Vendor in containers/buildah 1.16.1

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/buildah/pkg/rusage/rusage_unix.go

@@ -0,0 +1,35 @@
+// +build !windows
+
+package rusage
+
+import (
+	"syscall"
+	"time"
+
+	"github.com/pkg/errors"
+)
+
+func mkduration(tv syscall.Timeval) time.Duration {
+	return time.Duration(tv.Sec)*time.Second + time.Duration(tv.Usec)*time.Microsecond
+}
+
+func get() (Rusage, error) {
+	var rusage syscall.Rusage
+	err := syscall.Getrusage(syscall.RUSAGE_CHILDREN, &rusage)
+	if err != nil {
+		return Rusage{}, errors.Wrapf(err, "error getting resource usage")
+	}
+	r := Rusage{
+		Date:     time.Now(),
+		Utime:    mkduration(rusage.Utime),
+		Stime:    mkduration(rusage.Stime),
+		Inblock:  int64(rusage.Inblock), // nolint: unconvert
+		Outblock: int64(rusage.Oublock), // nolint: unconvert
+	}
+	return r, nil
+}
+
+// Supported returns true if resource usage counters are supported on this OS.
+func Supported() bool {
+	return true
+}