GShell 0.2.1 − ツイストストリーム

開発:機能GShellでリモートコマンドを実装してる時に思ったのですが、やはり一本のストリーム上でソフトにEOFというかEORを送るのは難しいかなと。

社長:なので制御用とは別に毎回TCPを張って使い捨てるという計画ですよね。FTP式。

開発:それもまた野蛮というか、各レイヤに弊害が出るような予感もするするわけです。特にアプリケーション層で中継する場合には、接続の確立は一大イベントですから、認証もするでしょうしログも取る。エンドーエンドにしても、通信をSSLとかで暗号化するなら、ネゴにかなり重い処理というか遅延が生じる。

開発:1KB程度の不揃いで細かいデータを毎秒10,000個送れるのを目標とするとします。これはネットのバンド幅的には10MB/sでたやすいし、データの出どころがディスクであっても、まあHDDの場合ディレクトリ・ファイルのopenに律速されて状況によるでしょうけど、SSDなら楽勝の数値でしょう。

基盤:へのかっぱですね。HDDにしても、RAM上にinodeとblockが残ってれば、問題ないんじゃないですか。頻繁にアクセスするようなファイルなら。ちょっと実測してみます…

基盤:Goのソースディレクトリの構造はまあ一例ですけど、du で見ると、ディレクトをなめてinode情報を収集するだけなら、1秒に200,000ファイルはイケます。10,000は楽勝です。blockまで読み書きするとなると、tarの例では、2,000ファイル/秒くらいに落ちてます。10,000は厳しいです。

社長:tar xf より cf のほうが遅いというのは意外ですね。

開発:大半はOS時間みたいですね。めっちゃstatとかしてるんでしょうか?

社長:いずれシステムコールをトレースして覗きましょう。

開発:でも GShell 版の rsync というか mirror でのファイル転送では、tar は使わない予定です。ただ find 相当の内部コマンドでディレクトリをなめて、ファイルをかたはしからメタ情報とともに投げる。もちろん tar のようなパディングとか無いです。

開発:毎秒10,000個ということは、一個あたり0.1ミリ秒です。これはLANであってもちょっと厳しいレイテンシ。遠隔なら250msかかってしまうことも有るという実例は我社のフランクフルト支所との通信で目にしているところです。TCPを張ってリクエストとレスポンスをするだけで1秒かかる事は必定。毎秒1個しか送れないことになります。

開発:なので GShell版の sync では、まず受け取り側の 10,000(10K)個のファイルのstatを送る。ファイル名が可変長なので読めないですが、一連のファイル名トラバースの中の相対パスで、ベースネームだけにできる。ファイル名とメタ情報含めて32バイト平均くらいとすれば、320Kバイト。フランクフルトのように1MB/sであったとしても、0.3秒です。というかこれは、データの送信と並行して送っても良い。

開発:次に受け取り側は自分のファイルシステムと比較しながら変化のあるファイルだけを送信する。ここはメタ情報だけで済ませるか、中身のダイジェストまで含めるか、思案のしどころです。

社長:中身まで読んじゃうと tar の例のように 2,000個/秒に落ちてしまうかも知れない。

開発:いえ、あれは tar が遅すぎです。GShellでgrep相当内部コマンドを試した時はもっと高速でした。ちょっと、 チェックサムだけ取るコマンドを作って試してみます…

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開発:そういうわけで、いくつはチェックサム方式を実装して測ってみました。まず、Unix で昔よく使ってた sum コマンドのアルゴリズム。BSDsum と呼ばれてるらしいです。

基盤:23,000ファイル/秒、223MB/s 出てますね。HDDでは厳しいですが、SSDでならイケる可能性のあるスピード。

開発:次は、Go言語のCRC32パッケージによるCRC32。

社長:さすがにCRCの計算でユーザCPU時間が多いですが、それがネックにはならなそうですね。というか、BSD sum より速いんですか…

開発:ちなみに社長が昔自作したCRC32だと、20MB/s でした。tar と同格です。

社長:(^-^;

開発:次に、単純な足し算。まさにsum。SysV sum と同系です。ただし、64ビット。

基盤:流石に速いですね。とはいえ、CRC32の半分程度は食うと…

開発:多数の細かいファイルを読むところで律速されていますが、でっかいファイルのsumなら、2GB/s 以上出ます。もちろん、ファイルがメモリ上にバッファされてた場合ですが。

開発:そして最後に、中身を読まないで外側だけなめる式。ここではサイズの和だけ計算しています。各ファイルの日付とサイズの列をCRCにでもすれば、変更の検出には十分かも知れません。

基盤:SSDならまだ追随するかも知れませんね。

社長:結論としては、tar は GShell版の sync に使うには遅すぎるということですね。

開発:少なくともこのmacOS備え付けのtarでは。ギガビットのインターネット、100MB/s のネットを生かせないですね。20MB/s に律速してしまうかも知れない。それにどの道、大きなファイルの中をブロック化して差分だけsyncする際には、tarの方法は使えないです。

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社長:GShell版のsyncコマンドは jsync とかになるんですか?

開発:いえもういちいちトップレベルのコマンド名を付けるのは面倒なので、x sync とか x put とかにしようと思います。OpenSSL式です。

社長:j じゃなくて x なんですか。

開発:j より x のほうがカッコいいかなみたいな。j の弱点は、特に小文字では見栄えが悪いというか、iと判別がしにくいことです。

基盤:フォントにもよりますが、大文字 X と小文字 x が単体では区別しにくいという問題があると思います。

社長:個人的には y がいいですね。y と Y はふつう明らかに違う。だもんでわたしはDeleGate版のリモートシェルをyyshにしました。b と B でも良いですが。

開発:r と R という線もあると思いますが、r のフォントが一般にしょぼいですね。q も p も t もしょぼい。l は 1と区別がつかないことが多い。k はトポロジー的には K と同じ… そういう観点からは、y と Y も落第ではありますが。候補は、a/A、b/B、d/D、e/E、f/F、g/Gと、h/H、i/I、j/J、n/N、q/Q、r/R、t/T、y/Y あたりですかね。

社長:母音字はIMEと干渉する可能性があっていやですけど、e という小文字は好きです。g はカッコいいけど、下にはみ出てるのがちょっと嫌。b と dとか、h と n とか、 q と p とか、t と f とか、似た形状のがあるのも嫌。

基盤:候補が a/A と e/E に絞られましたw

社長:eは大文字のEの形状ががさつなのが嫌。Fに似てるし。a にしましょう。

基盤:アルファベット中のアルファベットですね。

社長:では a にしましょう。当社としての正式決定です。GShellをやめてAlphaShell に改名すると良いかもですね。略記およびコマンド名は ash。

開発:永遠のアルファ版であると。あ、フォントによってαはいまいち見栄えしないという弱点が… βのほうがカッコいい。

開発:ビルトインコマンドの正式名称も alpha コマンドですかね。あ、そうすると a sync は async を暗示しているみたいで面白いですねw

基盤:なんにしろ内部コマンドは1文字というのは気分が良いです。多分そんな外部コマンドは無いでしょう…

社長:そういえば w がありました。最近はあまり使う必要がなくなりましたが。

開発:zsh は r をビルトインコマンドにしてるんですね。なんだろう・・・ man zshbuiltins。

基盤:それ、alias で良くね?

社長:alias で表現できない事情があるんでしょうね。

開発:しかし今どき、ハイパーテキストでないマニュアルとか、つらすぎますね。GShellではきっちり、HTML/HTTPでビルトインマニュアルをサービスしたいと思います。

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開発:今日はTCPを束ねて使う方法をやってみようと思ったのですが、チェックサムにハマってしまいました。

社長:でもCRCは意外と速いというか。まあ実際ディスクアクセスに使われてるんだから当たり前でしょうけど。

開発:ハードで実装すれば、メモリ転送と同等の速度でイケるでしょうね。ていうか、実際そうなってるんだと思いますが。組み込みのチップにはCRCユニットがふつうに付いてますから、インテルのチップにも当然内蔵していると思うんです。それをユーザに開放しているかですね。

社頭:CRC付きのDMAをユーザが使えると良いですね。というか、GoのReadあたりとか、そもそもOSのread/write, send/recv システムコールにそういうフラグがあればユーザがいちいちか書かなくて良いと思いますが。単なるオクテットストリームの汎用CRC。

開発:ioctl とかにありますかね?

-- 2020-0825 SatoxITS

  • メモ
    1. NNTPにおけるIHAVE/SENDME的プロトコル。双方向にIHAVE。DOYOUHAVE
    2. 常時自分の全ファイルのハッシュを維持して置く。ファイル変更監視。inodeテーブル監視
    3. OOBはSSLライブラリ経由では使えない
    4. TCPを2本以上束ねて使う。緊急チャネルとバックグラウンド的チャネル。無限長データストリームチャネル
/* GShell-0.2.1 by SatoxITS

GShell // a General purpose Shell built on the top of Golang

It is a shell for myself, by myself, of myself. --SatoxITS(^-^)

| NewWindow | Unfold | Fold | Stop | Close | */ /*
Total Source of GShell

The full of this HTML including the Go code is here.

