Add support for the RCW daemon

core/copy.go

@@ -1,7 +1,6 @@
 package core
 
 import (
-	"bufio"
 	"fmt"
 	"os"
 	"strings"
@@ -59,14 +58,11 @@ func CopyArgument(targetLocation string, field int, passphrase []byte) {
 
 // ClipClearArgument reads the assigned clipboard contents from stdin and passes them to clipClearProcess.
 func ClipClearArgument() {
-	// read previous clipboard contents from stdin
-	clipScanner := bufio.NewScanner(os.Stdin)
-	if clipScanner.Scan() {
-		assignedContents := clipScanner.Text()
-		clipClearProcess(assignedContents)
-	} else {
+	assignedContents := readFromStdin()
+	if assignedContents == "" {
 		os.Exit(0) // use os.Exit instead of core.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
 	}
+	clipClearProcess(assignedContents)
 }
 
 // GenTOTP generates a TOTP token from a secret (supports standard and Steam TOTP).

core/launchClipClearProcessCLIGeneric.go

@@ -10,8 +10,7 @@ import (
 // LaunchClipClearProcess launches the timed clipboard clearing process.
 // For non-interactive CLI implementations, an entirely separate process is created for this purpose.
 func LaunchClipClearProcess(copySubject string) {
-	executableName := os.Args[0]
-	cmd := exec.Command(executableName, "clipclear")
+	cmd := exec.Command(os.Args[0], "clipclear")
 	writeToStdin(cmd, copySubject)
 	err := cmd.Start()
 	if err != nil {

core/launchClipClearProcessCLIUNIX.go

@@ -11,8 +11,7 @@ import (
 // LaunchClipClearProcess launches the timed clipboard clearing process.
 // For non-interactive CLI implementations, an entirely separate process is created for this purpose.
 func LaunchClipClearProcess(copySubject string, isWayland bool) {
-	executableName := os.Args[0]
-	cmd := exec.Command(executableName, "clipclear", strconv.FormatBool(isWayland))
+	cmd := exec.Command(os.Args[0], "clipclear", strconv.FormatBool(isWayland))
 	writeToStdin(cmd, copySubject)
 	err := cmd.Start()
 	if err != nil {

core/rcw.go

@@ -2,8 +2,10 @@ package core
 
 import (
 	"os"
+	"os/exec"
 	"strings"
 
+	"github.com/rwinkhart/rcw/daemon"
 	"github.com/rwinkhart/rcw/wrappers"
 )
 
@@ -25,3 +27,22 @@ func EncryptBytes(decBytes []byte, passphrase []byte) []byte {
 	encBytes := wrappers.Encrypt(decBytes, passphrase)
 	return encBytes
 }
+
+// LaunchRCWDProcess launches an RCW daemon to serve the given passphrase.
+func LaunchRCWDProcess(passphrase string) {
+	cmd := exec.Command(os.Args[0], "startrcwd")
+	writeToStdin(cmd, passphrase)
+	err := cmd.Start()
+	if err != nil {
+		PrintError("Failed to launch RCW daemon - Does this libmutton implementation support the \"startrcwd\" argument?", ErrorOther, true)
+	}
+}
+
+// RCWDArgument reads the passphrase from stdin and serves it via an RCW daemon.
+func RCWDArgument() {
+	passphrase := readFromStdin()
+	if passphrase == "" {
+		os.Exit(0)
+	}
+	daemon.Start(string(passphrase))
+}

core/utilitiesMisc.go

@@ -1,6 +1,7 @@
 package core
 
 import (
+	"bufio"
 	"crypto/rand"
 	"fmt"
 	"io"
@@ -59,6 +60,15 @@ func writeToStdin(cmd *exec.Cmd, input string) {
 	}()
 }
 
+// readFromStdin is a utility function that reads a string from stdin.
+func readFromStdin() string {
+	scanner := bufio.NewScanner(os.Stdin)
+	if scanner.Scan() {
+		return scanner.Text()
+	}
+	return ""
+}
+
 // CreateTempFile creates a temporary file and returns a pointer to it.
 func CreateTempFile() *os.File {
 	tempFile, err := os.CreateTemp("", "*.markdown")

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/fortis/go-steam-totp v0.0.0-20171114202746-18e928674727
 	github.com/pkg/sftp v1.13.9
 	github.com/pquerna/otp v1.4.1-0.20231130234153-3357de7c0481
-	github.com/rwinkhart/rcw v0.0.0-20250504183741-f176d57b6ba5
+	github.com/rwinkhart/rcw v0.0.0-20250504233845-9314852f061b
 	golang.design/x/clipboard v0.7.0 // only for Android builds
 	golang.org/x/crypto v0.37.0
 	gopkg.in/ini.v1 v1.67.0
@@ -21,6 +21,11 @@ require (
 	golang.org/x/sys v0.32.0 // indirect
 )
 
+require (
+	github.com/Microsoft/go-winio v0.6.2 // indirect
+	github.com/rwinkhart/peercred-mini v0.0.0-20250407033241-c09add2eceea // indirect
+)
+
 replace golang.org/x/sys => github.com/rwinkhart/sys-freebsd-13-xucred v0.32.0
 
 replace github.com/Microsoft/go-winio => github.com/rwinkhart/go-winio-easy-pipe-handles v0.0.0-20250407031321-96994a0e8410

go.sum

@@ -15,8 +15,12 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/otp v1.4.1-0.20231130234153-3357de7c0481 h1:FkxbO331O7mS5EJkP+MCi0o2gswh/Aezs+//NmefrR8=
 github.com/pquerna/otp v1.4.1-0.20231130234153-3357de7c0481/go.mod h1:dkJfzwRKNiegxyNb54X/3fLwhCynbMspSyWKnvi1AEg=
-github.com/rwinkhart/rcw v0.0.0-20250504183741-f176d57b6ba5 h1:BX31d76TLGZqeukYECLFPkLD+SS/CAV12Lkdlc6UuGM=
-github.com/rwinkhart/rcw v0.0.0-20250504183741-f176d57b6ba5/go.mod h1:giXrq9o5a7bwMSuMvz+5bb2+qbM+zV4pXaG/SceXfLM=
+github.com/rwinkhart/go-winio-easy-pipe-handles v0.0.0-20250407031321-96994a0e8410 h1:NhHwFM3Pgm6zRUfFKvi0p5ndjfFbVWsRwmmhyFlG4PE=
+github.com/rwinkhart/go-winio-easy-pipe-handles v0.0.0-20250407031321-96994a0e8410/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
+github.com/rwinkhart/peercred-mini v0.0.0-20250407033241-c09add2eceea h1:VE2ti/AE4Y3kgnyK+J5c5hpddE+dKHpsFch3K2R6puQ=
+github.com/rwinkhart/peercred-mini v0.0.0-20250407033241-c09add2eceea/go.mod h1:t+YkvAdnTKTrg4d469tw3K+GCUzX/Bja4h8yKjSIsGs=
+github.com/rwinkhart/rcw v0.0.0-20250504233845-9314852f061b h1:eWN9ogSzNE8KcFcoIBgrdgMCOUhxnV7m+SJ9Z3SCnPU=
+github.com/rwinkhart/rcw v0.0.0-20250504233845-9314852f061b/go.mod h1:giXrq9o5a7bwMSuMvz+5bb2+qbM+zV4pXaG/SceXfLM=
 github.com/rwinkhart/sys-freebsd-13-xucred v0.32.0 h1:KRbqimv9Eexf3VB2FrRAQ4v2fGGu7gt3ayMgdT0FNao=
 github.com/rwinkhart/sys-freebsd-13-xucred v0.32.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=