Returns the segment data of segment with the given segment name.

Returns the segment data of the given segment in the image pointed to by the given mach header.

void main()
{
     import core.sys.darwin.mach.getsect;
     import core.sys.darwin.crt_externs;

     auto mph = _NSGetMachExecuteHeader();
     int size;
     assert(getsegmentdata(mph, "__TEXT", &size));
     assert(size > 0);
}