small ash testsuite, adapted from bash
(only a small part of it, actually)
diff --git a/shell/ash_test/recho.c b/shell/ash_test/recho.c
new file mode 100644
index 0000000..02be0d7
--- /dev/null
+++ b/shell/ash_test/recho.c
@@ -0,0 +1,63 @@
+/*
+ recho -- really echo args, bracketed with <> and with invisible chars
+ made visible.
+
+ Chet Ramey
+ chet@po.cwru.edu
+*/
+
+/* Copyright (C) 2002-2005 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2, or (at your option) any later
+ version.
+
+ Bash is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with Bash; see the file COPYING. If not, write to the Free Software
+ Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+void strprint();
+
+int
+main(argc, argv)
+int argc;
+char **argv;
+{
+ register int i;
+
+ for (i = 1; i < argc; i++) {
+ printf("argv[%d] = <", i);
+ strprint(argv[i]);
+ printf(">\n");
+ }
+ exit(0);
+}
+
+void
+strprint(str)
+char *str;
+{
+ register unsigned char *s;
+
+ for (s = (unsigned char *)str; s && *s; s++) {
+ if (*s < ' ') {
+ putchar('^');
+ putchar(*s+64);
+ } else if (*s == 127) {
+ putchar('^');
+ putchar('?');
+ } else
+ putchar(*s);
+ }
+}