From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 3 Jan 2015 13:58:15 +0100
Subject: patch to Vanilla Tomato 1.28

---
 release/src/router/busybox/coreutils/catv.c | 75 +++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 release/src/router/busybox/coreutils/catv.c

(limited to 'release/src/router/busybox/coreutils/catv.c')

diff --git a/release/src/router/busybox/coreutils/catv.c b/release/src/router/busybox/coreutils/catv.c
new file mode 100644
index 00000000..ff3139c8
--- /dev/null
+++ b/release/src/router/busybox/coreutils/catv.c
@@ -0,0 +1,75 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * cat -v implementation for busybox
+ *
+ * Copyright (C) 2006 Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* See "Cat -v considered harmful" at
+ * http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz */
+
+#include "libbb.h"
+
+int catv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int catv_main(int argc UNUSED_PARAM, char **argv)
+{
+	int retval = EXIT_SUCCESS;
+	int fd;
+	unsigned flags;
+
+	flags = getopt32(argv, "etv");
+#define CATV_OPT_e (1<<0)
+#define CATV_OPT_t (1<<1)
+#define CATV_OPT_v (1<<2)
+	flags ^= CATV_OPT_v;
+	argv += optind;
+
+	/* Read from stdin if there's nothing else to do. */
+	if (!argv[0])
+		*--argv = (char*)"-";
+	do {
+		fd = open_or_warn_stdin(*argv);
+		if (fd < 0) {
+			retval = EXIT_FAILURE;
+			continue;
+		}
+		for (;;) {
+			int i, res;
+
+#define read_buf bb_common_bufsiz1
+			res = read(fd, read_buf, COMMON_BUFSIZE);
+			if (res < 0)
+				retval = EXIT_FAILURE;
+			if (res < 1)
+				break;
+			for (i = 0; i < res; i++) {
+				unsigned char c = read_buf[i];
+
+				if (c > 126 && (flags & CATV_OPT_v)) {
+					if (c == 127) {
+						printf("^?");
+						continue;
+					}
+					printf("M-");
+					c -= 128;
+				}
+				if (c < 32) {
+					if (c == 10) {
+						if (flags & CATV_OPT_e)
+							bb_putchar('$');
+					} else if (flags & (c==9 ? CATV_OPT_t : CATV_OPT_v)) {
+						printf("^%c", c+'@');
+						continue;
+					}
+				}
+				bb_putchar(c);
+			}
+		}
+		if (ENABLE_FEATURE_CLEAN_UP && fd)
+			close(fd);
+	} while (*++argv);
+
+	fflush_stdout_and_exit(retval);
+}
-- 
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