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//! the record is published, and on Windows until an updater acknowledges startup.
use super::PidBackend;
#[cfg(windows)]
use super::PidCommandKind;
use super::PidFileState;
use super::PidRecord;
use super::read_process_start_time;
use crate::managed_install::executable_identity;
use anyhow::Context;
use anyhow::Result;
use anyhow::bail;
use std::process::Stdio;
use tokio::fs;
use tokio::process::Command;
impl PidBackend {
pub(super) async fn start_inner(&self, replacement: Option<PidRecord>) -> Result<Option<u32>> {
#[cfg(windows)]
crate::backend::windows::ensure_not_elevated()?;
if let Some(parent) = self.pid_file.parent() {
codex_uds::prepare_private_socket_directory(parent)
.await
.with_context(|| format!("failed to create pid directory {}", parent.display()))?;
}
let reservation_lock = self.acquire_reservation_lock().await?;
loop {
match fs::OpenOptions::new()
.create_new(true)
.write(true)
.open(&self.pid_file)
.await
{
Ok(pid_file) => {
drop(pid_file);
break;
}
Err(err) if err.kind() == std::io::ErrorKind::AlreadyExists => {
match self.read_pid_file_state_with_lock_held().await? {
PidFileState::Missing => continue,
PidFileState::Running(record) => {
if replacement.as_ref() == Some(&record) {
break;
}
if replacement.is_some() {
if self.record_is_active(&record).await? {
bail!("updater ownership changed before handoff");
}
// A failed rollback may leave the dead successor's record.
break;
}
if self.record_is_active(&record).await? {
return Ok(None);
}
let _ = fs::remove_file(&self.pid_file).await;
continue;
}
PidFileState::Starting => {
unreachable!("lock holder cannot observe starting")
}
}
}
Err(err) => {
return Err(err).with_context(|| {
format!("failed to reserve pid file {}", self.pid_file.display())
});
}
}
}
// Pin the selected release across installer symlink/junction retargeting.
let codex_bin = fs::canonicalize(&self.codex_bin)
.await
.unwrap_or_else(|_| self.codex_bin.clone());
let launched_identity =
if matches!(self.command_kind, super::PidCommandKind::AppServer { .. }) {
executable_identity(&codex_bin).await.ok()
} else {
None
};
let mut command = Command::new(&codex_bin);
let stderr_log = match self.open_stderr_log().await {
Ok(stderr_log) => stderr_log,
Err(err) => {
if replacement.is_none() {
let _ = fs::remove_file(&self.pid_file).await;
}
return Err(err);
}
};
command
.args(self.command_args())
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::from(stderr_log.into_std().await));
// Older or pinned managed binaries may predate this optional startup flag.
let managed_app_server =
matches!(self.command_kind, super::PidCommandKind::AppServer { .. });
if managed_app_server
&& matches!(
tokio::time::timeout(
std::time::Duration::from_secs(5),
Command::new(&codex_bin)
.args(["app-server", "--managed-daemon", "--help"])
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::null())
.kill_on_drop(true)
.status(),
).await,
Ok(Ok(status)) if status.success()
)
{
command.arg("--managed-daemon");
} else if managed_app_server {
let codex_home = self
.pid_file
.parent()
.and_then(std::path::Path::parent)
.context("daemon pid path has no Codex home")?;
let recovery_file = codex_app_server_transport::daemon_recovery_file_path(codex_home);
match fs::remove_file(&recovery_file).await {
Ok(()) => {}
Err(err) if err.kind() == std::io::ErrorKind::NotFound => {}
Err(err) => {
tracing::warn!(path = %recovery_file.display(), %err, "failed to clear daemon recovery state before legacy launch");
}
}
}
if let Some((key, value)) = self.command_env() {
command.env(key, value);
}
#[cfg(unix)]
{
unsafe {
command.pre_exec(|| {
if libc::setsid() == -1 {
return Err(std::io::Error::last_os_error());
}
Ok(())
});
}
}
#[cfg(windows)]
{
use windows_sys::Win32::System::Threading::CREATE_BREAKAWAY_FROM_JOB;
use windows_sys::Win32::System::Threading::DETACHED_PROCESS;
// Preserve process-scoped paths before changing cwd; CA names match CUSTOM_CA_ENV_KEYS.
for name in [
"CODEX_HOME",
"CODEX_SQLITE_HOME",
"CODEX_CA_CERTIFICATE",
"SSL_CERT_FILE",
"REQUESTS_CA_BUNDLE",
"CURL_CA_BUNDLE",
"NODE_EXTRA_CA_CERTS",
"GIT_SSL_CAINFO",
"CARGO_HTTP_CAINFO",
"PIP_CERT",
"BUNDLE_SSL_CA_CERT",
"npm_config_cafile",
"AWS_CONFIG_FILE",
"AWS_SHARED_CREDENTIALS_FILE",
"AWS_WEB_IDENTITY_TOKEN_FILE",
"AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE",
] {
let Some(mut value) = std::env::var_os(name) else {
continue;
};
if matches!(name, "CODEX_SQLITE_HOME" | "npm_config_cafile") {
value = value.to_str().unwrap_or_default().trim().into();
}
// These consumers expand `~` independently of the working directory.
