chore: Fix linter findings for errorlint (part7)

plugins/inputs/rabbitmq/rabbitmq.go

@@ -4,6 +4,7 @@ package rabbitmq
 import (
 	_ "embed"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -381,7 +382,8 @@ func (r *RabbitMQ) requestJSON(u string, target interface{}) error {
 		return err
 	}
 	if err := json.Unmarshal(buf, target); err != nil {
-		if _, ok := err.(*json.UnmarshalTypeError); ok {
+		var jsonErr *json.UnmarshalTypeError
+		if errors.As(err, &jsonErr) {
 			// Try to get the error reason from the response
 			var errResponse ErrorResponse
 			if json.Unmarshal(buf, &errResponse) == nil && errResponse.Error != "" {
@@ -390,7 +392,7 @@ func (r *RabbitMQ) requestJSON(u string, target interface{}) error {
 			}
 		}
 
-		return fmt.Errorf("decoding answer from %q failed: %v", u, err)
+		return fmt.Errorf("decoding answer from %q failed: %w", u, err)
 	}
 
 	return nil

plugins/inputs/raindrops/raindrops.go

@@ -54,7 +54,7 @@ func (r *Raindrops) Gather(acc telegraf.Accumulator) error {
 func (r *Raindrops) gatherURL(addr *url.URL, acc telegraf.Accumulator) error {
 	resp, err := r.httpClient.Get(addr.String())
 	if err != nil {
-		return fmt.Errorf("error making HTTP request to %s: %s", addr.String(), err)
+		return fmt.Errorf("error making HTTP request to %q: %w", addr.String(), err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK {

plugins/inputs/ras/ras.go

@@ -186,7 +186,7 @@ func validateDbPath(dbPath string) error {
 	}
 
 	if err != nil {
-		return fmt.Errorf("cannot get system information for db_path file: [%s] - %v", dbPath, err)
+		return fmt.Errorf("cannot get system information for db_path file %q: %w", dbPath, err)
 	}
 
 	if mode := pathInfo.Mode(); !mode.IsRegular() {

plugins/inputs/redfish/redfish.go

@@ -199,7 +199,7 @@ func (r *Redfish) getData(address string, payload interface{}) error {
 
 	err = json.Unmarshal(body, &payload)
 	if err != nil {
-		return fmt.Errorf("error parsing input: %v", err)
+		return fmt.Errorf("error parsing input: %w", err)
 	}
 
 	return nil

plugins/inputs/redis/redis.go

@@ -238,7 +238,7 @@ func (r *Redis) connect() error {
 
 		u, err := url.Parse(serv)
 		if err != nil {
-			return fmt.Errorf("unable to parse to address %q: %s", serv, err.Error())
+			return fmt.Errorf("unable to parse to address %q: %w", serv, err)
 		}
 
 		username := ""
@@ -329,7 +329,7 @@ func (r *Redis) gatherCommandValues(client Client, acc telegraf.Accumulator) err
 		val, err := client.Do(command.Type, command.Command...)
 		if err != nil {
 			if strings.Contains(err.Error(), "unexpected type=") {
-				return fmt.Errorf("could not get command result: %s", err)
+				return fmt.Errorf("could not get command result: %w", err)
 			}
 
 			return err

plugins/inputs/redis_sentinel/redis_sentinel.go

@@ -62,7 +62,7 @@ func (r *RedisSentinel) Init() error {
 	for _, serv := range r.Servers {
 		u, err := url.Parse(serv)
 		if err != nil {
-			return fmt.Errorf("unable to parse to address %q: %v", serv, err)
+			return fmt.Errorf("unable to parse to address %q: %w", serv, err)
 		}
 
 		password := ""
@@ -136,7 +136,7 @@ func castFieldValue(value string, fieldType configFieldType) (interface{}, error
 	}
 
 	if err != nil {
-		return nil, fmt.Errorf("casting value %v failed: %v", value, err)
+		return nil, fmt.Errorf("casting value %q failed: %w", value, err)
 	}
 
 	return castedValue, nil

plugins/inputs/rethinkdb/rethinkdb.go

@@ -80,7 +80,7 @@ func (r *RethinkDB) gatherServer(server *Server, acc telegraf.Accumulator) error
 
 	server.session, err = gorethink.Connect(connectOpts)
 	if err != nil {
-		return fmt.Errorf("unable to connect to RethinkDB, %s", err.Error())
+		return fmt.Errorf("unable to connect to RethinkDB: %w", err)
 	}
 	defer server.session.Close()
 

plugins/inputs/rethinkdb/rethinkdb_server.go

@@ -22,23 +22,23 @@ type Server struct {
 
 func (s *Server) gatherData(acc telegraf.Accumulator) error {
 	if err := s.getServerStatus(); err != nil {
-		return fmt.Errorf("failed to get server_status, %s", err)
+		return fmt.Errorf("failed to get server_status: %w", err)
 	}
 
