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/str/ksignalnames.S

@@ -19,8 +19,8 @@
 #include "libc/macros.internal.h"
 
 	.macro	.e e s
-	.long	\e - kStrSignal
-	.long	1f - kStrSignal
+	.long	\e - kSignalNames
+	.long	1f - kSignalNames
 	.rodata.str1.1
 1:	.string	"\s"
 	.previous
@@ -29,7 +29,7 @@
 	.section .rodata
 	.align 4
 	.underrun
-kStrSignal:
+kSignalNames:
 	.e	SIGHUP,"HUP"
 	.e	SIGINT,"INT"
 	.e	SIGQUIT,"QUIT"
@@ -65,6 +65,6 @@ kStrSignal:
 	.e	SIGRTMIN,"RTMIN"
 	.e	SIGEMT,"EMT"
 	.e	SIGPWR,"PWR"
-	.long	0
-	.endobj	kStrSignal,globl,hidden
+	.long	-123
+	.endobj	kSignalNames,globl,hidden
 	.overrun

libc/str/qsort.c

@@ -53,7 +53,7 @@ static inline int pntz(size_t p[2]) {
   return 0;
 }
 
-/* smoothsort_shl() and smoothsort_shr() need n > 0 */
+// smoothsort_shl() and smoothsort_shr() need n > 0
 static inline void smoothsort_shl(size_t p[2], int n) {
   if (n >= CHAR_BIT * sizeof(size_t)) {
     n -= CHAR_BIT * sizeof(size_t);
@@ -163,7 +163,7 @@ static void smoothsort(struct SmoothSort *s, void *base, size_t nel,
   if (!size) return;
   head = base;
   high = head + size - width;
-  /* Precompute Leonardo numbers, scaled by element width */
+  // precompute Leonardo numbers, scaled by element width
   for (s->lp[0] = s->lp[1] = width, i = 2;
        (s->lp[i] = s->lp[i - 2] + s->lp[i - 1] + width) < size; i++) {
   }

libc/str/str.h

@@ -192,7 +192,6 @@ wchar_t *wmempcpy(wchar_t *, const wchar_t *, size_t) memcpyesque;
 wchar_t *wmemmove(wchar_t *, const wchar_t *, size_t) memcpyesque;
 void *tinymemccpy(void *, const void *, int, size_t) memcpyesque;
 void *memmem(const void *, size_t, const void *, size_t) libcesque nosideeffect;
-char *strerror(int) returnsnonnull dontthrow nocallback;
 long a64l(const char *);
 char *l64a(long);
 
@@ -262,14 +261,12 @@ wint_t towctrans(wint_t, wctrans_t);
 ╚────────────────────────────────────────────────────────────────────────────│*/
 
 char *strsignal(int) returnsnonnull libcesque;
+char *strerror(int) returnsnonnull dontthrow nocallback;
+const char *strerrno(int) nosideeffect libcesque;
+const char *strerdoc(int) nosideeffect libcesque;
+int strerror_r(int, char *, size_t) dontthrow nocallback;
+int strerror_wr(int, uint32_t, char *, size_t) dontthrow nocallback;
 
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-/* gcc rewrites to memset otherwise :'( */
-void __bzero(void *, size_t) asm("bzero") memcpyesque;
-#define bzero(DEST, SIZE)                                      \
-  ((void)((__builtin_constant_p(SIZE)) ? memset(DEST, 0, SIZE) \
-                                       : __bzero(DEST, SIZE)))
-#endif /* __GNUC__ && !__STRICT_ANSI__ */
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_LIBC_STR_STR_H_ */

libc/str/strsignal.c

@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/bits/bits.h"
-#include "libc/fmt/kerrornames.internal.h"
+#include "libc/fmt/magnumstrs.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/str/str.h"
 
@@ -35,15 +35,12 @@ static char g_strsignal[12];
  * @see sigaction()
  */
 char *strsignal(int sig) {
-  int i;
+  const char *s;
   strcpy(g_strsignal, "SIG");
   if (sig) {
-    for (i = 0; kStrSignal[i].x; ++i) {
-      if (sig == *(const int *)((uintptr_t)kStrSignal + kStrSignal[i].x)) {
-        strcpy(g_strsignal + 3,
-               (const char *)((uintptr_t)kStrSignal + kStrSignal[i].s));
-        return g_strsignal;
-      }
+    if ((s = GetMagnumStr(kSignalNames, sig))) {
+      strcpy(g_strsignal + 3, s);
+      return g_strsignal;
     }
   }
   if (!sig) {