doc: update README

CHANGELOG.md

@@ -7,6 +7,18 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## Unreleased
 
+### Added
+
+- A comment for all functions
+
+### Changed
+
+- Use fmt.Sprintf to generate file paths
+
+### Removed
+
+- Duplicate array interval
+
 ## v1.0.0 - 2019-06-25
 
 ### Added

README.md

@@ -29,6 +29,12 @@ Output with the swap usage, pid and the command:
 1716 kB [275] /lib/systemd/systemd-udevd
 ```
 
+For more options:
+
+```
+swapus -help
+```
+
 ## License
 
 ```

proc.go

@@ -18,18 +18,21 @@
 package main
 
 import (
+  "fmt"
   "strings"
   "regexp"
   "io/ioutil"
   "strconv"
 )
 
+// Proc is a struct with process information
 type Proc struct {
   Pid int
   CmdLine string
   Swap int
 }
 
+// NewProc initialize a new Proc struct
 func NewProc(pid int) *Proc {
   proc := new(Proc)
   proc.Pid = pid
@@ -39,8 +42,9 @@ func NewProc(pid int) *Proc {
   return proc
 }
 
+// CmdLine return the command line for a process
 func CmdLine(pid int) string {
-  data, err := ioutil.ReadFile("/proc/" + strconv.Itoa(pid) + "/cmdline")
+  data, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/cmdline", pid))
   if err != nil {
     return ""
   }
@@ -49,8 +53,9 @@ func CmdLine(pid int) string {
   return cmdline
 }
 
+// Swap return the swap usage for a process
 func Swap(pid int) int {
-  data, err := ioutil.ReadFile("/proc/" + strconv.Itoa(pid) + "/status")
+  data, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/status", pid))
   if err != nil {
     return 0
   }

swapus.go

@@ -26,6 +26,7 @@ import (
   "path/filepath"
 )
 
+// Variable setted by option
 var (
   LIMIT   = flag.Int("limit", 20, "limit the number of processes to print")
   REVERSE = flag.Bool("reverse", false, "reverse the list of processes to print")
@@ -63,10 +64,10 @@ func main() {
     })
   }
 
-  for _, proc := range procs[:*LIMIT] {
+  for _, proc := range procs {
     if proc.Swap == 0 || proc.CmdLine == "" {
       continue
     }
-    fmt.Printf("%d kB [%d] %v\n", proc.Swap, proc.Pid, proc.CmdLine)
+    fmt.Printf("%d kB [%d] %s\n", proc.Swap, proc.Pid, proc.CmdLine)
   }
 }