summaryrefslogtreecommitdiffstats
path: root/README
diff options
context:
space:
mode:
Diffstat (limited to 'README')
-rw-r--r--README4
1 files changed, 4 insertions, 0 deletions
diff --git a/README b/README
index fb812cb..1d5c7da 100644
--- a/README
+++ b/README
@@ -16,6 +16,10 @@ The supported formats are bzip2, gzip, lzip and xz.
Zcat, zcmp, zdiff, and zgrep are improved replacements for the shell
scripts provided with GNU gzip. Ztest is unique to zutils.
+NOTE: Bzip2 and lzip provide well-defined values of exit status, which
+makes them safe to use with zutils. Gzip and xz may return ambiguous
+warning values, making them less reliable backends for zutils.
+
Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.