MFC r331936, r331942, r331943, r331945, r331947, r331948

Add new gets_s(3) stdio function.

This implements the gets_s(3) function as documented at
http://en.cppreference.com/w/c/io/gets. It facilitates the
optional removal of gets(3).

Reviewed by:	ed
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D12785

1 files changed, 8 insertions, 0 deletions

diff --git a/include/stdio.h b/include/stdio.h
index 1ff9aca..13329c4 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -49,6 +49,11 @@ typedef	__size_t	size_t;
 #define	_SIZE_T_DECLARED
 #endif
 
+#ifndef _RSIZE_T_DEFINED
+#define _RSIZE_T_DEFINED
+typedef size_t rsize_t;
+#endif
+
 #if __POSIX_VISIBLE >= 200809
 #ifndef _OFF_T_DECLARED
 #define	_OFF_T_DECLARED
@@ -263,6 +268,9 @@ size_t	 fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
 int	 getc(FILE *);
 int	 getchar(void);
 char	*gets(char *);
+#if __EXT1_VISIBLE
+char	*gets_s(char *, rsize_t);
+#endif
 void	 perror(const char *);
 int	 printf(const char * __restrict, ...);
 int	 putc(int, FILE *);