a little change

xin053 · xin053 · commit 156f3b01bb10 · 2019-02-25T16:17:15.000+08:00
diff --git a/hsperfdata.go b/hsperfdata.go
@@ -7,6 +7,7 @@ package hsperfdata
 import (
 	"bytes"
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -187,8 +188,8 @@ func DataPathsByProcessName(processName string) (map[string]string, error) {
 	} else {
 		out, err = exec.Command("sh", "-c", "ps -ef|grep -i "+processName+"|grep -v grep").Output()
 	}
-	if err != nil {
-		return nil, err
+	if err != nil || len(out) == 0 {
+		return nil, errors.New(processName + " is not running.")
 	}
 
 	filePaths := make(map[string]string)
@@ -336,3 +337,4 @@ func ReadPerfData(filepath string, parserTime bool) (map[string]interface{}, err
 	}
 	return entryMap, nil
 }
+

Original file line number	Diff line number	Diff line change
`@@ -7,6 +7,7 @@ package hsperfdata`
`7`	`7`	`import (`
`8`	`8`	`"bytes"`
`9`	`9`	`"encoding/binary"`
	`10`	`+ "errors"`
`10`	`11`	`"fmt"`
`11`	`12`	`"io"`
`12`	`13`	`"io/ioutil"`
`@@ -187,8 +188,8 @@ func DataPathsByProcessName(processName string) (map[string]string, error) {`
`187`	`188`	`} else {`
`188`	`189`	`out, err = exec.Command("sh", "-c", "ps -ef\|grep -i "+processName+"\|grep -v grep").Output()`
`189`	`190`	`}`
`190`		`- if err != nil {`
`191`		`- return nil, err`
	`191`	`+ if err != nil \|\| len(out) == 0 {`
	`192`	`+ return nil, errors.New(processName + " is not running.")`
`192`	`193`	`}`
`193`	`194`
`194`	`195`	`filePaths := make(map[string]string)`
`@@ -336,3 +337,4 @@ func ReadPerfData(filepath string, parserTime bool) (map[string]interface{}, err`
`336`	`337`	`}`
`337`	`338`	`return entryMap, nil`
`338`	`339`	`}`
	`340`	`+`