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sys: add read_proc_pid_stat test

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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2019-10-22 12:08:26 +02:00
parent 1ae66863d1
commit b294fb1314
1 changed files with 25 additions and 1 deletions
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26
proxmox-sys/src/linux/procfs.rs
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@ -33,8 +33,13 @@ pub struct ProcFsPidStat {
}
pub fn read_proc_pid_stat(pid: libc::pid_t) -> Result<ProcFsPidStat, Error> {
let statstr = file_read_firstline(format!("/proc/{}/stat", pid))?;
parse_proc_pid_stat(
pid,
std::str::from_utf8(&std::fs::read(format!("/proc/{}/stat", pid))?)?,
)
}
fn parse_proc_pid_stat(pid: libc::pid_t, statstr: &str) -> Result<ProcFsPidStat, Error> {
lazy_static! {
static ref REGEX: Regex = Regex::new(concat!(
r"^(?P<pid>\d+) \(.*\) (?P<status>\S) -?\d+ -?\d+ -?\d+ -?\d+ -?\d+ \d+ \d+ \d+ \d+ \d+ ",
@ -65,6 +70,25 @@ pub fn read_proc_pid_stat(pid: libc::pid_t) -> Result<ProcFsPidStat, Error> {
bail!("unable to read pid stat for process '{}'", pid);
}
#[test]
fn test_read_proc_pid_stat() {
let stat = parse_proc_pid_stat(
28900,
"28900 (zsh) S 22489 28900 28900 34826 10252 4194304 6851 5946551 0 2344 6 3 25205 1413 \
20 0 1 0 287592 12496896 1910 18446744073709551615 93999319244800 93999319938061 \
140722897984224 0 0 0 2 3686404 134295555 1 0 0 17 10 0 0 0 0 0 93999320079088 \
93999320108360 93999343271936 140722897992565 140722897992570 140722897992570 \
140722897993707 0",
)
.expect("successful parsing of a sample /proc/PID/stat entry");
assert_eq!(stat.status, b'S');
assert_eq!(stat.utime, 6);
assert_eq!(stat.stime, 3);
assert_eq!(stat.starttime, 287592);
assert_eq!(stat.vsize, 12496896);
assert_eq!(stat.rss, 1910 * 4096);
}
pub fn read_proc_starttime(pid: libc::pid_t) -> Result<u64, Error> {
let info = read_proc_pid_stat(pid)?;