 	if err := s.validateVersion(); err != nil {
-		return fmt.Errorf("failed version validation, %s", err.Error())
+		return fmt.Errorf("failed version validation: %w", err)
 	}
 
 	if err := s.addClusterStats(acc); err != nil {
-		return fmt.Errorf("error adding cluster stats, %s", err.Error())
+		return fmt.Errorf("error adding cluster stats: %w", err)
 	}
 
 	if err := s.addMemberStats(acc); err != nil {
-		return fmt.Errorf("error adding member stats, %s", err.Error())
+		return fmt.Errorf("error adding member stats: %w", err)
 	}
 
 	if err := s.addTablesStats(acc); err != nil {
-		return fmt.Errorf("error adding table stats, %s", err.Error())
+		return fmt.Errorf("error adding table stats: %w", err)
 	}
 
 	return nil
@@ -112,12 +112,12 @@ var ClusterTracking = []string{
 func (s *Server) addClusterStats(acc telegraf.Accumulator) error {
 	cursor, err := gorethink.DB("rethinkdb").Table("stats").Get([]string{"cluster"}).Run(s.session)
 	if err != nil {
-		return fmt.Errorf("cluster stats query error, %s", err.Error())
+		return fmt.Errorf("cluster stats query error: %w", err)
 	}
 	defer cursor.Close()
 	var clusterStats stats
 	if err := cursor.One(&clusterStats); err != nil {
-		return fmt.Errorf("failure to parse cluster stats, %s", err.Error())
+		return fmt.Errorf("failure to parse cluster stats: %w", err)
 	}
 
 	tags := s.getDefaultTags()
@@ -140,12 +140,12 @@ var MemberTracking = []string{
 func (s *Server) addMemberStats(acc telegraf.Accumulator) error {
 	cursor, err := gorethink.DB("rethinkdb").Table("stats").Get([]string{"server", s.serverStatus.ID}).Run(s.session)
 	if err != nil {
-		return fmt.Errorf("member stats query error, %s", err.Error())
+		return fmt.Errorf("member stats query error: %w", err)
 	}
 	defer cursor.Close()
 	var memberStats stats
 	if err := cursor.One(&memberStats); err != nil {
-		return fmt.Errorf("failure to parse member stats, %s", err.Error())
+		return fmt.Errorf("failure to parse member stats: %w", err)
 	}
 
 	tags := s.getDefaultTags()
@@ -164,7 +164,7 @@ var TableTracking = []string{
 func (s *Server) addTablesStats(acc telegraf.Accumulator) error {
 	tablesCursor, err := gorethink.DB("rethinkdb").Table("table_status").Run(s.session)
 	if err != nil {
-		return fmt.Errorf("table stats query error, %s", err.Error())
+		return fmt.Errorf("table stats query error: %w", err)
 	}
 
 	defer tablesCursor.Close()
@@ -187,13 +187,13 @@ func (s *Server) addTableStats(acc telegraf.Accumulator, table tableStatus) erro
 		Get([]string{"table_server", table.ID, s.serverStatus.ID}).
 		Run(s.session)
 	if err != nil {
-		return fmt.Errorf("table stats query error, %s", err.Error())
+		return fmt.Errorf("table stats query error: %w", err)
 	}
 	defer cursor.Close()
 
 	var ts tableStats
 	if err := cursor.One(&ts); err != nil {
-		return fmt.Errorf("failure to parse table stats, %s", err.Error())
+		return fmt.Errorf("failure to parse table stats: %w", err)
 	}
 
 	tags := s.getDefaultTags()

plugins/inputs/riak/riak.go

@@ -108,7 +108,7 @@ func (r *Riak) gatherServer(s string, acc telegraf.Accumulator) error {
 	// Parse the given URL to extract the server tag
 	u, err := url.Parse(s)
 	if err != nil {
-		return fmt.Errorf("riak unable to parse given server url %s: %s", s, err)
+		return fmt.Errorf("riak unable to parse given server URL %q: %w", s, err)
 	}
 
 	// Perform the GET request to the riak /stats endpoint
@@ -126,7 +126,7 @@ func (r *Riak) gatherServer(s string, acc telegraf.Accumulator) error {
 	// Decode the response JSON into a new stats struct
 	stats := &riakStats{}
 	if err := json.NewDecoder(resp.Body).Decode(stats); err != nil {
-		return fmt.Errorf("unable to decode riak response: %s", err)
+		return fmt.Errorf("unable to decode riak response: %w", err)
 	}
 
