diff options
| author |   deraadt <deraadt@openbsd.org> | 1999-03-01 20:41:56 +0000 |
|---|---|---|
| committer | deraadt <deraadt@openbsd.org> | 1999-03-01 20:41:56 +0000 |
| commit | 63fa394a2bc3bf3d7b99e621a6537f282df5be26 (patch) | |
| tree | e29eb345ab80f69e773837147e448d0d37389d8a /lib/libc/stdio/printf.3 | |
| parent | Note that NO_SHARED_LIBS can not be tested until after (diff) | |
| download | wireguard-openbsd-63fa394a2bc3bf3d7b99e621a6537f282df5be26.tar.xz wireguard-openbsd-63fa394a2bc3bf3d7b99e621a6537f282df5be26.zip | |
talk about positional arguments and sizes; james@oaktree.co.uk
Diffstat (limited to 'lib/libc/stdio/printf.3')
| -rw-r--r-- | lib/libc/stdio/printf.3 | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/libc/stdio/printf.3 b/lib/libc/stdio/printf.3 index dd3a4f24054..f2b8b9ff547 100644 --- a/lib/libc/stdio/printf.3 +++ b/lib/libc/stdio/printf.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: printf.3,v 1.14 1999/02/27 21:55:46 deraadt Exp $ +.\" $OpenBSD: printf.3,v 1.15 1999/03/01 20:41:56 deraadt Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -190,8 +190,6 @@ If this field is not provided, the argument following the last argument accessed will be used. Arguments are numbered starting at .Cm 1 . -If unaccessed arguments in the format string are interspersed with -ones that are accessed the results will be indeterminate. .It Zero or more of the following flags: .Bl -hyphen @@ -681,3 +679,9 @@ interface is not available on older systems and the .Fn asprintf interface is not portable. +.Pp +There is no way for printf to know the size of each argument passed. If +you use positional arguments you must ensure that all parameters, up to the +last positionally-specified parameter, are used in the format string. This +allows for the format string to be parsed for this information. Failure +to do this will mean your code is non-portable and liable to fail. |