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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; |
98c259b4 | 7 | use std::fs::File; |
1bc1d81a | 8 | use std::io::{self, BufRead, ErrorKind, Read, Seek, SeekFrom}; |
98c259b4 | 9 | use std::os::unix::io::RawFd; |
6100071f | 10 | use std::path::Path; |
365bb90f | 11 | |
f7d4e4b5 | 12 | use anyhow::{bail, format_err, Error}; |
af926291 | 13 | use serde_json::Value; |
c5946faf | 14 | use openssl::hash::{hash, DigestBytes, MessageDigest}; |
8a1028e0 | 15 | use percent_encoding::AsciiSet; |
0fe5d605 | 16 | |
f35197f4 WB |
17 | use proxmox::tools::vec; |
18 | ||
00ec8d16 WB |
19 | pub use proxmox::tools::fd::Fd; |
20 | ||
6100071f | 21 | pub mod acl; |
556eb70e | 22 | pub mod async_io; |
6ed25cbe | 23 | pub mod borrow; |
ec01eead | 24 | pub mod cert; |
6100071f | 25 | pub mod daemon; |
10effc98 | 26 | pub mod disks; |
b4d5787d | 27 | pub mod fs; |
4939255f | 28 | pub mod format; |
1685c2e3 | 29 | pub mod lru_cache; |
daef93f4 | 30 | pub mod runtime; |
6100071f | 31 | pub mod ticket; |
ba974798 | 32 | pub mod statistics; |
f486e9e5 | 33 | pub mod systemd; |
177a2de9 | 34 | pub mod nom; |
8074d2b0 | 35 | pub mod logrotate; |
45f9b32e SR |
36 | pub mod loopdev; |
37 | pub mod fuse_loop; | |
97168f92 | 38 | pub mod socket; |
f1d99e3f | 39 | |
3c9b3702 DM |
40 | mod parallel_handler; |
41 | pub use parallel_handler::*; | |
42 | ||
f1d99e3f DM |
43 | mod wrapped_reader_stream; |
44 | pub use wrapped_reader_stream::*; | |
dcd033a5 DM |
45 | |
46 | mod std_channel_writer; | |
47 | pub use std_channel_writer::*; | |
48 | ||
2dcdd3b4 | 49 | pub mod xattr; |
8cf6e764 | 50 | |
a650f503 DM |
51 | mod process_locker; |
52 | pub use process_locker::*; | |
53 | ||
3b151414 DM |
54 | mod file_logger; |
55 | pub use file_logger::*; | |
56 | ||
490be29e DM |
57 | mod broadcast_future; |
58 | pub use broadcast_future::*; | |
59 | ||
fded74d0 | 60 | /// The `BufferedRead` trait provides a single function |
0a72e267 DM |
61 | /// `buffered_read`. It returns a reference to an internal buffer. The |
62 | /// purpose of this traid is to avoid unnecessary data copies. | |
fded74d0 | 63 | pub trait BufferedRead { |
318564ac DM |
64 | /// This functions tries to fill the internal buffers, then |
65 | /// returns a reference to the available data. It returns an empty | |
66 | /// buffer if `offset` points to the end of the file. | |
0a72e267 DM |
67 | fn buffered_read(&mut self, offset: u64) -> Result<&[u8], Error>; |
68 | } | |
69 | ||
51b499db DM |
70 | /// Split a file into equal sized chunks. The last chunk may be |
71 | /// smaller. Note: We cannot implement an `Iterator`, because iterators | |
72 | /// cannot return a borrowed buffer ref (we want zero-copy) | |
6100071f WB |
73 | pub fn file_chunker<C, R>(mut file: R, chunk_size: usize, mut chunk_cb: C) -> Result<(), Error> |
74 | where | |
75 | C: FnMut(usize, &[u8]) -> Result<bool, Error>, | |
76 | R: Read, | |
43eeef28 | 77 | { |
6100071f | 78 | const READ_BUFFER_SIZE: usize = 4 * 1024 * 1024; // 4M |
43eeef28 | 79 | |
6100071f WB |
80 | if chunk_size > READ_BUFFER_SIZE { |
81 | bail!("chunk size too large!"); | |
82 | } | |
43eeef28 | 83 | |
