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use libc::{self, c_ulong, c_int};
use crate::{Result, NixPath};
use crate::errno::Errno;
libc_bitflags!(
pub struct MsFlags: c_ulong {
MS_RDONLY;
MS_NOSUID;
MS_NODEV;
MS_NOEXEC;
MS_SYNCHRONOUS;
MS_REMOUNT;
MS_MANDLOCK;
MS_DIRSYNC;
MS_NOATIME;
MS_NODIRATIME;
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_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)
}