refactor time functions to tools

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/tools.rs

@@ -9,6 +9,7 @@ use std::io::{self, BufRead, ErrorKind, Read};
 use std::os::unix::io::{AsRawFd, RawFd};
 use std::path::Path;
 use std::time::Duration;
+use std::time::{SystemTime, SystemTimeError, UNIX_EPOCH};
 
 use anyhow::{bail, format_err, Error};
 use serde_json::Value;
@@ -609,3 +610,16 @@ pub fn file_get_non_comment_lines<P: AsRef<Path>>(
         Err(err) => Some(Err(err)),
     }))
 }
+
+pub fn epoch_now() -> Result<Duration, SystemTimeError> {
+    SystemTime::now().duration_since(UNIX_EPOCH)
+}
+
+pub fn epoch_now_f64() -> Result<f64, SystemTimeError> {
+    Ok(epoch_now()?.as_secs_f64())
+}
+
+pub fn epoch_now_u64() -> Result<u64, SystemTimeError> {
+    Ok(epoch_now()?.as_secs())
+}
+