MISC: Improve several things relating to PID lookups (#1594)

findRunningScriptByPid needlessly took a "server" argument. This caused
there to be a "getRunningScriptByPid" version that did *not*, and it was
looping through all servers in order to function, which is needlessly
inefficient.

By removing the parameter and the needless inefficient helper method,
the following changes:
- Many Netscript functions such as isRunning() and getScript() become faster.
- The terminal "tail" command now works by pid regardless of the current
  server. Note that "kill" already worked this way.

I also improved the docs around "tail", since the pid argument wasn't
in the help.

src/Netscript/NetscriptHelpers.tsx

@@ -10,7 +10,7 @@ import type { WorkerScript } from "./WorkerScript";
 
 import React from "react";
 import { killWorkerScript } from "./killWorkerScript";
-import { GetAllServers, GetServer } from "../Server/AllServers";
+import { GetServer } from "../Server/AllServers";
 import { Player } from "@player";
 import { ScriptDeath } from "./ScriptDeath";
 import { formatExp, formatMoney, formatRam, formatThreads } from "../ui/formatNumber";
@@ -649,17 +649,9 @@ export function getRunningScriptsByArgs(
   return findRunningScripts(path, scriptArgs, server);
 }
 
-function getRunningScriptByPid(pid: number): RunningScript | null {
-  for (const server of GetAllServers()) {
-    const runningScript = findRunningScriptByPid(pid, server);
-    if (runningScript) return runningScript;
-  }
-  return null;
-}
-
 function getRunningScript(ctx: NetscriptContext, ident: ScriptIdentifier): RunningScript | null {
   if (typeof ident === "number") {
-    return getRunningScriptByPid(ident);
+    return findRunningScriptByPid(ident);
   } else {
     const scripts = getRunningScriptsByArgs(ctx, ident.scriptname, ident.hostname, ident.args);
     if (scripts === null) return null;

src/Script/ScriptHelpers.ts

@@ -98,12 +98,9 @@ export function findRunningScripts(
   return server.runningScriptMap.get(scriptKey(path, args)) ?? null;
 }
 
-//Returns a RunningScript object matching the pid on the
-//designated server, and false otherwise
-export function findRunningScriptByPid(pid: number, server: BaseServer): RunningScript | null {
+//Returns a RunningScript object with the given pid, or null
+export function findRunningScriptByPid(pid: number): RunningScript | null {
   const ws = workerScripts.get(pid);
-  // Return null if no ws found or if it's on a different server.
   if (!ws) return null;
-  if (ws.scriptRef.server !== server.hostname) return null;
   return ws.scriptRef;
 }

src/Terminal/HelpText.ts

@@ -39,7 +39,7 @@ export const TerminalHelpText: string[] = [
   "    scan-analyze [d] [-a]            Prints info for all servers up to d nodes away",
   "    scp [files...] [server]          Copies a file to a destination server",
   "    sudov                            Shows whether you have root access on this computer",
-  "    tail [script] [args...]          Displays dynamic logs for the specified script",
+  "    tail [script/pid] [args...]      Displays dynamic logs for the specified script",
   "    top                              Displays all running scripts and their RAM usage",
   "    unalias [alias name]             Deletes the specified alias",
   "    vim [files...]                   Text editor - Open up and edit one or more scripts or text files in vim mode",

src/Terminal/commands/tail.ts

@@ -7,7 +7,7 @@ import { hasScriptExtension } from "../../Paths/ScriptFilePath";
 export function tail(commandArray: (string | number | boolean)[], server: BaseServer): void {
   try {
     if (commandArray.length < 1) {
-      Terminal.error("Incorrect number of arguments. Usage: tail [script] [arg1] [arg2]...");
+      Terminal.error("Incorrect number of arguments. Usage: tail [pid] or tail [scriptname] [arg1] [arg2]...");
     } else if (typeof commandArray[0] === "string") {
       const [rawName, ...args] = commandArray;
       const path = Terminal.getFilepath(rawName);
@@ -25,9 +25,9 @@ export function tail(commandArray: (string | number | boolean)[], server: BaseSe
       // arguments, they can't be distinguished except by pid).
       LogBoxEvents.emit(candidates.values().next().value);
     } else if (typeof commandArray[0] === "number") {
-      const runningScript = findRunningScriptByPid(commandArray[0], server);
+      const runningScript = findRunningScriptByPid(commandArray[0]);
       if (runningScript == null) {
-        Terminal.error(`No script with PID ${commandArray[0]} is running on the server`);
+        Terminal.error(`No script with PID ${commandArray[0]} is running`);
         return;
       }
       LogBoxEvents.emit(runningScript);

src/ui/React/LogBoxManager.tsx

@@ -212,7 +212,7 @@ function LogWindow({ hidden, script, onClose }: LogWindowProps): React.ReactElem
   function run(): void {
     const server = GetServer(script.server);
     if (server === null) return;
-    const s = findRunningScriptByPid(script.pid, server);
+    const s = findRunningScriptByPid(script.pid);
     if (s === null) {
       const baseScript = server.scripts.get(script.filename);
       if (!baseScript) {