Define `MntFlags` and `unmount` on all of the BSDs.

5 files changed, 51 insertions, 97 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index de01c2f7..5c3a3d1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## [Unreleased] - ReleaseDate
 ### Added
 
+- Add `MntFlags` and `unmount` on all of the BSDs.
+  ([#1849](https://github.com/nix-rust/nix/pull/1849))
 - Added `NSFS_MAGIC` FsType on Linux and Android.
   ([#1829](https://github.com/nix-rust/nix/pull/1829))
 - Added `sched_getcpu` on platforms that support it.
diff --git a/Cargo.toml b/Cargo.toml
index 2edb003b..e09f758a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ targets = [
 ]
 
 [dependencies]
-libc = { version = "0.2.135", features = [ "extra_traits" ] }
+libc = { git = "https://github.com/rust-lang/libc", rev = "cc19b6f0801", features = [ "extra_traits" ] }
 bitflags = "1.1"
 cfg-if = "1.0"
 pin-utils = { version = "0.1.0", optional = true }
diff --git a/src/lib.rs b/src/lib.rs
index 770258dd..6b821257 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -106,7 +106,6 @@ feature! {
     #[allow(missing_docs)]
     pub mod kmod;
 }
-#[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))]
 feature! {
     #![feature = "mount"]
     pub mod mount;
diff --git a/src/mount/bsd.rs b/src/mount/bsd.rs
index 109522f9..1ba8b809 100644
--- a/src/mount/bsd.rs
+++ b/src/mount/bsd.rs
@@ -1,16 +1,22 @@
+#[cfg(target_os = "freebsd")]
 use crate::{
     Error,
+};
+use crate::{
     Errno,
     NixPath,
     Result,
 };
-use libc::{c_char, c_int, c_uint, c_void};
+#[cfg(target_os = "freebsd")]
+use libc::{c_char, c_uint, c_void};
+use libc::c_int;
+#[cfg(target_os = "freebsd")]
 use std::{
     borrow::Cow,
     ffi::{CString, CStr},
+    marker::PhantomData,
     fmt,
     io,
-    marker::PhantomData,
 };
 
 
@@ -110,12 +116,14 @@ libc_bitflags!(
 ///
 /// It wraps an [`Errno`], but also may contain an additional message returned
 /// by `nmount(2)`.
+#[cfg(target_os = "freebsd")]
 #[derive(Debug)]
 pub struct NmountError {
     errno: Error,
     errmsg: Option<String>
 }
 
+#[cfg(target_os = "freebsd")]
 impl NmountError {
     /// Returns the additional error string sometimes generated by `nmount(2)`.
     pub fn errmsg(&self) -> Option<&str> {
@@ -135,8 +143,10 @@ impl NmountError {
     }
 }
 
+#[cfg(target_os = "freebsd")]
 impl std::error::Error for NmountError {}
 
+#[cfg(target_os = "freebsd")]
 impl fmt::Display for NmountError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         if let Some(errmsg) = &self.errmsg {
@@ -147,6 +157,7 @@ impl fmt::Display for NmountError {
     }
 }
 
+#[cfg(target_os = "freebsd")]
 impl From<NmountError> for io::Error {
     fn from(err: NmountError) -> Self {
         err.errno.into()
@@ -154,6 +165,7 @@ impl From<NmountError> for io::Error {
 }
 
 /// Result type of [`Nmount::nmount`].
+#[cfg(target_os = "freebsd")]
 pub type NmountResult = std::result::Result<(), NmountError>;
 
 /// Mount a FreeBSD file system.
@@ -425,13 +437,15 @@ impl<'a> Drop for Nmount<'a> {
 ///
 /// Useful flags include
 /// * `MNT_FORCE` -     Unmount even if still in use.
-/// * `MNT_BYFSID` -    `mountpoint` is not a path, but a file system ID
-///                     encoded as `FSID:val0:val1`, where `val0` and `val1`
-///                     are the contents of the `fsid_t val[]` array in decimal.
-///                     The file system that has the specified file system ID
-///                     will be unmounted.  See
-///                     [`statfs`](crate::sys::statfs::statfs) to determine the
-///                     `fsid`.
+#[cfg_attr(target_os = "freebsd", doc = "
+* `MNT_BYFSID` -    `mountpoint` is not a path, but a file system ID
+                    encoded as `FSID:val0:val1`, where `val0` and `val1`
+                    are the contents of the `fsid_t val[]` array in decimal.
+                    The file system that has the specified file system ID
+                    will be unmounted.  See
+                    [`statfs`](crate::sys::statfs::statfs) to determine the
+                    `fsid`.
+")]
 pub fn unmount<P>(mountpoint: &P, flags: MntFlags) -> Result<()>
     where P: ?Sized + NixPath
 {
diff --git a/src/sys/statfs.rs b/src/sys/statfs.rs
index a302b4e8..acbc75cd 100644
--- a/src/sys/statfs.rs
+++ b/src/sys/statfs.rs
@@ -422,7 +422,9 @@ impl Statfs {
         target_os = "macos",
         target_os = "android",
         target_os = "freebsd",
+        target_os = "fuchsia",
         target_os = "openbsd",
+        target_os = "linux",
     ))]
     #[cfg_attr(docsrs, doc(cfg(all())))]
     pub fn blocks(&self) -> u64 {
@@ -437,24 +439,9 @@ impl Statfs {
     }
 
