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<a href="#320" id="320">320</a>
|
||
<a href="#321" id="321">321</a>
|
||
<a href="#322" id="322">322</a>
|
||
<a href="#323" id="323">323</a>
|
||
<a href="#324" id="324">324</a>
|
||
<a href="#325" id="325">325</a>
|
||
<a href="#326" id="326">326</a>
|
||
<a href="#327" id="327">327</a>
|
||
<a href="#328" id="328">328</a>
|
||
<a href="#329" id="329">329</a>
|
||
<a href="#330" id="330">330</a>
|
||
<a href="#331" id="331">331</a>
|
||
<a href="#332" id="332">332</a>
|
||
<a href="#333" id="333">333</a>
|
||
<a href="#334" id="334">334</a>
|
||
<a href="#335" id="335">335</a>
|
||
<a href="#336" id="336">336</a>
|
||
<a href="#337" id="337">337</a>
|
||
<a href="#338" id="338">338</a>
|
||
<a href="#339" id="339">339</a>
|
||
<a href="#340" id="340">340</a>
|
||
<a href="#341" id="341">341</a>
|
||
<a href="#342" id="342">342</a>
|
||
<a href="#343" id="343">343</a>
|
||
<a href="#344" id="344">344</a>
|
||
<a href="#345" id="345">345</a>
|
||
<a href="#346" id="346">346</a>
|
||
<a href="#347" id="347">347</a>
|
||
<a href="#348" id="348">348</a>
|
||
<a href="#349" id="349">349</a>
|
||
<a href="#350" id="350">350</a>
|
||
<a href="#351" id="351">351</a>
|
||
<a href="#352" id="352">352</a>
|
||
<a href="#353" id="353">353</a>
|
||
<a href="#354" id="354">354</a>
|
||
<a href="#355" id="355">355</a>
|
||
<a href="#356" id="356">356</a>
|
||
<a href="#357" id="357">357</a>
|
||
<a href="#358" id="358">358</a>
|
||
<a href="#359" id="359">359</a>
|
||
<a href="#360" id="360">360</a>
|
||
<a href="#361" id="361">361</a>
|
||
<a href="#362" id="362">362</a>
|
||
<a href="#363" id="363">363</a>
|
||
<a href="#364" id="364">364</a>
|
||
<a href="#365" id="365">365</a>
|
||
<a href="#366" id="366">366</a>
|
||
<a href="#367" id="367">367</a>
|
||
<a href="#368" id="368">368</a>
|
||
<a href="#369" id="369">369</a>
|
||
<a href="#370" id="370">370</a>
|
||
<a href="#371" id="371">371</a>
|
||
<a href="#372" id="372">372</a>
|
||
<a href="#373" id="373">373</a>
|
||
<a href="#374" id="374">374</a>
|
||
<a href="#375" id="375">375</a>
|
||
<a href="#376" id="376">376</a>
|
||
<a href="#377" id="377">377</a>
|
||
<a href="#378" id="378">378</a>
|
||
<a href="#379" id="379">379</a>
|
||
<a href="#380" id="380">380</a>
|
||
<a href="#381" id="381">381</a>
|
||
<a href="#382" id="382">382</a>
|
||
<a href="#383" id="383">383</a>
|
||
<a href="#384" id="384">384</a>
|
||
<a href="#385" id="385">385</a>
|
||
<a href="#386" id="386">386</a>
|
||
<a href="#387" id="387">387</a>
|
||
<a href="#388" id="388">388</a>
|
||
<a href="#389" id="389">389</a>
|
||
</pre><pre class="rust"><code><span class="comment">// * This file is part of the uutils coreutils package.
|
||
// *
|
||
// * (c) Alex Lyon <arcterus@mail.com>
|
||
// *
|
||
// * For the full copyright and license information, please view the LICENSE
|
||
// * file that was distributed with this source code.