// a window to show source code
*/ /*
Overview
To be written
*/ /*
Go Source Code Index
Implementation Structures import struct Main functions str-expansion // macro processor finder // builtin find + du grep // builtin grep + wc + cksum + ... plugin // plugin commands system // external commands builtin // builtin commands network // socket handler remote-sh // remote shell redirect // StdIn/Out redireciton history // command history rusage // resouce usage encode // encode / decode IME // command line IME getline // line editor scanf // string decomposer interpreter // command interpreter main
*/ //
//Go Source Code
// gsh - Go lang based Shell // (c) 2020 ITS more Co., Ltd. // 2020-0807 created by SatoxITS (sato@its-more.jp) package main // gsh main // Imported packages // Packages import ( "fmt" // fmt "strings" // strings "strconv" // strconv "sort" // sort "time" // time "bufio" // bufio "io/ioutil" // ioutil "os" // os "syscall" // syscall "plugin" // plugin "net" // net "net/http" // http //"html" // html "path/filepath" // filepath "go/types" // types "go/token" // token "encoding/base64" // base64 "unicode/utf8" // utf8 //"gshdata" // gshell's logo and source code "hash/crc32" // crc32 ) var NAME = "gsh" var AUTHOR = "SatoxITS(^-^)/" var VERSION = "0.2.1" var DATE = "2020-08-25" var LINESIZE = (8*1024) var PATHSEP = ":" // should be ";" in Windows var DIRSEP = "/" // canbe \ in Windows var GSH_HOME = ".gsh" // under home directory var MaxStreamSize = int64(128*1024*1024*1024) // 128GiB is too large? var PROMPT = "> " var GSH_PORT = 9999 // -xX logging control // --A-- all // --I-- info. // --D-- debug // --T-- time and resource usage // --W-- warning // --E-- error // --F-- fatal error // --Xn- network // Structures type GCommandHistory struct { StartAt time.Time // command line execution started at EndAt time.Time // command line execution ended at ResCode int // exit code of (external command) CmdError error // error string OutData *os.File // output of the command FoundFile []string // output - result of ufind Rusagev [2]syscall.Rusage // Resource consumption, CPU time or so CmdId int // maybe with identified with arguments or impact // redireciton commands should not be the CmdId WorkDir string // working directory at start WorkDirX int // index in ChdirHistory CmdLine string // command line } type GChdirHistory struct { Dir string MovedAt time.Time CmdIndex int } type CmdMode struct { BackGround bool } type PluginInfo struct { Spec *plugin.Plugin Addr plugin.Symbol Name string // maybe relative Path string // this is in Plugin but hidden } type GServer struct { host string port string } // Digest const ( // SumType SUM_ITEMS = 0x000001 // items count SUM_SIZE = 0x000002 // data length (simplly added) SUM_SIZEHASH = 0x000004 // data length (hashed sequence) SUM_DATEHASH = 0x000008 // date of data (hashed sequence) // also envelope attributes like time stamp can be a part of digest // hashed value of sizes or mod-date of files will be useful to detect changes SUM_WORDS = 0x000010 // word count is a kind of digest SUM_LINES = 0x000020 // line count is a kind of digest SUM_SUM64 = 0x000040 // simple add of bytes, useful for human too SUM_SUM32_BITS = 0x000100 // the number of true bits SUM_SUM32_2BYTE = 0x000200 // 16bits words SUM_SUM32_4BYTE = 0x000400 // 32bits words SUM_SUM32_8BYTE = 0x000800 // 64bits words SUM_SUM16_BSD = 0x001000 // UNIXsum -sum -bsd SUM_SUM16_SYSV = 0x002000 // UNIXsum -sum -sysv SUM_UNIXFILE = 0x004000 SUM_CRCIEEE = 0x008000 ) type CheckSum struct { Files int64 // the number of files (or data) Size int64 // content size Words int64 // word count Lines int64 // line count SumType int Sum64 uint64 Crc32Table crc32.Table Crc32Val uint32 Sum16 int Ctime time.Time Atime time.Time Mtime time.Time Start time.Time Done time.Time RusgAtStart [2]syscall.Rusage RusgAtEnd [2]syscall.Rusage } type ValueStack [][]string type GshContext struct { StartDir string // the current directory at the start GetLine string // gsh-getline command as a input line editor ChdirHistory []GChdirHistory // the 1st entry is wd at the start gshPA syscall.ProcAttr CommandHistory []GCommandHistory CmdCurrent GCommandHistory BackGround bool BackGroundJobs []int LastRusage syscall.Rusage GshHomeDir string TerminalId int CmdTrace bool // should be [map] CmdTime bool // should be [map] PluginFuncs []PluginInfo iValues []string iDelimiter string // field sepearater of print out iFormat string // default print format (of integer) iValStack ValueStack LastServer GServer RSERV string // [gsh://]host[:port] RWD string // remote (target, there) working directory lastCheckSum CheckSum } func nsleep(ns time.Duration){ time.Sleep(ns) } func usleep(ns time.Duration){ nsleep(ns*1000) } func msleep(ns time.Duration){ nsleep(ns*1000000) } func sleep(ns time.Duration){ nsleep(ns*1000000000) } func strBegins(str, pat string)(bool){ if len(pat) <= len(str){ yes := str[0:len(pat)] == pat //fmt.Printf("--D-- strBegins(%v,%v)=%v\n",str,pat,yes) return yes } //fmt.Printf("--D-- strBegins(%v,%v)=%v\n",str,pat,false) return false } func isin(what string, list []string) bool { for _, v := range list { if v == what { return true } } return false } func isinX(what string,list[]string)(int){ for i,v := range list { if v == what { return i } } return -1 } func env(opts []string) { env := os.Environ() if isin("-s", opts){ sort.Slice(env, func(i,j int) bool { return env[i] < env[j] }) } for _, v := range env { fmt.Printf("%v\n",v) } } // - rewriting should be context dependent // - should postpone until the real point of evaluation // - should rewrite only known notation of symobl func scanInt(str string)(val int,leng int){ leng = -1 for i,ch := range str { if '0' <= ch && ch <= '9' { leng = i+1 }else{ break } } if 0 < leng { ival,_ := strconv.Atoi(str[0:leng]) return ival,leng }else{ return 0,0 } } func substHistory(gshCtx *GshContext,str string,i int,rstr string)(leng int,rst string){ if len(str[i+1:]) == 0 { return 0,rstr } hi := 0 histlen := len(gshCtx.CommandHistory) if str[i+1] == '!' { hi = histlen - 1 leng = 1 }else{ hi,leng = scanInt(str[i+1:]) if leng == 0 { return 0,rstr } if hi < 0 { hi = histlen + hi } } if 0 <= hi && hi < histlen { var ext byte if 1 < len(str[i+leng:]) { ext = str[i+leng:][1] } //fmt.Printf("--D-- %v(%c)\n",str[i+leng:],str[i+leng]) if ext == 'f' { leng += 1 xlist := []string{} list := gshCtx.CommandHistory[hi].FoundFile for _,v := range list { //list[i] = escapeWhiteSP(v) xlist = append(xlist,escapeWhiteSP(v)) } //rstr += strings.Join(list," ") rstr += strings.Join(xlist," ") }else if ext == '@' || ext == 'd' { // !N@ .. workdir at the start of the command leng += 1 rstr += gshCtx.CommandHistory[hi].WorkDir }else{ rstr += gshCtx.CommandHistory[hi].CmdLine } }else{ leng = 0 } return leng,rstr } func escapeWhiteSP(str string)(string){ if len(str) == 0 { return "\\z" // empty, to be ignored } rstr := "" for _,ch := range str { switch ch { case '\\': rstr += "\\\\" case ' ': rstr += "\\s" case '\t': rstr += "\\t" case '\r': rstr += "\\r" case '\n': rstr += "\\n" default: rstr += string(ch) } } return rstr } func unescapeWhiteSP(str string)(string){ // strip original escapes rstr := "" for i := 0; i < len(str); i++ { ch := str[i] if ch == '\\' { if i+1 < len(str) { switch str[i+1] { case 'z': continue; } } } rstr += string(ch) } return rstr } func unescapeWhiteSPV(strv []string)([]string){ // strip original escapes ustrv := []string{} for _,v := range strv { ustrv = append(ustrv,unescapeWhiteSP(v)) } return ustrv } // str-expansion // - this should be a macro processor func strsubst(gshCtx *GshContext,str string,histonly bool) string { rbuff := []byte{} if false { //@@U Unicode should be cared as a character return str } //rstr := "" inEsc := 0 // escape characer mode for i := 0; i < len(str); i++ { //fmt.Printf("--D--Subst %v:%v\n",i,str[i:]) ch := str[i] if inEsc == 0 { if ch == '!' { //leng,xrstr := substHistory(gshCtx,str,i,rstr) leng,rs := substHistory(gshCtx,str,i,"") if 0 < leng { //_,rs := substHistory(gshCtx,str,i,"") rbuff = append(rbuff,[]byte(rs)...) i += leng //rstr = xrstr continue } } switch ch { case '\\': inEsc = '\\'; continue //case '%': inEsc = '%'; continue case '$': } } switch inEsc { case '\\': switch ch { case '\\': ch = '\\' case 's': ch = ' ' case 't': ch = '\t' case 'r': ch = '\r' case 'n': ch = '\n' case 'z': inEsc = 0; continue // empty, to be ignored } inEsc = 0 case '%': switch { case ch == '%': ch = '%' case ch == 'T': //rstr = rstr + time.Now().Format(time.Stamp) rs := time.Now().Format(time.Stamp) rbuff = append(rbuff,[]byte(rs)...) inEsc = 0 continue; default: // postpone the interpretation //rstr = rstr + "%" + string(ch) rbuff = append(rbuff,ch) inEsc = 0 continue; } inEsc = 0 } //rstr = rstr + string(ch) rbuff = append(rbuff,ch) } //fmt.Printf("--D--subst(%s)(%s)\n",str,string(rbuff)) return string(rbuff) //return rstr } func showFileInfo(path string, opts []string) { if isin("-l",opts) || isin("-ls",opts) { fi, err := os.Stat(path) if err != nil { fmt.Printf("---------- ((%v))",err) }else{ mod := fi.ModTime() date := mod.Format(time.Stamp) fmt.Printf("%v %8v %s ",fi.Mode(),fi.Size(),date) } } fmt.Printf("%s",path) if isin("-sp",opts) { fmt.Printf(" ") }else if ! isin("-n",opts) { fmt.Printf("\n") } } func userHomeDir()(string,bool){ /* homedir,_ = os.UserHomeDir() // not implemented in older Golang */ homedir,found := os.LookupEnv("HOME") //fmt.Printf("--I-- HOME=%v(%v)\n",homedir,found) if !found { return "/tmp",found } return homedir,found } func toFullpath(path string) (fullpath string) { if path[0] == '/' { return path } pathv := strings.Split(path,DIRSEP) switch { case pathv[0] == ".": pathv[0], _ = os.Getwd() case pathv[0] == "..": // all ones should be interpreted cwd, _ := os.Getwd() ppathv := strings.Split(cwd,DIRSEP) pathv[0] = strings.Join(ppathv,DIRSEP) case pathv[0] == "~": pathv[0],_ = userHomeDir() default: cwd, _ := os.Getwd() pathv[0] = cwd + DIRSEP + pathv[0] } return strings.Join(pathv,DIRSEP) } func IsRegFile(path string)(bool){ fi, err := os.Stat(path) if err == nil { fm := fi.Mode() return fm.IsRegular(); } return false } // Encode / Decode // Encoder func (gshCtx *GshContext)Enc(argv[]string){ file := os.Stdin buff := make([]byte,LINESIZE) li := 0 encoder := base64.NewEncoder(base64.StdEncoding,os.Stdout) for li = 0; ; li++ { count, err := file.Read(buff) if count <= 0 { break } if err != nil { break } encoder.Write(buff[0:count]) } encoder.Close() } func (gshCtx *GshContext)Dec(argv[]string){ decoder := base64.NewDecoder(base64.StdEncoding,os.Stdin) li := 0 buff := make([]byte,LINESIZE) for li = 0; ; li++ { count, err := decoder.Read(buff) if count <= 0 { break } if err != nil { break } os.Stdout.Write(buff[0:count]) } } // lnsp [N] [-crlf][-C \\] func (gshCtx *GshContext)SplitLine(argv[]string){ reader := bufio.NewReaderSize(os.Stdin,64*1024) ni := 0 toi := 0 for ni = 0; ; ni++ { line, err := reader.ReadString('\n') if len(line) <= 0 { if err != nil { fmt.Fprintf(os.Stderr,"--I-- lnsp %d to %d (%v)\n",ni,toi,err) break } } off := 0 ilen := len(line) remlen := len(line) for oi := 0; 0 < remlen; oi++ { olen := remlen addnl := false if 72 < olen { olen = 72 addnl = true } fmt.Fprintf(os.Stderr,"--D-- write %d [%d.%d] %d %d/%d/%d\n", toi,ni,oi,off,olen,remlen,ilen) toi += 1 os.Stdout.Write([]byte(line[0:olen])) if addnl { //os.Stdout.Write([]byte("\r\n")) os.Stdout.Write([]byte("\\")) os.Stdout.Write([]byte("\n")) } line = line[olen:] off += olen remlen -= olen } } fmt.Fprintf(os.Stderr,"--I-- lnsp %d to %d\n",ni,toi) } // CRC32 crc32 // 1 0000 0100 1100 0001 0001 1101 1011 0111 var CRC32UNIX uint32 = uint32(0x04C11DB7) // Unix cksum var CRC32IEEE uint32 = uint32(0xEDB88320) func byteCRC32add(crc uint32,str[]byte,len uint64)(uint32){ var i uint64 for i = 0; i < len; i++ { var oct = str[i] for bi := 0; bi < 8; bi++ { ovf1 := (crc & 0x80000000) != 0 ovf2 := (oct & 0x80) != 0 ovf := (ovf1 && !ovf2) || (!ovf1 && ovf2) oct <<= 1 crc <<= 1 if ovf { crc ^= CRC32UNIX } } } return crc; } func byteCRC32end(crc uint32, len uint64)(uint32){ var slen = make([]byte,4) var li = 0 for li = 0; li < 4; { slen[li] = byte(len) li += 1 len >>= 8 if( len == 0 ){ break } } crc = byteCRC32add(crc,slen,uint64(li)) crc ^= 0xFFFFFFFF return crc } func byteCRC32(str[]byte,len uint64)(crc uint32){ crc = byteCRC32add(0,str,len) crc = byteCRC32end(crc,len) return crc } func CRC32Finish(crc uint32, table *crc32.Table, len uint64)(uint32){ var slen = make([]byte,4) var li = 0 for li = 0; li < 4; { slen[li] = byte(len & 0xFF) li += 1 len >>= 8 if( len == 0 ){ break } } crc = crc32.Update(crc,table,slen) crc ^= 0xFFFFFFFF return crc } func (gsh*GshContext)xCksum(path string,argv[]string, sum*CheckSum)(int64){ if isin("-type/f",argv) && !IsRegFile(path){ return 0 } if isin("-type/d",argv) && IsRegFile(path){ return 0 } file, err := os.OpenFile(path,os.O_RDONLY,0) if err != nil { fmt.Printf("--E-- cksum %v (%v)\n",path,err) return -1 } defer file.Close() if gsh.CmdTrace { fmt.Printf("--I-- cksum %v %v\n",path,argv) } bi := 0 var buff = make([]byte,32*1024) var total int64 = 0 var initTime = time.Time{} if sum.Start == initTime { sum.Start = time.Now() } for bi = 0; ; bi++ { count,err := file.Read(buff) if count <= 0 || err != nil { break } if (sum.SumType & SUM_SUM64) != 0 { s := sum.Sum64 for _,c := range buff[0:count] { s += uint64(c) } sum.Sum64 = s } if (sum.SumType & SUM_UNIXFILE) != 0 { sum.Crc32Val = byteCRC32add(sum.Crc32Val,buff,uint64(count)) } if (sum.SumType & SUM_CRCIEEE) != 0 { sum.Crc32Val = crc32.Update(sum.Crc32Val,&sum.Crc32Table,buff[0:count]) } // BSD checksum if (sum.SumType & SUM_SUM16_BSD) != 0 { s := sum.Sum16 for _,c := range buff[0:count] { s = (s >> 1) + ((s & 1) << 15) s += int(c) s &= 0xFFFF //fmt.Printf("BSDsum: %d[%d] %d\n",sum.Size+int64(i),i,s) } sum.Sum16 = s } if (sum.SumType & SUM_SUM16_SYSV) != 0 { for bj := 0; bj < count; bj++ { sum.Sum16 += int(buff[bj]) } } total += int64(count) } sum.Done = time.Now() sum.Files += 1 sum.Size += total if !isin("-s",argv) { fmt.Printf("%v ",total) } return 0 } // grep // "lines", "lin" or "lnp" for "(text) line processor" or "scanner" // a*,!ab,c, ... sequentioal combination of patterns // what "LINE" is should be definable // generic line-by-line processing // grep [-v] // cat -n -v // uniq [-c] // tail -f // sed s/x/y/ or awk // grep with line count like wc // rewrite contents if specified func (gsh*GshContext)xGrep(path string,rexpv[]string)(int){ file, err := os.OpenFile(path,os.O_RDONLY,0) if err != nil { fmt.Printf("--E-- grep %v (%v)\n",path,err) return -1 } defer file.Close() if gsh.CmdTrace { fmt.Printf("--I-- grep %v %v\n",path,rexpv) } //reader := bufio.NewReaderSize(file,LINESIZE) reader := bufio.NewReaderSize(file,80) li := 0 found := 0 for li = 0; ; li++ { line, err := reader.ReadString('\n') if len(line) <= 0 { break } if 150 < len(line) { // maybe binary break; } if err != nil { break } if 0 <= strings.Index(string(line),rexpv[0]) { found += 1 fmt.Printf("%s:%d: %s",path,li,line) } } //fmt.Printf("total %d lines %s\n",li,path) //if( 0 < found ){ fmt.Printf("((found %d lines %s))\n",found,path); } return found } // Finder // finding files with it name and contents // file names are ORed // show the content with %x fmt list // ls -R // tar command by adding output type fileSum struct { Err int64 // access error or so Size int64 // content size DupSize int64 // content size from hard links Blocks int64 // number of blocks (of 512 bytes) DupBlocks int64 // Blocks pointed from hard links HLinks int64 // hard links Words int64 Lines int64 Files int64 Dirs int64 // the num. of directories SymLink int64 Flats int64 // the num. of flat files MaxDepth int64 MaxNamlen int64 // max. name length nextRepo time.Time } func showFusage(dir string,fusage *fileSum){ bsume := float64(((fusage.Blocks-fusage.DupBlocks)/2)*1024)/1000000.0 //bsumdup := float64((fusage.Blocks/2)*1024)/1000000.0 fmt.Printf("%v: %v files (%vd %vs %vh) %.6f MB (%.2f MBK)\n", dir, fusage.Files, fusage.Dirs, fusage.SymLink, fusage.HLinks, float64(fusage.Size)/1000000.0,bsume); } const ( S_IFMT = 0170000 S_IFCHR = 0020000 S_IFDIR = 0040000 S_IFREG = 0100000 S_IFLNK = 0120000 S_IFSOCK = 0140000 ) func cumFinfo(fsum *fileSum, path string, staterr error, fstat syscall.Stat_t, argv[]string,verb bool)(*fileSum){ now := time.Now() if time.Second <= now.Sub(fsum.nextRepo) { if !fsum.nextRepo.IsZero(){ tstmp := now.Format(time.Stamp) showFusage(tstmp,fsum) } fsum.nextRepo = now.Add(time.Second) } if staterr != nil { fsum.Err += 1 return fsum } fsum.Files += 1 if 1 < fstat.Nlink { // must count only once... // at least ignore ones in the same directory //if finfo.Mode().IsRegular() { if (fstat.Mode & S_IFMT) == S_IFREG { fsum.HLinks += 1 fsum.DupBlocks += int64(fstat.Blocks) //fmt.Printf("---Dup HardLink %v %s\n",fstat.Nlink,path) } } //fsum.Size += finfo.Size() fsum.Size += fstat.Size fsum.Blocks += int64(fstat.Blocks) //if verb { fmt.Printf("(%8dBlk) %s",fstat.Blocks/2,path) } if isin("-ls",argv){ //if verb { fmt.Printf("%4d %8d ",fstat.Blksize,fstat.Blocks) } // fmt.Printf("%d\t",fstat.Blocks/2) } //if finfo.IsDir() if (fstat.Mode & S_IFMT) == S_IFDIR { fsum.Dirs += 1 } //if (finfo.Mode() & os.ModeSymlink) != 0 if (fstat.Mode & S_IFMT) == S_IFLNK { //if verb { fmt.Printf("symlink(%v,%s)\n",fstat.Mode,finfo.Name()) } //{ fmt.Printf("symlink(%o,%s)\n",fstat.Mode,finfo.Name()) } fsum.SymLink += 1 } return fsum } func (gsh*GshContext)xxFindEntv(depth int,total *fileSum,dir string, dstat syscall.Stat_t, ei int, entv []string,npatv[]string,argv[]string)(*fileSum){ nols := isin("-grep",argv) // sort entv /* if isin("-t",argv){ sort.Slice(filev, func(i,j int) bool { return 0 < filev[i].ModTime().Sub(filev[j].ModTime()) }) } */ /* if isin("-u",argv){ sort.Slice(filev, func(i,j int) bool { return 0 < filev[i].AccTime().Sub(filev[j].AccTime()) }) } if isin("-U",argv){ sort.Slice(filev, func(i,j int) bool { return 0 < filev[i].CreatTime().Sub(filev[j].CreatTime()) }) } */ /* if isin("-S",argv){ sort.Slice(filev, func(i,j int) bool { return filev[j].Size() < filev[i].Size() }) } */ for _,filename := range entv { for _,npat := range npatv { match := true if npat == "*" { match = true }else{ match, _ = filepath.Match(npat,filename) } path := dir + DIRSEP + filename if !match { continue } var fstat syscall.Stat_t staterr := syscall.Lstat(path,&fstat) if staterr != nil { if !isin("-w",argv){fmt.Printf("ufind: %v\n",staterr) } continue; } if isin("-du",argv) && (fstat.Mode & S_IFMT) == S_IFDIR { // should not show size of directory in "-du" mode ... }else if !nols && !isin("-s",argv) && (!isin("-du",argv) || isin("-a",argv)) { if isin("-du",argv) { fmt.Printf("%d\t",fstat.Blocks/2) } showFileInfo(path,argv) } if true { // && isin("-du",argv) total = cumFinfo(total,path,staterr,fstat,argv,false) } /* if isin("-wc",argv) { } */ if gsh.lastCheckSum.SumType != 0 { gsh.xCksum(path,argv,&gsh.lastCheckSum); } x := isinX("-grep",argv); // -grep will be convenient like -ls if 0 <= x && x+1 <= len(argv) { // -grep will be convenient like -ls if IsRegFile(path){ found := gsh.xGrep(path,argv[x+1:]) if 0 < found { foundv := gsh.CmdCurrent.FoundFile if len(foundv) < 10 { gsh.CmdCurrent.FoundFile = append(gsh.CmdCurrent.FoundFile,path) } } } } if !isin("-r0",argv) { // -d 0 in du, -depth n in find //total.Depth += 1 if (fstat.Mode & S_IFMT) == S_IFLNK { continue } if dstat.Rdev != fstat.Rdev { fmt.Printf("--I-- don't follow differnet device %v(%v) %v(%v)\n", dir,dstat.Rdev,path,fstat.Rdev) } if (fstat.Mode & S_IFMT) == S_IFDIR { total = gsh.xxFind(depth+1,total,path,npatv,argv) } } } } return total } func (gsh*GshContext)xxFind(depth int,total *fileSum,dir string,npatv[]string,argv[]string)(*fileSum){ nols := isin("-grep",argv) dirfile,oerr := os.OpenFile(dir,os.O_RDONLY,0) if oerr == nil { //fmt.Printf("--I-- %v(%v)[%d]\n",dir,dirfile,dirfile.Fd()) defer dirfile.Close() }else{ } prev := *total var dstat syscall.Stat_t staterr := syscall.Lstat(dir,&dstat) // should be flstat if staterr != nil { if !isin("-w",argv){ fmt.Printf("ufind: %v\n",staterr) } return total } //filev,err := ioutil.ReadDir(dir) //_,err := ioutil.ReadDir(dir) // ReadDir() heavy and bad for huge directory /* if err != nil { if !isin("-w",argv){ fmt.Printf("ufind: %v\n",err) } return total } */ if depth == 0 { total = cumFinfo(total,dir,staterr,dstat,argv,true) if !nols && !isin("-s",argv) && (!isin("-du",argv) || isin("-a",argv)) { showFileInfo(dir,argv) } } // it it is not a directory, just scan it and finish for ei := 0; ; ei++ { entv,rderr := dirfile.Readdirnames(8*1024) if len(entv) == 0 || rderr != nil { //if rderr != nil { fmt.Printf("[%d] len=%d (%v)\n",ei,len(entv),rderr) } break } if 0 < ei { fmt.Printf("--I-- xxFind[%d] %d large-dir: %s\n",ei,len(entv),dir) } total = gsh.xxFindEntv(depth,total,dir,dstat,ei,entv,npatv,argv) } if isin("-du",argv) { // if in "du" mode fmt.Printf("%d\t%s\n",(total.Blocks-prev.Blocks)/2,dir) } return total } // {ufind|fu|ls} [Files] [// Names] [-- Expressions] // Files is "." by default // Names is "*" by default // Expressions is "-print" by default for "ufind", or -du for "fu" command func (gsh*GshContext)xFind(argv[]string){ if 0 < len(argv) && strBegins(argv[0],"?"){ showFound(gsh,argv) return } if isin("-cksum",argv) || isin("-sum",argv) { gsh.lastCheckSum = CheckSum{} if isin("-sum",argv) && isin("-add",argv) { gsh.lastCheckSum.SumType |= SUM_SUM64 }else if isin("-sum",argv) && isin("-size",argv) { gsh.lastCheckSum.SumType |= SUM_SIZE }else if isin("-sum",argv) && isin("-bsd",argv) { gsh.lastCheckSum.SumType |= SUM_SUM16_BSD }else if isin("-sum",argv) && isin("-sysv",argv) { gsh.lastCheckSum.SumType |= SUM_SUM16_SYSV }else if isin("-sum",argv) { gsh.lastCheckSum.SumType |= SUM_SUM64 } if isin("-unix",argv) { gsh.lastCheckSum.SumType |= SUM_UNIXFILE gsh.lastCheckSum.Crc32Table = *crc32.MakeTable(CRC32UNIX) } if isin("-ieee",argv){ gsh.lastCheckSum.SumType |= SUM_CRCIEEE gsh.lastCheckSum.Crc32Table = *crc32.MakeTable(CRC32IEEE) } gsh.lastCheckSum.RusgAtStart = Getrusagev() } var total = fileSum{} npats := []string{} for _,v := range argv { if 0 < len(v) && v[0] != '-' { npats = append(npats,v) } if v == "//" { break } if v == "--" { break } if v == "-grep" { break } if v == "-ls" { break } } if len(npats) == 0 { npats = []string{"*"} } cwd := "." // if to be fullpath ::: cwd, _ := os.Getwd() if len(npats) == 0 { npats = []string{"*"} } fusage := gsh.xxFind(0,&total,cwd,npats,argv) if gsh.lastCheckSum.SumType != 0 { var sumi uint64 = 0 sum := &gsh.lastCheckSum if (sum.SumType & SUM_SIZE) != 0 { sumi = uint64(sum.Size) } if (sum.SumType & SUM_SUM64) != 0 { sumi = sum.Sum64 } if (sum.SumType & SUM_SUM16_SYSV) != 0 { s := uint32(sum.Sum16) r := (s & 0xFFFF) + ((s & 0xFFFFFFFF) >> 16) s = (r & 0xFFFF) + (r >> 16) sum.Crc32Val = uint32(s) sumi = uint64(s) } if (sum.SumType & SUM_SUM16_BSD) != 0 { sum.Crc32Val = uint32(sum.Sum16) sumi = uint64(sum.Sum16) } if (sum.SumType & SUM_UNIXFILE) != 0 { sum.Crc32Val = byteCRC32end(sum.Crc32Val,uint64(sum.Size)) sumi = uint64(byteCRC32end(sum.Crc32Val,uint64(sum.Size))) } if 1 < sum.Files { fmt.Printf("%v %v // %v / %v files, %v/file\r\n", sumi,sum.Size, abssize(sum.Size),sum.Files, abssize(sum.Size/sum.Files)) }else{ fmt.Printf("%v %v %v\n", sumi,sum.Size,npats[0]) } } if !isin("-grep",argv) { showFusage("total",fusage) } if !isin("-s",argv){ hits := len(gsh.CmdCurrent.FoundFile) if 0 < hits { fmt.Printf("--I-- %d files hits // can be refered with !%df\n", hits,len(gsh.CommandHistory)) } } if gsh.lastCheckSum.SumType != 0 { if isin("-ru",argv) { sum := &gsh.lastCheckSum sum.Done = time.Now() gsh.lastCheckSum.RusgAtEnd = Getrusagev() elps := sum.Done.Sub(sum.Start) fmt.Printf("--cksum-size: %v (%v) / %v files, %v/file\r\n", sum.Size,abssize(sum.Size),sum.Files,abssize(sum.Size/sum.Files)) nanos := int64(elps) fmt.Printf("--cksum-time: %v/total, %v/file, %.1f files/s, %v\r\n", abbtime(nanos), abbtime(nanos/sum.Files), (float64(sum.Files)*1000000000.0)/float64(nanos), abbspeed(sum.Size,nanos)) diff := RusageSubv(sum.RusgAtEnd,sum.RusgAtStart) fmt.Printf("--cksum-rusg: %v\n",sRusagef("",argv,diff)) } } return } func showFiles(files[]string){ sp := "" for i,file := range files { if 0 < i { sp = " " } else { sp = "" } fmt.Printf(sp+"%s",escapeWhiteSP(file)) } } func showFound(gshCtx *GshContext, argv[]string){ for i,v := range gshCtx.CommandHistory { if 0 < len(v.FoundFile) { fmt.Printf("!%d (%d) ",i,len(v.FoundFile)) if isin("-ls",argv){ fmt.Printf("\n") for _,file := range v.FoundFile { fmt.Printf("") //sub number? showFileInfo(file,argv) } }else{ showFiles(v.FoundFile) fmt.Printf("\n") } } } } func showMatchFile(filev []os.FileInfo, npat,dir string, argv[]string)(string,bool){ fname := "" found := false for _,v := range filev { match, _ := filepath.Match(npat,(v.Name())) if match { fname = v.Name() found = true //fmt.Printf("[%d] %s\n",i,v.Name()) showIfExecutable(fname,dir,argv) } } return fname,found } func showIfExecutable(name,dir string,argv[]string)(ffullpath string,ffound bool){ var fullpath string if strBegins(name,DIRSEP){ fullpath = name }else{ fullpath = dir + DIRSEP + name } fi, err := os.Stat(fullpath) if err != nil { fullpath = dir + DIRSEP + name + ".go" fi, err = os.Stat(fullpath) } if err == nil { fm := fi.Mode() if fm.IsRegular() { // R_OK=4, W_OK=2, X_OK=1, F_OK=0 if syscall.Access(fullpath,5) == nil { ffullpath = fullpath ffound = true if ! isin("-s", argv) { showFileInfo(fullpath,argv) } } } } return ffullpath, ffound } func which(list string, argv []string) (fullpathv []string, itis bool){ if len(argv) <= 1 { fmt.Printf("Usage: which comand [-s] [-a] [-ls]\n") return []string{""}, false } path := argv[1] if strBegins(path,"/") { // should check if excecutable? _,exOK := showIfExecutable(path,"/",argv) fmt.Printf("--D-- %v exOK=%v\n",path,exOK) return []string{path},exOK } pathenv, efound := os.LookupEnv(list) if ! efound { fmt.Printf("--E-- which: no \"%s\" environment\n",list) return []string{""}, false } showall := isin("-a",argv) || 0 <= strings.Index(path,"*") dirv := strings.Split(pathenv,PATHSEP) ffound := false ffullpath := path for _, dir := range dirv { if 0 <= strings.Index(path,"*") { // by wild-card list,_ := ioutil.ReadDir(dir) ffullpath, ffound = showMatchFile(list,path,dir,argv) }else{ ffullpath, ffound = showIfExecutable(path,dir,argv) } //if ffound && !isin("-a", argv) { if ffound && !showall { break; } } return []string{ffullpath}, ffound } func stripLeadingWSParg(argv[]string)([]string){ for ; 0 < len(argv); { if len(argv[0]) == 0 { argv = argv[1:] }else{ break } } return argv } func xEval(argv []string, nlend bool){ argv = stripLeadingWSParg(argv) if len(argv) == 0 { fmt.Printf("eval [%%format] [Go-expression]\n") return } pfmt := "%v" if argv[0][0] == '%' { pfmt = argv[0] argv = argv[1:] } if len(argv) == 0 { return } gocode := strings.Join(argv," "); //fmt.Printf("eval [%v] [%v]\n",pfmt,gocode) fset := token.NewFileSet() rval, _ := types.Eval(fset,nil,token.NoPos,gocode) fmt.Printf(pfmt,rval.Value) if nlend { fmt.Printf("\n") } } func getval(name string) (found bool, val int) { /* should expand the name here */ if name == "gsh.pid" { return true, os.Getpid() }else if name == "gsh.ppid" { return true, os.Getppid() } return false, 0 } func echo(argv []string, nlend bool){ for ai := 1; ai < len(argv); ai++ { if 1 < ai { fmt.Printf(" "); } arg := argv[ai] found, val := getval(arg) if found { fmt.Printf("%d",val) }else{ fmt.Printf("%s",arg) } } if nlend { fmt.Printf("\n"); } } func resfile() string { return "gsh.tmp" } //var resF *File func resmap() { //_ , err := os.OpenFile(resfile(), os.O_RDWR|os.O_CREATE, os.ModeAppend) // https://developpaper.com/solution-to-golang-bad-file-descriptor-problem/ _ , err := os.OpenFile(resfile(), os.O_RDWR|os.O_CREATE, 0600) if err != nil { fmt.Printf("refF could not open: %s\n",err) }else{ fmt.Printf("refF opened\n") } } // @@2020-0821 func gshScanArg(str string,strip int)(argv []string){ var si = 0 var sb = 0 var inBracket = 0 var arg1 = make([]byte,LINESIZE) var ax = 0 debug := false for ; si < len(str); si++ { if str[si] != ' ' { break } } sb = si for ; si < len(str); si++ { if sb <= si { if debug { fmt.Printf("--Da- +%d %2d-%2d %s ... %s\n", inBracket,sb,si,arg1[0:ax],str[si:]) } } ch := str[si] if ch == '{' { inBracket += 1 if 0 < strip && inBracket <= strip { //fmt.Printf("stripLEV %d <= %d?