ftest: basic implementation.

m/cmd/goblin/main.go

@@ -21,6 +21,7 @@ import(
 	"github.com/k1574/goblin/m/tool/ec"
 	"github.com/k1574/goblin/m/tool/read"
 	"github.com/k1574/goblin/m/tool/wc"
+	"github.com/k1574/goblin/m/tool/ftest"
 )
 
 func main() {
@@ -44,6 +45,7 @@ func main() {
 		"ec" : ec.Run,
 		"read" : read.Run,
 		"wc" : wc.Run,
+		"ftest" : ftest.Run,
 	}
 
 	multitool.Main("goblin", tools)

m/tool/ftest/main.go

@@ -0,0 +1,113 @@
+package ftest
+
+import (
+	"os"
+	"io"
+	"bufio"
+	"fmt"
+	"flag"
+)
+
+var (
+	flags [lastFlag]bool
+	flagList []int
+	flagMap = map[int] func(os.FileInfo) bool{
+		fileFlag : IsFile,
+		dirFlag : IsDir,
+	}
+)
+
+const(
+	fileFlag = iota
+	readFlag
+	writFlag
+	execFlag
+	dirFlag
+	sizeFlag
+	lastFlag
+)
+
+func FileInfo(p string) (os.FileInfo, error) {
+	s, err := os.Stat(p)
+	if err != nil {
+		return nil, err
+	}
+
+	return s, nil
+}
+
+func IsFile(fi os.FileInfo) bool {
+	mode := fi.Mode()
+	return mode.IsRegular()
+}
+
+func IsDir(fi os.FileInfo) bool {
+	return fi.IsDir()
+}
+
+func checkFile(p string) bool {
+	fi, err := FileInfo(p)
+	if err != nil {
+		return false
+	}
+
+	for _, v := range flagList {
+		if !flagMap[v](fi){
+			return false
+		}
+	}
+
+	return true
+}
+
+func Run(args []string) {
+	arg0 := args[0]
+	args = args[1:]
+	flagSet := flag.NewFlagSet(arg0, flag.ExitOnError)
+	flagSet.Usage = func() {
+		flagSet.Usage()
+		os.Exit(1)
+	}
+
+	flagSet.BoolVar(&flags[fileFlag], "f", false, "is file")
+	flagSet.BoolVar(&flags[dirFlag], "d", false, "is directory")
+
+	flagSet.Parse(args)
+	args = flagSet.Args()
+
+	if len(args) != 0 {
+		flagSet.Usage()
+	}
+
+	for i, v := range flags {
+		if v {
+			break;
+		} else if i == (len(flags) - 1) {
+			flagSet.Usage()
+		}
+	}
+
+	for i, v := range flags {
+		if v {
+			flagList = append(flagList, i)
+		}
+	}
+
+	rd := bufio.NewReader(os.Stdin)
+	for {
+		s, err := rd.ReadString('\n')
+		if err == io.EOF {
+			os.Exit(0)
+		} else if err != nil {
+			panic(err)
+		}
+
+		if s[len(s)-1] == '\n' {
+			s = s[:len(s)-1]
+		}
+
+		if checkFile(s) {
+			fmt.Println(s)
+		}
+	}
+}