guest/net: Handle missing /etc/hostname gracefully

Janne Grunau · alyssarosenzweig · commit c9b574da3657 · 2024-10-08T06:18:47.000-04:00
The error handled in #74 was muvm-guest's network code. So fixing it here directly. Not sure if any of the binaries running in the guest actually care about /etc/hostname. Signed-off-by: Janne Grunau <janne-fdr@jannau.net>
diff --git a/crates/muvm/src/guest/net.rs b/crates/muvm/src/guest/net.rs
@@ -24,7 +24,7 @@ pub fn configure_network() -> Result<()> {
 
     {
         let hostname =
-            fs::read_to_string("/etc/hostname").context("Failed to read `/etc/hostname`")?;
+            fs::read_to_string("/etc/hostname").unwrap_or("placeholder-hostname".to_string());
         let hostname = if let Some((hostname, _)) = hostname.split_once('\n') {
             hostname.to_owned()
         } else {

Original file line number	Diff line number	Diff line change
`@@ -24,7 +24,7 @@ pub fn configure_network() -> Result<()> {`
`24`	`24`
`25`	`25`	`{`
`26`	`26`	`let hostname =`
`27`		- fs::read_to_string("/etc/hostname").context("Failed to read `/etc/hostname`")?;
	`27`	`+ fs::read_to_string("/etc/hostname").unwrap_or("placeholder-hostname".to_string());`
`28`	`28`	`let hostname = if let Some((hostname, _)) = hostname.split_once('\n') {`
`29`	`29`	`hostname.to_owned()`
`30`	`30`	`} else {`