     /// Total data blocks in filesystem
-    #[cfg(all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32"))))]
+    #[cfg(target_os = "emscripten")]
     #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn blocks(&self) -> u64 {
-        self.0.f_blocks
-    }
-
-    /// Total data blocks in filesystem
-    #[cfg(not(any(
-        target_os = "ios",
-        target_os = "macos",
-        target_os = "android",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "dragonfly",
-        all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32")))
-    )))]
-    #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn blocks(&self) -> libc::c_ulong {
+    pub fn blocks(&self) -> u32 {
         self.0.f_blocks
     }
 
@@ -464,7 +451,9 @@ impl Statfs {
         target_os = "macos",
         target_os = "android",
         target_os = "freebsd",
+        target_os = "fuchsia",
         target_os = "openbsd",
+        target_os = "linux",
     ))]
     #[cfg_attr(docsrs, doc(cfg(all())))]
     pub fn blocks_free(&self) -> u64 {
@@ -479,29 +468,20 @@ impl Statfs {
     }
 
     /// Free blocks in filesystem
-    #[cfg(all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32"))))]
+    #[cfg(target_os = "emscripten")]
     #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn blocks_free(&self) -> u64 {
+    pub fn blocks_free(&self) -> u32 {
         self.0.f_bfree
     }
 
-    /// Free blocks in filesystem
-    #[cfg(not(any(
+    /// Free blocks available to unprivileged user
+    #[cfg(any(
         target_os = "ios",
         target_os = "macos",
         target_os = "android",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "dragonfly",
-        all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32")))
-    )))]
-    #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn blocks_free(&self) -> libc::c_ulong {
-        self.0.f_bfree
-    }
-
-    /// Free blocks available to unprivileged user
-    #[cfg(any(target_os = "ios", target_os = "macos", target_os = "android"))]
+        target_os = "fuchsia",
+        target_os = "linux",
+    ))]
     #[cfg_attr(docsrs, doc(cfg(all())))]
     pub fn blocks_available(&self) -> u64 {
         self.0.f_bavail
@@ -522,24 +502,9 @@ impl Statfs {
     }
 
     /// Free blocks available to unprivileged user
-    #[cfg(all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32"))))]
+    #[cfg(target_os = "emscripten")]
     #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn blocks_available(&self) -> u64 {
-        self.0.f_bavail
-    }
-
-    /// Free blocks available to unprivileged user
-    #[cfg(not(any(
-        target_os = "ios",
-        target_os = "macos",
-        target_os = "android",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "dragonfly",
-        all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32")))
-    )))]
-    #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn blocks_available(&self) -> libc::c_ulong {
+    pub fn blocks_available(&self) -> u32 {
         self.0.f_bavail
     }
 
@@ -549,7 +514,9 @@ impl Statfs {
         target_os = "macos",
         target_os = "android",
         target_os = "freebsd",
+        target_os = "fuchsia",
         target_os = "openbsd",
+        target_os = "linux",
     ))]
     #[cfg_attr(docsrs, doc(cfg(all())))]
     pub fn files(&self) -> u64 {
@@ -564,33 +531,20 @@ impl Statfs {
     }
 
     /// Total file nodes in filesystem
-    #[cfg(all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32"))))]
+    #[cfg(target_os = "emscripten")]
     #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn files(&self) -> libc::fsfilcnt_t {
+    pub fn files(&self) -> u32 {
         self.0.f_files
     }
 
-    /// Total file nodes in filesystem
-    #[cfg(not(any(
+    /// Free file nodes in filesystem
+    #[cfg(any(
         target_os = "ios",
         target_os = "macos",
         target_os = "android",
-        target_os = "freebsd",
+        target_os = "fuchsia",
         target_os = "openbsd",
-        target_os = "dragonfly",
-        all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32")))
-    )))]
-    #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn files(&self) -> libc::c_ulong {
-        self.0.f_files
-    }
-
-    /// Free file nodes in filesystem
-    #[cfg(any(
-            target_os = "android",
-            target_os = "ios",
-            target_os = "macos",
-            target_os = "openbsd"
+        target_os = "linux",
     ))]
     #[cfg_attr(docsrs, doc(cfg(all())))]
     pub fn files_free(&self) -> u64 {
@@ -612,24 +566,9 @@ impl Statfs {
     }
 
     /// Free file nodes in filesystem
-    #[cfg(all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32"))))]
-    #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn files_free(&self) -> libc::fsfilcnt_t {
-        self.0.f_ffree
-    }
-
-    /// Free file nodes in filesystem
-    #[cfg(not(any(
-        target_os = "ios",
-        target_os = "macos",
-        target_os = "android",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "dragonfly",
-        all(target_os = "linux", any(target_env = "musl", target_arch = "riscv32", all(target_arch = "x86_64", target_pointer_width = "32")))
-    )))]
+    #[cfg(target_os = "emscripten")]
     #[cfg_attr(docsrs, doc(cfg(all())))]
-    pub fn files_free(&self) -> libc::c_ulong {
+    pub fn files_free(&self) -> u32 {
         self.0.f_ffree
     }