8ea3b1d1 | 84 | let mut buf = vec::undefined(READ_BUFFER_SIZE); |
43eeef28 DM |
85 | |
86 | let mut pos = 0; | |
87 | let mut file_pos = 0; | |
88 | loop { | |
89 | let mut eof = false; | |
90 | let mut tmp = &mut buf[..]; | |
6100071f | 91 | // try to read large portions, at least chunk_size |
43eeef28 DM |
92 | while pos < chunk_size { |
93 | match file.read(tmp) { | |
6100071f WB |
94 | Ok(0) => { |
95 | eof = true; | |
96 | break; | |
97 | } | |
43eeef28 DM |
98 | Ok(n) => { |
99 | pos += n; | |
6100071f WB |
100 | if pos > chunk_size { |
101 | break; | |
102 | } | |
43eeef28 DM |
103 | tmp = &mut tmp[n..]; |
104 | } | |
105 | Err(ref e) if e.kind() == ErrorKind::Interrupted => { /* try again */ } | |
5f0c2d56 | 106 | Err(e) => bail!("read chunk failed - {}", e.to_string()), |
43eeef28 DM |
107 | } |
108 | } | |
43eeef28 DM |
109 | let mut start = 0; |
110 | while start + chunk_size <= pos { | |
6100071f WB |
111 | if !(chunk_cb)(file_pos, &buf[start..start + chunk_size])? { |
112 | break; | |
113 | } | |
43eeef28 DM |
114 | file_pos += chunk_size; |
115 | start += chunk_size; | |
116 | } | |
117 | if eof { | |
118 | if start < pos { | |
119 | (chunk_cb)(file_pos, &buf[start..pos])?; | |
120 | //file_pos += pos - start; | |
121 | } | |
122 | break; | |
123 | } else { | |
124 | let rest = pos - start; | |
125 | if rest > 0 { | |
126 | let ptr = buf.as_mut_ptr(); | |
6100071f WB |
127 | unsafe { |
128 | std::ptr::copy_nonoverlapping(ptr.add(start), ptr, rest); | |
129 | } | |
43eeef28 DM |
130 | pos = rest; |
131 | } else { | |
132 | pos = 0; | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | Ok(()) | |
43eeef28 | 138 | } |
0fe5d605 | 139 | |
f5f13ebc | 140 | pub fn json_object_to_query(data: Value) -> Result<String, Error> { |
f5f13ebc DM |
141 | let mut query = url::form_urlencoded::Serializer::new(String::new()); |
142 | ||
143 | let object = data.as_object().ok_or_else(|| { | |
144 | format_err!("json_object_to_query: got wrong data type (expected object).") | |
145 | })?; | |
146 | ||
147 | for (key, value) in object { | |
148 | match value { | |
6100071f WB |
149 | Value::Bool(b) => { |
150 | query.append_pair(key, &b.to_string()); | |
151 | } | |
152 | Value::Number(n) => { | |
153 | query.append_pair(key, &n.to_string()); | |
154 | } | |
155 | Value::String(s) => { | |
156 | query.append_pair(key, &s); | |
157 | } | |
f5f13ebc DM |
158 | Value::Array(arr) => { |
159 | for element in arr { | |
160 | match element { | |
6100071f WB |
161 | Value::Bool(b) => { |
162 | query.append_pair(key, &b.to_string()); | |
163 | } | |
164 | Value::Number(n) => { | |
165 | query.append_pair(key, &n.to_string()); | |
166 | } | |
167 | Value::String(s) => { | |
168 | query.append_pair(key, &s); | |
169 | } | |
170 | _ => bail!( | |
171 | "json_object_to_query: unable to handle complex array data types." | |
172 | ), | |
f5f13ebc DM |
173 | } |
174 | } | |
175 | } | |
176 | _ => bail!("json_object_to_query: unable to handle complex data types."), | |
177 | } | |
178 | } | |
179 | ||
180 | Ok(query.finish()) | |
181 | } | |
182 | ||
0fe5d605 | 183 | pub fn required_string_param<'a>(param: &'a Value, name: &str) -> Result<&'a str, Error> { |
6100071f | 184 | match param[name].as_str() { |
