From 48c7a07c428ccd680c23a18f269f3b887439d6d6 Mon Sep 17 00:00:00 2001
From: Alan Somers <asomers@gmail.com>
Date: Sun, 13 Jun 2021 19:42:13 -0600
Subject: Add nmount for FreeBSD.

---
 src/mount/linux.rs | 110 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 src/mount/linux.rs

(limited to 'src/mount/linux.rs')

diff --git a/src/mount/linux.rs b/src/mount/linux.rs
new file mode 100644
index 00000000..edb8afbd
--- /dev/null
+++ b/src/mount/linux.rs
@@ -0,0 +1,110 @@
+use libc::{self, c_ulong, c_int};
+use crate::{Result, NixPath};
+use crate::errno::Errno;
+
+libc_bitflags!(
+    pub struct MsFlags: c_ulong {
+        /// Mount read-only
+        MS_RDONLY;
+        /// Ignore suid and sgid bits
+        MS_NOSUID;
+        /// Disallow access to device special files
+        MS_NODEV;
+        /// Disallow program execution
+        MS_NOEXEC;
+        /// Writes are synced at once
+        MS_SYNCHRONOUS;
+        /// Alter flags of a mounted FS
+        MS_REMOUNT;
+        /// Allow mandatory locks on a FS
+        MS_MANDLOCK;
+        /// Directory modifications are synchronous
+        MS_DIRSYNC;
+        /// Do not update access times
+        MS_NOATIME;
+        /// Do not update directory access times
+        MS_NODIRATIME;
+        /// Linux 2.4.0 - Bind directory at different place
+        MS_BIND;
+        MS_MOVE;
+        MS_REC;
+        MS_SILENT;
+        MS_POSIXACL;
+        MS_UNBINDABLE;
+        MS_PRIVATE;
+        MS_SLAVE;
+        MS_SHARED;
+        MS_RELATIME;
+        MS_KERNMOUNT;
+        MS_I_VERSION;
+        MS_STRICTATIME;
+        MS_LAZYTIME;
+        MS_ACTIVE;
+        MS_NOUSER;
+        MS_RMT_MASK;
+        MS_MGC_VAL;
+        MS_MGC_MSK;
+    }
+);
+
+libc_bitflags!(
+    pub struct MntFlags: c_int {
+        MNT_FORCE;
+        MNT_DETACH;
+        MNT_EXPIRE;
+    }
+);
+
+pub fn mount<P1: ?Sized + NixPath, P2: ?Sized + NixPath, P3: ?Sized + NixPath, P4: ?Sized + NixPath>(
+        source: Option<&P1>,
+        target: &P2,
+        fstype: Option<&P3>,
+        flags: MsFlags,
+        data: Option<&P4>) -> Result<()> {
+
+    fn with_opt_nix_path<P, T, F>(p: Option<&P>, f: F) -> Result<T>
+        where P: ?Sized + NixPath,
+              F: FnOnce(*const libc::c_char) -> T
+    {
+        match p {
+            Some(path) => path.with_nix_path(|p_str| f(p_str.as_ptr())),
+            None => Ok(f(std::ptr::null()))
+        }
+    }
+
+    let res = with_opt_nix_path(source, |s| {
+        target.with_nix_path(|t| {
+            with_opt_nix_path(fstype, |ty| {
+                with_opt_nix_path(data, |d| {
+                    unsafe {
+                        libc::mount(
+                            s,
+                            t.as_ptr(),
+                            ty,
+                            flags.bits,
+                            d as *const libc::c_void
+                        )
+                    }
+                })
+            })
+        })
+    })????;
+
+    Errno::result(res).map(drop)
+}
+
+pub fn umount<P: ?Sized + NixPath>(target: &P) -> Result<()> {
+    let res = target.with_nix_path(|cstr| {
+        unsafe { libc::umount(cstr.as_ptr()) }
+    })?;
+
+    Errno::result(res).map(drop)
+}
+
+pub fn umount2<P: ?Sized + NixPath>(target: &P, flags: MntFlags) -> Result<()> {
+    let res = target.with_nix_path(|cstr| {
+        unsafe { libc::umount2(cstr.as_ptr(), flags.bits) }
+    })?;
+
+    Errno::result(res).map(drop)
+}
-- 
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