Use strncpy and strncat more safely

1 files changed, 2 insertions, 1 deletions

diff --git a/getabook.c b/getabook.c
index 81c1dfc..2712cc8 100644
--- a/getabook.c
+++ b/getabook.c
@@ -158,7 +158,8 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 
-	strncpy(bookid, argv[argc-1], STRMAX);
+	strncpy(bookid, argv[argc-1], STRMAX-1);
+	bookid[STRMAX-1] = '\0';
 	bookdir = argv[argc-1];
 
 	pages = malloc(sizeof(*pages) * MAXPAGES);