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#[macro_use]
extern crate uucore;
use std::io::ErrorKind;
use std::process::{Command, Stdio};
use std::time::Duration;
use uucore::process::ChildExt;
static NAME: &str = "timeout";
static VERSION: &str = env!("CARGO_PKG_VERSION");
const ERR_EXIT_STATUS: i32 = 125;
pub fn uumain(args: impl uucore::Args) -> i32 {
let args = args.collect_str();
let program = args[0].clone();
let mut opts = getopts::Options::new();
opts.optflag(
"",
"preserve-status",
"exit with the same status as COMMAND, even when the command times out",
);
opts.optflag("", "foreground", "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");
opts.optopt("k", "kill-after", "also send a KILL signal if COMMAND is still running this long after the initial signal was sent", "DURATION");
opts.optflag("s", "signal", "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");
opts.optflag("h", "help", "display this help and exit");
opts.optflag("V", "version", "output version information and exit");
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(f) => crash!(ERR_EXIT_STATUS, "{}", f),
};
if matches.opt_present("help") {
print!(
"{} {}
Usage:
{} [OPTION] DURATION COMMAND [ARG]...
{}",
NAME,
VERSION,
program,
&opts.usage("Start COMMAND, and kill it if still running after DURATION.")
);
} else if matches.opt_present("version") {
println!("{} {}", NAME, VERSION);
} else if matches.free.len() < 2 {
show_error!("missing an argument");
show_error!("for help, try '{0} --help'", program);
return ERR_EXIT_STATUS;
} else {
let status = matches.opt_present("preserve-status");
let foreground = matches.opt_present("foreground");
let kill_after = match matches.opt_str("kill-after") {
Some(tstr) => match uucore::parse_time::from_str(&tstr) {
Ok(time) => time,
Err(f) => {
show_error!("{}", f);
return ERR_EXIT_STATUS;
}
},
None => Duration::new(0, 0),
};
let signal = match matches.opt_str("signal") {
Some(sigstr) => match uucore::signals::signal_by_name_or_value(&sigstr) {
Some(sig) => sig,
None => {
show_error!("invalid signal '{}'", sigstr);
return ERR_EXIT_STATUS;
}
},
None => uucore::signals::signal_by_name_or_value("TERM").unwrap(),
};
let duration = match uucore::parse_time::from_str(&matches.free[0]) {
Ok(time) => time,
Err(f) => {
show_error!("{}", f);
return ERR_EXIT_STATUS;
}
};
return timeout(
&matches.free[1],
&matches.free[2..],
duration,
signal,
kill_after,
foreground,
status,
);
}
0
}
fn timeout(
cmdname: &str,
args: &[String],
duration: Duration,
signal: usize,
kill_after: Duration,
foreground: bool,
preserve_status: bool,
) -> i32 {
if !foreground {
unsafe { libc::setpgid(0, 0) };
}
let mut process = match Command::new(cmdname)
.args(args)
.stdin(Stdio::inherit())
.stdout(Stdio::inherit())
.stderr(Stdio::inherit())
.spawn()
{
Ok(p) => p,
Err(err) => {
show_error!("failed to execute process: {}", err);
if err.kind() == ErrorKind::NotFound {
return 127;
} else {
return 126;
}
}
};
match process.wait_or_timeout(duration) {
Ok(Some(status)) => status.code().unwrap_or_else(|| status.signal().unwrap()),
Ok(None) => {
return_if_err!(ERR_EXIT_STATUS, process.send_signal(signal));
match process.wait_or_timeout(kill_after) {
Ok(Some(status)) => {
if preserve_status {
status.code().unwrap_or_else(|| status.signal().unwrap())
} else {
124
}
}
Ok(None) => {
if kill_after == Duration::new(0, 0) {
return 124;
}
return_if_err!(
ERR_EXIT_STATUS,
process
.send_signal(uucore::signals::signal_by_name_or_value("KILL").unwrap())
);
return_if_err!(ERR_EXIT_STATUS, process.wait());
137
}
Err(_) => 124,
}
}
Err(_) => {
return_if_err!(ERR_EXIT_STATUS, process.send_signal(signal));
ERR_EXIT_STATUS
}
}
}