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fs.go
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/
fs.go
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package main
import (
"bytes"
"fmt"
"log"
"net"
"os"
"os/exec"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"syscall"
"github.com/aarzilli/yacco/config"
"github.com/aarzilli/yacco/edit"
"github.com/aarzilli/yacco/hl"
"github.com/aarzilli/yacco/util"
"github.com/lionkov/go9p/p"
"github.com/lionkov/go9p/p/srv"
)
const debugP9 = false
const debugFs = false
var p9ListenAddr string
var p9Srv *CustomP9Server
var p9root *srv.File
var p9il net.Listener
func FsInit() {
var err error
if config.ServeTCP || *acmeCompatFlag {
p9il, err = net.Listen("tcp4", "127.0.0.1:0")
if err != nil {
fmt.Printf("Could not start 9p server: %v\n", err)
os.Exit(1)
}
p9ListenAddr = p9il.Addr().String()
os.Setenv("yp9", p9ListenAddr)
p9il = &ListenLocalOnly{p9il}
if *acmeCompatFlag {
cmdArgs := []string{"9pserve", "-u", "unix!" + makeP9Addr("acme")}
_, err := exec.LookPath(cmdArgs[0])
if err != nil {
na := make([]string, 0, len(cmdArgs)+1)
na = append(na, "9")
na = append(na, cmdArgs...)
cmdArgs = na
_, err := exec.LookPath(cmdArgs[0])
if err != nil {
fmt.Fprintf(os.Stderr, "Could not start compatibility mode: 9 or 9pserve not found\n")
cmdArgs = nil
}
}
if cmdArgs != nil {
acmeCompatStart(cmdArgs[0], cmdArgs[1:])
}
}
} else {
addr := makeP9Addr(fmt.Sprintf("yacco.%d", os.Getpid()))
os.Remove(addr)
p9il, err = net.Listen("unix", addr)
if err != nil {
fmt.Printf("Could not start 9p server: %v\n", err)
os.Exit(1)
}
os.Setenv("yp9", "unix!"+addr)
}
user := p.OsUsers.Uid2User(os.Geteuid())
p9root = new(srv.File)
err = p9root.Add(nil, "/", user, nil, p.DMDIR|0550, nil)
if err != nil {
fmt.Printf("Could not start 9p server: %v\n", err)
os.Exit(1)
}
index := &ReadOnlyP9{srv.File{}, indexFileFn}
index.Add(p9root, "index", user, nil, 0444, index)
stack := &ReadOnlyP9{srv.File{}, stackFileFn}
stack.Add(p9root, "stack", user, nil, 0444, stack)
columns := &ReadWriteP9{srv.File{}, readColumnsFn, writeColumnsFn}
columns.Add(p9root, "columns", user, nil, 0666, columns)
prop := &ReadWriteP9{srv.File{}, readMainPropFn, writeMainPropFn}
prop.Add(p9root, "prop", user, nil, 0666, prop)
log := &ReadOpenP9{srv.File{}, openLogFileFn, readLogFileFn, clunkLogFileFn}
log.Add(p9root, "log", user, nil, 0666, log)
last := &ReadOnlyP9{srv.File{}, lastFileFn}
last.Add(p9root, "last", user, nil, 0444, last)
p9Srv = &CustomP9Server{srv.NewFileSrv(p9root)}
p9Srv.Dotu = true
if debugP9 {
p9Srv.Debuglevel = srv.DbgPrintPackets | srv.DbgPrintFcalls
}
p9Srv.Start(p9Srv)
go func() {
err = p9Srv.StartListener(p9il)
QuitMu.Lock()
if Quitting {
err = nil
}
QuitMu.Unlock()
if err != nil {
fmt.Printf("Could not start 9p server: %v\n", err)
os.Exit(1)
}
}()
}
var QuitMu sync.Mutex
var Quitting bool
func FsQuit() {
