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forwarder: Make explicit root check

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Rather than generating a potentially misleading error message if the
socket bind fails, perform an explicit check for `root` for Hybrid
VSOCK.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
This commit is contained in:
James O. D. Hunt 2021-10-25 17:32:43 +01:00
parent e377578e08
commit b67fa9e450
1 changed files with 7 additions and 2 deletions
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9
src/trace-forwarder/src/server.rs
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@ -85,11 +85,16 @@ fn start_hybrid_vsock(
socket_path: &str,
dump_only: bool,
) -> Result<()> {
let effective = nix::unistd::Uid::effective();
if !effective.is_root() {
return Err(anyhow!("You need to be root"));
}
// Remove the socket if it already exists
let _ = std::fs::remove_file(socket_path);
let listener =
UnixListener::bind(socket_path).map_err(|e| anyhow!("You need to be root: {:?}", e))?;
let listener = UnixListener::bind(socket_path)?;
debug!(logger, "Waiting for connections";
"vsock-type" => "hybrid",