Add process_name/package_name/user/user_id rule item

common/process/searcher_linux.go

@@ -0,0 +1,35 @@
+//go:build linux && !android
+
+package process
+
+import (
+	"context"
+	"net/netip"
+
+	"github.com/sagernet/sing-box/log"
+)
+
+var _ Searcher = (*linuxSearcher)(nil)
+
+type linuxSearcher struct {
+	logger log.ContextLogger
+}
+
+func NewSearcher(logger log.ContextLogger) (Searcher, error) {
+	return &linuxSearcher{logger}, nil
+}
+
+func (s *linuxSearcher) FindProcessInfo(ctx context.Context, network string, srcIP netip.Addr, srcPort int) (*Info, error) {
+	inode, uid, err := resolveSocketByNetlink(network, srcIP, srcPort)
+	if err != nil {
+		return nil, err
+	}
+	processPath, err := resolveProcessNameByProcSearch(inode, uid)
+	if err != nil {
+		s.logger.DebugContext(ctx, "find process path: ", err)
+	}
+	return &Info{
+		UserId:      uid,
+		ProcessPath: processPath,
+	}, nil
+}