1 files changed, 13 insertions, 17 deletions
diff --git a/system/tmpfiles.go b/system/tmpfiles.go
index 44d170f6..2850ba22 100644
--- a/system/tmpfiles.go
+++ b/system/tmpfiles.go
@@ -9,20 +9,16 @@ import (
 	"syscall"
 )
 
-// CopyFile registers an Op that copies from src.
-// A buffer is initialised with size cap and the Op faults if bytes read exceed n.
+// CopyFile appends [TmpfileOp] to [I].
 func (sys *I) CopyFile(payload *[]byte, src string, cap int, n int64) *I {
 	buf := new(bytes.Buffer)
 	buf.Grow(cap)
-
-	sys.lock.Lock()
-	sys.ops = append(sys.ops, &Tmpfile{payload, src, n, buf})
-	sys.lock.Unlock()
-
+	sys.ops = append(sys.ops, &TmpfileOp{payload, src, n, buf})
 	return sys
 }
 
-type Tmpfile struct {
+// TmpfileOp reads up to n bytes from src and writes the resulting byte slice to payload.
+type TmpfileOp struct {
 	payload *[]byte
 	src     string
 
@@ -30,8 +26,8 @@ type Tmpfile struct {
 	buf *bytes.Buffer
 }
 
-func (t *Tmpfile) Type() Enablement { return Process }
-func (t *Tmpfile) apply(*I) error {
+func (t *TmpfileOp) Type() Enablement { return Process }
+func (t *TmpfileOp) apply(*I) error {
 	msg.Verbose("copying", t)
 
 	if t.payload == nil {
@@ -59,12 +55,12 @@ func (t *Tmpfile) apply(*I) error {
 	*t.payload = t.buf.Bytes()
 	return nil
 }
-func (t *Tmpfile) revert(*I, *Criteria) error { t.buf.Reset(); return nil }
+func (t *TmpfileOp) revert(*I, *Criteria) error { t.buf.Reset(); return nil }
 
-func (t *Tmpfile) Is(o Op) bool {
-	t0, ok := o.(*Tmpfile)
-	return ok && t0 != nil &&
-		t.src == t0.src && t.n == t0.n
+func (t *TmpfileOp) Is(o Op) bool {
+	target, ok := o.(*TmpfileOp)
+	return ok && t != nil && target != nil &&
+		t.src == target.src && t.n == target.n
 }
-func (t *Tmpfile) Path() string   { return t.src }
-func (t *Tmpfile) String() string { return fmt.Sprintf("up to %d bytes from %q", t.n, t.src) }
+func (t *TmpfileOp) Path() string   { return t.src }
+func (t *TmpfileOp) String() string { return fmt.Sprintf("up to %d bytes from %q", t.n, t.src) }