Remove fake segments from the global Segments array when "unlinking" them.

[thirdparty/squid.git] / compat / shm.cc

#include "config.h"
#include "compat/shm.h"

#if defined(__FreeBSD__) && (__FreeBSD__ >= 7)
#    include <sys/sysctl.h>
#endif


/*
 * Some systems have filesystem-based resources and interpret segment names
 * as file paths. The so-called 'portable' "/name" format does not work well 
 * for them. And, according to Boost::interprocess, recent FreeBSD versions
 * make this decision depending on whether the shm_open() caller is jailed!
 */
bool
shm_portable_segment_name_is_path()
{
#if defined(_SQUID_HPUX_) || defined(_SQUID_OSF_) || defined(__vms) || (defined(_SQUID_FREEBSD_) && (__FreeBSD__ < 7))
	return true;
#elif defined(_SQUID_FREEBSD_)
   int jailed = 0;
   size_t len = sizeof(jailed);
   ::sysctlbyname("security.jail.jailed", &jailed, &len, NULL, 0);
   return !jailed;
#else
    return false;
#endif
}