1 #![allow(missing_docs)]
2 use libc::{self, c_ulong, c_int};
3 use crate::{Result, NixPath};
4 use crate::errno::Errno;
5
6 libc_bitflags!(
7 pub struct MsFlags: c_ulong {
8 /// Mount read-only
9 MS_RDONLY;
10 /// Ignore suid and sgid bits
11 MS_NOSUID;
12 /// Disallow access to device special files
13 MS_NODEV;
14 /// Disallow program execution
15 MS_NOEXEC;
16 /// Writes are synced at once
17 MS_SYNCHRONOUS;
18 /// Alter flags of a mounted FS
19 MS_REMOUNT;
20 /// Allow mandatory locks on a FS
21 MS_MANDLOCK;
22 /// Directory modifications are synchronous
23 MS_DIRSYNC;
24 /// Do not update access times
25 MS_NOATIME;
26 /// Do not update directory access times
27 MS_NODIRATIME;
28 /// Linux 2.4.0 - Bind directory at different place
29 MS_BIND;
30 MS_MOVE;
31 MS_REC;
32 MS_SILENT;
33 MS_POSIXACL;
34 MS_UNBINDABLE;
35 MS_PRIVATE;
36 MS_SLAVE;
37 MS_SHARED;
38 MS_RELATIME;
39 MS_KERNMOUNT;
40 MS_I_VERSION;
41 MS_STRICTATIME;
42 MS_LAZYTIME;
43 MS_ACTIVE;
44 MS_NOUSER;
45 MS_RMT_MASK;
46 MS_MGC_VAL;
47 MS_MGC_MSK;
48 }
49 );
50
51 libc_bitflags!(
52 pub struct MntFlags: c_int {
53 MNT_FORCE;
54 MNT_DETACH;
55 MNT_EXPIRE;
56 }
57 );
58
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<()>59 pub fn mount<P1: ?Sized + NixPath, P2: ?Sized + NixPath, P3: ?Sized + NixPath, P4: ?Sized + NixPath>(
60 source: Option<&P1>,
61 target: &P2,
62 fstype: Option<&P3>,
63 flags: MsFlags,
64 data: Option<&P4>) -> Result<()> {
65
66 fn with_opt_nix_path<P, T, F>(p: Option<&P>, f: F) -> Result<T>
67 where P: ?Sized + NixPath,
68 F: FnOnce(*const libc::c_char) -> T
69 {
70 match p {
71 Some(path) => path.with_nix_path(|p_str| f(p_str.as_ptr())),
72 None => Ok(f(std::ptr::null()))
73 }
74 }
75
76 let res = with_opt_nix_path(source, |s| {
77 target.with_nix_path(|t| {
78 with_opt_nix_path(fstype, |ty| {
79 with_opt_nix_path(data, |d| {
80 unsafe {
81 libc::mount(
82 s,
83 t.as_ptr(),
84 ty,
85 flags.bits,
86 d as *const libc::c_void
87 )
88 }
89 })
90 })
91 })
92 })????;
93
94 Errno::result(res).map(drop)
95 }
96
umount<P: ?Sized + NixPath>(target: &P) -> Result<()>97 pub fn umount<P: ?Sized + NixPath>(target: &P) -> Result<()> {
98 let res = target.with_nix_path(|cstr| {
99 unsafe { libc::umount(cstr.as_ptr()) }
100 })?;
101
102 Errno::result(res).map(drop)
103 }
104
umount2<P: ?Sized + NixPath>(target: &P, flags: MntFlags) -> Result<()>105 pub fn umount2<P: ?Sized + NixPath>(target: &P, flags: MntFlags) -> Result<()> {
106 let res = target.with_nix_path(|cstr| {
107 unsafe { libc::umount2(cstr.as_ptr(), flags.bits) }
108 })?;
109
110 Errno::result(res).map(drop)
111 }
112