0fe5d605 DM |
185 | Some(s) => Ok(s), |
186 | None => bail!("missing parameter '{}'", name), | |
187 | } | |
188 | } | |
0d38dcb4 | 189 | |
e17d5d86 DM |
190 | pub fn required_string_property<'a>(param: &'a Value, name: &str) -> Result<&'a str, Error> { |
191 | match param[name].as_str() { | |
192 | Some(s) => Ok(s), | |
193 | None => bail!("missing property '{}'", name), | |
194 | } | |
195 | } | |
196 | ||
0d38dcb4 | 197 | pub fn required_integer_param<'a>(param: &'a Value, name: &str) -> Result<i64, Error> { |
6100071f | 198 | match param[name].as_i64() { |
0d38dcb4 DM |
199 | Some(s) => Ok(s), |
200 | None => bail!("missing parameter '{}'", name), | |
f8dfbb45 DM |
201 | } |
202 | } | |
203 | ||
e17d5d86 DM |
204 | pub fn required_integer_property<'a>(param: &'a Value, name: &str) -> Result<i64, Error> { |
205 | match param[name].as_i64() { | |
206 | Some(s) => Ok(s), | |
207 | None => bail!("missing property '{}'", name), | |
208 | } | |
209 | } | |
210 | ||
f8dfbb45 | 211 | pub fn required_array_param<'a>(param: &'a Value, name: &str) -> Result<Vec<Value>, Error> { |
6100071f | 212 | match param[name].as_array() { |
f8dfbb45 DM |
213 | Some(s) => Ok(s.to_vec()), |
214 | None => bail!("missing parameter '{}'", name), | |
0d38dcb4 DM |
215 | } |
216 | } | |
383e8577 | 217 | |
e17d5d86 DM |
218 | pub fn required_array_property<'a>(param: &'a Value, name: &str) -> Result<Vec<Value>, Error> { |
219 | match param[name].as_array() { | |
220 | Some(s) => Ok(s.to_vec()), | |
221 | None => bail!("missing property '{}'", name), | |
222 | } | |
223 | } | |
224 | ||
62ee2eb4 | 225 | pub fn complete_file_name<S: BuildHasher>(arg: &str, _param: &HashMap<String, String, S>) -> Vec<String> { |
383e8577 DM |
226 | let mut result = vec![]; |
227 | ||
6100071f | 228 | use nix::fcntl::AtFlags; |
383e8577 DM |
229 | use nix::fcntl::OFlag; |
230 | use nix::sys::stat::Mode; | |
383e8577 | 231 | |
62ee2eb4 | 232 | let mut dirname = std::path::PathBuf::from(if arg.is_empty() { "./" } else { arg }); |
383e8577 DM |
233 | |
234 | let is_dir = match nix::sys::stat::fstatat(libc::AT_FDCWD, &dirname, AtFlags::empty()) { | |
235 | Ok(stat) => (stat.st_mode & libc::S_IFMT) == libc::S_IFDIR, | |
236 | Err(_) => false, | |
237 | }; | |
238 | ||
239 | if !is_dir { | |
240 | if let Some(parent) = dirname.parent() { | |
241 | dirname = parent.to_owned(); | |
242 | } | |
243 | } | |
244 | ||
6100071f WB |
245 | let mut dir = |
246 | match nix::dir::Dir::openat(libc::AT_FDCWD, &dirname, OFlag::O_DIRECTORY, Mode::empty()) { | |
247 | Ok(d) => d, | |
248 | Err(_) => return result, | |
249 | }; | |
383e8577 DM |
250 | |
251 | for item in dir.iter() { | |
252 | if let Ok(entry) = item { | |
253 | if let Ok(name) = entry.file_name().to_str() { | |
6100071f WB |
254 | if name == "." || name == ".." { |
255 | continue; | |
256 | } | |
383e8577 DM |
257 | let mut newpath = dirname.clone(); |
258 | newpath.push(name); | |
259 | ||
6100071f WB |
260 | if let Ok(stat) = |
261 | nix::sys::stat::fstatat(libc::AT_FDCWD, &newpath, AtFlags::empty()) | |
262 | { | |
383e8577 DM |
263 | if (stat.st_mode & libc::S_IFMT) == libc::S_IFDIR { |
264 | newpath.push(""); | |
265 | if let Some(newpath) = newpath.to_str() { | |
