split out off_t from sys_types_internal

src/header/bits_off-t/cbindgen.toml

@@ -0,0 +1,21 @@
+# POSIX header spec: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_types.h.html
+#
+# This type is split out to prevent importing all of sys/types.h into other headers.
+#
+# POSIX headers that require off_t:
+# - fcntl.h
+# - stdio.h
+# - sys/mman.h
+# - sys/stat.h
+# - sys/types.h (where it should be defined)
+# - unistd.h
+sys_includes = []
+include_guard = "_RELIBC_BITS_OFF_T_H"
+language = "C"
+style = "type"
+no_includes = true
+cpp_compat = true
+[export]
+include = ["off_t"]
+[enum]
+prefix_with_name = true

src/header/bits_off-t/mod.rs

@@ -0,0 +1,5 @@
+use crate::platform::types::c_longlong;
+
+/// Used for file sizes.
+#[allow(non_camel_case_types)]
+pub type off_t = c_longlong;

src/header/mod.rs

@@ -8,6 +8,8 @@ pub mod bits_arpainet;
 pub mod bits_iovec;
 #[path = "bits_locale-t/mod.rs"]
 pub mod bits_locale_t;
+#[path = "bits_off-t/mod.rs"]
+pub mod bits_off_t;
 pub mod bits_pthread;
 #[path = "bits_safamily-t/mod.rs"]
 pub mod bits_safamily_t;

src/header/sys_types_internal/cbindgen.toml

@@ -2,6 +2,7 @@
 sys_includes = ["stddef.h"]
 # TODO: figure out how to export void* type
 after_includes = """
+#include <bits/off-t.h>
 #include <bits/ssize-t.h>
 #include <bits/suseconds-t.h>
 #include <bits/time-t.h>
@@ -23,7 +24,6 @@ include = [
   "uid_t",
   "mode_t",
   "nlink_t",
-  "off_t",
   "pid_t",
   "id_t",
   "useconds_t",

src/header/sys_types_internal/mod.rs

@@ -8,7 +8,7 @@
 //! for the old specification.
 
 pub use crate::header::{
-    bits_ssize_t::ssize_t, bits_suseconds_t::suseconds_t, bits_time_t::time_t,
+    bits_off_t::off_t, bits_ssize_t::ssize_t, bits_suseconds_t::suseconds_t, bits_time_t::time_t,
 };
 use crate::platform::types::{
     c_char, c_int, c_long, c_longlong, c_uchar, c_uint, c_ulong, c_ulonglong, c_ushort,
@@ -34,8 +34,6 @@ pub type mode_t = c_uint;
 pub type mode_t = c_int;
 /// Used for link counts.
 pub type nlink_t = c_ulong;
-/// Used for file sizes.
-pub type off_t = c_longlong;
 /// Used for process IDs and process group IDs.
 pub type pid_t = c_int;
 /// Used as a general identifier; can be used to contain at least a pid_t, uid_t, or gid_t.