diff --git a/go.mod b/go.mod
index 8d5edd3..f8eac01 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/surdeus/goblin
 
 go 1.18
 
-require github.com/surdeus/gomtool v0.0.0-20230324073313-c382bc403f8b // indirect
+require github.com/surdeus/gomtool v0.0.0-20230324163514-3199e25c3890 // indirect
diff --git a/go.sum b/go.sum
index c1da825..bc2c4cd 100644
--- a/go.sum
+++ b/go.sum
@@ -14,3 +14,5 @@ github.com/surdeus/gomtool v0.0.0-20230324070550-2fb327b6a6a6 h1:aOXHUmhQS/mCo8r
 github.com/surdeus/gomtool v0.0.0-20230324070550-2fb327b6a6a6/go.mod h1:48d4QXOu0MwH0fbqseBInNdS6WiJ0+EzZU9K5sGu4uo=
 github.com/surdeus/gomtool v0.0.0-20230324073313-c382bc403f8b h1:9IJVeXxRDTPlp12DQ8M76ydoyDCUx6J4up5UM2DwIXQ=
 github.com/surdeus/gomtool v0.0.0-20230324073313-c382bc403f8b/go.mod h1:48d4QXOu0MwH0fbqseBInNdS6WiJ0+EzZU9K5sGu4uo=
+github.com/surdeus/gomtool v0.0.0-20230324163514-3199e25c3890 h1:mT4VDgCb2AgPfq2k4GfXI8O3I2sIjHJUaJwBvx95AYM=
+github.com/surdeus/gomtool v0.0.0-20230324163514-3199e25c3890/go.mod h1:48d4QXOu0MwH0fbqseBInNdS6WiJ0+EzZU9K5sGu4uo=
diff --git a/src/cmd/goblin/main.go b/src/cmd/goblin/main.go
index ac874d0..258ab22 100644
--- a/src/cmd/goblin/main.go
+++ b/src/cmd/goblin/main.go
@@ -18,7 +18,6 @@ import (
 	"github.com/surdeus/goblin/src/tool/mk"
 	"github.com/surdeus/goblin/src/tool/mkdir"
 	"github.com/surdeus/goblin/src/tool/noext"
-	"github.com/surdeus/goblin/src/tool/path"
 	"github.com/surdeus/goblin/src/tool/paths"
 	"github.com/surdeus/goblin/src/tool/quote"
 	"github.com/surdeus/goblin/src/tool/read"
@@ -57,8 +56,7 @@ func main() {
 		"ftest":    mtool.Tool{ftest.Run, "filter files by specified features", ""},
 		"range":    mtool.Tool{grange.Run, "too lazy", ""},
 		"in":       mtool.Tool{in.Run, "filter strings from stdin that aren not in arguments", ""},
-		"useprog":  mtool.Tool{useprog.Run, "print the name of the first existing program in arg list", ""},
-		"path":     mtool.Tool{path.Run, "print cross platform path based on cmd arguments", ""},
+		"which":  mtool.Tool{useprog.Run, "print the name or the path of the first existing program in arg list", ""},
 		"mk":       mtool.Tool{mk.Run, "file dependency system, simpler make", ""},
 		"awk":      mtool.Tool{awk.Run, "simple scripting language for working with string templates", ""},
 		"paths": mtool.Tool{
diff --git a/src/tool/awk/goawk.go b/src/tool/awk/goawk.go
index ea55cc0..9c7135c 100644
--- a/src/tool/awk/goawk.go
+++ b/src/tool/awk/goawk.go
@@ -41,6 +41,8 @@ import (
 	"github.com/surdeus/goblin/src/tool/awk/interp"
 	"github.com/surdeus/goblin/src/tool/awk/lexer"
 	"github.com/surdeus/goblin/src/tool/awk/parser"
+	
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
 const (
@@ -67,7 +69,7 @@ Additional GoAWK arguments:
 `
 )
 
-func Run(args []string) {
+func Run(flags *mtool.Flags) {
 	// Parse command line arguments manually rather than using the
 	// "flag" package, so we can support flags with no space between
 	// flag and argument, like '-F:' (allowed by POSIX)
@@ -83,7 +85,8 @@ func Run(args []string) {
 	outputMode := ""
 	header := false
 
-	argv0 := args[0]
+	argv0 := flags.UtilName()
+	args := flags.Args()
 
 	var i int
 	for i = 1; i < len(args); i++ {
diff --git a/src/tool/ftest/main.go b/src/tool/ftest/main.go
index 18d5fdd..a8f0b3a 100644
--- a/src/tool/ftest/main.go
+++ b/src/tool/ftest/main.go
@@ -5,7 +5,7 @@ import (
 	"io"
 	"bufio"
 	"fmt"
-	"flag"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
 var (
@@ -76,23 +76,14 @@ func checkFile(p string) bool {
 	return true
 }
 
