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source dump of claude code
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6.4 kB · 184 lines
TypeScript
at main
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// This file contains platform-agnostic implementations of common `ps` type commands.// When adding new code to this file, make sure to handle:// - Win32, as `ps` within cygwin and WSL may not behave as expected, particularly when attempting to access processes on the host.// - Unix vs BSD-style `ps` have different options.
/** * Check if a process with the given PID is running (signal 0 probe). * * PID ≤ 1 returns false (0 is current process group, 1 is init). * * Note: `process.kill(pid, 0)` throws EPERM when the process exists but is * owned by another user. This reports such processes as NOT running, which * is conservative for lock recovery (we won't steal a live lock). */export function isProcessRunning(pid: number): boolean { if (pid <= 1) return false try { process.kill(pid, 0) return true } catch { return false }}
/** * Gets the ancestor process chain for a given process (up to maxDepth levels) * @param pid - The starting process ID * @param maxDepth - Maximum number of ancestors to fetch (default: 10) * @returns Array of ancestor PIDs from immediate parent to furthest ancestor */export async function getAncestorPidsAsync( pid: string | number, maxDepth = 10,): Promise<number[]> { if (process.platform === 'win32') { // For Windows, use a PowerShell script that walks the process tree const script = ` $pid = ${String(pid)} $ancestors = @() for ($i = 0; $i -lt ${maxDepth}; $i++) { $proc = Get-CimInstance Win32_Process -Filter "ProcessId=$pid" -ErrorAction SilentlyContinue if (-not $proc -or -not $proc.ParentProcessId -or $proc.ParentProcessId -eq 0) { break } $pid = $proc.ParentProcessId $ancestors += $pid } $ancestors -join ',' `.trim()
const result = await execFileNoThrowWithCwd( 'powershell.exe', ['-NoProfile', '-Command', script], { timeout: 3000 }, ) if (result.code !== 0 || !result.stdout?.trim()) { return [] } return result.stdout .trim() .split(',') .filter(Boolean) .map(p => parseInt(p, 10)) .filter(p => !isNaN(p)) }
// For Unix, use a shell command that walks up the process tree // This uses a single process invocation instead of multiple sequential calls const script = `pid=${String(pid)}; for i in $(seq 1 ${maxDepth}); do ppid=$(ps -o ppid= -p $pid 2>/dev/null | tr -d ' '); if [ -z "$ppid" ] || [ "$ppid" = "0" ] || [ "$ppid" = "1" ]; then break; fi; echo $ppid; pid=$ppid; done`
const result = await execFileNoThrowWithCwd('sh', ['-c', script], { timeout: 3000, }) if (result.code !== 0 || !result.stdout?.trim()) { return [] } return result.stdout .trim() .split('\n') .filter(Boolean) .map(p => parseInt(p, 10)) .filter(p => !isNaN(p))}
/** * Gets the command line for a given process * @param pid - The process ID to get the command for * @returns The command line string, or null if not found * @deprecated Use getAncestorCommandsAsync instead */export function getProcessCommand(pid: string | number): string | null { try { const pidStr = String(pid) const command = process.platform === 'win32' ? `powershell.exe -NoProfile -Command "(Get-CimInstance Win32_Process -Filter \\"ProcessId=${pidStr}\\").CommandLine"` : `ps -o command= -p ${pidStr}`
const result = execSyncWithDefaults_DEPRECATED(command, { timeout: 1000 }) return result ? result.trim() : null } catch { return null }}
/** * Gets the command lines for a process and its ancestors in a single call * @param pid - The starting process ID * @param maxDepth - Maximum depth to traverse (default: 10) * @returns Array of command strings for the process chain */export async function getAncestorCommandsAsync( pid: string | number, maxDepth = 10,): Promise<string[]> { if (process.platform === 'win32') { // For Windows, use a PowerShell script that walks the process tree and collects commands const script = ` $currentPid = ${String(pid)} $commands = @() for ($i = 0; $i -lt ${maxDepth}; $i++) { $proc = Get-CimInstance Win32_Process -Filter "ProcessId=$currentPid" -ErrorAction SilentlyContinue if (-not $proc) { break } if ($proc.CommandLine) { $commands += $proc.CommandLine } if (-not $proc.ParentProcessId -or $proc.ParentProcessId -eq 0) { break } $currentPid = $proc.ParentProcessId } $commands -join [char]0 `.trim()
const result = await execFileNoThrowWithCwd( 'powershell.exe', ['-NoProfile', '-Command', script], { timeout: 3000 }, ) if (result.code !== 0 || !result.stdout?.trim()) { return [] } return result.stdout.split('\0').filter(Boolean) }
// For Unix, use a shell command that walks up the process tree and collects commands // Using null byte as separator to handle commands with newlines const script = `currentpid=${String(pid)}; for i in $(seq 1 ${maxDepth}); do cmd=$(ps -o command= -p $currentpid 2>/dev/null); if [ -n "$cmd" ]; then printf '%s\\0' "$cmd"; fi; ppid=$(ps -o ppid= -p $currentpid 2>/dev/null | tr -d ' '); if [ -z "$ppid" ] || [ "$ppid" = "0" ] || [ "$ppid" = "1" ]; then break; fi; currentpid=$ppid; done`
const result = await execFileNoThrowWithCwd('sh', ['-c', script], { timeout: 3000, }) if (result.code !== 0 || !result.stdout?.trim()) { return [] } return result.stdout.split('\0').filter(Boolean)}
/** * Gets the child process IDs for a given process * @param pid - The parent process ID * @returns Array of child process IDs as numbers */export function getChildPids(pid: string | number): number[] { try { const pidStr = String(pid) const command = process.platform === 'win32' ? `powershell.exe -NoProfile -Command "(Get-CimInstance Win32_Process -Filter \\"ParentProcessId=${pidStr}\\").ProcessId"` : `pgrep -P ${pidStr}`
const result = execSyncWithDefaults_DEPRECATED(command, { timeout: 1000 }) if (!result) { return [] } return result .trim() .split('\n') .filter(Boolean) .map(p => parseInt(p, 10)) .filter(p => !isNaN(p)) } catch { return [] }}