Add process_name/package_name/user/user_id rule item

common/process/searcher_with_name.go

@@ -0,0 +1,25 @@
+//go:build cgo && linux && !android
+
+package process
+
+import (
+	"context"
+	"net/netip"
+	"os/user"
+
+	F "github.com/sagernet/sing/common/format"
+)
+
+func FindProcessInfo(searcher Searcher, ctx context.Context, network string, srcIP netip.Addr, srcPort int) (*Info, error) {
+	info, err := searcher.FindProcessInfo(ctx, network, srcIP, srcPort)
+	if err != nil {
+		return nil, err
+	}
+	if info.UserId != -1 {
+		osUser, _ := user.LookupId(F.ToString(info.UserId))
+		if osUser != nil {
+			info.User = osUser.Username
+		}
+	}
+	return info, nil
+}