-func Run(args []string) {
-	arg0 := args[0]
-	args = args[1:]
-	flagSet := flag.NewFlagSet(arg0, flag.ExitOnError)
-	flagSet.Usage = func() {
-		fmt.Fprintf(os.Stderr, "usage: %s <options>\n", arg0)
-		flagSet.PrintDefaults()
-		os.Exit(1)
-	}
-
+func Run(flagSet *mtool.Flags) {
 	flagSet.BoolVar(&flags[fileFlag], "f", false, "is file")
 	flagSet.BoolVar(&flags[dirFlag], "d", false, "is directory")
 	flagSet.BoolVar(&flags[writFlag], "w", false, "is writable")
 	flagSet.BoolVar(&flags[readFlag], "r", false, "is readable")
 
-	flagSet.Parse(args)
-	args = flagSet.Args()
+	flagSet.Parse()
+	args := flagSet.Args()
 
 	if len(args) != 0 {
 		flagSet.Usage()
diff --git a/src/tool/grange/main.go b/src/tool/grange/main.go
index 41c3cc2..aba21e2 100644
--- a/src/tool/grange/main.go
+++ b/src/tool/grange/main.go
@@ -1,14 +1,13 @@
 package grange
 /* Concatenate files in "stdout". */
 import(
-	"os"
-	"flag"
 	"fmt"
 	"strconv"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
 var(
-	flagSet *flag.FlagSet
+	flagSet *mtool.Flags
 	args []string
 	blockSize int
 	rangeType string
@@ -106,17 +105,11 @@ func ByteRange() {
 func RuneRange() {
 }
 
-func Run(arg []string) {	
-	arg0 := arg[0]
-	args = arg[1:]
-	flagSet = flag.NewFlagSet(arg0, flag.ExitOnError)
-	flagSet.StringVar(&rangeType, "t", "int", "range type")
-	flagSet.Usage = func() {
-		fmt.Fprintf(os.Stderr, "usage: %s [options] [files]\n", arg0)
-		flagSet.PrintDefaults()
-		os.Exit(1)
-	}
-	flagSet.Parse(args)
+func Run(flags *mtool.Flags) {	
+	flags.StringVar(&rangeType, "t", "int", "range type")
+	flags.Parse()
 	args = flagSet.Args()
+	flagSet = flags
+	
 	rangeTypeMap[rangeType]()
 }
diff --git a/src/tool/in/main.go b/src/tool/in/main.go
index 3f2e5e2..f414c3a 100644
--- a/src/tool/in/main.go
+++ b/src/tool/in/main.go
@@ -5,27 +5,18 @@ import (
 	"io"
 	"bufio"
 	"fmt"
-	"flag"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
-func Run(args []string) {
+func Run(flagSet *mtool.Flags) {
 	var (
 		print bool
 		not bool
 	)
-	arg0 := args[0]
-	args = args[1:]
-	flagSet := flag.NewFlagSet(arg0, flag.ExitOnError)
 	flagSet.BoolVar(&print, "p", false, "print matching lines")
 	flagSet.BoolVar(&not, "n", false, "find not matching lines")
-	flagSet.Usage = func() {
-		fmt.Fprintf(os.Stderr, "usage: %s <str1> [str2, ...str3]\n", arg0)
-		flagSet.PrintDefaults()
-		os.Exit(1)
-	}
-
-	flagSet.Parse(args)
-	args = flagSet.Args()
+	flagSet.Parse()
+	args := flagSet.Args()
 
 	if len(args) == 0 {
 		//flagSet.Usage()
diff --git a/src/tool/ln/main.go b/src/tool/ln/main.go
index 662b2c4..339e0dd 100644
--- a/src/tool/ln/main.go
+++ b/src/tool/ln/main.go
@@ -1,18 +1,17 @@
 package ln
 
 import (
-	"flag"
 	"fmt"
 	"os"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
-func Run(args []string) {
+func Run(flagSet *mtool.Flags) {
 	var lflag bool
-	flagSet := flag.NewFlagSet(args[0], flag.ExitOnError)
 	flagSet.BoolVar(&lflag, "s", false, "make a symbolic link, not a hard one")
 
-	flagSet.Parse(args[1:])
-	args = flagSet.Args()
+	flagSet.Parse()
+	args := flagSet.Args()
 
 	if len(args) != 2 {
 		flagSet.Usage()
diff --git a/src/tool/mk/main.go b/src/tool/mk/main.go
index 596b93c..64b1cb7 100644
--- a/src/tool/mk/main.go
+++ b/src/tool/mk/main.go
@@ -2,7 +2,6 @@ package mk
 
 import (
 	"bufio"
-	"flag"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -11,6 +10,7 @@ import (
 	"sync"
 
 	"github.com/surdeus/goblin/src/pathx"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
 // True if messages should be printed without fancy colors.
@@ -317,24 +317,19 @@ func mkPrintRecipe(target string, recipe string, quiet bool) {
 	mkMsgMutex.Unlock()
 }
 
