split out sa_family_t to a bits header

src/header/bits_safamily-t/cbindgen.toml

@@ -0,0 +1,21 @@
+# POSIX header spec: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_socket.h.html
+#
+# The sys/socket header should define this type.
+# It is split out to avoid other headers from including all of sys/socket.
+#
+# POSIX headers that require sa_family_t:
+# - netinet/in.h
+# - sys/socket.h
+# - sys/un.h
+sys_includes = []
+include_guard = "_RELIBC_BITS_SA_FAMILY_T_H"
+language = "C"
+style = "type"
+no_includes = true
+cpp_compat = true
+
+[export]
+include = ["sa_family_t"]
+
+[enum]
+prefix_with_name = true

src/header/bits_safamily-t/mod.rs

@@ -0,0 +1 @@
+pub type sa_family_t = u16;

src/header/mod.rs

@@ -9,6 +9,8 @@ pub mod bits_iovec;
 #[path = "bits_locale-t/mod.rs"]
 pub mod bits_locale_t;
 pub mod bits_pthread;
+#[path = "bits_safamily-t/mod.rs"]
+pub mod bits_safamily_t;
 #[path = "bits_socklen-t/mod.rs"]
 pub mod bits_socklen_t;
 pub mod bits_timespec;

src/header/netdb/mod.rs

@@ -14,13 +14,14 @@ use crate::{
     header::{
         arpa_inet::inet_aton,
         bits_arpainet::{htons, ntohl},
+        bits_safamily_t::sa_family_t,
         bits_socklen_t::socklen_t,
         errno::*,
         fcntl::O_RDONLY,
         netinet_in::{in_addr, sockaddr_in, sockaddr_in6},
         stdlib::atoi,
         strings::strcasecmp,
-        sys_socket::{constants::AF_INET, sa_family_t, sockaddr},
+        sys_socket::{constants::AF_INET, sockaddr},
         unistd::SEEK_SET,
     },
     platform::{

src/header/netinet_in/mod.rs

@@ -5,7 +5,7 @@
 #![allow(non_camel_case_types)]
 
 use crate::{
-    header::sys_socket::{sa_family_t, sockaddr_storage},
+    header::{bits_safamily_t::sa_family_t, sys_socket::sockaddr_storage},
     platform::types::{c_char, c_int},
 };
 

src/header/sys_socket/cbindgen.toml

@@ -2,6 +2,7 @@ sys_includes = ["stddef.h", "stdint.h", "sys/types.h"]
 include_guard = "_RELIBC_SYS_SOCKET_H"
 after_includes = """
 #include <bits/iovec.h> // for iovec from sys/uio.h
+#include <bits/safamily-t.h> // for sa_family_t
 #include <bits/socklen-t.h> // for socklen_t
 """
 trailer = """

src/header/sys_socket/mod.rs

@@ -6,7 +6,7 @@ use core::{mem, ptr};
 
 use crate::{
     error::ResultExt,
-    header::{bits_iovec::iovec, bits_socklen_t::socklen_t},
+    header::{bits_iovec::iovec, bits_safamily_t::sa_family_t, bits_socklen_t::socklen_t},
     platform::{
         PalSocket, Sys,
         types::{
@@ -17,8 +17,6 @@ use crate::{
 
 pub mod constants;
 
-pub type sa_family_t = u16;
-
 /// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_socket.h.html>.
 #[repr(C)]
 #[derive(Default, CheckVsLibcCrate)]

src/header/sys_un/mod.rs

@@ -2,7 +2,7 @@
 //!
 //! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_un.h.html>.
 
-use crate::{header::sys_socket::sa_family_t, platform::types::c_char};
+use crate::{header::bits_safamily_t::sa_family_t, platform::types::c_char};
 
 /// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_un.h.html>.
 #[repr(C)]