Make improvements

- Invent openatemp() API
- Invent O_UNLINK open flag
- Introduce getenv_secure() API
- Remove `git pull` from cosmocc
- Fix utimes() when path is NULL
- Fix mktemp() to never return NULL
- Fix utimensat() UTIME_OMIT on XNU
- Improve utimensat() code for RHEL5
- Turn `argv[0]` C:/ to /C/ on Windows
- Introduce tmpnam() and tmpnam_r() APIs
- Fix more const issues with internal APIs
- Permit utimes() on WIN32 in O_RDONLY mode
- Fix fdopendir() to check fd is a directory
- Fix recent crash regression in landlock make
- Fix futimens(AT_FDCWD, NULL) to return EBADF
- Use workaround so `make -j` doesn't fork bomb
- Rename dontdiscard to __wur (just like glibc)
- Fix st_size for WIN32 symlinks containing UTF-8
- Introduce stdio ext APIs needed by GNU coreutils
- Fix lstat() on WIN32 for symlinks to directories
- Move some constants from normalize.inc to limits.h
- Fix segv with memchr() and memcmp() overlapping page
- Implement POSIX fflush() behavior for reader streams
- Implement AT_SYMLINK_NOFOLLOW for utimensat() on WIN32
- Don't change read-only status of existing files on WIN32
- Correctly handle `0x[^[:xdigit:]]` case in strtol() functions

tool/build/cp.c

@@ -24,6 +24,7 @@
 #include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/fmt/magnumstrs.internal.h"
+#include "libc/limits.h"
 #include "libc/mem/gc.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/ftw.h"

tool/build/gzip.c

@@ -19,6 +19,7 @@
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
 #include "libc/fmt/magnumstrs.internal.h"
+#include "libc/limits.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"

tool/build/lib/demangle.c

@@ -21,6 +21,7 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/iovec.h"
 #include "libc/intrin/safemacros.internal.h"
+#include "libc/limits.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/o.h"
 

tool/build/lib/elfwriter.h

@@ -54,7 +54,7 @@ struct ElfWriter {
   struct Interner *shstrtab;
 };
 
-struct ElfWriter *elfwriter_open(const char *, int) dontdiscard;
+struct ElfWriter *elfwriter_open(const char *, int) __wur;
 void elfwriter_cargoculting(struct ElfWriter *);
 void elfwriter_close(struct ElfWriter *);
 void elfwriter_align(struct ElfWriter *, size_t, size_t);

tool/build/mkdeps.c

@@ -20,6 +20,7 @@
 #include "libc/errno.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/bits.h"
+#include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/alg.h"
 #include "libc/mem/mem.h"

tool/build/mv.c

@@ -23,6 +23,7 @@
 #include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/fmt/magnumstrs.internal.h"
+#include "libc/limits.h"
 #include "libc/mem/gc.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/ftw.h"

tool/build/pledge.c

@@ -39,6 +39,7 @@
 #include "libc/intrin/kprintf.h"
 #include "libc/intrin/promises.internal.h"
 #include "libc/intrin/safemacros.internal.h"
+#include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
 #include "libc/mem/gc.internal.h"

tool/build/pwd.c

@@ -17,6 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
+#include "libc/limits.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"

tool/build/runitd.c

@@ -196,7 +196,7 @@ void GetOpts(int argc, char *argv[]) {
   }
 }
 
-dontdiscard char *DescribeAddress(struct sockaddr_in *addr) {
+__wur char *DescribeAddress(struct sockaddr_in *addr) {
   char ip4buf[16];
   return xasprintf("%s:%hu",
                    inet_ntop(addr->sin_family, &addr->sin_addr.s_addr, ip4buf,

tool/build/sha256sum.c

@@ -21,6 +21,7 @@
 #include "libc/errno.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
+#include "libc/limits.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"

tool/build/unbuffer.c

@@ -24,6 +24,7 @@
 #include "libc/calls/ttydefaults.h"
 #include "libc/errno.h"
 #include "libc/intrin/kprintf.h"
+#include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/log/log.h"
 #include "libc/runtime/runtime.h"

tool/build/unbundle.c

@@ -22,6 +22,7 @@
 #include "libc/errno.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
+#include "libc/limits.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/ftw.h"
 #include "libc/stdio/stdio.h"

tool/build/unveil.c

@@ -19,6 +19,7 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
+#include "libc/limits.h"
 #include "libc/log/bsd.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"

tool/decode/lib/asmcodegen.c

@@ -35,7 +35,7 @@ char *format(char *buf, const char *fmt, ...) {
   return buf;
 }
 
-dontdiscard char *tabpad(const char *s, unsigned width) {
+char *tabpad(const char *s, unsigned width) {
   char *p;
   size_t i, l, need;
   l = strlen(s);

tool/decode/lib/asmcodegen.h

@@ -1,5 +1,6 @@
 #ifndef COSMOPOLITAN_TOOL_DECODE_LIB_ASMCODEGEN_H_
 #define COSMOPOLITAN_TOOL_DECODE_LIB_ASMCODEGEN_H_
+#include "libc/stdio/stdio.h"
 #include "tool/decode/lib/idname.h"
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
@@ -19,7 +20,7 @@ extern char b1[BUFSIZ];
 extern char b2[BUFSIZ];
 
 char *format(char *buf, const char *fmt, ...);
-char *tabpad(const char *s, unsigned width) dontdiscard;
+char *tabpad(const char *s, unsigned width) __wur;
 void show(const char *directive, const char *value, const char *comment);
 
