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Commit | Line | Data |
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51b499db DM |
1 | //! Tools and utilities |
2 | //! | |
3 | //! This is a collection of small and useful tools. | |
6100071f WB |
4 | use std::any::Any; |
5 | use std::collections::HashMap; | |
62ee2eb4 | 6 | use std::hash::BuildHasher; |
365bb90f | 7 | use std::fs::{File, OpenOptions}; |
43eeef28 | 8 | use std::io::ErrorKind; |
6100071f | 9 | use std::io::Read; |
d96bb7f1 | 10 | use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd}; |
6100071f WB |
11 | use std::path::Path; |
12 | use std::time::Duration; | |
365bb90f | 13 | |
6100071f | 14 | use failure::*; |
af926291 | 15 | use serde_json::Value; |
c5946faf | 16 | use openssl::hash::{hash, DigestBytes, MessageDigest}; |
8a1028e0 | 17 | use percent_encoding::AsciiSet; |
0fe5d605 | 18 | |
f35197f4 WB |
19 | use proxmox::tools::vec; |
20 | ||
6100071f | 21 | pub mod acl; |
556eb70e | 22 | pub mod async_io; |
6ed25cbe | 23 | pub mod borrow; |
6100071f | 24 | pub mod daemon; |
b4d5787d | 25 | pub mod fs; |
daef93f4 | 26 | pub mod runtime; |
6100071f WB |
27 | pub mod ticket; |
28 | pub mod timer; | |
29 | pub mod tty; | |
30 | pub mod wrapped_reader_stream; | |
dcd033a5 DM |
31 | |
32 | mod std_channel_writer; | |
33 | pub use std_channel_writer::*; | |
34 | ||
2dcdd3b4 | 35 | pub mod xattr; |
8cf6e764 | 36 | |
a650f503 DM |
37 | mod process_locker; |
38 | pub use process_locker::*; | |
39 | ||
3b151414 DM |
40 | mod file_logger; |
41 | pub use file_logger::*; | |
42 | ||
490be29e DM |
43 | mod broadcast_future; |
44 | pub use broadcast_future::*; | |
45 | ||
fded74d0 | 46 | /// The `BufferedRead` trait provides a single function |
0a72e267 DM |
47 | /// `buffered_read`. It returns a reference to an internal buffer. The |
48 | /// purpose of this traid is to avoid unnecessary data copies. | |
fded74d0 | 49 | pub trait BufferedRead { |
318564ac DM |
50 | /// This functions tries to fill the internal buffers, then |
51 | /// returns a reference to the available data. It returns an empty | |
52 | /// buffer if `offset` points to the end of the file. | |
0a72e267 DM |
53 | fn buffered_read(&mut self, offset: u64) -> Result<&[u8], Error>; |
54 | } | |
55 | ||
51b499db DM |
56 | /// Directly map a type into a binary buffer. This is mostly useful |
57 | /// for reading structured data from a byte stream (file). You need to | |
58 | /// make sure that the buffer location does not change, so please | |
59 | /// avoid vec resize while you use such map. | |
60 | /// | |
61 | /// This function panics if the buffer is not large enough. | |
50ea4396 | 62 | pub fn map_struct<T>(buffer: &[u8]) -> Result<&T, Error> { |
dc3de618 DM |
63 | if buffer.len() < ::std::mem::size_of::<T>() { |
64 | bail!("unable to map struct - buffer too small"); | |
65 | } | |
6100071f | 66 | Ok(unsafe { &*(buffer.as_ptr() as *const T) }) |
dc3de618 DM |
67 | } |
68 | ||
51b499db DM |
69 | /// Directly map a type into a mutable binary buffer. This is mostly |
