/
info.go
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/
info.go
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// info-anvl provides a browser UI for anvl config & docs
// https://github.com/networkimprov/info-anvl
//
// "info.go" HTTP server app
//
// Copyright 2014 by Liam Breck
package main
// #cgo LDFLAGS: -lasound
// #include <stdlib.h>
// #include "alsactl.h"
import "C"
import (
"bytes"
"os"
"path/filepath"
"io"
"io/ioutil"
"fmt"
"net"
"net/http"
"text/template"
"os/exec"
"regexp"
"strconv"
"strings"
"sync"
"time"
"unsafe"
"github.com/gorilla/websocket"
"github.com/kr/pty"
)
var sDirname = filepath.Dir(os.Args[0])+"/share"
var sDebug = strings.Contains(os.Args[0], "-debug")
var sTmpl *template.Template
type tPageData struct { Title string; Main []byte }
const kSocket = "/tmp/info-anvl-wpa-socket"
var sConn *net.UnixConn
func main() {
var err error
if len(os.Args) == 2 {
sDirname = os.Args[1]
var aInfo os.FileInfo
aInfo, err = os.Stat(sDirname)
if err != nil || !aInfo.IsDir() {
fmt.Fprintln(os.Stderr, sDirname, "is not a directory")
os.Exit(1)
}
}
for i,a := range sCmdList { sCmdList[i].c = strings.Replace(a.c, "###", sDirname, 1) }
sTmpl, err = template.ParseFiles(sDirname+"/pagetmpl.html")
if err != nil { panic(err) }
os.Remove(kSocket)
aHost, err := net.ResolveUnixAddr("unixgram", "/run/wpa_supplicant/mlan0")
if err != nil { panic(err) }
aPeer, err := net.ResolveUnixAddr("unixgram", kSocket)
if err != nil { panic(err) }
sConn, err = net.DialUnix("unixgram", aPeer, aHost)
if err != nil { panic(err) }
fmt.Println("ready")
http.HandleFunc("/", reqDoc)
http.HandleFunc("/stat", reqStat)
http.HandleFunc("/con", reqCon)
http.HandleFunc("/ws", reqWs)
http.HandleFunc("/term.js", reqFile)
http.ListenAndServe(":80", nil)
sConn.Close()
}
func reqFile(oResp http.ResponseWriter, iReq *http.Request) {
aF, err := os.Open(sDirname+iReq.URL.Path)
if err != nil { panic(err) }
_, err = io.Copy(oResp, aF)
if err != nil { panic(err) }
}
func reqDoc(oResp http.ResponseWriter, iReq *http.Request) {
aBuf, err := ioutil.ReadFile(sDirname+"/doc.html")
if err != nil { panic(err) }
sTmpl.Execute(oResp, tPageData{ Title:"ANVL Docs", Main:aBuf })
}
type tCommand struct { name, c string; f func(*tCommand); buf []byte }
func statDate(oC *tCommand) {
aS := time.Now().Format("15:04:05 MST Mon 02 Jan 2006")
oC.buf = append(oC.buf, aS...)
