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use std::borrow::Cow;
use std::collections::HashMap;
use std::ffi::OsStr;
use std::path::Path;
use std::path::PathBuf;
use std::future::Future;
use std::future::IntoFuture;
use futures::FutureExt;
use udev::Enumerator;
use crate::device::serial::SerialNumber;
use crate::error::Error;
use crate::device::Device;
#[derive(Debug, Clone)]
pub struct Volume {
/// FS mount point.
path: PathBuf,
/// Partition node path, e.g.: `/dev/sda1`.
part_node: PathBuf,
/// Disk node path, e.g.: `/dev/sda`.
disk_node: PathBuf,
/// Device sysfs path.
dev_sysfs: PathBuf,
}
impl Volume {
pub fn new(path: PathBuf, part: PathBuf, disk: PathBuf, dev_sysfs: PathBuf) -> Self {
Self { path,
part_node: part,
disk_node: disk,
dev_sysfs }
}
}
impl std::fmt::Display for Volume {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { self.path.display().fmt(f) }
}
impl Volume {
/// This volume's path.
pub fn path(&self) -> Cow<'_, Path> { self.path.as_path().into() }
}
pub mod unmount {
use futures::TryFutureExt;
use super::*;
use crate::mount::Unmount;
use crate::mount::UnmountAsync;
impl Unmount for Volume {
#[cfg_attr(feature = "tracing", tracing::instrument())]
fn unmount_blocking(&self) -> Result<(), Error> {
use std::process::Command;
let res =
unmount_eject(&self).or_else(|err| {
eject(self).status()
.map_err(Error::from)
.and_then(|res| res.exit_ok().map_err(Error::from))
.map_err(|err2| Error::chain(err2, [err]))
})
.or_else(|err| -> Result<(), Error> {
unmount(self).status()
.map_err(Error::from)
.and_then(|res| res.exit_ok().map_err(Error::from))
.map_err(|err2| Error::chain(err2, [err]))
})
.or_else(move |err| -> Result<(), Error> {
udisksctl_unmount(self).status()
.map_err(Error::from)
.and_then(|res| res.exit_ok().map_err(Error::from))
.map_err(|err2| Error::chain(err2, [err]))
})
.or_else(move |err| -> Result<(), Error> {
udisks_unmount(self).status()
.map_err(Error::from)
.and_then(|res| res.exit_ok().map_err(Error::from))
.map_err(|err2| Error::chain(err2, [err]))
})
.inspect(|_| trace!("unmounted {self}"));
// TODO: use `udisks_power_off` also as fallback for `udisksctl_power_off`:
Command::from(udisksctl_power_off(self)).status()
.map_err(Error::from)
.and_then(|res| res.exit_ok().map_err(Error::from))
.map_err(move |err2| {
if let Some(err) = res.err() {
Error::chain(err2, [err])
} else {
err2
}
})
}
}
impl UnmountAsync for Volume {
#[cfg_attr(feature = "tracing", tracing::instrument())]
async fn unmount(&self) -> Result<(), Error> {
use futures_lite::future::ready;
#[cfg(all(feature = "tokio", not(feature = "async-std")))]
use tokio::process::Command;
#[cfg(feature = "async-std")]
use async_std::process::Command;
async { unmount_eject(&self) }.or_else(|err| {
Command::from(eject(self)).status()
.map_err(|err2| Error::chain(err2, [err]))
.and_then(|res| {
ready(res.exit_ok().map_err(Error::from))
})
})
.or_else(|err| {
Command::from(unmount(self)).status()
.map_err(|err2| Error::chain(err2, [err]))
.and_then(|res| {
ready(res.exit_ok().map_err(Error::from))
})
})
.or_else(|err| {
Command::from(udisksctl_unmount(self)).status()
.map_err(|err2| {
Error::chain(err2, [err])
})
.and_then(|res| {
ready(
res.exit_ok()
.map_err(Error::from),
)
})
})
.or_else(|err| {
Command::from(udisks_unmount(self)).status()
.map_err(|err2| {
Error::chain(err2, [err])
})
.and_then(|res| {
ready(
res.exit_ok()
.map_err(Error::from),
)
})
})
.inspect_ok(|_| trace!("unmounted {self}"))
.then(|res| {
// TODO: use `udisks_power_off` also as fallback for `udisksctl_power_off`:
Command::from(udisksctl_power_off(self)).status()
.map_err(Error::from)
.and_then(|res| {
ready(
res.exit_ok()
.map_err(Error::from),
)
})
.map_err(|err2| {
if let Some(err) = res.err()
{
Error::chain(err2, [err])
} else {
err2
}
})
})
.await
}
}
#[cfg_attr(feature = "tracing", tracing::instrument())]
pub fn unmount_eject(vol: &Volume) -> Result<(), Error> {
use eject::device::Device;
let drive = Device::open(&vol.disk_node).map_err(std::io::Error::from)?;
drive.eject().map_err(std::io::Error::from)?;
trace!("Ejected {}", &vol.disk_node.display());
Ok(())
}
fn eject(vol: &Volume) -> std::process::Command {
let mut cmd = std::process::Command::new("eject");
cmd.arg(vol.path().as_ref());
cmd
}
fn unmount(vol: &Volume) -> std::process::Command {
let mut cmd = std::process::Command::new("umount");
cmd.arg(vol.path().as_ref());
cmd
}
fn udisksctl_unmount(vol: &Volume) -> std::process::Command {
let mut cmd = std::process::Command::new("udisksctl");
cmd.args(["unmount", "--no-user-interaction", "-b"]);
cmd.arg(&vol.part_node);
cmd
}
fn udisksctl_power_off(vol: &Volume) -> std::process::Command {
let mut cmd = std::process::Command::new("udisksctl");
cmd.args(["power-off", "--no-user-interaction", "-b"]);
cmd.arg(&vol.disk_node);
cmd
}
fn udisks_unmount(vol: &Volume) -> std::process::Command {
let mut cmd = std::process::Command::new("udisks");
cmd.arg("--unmount");
cmd.arg(&vol.part_node);
cmd
}
fn udisks_power_off(vol: &Volume) -> std::process::Command {
let mut cmd = std::process::Command::new("udisks");
cmd.arg("--detach");
cmd.arg(&vol.disk_node);
cmd
}
// NOTE: mb. try to use `udisks`, that's existing in Ubuntu.
