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fix: COD-31 harden tmux launch cwd

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This commit is contained in:
Aamer Akhter
2026-06-08 11:18:14 -04:00
parent 6ea73a9251
commit 187ce653ae
2 changed files with 133 additions and 10 deletions
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src/tmux-manager.ts
+24 -10
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@@ -73,6 +73,9 @@ const GRACEFUL_SHUTDOWN_WAIT_MS = 100;
/** Default stats collection interval (2 seconds) */
const DEFAULT_STATS_INTERVAL_MS = 2000;
/** Stable cwd for tmux server/pane launch; actual session cwd is reached inside the pane. */
const TMUX_LAUNCH_CWD = '/tmp';
/** Claude Code native macOS recommendation for avoiding low nofile startup failures. */
export const CLAUDE_CODE_NOFILE_LIMIT = 2147483646;
@@ -679,8 +682,10 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
// (Production uses systemd which has a clean env, but dev/test may be nested.)
const cleanEnv = { ...process.env };
delete cleanEnv.TMUX;
execSync(`${this.tmux()} new-session -ds "${muxName}" -c "${workingDir}"`, {
cwd: workingDir,
// Start the tmux server from a stable local cwd so FUSE/rclone workspace
// blips do not poison tmux's long-lived getcwd state.
execSync(`${this.tmux()} new-session -ds "${muxName}" -c ${TMUX_LAUNCH_CWD}`, {
cwd: TMUX_LAUNCH_CWD,
timeout: EXEC_TIMEOUT_MS,
stdio: 'ignore',
env: cleanEnv,
@@ -706,11 +711,16 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
// so secret values stay off the bash command line. Must run before respawn-pane.
this.applyEnvOverrides(muxName, envOverrides);
// Replace the shell with the actual command (no echo in terminal)
execSync(`${this.tmux()} respawn-pane -k -t "${muxName}" bash -c ${JSON.stringify(fullCmd)}`, {
timeout: EXEC_TIMEOUT_MS,
stdio: 'ignore',
});
// Replace the shell with the actual command (no echo in terminal). Keep
// pane launch in /tmp, then cd inside bash against the current mount table.
const launchCmd = `cd ${JSON.stringify(workingDir)} && ${fullCmd}`;
execSync(
`${this.tmux()} respawn-pane -k -c ${TMUX_LAUNCH_CWD} -t "${muxName}" bash -c ${JSON.stringify(launchCmd)}`,
{
timeout: EXEC_TIMEOUT_MS,
stdio: 'ignore',
}
);
// Wait for tmux session to be queryable
await new Promise((resolve) => setTimeout(resolve, TMUX_CREATION_WAIT_MS));
@@ -890,9 +900,13 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
// Re-apply user env overrides before respawn so the new shell inherits them.
this.applyEnvOverrides(muxName, envOverrides);
await execAsync(`${this.tmux()} respawn-pane -k -t "${muxName}" bash -c ${JSON.stringify(fullCmd)}`, {
timeout: EXEC_TIMEOUT_MS,
});
const launchCmd = `cd ${JSON.stringify(workingDir)} && ${fullCmd}`;
await execAsync(
`${this.tmux()} respawn-pane -k -c ${TMUX_LAUNCH_CWD} -t "${muxName}" bash -c ${JSON.stringify(launchCmd)}`,
{
timeout: EXEC_TIMEOUT_MS,
}
);
// Wait for the respawned process to start
await new Promise((resolve) => setTimeout(resolve, TMUX_CREATION_WAIT_MS));
const pid = this.getPanePid(muxName);