compat/shm.cc

   1 #include "squid.h"
   2 #include "compat/shm.h"
   3
   4 #if _SQUID_FREEBSD_ && (__FreeBSD__ >= 7)
   5 #include <sys/sysctl.h>
   6 #endif
   7
   8
   9 /*
  10  * Some systems have filesystem-based resources and interpret segment names
  11  * as file paths. The so-called 'portable' "/name" format does not work well
  12  * for them. And, according to Boost::interprocess, recent FreeBSD versions
  13  * make this decision depending on whether the shm_open() caller is jailed!
  14  */
  15 bool
  16 shm_portable_segment_name_is_path()
  17 {
  18 #if _SQUID_HPUX_ || _SQUID_OSF_ || defined(__vms) || (_SQUID_FREEBSD_ && (__FreeBSD__ < 7))
  19     return true;
  20 #elif _SQUID_FREEBSD_
  21     int jailed = 0;
  22     size_t len = sizeof(jailed);
  23     ::sysctlbyname("security.jail.jailed", &jailed, &len, NULL, 0);
  24     return !jailed;
  25 #else
  26     return false;
  27 #endif
  28 }