70 | /// useful for writing structured data into a byte stream (file). You | |
71 | /// need to make sure that the buffer location does not change, so | |
72 | /// please avoid vec resize while you use such map. | |
73 | /// | |
74 | /// This function panics if the buffer is not large enough. | |
50ea4396 | 75 | pub fn map_struct_mut<T>(buffer: &mut [u8]) -> Result<&mut T, Error> { |
dc3de618 DM |
76 | if buffer.len() < ::std::mem::size_of::<T>() { |
77 | bail!("unable to map struct - buffer too small"); | |
78 | } | |
6100071f | 79 | Ok(unsafe { &mut *(buffer.as_ptr() as *mut T) }) |
dc3de618 DM |
80 | } |
81 | ||
51b499db DM |
82 | /// Create a file lock using fntl. This function allows you to specify |
83 | /// a timeout if you want to avoid infinite blocking. | |
1628a4c7 WB |
84 | pub fn lock_file<F: AsRawFd>( |
85 | file: &mut F, | |
86 | exclusive: bool, | |
87 | timeout: Option<Duration>, | |
eb90c9e3 | 88 | ) -> Result<(), Error> { |
6100071f WB |
89 | let lockarg = if exclusive { |
90 | nix::fcntl::FlockArg::LockExclusive | |
91 | } else { | |
92 | nix::fcntl::FlockArg::LockShared | |
93 | }; | |
1628a4c7 WB |
94 | |
95 | let timeout = match timeout { | |
96 | None => { | |
97 | nix::fcntl::flock(file.as_raw_fd(), lockarg)?; | |
98 | return Ok(()); | |
99 | } | |
100 | Some(t) => t, | |
101 | }; | |
102 | ||
103 | // unblock the timeout signal temporarily | |
104 | let _sigblock_guard = timer::unblock_timeout_signal(); | |
105 | ||
106 | // setup a timeout timer | |
107 | let mut timer = timer::Timer::create( | |
108 | timer::Clock::Realtime, | |
6100071f WB |
109 | timer::TimerEvent::ThisThreadSignal(timer::SIGTIMEOUT), |
110 | )?; | |
1628a4c7 | 111 | |
6100071f WB |
112 | timer.arm( |
113 | timer::TimerSpec::new() | |
114 | .value(Some(timeout)) | |
115 | .interval(Some(Duration::from_millis(10))), | |
116 | )?; | |
1628a4c7 WB |
117 | |
118 | nix::fcntl::flock(file.as_raw_fd(), lockarg)?; | |
119 | Ok(()) | |
120 | } | |
365bb90f | 121 | |
51b499db DM |
122 | /// Open or create a lock file (append mode). Then try to |
123 | /// aquire a lock using `lock_file()`. | |
6100071f | 124 | pub fn open_file_locked<P: AsRef<Path>>(path: P, timeout: Duration) -> Result<File, Error> { |
1628a4c7 | 125 | let path = path.as_ref(); |
6100071f WB |
126 | let mut file = match OpenOptions::new().create(true).append(true).open(path) { |
127 | Ok(file) => file, | |
128 | Err(err) => bail!("Unable to open lock {:?} - {}", path, err), | |
129 | }; | |
28b96b56 DM |
130 | match lock_file(&mut file, true, Some(timeout)) { |
131 | Ok(_) => Ok(file), | |
6100071f | 132 | Err(err) => bail!("Unable to aquire lock {:?} - {}", path, err), |
28b96b56 | 133 | } |
365bb90f DM |
134 | } |
135 | ||
51b499db DM |
136 | /// Split a file into equal sized chunks. The last chunk may be |
137 | /// smaller. Note: We cannot implement an `Iterator`, because iterators | |
138 | /// cannot return a borrowed buffer ref (we want zero-copy) | |
6100071f WB |
139 | pub fn file_chunker<C, R>(mut file: R, chunk_size: usize, mut chunk_cb: C) -> Result<(), Error> |
