Added helpers for sup and ptrace syscalls

Signed-off-by: GLVS Kiriti <glvskiriti2003369@gmail.com>

Author: GLVSKiriti

pkg/declarative/helpers.go

@@ -112,3 +112,15 @@ func SymlinkSyscall(oldpath string, newpath string) error {
 func LinkSyscall(oldpath string, newpath string) error {
 	return unix.Link(oldpath, newpath)
 }
+
+func DupSyscall(oldfd int) (int, error) {
+	newfd, err := unix.Dup(oldfd)
+	if err != nil {
+		return -1, err
+	}
+	return newfd, nil
+}
+
+func PtraceSyscall(pid int, signal int) error {
+	return unix.PtraceSyscall(pid, signal)
+}

pkg/declarative/host.go

@@ -75,6 +75,16 @@ func (r *Hostrunner) ExecuteStep(ctx context.Context, test Test) error {
 			if err != nil {
 				return fmt.Errorf("link syscall failed with error: %v", err)
 			}
+		case "dup":
+			_, err := DupSyscall(*step.Args.Oldfd)
+			if err != nil {
+				return fmt.Errorf("dup syscall failed with error: %v", err)
+			}
+		case "ptrace":
+			err := PtraceSyscall(*step.Args.Pid, *step.Args.Ptracesignal)
+			if err != nil {
+				return fmt.Errorf("ptrace syscall failed with error: %v", err)
+			}
 		default:
 			return fmt.Errorf("unsupported syscall: %s", step.Syscall)
 		}

pkg/declarative/yamltypes.go

@@ -42,6 +42,13 @@ type Args struct {
 	// For symlink and link syscalls
 	Oldpath *string `yaml:"oldpath,omitempty"`
 	Newpath *string `yaml:"newpath,omitempty"`
+
+	// For dup syscall
+	Oldfd *int `yaml:"oldfd,omitempty"`
+
+	// For ptrace syscall
+	Pid          *int `yaml:"pid,omitempty"`
+	Ptracesignal *int `yaml:"ptracesignal,omitempty"`
 }
 
 type SyscallStep struct {