From 6b292bf03472b55f5d5c080d7de0291bd4a994b0 Mon Sep 17 00:00:00 2001
From: Kato Kazuyoshi <kato.kazuyoshi@gmail.com>
Date: Fri, 21 Mar 2014 00:52:00 +0900
Subject: [PATCH] Support FreeBSD on pkg/system/utimes_*.go

Implement system.LUtimesNano and system.UtimesNano. The latter might be
removed in future because it's basically same as os.Chtimes. That's why
the test is mainly focusing LUtimesNano.

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
---
 system/utimes_freebsd.go     | 24 ++++++++++++++
 system/utimes_test.go        | 64 ++++++++++++++++++++++++++++++++++++
 system/utimes_unsupported.go |  2 +-
 3 files changed, 89 insertions(+), 1 deletion(-)
 create mode 100644 system/utimes_freebsd.go
 create mode 100644 system/utimes_test.go

diff --git a/system/utimes_freebsd.go b/system/utimes_freebsd.go
new file mode 100644
index 0000000..ceaa044
--- /dev/null
+++ b/system/utimes_freebsd.go
@@ -0,0 +1,24 @@
+package system
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func LUtimesNano(path string, ts []syscall.Timespec) error {
+	var _path *byte
+	_path, err := syscall.BytePtrFromString(path)
+	if err != nil {
+		return err
+	}
+
+	if _, _, err := syscall.Syscall(syscall.SYS_LUTIMES, uintptr(unsafe.Pointer(_path)), uintptr(unsafe.Pointer(&ts[0])), 0); err != 0 && err != syscall.ENOSYS {
+		return err
+	}
+
+	return nil
+}
+
+func UtimesNano(path string, ts []syscall.Timespec) error {
+	return syscall.UtimesNano(path, ts)
+}
diff --git a/system/utimes_test.go b/system/utimes_test.go
new file mode 100644
index 0000000..38e4020
--- /dev/null
+++ b/system/utimes_test.go
@@ -0,0 +1,64 @@
+package system
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
+)
+
+func prepareFiles(t *testing.T) (string, string, string) {
+	dir, err := ioutil.TempDir("", "docker-system-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	file := filepath.Join(dir, "exist")
+	if err := ioutil.WriteFile(file, []byte("hello"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	invalid := filepath.Join(dir, "doesnt-exist")
+
+	symlink := filepath.Join(dir, "symlink")
+	if err := os.Symlink(file, symlink); err != nil {
+		t.Fatal(err)
+	}
+
+	return file, invalid, symlink
+}
+
+func TestLUtimesNano(t *testing.T) {
+	file, invalid, symlink := prepareFiles(t)
+
+	before, err := os.Stat(file)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ts := []syscall.Timespec{{0, 0}, {0, 0}}
+	if err := LUtimesNano(symlink, ts); err != nil {
+		t.Fatal(err)
+	}
+
+	symlinkInfo, err := os.Lstat(symlink)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if before.ModTime().Unix() == symlinkInfo.ModTime().Unix() {
+		t.Fatal("The modification time of the symlink should be different")
+	}
+
+	fileInfo, err := os.Stat(file)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if before.ModTime().Unix() != fileInfo.ModTime().Unix() {
+		t.Fatal("The modification time of the file should be same")
+	}
+
+	if err := LUtimesNano(invalid, ts); err == nil {
+		t.Fatal("Doesn't return an error on a non-existing file")
+	}
+}
diff --git a/system/utimes_unsupported.go b/system/utimes_unsupported.go
index d247ba2..9a8cf9c 100644
--- a/system/utimes_unsupported.go
+++ b/system/utimes_unsupported.go
@@ -1,4 +1,4 @@
-// +build !linux
+// +build !linux,!freebsd
 
 package system