266 | result.push(newpath.to_owned()); | |
267 | } | |
268 | continue; | |
6100071f | 269 | } |
383e8577 DM |
270 | } |
271 | if let Some(newpath) = newpath.to_str() { | |
272 | result.push(newpath.to_owned()); | |
273 | } | |
6100071f | 274 | } |
383e8577 DM |
275 | } |
276 | } | |
277 | ||
278 | result | |
279 | } | |
443f3743 DM |
280 | |
281 | /// Scan directory for matching file names. | |
282 | /// | |
283 | /// Scan through all directory entries and call `callback()` function | |
284 | /// if the entry name matches the regular expression. This function | |
285 | /// used unix `openat()`, so you can pass absolute or relative file | |
286 | /// names. This function simply skips non-UTF8 encoded names. | |
287 | pub fn scandir<P, F>( | |
288 | dirfd: RawFd, | |
121f18ef | 289 | path: &P, |
443f3743 | 290 | regex: ®ex::Regex, |
6100071f | 291 | mut callback: F, |
443f3743 | 292 | ) -> Result<(), Error> |
6100071f WB |
293 | where |
294 | F: FnMut(RawFd, &str, nix::dir::Type) -> Result<(), Error>, | |
295 | P: ?Sized + nix::NixPath, | |
443f3743 | 296 | { |
121f18ef | 297 | for entry in self::fs::scan_subdir(dirfd, path, regex)? { |
443f3743 DM |
298 | let entry = entry?; |
299 | let file_type = match entry.file_type() { | |
300 | Some(file_type) => file_type, | |
301 | None => bail!("unable to detect file type"), | |
302 | }; | |
443f3743 | 303 | |
6100071f WB |
304 | callback( |
305 | entry.parent_fd(), | |
306 | unsafe { entry.file_name_utf8_unchecked() }, | |
307 | file_type, | |
308 | )?; | |
443f3743 DM |
309 | } |
310 | Ok(()) | |
311 | } | |
7e13b2d6 | 312 | |
c5946faf WB |
313 | /// Shortcut for md5 sums. |
314 | pub fn md5sum(data: &[u8]) -> Result<DigestBytes, Error> { | |
315 | hash(MessageDigest::md5(), data).map_err(Error::from) | |
316 | } | |
317 | ||
7e13b2d6 | 318 | pub fn get_hardware_address() -> Result<String, Error> { |
1631c54f | 319 | static FILENAME: &str = "/etc/ssh/ssh_host_rsa_key.pub"; |
7e13b2d6 | 320 | |
e18a6c9e | 321 | let contents = proxmox::tools::fs::file_get_contents(FILENAME)?; |
c5946faf | 322 | let digest = md5sum(&contents)?; |
7e13b2d6 | 323 | |
c5946faf | 324 | Ok(proxmox::tools::bin_to_hex(&digest)) |
7e13b2d6 | 325 | } |
22968600 | 326 | |
af2fddea DM |
327 | pub fn assert_if_modified(digest1: &str, digest2: &str) -> Result<(), Error> { |
328 | if digest1 != digest2 { | |
6100071f | 329 | bail!("detected modified configuration - file changed by other user? Try again."); |
af2fddea DM |
330 | } |
331 | Ok(()) | |
332 | } | |
b9903d63 | 333 | |
09f12d1c | 334 | /// Extract a specific cookie from cookie header. |
b9903d63 | 335 | /// We assume cookie_name is already url encoded. |
09f12d1c | 336 | pub fn extract_cookie(cookie: &str, cookie_name: &str) -> Option<String> { |
b9903d63 | 337 | for pair in cookie.split(';') { |
b9903d63 DM |
338 | let (name, value) = match pair.find('=') { |
339 | Some(i) => (pair[..i].trim(), pair[(i + 1)..].trim()), | |
340 | None => return None, // Cookie format error | |
341 | }; | |
342 | ||
343 | if name == cookie_name { | |
8a1028e0 | 344 | use percent_encoding::percent_decode; |
b9903d63 DM |
345 | if let Ok(value) = percent_decode(value.as_bytes()).decode_utf8() { |