140 | where | |
141 | C: FnMut(usize, &[u8]) -> Result<bool, Error>, | |
142 | R: Read, | |
43eeef28 | 143 | { |
6100071f | 144 | const READ_BUFFER_SIZE: usize = 4 * 1024 * 1024; // 4M |
43eeef28 | 145 | |
6100071f WB |
146 | if chunk_size > READ_BUFFER_SIZE { |
147 | bail!("chunk size too large!"); | |
148 | } | |
43eeef28 | 149 | |
8ea3b1d1 | 150 | let mut buf = vec::undefined(READ_BUFFER_SIZE); |
43eeef28 DM |
151 | |
152 | let mut pos = 0; | |
153 | let mut file_pos = 0; | |
154 | loop { | |
155 | let mut eof = false; | |
156 | let mut tmp = &mut buf[..]; | |
6100071f | 157 | // try to read large portions, at least chunk_size |
43eeef28 DM |
158 | while pos < chunk_size { |
159 | match file.read(tmp) { | |
6100071f WB |
160 | Ok(0) => { |
161 | eof = true; | |
162 | break; | |
163 | } | |
43eeef28 DM |
164 | Ok(n) => { |
165 | pos += n; | |
6100071f WB |
166 | if pos > chunk_size { |
167 | break; | |
168 | } | |
43eeef28 DM |
169 | tmp = &mut tmp[n..]; |
170 | } | |
171 | Err(ref e) if e.kind() == ErrorKind::Interrupted => { /* try again */ } | |
5f0c2d56 | 172 | Err(e) => bail!("read chunk failed - {}", e.to_string()), |
43eeef28 DM |
173 | } |
174 | } | |
43eeef28 DM |
175 | let mut start = 0; |
176 | while start + chunk_size <= pos { | |
6100071f WB |
177 | if !(chunk_cb)(file_pos, &buf[start..start + chunk_size])? { |
178 | break; | |
179 | } | |
43eeef28 DM |
180 | file_pos += chunk_size; |
181 | start += chunk_size; | |
182 | } | |
183 | if eof { | |
184 | if start < pos { | |
185 | (chunk_cb)(file_pos, &buf[start..pos])?; | |
186 | //file_pos += pos - start; | |
187 | } | |
188 | break; | |
189 | } else { | |
190 | let rest = pos - start; | |
191 | if rest > 0 { | |
192 | let ptr = buf.as_mut_ptr(); | |
6100071f WB |
193 | unsafe { |
194 | std::ptr::copy_nonoverlapping(ptr.add(start), ptr, rest); | |
195 | } | |
43eeef28 DM |
196 | pos = rest; |
197 | } else { | |
198 | pos = 0; | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | Ok(()) | |
43eeef28 | 204 | } |
0fe5d605 | 205 | |
f5f13ebc | 206 | pub fn json_object_to_query(data: Value) -> Result<String, Error> { |
f5f13ebc DM |
207 | let mut query = url::form_urlencoded::Serializer::new(String::new()); |
208 | ||
209 | let object = data.as_object().ok_or_else(|| { | |
210 | format_err!("json_object_to_query: got wrong data type (expected object).") | |
211 | })?; | |
212 | ||
213 | for (key, value) in object { | |
214 | match value { | |
6100071f WB |
215 | Value::Bool(b) => { |
216 | query.append_pair(key, &b.to_string()); | |
217 | } | |
218 | Value::Number(n) => { | |
219 | query.append_pair(key, &n.to_string()); | |
220 | } | |
221 | Value::String(s) => { | |
222 | query.append_pair(key, &s); | |
223 | } | |
f5f13ebc DM |
224 | Value::Array(arr) => { |
225 | for element in arr { | |
226 | match element { | |
6100071f WB |
227 | Value::Bool(b) => { |
228 | query.append_pair(key, &b.to_string()); | |
229 | } | |
230 | Value::Number(n) => { | |
231 | query.append_pair(key, &n.to_string()); | |
232 | } | |