|
||
|
||
// spell-checker:ignore (ToDO) tstr sigstr cmdname setpgid sigchld getpid
|
||
</span><span class="kw">mod </span>status;
|
||
|
||
<span class="kw">use </span><span class="kw">crate</span>::status::ExitStatus;
|
||
<span class="kw">use </span>clap::{crate_version, Arg, ArgAction, Command};
|
||
<span class="kw">use </span>std::io::ErrorKind;
|
||
<span class="kw">use </span>std::os::unix::process::ExitStatusExt;
|
||
<span class="kw">use </span>std::process::{<span class="self">self</span>, Child, Stdio};
|
||
<span class="kw">use </span>std::time::Duration;
|
||
<span class="kw">use </span>uucore::display::Quotable;
|
||
<span class="kw">use </span>uucore::error::{UClapError, UResult, USimpleError, UUsageError};
|
||
<span class="kw">use </span>uucore::process::ChildExt;
|
||
<span class="kw">use </span>uucore::signals::{signal_by_name_or_value, signal_name_by_value};
|
||
<span class="kw">use </span>uucore::{format_usage, show_error};
|
||
|
||
<span class="kw">static </span>ABOUT: <span class="kw-2">&</span>str = <span class="string">"Start COMMAND, and kill it if still running after DURATION."</span>;
|
||
<span class="kw">const </span>USAGE: <span class="kw-2">&</span>str = <span class="string">"{} [OPTION] DURATION COMMAND..."</span>;
|
||
|
||
<span class="kw">pub mod </span>options {
|
||
<span class="kw">pub static </span>FOREGROUND: <span class="kw-2">&</span>str = <span class="string">"foreground"</span>;
|
||
<span class="kw">pub static </span>KILL_AFTER: <span class="kw-2">&</span>str = <span class="string">"kill-after"</span>;
|
||
<span class="kw">pub static </span>SIGNAL: <span class="kw-2">&</span>str = <span class="string">"signal"</span>;
|
||
<span class="kw">pub static </span>PRESERVE_STATUS: <span class="kw-2">&</span>str = <span class="string">"preserve-status"</span>;
|
||
<span class="kw">pub static </span>VERBOSE: <span class="kw-2">&</span>str = <span class="string">"verbose"</span>;
|
||
|
||
<span class="comment">// Positional args.
|
||
</span><span class="kw">pub static </span>DURATION: <span class="kw-2">&</span>str = <span class="string">"duration"</span>;
|
||
<span class="kw">pub static </span>COMMAND: <span class="kw-2">&</span>str = <span class="string">"command"</span>;
|
||
}
|
||
|
||
<span class="kw">struct </span>Config {
|
||
foreground: bool,
|
||
kill_after: <span class="prelude-ty">Option</span><Duration>,
|
||
signal: usize,
|
||
duration: Duration,
|
||
preserve_status: bool,
|
||
verbose: bool,
|
||
|
||
command: Vec<String>,
|
||
}
|
||
|
||
<span class="kw">impl </span>Config {
|
||
<span class="kw">fn </span>from(options: <span class="kw-2">&</span>clap::ArgMatches) -> UResult<<span class="self">Self</span>> {
|
||
<span class="kw">let </span>signal = <span class="kw">match </span>options.get_one::<String>(options::SIGNAL) {
|
||
<span class="prelude-val">Some</span>(signal_) => {
|
||
<span class="kw">let </span>signal_result = signal_by_name_or_value(signal_);
|
||
<span class="kw">match </span>signal_result {
|
||
<span class="prelude-val">None </span>=> {
|
||
<span class="kw">return </span><span class="prelude-val">Err</span>(UUsageError::new(
|
||
ExitStatus::TimeoutFailed.into(),
|
||
<span class="macro">format!</span>(<span class="string">"{}: invalid signal"</span>, signal_.quote()),
|
||
))
|
||
}
|
||
<span class="prelude-val">Some</span>(signal_value) => signal_value,
|
||
}
|
||
}
|
||
<span class="kw">_ </span>=> uucore::signals::signal_by_name_or_value(<span class="string">"TERM"</span>).unwrap(),
|
||
};
|
||
|
||
<span class="kw">let </span>kill_after = <span class="kw">match </span>options.get_one::<String>(options::KILL_AFTER) {
