internal/prctl: rename prctl wrappers

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/prctl.go

@@ -2,17 +2,22 @@ package internal
 
 import "syscall"
 
-func PR_SET_DUMPABLE__SUID_DUMP_DISABLE() error {
+const (
+	SUID_DUMP_DISABLE = iota
+	SUID_DUMP_USER
+)
+
+func SetDumpable(dumpable uintptr) error {
 	// linux/sched/coredump.h
-	if _, _, errno := syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_DUMPABLE, 0, 0); errno != 0 {
+	if _, _, errno := syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_DUMPABLE, dumpable, 0); errno != 0 {
 		return errno
 	}
 
 	return nil
 }
 
-func PR_SET_PDEATHSIG__SIGKILL() error {
-	if _, _, errno := syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_PDEATHSIG, uintptr(syscall.SIGKILL), 0); errno != 0 {
+func SetPdeathsig(sig syscall.Signal) error {
+	if _, _, errno := syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_PDEATHSIG, uintptr(sig), 0); errno != 0 {
 		return errno
 	}