233 | Value::String(s) => { | |
234 | query.append_pair(key, &s); | |
235 | } | |
236 | _ => bail!( | |
237 | "json_object_to_query: unable to handle complex array data types." | |
238 | ), | |
f5f13ebc DM |
239 | } |
240 | } | |
241 | } | |
242 | _ => bail!("json_object_to_query: unable to handle complex data types."), | |
243 | } | |
244 | } | |
245 | ||
246 | Ok(query.finish()) | |
247 | } | |
248 | ||
0fe5d605 | 249 | pub fn required_string_param<'a>(param: &'a Value, name: &str) -> Result<&'a str, Error> { |
6100071f | 250 | match param[name].as_str() { |
0fe5d605 DM |
251 | Some(s) => Ok(s), |
252 | None => bail!("missing parameter '{}'", name), | |
253 | } | |
254 | } | |
0d38dcb4 | 255 | |
e17d5d86 DM |
256 | pub fn required_string_property<'a>(param: &'a Value, name: &str) -> Result<&'a str, Error> { |
257 | match param[name].as_str() { | |
258 | Some(s) => Ok(s), | |
259 | None => bail!("missing property '{}'", name), | |
260 | } | |
261 | } | |
262 | ||
0d38dcb4 | 263 | pub fn required_integer_param<'a>(param: &'a Value, name: &str) -> Result<i64, Error> { |
6100071f | 264 | match param[name].as_i64() { |
0d38dcb4 DM |
265 | Some(s) => Ok(s), |
266 | None => bail!("missing parameter '{}'", name), | |
f8dfbb45 DM |
267 | } |
268 | } | |
269 | ||
e17d5d86 DM |
270 | pub fn required_integer_property<'a>(param: &'a Value, name: &str) -> Result<i64, Error> { |
271 | match param[name].as_i64() { | |
272 | Some(s) => Ok(s), | |
273 | None => bail!("missing property '{}'", name), | |
274 | } | |
275 | } | |
276 | ||
f8dfbb45 | 277 | pub fn required_array_param<'a>(param: &'a Value, name: &str) -> Result<Vec<Value>, Error> { |
6100071f | 278 | match param[name].as_array() { |
f8dfbb45 DM |
279 | Some(s) => Ok(s.to_vec()), |
280 | None => bail!("missing parameter '{}'", name), | |
0d38dcb4 DM |
281 | } |
282 | } | |
383e8577 | 283 | |
e17d5d86 DM |
284 | pub fn required_array_property<'a>(param: &'a Value, name: &str) -> Result<Vec<Value>, Error> { |
285 | match param[name].as_array() { | |
286 | Some(s) => Ok(s.to_vec()), | |
287 | None => bail!("missing property '{}'", name), | |
288 | } | |
289 | } | |
290 | ||
62ee2eb4 | 291 | pub fn complete_file_name<S: BuildHasher>(arg: &str, _param: &HashMap<String, String, S>) -> Vec<String> { |
383e8577 DM |
292 | let mut result = vec![]; |
293 | ||
6100071f | 294 | use nix::fcntl::AtFlags; |
383e8577 DM |
295 | use nix::fcntl::OFlag; |
296 | use nix::sys::stat::Mode; | |
383e8577 | 297 | |
62ee2eb4 | 298 | let mut dirname = std::path::PathBuf::from(if arg.is_empty() { "./" } else { arg }); |
383e8577 DM |
299 | |
300 | let is_dir = match nix::sys::stat::fstatat(libc::AT_FDCWD, &dirname, AtFlags::empty()) { | |
301 | Ok(stat) => (stat.st_mode & libc::S_IFMT) == libc::S_IFDIR, | |
302 | Err(_) => false, | |
303 | }; | |
304 | ||
305 | if !is_dir { | |
306 | if let Some(parent) = dirname.parent() { | |
307 | dirname = parent.to_owned(); | |
308 | } | |
309 | } | |
310 | ||
6100071f WB |
311 | let mut dir = |