QuitMu.Lock()
Quitting = true
QuitMu.Unlock()
HistoryWrite()
for i := range jobs {
jobKill(i)
}
p9il.Close()
os.Exit(0)
}
type ListenLocalOnly struct {
l net.Listener
}
func makeP9Addr(name string) string {
ns := os.Getenv("NAMESPACE")
if ns == "" {
ns = fmt.Sprintf("/tmp/ns.%s.%s", os.Getenv("USER"), os.Getenv("DISPLAY"))
os.MkdirAll(ns, 0700)
}
return filepath.Join(ns, name)
}
func (l *ListenLocalOnly) Accept() (c net.Conn, err error) {
for {
c, err = l.l.Accept()
if err != nil {
return
}
addr := c.RemoteAddr()
if strings.HasPrefix(addr.String(), "127.0.0.1:") {
return
} else {
fmt.Printf("Dropped a connection from: %v\n", addr)
c.Close()
}
}
}
func (l *ListenLocalOnly) Close() error {
return l.l.Close()
}
func (l *ListenLocalOnly) Addr() net.Addr {
return l.l.Addr()
}
func FsAddEditor(n int) {
name := fmt.Sprintf("%d", n)
user := p.OsUsers.Uid2User(os.Geteuid())
bufdir := new(srv.File)
bufdir.Add(p9root, name, user, nil, p.DMDIR|0777, bufdir)
bwr := func(f func(idx int, off int64) ([]byte, syscall.Errno)) func(off int64) ([]byte, syscall.Errno) {
return func(off int64) ([]byte, syscall.Errno) {
return f(n, off)
}
}
bww := func(f func(idx int, data []byte, off int64) syscall.Errno) func(data []byte, off int64) syscall.Errno {
return func(data []byte, off int64) syscall.Errno {
return f(n, data, off)
}
}
addr := &ReadWriteP9{srv.File{}, bwr(readAddrFn), bww(writeAddrFn)}
addr.Add(bufdir, "addr", user, nil, 0660, addr)
byteaddr := &ReadOnlyP9{srv.File{}, bwr(readByteAddrFn)}
byteaddr.Add(bufdir, "byteaddr", user, nil, 0660, byteaddr)
body := &ReadWriteP9{srv.File{}, bwr(readBodyFn), bww(writeBodyFn)}
body.Add(bufdir, "body", user, nil, 0660, body)
color := &ReadWriteP9{srv.File{}, bwr(readColorFn), bww(writeColorFn)}
color.Add(bufdir, "color", user, nil, 0660, color)
ctl := &ReadWriteP9{srv.File{}, bwr(readCtlFn), bww(writeCtlFn)}
ctl.Add(bufdir, "ctl", user, nil, 0660, ctl)
data := &ReadWriteP9{srv.File{}, func(off int64) ([]byte, syscall.Errno) { return readDataFn(n, off, false) }, bww(writeDataFn)}
data.Add(bufdir, "data", user, nil, 0660, data)
xdata := &ReadWriteP9{srv.File{}, func(off int64) ([]byte, syscall.Errno) { return readDataFn(n, off, true) }, bww(writeDataFn)}
xdata.Add(bufdir, "xdata", user, nil, 0660, xdata)
errors := &ReadWriteP9{srv.File{}, bwr(readErrorsFn), bww(writeErrorsFn)}
errors.Add(bufdir, "errors", user, nil, 0660, errors)
tag := &ReadWriteP9{srv.File{}, bwr(readTagFn), bww(writeTagFn)}
tag.Add(bufdir, "tag", user, nil, 0660, tag)
event := &ReadWriteExclP9{srv.File{},
nil, nil,
func(off int64, interrupted chan struct{}) ([]byte, syscall.Errno) {
return readEventFn(n, off, interrupted)
},
bww(writeEventFn),
func() bool { return openEventsFn(n) },
func() { releaseEventsFn(n) }}
event.Add(bufdir, "event", user, nil, p.DMEXCL|0660, event)
prop := &ReadWriteP9{srv.File{}, bwr(readPropFn), bww(writePropFn)}
