Wails UI

client/uiwails/process/process.go

@@ -0,0 +1,39 @@
+package process
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/shirou/gopsutil/v3/process"
+)
+
+// IsAnotherProcessRunning returns the PID and true if another instance of the
+// same binary is already running for the current OS user.
+func IsAnotherProcessRunning() (int32, bool, error) {
+	processes, err := process.Processes()
+	if err != nil {
+		return 0, false, err
+	}
+
+	pid := os.Getpid()
+	processName := strings.ToLower(filepath.Base(os.Args[0]))
+
+	for _, p := range processes {
+		if int(p.Pid) == pid {
+			continue
+		}
+
+		runningProcessPath, err := p.Exe()
+		if err != nil {
+			continue
+		}
+
+		runningProcessName := strings.ToLower(filepath.Base(runningProcessPath))
+		if runningProcessName == processName && isProcessOwnedByCurrentUser(p) {
+			return p.Pid, true, nil
+		}
+	}
+
+	return 0, false, nil
+}

client/uiwails/process/process_nonwindows.go

@@ -0,0 +1,25 @@
+//go:build !windows
+
+package process
+
+import (
+	"os"
+
+	"github.com/shirou/gopsutil/v3/process"
+	log "github.com/sirupsen/logrus"
+)
+
+func isProcessOwnedByCurrentUser(p *process.Process) bool {
+	currentUserID := os.Getuid()
+	uids, err := p.Uids()
+	if err != nil {
+		log.Errorf("get process uids: %v", err)
+		return false
+	}
+	for _, id := range uids {
+		if int(id) == currentUserID {
+			return true
+		}
+	}
+	return false
+}

client/uiwails/process/process_windows.go

@@ -0,0 +1,24 @@
+package process
+
+import (
+	"os/user"
+
+	"github.com/shirou/gopsutil/v3/process"
+	log "github.com/sirupsen/logrus"
+)
+
+func isProcessOwnedByCurrentUser(p *process.Process) bool {
+	processUsername, err := p.Username()
+	if err != nil {
+		log.Errorf("get process username error: %v", err)
+		return false
+	}
+
+	currUser, err := user.Current()
+	if err != nil {
+		log.Errorf("get current user error: %v", err)
+		return false
+	}
+
+	return processUsername == currUser.Username
+}