From 437d89a15183a1b2ef66724360bd09a7ef7d9d71 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Tue, 22 Jan 2002 10:44:13 +0000
Subject: (skip): Use fseeko rather than lseek. (Also, check for overflow when
 converting uintmax_t to off_t.)

---
 src/od.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/od.c')

diff --git a/src/od.c b/src/od.c
index ad73bb252..a08a7a5a2 100644
--- a/src/od.c
+++ b/src/od.c
@@ -1081,7 +1081,10 @@ skip (uintmax_t n_skip)
 		n_skip -= file_stats.st_size;
 	      else
 		{
-		  if (lseek (fileno (in_stream), n_skip, SEEK_CUR) < 0)
+		  off_t offset = n_skip;
+		  if (offset == n_skip && 0 <= offset
+		      ? fseeko (in_stream, offset, SEEK_CUR) != 0
+		      : (errno = EOVERFLOW, 1))
 		    {
 		      error (0, errno, "%s", input_filename);
 		      err = 1;
-- 
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