49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
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use failure::*;
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use crate::tools;
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use lazy_static::lazy_static;
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use regex::Regex;
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pub struct ProcFsPidStat {
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pub status: u8,
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pub utime: u64,
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pub stime: u64,
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pub starttime: u64,
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pub vsize: u64,
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pub rss: i64,
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}
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pub fn read_proc_pid_stat(pid: nix::unistd::Pid) -> Result<ProcFsPidStat, Error> {
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let statstr = tools::file_read_firstline(format!("/proc/{}/stat", pid))?;
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lazy_static! {
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static ref REGEX: Regex = Regex::new(r"^(?P<pid>\d+) \(.*\) (?P<status>\S) -?\d+ -?\d+ -?\d+ -?\d+ -?\d+ \d+ \d+ \d+ \d+ \d+ (?P<utime>\d+) (?P<stime>\d+) -?\d+ -?\d+ -?\d+ -?\d+ -?\d+ 0 (?P<starttime>\d+) (?P<vsize>\d+) (?P<rss>-?\d+) \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ -?\d+ -?\d+ \d+ \d+ \d+").unwrap();
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}
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if let Some(cap) = REGEX.captures(&statstr) {
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if pid != nix::unistd::Pid::from_raw(cap["pid"].parse::<i32>().unwrap()) {
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bail!("unable to read pid stat for process '{}' - got wrong pid", pid);
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}
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return Ok(ProcFsPidStat {
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status: cap["status"].as_bytes()[0],
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utime: cap["utime"].parse::<u64>().unwrap(),
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stime: cap["stime"].parse::<u64>().unwrap(),
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starttime: cap["starttime"].parse::<u64>().unwrap(),
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vsize: cap["vsize"].parse::<u64>().unwrap(),
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rss: cap["rss"].parse::<i64>().unwrap() * 4096,
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});
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}
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bail!("unable to read pid stat for process '{}'", pid);
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}
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pub fn read_proc_starttime(pid: nix::unistd::Pid) -> Result<u64, Error> {
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let info = read_proc_pid_stat(pid)?;
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Ok(info.starttime)
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}
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