From c9a472c12ff08a6481c086c791f3005e81dbbcf1 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 3 Jul 2016 17:51:40 +0200
Subject: syscallcompat: move syscall wrapper to their own package

We will get more of them as OSX also lacks support for openat.
---
 internal/fusefrontend/compat_linux.go | 35 -----------------------------------
 1 file changed, 35 deletions(-)
 delete mode 100644 internal/fusefrontend/compat_linux.go

(limited to 'internal/fusefrontend/compat_linux.go')

diff --git a/internal/fusefrontend/compat_linux.go b/internal/fusefrontend/compat_linux.go
deleted file mode 100644
index 9a8684f..0000000
--- a/internal/fusefrontend/compat_linux.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package fusefrontend
-
-import (
-	"sync"
-	"syscall"
-)
-
-import "github.com/rfjakob/gocryptfs/internal/tlog"
-
-var preallocWarn sync.Once
-
-// prealloc - preallocate space without changing the file size. This prevents
-// us from running out of space in the middle of an operation.
-func prealloc(fd int, off int64, len int64) (err error) {
-	for {
-		err = syscall.Fallocate(fd, FALLOC_FL_KEEP_SIZE, off, len)
-		if err == syscall.EINTR {
-			// fallocate, like many syscalls, can return EINTR. This is not an
-			// error and just signifies that the operation was interrupted by a
-			// signal and we should try again.
-			continue
-		}
-		if err == syscall.EOPNOTSUPP {
-			// ZFS does not support fallocate which caused gocryptfs to abort
-			// every write operation: https://github.com/rfjakob/gocryptfs/issues/22
-			preallocWarn.Do(func() {
-				tlog.Warn.Printf("Warning: The underlying filesystem " +
-					"does not support fallocate(2). gocryptfs will continue working " +
-					"but is no longer resistant against out-of-space errors.\n")
-			})
-			return nil
-		}
-		return err
-	}
-}
-- 
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