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/// # Errors
/// Returns an error if configuration is invalid, files are inaccessible, or
/// server fails to start.
pub async fn async_main () -> Result<()> {
let args = Args::parse();
let config_file = Path::new(&args.config);
if !config_file.exists() {
bail!("can't read configuration from {config_file:?}");
bail!("Configuration file not found: {config_file:?}\n\
Hint: Ensure the file exists and the path is correct.");
};
{
let meta = metadata(config_file).await.stack()?;
if (!0o100600 & meta.permissions().mode()) > 0 {
bail!("Configuration file permissions are insecure {config_file:?}\n\
Current permissions: {:o}\n\
Required: 0600 (owner read/write only).\n\
bail!("other users can read or write config file {config_file:?}\n\
File permissions: {:o}", meta.permissions().mode());
}
Fix with: chmod 600 {config_file:?}",
meta.permissions().mode());
} }
}
.with_context(|| format!("[{config_file:?}] there was an error reading config\n\
\tplease consult \"smtp2tg.toml.example\" for details"))?;
.with_context(|| format!(
"Failed to parse configuration file: {config_file:?}\n\
Check syntax against smtp2tg.toml.example.\n\
Common issues: missing quotes, trailing commas, or invalid types."
))?;
let listen_on = settings.get_string("listen_on").stack()?;
let server_name = settings.get_string("hostname").stack()?;
let core = MailServer::new(settings)?;
let mut server = mailin_embedded::Server::new(core);
// TODO: remove unwraps when mailin-embedded bumps with better error handling
|