Fixed up the code

files/files.go

@@ -4,49 +4,51 @@ import (
 	"os"
 	"os/exec"
 	"strings"
-	"github.com/shirou/gopsutil/internal/common"
+	"strconv"
+	"github.com/botherder/gopsutil/internal/common"
 )
 
-func FindProcsByFile(file_path string) []int {
+func FindProcsByFile(file_path string) ([]int, error) {
 	if _, err := os.Stat(file_path); err != nil {
-		return []int, err
+		return []int{}, err
 	}
 
 	lsof_bin, err := exec.LookPath("lsof")
 	if err != nil {
-		return []int, err
+		return []int{}, err
 	}
 
 	grep_bin, err := exec.LookPath("grep")
 	if err != nil {
-		return []int, err
+		return []int{}, err
 	}
 
 	awk_bin, err := exec.LookPath("awk")
 	if err != nil {
-		return []int, err
+		return []int{}, err
 	}
 
 	sort_bin, err := exec.LookPath("sort")
 	if err != nil {
-		return []int, err
+		return []int{}, err
 	}
 
 	lsof := exec.Command(lsof_bin, file_path)
-	grep := exec.Command(grep, "-V", "COMMAND")
+	grep := exec.Command(grep_bin, "-v", "COMMAND")
 	awk := exec.Command(awk_bin, "{print $2}")
 	sort := exec.Command(sort_bin, "-u")
 
 	output, _, err := common.Pipeline(lsof, grep, awk, sort)
 	if err != nil {
-		return []int, err
+		return []int{}, err
 	}
 
-	pids := strings.Split(output, "\n")
-	ret := []int
+	pids := strings.Split(string(output), "\n")
+	ret := []int{}
 	for _, pid := range pids {
 		if pid != "" {
-			ret = append(pids, int(pid))
+			int_pid, _ := strconv.Atoi(pid)
+			ret = append(ret, int_pid)
 		}
 	}
 	return ret, nil