D41686.id126801.diff
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	diff --git a/lib/libc/stdio/fopen.3 b/lib/libc/stdio/fopen.3
	--- a/lib/libc/stdio/fopen.3
	+++ b/lib/libc/stdio/fopen.3
	@@ -31,7 +31,7 @@
	.\"
	.\" @(#)fopen.3 8.1 (Berkeley) 6/4/93
	.\"
	-.Dd May 1, 2020
	+.Dd September 1, 2023
	.Dt FOPEN 3
	.Os
	.Sh NAME
	@@ -51,7 +51,7 @@
	.Ft FILE *
	.Fn freopen "const char path" "const char mode" "FILE *stream"
	.Ft FILE *
	-.Fn fmemopen "void restrict buf" "size_t size" "const char * restrict mode"
	+.Fn fmemopen "void * restrict buf" "size_t size" "const char * restrict mode"
	.Sh DESCRIPTION
	The
	.Fn fopen
	@@ -144,8 +144,10 @@
	and do not require an intermediate seek as in previous versions of
	.Em stdio .
	This is not portable to other systems, however;
	-.Tn ANSI C
	-requires that
	+.St -isoC
	+and
	+.St -p1003.1
	+both require that
	a file positioning function intervene between output and input, unless
	an input operation encounters end-of-file.
	.Pp