 	// Build a map of tags

plugins/inputs/sensors/sensors.go

@@ -45,7 +45,7 @@ func (s *Sensors) Init() error {
 	if s.path == "" {
 		path, err := exec.LookPath(cmd)
 		if err != nil {
-			return fmt.Errorf("looking up %q failed: %v", cmd, err)
+			return fmt.Errorf("looking up %q failed: %w", cmd, err)
 		}
 		s.path = path
 	}
@@ -78,7 +78,7 @@ func (s *Sensors) parse(acc telegraf.Accumulator) error {
 	cmd := execCommand(s.path, "-A", "-u")
 	out, err := internal.StdOutputTimeout(cmd, time.Duration(s.Timeout))
 	if err != nil {
-		return fmt.Errorf("failed to run command %s: %s - %s", strings.Join(cmd.Args, " "), err, string(out))
+		return fmt.Errorf("failed to run command %q: %w - %s", strings.Join(cmd.Args, " "), err, string(out))
 	}
 	lines := strings.Split(strings.TrimSpace(string(out)), "\n")
 	for _, line := range lines {

plugins/inputs/sflow/packetdecoder.go

@@ -2,12 +2,12 @@ package sflow
 
 import (
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
 
 	"github.com/influxdata/telegraf"
 	"github.com/influxdata/telegraf/plugins/inputs/sflow/binaryio"
-	"github.com/pkg/errors"
 )
 
 type PacketDecoder struct {
@@ -39,7 +39,7 @@ func (d *PacketDecoder) Decode(r io.Reader) error {
 		}
 		d.onPacket(packet)
 	}
-	if err != nil && errors.Cause(err) == io.EOF {
+	if err != nil && errors.Is(err, io.EOF) {
 		return nil
 	}
 	return err
@@ -479,5 +479,8 @@ func (d *PacketDecoder) decodeUDPHeader(r io.Reader) (h UDPHeader, err error) {
 
 func read(r io.Reader, data interface{}, name string) error {
 	err := binary.Read(r, binary.BigEndian, data)
-	return errors.Wrapf(err, "failed to read %s", name)
+	if err != nil {
+		return fmt.Errorf("failed to read %q: %w", name, err)
+	}
+	return nil
 }

plugins/inputs/sflow/sflow.go

@@ -115,7 +115,7 @@ func (s *SFlow) read(acc telegraf.Accumulator, conn net.PacketConn) {
 
 func (s *SFlow) process(acc telegraf.Accumulator, buf []byte) {
 	if err := s.decoder.Decode(bytes.NewBuffer(buf)); err != nil {
-		acc.AddError(fmt.Errorf("unable to parse incoming packet: %s", err))
+		acc.AddError(fmt.Errorf("unable to parse incoming packet: %w", err))
 	}
 }
 

plugins/inputs/slab/slab.go

@@ -98,7 +98,7 @@ func (ss *SlabStats) runCmd(cmd string, args []string) ([]byte, error) {
 
 	out, err := internal.StdOutputTimeout(execCmd, 5*time.Second)
 	if err != nil {
-		return nil, fmt.Errorf("failed to run command %s: %s - %v", execCmd.Args, err, out)
+		return nil, fmt.Errorf("failed to run command %q: %w - %v", execCmd.Args, err, out)
 	}
 
 	return out, nil

plugins/inputs/smart/smart.go

@@ -4,6 +4,7 @@ package smart
 import (
 	"bufio"
 	_ "embed"
+	"errors"
 	"fmt"
 	"os"
 	"os/exec"
@@ -409,7 +410,7 @@ func (m *Smart) Init() error {
 	if err != nil {
 		m.PathSmartctl = ""
 		//without smartctl, plugin will not be able to gather basic metrics
-		return fmt.Errorf("smartctl not found: verify that smartctl is installed and it is in your PATH (or specified in config): %s", err.Error())
+		return fmt.Errorf("smartctl not found: verify that smartctl is installed and it is in your PATH (or specified in config): %w", err)
 	}
 
 	err = validatePath(m.PathNVMe)
@@ -502,7 +503,7 @@ func distinguishNVMeDevices(userDevices []string, availableNVMeDevices []string)
 func (m *Smart) scanDevices(ignoreExcludes bool, scanArgs ...string) ([]string, error) {
 	out, err := runCmd(m.Timeout, m.UseSudo, m.PathSmartctl, scanArgs...)
 	if err != nil {
-		return []string{}, fmt.Errorf("failed to run command '%s %s': %s - %s", m.PathSmartctl, scanArgs, err, string(out))
+		return []string{}, fmt.Errorf("failed to run command '%s %s': %w - %s", m.PathSmartctl, scanArgs, err, string(out))
 	}
 	var devices []string
 	for _, line := range strings.Split(string(out), "\n") {
@@ -666,7 +667,7 @@ func gatherIntelNVMeDisk(acc telegraf.Accumulator, timeout config.Duration, uses
 
