Add new measurement with results of pgrep lookup to procstat input (#4307)

internal/internal.go

@@ -11,6 +11,7 @@ import (
 	"os/exec"
 	"strconv"
 	"strings"
+	"syscall"
 	"time"
 	"unicode"
 )
@@ -193,3 +194,15 @@ func RandomSleep(max time.Duration, shutdown chan struct{}) {
 		return
 	}
 }
+
+// Exit status takes the error from exec.Command
+// and returns the exit status and true
+// if error is not exit status, will return 0 and false
+func ExitStatus(err error) (int, bool) {
+	if exiterr, ok := err.(*exec.ExitError); ok {
+		if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
+			return status.ExitStatus(), true
+		}
+	}
+	return 0, false
+}