From 091909b5525fdf6833ff8e0b0d1f48ee73d0ec0c Mon Sep 17 00:00:00 2001
From: ckolivas <kernel@kolivas.org>
Date: Tue, 15 Mar 2011 10:40:14 +1100
Subject: [PATCH] Refuse to compress a file smaller than a minimum size.

---
 rzip.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/rzip.c b/rzip.c
index ae17097..98a55e6 100644
--- a/rzip.c
+++ b/rzip.c
@@ -689,6 +689,8 @@ static void mmap_stdin(rzip_control *control, uchar *buf, struct rzip_state *st)
 		total += ret;
 		if (ret == 0) {
 			/* Should be EOF */
+			if (total < 128)
+				failure("Will not compress a tiny file\n");
 			print_maxverbose("Shrinking chunk to %lld\n", total);
 			buf = (uchar *)mremap(buf, st->chunk_size, total, 0);
 			if (unlikely(buf == MAP_FAILED))
@@ -785,6 +787,8 @@ void rzip_fd(rzip_control *control, int fd_in, int fd_out)
 
 	if (!STDIN) {
 		len = control->st_size = s.st_size;
+		if (len < 128)
+			failure("Will not compress a tiny file\n");
 		print_verbose("File size: %lld\n", len);
 	} else
 		control->st_size = 0;