From 1135c596fdd0099ae104ec643f0a1be655ceb537 Mon Sep 17 00:00:00 2001
From: Stuart W Baker <stuart_w_baker@ymail.com>
Date: Wed, 24 Nov 2021 10:47:13 -0600
Subject: [PATCH] Fix ftruncate build (POSIX version). (#584)

---
 src/os/TempFile.cxx | 11 +++++++++++
 src/os/TempFile.hxx |  6 +-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/os/TempFile.cxx b/src/os/TempFile.cxx
index a422f4075..38b6c2835 100644
--- a/src/os/TempFile.cxx
+++ b/src/os/TempFile.cxx
@@ -66,3 +66,14 @@ TempFile::TempFile(const TempDir& dir, const string& basename)
     fileName_.c_str();
     fd_ = mkstemp((char*)fileName_.c_str());
 }
+
+//
+// TempFile::rewrite()
+//
+void TempFile::rewrite(const string& s)
+{
+    ::lseek(fd_, 0, SEEK_SET);
+    ::ftruncate(fd_, 0);
+    write(s);
+}
+
diff --git a/src/os/TempFile.hxx b/src/os/TempFile.hxx
index 0b9a30ac9..bec4b181e 100644
--- a/src/os/TempFile.hxx
+++ b/src/os/TempFile.hxx
@@ -115,11 +115,7 @@ public:
 
   /// writes the given data to the temporary file from offset 0. @param s is
   /// the data to write.
-  void rewrite(const string& s) {
-      ::lseek(fd_, 0, SEEK_SET);
-      ::ftruncate(fd_, 0);
-      write(s);
-  }
+  void rewrite(const string& s);
     
   /// writes the given data to the temporary file. @param s is the data to
   /// write.