From 1197ccadc0ba24b8f5dc9debc59ca25593067f64 Mon Sep 17 00:00:00 2001
From: apnadkarni <apnmbx-wits@yahoo.com>
Date: Mon, 5 Sep 2022 11:37:54 +0000
Subject: Ticket [55a02f20ec] - fallback to USERPROFILE when setting HOME env
 on Windows

---
 tests/env.test   | 40 +++++++++++++++++++++++++++++++++++++++-
 win/tclWinInit.c |  9 ++++++++-
 2 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/tests/env.test b/tests/env.test
index 905cdab..ea58b26 100644
--- a/tests/env.test
+++ b/tests/env.test
@@ -105,6 +105,7 @@ variable keep {
     CommonProgramFiles CommonProgramFiles(x86) ProgramFiles
     ProgramFiles(x86) CommonProgramW6432 ProgramW6432
     WINECONFIGDIR WINEDATADIR WINEDLLDIR0 WINEHOMEDIR PROCESSOR_ARCHITECTURE
+    USERPROFILE
 }
 
 variable printenvScript [makeFile [string map [list @keep@ [list $keep]] {
@@ -409,7 +410,7 @@ test env-7.3 {
       return [info exists ::env(test7_3)]
     }}
 } -cleanup cleanup1 -result 1
-
+
 test env-8.0 {
     memory usage - valgrind does not report reachable memory
 } -body {
@@ -419,6 +420,43 @@ test env-8.0 {
 } -result {i'm with dummy}
 
 
+test env-9.0 {
+    Initialization of HOME from HOMEDRIVE and HOMEPATH
+} -constraints win -setup {
+    setup1
+    unset -nocomplain ::env(HOME)
+    set ::env(HOMEDRIVE) X:
+    set ::env(HOMEPATH) \\home\\path
+} -cleanup {
+    cleanup1
+} -body {
+    set pipe [open |[list [interpreter]] r+]
+    puts $pipe {puts $::env(HOME); flush stdout; exit}
+    flush $pipe
+    set result [gets $pipe]
+    close $pipe
+    set result
+} -result {X:\home\path}
+
+test env-9.1 {
+    Initialization of HOME from USERPROFILE
+} -constraints win -setup {
+    setup1
+    unset -nocomplain ::env(HOME)
+    unset -nocomplain ::env(HOMEDRIVE)
+    unset -nocomplain ::env(HOMEPATH)
+} -cleanup {
+    cleanup1
+} -body {
+    set pipe [open |[list [interpreter]] r+]
+    puts $pipe {puts $::env(HOME); flush stdout; exit}
+    flush $pipe
+    set result [gets $pipe]
+    close $pipe
+    set result
+} -result $::env(USERPROFILE)
+
+
 
 # cleanup
 rename getenv {}
diff --git a/win/tclWinInit.c b/win/tclWinInit.c
index 4f59c1a..eae4404 100644
--- a/win/tclWinInit.c
+++ b/win/tclWinInit.c
@@ -593,7 +593,14 @@ TclpSetVariables(
 	    Tcl_SetVar2(interp, "env", "HOME", Tcl_DStringValue(&ds),
 		    TCL_GLOBAL_ONLY);
 	} else {
-	    Tcl_SetVar2(interp, "env", "HOME", "c:\\", TCL_GLOBAL_ONLY);
+            /* None of HOME, HOMEDRIVE, HOMEPATH exists. Try USERPROFILE */
+            ptr = Tcl_GetVar2(interp, "env", "USERPROFILE", TCL_GLOBAL_ONLY);
+            if (ptr != NULL && ptr[0]) {
+                Tcl_SetVar2(interp, "env", "HOME", ptr, TCL_GLOBAL_ONLY);
+            } else {
+                /* Last resort */
+                Tcl_SetVar2(interp, "env", "HOME", "c:\\", TCL_GLOBAL_ONLY);
+            }
 	}
     }
 
-- 
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