Add freebsd sysinfo for telemetry

Author: firegrass

prdoc/pr_7985.prdoc

@@ -0,0 +1,9 @@
+title: Collect system infomation on FreeBSD OS
+author: firegrass
+doc:
+  - audience: Node Operator
+    description: |
+      Adds support for collecting system information on FreeBSD. This allows Decentralized Nodes operators to be compliant with the Telemetry rule without maintaining patches.
+crates:
+- name: sc-sysinfo
+  bump: minor

substrate/client/sysinfo/src/lib.rs

@@ -23,6 +23,8 @@ use futures::prelude::*;
 use std::time::Duration;
 
 mod sysinfo;
+#[cfg(target_os = "freebsd")]
+mod sysinfo_freebsd;
 #[cfg(target_os = "linux")]
 mod sysinfo_linux;
 

substrate/client/sysinfo/src/sysinfo.rs

@@ -317,6 +317,9 @@ pub fn gather_sysinfo() -> SysInfo {
 	#[cfg(target_os = "linux")]
 	crate::sysinfo_linux::gather_linux_sysinfo(&mut sysinfo);
 
+	#[cfg(target_os = "freebsd")]
+	crate::sysinfo_freebsd::gather_freebsd_sysinfo(&mut sysinfo);
+
 	sysinfo
 }
 

substrate/client/sysinfo/src/sysinfo_freebsd.rs

@@ -0,0 +1,49 @@
+// This file is part of Substrate.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+use sc_telemetry::SysInfo;
+use std::process::Command;
+use std::str;
+
+fn sysctl_output(name: &str) -> Option<String> {
+	let output = Command::new("sysctl").arg("-n").arg(name).output().ok()?;
+	let stdout = String::from_utf8_lossy(&output.stdout).trim().to_string();
+	Some(stdout)
+}
+
+pub fn gather_freebsd_sysinfo(sysinfo: &mut SysInfo) {
+	if let Some(cpu_model) = sysctl_output("hw.model") {
+		sysinfo.cpu = Some(cpu_model);
+	}
+
+	if let Some(cores) = sysctl_output("kern.smp.cores") {
+		sysinfo.core_count = cores.parse().ok();
+	}
+
+	if let Some(memory) = sysctl_output("hw.physmem") {
+		sysinfo.memory = memory.parse().ok();
+	}
+
+	if let Some(virtualization) = sysctl_output("kern.vm_guest") {
+		sysinfo.is_virtual_machine = Some(virtualization != "none");
+	}
+
+	if let Some(freebsd_version) = sysctl_output("kern.osrelease") {
+		sysinfo.linux_distro = Some(freebsd_version);
+	}
+}