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//! See https://www.kernel.org/pub/linux/utils/util-linux/v2.21/libblkid-docs/index.html //! for the reference manual to the FFI bindings extern crate blkid_sys; extern crate errno; extern crate libc; use std::error::Error as err; use std::ffi::{CStr, CString, IntoStringError, NulError}; use std::fmt; use std::io::Error; use std::path::Path; use std::ptr; use std::string::FromUtf8Error; use blkid_sys::*; use errno::errno; /// Custom error handling for the library #[derive(Debug)] pub enum BlkidError { FromUtf8Error(FromUtf8Error), NulError(NulError), Error(String), IoError(Error), IntoStringError(IntoStringError), } impl fmt::Display for BlkidError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str(self.description()) } } impl err for BlkidError { fn description(&self) -> &str { match *self { BlkidError::FromUtf8Error(ref e) => e.description(), BlkidError::NulError(ref e) => e.description(), BlkidError::Error(ref e) => &e, BlkidError::IoError(ref e) => e.description(), BlkidError::IntoStringError(ref e) => e.description(), } } fn cause(&self) -> Option<&err> { match *self { BlkidError::FromUtf8Error(ref e) => e.cause(), BlkidError::NulError(ref e) => e.cause(), BlkidError::Error(_) => None, BlkidError::IoError(ref e) => e.cause(), BlkidError::IntoStringError(ref e) => e.cause(), } } } impl BlkidError { /// Create a new BlkidError with a String message fn new(err: String) -> BlkidError { BlkidError::Error(err) } /// Convert a BlkidError into a String representation. pub fn to_string(&self) -> String { match *self { BlkidError::FromUtf8Error(ref err) => err.utf8_error().to_string(), BlkidError::NulError(ref err) => err.description().to_string(), BlkidError::Error(ref err) => err.to_string(), BlkidError::IoError(ref err) => err.description().to_string(), BlkidError::IntoStringError(ref err) => err.description().to_string(), } } } impl From<NulError> for BlkidError { fn from(err: NulError) -> BlkidError { BlkidError::NulError(err) } } impl From<FromUtf8Error> for BlkidError { fn from(err: FromUtf8Error) -> BlkidError { BlkidError::FromUtf8Error(err) } } impl From<IntoStringError> for BlkidError { fn from(err: IntoStringError) -> BlkidError { BlkidError::IntoStringError(err) } } impl From<Error> for BlkidError { fn from(err: Error) -> BlkidError { BlkidError::IoError(err) } } fn get_error() -> String { let error = errno(); format!("{}", error) } pub struct BlkId { probe: blkid_probe, } impl BlkId { pub fn new(file: &Path) -> Result<BlkId, BlkidError> { let path = try!(CString::new(file.as_os_str().to_string_lossy().as_ref())); unsafe { // pub fn blkid_do_probe(pr: blkid_probe) -> ::std::os::raw::c_int; // pub fn blkid_do_safeprobe(pr: blkid_probe) -> ::std::os::raw::c_int; // pub fn blkid_do_fullprobe(pr: blkid_probe) -> ::std::os::raw::c_int; let probe = blkid_new_probe_from_filename(path.as_ptr()); Ok(BlkId { probe: probe }) } } /// Calls probing functions in all enabled chains. The superblocks chain is enabled by /// default. The blkid_do_probe() stores result from only one probing function. /// It's necessary to call this routine in a loop to get results from all probing functions /// in all chains. The probing is reset by blkid_reset_probe() or by filter functions. /// This is string-based NAME=value interface only. pub fn do_probe(&self) -> Result<(), BlkidError> { unsafe { let ret_code = blkid_do_probe(self.probe); if ret_code < 0 { return Err(BlkidError::new(get_error())); } } Ok(()) } pub fn lookup_value(&self, name: &str) -> Result<String, BlkidError> { let name = try!