diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2021-09-02 09:50:39 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2021-09-02 09:50:39 +0000 |
| commit | 5117d1a54dd23a9d5c03888dc09b213ffd0f09e5 (patch) | |
| tree | 6216ac56936e71503237be45a4f15047f51f8bfa /lib | |
| parent | a613300c4e7334d31fd21b419c32d01092bae413 (diff) | |
Document new %n syslog+abort behaviour, text mostly copied from printf.3
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libc/stdio/wprintf.3 | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/lib/libc/stdio/wprintf.3 b/lib/libc/stdio/wprintf.3 index bac123c2ef6..96c99f6aa23 100644 --- a/lib/libc/stdio/wprintf.3 +++ b/lib/libc/stdio/wprintf.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: wprintf.3,v 1.8 2019/08/30 20:27:25 jmc Exp $ +.\" $OpenBSD: wprintf.3,v 1.9 2021/09/02 09:50:38 deraadt Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -33,7 +33,7 @@ .\" .\" @(#)printf.3 8.1 (Berkeley) 6/4/93 .\" -.Dd $Mdocdate: August 30 2019 $ +.Dd $Mdocdate: September 2 2021 $ .Dt WPRINTF 3 .Os .Sh NAME @@ -563,11 +563,13 @@ pointer argument is printed in hexadecimal (as if by or .Ql %#lx ) . .It Cm n -The number of characters written so far is stored into the -integer indicated by the -.Vt "int *" -(or variant) pointer argument. -No argument is converted. +This conversion specifier has serious security implications, so it was changed to +no longer store the number of bytes written so far into the variable indicated +by the pointer argument. +Instead a +.Xr syslog 3 +message will be generated, after which the program is aborted with +.Dv SIGABRT . .It Cm % A .Ql % |