Fix filesystem collector for OpenBSD to not print loads of zero bytes in name

Use the filesystem collector for all OpenBSD archs, there is no reason to
only use it on amd64 systems.

Signed-off-by: Claudio Jeker <[email protected]>

Author: cjeker

collector/filesystem_bsd.go

@@ -11,8 +11,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ((openbsd && !amd64) || darwin || dragonfly) && !nofilesystem
-// +build openbsd,!amd64 darwin dragonfly
+//go:build (darwin || dragonfly) && !nofilesystem
+// +build darwin dragonfly
 // +build !nofilesystem
 
 package collector

collector/filesystem_openbsd_amd64.go renamed to collector/filesystem_openbsd.go

@@ -41,14 +41,14 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
 
 	stats = []filesystemStats{}
 	for _, v := range mnt {
-		mountpoint := string(v.F_mntonname[:])
+		mountpoint := unix.ByteSliceToString(v.F_mntonname[:])
 		if c.excludedMountPointsPattern.MatchString(mountpoint) {
 			level.Debug(c.logger).Log("msg", "Ignoring mount point", "mountpoint", mountpoint)
 			continue
 		}
 
-		device := string(v.F_mntfromname[:])
-		fstype := string(v.F_fstypename[:])
+		device := unix.ByteSliceToString(v.F_mntfromname[:])
+		fstype := unix.ByteSliceToString(v.F_fstypename[:])
 		if c.excludedFSTypesPattern.MatchString(fstype) {
 			level.Debug(c.logger).Log("msg", "Ignoring fs type", "type", fstype)
 			continue