346 | return Some(value.into()); | |
347 | } else { | |
348 | return None; // Cookie format error | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | None | |
354 | } | |
af53186e DM |
355 | |
356 | pub fn join(data: &Vec<String>, sep: char) -> String { | |
af53186e DM |
357 | let mut list = String::new(); |
358 | ||
359 | for item in data { | |
62ee2eb4 | 360 | if !list.is_empty() { |
6100071f WB |
361 | list.push(sep); |
362 | } | |
af53186e DM |
363 | list.push_str(item); |
364 | } | |
365 | ||
366 | list | |
367 | } | |
ff7049d4 | 368 | |
002a191a DM |
369 | /// Detect modified configuration files |
370 | /// | |
add5861e | 371 | /// This function fails with a reasonable error message if checksums do not match. |
002a191a DM |
372 | pub fn detect_modified_configuration_file(digest1: &[u8;32], digest2: &[u8;32]) -> Result<(), Error> { |
373 | if digest1 != digest2 { | |
374 | bail!("detected modified configuration - file changed by other user? Try again."); | |
375 | } | |
376 | Ok(()) | |
377 | } | |
378 | ||
3578d99f DM |
379 | /// normalize uri path |
380 | /// | |
381 | /// Do not allow ".", "..", or hidden files ".XXXX" | |
382 | /// Also remove empty path components | |
383 | pub fn normalize_uri_path(path: &str) -> Result<(String, Vec<&str>), Error> { | |
3578d99f DM |
384 | let items = path.split('/'); |
385 | ||
386 | let mut path = String::new(); | |
387 | let mut components = vec![]; | |
388 | ||
389 | for name in items { | |
6100071f WB |
390 | if name.is_empty() { |
391 | continue; | |
392 | } | |
62ee2eb4 | 393 | if name.starts_with('.') { |
3578d99f DM |
394 | bail!("Path contains illegal components."); |
395 | } | |
396 | path.push('/'); | |
397 | path.push_str(name); | |
398 | components.push(name); | |
399 | } | |
400 | ||
401 | Ok((path, components)) | |
402 | } | |
403 | ||
97fab7aa | 404 | /// Helper to check result from std::process::Command output |
143b6545 DM |
405 | /// |
406 | /// The exit_code_check() function should return true if the exit code | |
407 | /// is considered successful. | |
408 | pub fn command_output( | |
409 | output: std::process::Output, | |
144006fa | 410 | exit_code_check: Option<fn(i32) -> bool>, |
e64b9f92 | 411 | ) -> Result<Vec<u8>, Error> { |
97fab7aa DM |
412 | |
413 | if !output.status.success() { | |
414 | match output.status.code() { | |
415 | Some(code) => { | |
143b6545 DM |
416 | let is_ok = match exit_code_check { |
417 | Some(check_fn) => check_fn(code), | |
418 | None => code == 0, | |
419 | }; | |
420 | if !is_ok { | |
97fab7aa DM |
421 | let msg = String::from_utf8(output.stderr) |
422 | .map(|m| if m.is_empty() { String::from("no error message") } else { m }) | |
423 | .unwrap_or_else(|_| String::from("non utf8 error message (suppressed)")); | |
424 | ||
425 | bail!("status code: {} - {}", code, msg); | |
426 | } | |
427 | } | |
428 | None => bail!("terminated by signal"), | |
429 | } | |
430 | } | |
431 | ||
e64b9f92 DM |
432 | Ok(output.stdout) |
433 | } | |
97fab7aa | 434 | |
e64b9f92 DM |
435 | /// Helper to check result from std::process::Command output, returns String. |
436 | /// | |
437 | /// The exit_code_check() function should return true if the exit code | |