|
||
<span class="prelude-val">None </span>=> <span class="prelude-val">None</span>,
|
||
<span class="prelude-val">Some</span>(kill_after) => <span class="kw">match </span>uucore::parse_time::from_str(kill_after) {
|
||
<span class="prelude-val">Ok</span>(k) => <span class="prelude-val">Some</span>(k),
|
||
<span class="prelude-val">Err</span>(err) => <span class="kw">return </span><span class="prelude-val">Err</span>(UUsageError::new(ExitStatus::TimeoutFailed.into(), err)),
|
||
},
|
||
};
|
||
|
||
<span class="kw">let </span>duration = <span class="kw">match </span>uucore::parse_time::from_str(
|
||
options.get_one::<String>(options::DURATION).unwrap(),
|
||
) {
|
||
<span class="prelude-val">Ok</span>(duration) => duration,
|
||
<span class="prelude-val">Err</span>(err) => <span class="kw">return </span><span class="prelude-val">Err</span>(UUsageError::new(ExitStatus::TimeoutFailed.into(), err)),
|
||
};
|
||
|
||
<span class="kw">let </span>preserve_status: bool = options.get_flag(options::PRESERVE_STATUS);
|
||
<span class="kw">let </span>foreground = options.get_flag(options::FOREGROUND);
|
||
<span class="kw">let </span>verbose = options.get_flag(options::VERBOSE);
|
||
|
||
<span class="kw">let </span>command = options
|
||
.get_many::<String>(options::COMMAND)
|
||
.unwrap()
|
||
.map(String::from)
|
||
.collect::<Vec<<span class="kw">_</span>>>();
|
||
|
||
<span class="prelude-val">Ok</span>(<span class="self">Self </span>{
|
||
foreground,
|
||
kill_after,
|
||
signal,
|
||
duration,
|
||
preserve_status,
|
||
verbose,
|
||
command,
|
||
})
|
||
}
|
||
}
|
||
|
||
<span class="attr">#[uucore::main]
|
||
</span><span class="kw">pub fn </span>uumain(args: <span class="kw">impl </span>uucore::Args) -> UResult<()> {
|
||
<span class="kw">let </span>args = args.collect_lossy();
|
||
|
||
<span class="kw">let </span>matches = uu_app().try_get_matches_from(args).with_exit_code(<span class="number">125</span>)<span class="question-mark">?</span>;
|
||
|
||
<span class="kw">let </span>config = Config::from(<span class="kw-2">&</span>matches)<span class="question-mark">?</span>;
|
||
timeout(
|
||
<span class="kw-2">&</span>config.command,
|
||
config.duration,
|
||
config.signal,
|
||
config.kill_after,
|
||
config.foreground,
|
||
config.preserve_status,
|
||
config.verbose,
|
||
)
|
||
}
|
||
|
||
<span class="kw">pub fn </span>uu_app() -> Command {
|
||
Command::new(<span class="string">"timeout"</span>)
|
||
.version(<span class="macro">crate_version!</span>())
|
||
.about(ABOUT)
|
||
.override_usage(format_usage(USAGE))
|
||
.arg(
|
||
Arg::new(options::FOREGROUND)
|
||
.long(options::FOREGROUND)
|
||
.help(
|
||
<span class="string">"when not running timeout directly from a shell prompt, allow \
|
||
COMMAND to read from the TTY and get TTY signals; in this mode, \
|
||
children of COMMAND will not be timed out"</span>,
|
||
)
|
||
.action(ArgAction::SetTrue),
|
||
)
|
||
.arg(
|
||
Arg::new(options::KILL_AFTER)
|
||
.long(options::KILL_AFTER)
|
||
.short(<span class="string">'k'</span>)
|
||
.help(
|
||
<span class="string">"also send a KILL signal if COMMAND is still running this long \
|
||
after the initial signal was sent"</span>,
|
||
),
|
||
)
|
||
.arg(
|
||
Arg::new(options::PRESERVE_STATUS)
|
||
.long(options::PRESERVE_STATUS)
|
||
.help(<span class="string">"exit with the same status as COMMAND, even when the command times out"</span>)
|
||
.action(ArgAction::SetTrue),
|
||
)
|
||
.arg(
|
||
Arg::new(options::SIGNAL)
|
||
.short(<span class="string">'s'</span>)
|
||
.long(options::SIGNAL)
|
||
.help(
|
||
<span class="string">"specify the signal to be sent on timeout; SIGNAL may be a name like \