\n",inBracket,strip) continue } } if 0 < inBracket { if ch == '}' { inBracket -= 1 if 0 < strip && inBracket < strip { //fmt.Printf("stripLEV %d < %d?\n",inBracket,strip) continue } } arg1[ax] = ch ax += 1 continue } if str[si] == ' ' { argv = append(argv,string(arg1[0:ax])) if debug { fmt.Printf("--Da- [%v][%v-%v] %s ... %s\n", -1+len(argv),sb,si,str[sb:si],string(str[si:])) } sb = si+1 ax = 0 continue } arg1[ax] = ch ax += 1 } if sb < si { argv = append(argv,string(arg1[0:ax])) if debug { fmt.Printf("--Da- [%v][%v-%v] %s ... %s\n", -1+len(argv),sb,si,string(arg1[0:ax]),string(str[si:])) } } if debug { fmt.Printf("--Da- %d [%s] => [%d]%v\n",strip,str,len(argv),argv) } return argv } // should get stderr (into tmpfile ?) and return func (gsh*GshContext)Popen(name,mode string)(pin*os.File,pout*os.File,err bool){ var pv = []int{-1,-1} syscall.Pipe(pv) xarg := gshScanArg(name,1) name = strings.Join(xarg," ") pin = os.NewFile(uintptr(pv[0]),"StdoutOf-{"+name+"}") pout = os.NewFile(uintptr(pv[1]),"StdinOf-{"+name+"}") fdix := 0 dir := "?" if mode == "r" { dir = "<" fdix = 1 // read from the stdout of the process }else{ dir = ">" fdix = 0 // write to the stdin of the process } gshPA := gsh.gshPA savfd := gshPA.Files[fdix] var fd uintptr = 0 if mode == "r" { fd = pout.Fd() gshPA.Files[fdix] = pout.Fd() }else{ fd = pin.Fd() gshPA.Files[fdix] = pin.Fd() } // should do this by Goroutine? if false { fmt.Printf("--Ip- Opened fd[%v] %s %v\n",fd,dir,name) fmt.Printf("--RED1 [%d,%d,%d]->[%d,%d,%d]\n", os.Stdin.Fd(),os.Stdout.Fd(),os.Stderr.Fd(), pin.Fd(),pout.Fd(),pout.Fd()) } savi := os.Stdin savo := os.Stdout save := os.Stderr os.Stdin = pin os.Stdout = pout os.Stderr = pout gsh.BackGround = true gsh.gshelllh(name) gsh.BackGround = false os.Stdin = savi os.Stdout = savo os.Stderr = save gshPA.Files[fdix] = savfd return pin,pout,false } // External commands func (gsh*GshContext)excommand(exec bool, argv []string) (notf bool,exit bool) { if gsh.CmdTrace { fmt.Printf("--I-- excommand[%v](%v)\n",exec,argv) } gshPA := gsh.gshPA fullpathv, itis := which("PATH",[]string{"which",argv[0],"-s"}) if itis == false { return true,false } fullpath := fullpathv[0] argv = unescapeWhiteSPV(argv) if 0 < strings.Index(fullpath,".go") { nargv := argv // []string{} gofullpathv, itis := which("PATH",[]string{"which","go","-s"}) if itis == false { fmt.Printf("--F-- Go not found\n") return false,true } gofullpath := gofullpathv[0] nargv = []string{ gofullpath, "run", fullpath } fmt.Printf("--I-- %s {%s %s %s}\n",gofullpath, nargv[0],nargv[1],nargv[2]) if exec { syscall.Exec(gofullpath,nargv,os.Environ()) }else{ pid, _ := syscall.ForkExec(gofullpath,nargv,&gshPA) if gsh.BackGround { fmt.Fprintf(stderr,"--Ip- in Background pid[%d]%d(%v)\n",pid,len(argv),nargv) gsh.BackGroundJobs = append(gsh.BackGroundJobs,pid) }else{ rusage := syscall.Rusage {} syscall.Wait4(pid,nil,0,&rusage) gsh.LastRusage = rusage gsh.CmdCurrent.Rusagev[1] = rusage } } }else{ if exec { syscall.Exec(fullpath,argv,os.Environ()) }else{ pid, _ := syscall.ForkExec(fullpath,argv,&gshPA) //fmt.Printf("[%d]\n",pid); // '&' to be background if gsh.BackGround { fmt.Fprintf(stderr,"--Ip- in Background pid[%d]%d(%v)\n",pid,len(argv),argv) gsh.BackGroundJobs = append(gsh.BackGroundJobs,pid) }else{ rusage := syscall.Rusage {} syscall.Wait4(pid,nil,0,&rusage); gsh.LastRusage = rusage gsh.CmdCurrent.Rusagev[1] = rusage } } } return false,false } // Builtin Commands func (gshCtx *GshContext) sleep(argv []string) { if len(argv) < 2 { fmt.Printf("Sleep 100ms, 100us, 100ns, ...\n") return } duration := argv[1]; d, err := time.ParseDuration(duration) if err != nil { d, err = time.ParseDuration(duration+"s") if err != nil { fmt.Printf("duration ? %s (%s)\n",duration,err) return } } //fmt.Printf("Sleep %v\n",duration) time.Sleep(d) if 0 < len(argv[2:]) { gshCtx.gshellv(argv[2:]) } } func (gshCtx *GshContext)repeat(argv []string) { if len(argv) < 2 { return } start0 := time.Now() for ri,_ := strconv.Atoi(argv[1]); 0 < ri; ri-- { if 0 < len(argv[2:]) { //start := time.Now() gshCtx.gshellv(argv[2:]) end := time.Now() elps := end.Sub(start0); if( 1000000000 < elps ){ fmt.Printf("(repeat#%d %v)\n",ri,elps); } } } } func (gshCtx *GshContext)gen(argv []string) { gshPA := gshCtx.gshPA if len(argv) < 2 { fmt.Printf("Usage: %s N\n",argv[0]) return } // should br repeated by "repeat" command count, _ := strconv.Atoi(argv[1]) fd := gshPA.Files[1] // Stdout file := os.NewFile(fd,"internalStdOut") fmt.Printf("--I-- Gen. Count=%d to [%d]\n",count,file.Fd()) //buf := []byte{} outdata := "0123 5678 0123 5678 0123 5678 0123 5678\r" for gi := 0; gi < count; gi++ { file.WriteString(outdata) } //file.WriteString("\n") fmt.Printf("\n(%d B)\n",count*len(outdata)); //file.Close() } // Remote Execution // 2020-0820 func Elapsed(from time.Time)(string){ elps := time.Now().Sub(from) if 1000000000 < elps { return fmt.Sprintf("[%5d.%02ds]",elps/1000000000,(elps%1000000000)/10000000) }else if 1000000 < elps { return fmt.Sprintf("[%3d.%03dms]",elps/1000000,(elps%1000000)/1000) }else{ return fmt.Sprintf("[%3d.%03dus]",elps/1000,(elps%1000)) } } func abbtime(nanos int64)(string){ if 1000000000 < nanos { return fmt.Sprintf("%d.%02ds",nanos/1000000000,(nanos%1000000000)/10000000) }else if 1000000 < nanos { return fmt.Sprintf("%d.%03dms",nanos/1000000,(nanos%1000000)/1000) }else{ return fmt.Sprintf("%d.%03dus",nanos/1000,(nanos%1000)) } } func abssize(size int64)(string){ fsize := float64(size) if 1024*1024*1024 < size { return fmt.Sprintf("%.2fGiB",fsize/(1024*1024*1024)) }else if 1024*1024 < size { return fmt.Sprintf("%.3fMiB",fsize/(1024*1024)) }else{ return fmt.Sprintf("%.3fKiB",fsize/1024) } } func absize(size int64)(string){ fsize := float64(size) if 1024*1024*1024 < size { return fmt.Sprintf("%8.2fGiB",fsize/(1024*1024*1024)) }else if 1024*1024 < size { return fmt.Sprintf("%8.3fMiB",fsize/(1024*1024)) }else{ return fmt.Sprintf("%8.3fKiB",fsize/1024) } } func abbspeed(totalB int64,ns int64)(string){ MBs := (float64(totalB)/1000000) / (float64(ns)/1000000000) if 1000 <= MBs { return fmt.Sprintf("%6.3fGB/s",MBs/1000) } if 1 <= MBs { return fmt.Sprintf("%6.3fMB/s",MBs) }else{ return fmt.Sprintf("%6.3fKB/s",MBs*1000) } } func abspeed(totalB int64,ns time.Duration)(string){ MBs := (float64(totalB)/1000000) / (float64(ns)/1000000000) if 1000 <= MBs { return fmt.Sprintf("%6.3fGBps",MBs/1000) } if 1 <= MBs { return fmt.Sprintf("%6.3fMBps",MBs) }else{ return fmt.Sprintf("%6.3fKBps",MBs*1000) } } func fileRelay(what string,in*os.File,out*os.File,size int64,bsiz int)(wcount int64){ Start := time.Now() buff := make([]byte,bsiz) var total int64 = 0 var rem int64 = size nio := 0 Prev := time.Now() var PrevSize int64 = 0 fmt.Printf(Elapsed(Start)+"--In- X: %s (%v/%v/%v) START\n", what,absize(total),size,nio) for i:= 0; ; i++ { var len = bsiz if int(rem) < len { len = int(rem) } Now := time.Now() Elps := Now.Sub(Prev); if 1000000000 < Now.Sub(Prev) { fmt.Printf(Elapsed(Start)+"--In- X: %s (%v/%v/%v) %s\n", what,absize(total),size,nio, abspeed((total-PrevSize),Elps)) Prev = Now; PrevSize = total } rlen := len if in != nil { // should watch the disconnection of out rcc,err := in.Read(buff[0:rlen]) if err != nil { fmt.Printf(Elapsed(Start)+"--En- X: %s read(%v,%v)<%v\n", what,rcc,err,in.Name()) break } rlen = rcc if string(buff[0:10]) == "((SoftEOF " { var ecc int64 = 0 fmt.Sscanf(string(buff),"((SoftEOF %v",&ecc) fmt.Printf(Elapsed(Start)+"--En- X: %s Recv ((SoftEOF %v))/%v\n", what,ecc,total) if ecc == total { break } } } wlen := rlen if out != nil { wcc,err := out.Write(buff[0:rlen]) if err != nil { fmt.Printf(Elapsed(Start)+"-En-- X: %s write(%v,%v)>%v\n", what,wcc,err,out.Name()) break } wlen = wcc } if wlen < rlen { fmt.Printf(Elapsed(Start)+"--En- X: %s incomplete write (%v/%v)\n", what,wlen,rlen) break; } nio += 1 total += int64(rlen) rem -= int64(rlen) if rem <= 0 { break } } Done := time.Now() Elps := float64(Done.Sub(Start))/1000000000 //Seconds TotalMB := float64(total)/1000000 //MB MBps := TotalMB / Elps fmt.Printf(Elapsed(Start)+"--In- X: %s (%v/%v/%v) %v %.3fMB/s\n", what,total,size,nio,absize(total),MBps) return total } func tcpPush(clnt *os.File){ // shrink socket buffer and recover usleep(100); } func (gsh*GshContext)RexecServer(argv[]string){ debug := true Start0 := time.Now() Start := Start0 // if local == ":" { local = "0.0.0.0:9999" } local := "0.0.0.0:9999" if 0 < len(argv) { if argv[0] == "-s" { debug = false argv = argv[1:] } } if 0 < len(argv) { argv = argv[1:] } port, err := net.ResolveTCPAddr("tcp",local); if err != nil { fmt.Printf("--En- S: Address error: %s (%s)\n",local,err) return } fmt.Printf(Elapsed(Start)+"--In- S: Listening at %s...\n",local); sconn, err := net.ListenTCP("tcp", port) if err != nil { fmt.Printf(Elapsed(Start)+"--En- S: Listen error: %s (%s)\n",local,err) return } reqbuf := make([]byte,LINESIZE) res := "" for { fmt.Printf(Elapsed(Start0)+"--In- S: Listening at %s...\n",local); aconn, err := sconn.AcceptTCP() Start = time.Now() if err != nil { fmt.Printf(Elapsed(Start)+"--En- S: Accept error: %s (%s)\n",local,err) return } clnt, _ := aconn.File() fd := clnt.Fd() ar := aconn.RemoteAddr() if debug { fmt.Printf(Elapsed(Start0)+"--In- S: Accepted TCP at %s [%d] <- %v\n", local,fd,ar) } res = fmt.Sprintf("220 GShell/%s Server\r\n",VERSION) fmt.Fprintf(clnt,"%s",res) if debug { fmt.Printf(Elapsed(Start)+"--In- S: %s",res) } count, err := clnt.Read(reqbuf) if err != nil { fmt.Printf(Elapsed(Start)+"--En- C: (%v %v) %v", count,err,string(reqbuf)) } req := string(reqbuf[:count]) if debug { fmt.Printf(Elapsed(Start)+"--In- C: %v",string(req)) } reqv := strings.Split(string(req),"\r") cmdv := gshScanArg(reqv[0],0) //cmdv := strings.Split(reqv[0]," ") switch cmdv[0] { case "HELO": res = fmt.Sprintf("250 %v",req) case "GET": // download {remotefile|-zN} [localfile] var dsize int64 = 32*1024*1024 var bsize int = 64*1024 var fname string = "" var in *os.File = nil var pseudoEOF = false if 1 < len(cmdv) { fname = cmdv[1] if strBegins(fname,"-z") { fmt.Sscanf(fname[2:],"%d",&dsize) }else if strBegins(fname,"{") { xin,xout,err := gsh.Popen(fname,"r") if err { }else{ xout.Close() defer xin.Close() in = xin dsize = MaxStreamSize pseudoEOF = true } }else{ xin,err := os.Open(fname) if err != nil { fmt.Printf("--En- GET (%v)\n",err) }else{ defer xin.Close() in = xin fi,_ := xin.Stat() dsize = fi.Size() } } } //fmt.Printf(Elapsed(Start)+"--In- GET %v:%v\n",dsize,bsize) res = fmt.Sprintf("200 %v\r\n",dsize) fmt.Fprintf(clnt,"%v",res) tcpPush(clnt); // should be separated as line in receiver fmt.Printf(Elapsed(Start)+"--In- S: %v",res) wcount := fileRelay("SendGET",in,clnt,dsize,bsize) if pseudoEOF { in.Close() // pipe from the command // show end of stream data (its size) by OOB? SoftEOF := fmt.Sprintf("((SoftEOF %v))",wcount) fmt.Printf(Elapsed(Start)+"--In- S: Send %v\n",SoftEOF) tcpPush(clnt); // to let SoftEOF data apper at the top of recevied data fmt.Fprintf(clnt,"%v\r\n",SoftEOF) tcpPush(clnt); // to let SoftEOF alone in a packet (separate with 200 OK) // with client generated random? //fmt.Printf("--In- L: close %v (%v)\n",in.Fd(),in.Name()) } res = fmt.Sprintf("200 GET done\r\n") case "PUT": // upload {srcfile|-zN} [dstfile] var dsize int64 = 32*1024*1024 var bsize int = 64*1024 var fname string = "" var out *os.File = nil if 1 < len(cmdv) { // localfile fmt.Sscanf(cmdv[1],"%d",&dsize) } if 2 < len(cmdv) { fname = cmdv[2] if fname == "-" { // nul dev }else if strBegins(fname,"{") { xin,xout,err := gsh.Popen(fname,"w") if err { }else{ xin.Close() defer xout.Close() out = xout } }else{ // should write to temporary file // should suppress ^C on tty xout,err := os.OpenFile(fname,os.O_CREATE|os.O_RDWR|os.O_TRUNC,0600) //fmt.Printf("--In- S: open(%v) out(%v) err(%v)\n",fname,xout,err) if err != nil { fmt.Printf("--En- PUT (%v)\n",err) }else{ out = xout } } fmt.Printf(Elapsed(Start)+"--In- L: open(%v,w) %v (%v)\n", fname,local,err) } fmt.Printf(Elapsed(Start)+"--In- PUT %v (/%v)\n",dsize,bsize) fmt.Printf(Elapsed(Start)+"--In- S: 200 %v OK\r\n",dsize) fmt.Fprintf(clnt,"200 %v OK\r\n",dsize) fileRelay("RecvPUT",clnt,out,dsize,bsize) res = fmt.Sprintf("200 PUT done\r\n") default: res = fmt.Sprintf("400 What? %v",req) } swcc,serr := clnt.Write([]byte(res)) if serr != nil { fmt.Printf(Elapsed(Start)+"--In- S: (wc=%v er=%v) %v",swcc,serr,res) }else{ fmt.Printf(Elapsed(Start)+"--In- S: %v",res) } aconn.Close(); clnt.Close(); } sconn.Close(); } func (gsh*GshContext)RexecClient(argv[]string)(int,string){ debug := true Start := time.Now() if len(argv) == 1 { return -1,"EmptyARG" } argv = argv[1:] if argv[0] == "-serv" { gsh.RexecServer(argv[1:]) return 0,"Server" } remote := "0.0.0.0:9999" if argv[0][0] == '@' { remote = argv[0][1:] argv = argv[1:] } if argv[0] == "-s" { debug = false argv = argv[1:] } dport, err := net.ResolveTCPAddr("tcp",remote); if err != nil { fmt.Printf(Elapsed(Start)+"Address error: %s (%s)\n",remote,err) return -1,"AddressError" } fmt.Printf(Elapsed(Start)+"--In- C: Connecting to %s\n",remote) serv, err := net.DialTCP("tcp",nil,dport) if err != nil { fmt.Printf(Elapsed(Start)+"Connection error: %s (%s)\n",remote,err) return -1,"CannotConnect" } if debug { al := serv.LocalAddr() fmt.Printf(Elapsed(Start)+"--In- C: Connected to %v <- %v\n",remote,al) } req := "" res := make([]byte,LINESIZE) count,err := serv.Read(res) if err != nil { fmt.Printf("--En- S: (%3d,%v) %v",count,err,string(res)) } if debug { fmt.Printf(Elapsed(Start)+"--In- S: %v",string(res)) } if argv[0] == "GET" { savPA := gsh.gshPA var bsize int = 64*1024 req = fmt.Sprintf("%v\r\n",strings.Join(argv," ")) fmt.Printf(Elapsed(Start)+"--In- C: %v",req) fmt.Fprintf(serv,req) count,err = serv.Read(res) if err != nil { }else{ var dsize int64 = 0 var out *os.File = nil var out_tobeclosed *os.File = nil var fname string = "" var rcode int = 0 var pid int = -1 fmt.Sscanf(string(res),"%d %d",&rcode,&dsize) fmt.Printf(Elapsed(Start)+"--In- S: %v",string(res[0:count])) if 3 <= len(argv) { fname = argv[2] if strBegins(fname,"{") { xin,xout,err := gsh.Popen(fname,"w") if err { }else{ xin.Close() defer xout.Close() out = xout out_tobeclosed = xout pid = 0 // should be its pid } }else{ // should write to temporary file // should suppress ^C on tty xout,err := os.OpenFile(fname,os.O_CREATE|os.O_RDWR|os.O_TRUNC,0600) if err != nil { fmt.Print("--En- %v\n",err) } out = xout //fmt.Printf("--In-- %d > %s\n",out.Fd(),fname) } } in,_ := serv.File() fileRelay("RecvGET",in,out,dsize,bsize) if 0 <= pid { gsh.gshPA = savPA // recovery of Fd(), and more? fmt.Printf(Elapsed(Start)+"--In- L: close Pipe > %v\n",fname) out_tobeclosed.Close() //syscall.Wait4(pid,nil,0,nil) //@@ } } }else if argv[0] == "PUT" { remote, _ := serv.File() var local *os.File = nil var dsize int64 = 32*1024*1024 var bsize int = 64*1024 var ofile string = "-" //fmt.Printf("--I-- Rex %v\n",argv) if 1 < len(argv) { fname := argv[1] if strBegins(fname,"-z") { fmt.Sscanf(fname[2:],"%d",&dsize) }else if strBegins(fname,"{") { xin,xout,err := gsh.Popen(fname,"r") if err { }else{ xout.Close() defer xin.Close() //in = xin local = xin fmt.Printf("--In- [%d] < Upload output of %v\n", local.Fd(),fname) ofile = "-from."+fname dsize = MaxStreamSize } }else{ xlocal,err := os.Open(fname) if err != nil { fmt.Printf("--En- (%s)\n",err) local = nil }else{ local = xlocal fi,_ := local.Stat() dsize = fi.Size() defer local.Close() //fmt.Printf("--I-- Rex in(%v / %v)\n",ofile,dsize) } ofile = fname fmt.Printf(Elapsed(Start)+"--In- L: open(%v,r)=%v %v (%v)\n", fname,dsize,local,err) } } if 2 < len(argv) && argv[2] != "" { ofile = argv[2] //fmt.Printf("(%d)%v B.ofile=%v\n",len(argv),argv,ofile) } //fmt.Printf(Elapsed(Start)+"--I-- Rex out(%v)\n",ofile) fmt.Printf(Elapsed(Start)+"--In- PUT %v (/%v)\n",dsize,bsize) req = fmt.Sprintf("PUT %v %v \r\n",dsize,ofile) if debug { fmt.Printf(Elapsed(Start)+"--In- C: %v",req) } fmt.Fprintf(serv,"%v",req) count,err = serv.Read(res) if debug { fmt.Printf(Elapsed(Start)+"--In- S: %v",string(res[0:count])) } fileRelay("SendPUT",local,remote,dsize,bsize) }else{ req = fmt.Sprintf("%v\r\n",strings.Join(argv," ")) if debug { fmt.Printf(Elapsed(Start)+"--In- C: %v",req) } fmt.Fprintf(serv,"%v",req) //fmt.Printf("--In- sending RexRequest(%v)\n",len(req)) } //fmt.Printf(Elapsed(Start)+"--In- waiting RexResponse...\n") count,err = serv.Read(res) ress := "" if count == 0 { ress = "(nil)\r\n" }else{ ress = string(res[:count]) } if err != nil { fmt.Printf(Elapsed(Start)+"--En- S: (%d,%v) %v",count,err,ress) }else{ fmt.Printf(Elapsed(Start)+"--In- S: %v",ress) } serv.Close() //conn.Close() var stat string var rcode int fmt.Sscanf(ress,"%d %s",&rcode,&stat) //fmt.Printf("--D-- Client: %v (%v)",rcode,stat) return rcode,ress } // Remote Shell // gcp file [...] { [host]:[port:][dir] | dir } // -p | -no-p func (gsh*GshContext)FileCopy(argv[]string){ var host = "" var port = "" var upload = false var download = false var xargv = []string{"rex-gcp"} var srcv = []string{} var dstv = []string{} argv = argv[1:] for _,v := range argv { /* if v[0] == '-' { // might be a pseudo file (generated date) continue } */ obj := strings.Split(v,":") //fmt.Printf("%d %v %v\n",len(obj),v,obj) if 1 < len(obj) { host = obj[0] file := "" if 0 < len(host) { gsh.LastServer.host = host }else{ host = gsh.LastServer.host port = gsh.LastServer.port } if 2 < len(obj) { port = obj[1] if 0 < len(port) { gsh.LastServer.port = port }else{ port = gsh.LastServer.port } file = obj[2] }else{ file = obj[1] } if len(srcv) == 0 { download = true srcv = append(srcv,file) continue } upload = true dstv = append(dstv,file) continue } /* idx := strings.Index(v,":") if 0 <= idx { remote = v[0:idx] if len(srcv) == 0 { download = true srcv = append(srcv,v[idx+1:]) continue } upload = true dstv = append(dstv,v[idx+1:]) continue } */ if download { dstv = append(dstv,v) }else{ srcv = append(srcv,v) } } hostport := "@" + host + ":" + port if upload { if host != "" { xargv = append(xargv,hostport) } xargv = append(xargv,"PUT") xargv = append(xargv,srcv[0:]...) xargv = append(xargv,dstv[0:]...) //fmt.Printf("--I-- FileCopy PUT gsh://%s/%v < %v // %v\n",hostport,dstv,srcv,xargv) fmt.Printf("--I-- FileCopy PUT gsh://%s/%v < %v\n",hostport,dstv,srcv) gsh.RexecClient(xargv) }else if download { if host != "" { xargv = append(xargv,hostport) } xargv = append(xargv,"GET") xargv = append(xargv,srcv[0:]...) xargv = append(xargv,dstv[0:]...) //fmt.Printf("--I-- FileCopy GET gsh://%v/%v > %v // %v\n",hostport,srcv,dstv,xargv) fmt.Printf("--I-- FileCopy GET gsh://%v/%v > %v\n",hostport,srcv,dstv) gsh.RexecClient(xargv) }else{ } } // target func (gsh*GshContext)Trelpath(rloc string)(string){ cwd, _ := os.Getwd() os.Chdir(gsh.RWD) os.Chdir(rloc) twd, _ := os.Getwd() os.Chdir(cwd) tpath := twd + "/" + rloc return tpath } // join to rmote GShell - [user@]host[:port] or cd host:[port]:path func (gsh*GshContext)Rjoin(argv[]string){ if len(argv) <= 1 { fmt.Printf("--I-- current server = %v\n",gsh.RSERV) return } serv := argv[1] servv := strings.Split(serv,":") if 1 <= len(servv) { if servv[0] == "lo" { servv[0] = "localhost" } } switch len(servv) { case 1: //if strings.Index(serv,":") < 0 { serv = servv[0] + ":" + fmt.Sprintf("%d",GSH_PORT) //} case 2: // host:port serv = strings.Join(servv,":") } xargv := []string{"rex-join","@"+serv,"HELO"} rcode,stat := gsh.RexecClient(xargv) if (rcode / 100) == 2 { fmt.Printf("--I-- OK Joined (%v) %v\n",rcode,stat) gsh.RSERV = serv }else{ fmt.Printf("--I-- NG, could not joined (%v) %v\n",rcode,stat) } } func (gsh*GshContext)Rexec(argv[]string){ if len(argv) <= 1 { fmt.Printf("--I-- rexec command [ | {file || {command} ]\n",gsh.RSERV) return } /* nargv := gshScanArg(strings.Join(argv," "),0) fmt.Printf("--D-- nargc=%d [%v]\n",len(nargv),nargv) if nargv[1][0] != '{' { nargv[1] = "{" + nargv[1] + "}" fmt.Printf("--D-- nargc=%d [%v]\n",len(nargv),nargv) } argv = nargv */ nargv := []string{} nargv = append(nargv,"{"+strings.Join(argv[1:]," ")+"}") fmt.Printf("--D-- nargc=%d %v\n",len(nargv),nargv) argv = nargv xargv := []string{"rex-exec","@"+gsh.RSERV,"GET"} xargv = append(xargv,argv...) xargv = append(xargv,"/dev/tty") rcode,stat := gsh.RexecClient(xargv) if (rcode / 100) == 2 { fmt.Printf("--I-- OK Rexec (%v) %v\n",rcode,stat) }else{ fmt.Printf("--I-- NG Rexec (%v) %v\n",rcode,stat) } } func (gsh*GshContext)Rchdir(argv[]string){ if len(argv) <= 1 { return } cwd, _ := os.Getwd() os.Chdir(gsh.RWD) os.Chdir(argv[1]) twd, _ := os.Getwd() gsh.RWD = twd fmt.Printf("--I-- JWD=%v\n",twd) os.Chdir(cwd) } func (gsh*GshContext)Rpwd(argv[]string){ fmt.Printf("%v\n",gsh.RWD) } func (gsh*GshContext)Rls(argv[]string){ cwd, _ := os.Getwd() os.Chdir(gsh.RWD) argv[0] = "-ls" gsh.xFind(argv) os.Chdir(cwd) } func (gsh*GshContext)Rput(argv[]string){ var local string = "" var remote string = "" if 1 < len(argv) { local = argv[1] remote = local // base name } if 2 < len(argv) { remote = argv[2] } fmt.Printf("--I-- jput from=%v to=%v\n",local,gsh.Trelpath(remote)) } func (gsh*GshContext)Rget(argv[]string){ var remote string = "" var local string = "" if 1 < len(argv) { remote = argv[1] local = remote // base name } if 2 < len(argv) { local = argv[2] } fmt.Printf("--I-- jget from=%v to=%v\n",gsh.Trelpath(remote),local) } // network // -s, -si, -so // bi-directional, source, sync (maybe socket) func (gshCtx*GshContext)sconnect(inTCP bool, argv []string) { gshPA := gshCtx.gshPA if len(argv) < 2 { fmt.Printf("Usage: -s [host]:[port[.udp]]\n") return } remote := argv[1] if remote == ":" { remote = "0.0.0.0:9999" } if inTCP { // TCP dport, err := net.ResolveTCPAddr("tcp",remote); if err != nil { fmt.Printf("Address error: %s (%s)\n",remote,err) return } conn, err := net.DialTCP("tcp",nil,dport) if err != nil { fmt.Printf("Connection error: %s (%s)\n",remote,err) return } file, _ := conn.File(); fd := file.Fd() fmt.Printf("Socket: connected to %s, socket[%d]\n",remote,fd) savfd := gshPA.Files[1] gshPA.Files[1] = fd; gshCtx.gshellv(argv[2:]) gshPA.Files[1] = savfd file.Close() conn.Close() }else{ //dport, err := net.ResolveUDPAddr("udp4",remote); dport, err := net.ResolveUDPAddr("udp",remote); if err != nil { fmt.Printf("Address error: %s (%s)\n",remote,err) return } //conn, err := net.DialUDP("udp4",nil,dport) conn, err := net.DialUDP("udp",nil,dport) if err != nil { fmt.Printf("Connection error: %s (%s)\n",remote,err) return } file, _ := conn.File(); fd := file.Fd() ar := conn.RemoteAddr() //al := conn.LocalAddr() fmt.Printf("Socket: connected to %s [%s], socket[%d]\n", remote,ar.String(),fd) savfd := gshPA.Files[1] gshPA.Files[1] = fd; gshCtx.gshellv(argv[2:]) gshPA.Files[1] = savfd file.Close() conn.Close() } } func (gshCtx*GshContext)saccept(inTCP bool, argv []string) { gshPA := gshCtx.gshPA if len(argv) < 2 { fmt.Printf("Usage: -ac [host]:[port[.udp]]\n") return } local := argv[1] if local == ":" { local = "0.0.0.0:9999" } if inTCP { // TCP port, err := net.ResolveTCPAddr("tcp",local); if err != nil { fmt.Printf("Address error: %s (%s)\n",local,err) return } //fmt.Printf("Listen at %s...\n",local); sconn, err := net.ListenTCP("tcp", port) if err != nil { fmt.Printf("Listen error: %s (%s)\n",local,err) return } //fmt.Printf("Accepting at %s...\n",local); aconn, err := sconn.AcceptTCP() if err != nil { fmt.Printf("Accept error: %s (%s)\n",local,err) return } file, _ := aconn.File() fd := file.Fd() fmt.Printf("Accepted TCP at %s [%d]\n",local,fd) savfd := gshPA.Files[0] gshPA.Files[0] = fd; gshCtx.gshellv(argv[2:]) gshPA.Files[0] = savfd sconn.Close(); aconn.Close(); file.Close(); }else{ //port, err := net.ResolveUDPAddr("udp4",local); port, err := net.ResolveUDPAddr("udp",local); if err != nil { fmt.Printf("Address error: %s (%s)\n",local,err) return } fmt.Printf("Listen UDP at %s...\n",local); //uconn, err := net.ListenUDP("udp4", port) uconn, err := net.ListenUDP("udp", port) if err != nil { fmt.Printf("Listen error: %s (%s)\n",local,err) return } file, _ := uconn.File() fd := file.Fd() ar := uconn.RemoteAddr() remote := "" if ar != nil { remote = ar.String() } if remote == "" { remote = "?" } // not yet received //fmt.Printf("Accepted at %s [%d] <- %s\n",local,fd,"") savfd := gshPA.Files[0] gshPA.Files[0] = fd; savenv := gshPA.Env gshPA.Env = append(savenv, "REMOTE_HOST="+remote) gshCtx.gshellv(argv[2:]) gshPA.Env = savenv gshPA.Files[0] = savfd uconn.Close(); file.Close(); } } // empty line command func (gshCtx*GshContext)xPwd(argv[]string){ // execute context command, pwd + date // context notation, representation scheme, to be resumed at re-login cwd, _ := os.Getwd() switch { case isin("-a",argv): gshCtx.ShowChdirHistory(argv) case isin("-ls",argv): showFileInfo(cwd,argv) default: fmt.Printf("%s\n",cwd) case isin("-v",argv): // obsolete emtpy command t := time.Now() date := t.Format(time.UnixDate) exe, _ := os.Executable() host, _ := os.Hostname() fmt.Printf("{PWD=\"%s\"",cwd) fmt.Printf(" HOST=\"%s\"",host) fmt.Printf(" DATE=\"%s\"",date) fmt.Printf(" TIME=\"%s\"",t.String()) fmt.Printf(" PID=\"%d\"",os.Getpid()) fmt.Printf(" EXE=\"%s\"",exe) fmt.Printf("}\n") } } // History // these should be browsed and edited by HTTP browser // show the time of command with -t and direcotry with -ls // openfile-history, sort by -a -m -c // sort by elapsed time by -t -s // search by "more" like interface // edit history // sort history, and wc or uniq // CPU and other resource consumptions // limit showing range (by time or so) // export / import history func (gshCtx *GshContext)xHistory(argv []string){ atWorkDirX := -1 if 1 < len(argv) && strBegins(argv[1],"@") { atWorkDirX,_ = strconv.Atoi(argv[1][1:]) } //fmt.Printf("--D-- showHistory(%v)\n",argv) for i, v := range gshCtx.CommandHistory { // exclude commands not to be listed by default // internal commands may be suppressed by default if v.CmdLine == "" && !isin("-a",argv) { continue; } if 0 <= atWorkDirX { if v.WorkDirX != atWorkDirX { continue } } if !isin("-n",argv){ // like "fc" fmt.Printf("!