append characters without overflowing text.

diff --git a/libtrbnet/trbflash.c b/libtrbnet/trbflash.c
index 6809439b55e79ea13ab16c311dbe02af50a53d8d..b937cb3931c4a2b9d9682fe2d86529293fe3d24d 100644 (file)
--- a/libtrbnet/trbflash.c
+++ b/libtrbnet/trbflash.c
@@ -1809,7 +1809,7 @@ int main(int argc, char** argv)
         fprintf(stdout, "%02x ", pageBuffer[i][c]);
         cc[0] = isprint((char)pageBuffer[i][c]) == 0
           ? '.' : (char)pageBuffer[i][c];
-        strncat(text, cc, 32);
+        strncat(text, cc, sizeof(text) - strlen(text));
         if ((c % 16) == 15) {
           fprintf(stdout, "  %s\n", text);
         }