Debian Bug report logs - #756602
printf(3) manpage: please document that %n can't include flags, width or precision

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Package: manpages-dev; Maintainer for manpages-dev is Dr. Tobias Quathamer <[email protected]>; Source for manpages-dev is src:manpages (PTS, buildd, popcon).

Reported by: Jakub Wilk <[email protected]>

Date: Thu, 31 Jul 2014 09:30:02 UTC

Severity: minor

Tags: fixed-upstream

Found in version manpages/3.65-1

Fixed in version manpages/3.71-1

Done: Simon Paillard <[email protected]>

Bug is archived. No further changes may be made.

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Subject: Bug#756602: printf(3) manpage: please document that %n can't include flags, width or precision
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tags 756602 fixed-upstream
thanks

Hello Jakub,

I've applied the patch below.

Cheers,

Michael

--- a/man3/printf.3
+++ b/man3/printf.3
@@ -332,9 +332,7 @@ For other conversions, the behavior is undefined.
 .B \-
 The converted value is to be left adjusted on the field boundary.
 (The default is right justification.)
-Except for
-.B n
-conversions, the converted value is padded on the right with blanks, rather
+The converted value is padded on the right with blanks, rather
 than on the left with blanks or zeros.
 A
 .B \-
@@ -788,10 +786,17 @@ or
 .TP
 .B n
 The number of characters written so far is stored into the integer
-indicated by the
-.I "int\ *"
-(or variant) pointer argument.
+pointed to by the corresponding argument.
+That argument shall be an
+.I "int\ *",
+or variant, as specified by the
+.B l
+or
+.B ll
+length modifier.
 No argument is converted.
+The behavior is undefined if the conversion specification includes
+any flags, a field width, or a precision.
 .TP
 .B m
 (Glibc extension.)

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