int cnt;
size_t cnt;
__opensock (void){  static int last_family;	/* Available socket family we will use.  */  static int last_type;  static const struct  {    int family;    const char procname[15];  } afs[] =    {      /* The 2.2 kernels cannot handle ioctl(SIOCGIFCONF) on AF_UNIX sockets.	 Give the kernel a chance to user inet sockets on old kernels.  */#if __LINUX_KERNEL_VERSION < 132096      { AF_INET, "" },      { AF_UNIX, "net/unix" },#else      { AF_UNIX, "net/unix" },      { AF_INET, "" },#endif      { AF_INET6, "net/if_inet6" },      { AF_AX25, "net/ax25" },      { AF_NETROM, "net/nr" },      { AF_ROSE, "net/rose" },      { AF_IPX, "net/ipx" },      { AF_APPLETALK, "net/appletalk" },      { AF_ECONET, "sys/net/econet" },      { AF_ASH, "sys/net/ash" },      { AF_X25, "net/x25" }    };#define nafs (sizeof (afs) / sizeof (afs[0]))  char fname[sizeof "/proc/" + 14];  int result;  int has_proc;  int cnt;  /* We already know which family to use from the last call.  Use it     again.  */  if (last_family != 0)    {      assert (last_type != 0);      result = __socket (last_family, last_type, 0);      if (result != -1 || errno != EAFNOSUPPORT)	/* Maybe the socket type isn't supported anymore (module is	   unloaded).  In this case again try to find the type.  */	return result;      /* Reset the values.  They seem not valid anymore.  */      last_family = 0;      last_type = 0;    }  /* Check whether the /proc filesystem is available.  */  has_proc = __access ("/proc/net", R_OK) != -1;  strcpy (fname, "/proc/");  /* Iterate over the interface families and find one which is     available.  */  for (cnt = 0; cnt < nafs; ++cnt)    {      int type = SOCK_DGRAM;      if (has_proc && afs[cnt].procname[0] != '\0')	{	  strcpy (fname + 6, afs[cnt].procname);	  if (__access (fname, R_OK) == -1)	    /* The /proc entry is not available.  I.e., we cannot	       create a socket of this type (without loading the	       module).  Don't look for it since this might trigger	       loading the module.  */	    continue;	}      if (afs[cnt].family == AF_NETROM || afs[cnt].family == AF_X25)	type = SOCK_SEQPACKET;      result = __socket (afs[cnt].family, type, 0);      if (result != -1)	{	  /* Found an available family.  */	  last_type = type;	  last_family = afs[cnt].family;	  return result;	}    }  /* None of the protocol families is available.  It is unclear what kind     of error is returned.  ENOENT seems like a reasonable choice.  */  __set_errno (ENOENT);  return -1;}