• Add support for Ultrix 4.5 and ucode cc (?)

‣ I/O redirection seems broken:
    $ (date; date >/dev/null; date) | wc -l
    1 (expected: 2)
  ‣ other than that: working fine
  ‣ -YBSD (default) and -YSYSTEM_FIVE don’t work, just -YPOSIX, somehow
• Fix $(…) to `…` for OSF/1 V2.0 /bin/sh
  ‣ this compiler is FUBAR though:
	$ cat >t.c
	main() { return (foo()); }
	$ cc t.c
	ld:
	Unresolved :
	foo
	$ echo $?
	0
	$ ls -l a.out
	-rwxr-xr-x   1 mirbsd   users      10835 Jul 21 17:12 a.out
  ‣ it seems to have ucode, but man is not installed
• new mirtoconf check: mkstemp(3)
• if !HAVE_MKSTEMP (Ultrix), use tempnam(3)
• only use printf(1) if it exists (it doesn’t on Ultrix)
• a few more signals
• add S_ISLNK if the OS doesn’t define it
• add strcasecmp(3) proto for Ultrix (it _is_ in <portability.h>, but
  only for -YBSD I think)
• fgrep(1) on Ultrix doesn’t do “-e ① -e ②”

10x DEChengst:#UnixNL for giving access

sh.h

@@ -8,8 +8,8 @@
 /*	$OpenBSD: c_test.h,v 1.4 2004/12/20 11:34:26 otto Exp $	*/
 /*	$OpenBSD: tty.h,v 1.5 2004/12/20 11:34:26 otto Exp $	*/
 
-#define MKSH_SH_H_ID "$MirOS: src/bin/mksh/sh.h,v 1.197 2008/03/23 22:09:59 tg Exp $"
-#define MKSH_VERSION "R33 2008/03/23"
+#define MKSH_SH_H_ID "$MirOS: src/bin/mksh/sh.h,v 1.198 2008/03/25 21:34:45 tg Exp $"
+#define MKSH_VERSION "R33 2008/03/25"
 
 #if HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -167,6 +167,9 @@ typedef int bool;
 #ifndef S_ISTXT
 #define S_ISTXT		0001000
 #endif
+#ifndef S_ISLNK
+#define S_ISLNK(m)	((m & 0170000) == 0120000)
+#endif
 #ifndef S_ISSOCK
 #define S_ISSOCK(m)	((m & 0170000) == 0140000)
 #endif
@@ -221,6 +224,10 @@ mode_t getmode(const void *, mode_t);
 void *setmode(const char *);
 #endif
 
+#ifdef __ultrix
+int strcasecmp(const char *, const char *);
+#endif
+
 #if !HAVE_STRCASESTR
 const char *stristr(const char *, const char *);
 #endif