(CString::new(name)); let mut data_ptr: *const ::libc::c_char = ptr::null(); let mut len = 0; unsafe { let ret_code = blkid_probe_lookup_value(self.probe, name.as_ptr(), &mut data_ptr, &mut len); if ret_code < 0 { return Err(BlkidError::new(get_error())); } let data_value = CStr::from_ptr(data_ptr as *const ::libc::c_char); Ok(data_value.to_string_lossy().into_owned()) } } pub fn has_value(&self, name: &str) -> Result<bool, BlkidError> { let name = try!(CString::new(name)); unsafe { let ret_code = blkid_probe_has_value(self.probe, name.as_ptr()); if ret_code < 0 { return Err(BlkidError::new(get_error())); } match ret_code { 0 => Ok(false), 1 => Ok(true), _ => { Err(BlkidError::new(format!("Unknown return code from \ blkid_probe_has_value: {}", ret_code))) } } } } /// number of values in probing result pub fn numof_values(&self) -> Result<i32, BlkidError> { unsafe { let ret_code = blkid_probe_numof_values(self.probe); if ret_code < 0 { return Err(BlkidError::new(get_error())); } Ok(ret_code) } } pub fn get_devno(&self) -> u64 { unsafe { blkid_probe_get_devno(self.probe) } } pub fn get_wholedisk_devno(&self) -> u64 { unsafe { blkid_probe_get_wholedisk_devno(self.probe) } } pub fn is_wholedisk(&self) -> Result<bool, BlkidError> { unsafe { let ret_code = blkid_probe_is_wholedisk(self.probe); match ret_code { 0 => Ok(false), 1 => Ok(true), _ => { Err(BlkidError::new(format!("Unknown return code from \ blkid_probe_has_value: {}", ret_code))) } } } } pub fn get_size(&self) -> Result<i64, BlkidError> { unsafe { let ret_code = blkid_probe_get_size(self.probe); if ret_code < 0 { return Err(BlkidError::new(get_error())); } Ok(ret_code) } } pub fn get_offset(&self) -> Result<i64, BlkidError> { unsafe { let ret_code = blkid_probe_get_offset(self.probe); if ret_code < 0 { return Err(BlkidError::new(get_error())); } Ok(ret_code) } } pub fn get_sectorsize(&self) -> u32 { unsafe { blkid_probe_get_sectorsize(self.probe) } } pub fn get_sectors(&self) -> Result<i64, BlkidError> { unsafe { let ret_code = blkid_probe_get_sectors(self.probe); if ret_code < 0 { return Err(BlkidError::new(get_error())); } Ok(ret_code) } } pub fn get_fd(&self) -> Result<i32, BlkidError> { unsafe { Ok(blkid_probe_get_fd(self.probe)) } } pub fn known_fstype(&self, fstype: &str) -> Result<bool, BlkidError> { let fstype = try!(CString::new(fstype)); unsafe { let ret_code = blkid_known_fstype(fstype.as_ptr()); match ret_code { 0 => Ok(false), 1 => Ok(true), _ => { Err(BlkidError::new(format!("Unknown return code from blkid_known_fstype: {}", ret_code))) } } } } /// Enables/disables the topology probing for non-binary interface. pub fn enable_topology(&self) -> Result<(), BlkidError> { unsafe { let ret_code = blkid_probe_enable_topology(self.probe, 1); if ret_code < 0 { return Err(BlkidError::new(get_error())); } } Ok(()) } /// This is a binary interface for topology values. See also blkid_topology_* functions. /// This function is independent on blkid_do_[safe,full]probe() and /// blkid_probe_enable_topology() calls. /// WARNING: the returned object will be overwritten by the next blkid_probe_get_topology() /// call for the same pr. If you want to use more blkid_topopogy objects in the same time you /// have to create more blkid_probe handlers (see blkid_new_probe()). pub fn get_topology(&self) -> Result<blkid_topology, BlkidError> { unsafe { Ok(blkid_probe_get_topology(self.probe)) } } /// alignment offset in bytes or 0. pub fn get_topology_alignment_offset(tp: blkid_topology) -> u64 { unsafe { blkid_topology_get_alignment_offset(tp) } } /// minimum io size in bytes or 0. pub fn get_topology_minimum_io_size(tp: blkid_topology) -> u64 { unsafe { blkid_topology_get_minimum_io_size(tp) } } /// optimal io size in bytes or 0. pub fn get_topology_optimal_io_size(tp: blkid_topology) -> u64 { unsafe { blkid_topology_get_optimal_io_size(tp) } } /// logical sector size (BLKSSZGET ioctl) in bytes or 0. pub fn get_topology_logical_sector_size(tp: blkid_topology) -> u64 { unsafe { blkid_topology_get_logical_sector_size(tp) } } /// logical sector size (BLKSSZGET ioctl) in bytes or 0. pub fn get_topology_physical_sector_size(tp: blkid_topology) -> u64 { unsafe { blkid_topology_get_physical_sector_size(tp) } } // pub fn blkid_probe_get_partitions(pr: blkid_probe) -> blkid_partlist; // pub fn blkid_partlist_numof_partitions(ls: blkid_partlist) // -> ::std::os::raw::c_int; // pub fn blkid_partlist_get_table(ls: blkid_partlist) -> blkid_parttable; // pub fn blkid_partlist_get_partition(ls: blkid_partlist, // n: ::std::os::raw::c_int) // -> blkid_partition; // pub fn blkid_partlist_devno_to_partition(ls: blkid_partlist, devno: dev_t) // -> blkid_partition; // pub fn blkid_partition_get_table(par: blkid_partition) -> blkid_parttable; // pub fn blkid_partition_get_name(par: blkid_partition) // pub fn blkid_partition_get_uuid(par: blkid_partition) -> *const ::std::os::raw::c_char; // pub fn blkid_partition_get_partno(par: blkid_partition) -> ::std::os::raw::c_int; // pub fn blkid_partition_get_start(par: blkid_partition) -> blkid_loff_t; // pub fn blkid_partition_get_size(par: blkid_partition) -> blkid_loff_t; // pub fn blkid_partition_get_type(par: blkid_partition) -> ::std::os::raw::c_int; // pub fn blkid_partition_get_type_string(par: blkid_partition) // -> *const ::std::os::raw::c_char; // pub fn blkid_partition_get_flags(par: blkid_partition) -> ::std::os::raw::c_ulonglong; // pub fn blkid_partition_is_logical(par: blkid_partition) -> ::std::os::raw::c_int; // pub fn blkid_partition_is_extended(par: blkid_partition) -> ::std::os::raw::c_int; // pub fn blkid_partition_is_primary(par: blkid_partition) -> ::std::os::raw::c_int; // pub fn blkid_parttable_get_type(tab: blkid_parttable) -> *const ::std::os::raw::c_char; // pub fn blkid_parttable_get_offset(tab: blkid_parttable) -> blkid_loff_t; // pub fn blkid_parttable_get_parent(tab: blkid_parttable) -> blkid_partition; } impl Drop for BlkId { fn drop(&mut self) { if self.probe.is_null() { // No cleanup needed return; } unsafe { blkid_free_probe(self.probe); } } } // pub fn blkid_put_cache(cache: blkid_cache); // pub fn blkid_get_cache(cache: *mut blkid_cache, // filename: *const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_dev_devname(dev: blkid_dev) -> *const ::std::os::raw::c_char; // pub fn blkid_dev_iterate_begin(cache: blkid_cache) -> blkid_dev_iterate; // pub fn blkid_dev_set_search(iter: blkid_dev_iterate, // search_type: *mut ::std::os::raw::c_char, // search_value: *mut ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_dev_next(iterate: blkid_dev_iterate, dev: *mut blkid_dev) // -> ::std::os::raw::c_int; // pub fn blkid_dev_iterate_end(iterate: blkid_dev_iterate); // pub fn blkid_devno_to_devname(devno: dev_t) // -> *mut ::std::os::raw::c_char; // pub fn blkid_devno_to_wholedisk(dev: dev_t, // diskname: *mut ::std::os::raw::c_char, // len: usize, diskdevno: *mut dev_t) // -> ::std::os::raw::c_int; // pub fn blkid_probe_all(cache: blkid_cache) -> ::std::os::raw::c_int; // pub fn blkid_probe_all_new(cache: blkid_cache) -> ::std::os::raw::c_int; // pub fn blkid_probe_all_removable(cache: blkid_cache) // -> ::std::os::raw::c_int; // pub fn blkid_get_dev(cache: blkid_cache, // devname: *const ::std::os::raw::c_char, // flags: ::std::os::raw::c_int) -> blkid_dev; // pub fn blkid_get_dev_size(fd: ::std::os::raw::c_int) -> blkid_loff_t; // pub fn blkid_verify(cache: blkid_cache, dev: blkid_dev) -> blkid_dev; // pub fn blkid_get_tag_value(cache: blkid_cache, // tagname: *const ::std::os::raw::c_char, // devname: *const ::std::os::raw::c_char) // -> *mut ::std::os::raw::c_char; // pub fn blkid_get_devname(cache: blkid_cache, // token: *const ::std::os::raw::c_char, // value: *const ::std::os::raw::c_char) // -> *mut ::std::os::raw::c_char; // pub fn blkid_tag_iterate_begin(dev: blkid_dev) -> blkid_tag_iterate; // pub fn blkid_tag_next(iterate: blkid_tag_iterate, // type_: *mut *const ::std::os::raw::c_char, // value: *mut *const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_tag_iterate_end(iterate: blkid_tag_iterate); // pub fn blkid_dev_has_tag(dev: blkid_dev, // type_: *const ::std::os::raw::c_char, // value: *const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_find_dev_with_tag(cache: blkid_cache, // type_: *const ::std::os::raw::c_char, // value: *const ::std::os::raw::c_char) // -> blkid_dev; // pub fn blkid_parse_tag_string(token: *const ::std::os::raw::c_char, // ret_type: *mut *mut ::std::os::raw::c_char, // ret_val: *mut *mut ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_parse_version_string(ver_string: // const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_get_library_version(ver_string: // mut *const ::std::os::raw::c_char, // date_string: // mut *const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_encode_string(str: *const ::std::os::raw::c_char, // str_enc: *mut ::std::os::raw::c_char, // len: usize) -> ::std::os::raw::c_int; // pub fn blkid_safe_string(str: *const ::std::os::raw::c_char, // str_safe: *mut ::std::os::raw::c_char, // len: usize) -> ::std::os::raw::c_int; // pub fn blkid_send_uevent(devname: *const ::std::os::raw::c_char, // action: *const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_evaluate_tag(token: *const ::std::os::raw::c_char, // value: *const ::std::os::raw::c_char, // cache: *mut blkid_cache) // -> *mut ::std::os::raw::c_char; // pub fn blkid_evaluate_spec(spec: *const ::std::os::raw::c_char, // cache: *mut blkid_cache) // -> *mut ::std::os::raw::c_char; // pub fn blkid_new_probe() -> blkid_probe; // pub fn blkid_reset_probe(pr: blkid_probe); // pub fn blkid_probe_set_device(pr: blkid_probe, fd: ::std::os::raw::c_int, // off: blkid_loff_t, size: blkid_loff_t) // -> ::std::os::raw::c_int; // pub fn blkid_superblocks_get_name(idx: usize, // name: // mut *const ::std::os::raw::c_char, // usage: *mut ::std::os::raw::c_int) // -> ::std::os::raw::c_int; // pub fn blkid_probe_enable_superblocks(pr: blkid_probe, // enable: ::std::os::raw::c_int) // -> ::std::os::raw::c_int; // pub fn blkid_probe_set_superblocks_flags(pr: blkid_probe, // flags: ::std::os::raw::c_int) // -> ::std::os::raw::c_int; // pub fn blkid_probe_reset_superblocks_filter(pr: blkid_probe) // -> ::std::os::raw::c_int; // pub fn blkid_probe_invert_superblocks_filter(pr: blkid_probe) // -> ::std::os::raw::c_int; // pub fn blkid_probe_filter_superblocks_type(pr: blkid_probe, // flag: ::std::os::raw::c_int, // names: // mut *mut ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_probe_filter_superblocks_usage(pr: blkid_probe, // flag: ::std::os::raw::c_int, // usage: ::std::os::raw::c_int) // -> ::std::os::raw::c_int; // pub fn blkid_known_pttype(pttype: *const ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_probe_enable_partitions(pr: blkid_probe, // enable: ::std::os::raw::c_int) // -> ::std::os::raw::c_int; // pub fn blkid_probe_reset_partitions_filter(pr: blkid_probe) // -> ::std::os::raw::c_int; // pub fn blkid_probe_invert_partitions_filter(pr: blkid_probe) // -> ::std::os::raw::c_int; // pub fn blkid_probe_filter_partitions_type(pr: blkid_probe, // flag: ::std::os::raw::c_int, // names: // mut *mut ::std::os::raw::c_char) // -> ::std::os::raw::c_int; // pub fn blkid_probe_set_partitions_flags(pr: blkid_probe, // flags: ::std::os::raw::c_int) // -> ::std::os::raw::c_int; // pub fn blkid_probe_get_value(pr: blkid_probe, // num: ::std::os::raw::c_int, // name: *mut *const ::std::os::raw::c_char, // data: *mut *const ::std::os::raw::c_char, // len: *mut usize) // -> ::std::os::raw::c_int;