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From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 16 Dec 2016 19:49:22 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r310171 - head/sys/sys
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Author: dim
Date: Fri Dec 16 19:49:22 2016
New Revision: 310171
URL: https://svnweb.freebsd.org/changeset/base/310171

Log:
  Add __scanflike attributes to the kernel's sscanf() and vsscanf()
  declarations.  This should help to catch future mismatches between
  format strings and arguments.
  
  MFC after:	1 week

Modified:
  head/sys/sys/systm.h

Modified: head/sys/sys/systm.h
==============================================================================
--- head/sys/sys/systm.h	Fri Dec 16 19:09:57 2016	(r310170)
+++ head/sys/sys/systm.h	Fri Dec 16 19:49:22 2016	(r310171)
@@ -227,8 +227,8 @@ int	vsnprintf(char *, size_t, const char
 int	vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
 int	vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
 int	ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
-int	sscanf(const char *, char const *, ...) __nonnull(1) __nonnull(2);
-int	vsscanf(const char *, char const *, __va_list) __nonnull(1) __nonnull(2);
+int	sscanf(const char *, char const *, ...) __nonnull(1) __nonnull(2) __scanflike(2, 3);
+int	vsscanf(const char *, char const *, __va_list) __nonnull(1) __nonnull(2) __scanflike(2, 0);
 long	strtol(const char *, char **, int) __nonnull(1);
 u_long	strtoul(const char *, char **, int) __nonnull(1);
 quad_t	strtoq(const char *, char **, int) __nonnull(1);