     set temp $env(TEMP)
     unset env(TMP)
     unset env(TEMP)
-    exec $::tcltest::tcltest < nothing
+    exec [interpreter] < nothing
     set env(TMP) $tmp
     set env(TEMP) $temp
     set x {}
 } {}
 test winpipe-5.3 {TclpCreateTempFile: TMP specifies non-existent directory} \
-	{pcOnly stdio} {
+	{pcOnly exec } {
     set tmp $env(TMP)
     set env(TMP) snarky
-    exec $::tcltest::tcltest < nothing
+    exec [interpreter] < nothing
     set env(TMP) $tmp
     set x {}
 } {}
 test winpipe-5.4 {TclpCreateTempFile: TEMP specifies non-existent directory} \
-	{pcOnly stdio} {
+	{pcOnly exec} {
     set tmp $env(TMP)
     set temp $env(TEMP)
     unset env(TMP)
     set env(TEMP) snarky
-    exec $::tcltest::tcltest < nothing
+    exec [interpreter] < nothing
     set env(TMP) $tmp
     set env(TEMP) $temp
     set x {}
 } {}
 
 test winpipe-6.1 {PipeSetupProc & PipeCheckProc: read threads} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     set f [open "|[list $cat32]" r+]
     fconfigure $f -blocking 0
     fileevent $f writable { set x writable }
@@ -270,7 +270,7 @@
 } {writable timeout readable {foobar
 } timeout 1 stderr32}
 test winpipe-6.2 {PipeSetupProc & PipeCheckProc: write threads} \
-	{pcOnly stdio cat32} {
+	{pcOnly exec cat32} {
     set f [open "|[list $cat32]" r+]
     fconfigure $f -blocking 0
     fileevent $f writable { set x writable }
@@ -287,11 +287,11 @@
     puts "[list $argv0 $argv]"
 } echoArgs.tcl]
 
-test winpipe-7.1 {BuildCommandLine: null arguments} {pcOnly stdio} {
-    exec $::tcltest::tcltest $path(echoArgs.tcl) foo "" bar
+test winpipe-7.1 {BuildCommandLine: null arguments} {pcOnly exec} {
+    exec [interprter] $path(echoArgs.tcl) foo "" bar
 } [list $path(echoArgs.tcl) {foo {} bar}]
-test winpipe-7.2 {BuildCommandLine: null arguments} {pcOnly stdio} {
-    exec $::tcltest::tcltest $path(echoArgs.tcl) foo \" bar
+test winpipe-7.2 {BuildCommandLine: null arguments} {pcOnly exec} {
+    exec [interprter] $path(echoArgs.tcl) foo \" bar
 } [list $path(echoArgs.tcl) {foo {"} bar}]
 
 # restore old values for env(TMP) and env(TEMP)
