From f93729f20da4a7416ec387d9d10a8776dba67c29 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 7 Jan 2016 21:39:41 +0100
Subject: Disable fallocate on OSX (not available and causes a build failure)

---
 pathfs_frontend/compat_linux.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 pathfs_frontend/compat_linux.go

(limited to 'pathfs_frontend/compat_linux.go')

diff --git a/pathfs_frontend/compat_linux.go b/pathfs_frontend/compat_linux.go
new file mode 100644
index 0000000..7ed3c74
--- /dev/null
+++ b/pathfs_frontend/compat_linux.go
@@ -0,0 +1,18 @@
+package pathfs_frontend
+
+import "syscall"
+
+// 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
+		}
+		return err
+	}
+}
-- 
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