prop.Add(bufdir, "prop", user, nil, 0660, prop)
jumps := &ReadOnlyP9{srv.File{}, bwr(jumpFileFn)}
jumps.Add(bufdir, "jumps", user, nil, 0440, jumps)
}
func FsRemoveEditor(n int) {
name := fmt.Sprintf("%d", n)
bufdir := p9root.Find(name)
if bufdir != nil {
bufdir.Remove()
}
}
type CustomP9Server struct {
*srv.Fsrv
}
func (s *CustomP9Server) Walk(req *srv.Req) {
if req.Fid.Aux.(*srv.FFid).F != p9root || len(req.Tc.Wname) <= 0 || req.Tc.Wname[0] != "new" {
s.Fsrv.Walk(req)
return
}
done := make(chan int)
sideChan <- func() {
ed, err := HeuristicOpen("+New", false, true)
if err != nil {
fmt.Fprintf(os.Stderr, "Could not execute new: %v\n", err.Error())
done <- -1
} else {
done <- ed.edid
}
}
bidx := <-done
if bidx < 0 {
fmt.Fprintf(os.Stderr, "Internal error, could not create buffer\n")
}
req.Tc.Wname[0] = strconv.Itoa(bidx)
s.Fsrv.Walk(req)
}
func (s *CustomP9Server) Flush(req *srv.Req) {
f, ok := req.Fid.Aux.(*srv.FFid).F.Ops.(*ReadWriteExclP9)
if !ok {
if debugP9 {
fmt.Printf("Flush discarded, not a ReadWriteExcl file\n")
}
return
}
if f.owner == req.Fid.Fconn {
f.owner = nil
close(f.interrupted)
f.closeFn()
if debugP9 {
fmt.Printf("Flush for a ReadWriteExcl file\n")
}
}
}
type P9RootFile struct {
srv.File
}
type ReadOnlyP9 struct {
srv.File
readFn func(off int64) ([]byte, syscall.Errno)
}
func readhelp(buf, b []byte, r syscall.Errno) (int, error) {
if r != 0 {
return 0, r
}
copy(buf, b)
if len(b) < len(buf) {
return len(b), nil
} else {
return len(buf), nil
}
}
func (fh *ReadOnlyP9) Read(fid *srv.FFid, buf []byte, offset uint64) (int, error) {
b, r := fh.readFn(int64(offset))
return readhelp(buf, b, r)
}
type ReadWriteP9 struct {
srv.File
readFn func(off int64) ([]byte, syscall.Errno)
writeFn func(data []byte, off int64) syscall.Errno
}
func (fh *ReadWriteP9) Read(fid *srv.FFid, buf []byte, offset uint64) (int, error) {
b, r := fh.readFn(int64(offset))
return readhelp(buf, b, r)
}
func (fh *ReadWriteP9) Write(fid *srv.FFid, data []byte, offset uint64) (int, error) {
r := fh.writeFn(data, int64(offset))
if r == 0 {
return len(data), nil
} else {
return 0, r
}
}
type ReadWriteExclP9 struct {
srv.File
interrupted chan struct{}
owner *srv.Conn
readFn func(off int64, interrupted chan struct{}) ([]byte, syscall.Errno)
writeFn func(data []byte, off int64) syscall.Errno
openFn func() bool
closeFn func()
}
func (fh *ReadWriteExclP9) Open(fid *srv.FFid, mode uint8) error {
switch mode & 0x3 {
case p.OWRITE:
return nil
case p.OREAD:
case p.ORDWR:
case p.OEXEC:
}
if !fh.openFn() {
return &p.Error{"Already opened", p.EIO}
}
fh.owner = fid.Fid.Fconn
fh.interrupted = make(chan struct{})
return nil
}
func (fh *ReadWriteExclP9) Clunk(fid *srv.FFid) error {
if fh.owner == fid.Fid.Fconn {
fh.owner = nil
close(fh.interrupted)
fh.closeFn()
}
return nil
}
func (fh *ReadWriteExclP9) Read(fid *srv.FFid, buf []byte, offset uint64) (int, error) {
