diff options
Diffstat (limited to 'lib/printf-args.c')
| -rw-r--r-- | lib/printf-args.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/lib/printf-args.c b/lib/printf-args.c index c2022503..b83ec1e8 100644 --- a/lib/printf-args.c +++ b/lib/printf-args.c @@ -1,5 +1,5 @@ /* Decomposed printf argument list. - Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2024 Free Software + Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2025 Free Software Foundation, Inc. This file is free software: you can redistribute it and/or modify @@ -32,6 +32,9 @@ /* Get INT_WIDTH. */ #include <limits.h> +/* Get abort(). */ +#include <stdlib.h> + #ifdef STATIC STATIC #endif @@ -296,9 +299,19 @@ PRINTF_FETCHARGS (va_list args, arguments *a) } break; #endif - default: - /* Unknown type. */ + case TYPE_NONE: + /* Argument i is not used by any directive, but some argument with + number > i is used by a format directive. POSIX says that this + is invalid: + "When numbered argument specifications are used, specifying the + Nth argument requires that all the leading arguments, from the + first to the (N-1)th, are specified in the format string." + The reason is that we cannot know how many bytes to skip in the + va_arg sequence. */ return -1; + default: + /* Unknown type. Should not happen. */ + abort (); } return 0; } |