if sDebug { fmt.Println(oC.name) }
}
func statKernel(oC *tCommand) {
oC.buf,_ = ioutil.ReadFile("/proc/version")
var aBlank []byte
oC.buf = bytes.Replace(oC.buf, []byte("version "), aBlank, 2)
oC.buf = bytes.Replace(oC.buf, []byte("(liam@localhost) "), aBlank, 1)
if sDebug { fmt.Println(oC.name) }
}
func statBattery(oC *tCommand) {
const kCharger = "/sys/class/power_supply/bq24190-battery/"
const kGauge = "/sys/class/power_supply/bq27425-0/"
aOnline ,_ := ioutil.ReadFile(kCharger+"online")
aHealth ,_ := ioutil.ReadFile(kCharger+"health")
aCharge ,_ := ioutil.ReadFile(kGauge+"capacity")
aCurrent ,_ := ioutil.ReadFile(kGauge+"current_now")
aStatus := "Charging"
if a,_ := strconv.Atoi(string(aCurrent)); a < 0 {
aStatus = "Discharging"
}
aCharge[len(aCharge)-1] = '%'
aOnline = aOnline[:len(aOnline)-1]
aHealth = aHealth[:len(aHealth)-1]
const kFields = "%-11s %-11s %-11s %s\n"
oC.buf = []byte(fmt.Sprintf(kFields+kFields,
"Online", "Charge", "Status", "Health", aOnline, aCharge, aStatus, aHealth))
if sDebug { fmt.Println(oC.name) }
}
func statCpu(oC *tCommand) {
var aPass [2][7]int
var aTotl = [2]int{0,0}
for a:=0; a < len(aPass); a++ {
aBuf,_ := ioutil.ReadFile("/proc/stat")
aLine := bytes.SplitN(aBuf, []byte{'\n'}, 3)
aLine = bytes.SplitN(aLine[1], []byte{' '}, 9)
for aN:=0; aN < len(aPass[0]); aN++ {
aPass[a][aN],_ = strconv.Atoi(string(aLine[aN+1]))
aTotl[a] += aPass[a][aN]
}
if a == 0 {
time.Sleep(time.Duration(150)*time.Millisecond)
}
}
var aArg string
for aN:=0; aN < len(aPass[0]); aN++ {
aPass[0][aN] = (aPass[1][aN] - aPass[0][aN]) * 1000 / (aTotl[1] - aTotl[0])
aArg += fmt.Sprintf("%4d.%d ", aPass[0][aN] / 10, aPass[0][aN] % 10)
}
oC.buf = []byte(fmt.Sprintf("%-6s %-6s %-6s %-6s %-6s %-6s %-6s\n%s\n",
"User %", "Niced", "System", "Idle", "IOWait", "IRQ", "SoftIRQ", aArg))
if sDebug { fmt.Println(oC.name) }
}
func InsertByte(s []byte, p int, b byte) []byte {
s = s[:len(s)+1]
copy(s[p+1:], s[p:])
s[p] = b
return s
}
var sRamKb = regexp.MustCompile(" *([0-9]+)")
func statRam(oC *tCommand) {
aBuf,_ := ioutil.ReadFile("/proc/meminfo")
aLine := bytes.SplitN(aBuf, []byte{'\n'}, 6)
var aPair [5][][]byte
for a := 0; a < 5; a++ {
aPair[a] = bytes.SplitN(aLine[a], []byte{':'}, 2)
aPair[a][1] = sRamKb.FindSubmatch(aPair[a][1])[1]
if len(aPair[a][1]) > 3 {
aPair[a][1] = InsertByte(aPair[a][1], len(aPair[a][1])-3, ',')
}
}
const kFieldTxt = "%-10skB %-12s %-12s %-12s %-12s\n"
const kFieldNum = "%12s %12s %12s %12s %12s\n"
oC.buf = []byte(fmt.Sprintf(kFieldTxt+kFieldNum,
aPair[0][0], aPair[1][0], aPair[2][0], aPair[3][0], aPair[4][0],
aPair[0][1], aPair[1][1], aPair[2][1], aPair[3][1], aPair[4][1]))
if sDebug { fmt.Println(oC.name) }
}
func statWlans(oC *tCommand) {
_,err := sConn.Write([]byte("STATUS"))
if err != nil { panic(err) }
aBuf := make([]byte, 2048)
aLen, err := sConn.Read(aBuf)
if err != nil { panic(err) }
var aSsid string
aLine := bytes.Split(aBuf[:aLen], []byte{'\n'})
for aN:=0; aN < len(aLine); aN++ {
aPair := bytes.SplitN(aLine[aN], []byte{'='}, 2)
if string(aPair[0]) == "ssid" {
aSsid = string(aPair[1])
oC.buf = []byte("<strong style=\"color:blue\">"+aSsid+"</strong> ")
break
}
}
aList,_ := ioutil.ReadDir("/etc/netctl")
for _,a := range aList {
if aLan := a.Name(); len(aLan) > 6 && aLan[:6] == "mlan0-" {
if aLan = aLan[6:]; aLan != aSsid {
oC.buf = append(oC.buf, aLan+" "...)
