From 549c59ecf523a879f8a948e8ef0336c36a755fa7 Mon Sep 17 00:00:00 2001
From: John Reiser <jreiser@BitWagon.com>
Date: Wed, 14 Oct 2009 17:44:29 -0700
Subject: [PATCH] fix OutputFile::seek() for SEEK_SET and SEEK_END

---
 src/file.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/file.cpp b/src/file.cpp
index c6ed419e..0d3e3011 100644
--- a/src/file.cpp
+++ b/src/file.cpp
@@ -396,6 +396,17 @@ void OutputFile::rewrite(const void *buf, int len)
 void OutputFile::seek(off_t off, int whence)
 {
     assert(!opt->to_stdout);
+    switch (whence) {
+    case SEEK_SET: {
+        if (bytes_written < off) {
+            bytes_written = off;
+        }
+        _length = bytes_written;  // cheap, lazy update; needed?
+    } break;
+    case SEEK_END: {
+        _length = bytes_written;  // necessary
+    } break;
+    }
     super::seek(off,whence);
 }