%-2d ",i) } if isin("-v",argv){ fmt.Println(v) // should be with it date }else{ if isin("-l",argv) || isin("-l0",argv) { elps := v.EndAt.Sub(v.StartAt); start := v.StartAt.Format(time.Stamp) fmt.Printf("@%d ",v.WorkDirX) fmt.Printf("[%v] %11v/t ",start,elps) } if isin("-l",argv) && !isin("-l0",argv){ fmt.Printf("%v",Rusagef("%t %u\t// %s",argv,v.Rusagev)) } if isin("-at",argv) { // isin("-ls",argv){ dhi := v.WorkDirX // workdir history index fmt.Printf("@%d %s\t",dhi,v.WorkDir) // show the FileInfo of the output command?? } fmt.Printf("%s",v.CmdLine) fmt.Printf("\n") } } } // !n - history index func searchHistory(gshCtx GshContext, gline string) (string, bool, bool){ if gline[0] == '!' { hix, err := strconv.Atoi(gline[1:]) if err != nil { fmt.Printf("--E-- (%s : range)\n",hix) return "", false, true } if hix < 0 || len(gshCtx.CommandHistory) <= hix { fmt.Printf("--E-- (%d : out of range)\n",hix) return "", false, true } return gshCtx.CommandHistory[hix].CmdLine, false, false } // search //for i, v := range gshCtx.CommandHistory { //} return gline, false, false } func (gsh*GshContext)cmdStringInHistory(hix int)(cmd string, ok bool){ if 0 <= hix && hix < len(gsh.CommandHistory) { return gsh.CommandHistory[hix].CmdLine,true } return "",false } // temporary adding to PATH environment // cd name -lib for LD_LIBRARY_PATH // chdir with directory history (date + full-path) // -s for sort option (by visit date or so) func (gsh*GshContext)ShowChdirHistory1(i int,v GChdirHistory, argv []string){ fmt.Printf("!%-2d ",v.CmdIndex) // the first command at this WorkDir fmt.Printf("@%d ",i) fmt.Printf("[%v] ",v.MovedAt.Format(time.Stamp)) showFileInfo(v.Dir,argv) } func (gsh*GshContext)ShowChdirHistory(argv []string){ for i, v := range gsh.ChdirHistory { gsh.ShowChdirHistory1(i,v,argv) } } func skipOpts(argv[]string)(int){ for i,v := range argv { if strBegins(v,"-") { }else{ return i } } return -1 } func (gshCtx*GshContext)xChdir(argv []string){ cdhist := gshCtx.ChdirHistory if isin("?",argv ) || isin("-t",argv) || isin("-a",argv) { gshCtx.ShowChdirHistory(argv) return } pwd, _ := os.Getwd() dir := "" if len(argv) <= 1 { dir = toFullpath("~") }else{ i := skipOpts(argv[1:]) if i < 0 { dir = toFullpath("~") }else{ dir = argv[1+i] } } if strBegins(dir,"@") { if dir == "@0" { // obsolete dir = gshCtx.StartDir }else if dir == "@!" { index := len(cdhist) - 1 if 0 < index { index -= 1 } dir = cdhist[index].Dir }else{ index, err := strconv.Atoi(dir[1:]) if err != nil { fmt.Printf("--E-- xChdir(%v)\n",err) dir = "?" }else if len(gshCtx.ChdirHistory) <= index { fmt.Printf("--E-- xChdir(history range error)\n") dir = "?" }else{ dir = cdhist[index].Dir } } } if dir != "?" { err := os.Chdir(dir) if err != nil { fmt.Printf("--E-- xChdir(%s)(%v)\n",argv[1],err) }else{ cwd, _ := os.Getwd() if cwd != pwd { hist1 := GChdirHistory { } hist1.Dir = cwd hist1.MovedAt = time.Now() hist1.CmdIndex = len(gshCtx.CommandHistory)+1 gshCtx.ChdirHistory = append(cdhist,hist1) if !isin("-s",argv){ //cwd, _ := os.Getwd() //fmt.Printf("%s\n",cwd) ix := len(gshCtx.ChdirHistory)-1 gshCtx.ShowChdirHistory1(ix,hist1,argv) } } } } if isin("-ls",argv){ cwd, _ := os.Getwd() showFileInfo(cwd,argv); } } func TimeValSub(tv1 *syscall.Timeval, tv2 *syscall.Timeval){ *tv1 = syscall.NsecToTimeval(tv1.Nano() - tv2.Nano()) } func RusageSubv(ru1, ru2 [2]syscall.Rusage)([2]syscall.Rusage){ TimeValSub(&ru1[0].Utime,&ru2[0].Utime) TimeValSub(&ru1[0].Stime,&ru2[0].Stime) TimeValSub(&ru1[1].Utime,&ru2[1].Utime) TimeValSub(&ru1[1].Stime,&ru2[1].Stime) return ru1 } func TimeValAdd(tv1 syscall.Timeval, tv2 syscall.Timeval)(syscall.Timeval){ tvs := syscall.NsecToTimeval(tv1.Nano() + tv2.Nano()) return tvs } /* func RusageAddv(ru1, ru2 [2]syscall.Rusage)([2]syscall.Rusage){ TimeValAdd(ru1[0].Utime,ru2[0].Utime) TimeValAdd(ru1[0].Stime,ru2[0].Stime) TimeValAdd(ru1[1].Utime,ru2[1].Utime) TimeValAdd(ru1[1].Stime,ru2[1].Stime) return ru1 } */ // Resource Usage func sRusagef(fmtspec string, argv []string, ru [2]syscall.Rusage)(string){ // ru[0] self , ru[1] children ut := TimeValAdd(ru[0].Utime,ru[1].Utime) st := TimeValAdd(ru[0].Stime,ru[1].Stime) uu := (ut.Sec*1000000 + int64(ut.Usec)) * 1000 su := (st.Sec*1000000 + int64(st.Usec)) * 1000 tu := uu + su ret := fmt.Sprintf("%v/sum",abbtime(tu)) ret += fmt.Sprintf(", %v/usr",abbtime(uu)) ret += fmt.Sprintf(", %v/sys",abbtime(su)) return ret } func Rusagef(fmtspec string, argv []string, ru [2]syscall.Rusage)(string){ ut := TimeValAdd(ru[0].Utime,ru[1].Utime) st := TimeValAdd(ru[0].Stime,ru[1].Stime) fmt.Printf("%d.%06ds/u ",ut.Sec,ut.Usec) //ru[1].Utime.Sec,ru[1].Utime.Usec) fmt.Printf("%d.%06ds/s ",st.Sec,st.Usec) //ru[1].Stime.Sec,ru[1].Stime.Usec) return "" } func Getrusagev()([2]syscall.Rusage){ var ruv = [2]syscall.Rusage{} syscall.Getrusage(syscall.RUSAGE_SELF,&ruv[0]) syscall.Getrusage(syscall.RUSAGE_CHILDREN,&ruv[1]) return ruv } func showRusage(what string,argv []string, ru *syscall.Rusage){ fmt.Printf("%s: ",what); fmt.Printf("Usr=%d.%06ds",ru.Utime.Sec,ru.Utime.Usec) fmt.Printf(" Sys=%d.%06ds",ru.Stime.Sec,ru.Stime.Usec) fmt.Printf(" Rss=%vB",ru.Maxrss) if isin("-l",argv) { fmt.Printf(" MinFlt=%v",ru.Minflt) fmt.Printf(" MajFlt=%v",ru.Majflt) fmt.Printf(" IxRSS=%vB",ru.Ixrss) fmt.Printf(" IdRSS=%vB",ru.Idrss) fmt.Printf(" Nswap=%vB",ru.Nswap) fmt.Printf(" Read=%v",ru.Inblock) fmt.Printf(" Write=%v",ru.Oublock) } fmt.Printf(" Snd=%v",ru.Msgsnd) fmt.Printf(" Rcv=%v",ru.Msgrcv) //if isin("-l",argv) { fmt.Printf(" Sig=%v",ru.Nsignals) //} fmt.Printf("\n"); } func (gshCtx *GshContext)xTime(argv[]string)(bool){ if 2 <= len(argv){ gshCtx.LastRusage = syscall.Rusage{} rusagev1 := Getrusagev() fin := gshCtx.gshellv(argv[1:]) rusagev2 := Getrusagev() showRusage(argv[1],argv,&gshCtx.LastRusage) rusagev := RusageSubv(rusagev2,rusagev1) showRusage("self",argv,&rusagev[0]) showRusage("chld",argv,&rusagev[1]) return fin }else{ rusage:= syscall.Rusage {} syscall.Getrusage(syscall.RUSAGE_SELF,&rusage) showRusage("self",argv, &rusage) syscall.Getrusage(syscall.RUSAGE_CHILDREN,&rusage) showRusage("chld",argv, &rusage) return false } } func (gshCtx *GshContext)xJobs(argv[]string){ fmt.Printf("%d Jobs\n",len(gshCtx.BackGroundJobs)) for ji, pid := range gshCtx.BackGroundJobs { //wstat := syscall.WaitStatus {0} rusage := syscall.Rusage {} //wpid, err := syscall.Wait4(pid,&wstat,syscall.WNOHANG,&rusage); wpid, err := syscall.Wait4(pid,nil,syscall.WNOHANG,&rusage); if err != nil { fmt.Printf("--E-- %%%d [%d] (%v)\n",ji,pid,err) }else{ fmt.Printf("%%%d[%d](%d)\n",ji,pid,wpid) showRusage("chld",argv,&rusage) } } } func (gsh*GshContext)inBackground(argv[]string)(bool){ if gsh.CmdTrace { fmt.Printf("--I-- inBackground(%v)\n",argv) } gsh.BackGround = true // set background option xfin := false xfin = gsh.gshellv(argv) gsh.BackGround = false return xfin } // -o file without command means just opening it and refer by #N // should be listed by "files" comnmand func (gshCtx*GshContext)xOpen(argv[]string){ var pv = []int{-1,-1} err := syscall.Pipe(pv) fmt.Printf("--I-- pipe()=[#%d,#%d](%v)\n",pv[0],pv[1],err) } func (gshCtx*GshContext)fromPipe(argv[]string){ } func (gshCtx*GshContext)xClose(argv[]string){ } // redirect func (gshCtx*GshContext)redirect(argv[]string)(bool){ if len(argv) < 2 { return false } cmd := argv[0] fname := argv[1] var file *os.File = nil fdix := 0 mode := os.O_RDONLY switch { case cmd == "-i" || cmd == "<": fdix = 0 mode = os.O_RDONLY case cmd == "-o" || cmd == ">": fdix = 1 mode = os.O_RDWR | os.O_CREATE case cmd == "-a" || cmd == ">>": fdix = 1 mode = os.O_RDWR | os.O_CREATE | os.O_APPEND } if fname[0] == '#' { fd, err := strconv.Atoi(fname[1:]) if err != nil { fmt.Printf("--E-- (%v)\n",err) return false } file = os.NewFile(uintptr(fd),"MaybePipe") }else{ xfile, err := os.OpenFile(argv[1], mode, 0600) if err != nil { fmt.Printf("--E-- (%s)\n",err) return false } file = xfile } gshPA := gshCtx.gshPA savfd := gshPA.Files[fdix] gshPA.Files[fdix] = file.Fd() fmt.Printf("--I-- Opened [%d] %s\n",file.Fd(),argv[1]) gshCtx.gshellv(argv[2:]) gshPA.Files[fdix] = savfd return false } //fmt.Fprintf(res, "GShell Status: %q", html.EscapeString(req.URL.Path)) func httpHandler(res http.ResponseWriter, req *http.Request){ path := req.URL.Path fmt.Printf("--I-- Got HTTP Request(%s)\n",path) { gshCtxBuf, _ := setupGshContext() gshCtx := &gshCtxBuf fmt.Printf("--I-- %s\n",path[1:]) gshCtx.tgshelll(path[1:]) } fmt.Fprintf(res, "Hello(^-^)/\n%s\n",path) } func (gshCtx *GshContext) httpServer(argv []string){ http.HandleFunc("/", httpHandler) accport := "localhost:9999" fmt.Printf("--I-- HTTP Server Start at [%s]\n",accport) http.ListenAndServe(accport,nil) } func (gshCtx *GshContext)xGo(argv[]string){ go gshCtx.gshellv(argv[1:]); } func (gshCtx *GshContext) xPs(argv[]string)(){ } // Plugin // plugin [-ls [names]] to list plugins // Reference: plugin source code func (gshCtx *GshContext) whichPlugin(name string,argv[]string)(pi *PluginInfo){ pi = nil for _,p := range gshCtx.PluginFuncs { if p.Name == name && pi == nil { pi = &p } if !isin("-s",argv){ //fmt.Printf("%v %v ",i,p) if isin("-ls",argv){ showFileInfo(p.Path,argv) }else{ fmt.Printf("%s\n",p.Name) } } } return pi } func (gshCtx *GshContext) xPlugin(argv[]string) (error) { if len(argv) == 0 || argv[0] == "-ls" { gshCtx.whichPlugin("",argv) return nil } name := argv[0] Pin := gshCtx.whichPlugin(name,[]string{"-s"}) if Pin != nil { os.Args = argv // should be recovered? Pin.Addr.(func())() return nil } sofile := toFullpath(argv[0] + ".so") // or find it by which($PATH) p, err := plugin.Open(sofile) if err != nil { fmt.Printf("--E-- plugin.Open(%s)(%v)\n",sofile,err) return err } fname := "Main" f, err := p.Lookup(fname) if( err != nil ){ fmt.Printf("--E-- plugin.Lookup(%s)(%v)\n",fname,err) return err } pin := PluginInfo {p,f,name,sofile} gshCtx.PluginFuncs = append(gshCtx.PluginFuncs,pin) fmt.Printf("--I-- added (%d)\n",len(gshCtx.PluginFuncs)) //fmt.Printf("--I-- first call(%s:%s)%v\n",sofile,fname,argv) os.Args = argv f.(func())() return err } func (gshCtx*GshContext)Args(argv[]string){ for i,v := range os.Args { fmt.Printf("[%v] %v\n",i,v) } } func (gshCtx *GshContext) showVersion(argv[]string){ if isin("-l",argv) { fmt.Printf("%v/%v (%v)",NAME,VERSION,DATE); }else{ fmt.Printf("%v",VERSION); } if isin("-a",argv) { fmt.Printf(" %s",AUTHOR) } if !isin("-n",argv) { fmt.Printf("\n") } } // Scanf // string decomposer // scanf [format] [input] func scanv(sstr string)(strv[]string){ strv = strings.Split(sstr," ") return strv } func scanUntil(src,end string)(rstr string,leng int){ idx := strings.Index(src,end) if 0 <= idx { rstr = src[0:idx] return rstr,idx+len(end) } return src,0 } // -bn -- display base-name part only // can be in some %fmt, for sed rewriting func (gsh*GshContext)printVal(fmts string, vstr string, optv[]string){ //vint,err := strconv.Atoi(vstr) var ival int64 = 0 n := 0 err := error(nil) if strBegins(vstr,"_") { vx,_ := strconv.Atoi(vstr[1:]) if vx < len(gsh.iValues) { vstr = gsh.iValues[vx] }else{ } } // should use Eval() if strBegins(vstr,"0x") { n,err = fmt.Sscanf(vstr[2:],"%x",&ival) }else{ n,err = fmt.Sscanf(vstr,"%d",&ival) //fmt.Printf("--D-- n=%d err=(%v) {%s}=%v\n",n,err,vstr, ival) } if n == 1 && err == nil { //fmt.Printf("--D-- formatn(%v) ival(%v)\n",fmts,ival) fmt.Printf("%"+fmts,ival) }else{ if isin("-bn",optv){ fmt.Printf("%"+fmts,filepath.Base(vstr)) }else{ fmt.Printf("%"+fmts,vstr) } } } func (gsh*GshContext)printfv(fmts,div string,argv[]string,optv[]string,list[]string){ //fmt.Printf("{%d}",len(list)) //curfmt := "v" outlen := 0 curfmt := gsh.iFormat if 0 < len(fmts) { for xi := 0; xi < len(fmts); xi++ { fch := fmts[xi] if fch == '%' { if xi+1 < len(fmts) { curfmt = string(fmts[xi+1]) gsh.iFormat = curfmt xi += 1 if xi+1 < len(fmts) && fmts[xi+1] == '(' { vals,leng := scanUntil(fmts[xi+2:],")") //fmt.Printf("--D-- show fmt(%v) val(%v) next(%v)\n",curfmt,vals,leng) gsh.printVal(curfmt,vals,optv) xi += 2+leng-1 outlen += 1 } continue } } if fch == '_' { hi,leng := scanInt(fmts[xi+1:]) if 0 < leng { if hi < len(gsh.iValues) { gsh.printVal(curfmt,gsh.iValues[hi],optv) outlen += 1 // should be the real length }else{ fmt.Printf("((out-range))") } xi += leng continue; } } fmt.Printf("%c",fch) outlen += 1 } }else{ //fmt.Printf("--D-- print {%s}\n") for i,v := range list { if 0 < i { fmt.Printf(div) } gsh.printVal(curfmt,v,optv) outlen += 1 } } if 0 < outlen { fmt.Printf("\n") } } func (gsh*GshContext)Scanv(argv[]string){ //fmt.Printf("--D-- Scanv(%v)\n",argv) if len(argv) == 1 { return } argv = argv[1:] fmts := "" if strBegins(argv[0],"-F") { fmts = argv[0] gsh.iDelimiter = fmts argv = argv[1:] } input := strings.Join(argv," ") if fmts == "" { // simple decomposition v := scanv(input) gsh.iValues = v //fmt.Printf("%v\n",strings.Join(v,",")) }else{ v := make([]string,8) n,err := fmt.Sscanf(input,fmts,&v[0],&v[1],&v[2],&v[3]) fmt.Printf("--D-- Scanf ->(%v) n=%d err=(%v)\n",v,n,err) gsh.iValues = v } } func (gsh*GshContext)Printv(argv[]string){ if false { //@@U fmt.Printf("%v\n",strings.Join(argv[1:]," ")) return } //fmt.Printf("--D-- Printv(%v)\n",argv) //fmt.Printf("%v\n",strings.Join(gsh.iValues,",")) div := gsh.iDelimiter fmts := "" argv = argv[1:] if 0 < len(argv) { if strBegins(argv[0],"-F") { div = argv[0][2:] argv = argv[1:] } } optv := []string{} for _,v := range argv { if strBegins(v,"-"){ optv = append(optv,v) argv = argv[1:] }else{ break; } } if 0 < len(argv) { fmts = strings.Join(argv," ") } gsh.printfv(fmts,div,argv,optv,gsh.iValues) } func (gsh*GshContext)Basename(argv[]string){ for i,v := range gsh.iValues { gsh.iValues[i] = filepath.Base(v) } } func (gsh*GshContext)Sortv(argv[]string){ sv := gsh.iValues sort.Slice(sv , func(i,j int) bool { return sv[i] < sv[j] }) } func (gsh*GshContext)Shiftv(argv[]string){ vi := len(gsh.iValues) if 0 < vi { if isin("-r",argv) { top := gsh.iValues[0] gsh.iValues = append(gsh.iValues[1:],top) }else{ gsh.iValues = gsh.iValues[1:] } } } func (gsh*GshContext)Enq(argv[]string){ } func (gsh*GshContext)Deq(argv[]string){ } func (gsh*GshContext)Push(argv[]string){ gsh.iValStack = append(gsh.iValStack,argv[1:]) fmt.Printf("depth=%d\n",len(gsh.iValStack)) } func (gsh*GshContext)Dump(argv[]string){ for i,v := range gsh.iValStack { fmt.Printf("%d %v\n",i,v) } } func (gsh*GshContext)Pop(argv[]string){ depth := len(gsh.iValStack) if 0 < depth { v := gsh.iValStack[depth-1] if isin("-cat",argv){ gsh.iValues = append(gsh.iValues,v...) }else{ gsh.iValues = v } gsh.iValStack = gsh.iValStack[0:depth-1] fmt.Printf("depth=%d %s\n",len(gsh.iValStack),gsh.iValues) }else{ fmt.Printf("depth=%d\n",depth) } } // Command Interpreter func (gshCtx*GshContext)gshellv(argv []string) (fin bool) { fin = false if gshCtx.CmdTrace { fmt.Fprintf(os.Stderr,"--I-- gshellv((%d))\n",len(argv)) } if len(argv) <= 0 { return false } xargv := []string{} for ai := 0; ai < len(argv); ai++ { xargv = append(xargv,strsubst(gshCtx,argv[ai],false)) } argv = xargv if false { for ai := 0; ai < len(argv); ai++ { fmt.Printf("[%d] %s [%d]%T\n", ai,argv[ai],len(argv[ai]),argv[ai]) } } cmd := argv[0] if gshCtx.CmdTrace { fmt.Fprintf(os.Stderr,"--I-- gshellv(%d)%v\n",len(argv),argv) } switch { // https://tour.golang.org/flowcontrol/11 case cmd == "": gshCtx.xPwd([]string{}); // emtpy command case cmd == "-x": gshCtx.CmdTrace = ! gshCtx.CmdTrace case cmd == "-xt": gshCtx.CmdTime = ! gshCtx.CmdTime case cmd == "-ot": gshCtx.sconnect(true, argv) case cmd == "-ou": gshCtx.sconnect(false, argv) case cmd == "-it": gshCtx.saccept(true , argv) case cmd == "-iu": gshCtx.saccept(false, argv) case cmd == "-i" || cmd == "<" || cmd == "-o" || cmd == ">" || cmd == "-a" || cmd == ">>" || cmd == "-s" || cmd == "><": gshCtx.redirect(argv) case cmd == "|": gshCtx.fromPipe(argv) case cmd == "args": gshCtx.Args(argv) case cmd == "bg" || cmd == "-bg": rfin := gshCtx.inBackground(argv[1:]) return rfin case cmd == "-bn": gshCtx.Basename(argv) case cmd == "call": _,_ = gshCtx.excommand(false,argv[1:]) case cmd == "cd" || cmd == "chdir": gshCtx.xChdir(argv); case cmd == "-cksum": gshCtx.xFind(argv) case cmd == "-sum": gshCtx.xFind(argv) case cmd == "close": gshCtx.xClose(argv) case cmd == "gcp": gshCtx.FileCopy(argv) case cmd == "dec" || cmd == "decode": gshCtx.Dec(argv) case cmd == "#define": case cmd == "dump": gshCtx.Dump(argv) case cmd == "echo": echo(argv,true) case cmd == "enc" || cmd == "encode": gshCtx.Enc(argv) case cmd == "env": env(argv) case cmd == "eval": xEval(argv[1:],true) case cmd == "exec": _,_ = gshCtx.excommand(true,argv[1:]) // should not return here case cmd == "exit" || cmd == "quit": // write Result code EXIT to 3> return true case cmd == "fdls": // dump the attributes of fds (of other process) case cmd == "-find" || cmd == "fin" || cmd == "ufind" || cmd == "uf": gshCtx.xFind(argv[1:]) case cmd == "fu": gshCtx.xFind(argv[1:]) case cmd == "fork": // mainly for a server case cmd == "-gen": gshCtx.gen(argv) case cmd == "-go": gshCtx.xGo(argv) case cmd == "-grep": gshCtx.xFind(argv) case cmd == "gdeq": gshCtx.Deq(argv) case cmd == "genq": gshCtx.Enq(argv) case cmd == "gpop": gshCtx.Pop(argv) case cmd == "gpush": gshCtx.Push(argv) case cmd == "history" || cmd == "hi": // hi should be alias gshCtx.xHistory(argv) case cmd == "jobs": gshCtx.xJobs(argv) case cmd == "lnsp": gshCtx.SplitLine(argv) case cmd == "-ls": gshCtx.xFind(argv) case cmd == "nop": // do nothing case cmd == "pipe": gshCtx.xOpen(argv) case cmd == "plug" || cmd == "plugin" || cmd == "pin": gshCtx.xPlugin(argv[1:]) case cmd == "print" || cmd == "-pr": // output internal slice // also sprintf should be gshCtx.Printv(argv) case cmd == "ps": gshCtx.xPs(argv) case cmd == "pstitle": // to be gsh.title case cmd == "rexecd" || cmd == "rexd": gshCtx.RexecServer(argv) case cmd == "rexec" || cmd == "rex": gshCtx.RexecClient(argv) case cmd == "repeat" || cmd == "rep": // repeat cond command gshCtx.repeat(argv) case cmd == "scan": // scan input (or so in fscanf) to internal slice (like Files or map) gshCtx.Scanv(argv) case cmd == "set": // set name ... case cmd == "serv": gshCtx.httpServer(argv) case cmd == "shift": gshCtx.Shiftv(argv) case cmd == "sleep": gshCtx.sleep(argv) case cmd == "-sort": gshCtx.Sortv(argv) case cmd == "j" || cmd == "join": gshCtx.Rjoin(argv) case cmd == "a" || cmd == "alpa": gshCtx.Rexec(argv) case cmd == "jcd" || cmd == "jchdir": gshCtx.Rchdir(argv) case cmd == "jget": gshCtx.Rget(argv) case cmd == "jls": gshCtx.Rls(argv) case cmd == "jput": gshCtx.Rput(argv) case cmd == "jpwd": gshCtx.Rpwd(argv) case cmd == "time": fin = gshCtx.xTime(argv) case cmd == "pwd": gshCtx.xPwd(argv); case cmd == "ver" || cmd == "-ver" || cmd == "version": gshCtx.showVersion(argv) case cmd == "where": // data file or so? case cmd == "which": which("PATH",argv); default: if gshCtx.whichPlugin(cmd,[]string{"-s"}) != nil { gshCtx.xPlugin(argv) }else{ notfound,_ := gshCtx.excommand(false,argv) if notfound { fmt.Printf("--E-- command not found (%v)\n",cmd) } } } return fin } func (gsh*GshContext)gshelll(gline string) (rfin bool) { argv := strings.Split(string(gline)," ") fin := gsh.gshellv(argv) return fin } func (gsh*GshContext)tgshelll(gline string)(xfin bool){ start := time.Now() fin := gsh.gshelll(gline) end := time.Now() elps := end.Sub(start); if gsh.CmdTime { fmt.Printf("--T-- " + time.Now().Format(time.Stamp) + "(%d.%09ds)\n", elps/1000000000,elps%1000000000) } return fin } func Ttyid() (int) { fi, err := os.Stdin.Stat() if err != nil { return 0; } //fmt.Printf("Stdin: %v Dev=%d\n", // fi.Mode(),fi.Mode()&os.ModeDevice) if (fi.Mode() & os.ModeDevice) != 0 { stat := syscall.Stat_t{}; err := syscall.Fstat(0,&stat) if err != nil { //fmt.Printf("--I-- Stdin: (%v)\n",err) }else{ //fmt.Printf("--I-- Stdin: rdev=%d %d\n", // stat.Rdev&0xFF,stat.Rdev); //fmt.Printf("--I-- Stdin: tty%d\n",stat.Rdev&0xFF); return int(stat.Rdev & 0xFF) } } return 0 } func (gshCtx *GshContext) ttyfile() string { //fmt.Printf("--I-- GSH_HOME=%s\n",gshCtx.GshHomeDir) ttyfile := gshCtx.GshHomeDir + "/" + "gsh-tty" + fmt.Sprintf("%02d",gshCtx.TerminalId) //strconv.Itoa(gshCtx.TerminalId) //fmt.Printf("--I-- ttyfile=%s\n",ttyfile) return ttyfile } func (gshCtx *GshContext) ttyline()(*os.File){ file, err := os.OpenFile(gshCtx.ttyfile(),os.O_RDWR|os.O_CREATE|os.O_TRUNC,0600) if err != nil { fmt.Printf("--F-- cannot open %s (%s)\n",gshCtx.ttyfile(),err) return file; } return file } func (gshCtx *GshContext)getline(hix int, skipping bool, prevline string) (string) { if( skipping ){ reader := bufio.NewReaderSize(os.Stdin,LINESIZE) line, _, _ := reader.ReadLine() return string(line) }else if true { return xgetline(hix,prevline,gshCtx) } /* else if( with_exgetline && gshCtx.GetLine != "" ){ //var xhix int64 = int64(hix); // cast newenv := os.Environ() newenv = append(newenv, "GSH_LINENO="+strconv.FormatInt(int64(hix),10) ) tty := gshCtx.ttyline() tty.WriteString(prevline) Pa := os.ProcAttr { "", // start dir newenv, //os.Environ(), []*os.File{os.Stdin,os.Stdout,os.Stderr,tty}, nil, } //fmt.Printf("--I-- getline=%s // %s\n",gsh_getlinev[0],gshCtx.GetLine) proc, err := os.StartProcess(gsh_getlinev[0],[]string{"getline","getline"},&Pa) if err != nil { fmt.Printf("--F-- getline process error (%v)\n",err) // for ; ; { } return "exit (getline program failed)" } //stat, err := proc.Wait() proc.Wait() buff := make([]byte,LINESIZE) count, err := tty.Read(buff) //_, err = tty.Read(buff) //fmt.Printf("--D-- getline (%d)\n",count) if err != nil { if ! (count == 0) { // && err.String() == "EOF" ) { fmt.Printf("--E-- getline error (%s)\n",err) } }else{ //fmt.Printf("--I-- getline OK \"%s\"\n",buff) } tty.Close() gline := string(buff[0:count]) return gline }else */ { // if isatty { fmt.Printf("!%d",hix) fmt.Print(PROMPT) // } reader := bufio.NewReaderSize(os.Stdin,LINESIZE) line, _, _ := reader.ReadLine() return string(line) } } //== begin ======================================================= getline /* * getline.c * 2020-0819 extracted from dog.c * getline.go * 2020-0822 ported to Go */ /* package main // getline main import ( "fmt" // fmt "strings" // strings "os" // os "syscall" // syscall //"bytes" // os //"os/exec" // os ) */ // C language compatibility functions var errno = 0 var stdin *os.File = os.Stdin var stdout *os.File = os.Stdout var stderr *os.File = os.Stderr var EOF = -1 var NULL = 0 type FILE os.File type StrBuff []byte var NULL_FP *os.File = nil var NULLSP = 0 //var LINESIZE = 1024 func system(cmdstr string)(int){ PA := syscall.ProcAttr { "", // the starting directory os.Environ(), []uintptr{os.Stdin.Fd(),os.Stdout.Fd(),os.Stderr.Fd()}, nil, } argv := strings.Split(cmdstr," ") pid,err := syscall.ForkExec(argv[0],argv,&PA) if( err != nil ){ fmt.Printf("--E-- syscall(%v) err(%v)\n",cmdstr,err) } syscall.Wait4(pid,nil,0,nil) /* argv := strings.Split(cmdstr," ") fmt.Fprintf(os.Stderr,"--I-- system(%v)\n",argv) //cmd := exec.Command(argv[0:]...) cmd := exec.Command(argv[0],argv[1],argv[2]) cmd.Stdin = strings.NewReader("output of system") var out bytes.Buffer cmd.Stdout = &out var serr bytes.Buffer cmd.Stderr = &serr err := cmd.Run() if err != nil { fmt.Fprintf(os.Stderr,"--E-- system(%v)err(%v)\n",argv,err) fmt.Printf("ERR:%s\n",serr.String()) }else{ fmt.Printf("%s",out.String()) } */ return 0 } func atoi(str string)(ret int){ ret,err := fmt.Sscanf(str,"%d",ret) if err == nil { return ret }else{ // should set errno return 0 } } func getenv(name string)(string){ val,got := os.LookupEnv(name) if got { return val }else{ return "?" } } func strcpy(dst StrBuff, src string){ var i int srcb := []byte(src) for i = 0; i < len(src) && srcb[i] != 0; i++ { dst[i] = srcb[i] } dst[i] = 0 } func xstrcpy(dst StrBuff, src StrBuff){ dst = src } func strcat(dst StrBuff, src StrBuff){ dst = append(dst,src...) } func strdup(str StrBuff)(string){ return string(str[0:strlen(str)]) } func sstrlen(str string)(int){ return len(str) } func strlen(str StrBuff)(int){ var i int for i = 0; i < len(str) && str[i] != 0; i++ { } return i } func sizeof(data StrBuff)(int){ return len(data) } func isatty(fd int)(ret int){ return 1 } func fopen(file string,mode string)(fp*os.File){ if mode == "r" { fp,err := os.Open(file) if( err != nil ){ fmt.Printf("--E-- fopen(%s,%s)=(%v)\n",file,mode,err) return NULL_FP; } return fp; }else{ fp,err := os.OpenFile(file,os.O_RDWR|os.O_CREATE|os.O_TRUNC,0600) if( err != nil ){ return NULL_FP; } return fp; } } func fclose(fp*os.File){ fp.Close() } func fflush(fp *os.File)(int){ return 0 } func fgetc(fp*os.File)(int){ var buf [1]byte _,err := fp.Read(buf[0:1]) if( err != nil ){ return EOF; }else{ return int(buf[0]) } } func sfgets(str*string, size int, fp*os.File)(int){ buf := make(StrBuff,size) var ch int var i int for i = 0; i < len(buf)-1; i++ { ch = fgetc(fp) //fprintf(stderr,"--fgets %d/%d %X\n",i,len(buf),ch) if( ch == EOF ){ break; } buf[i] = byte(ch); if( ch == '\n' ){ break; } } buf[i] = 0 //fprintf(stderr,"--fgets %d/%d (%s)\n",i,len(buf),buf[0:i]) return i } func fgets(buf StrBuff, size int, fp*os.File)(int){ var ch int var i int for i = 0; i < len(buf)-1; i++ { ch = fgetc(fp) //fprintf(stderr,"--fgets %d/%d %X\n",i,len(buf),ch) if( ch == EOF ){ break; } buf[i] = byte(ch); if( ch == '\n' ){ break; } } buf[i] = 0 //fprintf(stderr,"--fgets %d/%d (%s)\n",i,len(buf),buf[0:i]) return i } func fputc(ch int , fp*os.File)(int){ var buf [1]byte buf[0] = byte(ch) fp.Write(buf[0:1]) return 0 } func fputs(buf StrBuff, fp*os.File)(int){ fp.Write(buf) return 0 } func xfputss(str string, fp*os.File)(int){ return fputs([]byte(str),fp) } func sscanf(str StrBuff,fmts string, params ...interface{})(int){ fmt.Sscanf(string(str[0:strlen(str)]),fmts,params...) return 0 } func fprintf(fp*os.File,fmts string, params ...interface{})(int){ fmt.Fprintf(fp,fmts,params...) return 0 } // Command Line IME //----------------------------------------------------------------------- MyIME var MyIMEVER = "MyIME/0.0.2"; type RomKana struct { pat string; out string; } var dicents = 0 var romkana [1024]RomKana func readDic()(int){ var rk *os.File; var dic = "MyIME-dic.txt"; //rk = fopen("romkana.txt","r"); //rk = fopen("JK-JA-morse-dic.txt","r"); rk = fopen(dic,"r"); if( rk == NULL_FP ){ if( true ){ fprintf(stderr,"--%s-- Could not load %s\n",MyIMEVER,dic); } return -1; } if( true ){ var di int; var line = make(StrBuff,1024); var pat string var out string for di = 0; di < 1024; di++ { if( fgets(line,sizeof(line),rk) == NULLSP ){ break; } fmt.Sscanf(string(line[0:strlen(line)]),"%s %s",&pat,&out); //sscanf(line,"%s %[^\r\n]",&pat,&out); romkana[di].pat = pat; romkana[di].out = out; //fprintf(stderr,"--Dd- %-10s %s\n",pat,out) } dicents += di if( false ){ fprintf(stderr,"--%s-- loaded romkana.txt [%d]\n",MyIMEVER,di); for di = 0; di < dicents; di++ { fprintf(stderr, "%s %s\n",romkana[di].pat,romkana[di].out); } } } fclose(rk); //romkana[dicents].pat = "//ddump" //romkana[dicents].pat = "//ddump" // dump the dic. and clean the command input return 0; } func matchlen(stri string, pati string)(int){ if strBegins(stri,pati) { return len(pati) }else{ return 0 } } func convs(src string)(string){ var si int; var sx = len(src); var di int; var mi int; var dstb []byte for si = 0; si < sx; { // search max. match from the position if strBegins(src[si:],"%x/") { // %x/integer/ // s/a/b/ ix := strings.Index(src[si+3:],"/") if 0 < ix { var iv int = 0 //fmt.Sscanf(src[si+3:si+3+ix],"%d",&iv) fmt.Sscanf(src[si+3:si+3+ix],"%v",&iv) sval := fmt.Sprintf("%x",iv) bval := []byte(sval) dstb = append(dstb,bval...) si = si+3+ix+1 continue } } if strBegins(src[si:],"%d/") { // %d/integer/ // s/a/b/ ix := strings.Index(src[si+3:],"/") if 0 < ix { var iv int = 0 fmt.Sscanf(src[si+3:si+3+ix],"%v",&iv) sval := fmt.Sprintf("%d",iv) bval := []byte(sval) dstb = append(dstb,bval...) si = si+3+ix+1 continue } } var maxlen int = 0; var len int; mi = -1; for di = 0; di < dicents; di++ { len = matchlen(src[si:],romkana[di].pat); if( maxlen < len ){ maxlen = len; mi = di; } } if( 0 < maxlen ){ out := romkana[mi].out; dstb = append(dstb,[]byte(out)...); si += maxlen; }else{ dstb = append(dstb,src[si]) si += 1; } } return string(dstb) } func trans(src string)(int){ dst := convs(src); xfputss(dst,stderr); return 0; } //------------------------------------------------------------- LINEEDIT // "?" at the top of the line means searching history var GO_UP = 201 var GO_DOWN = 202 var GO_RIGHT = 203 var GO_LEFT = 204 func getesc(in *os.File)(int){ var ch1 int var ch2 int ch1 = fgetc(in); ch2 = fgetc(in); if false { fprintf(stderr,"(%c/%X %c/%X)",ch1,ch1,ch2,ch2); } switch( ch1 ){ case '[': switch( ch2 ){ case 'A': return GO_UP; // ^ case 'B': return GO_DOWN; // v case 'C': return GO_RIGHT; // > case 'D': return GO_LEFT; // < } break; } return 0; } func clearline(){ var i int fprintf(stderr,"\r"); for i = 0; i < 80; i++ { fputc(' ',os.Stderr); } fprintf(stderr,"\r"); } var romkanmode bool; var insertmode int; func redraw(lno int,line string,right string){ var bsi int var rlen int var romkanmark string if( romkanmode ){ //romkanmark = " *"; }else{ romkanmark = ""; } clearline(); xfputss("\r",stderr); if( romkanmode ){ fprintf(stderr,"[\343\201\202r]"); //fprintf(stderr,"[R]"); } fprintf(stderr,"!%d! ",lno); if( romkanmode ){ trans(line); //fputs(romkanmark,stderr); trans(right); }else{ xfputss(line,stderr); //fputs(romkanmark,stderr); xfputss(right,stderr); } if true { //romkanmode { fprintf(stderr,"\r") if romkanmode { fprintf(stderr,"[\343\201\202r]"); fprintf(stderr,"!%d! ",lno); trans(line); }else{ fprintf(stderr,"!%d! ",lno); xfputss(line,stderr); } }else{ rlen = len(right) + len(romkanmark); if true { for bsi = 0; bsi < rlen; bsi++ { fputc('\b',stderr); } } } } func delHeadChar(str string)(rline string,head string){ _,clen := utf8.DecodeRune([]byte(str)) head = string(str[0:clen]) return str[clen:],head } func delTailChar(str string)(rline string, last string){ var i = 0 var clen = 0 for { _,siz := utf8.DecodeRune([]byte(str)[i:]) if siz <= 0 { break } clen = siz i += siz } last = str[len(str)-clen:] return str[0:len(str)-clen],last } // 3> for output and history // 4> for keylog? // Command Line Editor func xgetline(lno int, prevline string, gsh*GshContext)(string){ lastlno := lno; line := "" right := "" //readDic(); if( isatty(0) == 0 ){ if( sfgets(&line,LINESIZE,stdin) == NULL ){ line = "exit\n"; }else{ } goto EXIT_GOT; } if( true ){ //var pts string; //pts = ptsname(0); //pts = ttyname(0); //fprintf(stderr,"--pts[0] = %s\n",pts?pts:"?"); } if( false ){ fprintf(stderr,"! "); fflush(stderr); sfgets(&line,LINESIZE,stdin); }else{ var ch int; system("/bin/stty -echo -icanon"); redraw(lno,line,right); line = "" right = "" pch := -1 for { if( pch != -1 ){ ch = pch pch = -1 }else{ ch = fgetc(stdin); } if( ch == 033 ){ ch = getesc(stdin); } if( ch == '\\' ){ fputc(ch,stderr) ch = fgetc(stdin) if( ch == 'j' || ch == 'J' ){ readDic(); romkanmode = !romkanmode; if( ch == 'J' ){ fprintf(stderr,"J\r\n"); } redraw(lno,line,right); continue }else if( ch == 'i' || ch == 'I' ){ dst := convs(line+right); line = dst right = "" if( ch == 'I' ){ fprintf(stderr,"I\r\n"); } redraw(lno,line,right); continue }else{ pch = ch ch = '\\' } } switch( ch ){ case 0: continue; case GO_UP: if lno == 1 { continue } cmd,ok := gsh.cmdStringInHistory(lno-1) if ok { line = cmd right = "" lno = lno - 1 } redraw(lno,line,right); continue case GO_DOWN: cmd,ok := gsh.cmdStringInHistory(lno+1) if ok { line = cmd right = "" lno = lno + 1 }else{ line = "" right = "" if lno == lastlno-1 { lno = lno + 1 } } redraw(lno,line,right); continue case GO_LEFT: if 0 < len(line) { xline,tail := delTailChar(line) line = xline right = tail + right } redraw(lno,line,right); continue; case GO_RIGHT: if( 0 < len(right) && right[0] != 0 ){ xright,head := delHeadChar(right) right = xright line += head } redraw(lno,line,right); continue; case EOF: goto EXIT; case 'R'-0x40: // replace dst := convs(line+right); line = dst right = "" redraw(lno,line,right); continue; case 'T'-0x40: // just show the result readDic(); romkanmode = !romkanmode; redraw(lno,line,right); continue; case 'L'-0x40: redraw(lno,line,right); continue case 'K'-0x40: right = "" redraw(lno,line,right); continue case 'E'-0x40: line += right right = "" redraw(lno,line,right); continue case 'A'-0x40: right = line + right line = "" redraw(lno,line,right); continue case 'U'-0x40: line = "" right = "" clearline(); redraw(lno,line,right); continue; case 0x7F: // DEL if( 0 < len(line) ){ line,_ = delTailChar(line) redraw(lno,line,right); } continue; case 'H'-0x40: if( 0 < len(line) ){ line,_ = delTailChar(line) redraw(lno,line,right); } continue; } if( ch == '\n' || ch == '\r' ){ fputc(ch,stderr); break; } line += string(ch); redraw(lno,line,right); } EXIT: system("/bin/stty echo sane"); } //fprintf(stderr,"\r\nLINE:%s\r\n",line); EXIT_GOT: return line + right; } func getline_main(){ line := xgetline(0,"",nil) fprintf(stderr,"%s\n",line); /* dp = strpbrk(line,"\r\n"); if( dp != NULL ){ *dp = 0; } if( 0 ){ fprintf(stderr,"\n(%d)\n",int(strlen(line))); } if( lseek(3,0,0) == 0 ){ if( romkanmode ){ var buf [8*1024]byte; convs(line,buff); strcpy(line,buff); } write(3,line,strlen(line)); ftruncate(3,lseek(3,0,SEEK_CUR)); //fprintf(stderr,"outsize=%d\n",(int)lseek(3,0,SEEK_END)); lseek(3,0,SEEK_SET); close(3); }else{ fprintf(stderr,"\r\ngotline: "); trans(line); //printf("%s\n",line); printf("\n"); } */ } //== end ========================================================= getline // // $USERHOME/.gsh/ // gsh-rc.txt, or gsh-configure.txt // gsh-history.txt // gsh-aliases.txt // should be conditional? // func (gshCtx *GshContext)gshSetupHomedir()(bool) { homedir,found := userHomeDir() if !found { fmt.Printf("--E-- You have no UserHomeDir\n") return true } gshhome := homedir + "/" + GSH_HOME _, err2 := os.Stat(gshhome) if err2 != nil { err3 := os.Mkdir(gshhome,0700) if err3 != nil { fmt.Printf("--E-- Could not Create %s (%s)\n", gshhome,err3) return true } fmt.Printf("--I-- Created %s\n",gshhome) } gshCtx.GshHomeDir = gshhome return false } func setupGshContext()(GshContext,bool){ gshPA := syscall.ProcAttr { "", // the staring directory os.Environ(), // environ[] []uintptr{os.Stdin.Fd(),os.Stdout.Fd(),os.Stderr.Fd()}, nil, // OS specific } cwd, _ := os.Getwd() gshCtx := GshContext { cwd, // StartDir "", // GetLine []GChdirHistory { {cwd,time.Now(),0} }, // ChdirHistory gshPA, []GCommandHistory{}, //something for invokation? GCommandHistory{}, // CmdCurrent false, []int{}, syscall.Rusage{}, "", // GshHomeDir Ttyid(), false, false, []PluginInfo{}, []string{}, " ", "v", ValueStack{}, GServer{"",""}, // LastServer "", // RSERV cwd, // RWD CheckSum{}, } err := gshCtx.gshSetupHomedir() return gshCtx, err } func (gsh*GshContext)gshelllh(gline string)(bool){ ghist := gsh.CmdCurrent ghist.WorkDir,_ = os.Getwd() ghist.WorkDirX = len(gsh.ChdirHistory)-1 //fmt.Printf("--D--ChdirHistory(@%d)\n",len(gsh.ChdirHistory)) ghist.StartAt = time.Now() rusagev1 := Getrusagev() gsh.CmdCurrent.FoundFile = []string{} fin := gsh.tgshelll(gline) rusagev2 := Getrusagev() ghist.Rusagev = RusageSubv(rusagev2,rusagev1) ghist.EndAt = time.Now() ghist.CmdLine = gline ghist.FoundFile = gsh.CmdCurrent.FoundFile /* record it but not show in list by default if len(gline) == 0 { continue } if gline == "hi" || gline == "history" { // don't record it continue } */ gsh.CommandHistory = append(gsh.CommandHistory, ghist) return fin } // Main loop func script(gshCtxGiven *GshContext) (_ GshContext) { gshCtxBuf,err0 := setupGshContext() if err0 { return gshCtxBuf; } gshCtx := &gshCtxBuf //fmt.Printf("--I-- GSH_HOME=%s\n",gshCtx.GshHomeDir) //resmap() /* if false { gsh_getlinev, with_exgetline := which("PATH",[]string{"which","gsh-getline","-s"}) if with_exgetline { gsh_getlinev[0] = toFullpath(gsh_getlinev[0]) gshCtx.GetLine = toFullpath(gsh_getlinev[0]) }else{ fmt.Printf("--W-- No gsh-getline found. Using internal getline.\n"); } } */ ghist0 := gshCtx.CmdCurrent // something special, or gshrc script, or permanent history gshCtx.CommandHistory = append(gshCtx.CommandHistory,ghist0) prevline := "" skipping := false for hix := len(gshCtx.CommandHistory); ; { gline := gshCtx.getline(hix,skipping,prevline) if skipping { if strings.Index(gline,"fi") == 0 { fmt.Printf("fi\n"); skipping = false; }else{ //fmt.Printf("%s\n",gline); } continue } if strings.Index(gline,"if") == 0 { //fmt.Printf("--D-- if start: %s\n",gline); skipping = true; continue } if false { os.Stdout.Write([]byte("gotline:")) os.Stdout.Write([]byte(gline)) os.Stdout.Write([]byte("\n")) } gline = strsubst(gshCtx,gline,true) if false { fmt.Printf("fmt.Printf %%v - %v\n",gline) fmt.Printf("fmt.Printf %%s - %s\n",gline) fmt.Printf("fmt.Printf %%x - %s\n",gline) fmt.Printf("fmt.Printf %%U - %s\n",gline) fmt.Printf("Stouut.Write -") os.Stdout.Write([]byte(gline)) fmt.Printf("\n") } /* // should be cared in substitution ? if 0 < len(gline) && gline[0] == '!' { xgline, set, err := searchHistory(gshCtx,gline) if err { continue } if set { // set the line in command line editor } gline = xgline } */ fin := gshCtx.gshelllh(gline) if fin { break; } prevline = gline; hix++; } return *gshCtx } func main() { gshCtxBuf := GshContext{} gsh := &gshCtxBuf argv := os.Args if 1 < len(argv) { if isin("version",argv){ gsh.showVersion(argv) return } comx := isinX("-c",argv) if 0 < comx { gshCtxBuf,err := setupGshContext() gsh := &gshCtxBuf if !err { gsh.gshellv(argv[comx+1:]) } return } } if 1 < len(argv) && isin("-s",argv) { }else{ gsh.showVersion(append(argv,[]string{"-l","-a"}...)) } script(nil) //gshCtx := script(nil) //gshelll(gshCtx,"time") } //
//
Consideration
// - inter gsh communication, possibly running in remote hosts -- to be remote shell // - merged histories of multiple parallel gsh sessions // - alias as a function or macro // - instant alias end environ export to the permanent > ~/.gsh/gsh-alias and gsh-environ // - retrieval PATH of files by its type // - gsh as an IME with completion using history and file names as dictionaies // - gsh a scheduler in precise time of within a millisecond // - all commands have its subucomand after "---" symbol // - filename expansion by "-find" command // - history of ext code and output of each commoand // - "script" output for each command by pty-tee or telnet-tee // - $BUILTIN command in PATH to show the priority // - "?" symbol in the command (not as in arguments) shows help request // - searching command with wild card like: which ssh-* // - longformat prompt after long idle time (should dismiss by BS) // - customizing by building plugin and dynamically linking it // - generating syntactic element like "if" by macro expansion (like CPP) >> alias // - "!" symbol should be used for negation, don't wast it just for job control // - don't put too long output to tty, record it into GSH_HOME/session-id/comand-id.log // - making canonical form of command at the start adding quatation or white spaces // - name(a,b,c) ... use "(" and ")" to show both delimiter and realm // - name? or name! might be useful // - htar format - packing directory contents into a single html file using data scheme // - filepath substitution shold be done by each command, expecially in case of builtins // - @N substition for the history of working directory, and @spec for more generic ones // - @dir prefix to do the command at there, that means like (chdir @dir; command) // - GSH_PATH for plugins // - standard command output: list of data with name, size, resouce usage, modified time // - generic sort key option -nm name, -sz size, -ru rusage, -ts start-time, -tm mod-time // -wc word-count, grep match line count, ... // - standard command execution result: a list of string, -tm, -ts, -ru, -sz, ... // - -tailf-filename like tail -f filename, repeat close and open before read // - max. size and max. duration and timeout of (generated) data transfer // - auto. numbering, aliasing, IME completion of file name (especially rm of quieer name) // - IME "?" at the top of the command line means searching history // - IME %d/0x10000/ %x/ffff/ // - IME ESC to go the edit mode like in vi, and use :command as :s/x/y/g to edit history // - gsh in WebAssembly // - gsh as a HTTP server of online-manual //---END--- (^-^)/ITS more
/*
References
--> */ //

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