}
}
}
oC.buf = append(oC.buf, '\n')
if sDebug { fmt.Println(oC.name) }
}
func statAudio(oC *tCommand) {
var aCtx unsafe.Pointer = C.alsactl_open()
oC.buf = []byte("<table style=\"border-spacing:0\"><tr>\n")
aList := []string{"DAC1 Analog", "DAC1 Digital Fine", "DAC1 Digital Coarse"}
for _,a := range aList {
var aMin, aMax, aVol C.long
var aOk C.int = C.alsactl_get_volume(aCtx, C.CString(a), &aMin, &aMax, &aVol)
if int(aOk) != 0 { continue }
const kFields = "<td>%-13s\n vol range\n %3d %d-%d\n</td><td> </td>\n"
oC.buf = append(oC.buf, fmt.Sprintf(kFields, a, int(aVol), int(aMin), int(aMax))...)
}
oC.buf = append(oC.buf, "</tr><tr><td> </td></tr><tr>\n"...)
const kFields = "<td>%-13s\n%13v\n</td><td> </td>\n"
aList = []string{"DAC1 Analog", "HandsfreeL"}
for _,a := range aList {
var aVal C.int
var aOk C.int = C.alsactl_get_switch(aCtx, C.CString(a), &aVal)
if int(aOk) != 0 { continue }
aStr := "on"; if int(aVal) == 0 { aStr = "off" }
oC.buf = append(oC.buf, fmt.Sprintf(kFields, a, aStr)...)
}
aList = []string{"HandsfreeL Mux"}
for _,a := range aList {
var aStr *C.char
var aOk C.int = C.alsactl_get_enum(aCtx, C.CString(a), &aStr)
if int(aOk) != 0 { continue }
oC.buf = append(oC.buf, fmt.Sprintf(kFields, a, C.GoString(aStr))...)
C.free(unsafe.Pointer(aStr))
}
oC.buf = append(oC.buf, "</tr></table>"...)
C.alsactl_close(aCtx)
if sDebug { fmt.Println(oC.name) }
}
func statLeds(oC *tCommand) {
const kLeds = "/sys/class/leds/"
aList,_ := ioutil.ReadDir(kLeds)
const kFields = "%-15s%-11s%-10s%-10s%s\n"
lRestart:
oC.buf = []byte(fmt.Sprintf(kFields, "Device", "Brightness", "Delay_on", "Delay_off", "Trigger"))
for _,a := range aList {
aBright,_ := ioutil.ReadFile(kLeds+a.Name()+"/brightness")
aTriggr,_ := ioutil.ReadFile(kLeds+a.Name()+"/trigger")
aBright = aBright[:len(aBright)-1]
aTriggr = aTriggr[ bytes.IndexRune(aTriggr, '[')+1 : bytes.IndexRune(aTriggr, ']') ]
var aDelayOn, aDelayOff []byte
if bytes.Equal(aTriggr, []byte("timer")) {
aDelayOn ,_ = ioutil.ReadFile(kLeds+a.Name()+"/delay_on")
aDelayOff,_ = ioutil.ReadFile(kLeds+a.Name()+"/delay_off")
if len(aDelayOn) == 0 || len(aDelayOff) == 0 {
goto lRestart
}
aDelayOn = aDelayOn [:len(aDelayOn )-1]
aDelayOff = aDelayOff[:len(aDelayOff)-1]
} else {
aDelayOn = []byte("--")
aDelayOff = aDelayOn
}
oC.buf = append(oC.buf, fmt.Sprintf(kFields, a.Name(), aBright, aDelayOn, aDelayOff, aTriggr)...)
