fix: see if an error is occuring during parsing

plus lots of debug messages

fixes: influxdata#9993

plugins/inputs/smart/smart.go

@@ -719,6 +719,7 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 	// smartctl 5.41 & 5.42 have are broken regarding handling of --nocheck/-n
 	args := []string{"--info", "--health", "--attributes", "--tolerance=verypermissive", "-n", m.Nocheck, "--format=brief"}
 	args = append(args, strings.Split(device, " ")...)
+	fmt.Printf("running '%s %v'\n", m.PathSmartctl, args)
 	out, e := runCmd(m.Timeout, m.UseSudo, m.PathSmartctl, args...)
 	outStr := string(out)
 
@@ -766,6 +767,12 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 		}
 
 		health := smartOverallHealth.FindStringSubmatch(line)
+		if len(health) > 0 {
+			fmt.Printf("found health match in: '%s'\n", line)
+			for index, item := range health {
+				fmt.Printf("%d: '%s'\n", index, item)
+			}
+		}
 		if len(health) > 2 {
 			deviceFields["health_ok"] = health[2] == "PASSED" || health[2] == "OK"
 		}
@@ -795,8 +802,10 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 			}
 		}
 
+		fmt.Println(line)
 		attr := attribute.FindStringSubmatch(line)
 		if len(attr) > 1 {
+			fmt.Println("valid attribute line")
 			// attribute has been found, add it only if m.Attributes is true
 			if m.Attributes {
 				tags["id"] = attr[1]
@@ -819,14 +828,21 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 					fields["raw_value"] = val
 				}
 
+				fmt.Println(tags)
+				fmt.Println(fields)
+
 				acc.AddFields("smart_attribute", fields, tags)
 			}
 
 			// If the attribute matches on the one in deviceFieldIds
 			// save the raw value to a field.
+			fmt.Printf("looking at field id: %s\n", attr[1])
 			if field, ok := deviceFieldIds[attr[1]]; ok {
+				fmt.Printf("found %s parsing '%s'", field, attr[8])
 				if val, err := parseRawValue(attr[8]); err == nil {
 					deviceFields[field] = val
+				} else {
+					fmt.Println("error parsing value: %w", err)
 				}
 			}
 
@@ -841,7 +857,9 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 			}
 		} else {
 			// what was found is not a vendor attribute
+			fmt.Println("not vendor attribute, checking if sas NVME attribute")
 			if matches := sasNVMeAttr.FindStringSubmatch(line); len(matches) > 2 {
+				fmt.Println("found sas nvme attribuate")
 				if attr, ok := sasNVMeAttributes[matches[1]]; ok {
 					tags["name"] = attr.Name
 					if attr.ID != "" {
@@ -857,6 +875,9 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 						acc.AddError(fmt.Errorf("error parsing %s: '%s': %s", attr.Name, matches[2], err.Error()))
 						continue
 					}
+
+					fmt.Println(tags)
+					fmt.Println(fields)
 					// if the field is classified as an attribute, only add it
 					// if m.Attributes is true
 					if m.Attributes {