Fix ps whitespace parsing errors

src/widgets/proc_unix.go

@@ -23,33 +23,34 @@ func (self *Proc) update() {
 }
 
 func Processes() []Process {
-	output, err := exec.Command("ps", "-axo", "pid,comm:50,pcpu,pmem,args").Output()
+	output, err := exec.Command("ps", "-axo", "pid:10,comm:50,pcpu:5,pmem:5,args").Output()
 	if err != nil {
 		log.Printf("failed to execute 'ps' command: %v", err)
 	}
-	// converts to []string and removes the header
-	strOutput := strings.Split(strings.TrimSpace(string(output)), "\n")[1:]
+
+	// converts to []string, removing trailing newline and header
+	processStrArr := strings.Split(strings.TrimSuffix(string(output), "\n"), "\n")[1:]
+
 	processes := []Process{}
-	for _, line := range strOutput {
-		split := strings.Fields(line)
-		pid, err := strconv.Atoi(split[0])
+	for _, line := range processStrArr {
+		pid, err := strconv.Atoi(strings.TrimSpace(line[0:10]))
 		if err != nil {
-			log.Printf("failed to convert first field to int: %v. split: %v", err, split)
+			log.Printf("failed to convert PID to int: %v. line: %v", err, line)
 		}
-		cpu, err := strconv.ParseFloat(split[2], 64)
+		cpu, err := strconv.ParseFloat(strings.TrimSpace(line[63:68]), 64)
 		if err != nil {
-			log.Printf("failed to convert third field to float: %v. split: %v", err, split)
+			log.Printf("failed to convert CPU usage to float: %v. line: %v", err, line)
 		}
-		mem, err := strconv.ParseFloat(split[3], 64)
+		mem, err := strconv.ParseFloat(strings.TrimSpace(line[69:74]), 64)
 		if err != nil {
-			log.Printf("failed to convert fourth field to float: %v. split: %v", err, split)
+			log.Printf("failed to convert Mem usage to float: %v. line: %v", err, line)
 		}
 		process := Process{
 			PID:     pid,
-			Command: split[1],
+			Command: strings.TrimSpace(line[11:61]),
 			CPU:     cpu,
 			Mem:     mem,
-			Args:    strings.Join(split[4:], " "),
+			Args:    line[74:],
 		}
 		processes = append(processes, process)
 	}