|
||
'HUP' or a number; see 'kill -l' for a list of signals"</span>,
|
||
)
|
||
.value_name(<span class="string">"SIGNAL"</span>),
|
||
)
|
||
.arg(
|
||
Arg::new(options::VERBOSE)
|
||
.short(<span class="string">'v'</span>)
|
||
.long(options::VERBOSE)
|
||
.help(<span class="string">"diagnose to stderr any signal sent upon timeout"</span>)
|
||
.action(ArgAction::SetTrue),
|
||
)
|
||
.arg(Arg::new(options::DURATION).required(<span class="bool-val">true</span>))
|
||
.arg(
|
||
Arg::new(options::COMMAND)
|
||
.required(<span class="bool-val">true</span>)
|
||
.action(ArgAction::Append)
|
||
.value_hint(clap::ValueHint::CommandName),
|
||
)
|
||
.trailing_var_arg(<span class="bool-val">true</span>)
|
||
.infer_long_args(<span class="bool-val">true</span>)
|
||
}
|
||
|
||
<span class="doccomment">/// Remove pre-existing SIGCHLD handlers that would make waiting for the child's exit code fail.
|
||
</span><span class="kw">fn </span>unblock_sigchld() {
|
||
<span class="kw">unsafe </span>{
|
||
nix::sys::signal::signal(
|
||
nix::sys::signal::Signal::SIGCHLD,
|
||
nix::sys::signal::SigHandler::SigDfl,
|
||
)
|
||
.unwrap();
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Report that a signal is being sent if the verbose flag is set.
|
||
</span><span class="kw">fn </span>report_if_verbose(signal: usize, cmd: <span class="kw-2">&</span>str, verbose: bool) {
|
||
<span class="kw">if </span>verbose {
|
||
<span class="kw">let </span>s = signal_name_by_value(signal).unwrap();
|
||
<span class="macro">show_error!</span>(<span class="string">"sending signal {} to command {}"</span>, s, cmd.quote());
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn </span>send_signal(process: <span class="kw-2">&mut </span>Child, signal: usize, foreground: bool) {
|
||
<span class="comment">// NOTE: GNU timeout doesn't check for errors of signal.
|
||
// The subprocess might have exited just after the timeout.
|
||
// Sending a signal now would return "No such process", but we should still try to kill the children.
|
||
</span><span class="kw">_ </span>= process.send_signal(signal);
|
||
<span class="kw">if </span>!foreground {
|
||
<span class="kw">_ </span>= process.send_signal_group(signal);
|
||
<span class="kw">let </span>kill_signal = signal_by_name_or_value(<span class="string">"KILL"</span>).unwrap();
|
||
<span class="kw">let </span>continued_signal = signal_by_name_or_value(<span class="string">"CONT"</span>).unwrap();
|
||
<span class="kw">if </span>signal != kill_signal && signal != continued_signal {
|
||
<span class="kw">_ </span>= process.send_signal(continued_signal);
|
||
<span class="kw">_ </span>= process.send_signal_group(continued_signal);
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Wait for a child process and send a kill signal if it does not terminate.
|
||
///
|
||
/// This function waits for the child `process` for the time period
|
||
/// given by `duration`. If the child process does not terminate
|
||
/// within that time, we send the `SIGKILL` signal to it. If `verbose`
|
||
/// is `true`, then a message is printed to `stderr` when that
|
||
/// happens.
|
||
///
|
||
/// If the child process terminates within the given time period and
|
||
/// `preserve_status` is `true`, then the status code of the child
|
||
/// process is returned. If the child process terminates within the
|
||
/// given time period and `preserve_status` is `false`, then 124 is
|
||
/// returned. If the child does not terminate within the time period,
|
||
/// then 137 is returned. Finally, if there is an error while waiting
|
||
/// for the child process to terminate, then 124 is returned.