b, r := fh.readFn(int64(offset), fh.interrupted)
return readhelp(buf, b, r)
}
func (fh *ReadWriteExclP9) Write(fid *srv.FFid, data []byte, offset uint64) (int, error) {
r := fh.writeFn(data, int64(offset))
if r == 0 {
return len(data), nil
} else {
return 0, r
}
}
type ReadOpenP9 struct {
srv.File
openFn func(conn string) error
readFn func(conn string) ([]byte, syscall.Errno)
clunkFn func(conn string) error
}
func fidToId(fid *srv.FFid) string {
return fmt.Sprintf("%p", fid.Fid.Fconn)
}
func (fh *ReadOpenP9) Open(fid *srv.FFid, mode uint8) error {
return fh.openFn(fidToId(fid))
}
func (fh *ReadOpenP9) Read(fid *srv.FFid, buf []byte, offset uint64) (int, error) {
b, r := fh.readFn(fidToId(fid))
return readhelp(buf, b, r)
}
func (fh *ReadOpenP9) Clunk(fid *srv.FFid) error {
return fh.clunkFn(fidToId(fid))
}
func acmeCompatStart(cmdName string, cmdArgs []string) {
cmd := exec.Command(cmdName, cmdArgs...)
conn, err := net.Dial("tcp4", p9ListenAddr)
if err != nil {
fmt.Fprintf(os.Stderr, "Could not open connection for 9pserve: %v\n", err)
return
}
f, err := conn.(*net.TCPConn).File()
if err != nil {
fmt.Fprintf(os.Stderr, "Could not open connection for 9pserve (fd): %v\n", err)
return
}
cmd.Stdin = f
cmd.Stdout = f
cmd.Stderr = os.Stderr
go func() {
err := cmd.Run()
if err != nil {
fmt.Fprintf(os.Stderr, "Error in 9pserve: %v\n", err)
}
}()
}
func debugfsf(fmtstr string, args ...interface{}) {
if !debugFs {
return
}
log.Printf(fmtstr, args...)
}
func indexFileFn(off int64) ([]byte, syscall.Errno) {
debugfsf("Read index %d\n", off)
if off > 0 {
return []byte{}, 0
}
done := make(chan string)
sideChan <- func() {
t := ""
for _, col := range Wnd.cols.cols {
for _, ed := range col.editors {
mod := 0
if ed.bodybuf.Modified {
mod = 1
}
dir := 0
if ed.bodybuf.IsDir() {
dir = 1
}
tc := filepath.Join(ed.bodybuf.Dir, ed.bodybuf.Name)
t += fmt.Sprintf("%11d %11d %11d %11d %11d %s\n",
ed.edid, ed.tagbuf.Size(), ed.bodybuf.Size(), dir, mod, tc)
}
}
done <- t
}
return []byte(<-done), 0
}
func lastFileFn(off int64) ([]byte, syscall.Errno) {
debugfsf("Read last %d\n", off)
if off > 0 {
return []byte{}, 0
}
a, b := -1, -1
if activeSel.ed != nil {
a = activeSel.ed.edid
}
if activeSel.zeroxEd != nil {
b = activeSel.zeroxEd.edid
}
return []byte(fmt.Sprintf("%d %d\n", a, b)), 0
}
func stackFileFn(off int64) ([]byte, syscall.Errno) {
b := make([]byte, 5*1024*1024)
n := runtime.Stack(b, true)
if int(off) >= n {
return []byte{}, 0
}
return b[int(off):n], 0
}
func readColumnsFn(off int64) ([]byte, syscall.Errno) {
if off > 0 {
return []byte{}, 0
}
var bw bytes.Buffer
fmt.Fprintf(&bw, "sz")
for i := range Wnd.cols.cols {
fmt.Fprintf(&bw, " %0.4f", Wnd.cols.cols[i].frac/10)
}
fmt.Fprintf(&bw, "\n")
for i := range Wnd.cols.cols {
fmt.Fprintf(&bw, "%d", i)
for j := range Wnd.cols.cols[i].editors {
