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use std::str::FromStr;
/// Known filesystems. Original list from
/// [heim](https://github.com/heim-rs/heim/blob/master/heim-disk/src/filesystem.rs).
///
/// All physical filesystems should have their own enum element and all virtual filesystems will go into
/// the [`FileSystem::Other`] element.
#[derive(Debug, Eq, PartialEq, Hash, Clone)]
#[non_exhaustive]
pub enum FileSystem {
/// ext2 (https://en.wikipedia.org/wiki/Ext2)
Ext2,
/// ext3 (https://en.wikipedia.org/wiki/Ext3)
Ext3,
/// ext4 (https://en.wikipedia.org/wiki/Ext4)
Ext4,
/// FAT (https://en.wikipedia.org/wiki/File_Allocation_Table)
VFat,
/// exFAT (https://en.wikipedia.org/wiki/ExFAT)
ExFat,
/// F2FS (https://en.wikipedia.org/wiki/F2FS)
F2fs,
/// NTFS (https://en.wikipedia.org/wiki/NTFS)
Ntfs,
/// ZFS (https://en.wikipedia.org/wiki/ZFS)
Zfs,
/// HFS (https://en.wikipedia.org/wiki/Hierarchical_File_System)
Hfs,
/// HFS+ (https://en.wikipedia.org/wiki/HFS_Plus)
HfsPlus,
/// JFS (https://en.wikipedia.org/wiki/JFS_(file_system))
Jfs,
/// ReiserFS 3 (https://en.wikipedia.org/wiki/ReiserFS)
Reiser3,
/// ReiserFS 4 (https://en.wikipedia.org/wiki/Reiser4)
Reiser4,
/// Btrfs (https://en.wikipedia.org/wiki/Btrfs)
Btrfs,
/// MINIX FS (https://en.wikipedia.org/wiki/MINIX_file_system)
Minix,
/// NILFS (https://en.wikipedia.org/wiki/NILFS)
Nilfs,
/// XFS (https://en.wikipedia.org/wiki/XFS)
Xfs,
/// APFS (https://en.wikipedia.org/wiki/Apple_File_System)
Apfs,
/// FUSE (https://en.wikipedia.org/wiki/Filesystem_in_Userspace)
FuseBlk,
/// Some unspecified filesystem.
Other(String),
}
impl FileSystem {
/// Checks if filesystem is used for a physical devices.
#[inline]
pub fn is_physical(&self) -> bool {
!self.is_virtual()
}
/// Checks if filesystem is used for a virtual devices (such as `tmpfs` or `smb` mounts).
#[inline]
pub fn is_virtual(&self) -> bool {
matches!(self, FileSystem::Other(..))
}
#[allow(dead_code)]
#[inline]
/// Returns a string literal identifying this filesystem.
pub fn as_str(&self) -> &str {
match self {
FileSystem::Ext2 => "ext2",
FileSystem::Ext3 => "ext3",
FileSystem::Ext4 => "ext4",
FileSystem::VFat => "vfat",
FileSystem::Ntfs => "ntfs",
FileSystem::Zfs => "zfs",
FileSystem::Hfs => "hfs",
FileSystem::Reiser3 => "reiserfs",
FileSystem::Reiser4 => "reiser4",
FileSystem::FuseBlk => "fuseblk",
FileSystem::ExFat => "exfat",
FileSystem::F2fs => "f2fs",
FileSystem::HfsPlus => "hfs+",
FileSystem::Jfs => "jfs",
FileSystem::Btrfs => "btrfs",
FileSystem::Minix => "minix",
FileSystem::Nilfs => "nilfs",
FileSystem::Xfs => "xfs",
FileSystem::Apfs => "apfs",
FileSystem::Other(string) => string.as_str(),
}
}
}
impl FromStr for FileSystem {
type Err = anyhow::Error;
#[inline]
fn from_str(s: &str) -> anyhow::Result<Self> {
// Done like this as `eq_ignore_ascii_case` avoids a string allocation.
Ok(if s.eq_ignore_ascii_case("ext2") {
FileSystem::Ext2
} else if s.eq_ignore_ascii_case("ext3") {
FileSystem::Ext3
} else if s.eq_ignore_ascii_case("ext4") {
FileSystem::Ext4
} else if s.eq_ignore_ascii_case("msdos") || s.eq_ignore_ascii_case("vfat") {
FileSystem::VFat
} else if s.eq_ignore_ascii_case("ntfs3") || s.eq_ignore_ascii_case("ntfs") {
FileSystem::Ntfs
} else if s.eq_ignore_ascii_case("zfs") {
FileSystem::Zfs
} else if s.eq_ignore_ascii_case("hfs") {
FileSystem::Hfs
} else if s.eq_ignore_ascii_case("reiserfs") {
FileSystem::Reiser3
} else if s.eq_ignore_ascii_case("reiser4") {
FileSystem::Reiser4
} else if s.eq_ignore_ascii_case("exfat") {
FileSystem::ExFat
} else if s.eq_ignore_ascii_case("f2fs") {
FileSystem::F2fs
} else if s.eq_ignore_ascii_case("hfsplus") {
FileSystem::HfsPlus
} else if s.eq_ignore_ascii_case("jfs") {
FileSystem::Jfs
} else if s.eq_ignore_ascii_case("btrfs") {
FileSystem::Btrfs
} else if s.eq_ignore_ascii_case("minix") {
FileSystem::Minix
} else if s.eq_ignore_ascii_case("nilfs") {
FileSystem::Nilfs
} else if s.eq_ignore_ascii_case("xfs") {
FileSystem::Xfs
} else if s.eq_ignore_ascii_case("apfs") {
FileSystem::Apfs
} else if s.eq_ignore_ascii_case("fuseblk") {
FileSystem::FuseBlk
} else {
FileSystem::Other(s.to_string())
})
}
}
#[cfg(test)]
mod test {
use super::FileSystem;
use std::str::FromStr;
#[test]
fn file_system_from_str() {
// Something supported
assert_eq!(FileSystem::from_str("ext4").unwrap(), FileSystem::Ext4);
assert_eq!(FileSystem::from_str("msdos").unwrap(), FileSystem::VFat);
assert_eq!(FileSystem::from_str("vfat").unwrap(), FileSystem::VFat);
// Something unsupported
assert_eq!(
FileSystem::from_str("this does not exist").unwrap(),
FileSystem::Other("this does not exist".to_owned())
);
}
}
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