}
if sDebug { fmt.Println(oC.name) }
}
var sCmdList = [...]tCommand {
{ name:"Date", f:statDate },
{ name:"Kernel", f:statKernel },
{ name:"Battery", f:statBattery },
{ name:"Disk", c:"/bin/df -m /" },
{ name:"CPU", f:statCpu },
{ name:"RAM", f:statRam },
{ name:"WLANs", f:statWlans },
{ name:"Wifi", c:"/bin/ip addr show mlan0" },
{ name:"P2P", c:"/bin/ip addr show p2p0" },
{ name:"USB", c:"/bin/ip addr show usb0" },
{ name:"Audio", f:statAudio },
{ name:"LEDs", f:statLeds },
{ name:"PS", c:"/bin/ps -FN --pid 2 --ppid 2,"+fmt.Sprintf("%d", os.Getpid())+" --sort=-time,-rss" },
}
var sStatDoor sync.Mutex
func reqStat(oResp http.ResponseWriter, iReq *http.Request) {
sStatDoor.Lock()
var aHerd sync.WaitGroup
fExec := func(aC *tCommand) {
aArgs := strings.Split(aC.c, " ")
aCmd := exec.Command(aArgs[0], aArgs[1:]...)
aPipe, err := aCmd.StdoutPipe()
if err != nil { panic(err) }
err = aCmd.Start()
if err != nil { panic(err) }
aBuf := make([]byte, 512)
for err = nil; err == nil; {
var aLen int
aLen, err = aPipe.Read(aBuf)
aC.buf = append(aC.buf, aBuf[:aLen]...)
}
if err != io.EOF {
aC.buf = append(aC.buf, fmt.Sprintf("\n%s\n", err)...)
}
if len(aC.buf) > 0 {
aC.buf = aC.buf[:len(aC.buf)-1]
}
err = aCmd.Wait()
if err != nil { fmt.Fprintln(os.Stderr, aC.name, err) }
if sDebug { fmt.Println(aC.name, aC.c) }
if aC.name != "PS" {
aHerd.Done()
}
}
var aProc *tCommand
for a := range sCmdList {
if sCmdList[a].name == "PS" {
aProc = &sCmdList[a]
} else if len(sCmdList[a].c) > 0 {
aHerd.Add(1)
go fExec(&sCmdList[a])
} else {
go sCmdList[a].f(&sCmdList[a])
}
}
fExec(aProc)
aHerd.Wait()
aTable := make([]byte, 0, 8192)
aTable = append(aTable, "<table>\n"...);
const kRow = "<tr><td class=\"stat\">%s</td><td><pre>%s</pre></td></tr>\n"
for a := 0; a < len(sCmdList); a++ {
aTable = append(aTable, fmt.Sprintf(kRow, sCmdList[a].name, sCmdList[a].buf)...) //. protect from html
sCmdList[a].buf = []byte{}
}
aTable = append(aTable, "</table>"...);
sTmpl.Execute(oResp, tPageData{ Title:"ANVL System Stats", Main:aTable })
sStatDoor.Unlock()
}
func reqCon(oResp http.ResponseWriter, iReq *http.Request) {
aBuf, err := ioutil.ReadFile(sDirname+"/console.html")
if err != nil { panic(err) }
sTmpl.Execute(oResp, tPageData{ Title:"ANVL Console", Main:aBuf })
}
var sWsInit = websocket.Upgrader {
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
func reqWs(oResp http.ResponseWriter, iReq *http.Request) {
aSock, err := sWsInit.Upgrade(oResp, iReq, nil)
if err != nil { panic(err) }
aF, err := pty.Start(exec.Command("bash"))
if err != nil { panic(err) }
go func() {
for {
_, aIn, err := aSock.ReadMessage()
if err != nil {
aF.Close()
return
}
aLen, err := aF.Write(aIn)
if err != nil {
aSock.Close()
return
}
if aLen < len(aIn) { panic("pty write overflow") }
}
}()
aOut := make([]byte, sWsInit.WriteBufferSize)
for {
aLen, err := aF.Read(aOut)
if err != nil {
aSock.Close()
return
}
err = aSock.WriteMessage(websocket.TextMessage, aOut[:aLen])
if err != nil {
aF.Close()
return
}
}
}