Make improvements

- Expand redbean UNIX module
- Expand redbean documentation
- Ensure Lua copyright is embedded in binary
- Increase the PATH_MAX limit especially on NT
- Use column major sorting for linenoise completions
- Fix some suboptimalities in redbean's new UNIX API
- Figured out right flags for Multics newline in raw mode

libc/calls/getrusage-nt.c

@@ -18,11 +18,14 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/calls/internal.h"
+#include "libc/calls/sig.internal.h"
 #include "libc/calls/struct/rusage.h"
 #include "libc/fmt/conv.h"
+#include "libc/intrin/spinlock.h"
 #include "libc/nt/accounting.h"
 #include "libc/nt/process.h"
 #include "libc/nt/runtime.h"
+#include "libc/nt/struct/iocounters.h"
 #include "libc/nt/struct/processmemorycounters.h"
 #include "libc/nt/thread.h"
 #include "libc/str/str.h"
@@ -30,22 +33,32 @@
 #include "libc/sysv/errfuns.h"
 
 textwindows int sys_getrusage_nt(int who, struct rusage *usage) {
+  int64_t me, nsignals;
+  struct NtIoCounters iocount;
   struct NtProcessMemoryCountersEx memcount;
   struct NtFileTime ftExit, ftUser, ftKernel, ftCreation;
   if (!usage) return efault();
   if (who == 99) return enosys();  // @see libc/sysv/consts.sh
   if (!usage) return 0;
+  me = GetCurrentProcess();
   if (!(who == RUSAGE_SELF ? GetProcessTimes : GetThreadTimes)(
           (who == RUSAGE_SELF ? GetCurrentProcess : GetCurrentThread)(),
           &ftCreation, &ftExit, &ftKernel, &ftUser) ||
-      !GetProcessMemoryInfo(GetCurrentProcess(), &memcount, sizeof(memcount))) {
+      !GetProcessMemoryInfo(me, &memcount, sizeof(memcount)) ||
+      !GetProcessIoCounters(me, &iocount)) {
     return __winerr();
   }
+  _spinlock(&__sig_lock);
+  nsignals = __sig_count;
+  _spunlock(&__sig_lock);
   *usage = (struct rusage){
       .ru_utime = WindowsDurationToTimeVal(ReadFileTime(ftUser)),
       .ru_stime = WindowsDurationToTimeVal(ReadFileTime(ftKernel)),
       .ru_maxrss = memcount.PeakWorkingSetSize / 1024,
       .ru_majflt = memcount.PageFaultCount,
+      .ru_inblock = iocount.ReadOperationCount,
+      .ru_oublock = iocount.WriteOperationCount,
+      .ru_nsignals = __sig_count,
   };
   return 0;
 }