tracexec_core/
timestamp.rs

1use std::{borrow::Cow, sync::LazyLock};
2
3use chrono::{DateTime, Local};
4use nutype::nutype;
5
6#[nutype(
7  validate(with = validate_strftime, error = Cow<'static,str>),
8  derive(Debug, Clone, Serialize, Deserialize, Deref, FromStr)
9)]
10pub struct TimestampFormat(String);
11
12fn validate_strftime(fmt: &str) -> Result<(), Cow<'static, str>> {
13  if fmt.contains("\n") {
14    return Err("inline timestamp format string should not contain newline(s)".into());
15  }
16  Ok(())
17}
18
19pub type Timestamp = DateTime<Local>;
20
21pub fn ts_from_boot_ns(boot_ns: u64) -> Timestamp {
22  DateTime::from_timestamp_nanos((*BOOT_TIME + boot_ns) as i64).into()
23}
24
25static BOOT_TIME: LazyLock<u64> = LazyLock::new(|| {
26  let content = std::fs::read_to_string("/proc/stat").expect("Failed to read /proc/stat");
27  for line in content.lines() {
28    if line.starts_with("btime") {
29      return line
30        .split(' ')
31        .nth(1)
32        .unwrap()
33        .parse::<u64>()
34        .expect("Failed to parse btime in /proc/stat")
35        * 1_000_000_000;
36    }
37  }
38  panic!("btime is not available in /proc/stat. Am I running on Linux?")
39});
tracexec_core/timestamp.rs

tracexec_core/
timestamp.rs