312 | match nix::dir::Dir::openat(libc::AT_FDCWD, &dirname, OFlag::O_DIRECTORY, Mode::empty()) { | |
313 | Ok(d) => d, | |
314 | Err(_) => return result, | |
315 | }; | |
383e8577 DM |
316 | |
317 | for item in dir.iter() { | |
318 | if let Ok(entry) = item { | |
319 | if let Ok(name) = entry.file_name().to_str() { | |
6100071f WB |
320 | if name == "." || name == ".." { |
321 | continue; | |
322 | } | |
383e8577 DM |
323 | let mut newpath = dirname.clone(); |
324 | newpath.push(name); | |
325 | ||
6100071f WB |
326 | if let Ok(stat) = |
327 | nix::sys::stat::fstatat(libc::AT_FDCWD, &newpath, AtFlags::empty()) | |
328 | { | |
383e8577 DM |
329 | if (stat.st_mode & libc::S_IFMT) == libc::S_IFDIR { |
330 | newpath.push(""); | |
331 | if let Some(newpath) = newpath.to_str() { | |
332 | result.push(newpath.to_owned()); | |
333 | } | |
334 | continue; | |
6100071f | 335 | } |
383e8577 DM |
336 | } |
337 | if let Some(newpath) = newpath.to_str() { | |
338 | result.push(newpath.to_owned()); | |
339 | } | |
6100071f | 340 | } |
383e8577 DM |
341 | } |
342 | } | |
343 | ||
344 | result | |
345 | } | |
443f3743 DM |
346 | |
347 | /// Scan directory for matching file names. | |
348 | /// | |
349 | /// Scan through all directory entries and call `callback()` function | |
350 | /// if the entry name matches the regular expression. This function | |
351 | /// used unix `openat()`, so you can pass absolute or relative file | |
352 | /// names. This function simply skips non-UTF8 encoded names. | |
353 | pub fn scandir<P, F>( | |
354 | dirfd: RawFd, | |
121f18ef | 355 | path: &P, |
443f3743 | 356 | regex: ®ex::Regex, |
6100071f | 357 | mut callback: F, |
443f3743 | 358 | ) -> Result<(), Error> |
6100071f WB |
359 | where |
360 | F: FnMut(RawFd, &str, nix::dir::Type) -> Result<(), Error>, | |
361 | P: ?Sized + nix::NixPath, | |
443f3743 | 362 | { |
121f18ef | 363 | for entry in self::fs::scan_subdir(dirfd, path, regex)? { |
443f3743 DM |
364 | let entry = entry?; |
365 | let file_type = match entry.file_type() { | |
366 | Some(file_type) => file_type, | |
367 | None => bail!("unable to detect file type"), | |
368 | }; | |
443f3743 | 369 | |
6100071f WB |
370 | callback( |
371 | entry.parent_fd(), | |
372 | unsafe { entry.file_name_utf8_unchecked() }, | |
373 | file_type, | |
374 | )?; | |
443f3743 DM |
375 | } |
376 | Ok(()) | |
377 | } | |
7e13b2d6 | 378 | |
c5946faf WB |
379 | /// Shortcut for md5 sums. |
380 | pub fn md5sum(data: &[u8]) -> Result<DigestBytes, Error> { | |
381 | hash(MessageDigest::md5(), data).map_err(Error::from) | |
382 | } | |
383 | ||
7e13b2d6 | 384 | pub fn get_hardware_address() -> Result<String, Error> { |
1631c54f | 385 | static FILENAME: &str = "/etc/ssh/ssh_host_rsa_key.pub"; |
7e13b2d6 | 386 | |
e18a6c9e | 387 | let contents = proxmox::tools::fs::file_get_contents(FILENAME)?; |
c5946faf | 388 | let digest = md5sum(&contents)?; |
7e13b2d6 | 389 | |
c5946faf | 390 | Ok(proxmox::tools::bin_to_hex(&digest)) |
7e13b2d6 | 391 | } |
22968600 | 392 | |
af2fddea DM |
393 | pub fn assert_if_modified(digest1: &str, digest2: &str) -> Result<(), Error> { |
