From 4487cc5a9622d40fb74f2df5cb026438772af5a5 Mon Sep 17 00:00:00 2001
From: guenther <guenther@openbsd.org>
Date: Sat, 14 May 2022 05:06:32 +0000
Subject: [PATCH] Use fseeko() instead of fseek() inside libc, as the latter
 just calls the former with a loss of range.  Mark fseek symbol as deprecated
 to block accidental use in the future.

ok millert@ deraadt@
---
 lib/libc/gen/getcap.c    | 4 ++--
 lib/libc/hidden/stdio.h  | 4 ++--
 lib/libc/rpc/xdr_stdio.c | 4 ++--
 lib/libc/stdio/fseek.c   | 3 +--
 lib/libc/stdio/rewind.c  | 4 ++--
 5 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/lib/libc/gen/getcap.c b/lib/libc/gen/getcap.c
index af866d26cc1..5af3c40d04d 100644
--- a/lib/libc/gen/getcap.c
+++ b/lib/libc/gen/getcap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: getcap.c,v 1.35 2019/07/03 03:24:04 deraadt Exp $	*/
+/*	$OpenBSD: getcap.c,v 1.36 2022/05/14 05:06:32 guenther Exp $	*/
 /*-
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -244,7 +244,7 @@ getent(char **cap, u_int *len, char **db_array, FILE *fp,
 		 * Open database if not already open.
 		 */
 		if (fp != NULL) {
-			(void)fseek(fp, 0L, SEEK_SET);
+			fseeko(fp, 0, SEEK_SET);
 			myfd = 0;
 			opened++;
 		} else {
diff --git a/lib/libc/hidden/stdio.h b/lib/libc/hidden/stdio.h
index 6b03f7ac54e..a40a4b45c1d 100644
--- a/lib/libc/hidden/stdio.h
+++ b/lib/libc/hidden/stdio.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: stdio.h,v 1.7 2016/09/06 19:56:36 guenther Exp $	*/
+/*	$OpenBSD: stdio.h,v 1.8 2022/05/14 05:06:32 guenther Exp $	*/
 /*
  * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
  *
@@ -65,7 +65,7 @@ PROTO_NORMAL(fputs);
 PROTO_NORMAL(fread);
 PROTO_NORMAL(freopen);
 PROTO_NORMAL(fscanf);
-PROTO_NORMAL(fseek);
+PROTO_STD_DEPRECATED(fseek);
 PROTO_NORMAL(fseeko);
 PROTO_NORMAL(fsetpos);
 PROTO_NORMAL(ftell);
diff --git a/lib/libc/rpc/xdr_stdio.c b/lib/libc/rpc/xdr_stdio.c
index 692dcf99a1b..00984136c7b 100644
--- a/lib/libc/rpc/xdr_stdio.c
+++ b/lib/libc/rpc/xdr_stdio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: xdr_stdio.c,v 1.16 2022/02/14 03:38:59 guenther Exp $ */
+/*	$OpenBSD: xdr_stdio.c,v 1.17 2022/05/14 05:06:32 guenther Exp $ */
 
 /*
  * Copyright (c) 2010, Oracle America, Inc.
@@ -144,7 +144,7 @@ static bool_t
 xdrstdio_setpos(XDR *xdrs, u_int pos)
 { 
 
-	return ((fseek((FILE *)xdrs->x_private, (long)pos, SEEK_SET) == -1) ?
+	return ((fseeko((FILE *)xdrs->x_private, pos, SEEK_SET) == -1) ?
 		FALSE : TRUE);
 }
 
diff --git a/lib/libc/stdio/fseek.c b/lib/libc/stdio/fseek.c
index 1d0895a819a..18c530138a6 100644
--- a/lib/libc/stdio/fseek.c
+++ b/lib/libc/stdio/fseek.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fseek.c,v 1.13 2019/06/28 13:32:42 deraadt Exp $ */
+/*	$OpenBSD: fseek.c,v 1.14 2022/05/14 05:06:32 guenther Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -250,4 +250,3 @@ fseek(FILE *fp, long offset, int whence)
 {
 	return (fseeko(fp, offset, whence));
 }
-DEF_STRONG(fseek);
diff --git a/lib/libc/stdio/rewind.c b/lib/libc/stdio/rewind.c
index 4a52ed064a5..63dacc3a232 100644
--- a/lib/libc/stdio/rewind.c
+++ b/lib/libc/stdio/rewind.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rewind.c,v 1.6 2015/08/31 02:53:57 guenther Exp $ */
+/*	$OpenBSD: rewind.c,v 1.7 2022/05/14 05:06:32 guenther Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -37,7 +37,7 @@
 void
 rewind(FILE *fp)
 {
-	(void) fseek(fp, 0L, SEEK_SET);
+	fseeko(fp, 0, SEEK_SET);
 	clearerr(fp);
 	errno = 0;      /* not required, but seems reasonable */
 }
-- 
2.20.1