Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Don't panic when parsing /proc/stat #7580

Merged
merged 1 commit into from
Nov 12, 2019
Merged

Don't panic when parsing /proc/stat #7580

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
38 changes: 19 additions & 19 deletions src/cargo/util/cpu.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -45,26 +45,26 @@ mod imp {
pub fn current() -> io::Result<State> {
let mut state = String::new();
File::open("/proc/stat")?.read_to_string(&mut state)?;
let mut parts = state.lines().next().unwrap().split_whitespace();
if parts.next() != Some("cpu") {
return Err(io::Error::new(
io::ErrorKind::Other,
"cannot parse /proc/stat",
));
}

Ok(State {
user: parts.next().unwrap().parse::<u64>().unwrap(),
nice: parts.next().unwrap().parse::<u64>().unwrap(),
system: parts.next().unwrap().parse::<u64>().unwrap(),
idle: parts.next().unwrap().parse::<u64>().unwrap(),
iowait: parts.next().unwrap().parse::<u64>().unwrap(),
irq: parts.next().unwrap().parse::<u64>().unwrap(),
softirq: parts.next().unwrap().parse::<u64>().unwrap(),
steal: parts.next().unwrap().parse::<u64>().unwrap(),
guest: parts.next().unwrap().parse::<u64>().unwrap(),
guest_nice: parts.next().unwrap().parse::<u64>().unwrap(),
})
(|| {
let mut parts = state.lines().next()?.split_whitespace();
if parts.next()? != "cpu" {
return None;
}
Some(State {
user: parts.next()?.parse::<u64>().ok()?,
nice: parts.next()?.parse::<u64>().ok()?,
system: parts.next()?.parse::<u64>().ok()?,
idle: parts.next()?.parse::<u64>().ok()?,
iowait: parts.next()?.parse::<u64>().ok()?,
irq: parts.next()?.parse::<u64>().ok()?,
softirq: parts.next()?.parse::<u64>().ok()?,
steal: parts.next()?.parse::<u64>().ok()?,
guest: parts.next()?.parse::<u64>().ok()?,
guest_nice: parts.next()?.parse::<u64>().ok()?,
})
})()
.ok_or_else(|| io::Error::new(io::ErrorKind::Other, "first line of /proc/stat malformed"))
}

pub fn pct_idle(prev: &State, next: &State) -> f64 {
Expand Down