394 | if digest1 != digest2 { | |
6100071f | 395 | bail!("detected modified configuration - file changed by other user? Try again."); |
af2fddea DM |
396 | } |
397 | Ok(()) | |
398 | } | |
b9903d63 DM |
399 | |
400 | /// Extract authentication cookie from cookie header. | |
401 | /// We assume cookie_name is already url encoded. | |
402 | pub fn extract_auth_cookie(cookie: &str, cookie_name: &str) -> Option<String> { | |
b9903d63 | 403 | for pair in cookie.split(';') { |
b9903d63 DM |
404 | let (name, value) = match pair.find('=') { |
405 | Some(i) => (pair[..i].trim(), pair[(i + 1)..].trim()), | |
406 | None => return None, // Cookie format error | |
407 | }; | |
408 | ||
409 | if name == cookie_name { | |
8a1028e0 | 410 | use percent_encoding::percent_decode; |
b9903d63 DM |
411 | if let Ok(value) = percent_decode(value.as_bytes()).decode_utf8() { |
412 | return Some(value.into()); | |
413 | } else { | |
414 | return None; // Cookie format error | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
419 | None | |
420 | } | |
af53186e DM |
421 | |
422 | pub fn join(data: &Vec<String>, sep: char) -> String { | |
af53186e DM |
423 | let mut list = String::new(); |
424 | ||
425 | for item in data { | |
62ee2eb4 | 426 | if !list.is_empty() { |
6100071f WB |
427 | list.push(sep); |
428 | } | |
af53186e DM |
429 | list.push_str(item); |
430 | } | |
431 | ||
432 | list | |
433 | } | |
ff7049d4 | 434 | |
002a191a DM |
435 | /// Detect modified configuration files |
436 | /// | |
437 | /// This function fails with a resonable error message if checksums do not match. | |
438 | pub fn detect_modified_configuration_file(digest1: &[u8;32], digest2: &[u8;32]) -> Result<(), Error> { | |
439 | if digest1 != digest2 { | |
440 | bail!("detected modified configuration - file changed by other user? Try again."); | |
441 | } | |
442 | Ok(()) | |
443 | } | |
444 | ||
3578d99f DM |
445 | /// normalize uri path |
446 | /// | |
447 | /// Do not allow ".", "..", or hidden files ".XXXX" | |
448 | /// Also remove empty path components | |
449 | pub fn normalize_uri_path(path: &str) -> Result<(String, Vec<&str>), Error> { | |
3578d99f DM |
450 | let items = path.split('/'); |
451 | ||
452 | let mut path = String::new(); | |
453 | let mut components = vec![]; | |
454 | ||
455 | for name in items { | |
6100071f WB |
456 | if name.is_empty() { |
457 | continue; | |
458 | } | |
62ee2eb4 | 459 | if name.starts_with('.') { |
3578d99f DM |
460 | bail!("Path contains illegal components."); |
461 | } | |
462 | path.push('/'); | |
463 | path.push_str(name); | |
464 | components.push(name); | |
465 | } | |
466 | ||
467 | Ok((path, components)) | |
468 | } | |
469 | ||
ff7049d4 | 470 | pub fn fd_change_cloexec(fd: RawFd, on: bool) -> Result<(), Error> { |
6100071f | 471 | use nix::fcntl::{fcntl, FdFlag, F_GETFD, F_SETFD}; |
ff7049d4 WB |
472 | let mut flags = FdFlag::from_bits(fcntl(fd, F_GETFD)?) |
473 | .ok_or_else(|| format_err!("unhandled file flags"))?; // nix crate is stupid this way... | |
474 | flags.set(FdFlag::FD_CLOEXEC, on); | |
