diff options
Diffstat (limited to 'src/mount/linux.rs')
-rw-r--r-- | src/mount/linux.rs | 110 |
1 files changed, 110 insertions, 0 deletions
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) +} |