// udisksctl unmount -b /dev/sdc1 && udisksctl power-off -b /dev/sdc
// udisks --unmount /dev/sdb1 && udisks --detach /dev/sdb
}
#[cfg_attr(feature = "tracing", tracing::instrument(fields(dev = dev.as_ref().serial_number())))]
pub async fn volume_for<Info>(dev: Info) -> Result<Volume, Error>
where Info: AsRef<nusb::DeviceInfo> {
let sysfs = dev.as_ref().sysfs_path();
let mut enumerator = enumerator()?;
enumerator.add_syspath(sysfs)?;
if let Some(sn) = dev.as_ref().serial_number() {
enumerator.match_property("ID_SERIAL_SHORT", sn)?;
}
let mounts = lfs_core::read_mountinfo()?;
enumerator.scan_devices()?
.filter_map(|udev| {
udev.devtype()
.filter(|ty| *ty == OsStr::new("partition"))
.is_some()
.then(move || udev.devnode().map(Path::to_path_buf).map(|node| (udev, node)))
})
.flatten()
.find_map(|(udev, node)| {
mounts.iter()
.find(|inf| Path::new(inf.fs.as_str()) == node.as_path())
.map(|inf| (udev, node, inf))
})
.and_then(|(udev, node, minf)| {
let disk = udev.parent()
.filter(is_disk)
.or_else(|| udev.parent().map(|d| d.parent().filter(is_disk)).flatten())
.and_then(|dev| dev.devnode().map(ToOwned::to_owned));
let sysfs = PathBuf::from(sysfs);
disk.map(move |disk| Volume::new(minf.mount_point.clone(), node, disk, sysfs))
})
.ok_or_else(|| Error::not_found())
}
#[cfg_attr(feature = "tracing", tracing::instrument(skip(devs)))]
pub async fn volumes_for_map<I>(devs: I) -> Result<HashMap<Device, Option<Volume>>, Error>
where I: IntoIterator<Item = Device> {
let mounts = lfs_core::read_mountinfo()?;
if mounts.is_empty() {
return Ok(devs.into_iter().map(|dev| (dev, None)).collect());
}
let mut enumerator = enumerator()?;
let udevs: Vec<_> = enumerator.scan_devices()?
.filter(is_partition)
.filter_map(|dev| {
if let Some(sn) = dev.property_value("ID_SERIAL_SHORT") {
let sn = sn.to_string_lossy().to_string();
Some((dev, sn))
} else {
if let Some(sn) = dev.property_value("ID_SERIAL") {
let sn: Result<SerialNumber, _> =
sn.to_string_lossy().as_ref().try_into();
sn.ok().map(|sn| (dev, sn.to_string()))
} else {
None
}
}
})
.collect();
if udevs.is_empty() {
return Ok(devs.into_iter().map(|dev| (dev, None)).collect());
}
let mut devs = devs.into_iter().filter_map(|dev| {
if let Some(sn) = dev.info().serial_number().map(ToOwned::to_owned) {
Some((dev, sn))
} else {
None
}
});
let result =
devs.map(|(dev, ref sna)| {
let node =
udevs.iter()
.find_map(|(inf, snb)| {
(sna == snb).then(|| inf.devnode())
.flatten()
.map(ToOwned::to_owned)
.map(|dn| (inf, dn))
})
.and_then(|(udev, node)| {
mounts.iter()
.find(|inf| Path::new(inf.fs.as_str()) == node)
.and_then(|inf| {
let disk = udev.parent()
.filter(is_disk)
.or_else(|| udev.parent().map(|d| d.parent().filter(is_disk)).flatten())
.and_then(|dev| dev.devnode().map(ToOwned::to_owned));
let sysfs = dev.info().sysfs_path().to_owned();
disk.map(move |disk| Volume::new(inf.mount_point.clone(), node, disk, sysfs))
})
});
(dev, node)
})
.collect();
Ok(result)
}
// TODO: this is needed too:
// pub fn volumes_for<'i, I: 'i>(
// devs: I)
// -> Result<impl Iterator<Item = (impl Future<Output = Result<PathBuf, Error>>, &'i Device)>, Error>
// where I: IntoIterator<Item = &'i Device> {
// //
// Ok(vec![(futures::future::lazy(|_| todo!()).into_future(), &todo!())].into_iter())
// }
fn enumerator() -> Result<Enumerator, Error> {
let mut enumerator = udev::Enumerator::new()?;
// filter only PD devices:
enumerator.match_property("ID_VENDOR", "Panic")?;
enumerator.match_property("ID_MODEL", "Playdate")?;
Ok(enumerator)
}
fn is_partition(dev: &udev::Device) -> bool {
dev.devtype()
.filter(|ty| *ty == OsStr::new("partition"))
.is_some()
}
fn is_disk(dev: &udev::Device) -> bool { dev.devtype().filter(|ty| *ty == OsStr::new("disk")).is_some() }