Add cat -v.
diff --git a/toys/catv.c b/toys/catv.c
new file mode 100644
index 0000000..3a36de6
--- /dev/null
+++ b/toys/catv.c
@@ -0,0 +1,60 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * cat -v implementation for toybox
+ *
+ * Copyright (C) 2006 Rob Landley <rob@landley.net>
+ */
+
+/* See "Cat -v considered harmful" at
+ * http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz */
+
+#include "toys.h"
+
+int catv_main(void)
+{
+ int retval = 0, fd;
+ char **argv = toys.optargs;
+
+ toys.optflags^=4;
+
+ // Loop through files.
+
+ do {
+ // Read from stdin if there's nothing else to do.
+
+ fd = 0;
+ if (*argv && 0>(fd = xopen(*argv, O_RDONLY, 0))) retval = EXIT_FAILURE;
+ else for(;;) {
+ int i, res;
+
+ res = reread(fd, toybuf, sizeof(toybuf));
+ if (res < 0) retval = EXIT_FAILURE;
+ if (res < 1) break;
+ for (i=0; i<res; i++) {
+ char c=toybuf[i];
+
+ if (c > 126 && (toys.optflags & 4)) {
+ if (c == 127) {
+ printf("^?");
+ continue;
+ } else {
+ printf("M-");
+ c -= 128;
+ }
+ }
+ if (c < 32) {
+ if (c == 10) {
+ if (toys.optflags & 1) putchar('$');
+ } else if (toys.optflags & (c==9 ? 2 : 4)) {
+ printf("^%c", c+'@');
+ continue;
+ }
+ }
+ putchar(c);
+ }
+ }
+ if (CFG_TOYS_FREE && fd) close(fd);
+ } while (*++argv);
+
+ return retval;
+}