__const char *__remuser, __const char *__locuser,
sa_family_t __af);
+/* Check whether user REMUSER on system indicated by IPv4 address
+ RADDR is allowed to login as LOCUSER. Non-IPv4 (e.g., IPv6) are
+ not supported. If SUSER is not zero the user tries to become
+ superuser. Return 0 if it is possible.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern int iruserok (uint32_t __raddr, int __suser,
+ __const char *__remuser, __const char *__locuser);
+
+/* This is the equivalent function where the pfamiliy if the address
+ pointed to by RADDR is determined by the value of AF. It therefore
+ can be used for IPv6
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern int iruserok_af (__const void *__raddr, int __suser,
+ __const char *__remuser, __const char *__locuser,
+ sa_family_t __af);
+
/* Try to allocate reserved port, returning a descriptor for a socket opened
at this port or -1 if unsuccessful. The search for an available port
will start at ALPORT and continues with lower numbers.