Merge pull request goss-org#1 from gravitational/dmitri/proc-selinux

Update process fetcher to support SELinux-enabled systems.

process_unix.go

@@ -56,22 +56,16 @@ func processes() ([]Process, error) {
 
 	results := make([]Process, 0, 50)
 	for {
-		fis, err := d.Readdir(10)
+		names, err := d.Readdirnames(10)
 		if err == io.EOF {
 			break
 		}
 		if err != nil {
 			return nil, err
 		}
 
-		for _, fi := range fis {
-			// We only care about directories, since all pids are dirs
-			if !fi.IsDir() {
-				continue
-			}
-
+		for _, name := range names {
 			// We only care if the name starts with a numeric
-			name := fi.Name()
 			if name[0] < '0' || name[0] > '9' {
 				continue
 			}