From 450b65e2e58d9888190d664a2e62eba89463775b Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 21 Jan 2020 13:03:49 +1100
Subject: [PATCH] posix/fd: add an `ftruncate` wrapper

---
 posix/fd.cpp | 10 ++++++++++
 posix/fd.hpp |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/posix/fd.cpp b/posix/fd.cpp
index c910d8b1..115bfd93 100644
--- a/posix/fd.cpp
+++ b/posix/fd.cpp
@@ -215,6 +215,16 @@ fd::lseek (off_t offset, int whence)
 }
 
 
+///////////////////////////////////////////////////////////////////////////////
+void
+fd::truncate (off_t length)
+{
+    error::try_call (
+        ::ftruncate, m_fd, length
+    );
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 fd::operator int (void) const
 {
diff --git a/posix/fd.hpp b/posix/fd.hpp
index cc67f50f..1064b9b0 100644
--- a/posix/fd.hpp
+++ b/posix/fd.hpp
@@ -73,6 +73,10 @@ namespace cruft::posix {
         [[nodiscard]] off_t lseek (off_t offset, int whence);
 
 
+        //---------------------------------------------------------------------
+        void truncate (off_t length);
+
+
         ///////////////////////////////////////////////////////////////////////
         operator int (void) const;
         int native (void) const { return m_fd; }