fmt.Fprintf(&bw, " %d", Wnd.cols.cols[i].editors[j].edid)
}
fmt.Fprintf(&bw, "\n")
}
return bw.Bytes(), 0
}
func writeColumnsFn(data []byte, off int64) syscall.Errno {
const szCmd = "sz "
s := strings.TrimSpace(string(data))
switch s {
case "new":
sideChan <- func() {
NewcolCmd(ExecContext{}, "")
}
return 0
default:
if strings.HasPrefix(s, szCmd) {
v := strings.Split(s[len(szCmd):], " ")
for i := range v {
f, _ := strconv.ParseFloat(v[i], 64)
if f < 0 {
f = 0
}
if i < len(Wnd.cols.cols) {
Wnd.cols.cols[i].frac = f * 10
}
}
Wnd.RedrawHard()
return 0
}
return syscall.EIO
}
}
func readAddrFn(i int, off int64) ([]byte, syscall.Errno) {
if off > 0 {
return []byte{}, 0
}
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
t := ""
done := make(chan bool)
sideChan <- func() {
defer func() {
done <- true
}()
ec.buf.FixSel(&ec.ed.otherSel[OS_ADDR])
t = fmt.Sprintf("%d,%d", ec.ed.otherSel[OS_ADDR].S, ec.ed.otherSel[OS_ADDR].E)
}
<-done
debugfsf("Read addr %s\n", t)
return []byte(t), 0
}
func readByteAddrFn(i int, off int64) ([]byte, syscall.Errno) {
if off > 0 {
return []byte{}, 0
}
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
t := ""
done := make(chan bool)
sideChan <- func() {
defer func() {
done <- true
}()
ec.buf.FixSel(&ec.ed.otherSel[OS_ADDR])
t = fmt.Sprintf("%d,%d", ec.ed.bodybuf.ByteOffset(ec.ed.otherSel[OS_ADDR].S), ec.ed.bodybuf.ByteOffset(ec.ed.otherSel[OS_ADDR].E))
}
<-done
debugfsf("Read byte addr %s\n", t)
return []byte(t), 0
}
func writeAddrFn(i int, data []byte, off int64) (code syscall.Errno) {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
addrstr := string(data)
debugfsf("Write addr %s\n", addrstr)
sideChan <- func() {
defer func() {
if r := recover(); r != nil {
fmt.Println("Error evaluating address: ", r)
code = syscall.EIO
}
}()
ec.ed.otherSel[OS_ADDR] = edit.AddrEval(addrstr, ec.buf, ec.ed.otherSel[OS_ADDR])
}
return 0
}
func readBodyFn(i int, off int64) ([]byte, syscall.Errno) {
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
resp := make(chan []byte)
sideChan <- func() {
//XXX - inefficient
body := []byte(string(ec.buf.SelectionRunes(util.Sel{0, ec.buf.Size()})))
if off < int64(len(body)) {
resp <- body[off:]
} else {
resp <- []byte{}
}
}
r := <-resp
if debugFs {
debugfsf("Read body <%s>\n", string(r))
}
return r, 0
}
func writeBodyFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
sdata := string(data)
if (len(data) == 1) && (data[0] == 0) {
sdata = ""
}
debugfsf("Write body <%s>\n", sdata)
sideChan <- ReplaceMsg(ec, nil, true, sdata, util.EO_BODYTAG, false, false)
return 0
}
func readColorFn(i int, off int64) ([]byte, syscall.Errno) {
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
resp := make(chan []byte)
sideChan <- func() {
//XXX - inefficient
ba, bb := ec.buf.Selection(util.Sel{0, ec.buf.Size()})
text := make([]rune, 0, len(ba)+len(bb))
text = append(text, ba...)