438 | /// is considered successful. | |
439 | pub fn command_output_as_string( | |
440 | output: std::process::Output, | |
441 | exit_code_check: Option<fn(i32) -> bool>, | |
442 | ) -> Result<String, Error> { | |
443 | let output = command_output(output, exit_code_check)?; | |
444 | let output = String::from_utf8(output)?; | |
97fab7aa DM |
445 | Ok(output) |
446 | } | |
447 | ||
144006fa DM |
448 | pub fn run_command( |
449 | mut command: std::process::Command, | |
450 | exit_code_check: Option<fn(i32) -> bool>, | |
451 | ) -> Result<String, Error> { | |
452 | ||
453 | let output = command.output() | |
454 | .map_err(|err| format_err!("failed to execute {:?} - {}", command, err))?; | |
455 | ||
e64b9f92 | 456 | let output = crate::tools::command_output_as_string(output, exit_code_check) |
144006fa DM |
457 | .map_err(|err| format_err!("command {:?} failed - {}", command, err))?; |
458 | ||
459 | Ok(output) | |
460 | } | |
97fab7aa | 461 | |
ff7049d4 | 462 | pub fn fd_change_cloexec(fd: RawFd, on: bool) -> Result<(), Error> { |
6100071f | 463 | use nix::fcntl::{fcntl, FdFlag, F_GETFD, F_SETFD}; |
ff7049d4 WB |
464 | let mut flags = FdFlag::from_bits(fcntl(fd, F_GETFD)?) |
465 | .ok_or_else(|| format_err!("unhandled file flags"))?; // nix crate is stupid this way... | |
466 | flags.set(FdFlag::FD_CLOEXEC, on); | |
467 | fcntl(fd, F_SETFD(flags))?; | |
468 | Ok(()) | |
469 | } | |
9136f857 | 470 | |
9136f857 DM |
471 | static mut SHUTDOWN_REQUESTED: bool = false; |
472 | ||
473 | pub fn request_shutdown() { | |
6100071f WB |
474 | unsafe { |
475 | SHUTDOWN_REQUESTED = true; | |
476 | } | |
7a630df7 | 477 | crate::server::server_shutdown(); |
9136f857 DM |
478 | } |
479 | ||
480 | #[inline(always)] | |
481 | pub fn shutdown_requested() -> bool { | |
482 | unsafe { SHUTDOWN_REQUESTED } | |
483 | } | |
92da93b2 DM |
484 | |
485 | pub fn fail_on_shutdown() -> Result<(), Error> { | |
486 | if shutdown_requested() { | |
487 | bail!("Server shutdown requested - aborting task"); | |
488 | } | |
489 | Ok(()) | |
490 | } | |
d96bb7f1 | 491 | |
c4044009 WB |
492 | /// safe wrapper for `nix::unistd::pipe2` defaulting to `O_CLOEXEC` and guarding the file |
493 | /// descriptors. | |
efd1536e WB |
494 | pub fn pipe() -> Result<(Fd, Fd), Error> { |
495 | let (pin, pout) = nix::unistd::pipe2(nix::fcntl::OFlag::O_CLOEXEC)?; | |
496 | Ok((Fd(pin), Fd(pout))) | |
497 | } | |
2edc341b | 498 | |
c4044009 WB |
499 | /// safe wrapper for `nix::sys::socket::socketpair` defaulting to `O_CLOEXEC` and guarding the file |
500 | /// descriptors. | |
501 | pub fn socketpair() -> Result<(Fd, Fd), Error> { | |
502 | use nix::sys::socket; | |
503 | let (pa, pb) = socket::socketpair( | |
504 | socket::AddressFamily::Unix, | |
505 | socket::SockType::Stream, | |
506 | None, | |
507 | socket::SockFlag::SOCK_CLOEXEC, | |
508 | )?; | |
509 | Ok((Fd(pa), Fd(pb))) | |
510 | } | |
511 | ||
512 | ||
2edc341b DM |
513 | /// An easy way to convert types to Any |
514 | /// | |
515 | /// Mostly useful to downcast trait objects (see RpcEnvironment). | |
516 | pub trait AsAny { | |
dd5495d6 | 517 | fn as_any(&self) -> &dyn Any; |
2edc341b DM |
518 | } |
519 | ||
520 | impl<T: Any> AsAny for T { | |