-func Run(args []string) {
+func Run(flags *mtool.Flags) {
 	var mkfilepath string
 	var interactive bool
 	var dryrun bool
 	var shallowrebuild bool
 	var quiet bool
 
-	arg0 := args[0]
-	args = args[1:]
-
 	if mkincdir := os.Getenv("MKINCDIR"); mkincdir == "" {
 		homeDir, _ := os.UserHomeDir()
 		homeDir = pathx.FromReal(homeDir).String()
 		os.Setenv("MKINCDIR", homeDir+"/app/goblin/mk/inc")
 	}
 
-	flags := flag.NewFlagSet(arg0, flag.ExitOnError)
-
 	flags.StringVar(&mkfilepath, "f", "mkfile", "use the given file as mkfile")
 	flags.BoolVar(&dryrun, "n", false, "print commands without actually executing")
 	flags.BoolVar(&shallowrebuild, "r", false, "force building of just targets")
@@ -342,7 +337,7 @@ func Run(args []string) {
 	flags.IntVar(&subprocsAllowed, "p", 4, "maximum number of jobs to execute in parallel")
 	flags.BoolVar(&interactive, "i", false, "prompt before executing rules")
 	flags.BoolVar(&quiet, "q", false, "don't print recipes before executing them")
-	flags.Parse(args)
+	flags.Parse()
 
 	mkfile, err := os.Open(pathx.From(mkfilepath).Real())
 	if err != nil {
diff --git a/src/tool/paths/main.go b/src/tool/paths/main.go
index 63d8697..9cc6451 100644
--- a/src/tool/paths/main.go
+++ b/src/tool/paths/main.go
@@ -3,7 +3,6 @@ package paths
 import (
 	"bufio"
 	"errors"
-	"flag"
 	"fmt"
 	"log"
 	"os"
@@ -11,6 +10,7 @@ import (
 	"strings"
 
 	"github.com/surdeus/goblin/src/pathx"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
 var (
@@ -50,17 +50,15 @@ func handlePath(p string) {
 	fmt.Println(toPrint)
 }
 
-func Run(args []string) {
-	arg0 := args[0]
-	args = args[1:]
-	flags := flag.NewFlagSet(arg0, flag.ExitOnError)
+func Run(flags *mtool.Flags) {
 	flags.StringVar(&part, "p", "all", "part of path you want to print")
 	flags.BoolVar(&r, "r", false, "print real OS dependent paths")
 	flags.BoolVar(&fromReal, "fr", false, "take input paths as real ones")
 	flags.BoolVar(&ec, "ec", false, "escape characters (mostly for '\\' char in Git bash")
 
-	flags.Parse(args)
-	args = flags.Args()
+	flags.Parse()
+	args := flags.Args()
+	
 	lhandler, ok := handlers[part]
 	if !ok {
 		log.Fatal(noPartErr)
diff --git a/src/tool/useprog/main.go b/src/tool/useprog/main.go
index 97e5e81..0d8469b 100644
--- a/src/tool/useprog/main.go
+++ b/src/tool/useprog/main.go
@@ -1,26 +1,16 @@
 package useprog
 
 import (
-	"os"
 	"os/exec"
 	"fmt"
-	"flag"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
-func Run(args []string) {
-	arg0 := args[0]
-	args = args[1:]
-	flagSet := flag.NewFlagSet(arg0, flag.ExitOnError)
-	flagSet.Usage = func() {
-		fmt.Fprintf(os.Stderr, "usage: %s <prog1> [prog2, ...prog3]\n", arg0)
-		flagSet.PrintDefaults()
-		os.Exit(1)
-	}
+func Run(flagSet *mtool.Flags) {
+	flagSet.Parse()
+	args := flagSet.Args()
 
-	flagSet.Parse(args)
-	args = flagSet.Args()
-
-	if len(args) == 0 {
+	if len(args) < 1 {
 		flagSet.Usage()
 	}
 
diff --git a/src/tool/whoami/main.go b/src/tool/whoami/main.go
index 0c12ccd..c299788 100644
--- a/src/tool/whoami/main.go
+++ b/src/tool/whoami/main.go
@@ -3,20 +3,13 @@ package whoami
 import(
 	"os"
 	"os/user"
-	"flag"
 	"fmt"
 	"log"
+	"github.com/surdeus/gomtool/src/mtool"
 )
 
-func Run(args []string) {
-	arg0 := args[0]
-	args = args[1:]
-	flagSet := flag.NewFlagSet(arg0, flag.ExitOnError)
-	flagSet.Usage = func() {
-		fmt.Fprintf(os.Stderr, "Usage of %s: %s\n", arg0, arg0)
-		flagSet.PrintDefaults()
-	}
-	flagSet.Parse(args)
+func Run(flagSet *mtool.Flags) {
+	flagSet.Parse()
 
 	if len(flagSet.Args())>0 {
 		flagSet.Usage()