Fix OS X build

- Explicitly cast statfs_t members to int64 (this structure is
   platform-specific)
 - Add pass-through New methods to Darwin SHA package
 - Move scsi pkg types to common translation unit (package was empty)
 - Add stub implementations mount/disk ops for OS X

pkg/utils/scsi/mountinfo.go

@@ -31,16 +31,6 @@ import (
 	"github.com/minio/minio/pkg/iodine"
 )
 
-// Mountinfo container to capture /etc/mtab mount structure
-type Mountinfo struct {
-	FSName string /* name of mounted filesystem */
-	Dir    string /* filesystem path prefix */
-	Type   string /* mount type (see mntent.h) */
-	Opts   string /* mount options (see mntent.h) */
-	Freq   int    /* dump frequency in days */
-	Passno int    /* pass number on parallel fsck */
-}
-
 var supportedFSType = map[string]bool{
 	"ext4":  true,
 	"xfs":   true,

pkg/utils/scsi/mountinfo_darwin.go

@@ -0,0 +1,23 @@
+/*
+ * Mini Object Storage, (C) 2014 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package scsi
+
+// GetMountInfo - get mount info map
+func GetMountInfo() (map[string]Mountinfo, error) {
+	// Stub implementation; returns an empty map
+	return make(map[string]Mountinfo), nil
+}

pkg/utils/scsi/scsi-common.go

@@ -1,5 +1,3 @@
-// +build linux,amd64
-
 /*
  * Mini Object Storage, (C) 2014 Minio, Inc.
  *
@@ -25,6 +23,22 @@ import (
 	"strings"
 )
 
+// Attributes Scsi device attributes
+type Attributes map[string]string
+
+// Disks is a list of scsis disks and attributes
+type Disks map[string]Attributes
+
+// Mountinfo container to capture /etc/mtab mount structure
+type Mountinfo struct {
+	FSName string /* name of mounted filesystem */
+	Dir    string /* filesystem path prefix */
+	Type   string /* mount type (see mntent.h) */
+	Opts   string /* mount options (see mntent.h) */
+	Freq   int    /* dump frequency in days */
+	Passno int    /* pass number on parallel fsck */
+}
+
 func getattrs(scsiAttrPath string, scsiAttrList []string) map[string]string {
 	attrMap := make(map[string]string)
 	for _, attr := range scsiAttrList {

pkg/utils/scsi/scsi.go

@@ -28,12 +28,6 @@ import (
 
 // NOTE : supporting virtio based scsi devices is out of scope for this implementation
 
-// Attributes Scsi device attributes
-type Attributes map[string]string
-
-// Disks is a list of scsis disks and attributes
-type Disks map[string]Attributes
-
 // Get get disk scsi params
 func (d Disks) Get(disk string) Attributes {
 	return d[disk]

pkg/utils/scsi/scsi_darwin.go

@@ -0,0 +1,23 @@
+/*
+ * Minimalist Object Storage, (C) 2015 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package scsi
+
+// GetDisks - get system devices list
+func GetDisks() (Disks, error) {
+	// Stub implementation; returns empty disk information
+	return Disks{}, nil
+}

pkg/utils/scsi/scsi_test.go

@@ -1,5 +1,3 @@
-// +build linux,amd64
-
 /*
  * Minimalist Object Storage, (C) 2015 Minio, Inc.
  *