|
||
///
|
||
/// # Errors
|
||
///
|
||
/// If there is a problem sending the `SIGKILL` signal or waiting for
|
||
/// the process after that signal is sent.
|
||
</span><span class="kw">fn </span>wait_or_kill_process(
|
||
process: <span class="kw-2">&mut </span>Child,
|
||
cmd: <span class="kw-2">&</span>str,
|
||
duration: Duration,
|
||
preserve_status: bool,
|
||
foreground: bool,
|
||
verbose: bool,
|
||
) -> std::io::Result<i32> {
|
||
<span class="kw">match </span>process.wait_or_timeout(duration) {
|
||
<span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(status)) => {
|
||
<span class="kw">if </span>preserve_status {
|
||
<span class="prelude-val">Ok</span>(status.code().unwrap_or_else(|| status.signal().unwrap()))
|
||
} <span class="kw">else </span>{
|
||
<span class="prelude-val">Ok</span>(ExitStatus::TimeoutFailed.into())
|
||
}
|
||
}
|
||
<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) => {
|
||
<span class="kw">let </span>signal = signal_by_name_or_value(<span class="string">"KILL"</span>).unwrap();
|
||
report_if_verbose(signal, cmd, verbose);
|
||
send_signal(process, signal, foreground);
|
||
process.wait()<span class="question-mark">?</span>;
|
||
<span class="prelude-val">Ok</span>(ExitStatus::SignalSent(signal).into())
|
||
}
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(ExitStatus::WaitingFailed.into()),
|
||
}
|
||
}
|
||
|
||
<span class="attr">#[cfg(unix)]
|
||
</span><span class="kw">fn </span>preserve_signal_info(signal: libc::c_int) -> libc::c_int {
|
||
<span class="comment">// This is needed because timeout is expected to preserve the exit
|
||
// status of its child. It is not the case that utilities have a
|
||
// single simple exit code, that's an illusion some shells
|
||
// provide. Instead exit status is really two numbers:
|
||
//
|
||
// - An exit code if the program ran to completion
|
||
//
|
||
// - A signal number if the program was terminated by a signal
|
||
//
|
||
// The easiest way to preserve the latter seems to be to kill
|
||
// ourselves with whatever signal our child exited with, which is
|
||
// what the following is intended to accomplish.
|
||
</span><span class="kw">unsafe </span>{
|
||
libc::kill(libc::getpid(), signal);
|
||
}
|
||
signal
|
||
}
|
||
|
||
<span class="attr">#[cfg(not(unix))]
|
||
</span><span class="kw">fn </span>preserve_signal_info(signal: libc::c_int) -> libc::c_int {
|
||
<span class="comment">// Do nothing
|
||
</span>signal
|
||
}
|
||
|
||
<span class="attr">#[cfg(unix)]
|
||
</span><span class="kw">fn </span>enable_pipe_errors() -> std::io::Result<()> {
|
||
<span class="kw">let </span>ret = <span class="kw">unsafe </span>{ libc::signal(libc::SIGPIPE, libc::SIG_DFL) };
|
||
<span class="kw">if </span>ret == libc::SIG_ERR {
|
||
<span class="kw">return </span><span class="prelude-val">Err</span>(std::io::Error::new(std::io::ErrorKind::Other, <span class="string">""</span>));
|
||
}
|
||
<span class="prelude-val">Ok</span>(())
|
||
}
|
||
|
||
<span class="attr">#[cfg(not(unix))]
|
||
</span><span class="kw">fn </span>enable_pipe_errors() -> std::io::Result<()> {
|
||
<span class="comment">// Do nothing.
|
||
</span><span class="prelude-val">Ok</span>(())
|
||
}
|
||
|
||
<span class="doccomment">/// TODO: Improve exit codes, and make them consistent with the GNU Coreutils exit codes.
