do not allow negative -l limit.

1 files changed, 3 insertions, 1 deletions

diff --git a/uxd.1 b/uxd.1
index d6868f3..d4c1cc9 100644
--- a/uxd.1
+++ b/uxd.1
@@ -109,7 +109,9 @@ bad sequences.
 .BI \-l \ length
 Stop dumping after \fIlength\fP bytes (not characters). If the limit is
 reached in the middle of a multibyte character, the entire character
-will be dumped.
+will be dumped. Can be given in decimal, hex (with \fI0x\fP prefix), or
+octal (with \fI0\fP prefix). Negative \fIlength\fP doesn\(aqt make sense, and
+is an error.
 .UNINDENT
 .\" stop dumping after <length> bytes (not characters).
 .