From e128fc879f4e69b62919ea2549bfcfea77ab99a2 Mon Sep 17 00:00:00 2001
From: Wolfgang Bumiller <w.bumiller@proxmox.com>
Date: Tue, 14 Jan 2020 12:05:04 +0100
Subject: [PATCH] sys: Add TryFrom<Pid> for PidStat

Since nix's Pid type is a strong type, we can add a TryFrom
implementation here as well.
This can later also have the equivalent TryFrom<PidFd>
variant.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
---
 proxmox-sys/src/linux/procfs.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/proxmox-sys/src/linux/procfs.rs b/proxmox-sys/src/linux/procfs.rs
index 23d73a76..f4b52eab 100644
--- a/proxmox-sys/src/linux/procfs.rs
+++ b/proxmox-sys/src/linux/procfs.rs
@@ -1,4 +1,5 @@
 use std::collections::HashSet;
+use std::convert::TryFrom;
 use std::fs::OpenOptions;
 use std::io::{BufRead, BufReader};
 use std::net::{Ipv4Addr, Ipv6Addr};
@@ -118,6 +119,14 @@ impl PidStat {
     }
 }
 
+impl TryFrom<Pid> for PidStat {
+    type Error = Error;
+
+    fn try_from(pid: Pid) -> Result<Self, Error> {
+        Self::read_for_pid(pid)
+    }
+}
+
 /// Read `/proc/PID/stat` for a pid.
 #[deprecated(note = "use `PidStat::read_for_pid`")]
 pub fn read_proc_pid_stat(pid: libc::pid_t) -> Result<PidStat, Error> {