|
||
|
||
</span><span class="kw">fn </span>timeout(
|
||
cmd: <span class="kw-2">&</span>[String],
|
||
duration: Duration,
|
||
signal: usize,
|
||
kill_after: <span class="prelude-ty">Option</span><Duration>,
|
||
foreground: bool,
|
||
preserve_status: bool,
|
||
verbose: bool,
|
||
) -> UResult<()> {
|
||
<span class="kw">if </span>!foreground {
|
||
<span class="kw">unsafe </span>{ libc::setpgid(<span class="number">0</span>, <span class="number">0</span>) };
|
||
}
|
||
|
||
enable_pipe_errors()<span class="question-mark">?</span>;
|
||
|
||
<span class="kw">let </span>process = <span class="kw-2">&mut </span>process::Command::new(<span class="kw-2">&</span>cmd[<span class="number">0</span>])
|
||
.args(<span class="kw-2">&</span>cmd[<span class="number">1</span>..])
|
||
.stdin(Stdio::inherit())
|
||
.stdout(Stdio::inherit())
|
||
.stderr(Stdio::inherit())
|
||
.spawn()
|
||
.map_err(|err| {
|
||
<span class="kw">let </span>status_code = <span class="kw">if </span>err.kind() == ErrorKind::NotFound {
|
||
<span class="comment">// FIXME: not sure which to use
|
||
</span><span class="number">127
|
||
</span>} <span class="kw">else </span>{
|
||
<span class="comment">// FIXME: this may not be 100% correct...
|
||
</span><span class="number">126
|
||
</span>};
|
||
USimpleError::new(status_code, <span class="macro">format!</span>(<span class="string">"failed to execute process: {err}"</span>))
|
||
})<span class="question-mark">?</span>;
|
||
unblock_sigchld();
|
||
<span class="comment">// Wait for the child process for the specified time period.
|
||
//
|
||
// If the process exits within the specified time period (the
|
||
// `Ok(Some(_))` arm), then return the appropriate status code.
|
||
//
|
||
// If the process does not exit within that time (the `Ok(None)`
|
||
// arm) and `kill_after` is specified, then try sending `SIGKILL`.
|
||
//
|
||
// TODO The structure of this block is extremely similar to the
|
||
// structure of `wait_or_kill_process()`. They can probably be
|
||
// refactored into some common function.
|
||
</span><span class="kw">match </span>process.wait_or_timeout(duration) {
|
||
<span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(status)) => <span class="prelude-val">Err</span>(status
|
||
.code()
|
||
.unwrap_or_else(|| preserve_signal_info(status.signal().unwrap()))
|
||
.into()),
|
||
<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) => {
|
||
report_if_verbose(signal, <span class="kw-2">&</span>cmd[<span class="number">0</span>], verbose);
|
||
send_signal(process, signal, foreground);
|
||
<span class="kw">match </span>kill_after {
|
||
<span class="prelude-val">None </span>=> {
|
||
<span class="kw">if </span>preserve_status {
|
||
<span class="prelude-val">Err</span>(ExitStatus::SignalSent(signal).into())
|
||
} <span class="kw">else </span>{
|
||
<span class="prelude-val">Err</span>(ExitStatus::CommandTimedOut.into())
|
||
}
|
||
}
|
||
<span class="prelude-val">Some</span>(kill_after) => {
|
||
<span class="kw">match </span>wait_or_kill_process(
|
||
process,
|
||
<span class="kw-2">&</span>cmd[<span class="number">0</span>],
|
||
kill_after,
|
||
preserve_status,
|
||
foreground,
|
||
verbose,
|
||
) {
|
||
<span class="prelude-val">Ok</span>(status) => <span class="prelude-val">Err</span>(status.into()),
|
||
<span class="prelude-val">Err</span>(e) => <span class="prelude-val">Err</span>(USimpleError::new(
|
||
ExitStatus::TimeoutFailed.into(),
|
||
<span class="macro">format!</span>(<span class="string">"{e}"</span>),
|
||
)),
|
||
}
|
||
}
|
||
}
|
||
}
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => {
|
||
<span class="comment">// We're going to return ERR_EXIT_STATUS regardless of
|
||
// whether `send_signal()` succeeds or fails
|
||
</span>send_signal(process, signal, foreground);
|
||
<span class="prelude-val">Err</span>(ExitStatus::TimeoutFailed.into())
|
||
}
|
||
}
|
||
}
|
||
</code></pre></div>
|
||
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