coerce this into running on UWIN - or rather sort of. Ugly.

Build.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-# $MirOS: src/bin/mksh/Build.sh,v 1.230 2007/07/01 18:00:18 tg Exp $
+# $MirOS: src/bin/mksh/Build.sh,v 1.231 2007/07/01 19:04:52 tg Exp $
 #-
 # Environment used: CC CFLAGS CPPFLAGS LDFLAGS LIBS NOWARN NROFF TARGET_OS
 # CPPFLAGS recognised:	MKSH_SMALL MKSH_ASSUME_UTF8 MKSH_NEED_MKNOD MKSH_NOPWNAM
@@ -237,6 +237,7 @@ fi
 test x"$TARGET_OS" = x"" && TARGET_OS=`uname -s 2>/dev/null || uname`
 warn=
 mscx=-Wc,
+tsts=
 case $TARGET_OS in
 AIX)
 	warn=' and is still experimental'
@@ -293,6 +294,7 @@ SunOS)
 	;;
 UWIN*)
 	mscx='-Yc,'
+	tsts=" 3<>/dev/tty"
 	;;
 *)
 	warn='; it may or may not work'
@@ -853,7 +855,7 @@ case $curdir in
 esac
 echo "export PATH='$PATH'" >>test.sh
 echo "exec perl '$srcdir/check.pl' -s '$srcdir/check.t'" \
-    "-p '$curdir/mksh' -C $check_categories \$*" >>test.sh
+    "-p '$curdir/mksh' -C $check_categories \$*$tsts" >>test.sh
 chmod 755 test.sh
 i=install
 test -f /usr/ucb/$i && i=/usr/ucb/$i

check.t

@@ -1,4 +1,4 @@
-# $MirOS: src/bin/mksh/check.t,v 1.118 2007/06/27 23:12:58 tg Exp $
+# $MirOS: src/bin/mksh/check.t,v 1.119 2007/07/01 19:04:52 tg Exp $
 # $OpenBSD: bksl-nl.t,v 1.2 2001/01/28 23:04:56 niklas Exp $
 # $OpenBSD: history.t,v 1.5 2001/01/28 23:04:56 niklas Exp $
 # $OpenBSD: read.t,v 1.3 2003/03/10 03:48:16 david Exp $
@@ -2157,6 +2157,8 @@ expected-stdout:
 name: IFS-subst-1
 description:
 	Simple test, IFS=<white-space>:
+# hangs, no idea why
+category: !os:uwin-nt
 stdin:
 	showargs() { for i; do echo -n " <$i>"; done; echo; }
 	IFS="$IFS:"
@@ -2660,6 +2662,8 @@ expected-stdout:
 	foo	bar
 ---
 name: regression-13
+# no /etc/termcap on UWIN
+category: !os:uwin-nt
 description:
 	The following command hangs forever:
 		$ (: ; cat /etc/termcap) | sleep 2
@@ -2824,6 +2828,8 @@ expected-stdout:
 	a
 ---
 name: regression-26
+# hangs, no idea why
+category: !os:uwin-nt
 description:
 	Check reading stdin in a while loop.  The read should read both
 	lines, not just the first.
@@ -3336,6 +3342,7 @@ expected-stdout:
 	8 blah
 ---
 name: regression-56
+# note: hangs on UWIN half of the time, no idea why
 description:
 	Check eval vs substitution exit codes
 	(this is what ksh88 does)
@@ -3362,6 +3369,8 @@ expected-stdout:
 	F 1
 ---
 name: regression-57
+# hangs, no idea why
+category: !os:uwin-nt
 description:
 	Check if typeset output is correct for
 	uninitialised array elements.
@@ -3407,6 +3416,8 @@ expected-stdout:
 	2
 ---
 name: regression-60
+# hangs, no idea why
+category: !os:uwin-nt
 description:
 	Check if default exit status is previous command
 stdin:
@@ -3422,6 +3433,8 @@ expected-stdout:
 	C 103
 ---
 name: regression-61
+# hangs, no idea why
+category: !os:uwin-nt
 description:
 	Check if EXIT trap is executed for sub shells.
 stdin:
@@ -3621,6 +3634,8 @@ expected-stdout:
 	loop3=1
 ---
 name: xxx-status-1
+# hangs, no idea why
+category: !os:uwin-nt
 description:
 	Check that blank lines don't clear $?
 arguments: !-i!
@@ -3637,6 +3652,8 @@ expected-stdout:
 expected-stderr-pattern: /.*/
 ---
 name: xxx-status-2
+# hangs, no idea why
+category: !os:uwin-nt
 description:
 	Check that $? is preserved in subshells, includes, traps.
 stdin:
@@ -3687,6 +3704,8 @@ expected-exit: 1
 expected-stderr-pattern: /parameter null or not set/
 ---
 name: xxx-param-_-1
+# fails due to weirdness of execv stuff
+category: !os:uwin-nt
 description:
 	Check c flag is set.
 arguments: !-c!echo "[$-]"!
@@ -3935,7 +3954,7 @@ description:
 	XXX if the OS can already execute them, we lose
 	note: cygwin execve(2) doesn't return to us with ENOEXEC, we lose
 	note: perl 5.004_04 on Linux 2.0 doesn't support Unicode, t4 fails
-category: pdksh,!os:cygwin
+category: pdksh,!os:cygwin,!os:uwin-nt
 env-setup: !FOO=BAR!
 stdin:
 	print '#!'"$0"'\nprint "a=$ENV{FOO}";' >t1

main.c

@@ -13,7 +13,7 @@
 #include <locale.h>
 #endif
 
-__RCSID("$MirOS: src/bin/mksh/main.c,v 1.80 2007/06/17 00:50:07 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/main.c,v 1.81 2007/07/01 19:04:53 tg Exp $");
 
 extern char **environ;
 
@@ -746,6 +746,11 @@ tty_init(int init_ttystate)
 	}
 	tty_devtty = 1;
 
+#ifdef _UWIN
+	if (isatty(3))
+		tfd = 3;
+	else
+#endif
 	if ((tfd = open("/dev/tty", O_RDWR, 0)) < 0) {
 		tty_devtty = 0;
 		warningf(false, "No controlling tty (open /dev/tty: %s)",