From 4d8d70d30171d6f451339f574130eed4fe747b4b Mon Sep 17 00:00:00 2001 From: Alyssa Ross Date: Mon, 29 Mar 2021 11:45:04 +0000 Subject: [PATCH] manual: clarify that scanf %n supports type modifiers My initial reading of the %n documentation was that it didn't support type conversions, because it only mentioned int*. Corresponding man-pages patch: https://lore.kernel.org/linux-man/20210328215509.31666-1-hi@alyssa.is/ Reviewed-by: Arjun Shankar --- manual/stdio.texi | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/manual/stdio.texi b/manual/stdio.texi index c48e3e6..6ff1806 100644 --- a/manual/stdio.texi +++ b/manual/stdio.texi @@ -3620,10 +3620,10 @@ function (@pxref{Parsing of Integers}) with the appropriate value The @samp{%X} conversion is identical to the @samp{%x} conversion. They both permit either uppercase or lowercase letters to be used as digits. -The default type of the corresponding argument for the @code{%d} and -@code{%i} conversions is @code{int *}, and @code{unsigned int *} for the -other integer conversions. You can use the following type modifiers to -specify other sizes of integer: +The default type of the corresponding argument for the @code{%d}, +@code{%i}, and @code{%n} conversions is @code{int *}, and +@code{unsigned int *} for the other integer conversions. You can use +the following type modifiers to specify other sizes of integer: @table @samp @item hh @@ -3888,7 +3888,8 @@ The resulting pointer value is not guaranteed to be valid if it was not originally written during the same program execution that reads it in. The @samp{%n} conversion produces the number of characters read so far -by this call. The corresponding argument should be of type @code{int *}. +by this call. The corresponding argument should be of type @code{int *}, +unless a type modifier is in effect (@pxref{Numeric Input Conversions}). This conversion works in the same way as the @samp{%n} conversion for @code{printf}; see @ref{Other Output Conversions}, for an example. -- 2.7.4