[PATCH] man/man3/strncpy.3: Document lack of terminating null byte

[Chan Lee <chanlee031012@gmail.com>]

The lack of a terminating null byte is already shown by the examples in
CAVEATS, but DESCRIPTION does not explain the condition under which it
happens.  A reader who only reads DESCRIPTION may miss this behavior.

This patch makes this behavior easier to discover by stating explicitly
that no terminating null byte is written when the source has dsize or
more non-null bytes.

Signed-off-by: Chan Lee <chanlee031012@gmail.com>
---
 man/man3/strncpy.3 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/man/man3/strncpy.3 b/man/man3/strncpy.3
index 9c476acb4..89da260fe 100644
--- a/man/man3/strncpy.3
+++ b/man/man3/strncpy.3
@@ -26,6 +26,10 @@ into the array pointed to by
 .IR dst .
 If the source has too few non-null bytes to fill the destination,
 it pads the destination with trailing null bytes.
+If the source has
+.I dsize
+or more non-null bytes,
+no terminating null byte is written to the destination.
 If the destination buffer,
 limited by its size,
 isn't large enough to hold the copy,
-- 
2.50.1 (Apple Git-155)