66 lines
2.5 KiB
Rust
66 lines
2.5 KiB
Rust
//! Trait for file list catalog
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//!
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//! A file list catalog simply store a directory tree. Such catalogs
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//! may be used as index to do a fast search for files.
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use failure::*;
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use std::convert::TryFrom;
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use std::ffi::CStr;
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#[repr(u8)]
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#[derive(Copy,Clone,PartialEq)]
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pub enum CatalogEntryType {
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Directory = b'd',
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File = b'f',
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Symlink = b'l',
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Hardlink = b'h',
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BlockDevice = b'b',
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CharDevice = b'c',
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Fifo = b'p', // Fifo,Pipe
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Socket = b's',
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}
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impl TryFrom<u8> for CatalogEntryType {
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type Error=Error;
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fn try_from(value: u8) -> Result<Self, Error> {
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Ok(match value {
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b'd' => CatalogEntryType::Directory,
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b'f' => CatalogEntryType::File,
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b'l' => CatalogEntryType::Symlink,
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b'h' => CatalogEntryType::Hardlink,
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b'b' => CatalogEntryType::BlockDevice,
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b'c' => CatalogEntryType::CharDevice,
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b'p' => CatalogEntryType::Fifo,
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b's' => CatalogEntryType::Socket,
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_ => bail!("invalid CatalogEntryType value '{}'", char::from(value)),
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})
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}
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}
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pub trait BackupCatalogWriter {
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fn start_directory(&mut self, name: &CStr) -> Result<(), Error>;
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fn end_directory(&mut self) -> Result<(), Error>;
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fn add_file(&mut self, name: &CStr, size: u64, mtime: u64) -> Result<(), Error>;
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fn add_symlink(&mut self, name: &CStr) -> Result<(), Error>;
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fn add_hardlink(&mut self, name: &CStr) -> Result<(), Error>;
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fn add_block_device(&mut self, name: &CStr) -> Result<(), Error>;
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fn add_char_device(&mut self, name: &CStr) -> Result<(), Error>;
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fn add_fifo(&mut self, name: &CStr) -> Result<(), Error>;
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fn add_socket(&mut self, name: &CStr) -> Result<(), Error>;
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}
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pub struct DummyCatalogWriter();
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impl BackupCatalogWriter for DummyCatalogWriter {
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fn start_directory(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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fn end_directory(&mut self) -> Result<(), Error> { Ok(()) }
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fn add_file(&mut self, _name: &CStr, _size: u64, _mtime: u64) -> Result<(), Error> { Ok(()) }
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fn add_symlink(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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fn add_hardlink(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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fn add_block_device(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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fn add_char_device(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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fn add_fifo(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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fn add_socket(&mut self, _name: &CStr) -> Result<(), Error> { Ok(()) }
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}
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