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use std::{
os::unix::fs::PermissionsExt,
path::Path,
};
use clap::Parser;
use smol::{
use smol::fs::metadata;
fs::metadata,
};
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/// Also returns an error if the system hostname cannot be read or is not
/// valid UTF-8, or if mail server initialisation fails.
///
/// # Panics
/// Panics if configuring or serving the SMTP server fails.
async fn main (ex: &LocalExecutor<'_>) -> Result<()> {
let args = Args::parse();
let settings = {
// Load configuration defaults and overrides after checking file permissions.
let config_file = Path::new(&args.config);
if !config_file.try_exists().stack()? {
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\
Fix with: chmod 600 {config_file:?}",
meta.permissions().mode());
} }
let settings: config::Config = config::Config::builder()
.set_default("api_gateway", "https://api.telegram.org").stack()?
.set_default("fields", vec!["date", "from", "subject"]).stack()?
.set_default("hostname", "smtp.2.tg").stack()?
.set_default("listen_on", "0.0.0.0:1025").stack()?
.set_default("domains", vec!["localhost",
hostname::get().context("Failed to get current hostname")?
.to_str().context("Can't convert hostname to string, bad UTF-8?")?]).stack()?
.add_source(config::File::from(config_file))
.build()
.with_context(|| format!(
"Failed to parse configuration file: {config_file:?}\n\
Check syntax against smtp2tg.toml.example.\n\
Common issues: missing quotes, trailing commas in inline tables, or invalid types."
))?;
let config_file = Path::new(&args.config);
if !config_file.try_exists().stack()? {
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\
Fix with: chmod 600 {config_file:?}",
meta.permissions().mode());
} }
config::Config::builder()
.set_default("api_gateway", "https://api.telegram.org").stack()?
.set_default("fields", vec!["date", "from", "subject"]).stack()?
.set_default("hostname", "smtp.2.tg").stack()?
.set_default("listen_on", "0.0.0.0:1025").stack()?
.set_default("domains", vec!["localhost",
hostname::get().context("Failed to get current hostname")?
.to_str().context("Can't convert hostname to string, bad UTF-8?")?]).stack()?
.add_source(config::File::from(config_file))
.build()
.with_context(|| format!(
"Failed to parse configuration file: {config_file:?}\n\
Check syntax against smtp2tg.toml.example.\n\
Common issues: missing quotes, trailing commas in inline tables, 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
|