fix(network/linux): correctly handle subprocess errors

src/network/dns/linux.rs

@@ -19,14 +19,15 @@ pub fn add_dns_servers(dns_servers: &[IpAddr], interface_name: &str) -> Result<(
         .join("\n");
 
     let mut process = run_command(RESOLVCONF_COMMAND, set_args)?;
-    let mut process_in = process
-        .stdin
-        .take()
-        .ok_or(anyhow!("failed to open stdin"))?;
-
-    process_in
-        .write_all(input.as_bytes())
-        .context("failed to write to stdin")?;
+
+    if let Some(mut stdin) = process.stdin.take() {
+        stdin
+            .write_all(input.as_bytes())
+            .context("failed to write to stdin")?;
+    } else {
+        return Err(anyhow!("failed to open stdin"));
+    }
+
     let output = process
         .wait_with_output()
         .context("failed to wait for process to exit")?;

src/network/route/posix.rs

@@ -1,5 +1,5 @@
 use crate::utils::command::run_command;
-use anyhow::{anyhow, Result};
+use anyhow::{anyhow, Context, Result};
 use ipnet::IpNet;
 use std::net::IpAddr;
 
@@ -40,7 +40,9 @@ fn add_route(network: &IpNet, gateway: &IpAddr) -> Result<()> {
     let route_program = route_command_split[0];
     let route_args = &route_command_split[1..];
 
-    let output = run_command(route_program, route_args)?.wait_with_output()?;
+    let output = run_command(route_program, route_args)?
+        .wait_with_output()
+        .context("failed to create child process")?;
 
     if !output.status.success() {
         return Err(anyhow!(