 	_, er := exitStatus(e)
 	if er != nil {
-		acc.AddError(fmt.Errorf("failed to run command '%s %s': %s - %s", nvme, strings.Join(args, " "), e, outStr))
+		acc.AddError(fmt.Errorf("failed to run command '%s %s': %w - %s", nvme, strings.Join(args, " "), e, outStr))
 		return
 	}
 
@@ -735,7 +736,7 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 	// Ignore all exit statuses except if it is a command line parse error
 	exitStatus, er := exitStatus(e)
 	if er != nil {
-		acc.AddError(fmt.Errorf("failed to run command '%s %s': %s - %s", m.PathSmartctl, strings.Join(args, " "), e, outStr))
+		acc.AddError(fmt.Errorf("failed to run command '%s %s': %w - %s", m.PathSmartctl, strings.Join(args, " "), e, outStr))
 		return
 	}
 
@@ -882,8 +883,9 @@ func (m *Smart) gatherDisk(acc telegraf.Accumulator, device string, wg *sync.Wai
 // Command line parse errors are denoted by the exit code having the 0 bit set.
 // All other errors are drive/communication errors and should be ignored.
 func exitStatus(err error) (int, error) {
-	if exiterr, ok := err.(*exec.ExitError); ok {
-		if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
+	var exitErr *exec.ExitError
+	if errors.As(err, &exitErr) {
+		if status, ok := exitErr.Sys().(syscall.WaitStatus); ok {
 			return status.ExitStatus(), nil
 		}
 	}

plugins/inputs/snmp/netsnmp.go

@@ -46,8 +46,9 @@ func execCmd(arg0 string, args ...string) ([]byte, error) {
 
 	out, err := execCommand(arg0, args...).Output()
 	if err != nil {
-		if err, ok := err.(*exec.ExitError); ok {
-			return nil, fmt.Errorf("%s: %w", bytes.TrimRight(err.Stderr, "\r\n"), err)
+		var exitErr *exec.ExitError
+		if errors.As(err, &exitErr) {
+			return nil, fmt.Errorf("%s: %w", bytes.TrimRight(exitErr.Stderr, "\r\n"), err)
 		}
 		return nil, err
 	}
@@ -194,7 +195,8 @@ func snmpTranslateCall(oid string) (mibName string, oidNum string, oidText strin
 		out, err = execCmd("snmptranslate", "-Td", "-Ob", oid)
 	} else {
 		out, err = execCmd("snmptranslate", "-Td", "-Ob", "-m", "all", oid)
-		if err, ok := err.(*exec.Error); ok && err.Err == exec.ErrNotFound {
+		var execErr *exec.Error
+		if errors.As(err, &execErr) && errors.Is(execErr, exec.ErrNotFound) {
 			// Silently discard error if snmptranslate not found and we have a numeric OID.
 			// Meaning we can get by without the lookup.
 			return "", oid, oid, "", nil

plugins/inputs/snmp/snmp.go

@@ -488,7 +488,8 @@ func (t Table) Build(gs snmpConnection, walk bool, tr Translator) (*RTable, erro
 				// Our callback always wraps errors in a walkError.
 				// If this error isn't a walkError, we know it's not
 				// from the callback
-				if _, ok := err.(*walkError); !ok {
+				var walkErr *walkError
+				if !errors.As(err, &walkErr) {
 					return nil, fmt.Errorf("performing bulk walk for field %s: %w", f.Name, err)
 				}
 			}

plugins/inputs/snmp_trap/snmp_trap.go

@@ -173,15 +173,15 @@ func (s *SnmpTrap) Start(acc telegraf.Accumulator) error {
 
 		secname, err := s.SecName.Get()
 		if err != nil {
-			return fmt.Errorf("getting secname failed: %v", err)
+			return fmt.Errorf("getting secname failed: %w", err)
 		}
 		privPasswd, err := s.PrivPassword.Get()
 		if err != nil {
-			return fmt.Errorf("getting secname failed: %v", err)
+			return fmt.Errorf("getting secname failed: %w", err)
 		}
 		authPasswd, err := s.AuthPassword.Get()
 		if err != nil {
-			return fmt.Errorf("getting secname failed: %v", err)
+			return fmt.Errorf("getting secname failed: %w", err)
 		}
 		s.listener.Params.SecurityParameters = &gosnmp.UsmSecurityParameters{
 			UserName:                 string(secname),

plugins/inputs/socketstat/socketstat.go

@@ -68,7 +68,7 @@ func socketList(cmdName string, proto string, timeout config.Duration) (*bytes.B
 	cmd.Stdout = &out
 	err := internal.RunTimeout(cmd, time.Duration(timeout))
 	if err != nil {
-		return &out, fmt.Errorf("error running ss -in --%s: %v", proto, err)
+		return &out, fmt.Errorf("error running ss -in --%s: %w", proto, err)
 	}
 	return &out, nil
 }