6100071f WB |
521 | fn as_any(&self) -> &dyn Any { |
522 | self | |
523 | } | |
2edc341b | 524 | } |
8a1028e0 WB |
525 | |
526 | /// This used to be: `SIMPLE_ENCODE_SET` plus space, `"`, `#`, `<`, `>`, backtick, `?`, `{`, `}` | |
527 | pub const DEFAULT_ENCODE_SET: &AsciiSet = &percent_encoding::CONTROLS // 0..1f and 7e | |
528 | // The SIMPLE_ENCODE_SET adds space and anything >= 0x7e (7e itself is already included above) | |
529 | .add(0x20) | |
530 | .add(0x7f) | |
531 | // the DEFAULT_ENCODE_SET added: | |
532 | .add(b' ') | |
533 | .add(b'"') | |
534 | .add(b'#') | |
535 | .add(b'<') | |
536 | .add(b'>') | |
537 | .add(b'`') | |
538 | .add(b'?') | |
539 | .add(b'{') | |
540 | .add(b'}'); | |
386990ba WB |
541 | |
542 | /// Get an iterator over lines of a file, skipping empty lines and comments (lines starting with a | |
543 | /// `#`). | |
544 | pub fn file_get_non_comment_lines<P: AsRef<Path>>( | |
545 | path: P, | |
546 | ) -> Result<impl Iterator<Item = io::Result<String>>, Error> { | |
547 | let path = path.as_ref(); | |
548 | ||
549 | Ok(io::BufReader::new( | |
550 | File::open(path).map_err(|err| format_err!("error opening {:?}: {}", path, err))?, | |
551 | ) | |
552 | .lines() | |
553 | .filter_map(|line| match line { | |
554 | Ok(line) => { | |
555 | let line = line.trim(); | |
556 | if line.is_empty() || line.starts_with('#') { | |
557 | None | |
558 | } else { | |
559 | Some(Ok(line.to_string())) | |
560 | } | |
561 | } | |
562 | Err(err) => Some(Err(err)), | |
563 | })) | |
564 | } | |
e693818a | 565 | |
ac7513e3 DM |
566 | pub fn setup_safe_path_env() { |
567 | std::env::set_var("PATH", "/sbin:/bin:/usr/sbin:/usr/bin"); | |
568 | // Make %ENV safer - as suggested by https://perldoc.perl.org/perlsec.html | |
569 | for name in &["IFS", "CDPATH", "ENV", "BASH_ENV"] { | |
570 | std::env::remove_var(name); | |
571 | } | |
572 | } | |
cdf1da28 WB |
573 | |
574 | pub fn strip_ascii_whitespace(line: &[u8]) -> &[u8] { | |
575 | let line = match line.iter().position(|&b| !b.is_ascii_whitespace()) { | |
576 | Some(n) => &line[n..], | |
577 | None => return &[], | |
578 | }; | |
579 | match line.iter().rev().position(|&b| !b.is_ascii_whitespace()) { | |
580 | Some(n) => &line[..(line.len() - n)], | |
581 | None => &[], | |
582 | } | |
583 | } | |
1bc1d81a DM |
584 | |
585 | /// Seeks to start of file and computes the SHA256 hash | |
586 | pub fn compute_file_csum(file: &mut File) -> Result<([u8; 32], u64), Error> { | |
587 | ||
588 | file.seek(SeekFrom::Start(0))?; | |
589 | ||
590 | let mut hasher = openssl::sha::Sha256::new(); | |
591 | let mut buffer = proxmox::tools::vec::undefined(256*1024); | |
592 | let mut size: u64 = 0; | |
593 | ||
594 | loop { | |
595 | let count = match file.read(&mut buffer) { | |
596 | Ok(count) => count, | |
597 | Err(ref err) if err.kind() == std::io::ErrorKind::Interrupted => { | |
598 | continue; | |
599 | } | |
600 | Err(err) => return Err(err.into()), | |
601 | }; | |
602 | if count == 0 { | |
603 | break; | |
604 | } | |
605 | size += count as u64; | |
606 | hasher.update(&buffer[..count]); | |
607 | } | |
608 | ||
609 | let csum = hasher.finish(); | |
610 | ||
611 | Ok((csum, size)) | |
612 | } |