TRANS(GetHostname): Fix "‘strncpy’ output truncated.." warning

Occurs when compiling xserver master with gcc 13.2.1.

In file included from /local/stuff/xorg/include/X11/Xtrans/transport.c:69:
In function ‘_XSERVTransGetHostname’,
    inlined from ‘_XSERVTransConvertAddress’ at /local/stuff/xorg/include/X11/Xtrans/Xtransutil.c:188:12:
/local/stuff/xorg/include/X11/Xtrans/Xtrans.c:1352:5: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
 1352 |     strncpy (buf, name.nodename, len);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/local/stuff/xorg/include/X11/Xtrans/Xtrans.c:1350:11: note: length computed here
 1350 |     len = strlen (name.nodename);
      |           ^~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Kim Woelders <kim@woelders.dk>
Part-of: <https://gitlab.freedesktop.org/xorg/lib/libxtrans/-/merge_requests/16>

1 files changed, 1 insertions, 1 deletions

diff --git a/Xtrans.c b/Xtrans.c
index 3f50f6a..d826996 100644
--- a/Xtrans.c
+++ b/Xtrans.c
@@ -1349,7 +1349,7 @@ int TRANS(GetHostname) (char *buf, int maxlen)
     uname (&name);
     len = strlen (name.nodename);
     if (len >= maxlen) len = maxlen - 1;
-    strncpy (buf, name.nodename, len);
+    memcpy (buf, name.nodename, len);
     buf[len] = '\0';
 #else
     buf[0] = '\0';