let expands_home = if name == "npm_config_cafile" {
value
.to_str()
.is_some_and(|path| path.starts_with("~/") || path.starts_with("~\\"))
} else {
matches!(
name,
"CODEX_SQLITE_HOME" | "AWS_CONFIG_FILE" | "AWS_SHARED_CREDENTIALS_FILE"
) && std::path::Path::new(&value).starts_with("~")
};
if value.is_empty() || expands_home {
continue;
}
command.env(name, std::path::absolute(value)?);
}
if let Some(value) = std::env::var_os("SSL_CERT_DIR") {
let paths = std::env::split_paths(&value)
.filter(|path| !path.as_os_str().is_empty())
.map(std::path::absolute)
.collect::<std::io::Result<Vec<_>>>()?;
command.env("SSL_CERT_DIR", std::env::join_paths(paths)?);
}
// A Windows process pins its working directory for its lifetime.
// Keep both managed children out of the launching project's directory.
command.current_dir(
self.pid_file
.parent()
.context("daemon pid path has no parent")?,
);
// Never retry inside the parent's Job Object: that would report a
// successful launch that dies when the terminal/SSH session closes.
command.creation_flags(DETACHED_PROCESS | CREATE_BREAKAWAY_FROM_JOB);
if matches!(self.command_kind, PidCommandKind::UpdateLoop { .. }) {
match fs::remove_file(self.pid_file.with_extension("ready")).await {
Ok(()) => {}
Err(err) if err.kind() == std::io::ErrorKind::NotFound => {}
Err(err) => return Err(err).context("failed to clear updater readiness"),
}
}
match self.command_kind {
PidCommandKind::AppServer { .. } => {
command.env(codex_app_server_transport::DAEMON_SHUTDOWN_SOCKET_ENV, "1");
}
PidCommandKind::UpdateLoop { .. } => {
let shutdown_file = self.pid_file.with_extension("shutdown");
match fs::remove_file(&shutdown_file).await {
Ok(()) => {}
Err(err) if err.kind() == std::io::ErrorKind::NotFound => {}
Err(err) => {
return Err(err).context("failed to clear updater shutdown request");
}
}
command.env(
codex_app_server_transport::DAEMON_SHUTDOWN_FILE_ENV,
shutdown_file,
);
}
}
}
let child = match command.spawn() {
Ok(child) => child,
Err(err) => {
if replacement.is_none() {
let _ = fs::remove_file(&self.pid_file).await;
}
return Err(err).with_context(|| {
let job_hint = if cfg!(windows) {
" (the Windows host job must allow breakaway)"
} else {
""
};
format!(
"failed to spawn detached app-server process using {}{job_hint}",
self.codex_bin.display()
)
});
}
};
let pid = child
.id()
.context("spawned app-server process has no pid")?;
let record = match async {
#[cfg(windows)]
super::super::windows::Process::open(pid)?
.context("daemon exited during launch")?
.ensure_detached()?;
let process_start_time = read_process_start_time(pid).await?;
#[cfg(any(target_os = "linux", target_os = "macos"))]
let process_identity = super::identity::read_process_details(pid)
.await
.ok()
.map(|(_, identity)| identity);
#[cfg(not(any(target_os = "linux", target_os = "macos")))]
let process_identity = None;
anyhow::Ok(PidRecord {
pid,
process_start_time,
process_identity,
executable_identity: launched_identity,
})
}
.await
{
Ok(record) => record,
Err(err) => {
let _ = self.terminate_process(pid);
let mut context =
format!("failed to record pid-managed app-server process {pid} startup");
super::super::append_stderr_log_tail_context(&self.pid_file, &mut context).await;
if replacement.is_none() {
let _ = fs::remove_file(&self.pid_file).await;
}
return Err(err).context(context);
}
};
let contents = serde_json::to_vec(&record).context("failed to serialize pid record")?;
let temp_pid_file = self.pid_file.with_extension("pid.tmp");
if let Err(err) = fs::write(&temp_pid_file, &contents).await {
let _ = self.terminate_process(pid);
if replacement.is_none() {
let _ = fs::remove_file(&self.pid_file).await;
}
return Err(err).with_context(|| {
format!("failed to write pid temp file {}", temp_pid_file.display())
});
}
if let Err(err) = fs::rename(&temp_pid_file, &self.pid_file).await {
let _ = self.terminate_process(pid);
let _ = fs::remove_file(&temp_pid_file).await;
if replacement.is_none() {
let _ = fs::remove_file(&self.pid_file).await;
}
return Err(err).with_context(|| {
format!("failed to publish pid file {}", self.pid_file.display())
});
}
#[cfg(windows)]
if matches!(self.command_kind, PidCommandKind::UpdateLoop { .. }) {
self.finish_updater_start(&record, replacement.as_ref())
.await?;
}
drop(reservation_lock);
Ok(Some(pid))
}
}
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