475 | fcntl(fd, F_SETFD(flags))?; | |
476 | Ok(()) | |
477 | } | |
9136f857 | 478 | |
9136f857 DM |
479 | static mut SHUTDOWN_REQUESTED: bool = false; |
480 | ||
481 | pub fn request_shutdown() { | |
6100071f WB |
482 | unsafe { |
483 | SHUTDOWN_REQUESTED = true; | |
484 | } | |
7a630df7 | 485 | crate::server::server_shutdown(); |
9136f857 DM |
486 | } |
487 | ||
488 | #[inline(always)] | |
489 | pub fn shutdown_requested() -> bool { | |
490 | unsafe { SHUTDOWN_REQUESTED } | |
491 | } | |
92da93b2 DM |
492 | |
493 | pub fn fail_on_shutdown() -> Result<(), Error> { | |
494 | if shutdown_requested() { | |
495 | bail!("Server shutdown requested - aborting task"); | |
496 | } | |
497 | Ok(()) | |
498 | } | |
d96bb7f1 WB |
499 | |
500 | /// Guard a raw file descriptor with a drop handler. This is mostly useful when access to an owned | |
501 | /// `RawFd` is required without the corresponding handler object (such as when only the file | |
502 | /// descriptor number is required in a closure which may be dropped instead of being executed). | |
503 | pub struct Fd(pub RawFd); | |
504 | ||
505 | impl Drop for Fd { | |
506 | fn drop(&mut self) { | |
507 | if self.0 != -1 { | |
508 | unsafe { | |
509 | libc::close(self.0); | |
510 | } | |
511 | } | |
512 | } | |
513 | } | |
514 | ||
515 | impl AsRawFd for Fd { | |
516 | fn as_raw_fd(&self) -> RawFd { | |
517 | self.0 | |
518 | } | |
519 | } | |
520 | ||
521 | impl IntoRawFd for Fd { | |
522 | fn into_raw_fd(mut self) -> RawFd { | |
523 | let fd = self.0; | |
524 | self.0 = -1; | |
525 | fd | |
526 | } | |
527 | } | |
528 | ||
529 | impl FromRawFd for Fd { | |
530 | unsafe fn from_raw_fd(fd: RawFd) -> Self { | |
531 | Self(fd) | |
532 | } | |
533 | } | |
efd1536e WB |
534 | |
535 | // wrap nix::unistd::pipe2 + O_CLOEXEC into something returning guarded file descriptors | |
536 | pub fn pipe() -> Result<(Fd, Fd), Error> { | |
537 | let (pin, pout) = nix::unistd::pipe2(nix::fcntl::OFlag::O_CLOEXEC)?; | |
538 | Ok((Fd(pin), Fd(pout))) | |
539 | } | |
2edc341b DM |
540 | |
541 | /// An easy way to convert types to Any | |
542 | /// | |
543 | /// Mostly useful to downcast trait objects (see RpcEnvironment). | |
544 | pub trait AsAny { | |
dd5495d6 | 545 | fn as_any(&self) -> &dyn Any; |
2edc341b DM |
546 | } |
547 | ||
548 | impl<T: Any> AsAny for T { | |
6100071f WB |
549 | fn as_any(&self) -> &dyn Any { |
550 | self | |
551 | } | |
2edc341b | 552 | } |
8a1028e0 WB |
553 | |
554 | /// This used to be: `SIMPLE_ENCODE_SET` plus space, `"`, `#`, `<`, `>`, backtick, `?`, `{`, `}` | |
555 | pub const DEFAULT_ENCODE_SET: &AsciiSet = &percent_encoding::CONTROLS // 0..1f and 7e | |
556 | // The SIMPLE_ENCODE_SET adds space and anything >= 0x7e (7e itself is already included above) | |
557 | .add(0x20) | |
558 | .add(0x7f) | |
559 | // the DEFAULT_ENCODE_SET added: | |
560 | .add(b' ') | |
561 | .add(b'"') | |
562 | .add(b'#') | |
563 | .add(b'<') | |
564 | .add(b'>') | |
565 | .add(b'`') | |
566 | .add(b'?') | |
567 | .add(b'{') | |
568 | .add(b'}'); |