msa/VoucherContentSysctl.cpp

   1 //
   2 //  VoucherContentSysctl.cpp
   3 //  system_cmds
   4 //
   5 //  Created by James McIlree on 4/29/14.
   6 //
   7 //
   8
   9 #include "global.h"
  10
  11 VoucherContentSysctl::VoucherContentSysctl(bool is_enabled) :
  12         _original_value(0),
  13         _new_value(is_enabled ? 1 : 0)
  14 {
  15         size_t original_value_size = sizeof(_original_value);
  16         if (sysctlbyname("kern.ipc_voucher_trace_contents", &_original_value, &original_value_size, &_new_value, sizeof(_new_value))) {
  17                 log_msg(ASL_LEVEL_ERR, "Unable to %s kern.ipc_voucher_trace_contents sysctl", is_enabled ? "set" : "clear");
  18         }
  19 }
  20
  21 VoucherContentSysctl::~VoucherContentSysctl() {
  22         if (_original_value != _new_value) {
  23                 if (sysctlbyname("kern.ipc_voucher_trace_contents", NULL, 0, &_original_value, sizeof(_original_value))) {
  24                         log_msg(ASL_LEVEL_ERR, "Unable to restore original value of kern.ipc_voucher_trace_contents sysctl");
  25                 }
  26         }
  27 }