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/split.c | 139 +++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 release/src/router/busybox/coreutils/split.c

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

diff --git a/release/src/router/busybox/coreutils/split.c b/release/src/router/busybox/coreutils/split.c
new file mode 100644
index 00000000..f1ec64be
--- /dev/null
+++ b/release/src/router/busybox/coreutils/split.c
@@ -0,0 +1,139 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * split - split a file into pieces
+ * Copyright (c) 2007 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+/* BB_AUDIT: SUSv3 compliant
+ * SUSv3 requirements:
+ * http://www.opengroup.org/onlinepubs/009695399/utilities/split.html
+ */
+#include "libbb.h"
+
+static const struct suffix_mult split_suffices[] = {
+#if ENABLE_FEATURE_SPLIT_FANCY
+	{ "b", 512 },
+#endif
+	{ "k", 1024 },
+	{ "m", 1024*1024 },
+#if ENABLE_FEATURE_SPLIT_FANCY
+	{ "g", 1024*1024*1024 },
+#endif
+	{ }
+};
+
+/* Increment the suffix part of the filename.
+ * Returns NULL if we are out of filenames.
+ */
+static char *next_file(char *old, unsigned suffix_len)
+{
+	size_t end = strlen(old);
+	unsigned i = 1;
+	char *curr;
+
+	do {
+		curr = old + end - i;
+		if (*curr < 'z') {
+			*curr += 1;
+			break;
+		}
+		i++;
+		if (i > suffix_len) {
+			return NULL;
+		}
+		*curr = 'a';
+	} while (1);
+
+	return old;
+}
+
+#define read_buffer bb_common_bufsiz1
+enum { READ_BUFFER_SIZE = COMMON_BUFSIZE - 1 };
+
+#define SPLIT_OPT_l (1<<0)
+#define SPLIT_OPT_b (1<<1)
+#define SPLIT_OPT_a (1<<2)
+
+int split_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int split_main(int argc UNUSED_PARAM, char **argv)
+{
+	unsigned suffix_len = 2;
+	char *pfx;
+	char *count_p;
+	const char *sfx;
+	off_t cnt = 1000;
+	off_t remaining = 0;
+	unsigned opt;
+	ssize_t bytes_read, to_write;
+	char *src;
+
+	opt_complementary = "?2:a+"; /* max 2 args; -a N */
+	opt = getopt32(argv, "l:b:a:", &count_p, &count_p, &suffix_len);
+
+	if (opt & SPLIT_OPT_l)
+		cnt = XATOOFF(count_p);
+	if (opt & SPLIT_OPT_b) // FIXME: also needs XATOOFF
+		cnt = xatoull_sfx(count_p, split_suffices);
+	sfx = "x";
+
+	argv += optind;
+	if (argv[0]) {
+		if (argv[1])
+			sfx = argv[1];
+		xmove_fd(xopen(argv[0], O_RDONLY), 0);
+	} else {
+		argv[0] = (char *) bb_msg_standard_input;
+	}
+
+	if (NAME_MAX < strlen(sfx) + suffix_len)
+		bb_error_msg_and_die("suffix too long");
+
+	{
+		char *char_p = xzalloc(suffix_len + 1);
+		memset(char_p, 'a', suffix_len);
+		pfx = xasprintf("%s%s", sfx, char_p);
+		if (ENABLE_FEATURE_CLEAN_UP)
+			free(char_p);
+	}
+
+	while (1) {
+		bytes_read = safe_read(STDIN_FILENO, read_buffer, READ_BUFFER_SIZE);
+		if (!bytes_read)
+			break;
+		if (bytes_read < 0)
+			bb_simple_perror_msg_and_die(argv[0]);
+		src = read_buffer;
+		do {
+			if (!remaining) {
+				if (!pfx)
+					bb_error_msg_and_die("suffixes exhausted");
+				xmove_fd(xopen(pfx, O_WRONLY | O_CREAT | O_TRUNC), 1);
+				pfx = next_file(pfx, suffix_len);
+				remaining = cnt;
+			}
+
+			if (opt & SPLIT_OPT_b) {
+				/* split by bytes */
+				to_write = (bytes_read < remaining) ? bytes_read : remaining;
+				remaining -= to_write;
+			} else {
+				/* split by lines */
+				/* can be sped up by using _memrchr_
+				 * and writing many lines at once... */
+				char *end = memchr(src, '\n', bytes_read);
+				if (end) {
+					--remaining;
+					to_write = end - src + 1;
+				} else {
+					to_write = bytes_read;
+				}
+			}
+
+			xwrite(STDOUT_FILENO, src, to_write);
+			bytes_read -= to_write;
+			src += to_write;
+		} while (bytes_read);
+	}
+	return EXIT_SUCCESS;
+}
-- 
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