text = append(text, bb...)
color := ec.buf.Highlight(0, ec.buf.Size())
body := util.MixColorHack(text, color)
if off < int64(len(body)) {
resp <- body[off:]
} else {
resp <- []byte{}
}
}
r := <-resp
if debugFs {
debugfsf("Read color\n")
}
return r, 0
}
func writeColorFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
debugfsf("Write color\n")
body, color := util.UnmixColorHack(data)
sideChan <- func() {
start := ec.buf.Size()
ec.buf.Replace(body, &util.Sel{start, start}, true, ec.eventChan, util.EO_BODYTAG)
fhl, isfixed := ec.buf.Hl.(*hl.Fixed)
if !isfixed {
fhl = hl.NewFixed(start)
ec.buf.Hl = fhl
}
fhl.Append(color)
}
return 0
}
func readCtlFn(i int, off int64) ([]byte, syscall.Errno) {
if off > 0 {
return []byte{}, 0
}
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
mod := 0
if ec.ed.bodybuf.Modified {
mod = 1
}
tc := filepath.Join(ec.ed.bodybuf.Dir, ec.ed.bodybuf.Name)
wwidth := ec.ed.r.Max.X - ec.ed.r.Min.X
fontName := ""
switch ec.fr.Font {
case config.MainFont:
fontName = "main"
case config.AltFont:
fontName = "alt"
}
tabWidth := ec.fr.TabWidth
t := fmt.Sprintf("%11d %11d %11d %11d %11d %11d %11s %11d %s\n",
i, ec.ed.tagbuf.Size(), ec.ed.bodybuf.Size(), 0, mod, wwidth, fontName, tabWidth, tc)
debugfsf("Read ctl <%s>\n", t)
return []byte(t), 0
}
func writeCtlFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
cmds := strings.Split(string(data), "\n")
debugfsf("Write ctl %s\n", cmds)
out := make(chan syscall.Errno)
sideChan <- func() {
var r syscall.Errno = 0
for i := range cmds {
cr := ExecFs(ec, cmds[i])
if cr != 0 {
r = cr
}
}
out <- r
}
return <-out
}
func readDataFn(i int, off int64, stopAtAddrEnd bool) ([]byte, syscall.Errno) {
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
if ec.ed == nil {
return nil, syscall.ENOENT
}
resp := make(chan []byte)
sideChan <- func() {
e := ec.buf.Size()
if stopAtAddrEnd {
e = ec.ed.otherSel[OS_ADDR].E
}
data := []byte(string(ec.buf.SelectionRunes(util.Sel{ec.ed.otherSel[OS_ADDR].S, e})))
if off < int64(len(data)) {
resp <- data[off:]
} else {
resp <- []byte{}
}
}
r := <-resp
if debugFs {
debugfsf("Read data <%s>\n", string(r))
}
return r, 0
}
func writeDataFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
sdata := string(data)
if (len(data) == 1) && (data[0] == 0) {
debugfsf("Adjusted data\n")
sdata = ""
}
debugfsf("Write data <%s>\n", sdata)
f := ReplaceMsg(ec, &ec.ed.otherSel[OS_ADDR], false, sdata, util.EO_FILES, false, false)
sideChan <- func() {
matchS := ec.ed.otherSel[OS_ADDR].S == ec.ed.sfr.Fr.Sel.S
matchE := ec.ed.otherSel[OS_ADDR].E == ec.ed.sfr.Fr.Sel.E
f()
if matchS {
ec.ed.sfr.Fr.Sel.S = ec.ed.otherSel[OS_ADDR].S
}
if matchE {
ec.ed.sfr.Fr.Sel.E = ec.ed.otherSel[OS_ADDR].E
}
}
return 0
}
func readErrorsFn(i int, off int64) ([]byte, syscall.Errno) {
return nil, syscall.ENOSYS
}
func writeErrorsFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
if debugFs {
debugfsf("Write errors <%s>\n", string(data))
}
sideChan <- func() {
Warndir(ec.buf.Dir, string(data))
}
return 0
}
func readTagFn(i int, off int64) ([]byte, syscall.Errno) {
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
resp := make(chan []byte)
sideChan <- func() {
body := []byte(string(ec.ed.tagbuf.SelectionRunes(util.Sel{0, ec.ed.tagbuf.Size()})))
if off < int64(len(body)) {
resp <- body[off:]
} else {
resp <- []byte{}
}
}
r := <-resp
if debugFs {
debugfsf("Read tag <%s>\n", string(r))
}
return r, 0
}
func writeTagFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
if debugFs {
debugfsf("Write tag <%s>\n", string(data))
}
sideChan <- func() {
if ec.ed == nil {
return
}
ec.ed.tagbuf.Replace([]rune(string(data)), &util.Sel{ec.ed.tagbuf.EditableStart, ec.ed.tagbuf.Size()}, true, ec.eventChan, util.EO_BODYTAG)
ec.ed.tagfr.Sel.S = ec.ed.tagbuf.Size()
ec.ed.tagfr.Sel.E = ec.ed.tagfr.Sel.S
ec.ed.TagRefresh()
}
return 0
}
func readPropFn(i int, off int64) ([]byte, syscall.Errno) {
if off > 0 {
return []byte{}, 0
}
ec := bufferExecContext(i)
if ec == nil {
return nil, syscall.ENOENT
}
ec.buf.Rdlock()
defer ec.buf.Rdunlock()
s := "AutoDumpPath=" + AutoDumpPath + "\n"
for k, v := range ec.buf.Props {
s += k + "=" + v + "\n"
}
return []byte(s), 0
}
func writePropFn(i int, data []byte, off int64) syscall.Errno {
ec := bufferExecContext(i)
if ec == nil {
return syscall.ENOENT
}
v := strings.SplitN(string(data), "=", 2)
done := make(chan syscall.Errno)
sideChan <- func() {
defer close(done)
if len(v) >= 2 {
if (v[0] == "font") && (v[1] == "switch") {
if ec.buf.Props["font"] == "main" {
ec.buf.Props["font"] = "alt"
} else {
ec.buf.Props["font"] = "main"
}
} else if (v[0] == "font") && ((v[1] == "+") || (v[1] == "-")) {
done <- writeMainPropInternal(data)
return
} else {
ec.buf.Props[v[0]] = v[1]
}
}
if ec.ed != nil {
ec.ed.PropTrigger()
}
done <- 0
}
return <-done
}
func readMainPropFn(off int64) ([]byte, syscall.Errno) {
if off > 0 {
return []byte{}, 0
}
s := ""
for k, v := range Wnd.Prop {
s += k + "=" + v + "\n"
}
wd, _ := os.Getwd()
s += "cwd=" + wd + "\n"
return []byte(s), 0
}
func writeMainPropFn(data []byte, off int64) syscall.Errno {
done := make(chan struct{})
sideChan <- func() {
defer close(done)
writeMainPropInternal(data)
}
<-done
return 0
}
func writeMainPropInternal(data []byte) syscall.Errno {
fontszchange := func() {
config.ReloadFonts(*configFlag)
for _, col := range Wnd.cols.cols {
for _, ed := range col.editors {
ed.PropTrigger()
}
col.PropTrigger()
}
Wnd.tagfr.Font = config.MainFont
Wnd.RedrawHard()
}
v := strings.SplitN(string(data), "=", 2)
if len(v) >= 2 {
if (v[0] == "font") && (v[1] == "switch") {
if Wnd.Prop["font"] == "main" {
Wnd.Prop["font"] = "alt"
} else {
Wnd.Prop["font"] = "main"
}