 COSMOPOLITAN_C_END_

tool/decode/lib/bitabuilder.c

@@ -19,6 +19,7 @@
 #include "tool/decode/lib/bitabuilder.h"
 #include "libc/assert.h"
 #include "libc/intrin/bits.h"
+#include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"

tool/decode/lib/flagger.c

@@ -29,7 +29,7 @@
  * @param id is the flags
  * @return NUL-terminated string that needs free()
  */
-dontdiscard char *RecreateFlags(const struct IdName *names, unsigned long id) {
+char *RecreateFlags(const struct IdName *names, unsigned long id) {
   bool first;
   size_t bufi, bufn;
   char *bufp, extrabuf[20];

tool/decode/lib/flagger.h

@@ -4,7 +4,7 @@
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
-char *RecreateFlags(const struct IdName *, unsigned long) dontdiscard;
+char *RecreateFlags(const struct IdName *, unsigned long) __wur;
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */

tool/decode/zip.c

@@ -48,12 +48,12 @@
  * @fileoverview Zip File Disassembler.
  */
 
-dontdiscard char *FormatDosDate(uint16_t dosdate) {
+static __wur char *FormatDosDate(uint16_t dosdate) {
   return xasprintf("%04u-%02u-%02u", ((dosdate >> 9) & 0b1111111) + 1980,
                    (dosdate >> 5) & 0b1111, dosdate & 0b11111);
 }
 
-dontdiscard char *FormatDosTime(uint16_t dostime) {
+static __wur char *FormatDosTime(uint16_t dostime) {
   return xasprintf("%02u:%02u:%02u", (dostime >> 11) & 0b11111,
                    (dostime >> 5) & 0b111111, (dostime << 1) & 0b111110);
 }

tool/emacs/c.lang

@@ -130,7 +130,7 @@ Keywords={
 "warnifused",
 "attributeallocsize",
 "attributeallocalign",
-"dontdiscard",
+"__wur",
 "nointerpose",
 "returnsnonnull",
 "strftimeesque",

tool/emacs/cosmo-c-keywords.el

@@ -84,7 +84,7 @@
            "warnifused"
            "attributeallocsize"
            "attributeallocalign"
-           "dontdiscard"
+           "__wur"
            "nointerpose"
            "returnsnonnull"
            "strftimeesque"

tool/emacs/key.py

@@ -342,7 +342,7 @@ cosmo_kws = frozenset([
   "memcpyesque",
   "nocallback",
   "nodebuginfo",
-  "dontdiscard",
+  "__wur",
   "dontinline",
   "dontinstrument",
   "nointerpose",
@@ -401,7 +401,7 @@ cosmo_kws = frozenset([
   "memcpyesque",
   "nocallback",
   "nodebuginfo",
-  "dontdiscard",
+  "__wur",
   "dontinline",
   "noinstrument",
   "nointerpose",

tool/viz/bf.c

@@ -1,120 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/calls/calls.h"
-#include "libc/calls/struct/stat.h"
-#include "libc/fmt/itoa.h"
-#include "libc/intrin/bits.h"
-#include "libc/intrin/bsr.h"
-#include "libc/macros.internal.h"
-#include "libc/runtime/runtime.h"
-#include "libc/str/str.h"
-#include "libc/str/tab.internal.h"
-#include "libc/sysv/consts/o.h"
-#include "libc/sysv/consts/s.h"
-
-/**
- * @fileoverview BingFold - A Hexdump Tool
- */
-
-#define W 64
-#define C 253
-
-static unsigned long roundup2pow(unsigned long x) {
-  return x > 1 ? 2ul << _bsrl(x - 1) : x ? 1 : 0;
-}
-
-void bf(int fd) {
-  ssize_t rc;
-  uint64_t w;
-  struct stat st;
-  size_t i, n, o;
-  int c, fg, fg2, bits;
-  char ibuf[W], obuf[12 + 1 + W * 6 + 1 + W * (2 + 11) + 11 + 1];
-  o = 0;
-  if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode) && st.st_size) {
-    bits = _bsr(roundup2pow(st.st_size));
-    bits = ROUNDUP(bits, 4);
-  } else {
-    bits = 48;
-  }
-  do {
-    if ((rc = read(fd, ibuf, W)) == -1) exit(2);
-    if (rc) {
-      n = 0;
-      n += uint64toarray_fixed16(o, obuf + n, bits);
-      o += rc;
-      obuf[n++] = ' ';
-      for (i = 0; i < rc; ++i) {
-        c = ibuf[i] & 0xff;
-        w = tpenc(kCp437[c]);
-        do {
-          obuf[n++] = w;
-        } while ((w >>= 8));
-      }
-      for (i = 0; i < W - rc + 1; ++i) {
-        obuf[n++] = ' ';
-      }
-      for (fg = -1, i = 0; i < rc; ++i) {
-        c = ibuf[i] & 0xff;
-        if (c < 32) {
-          fg2 = 237 + c * ((C - 237) / 32.);
-        } else if (c >= 232) {
-          fg2 = C + (c - 232) * ((255 - C) / (256. - 232));
-        } else {
-          fg2 = C;
-        }
-        if (fg2 != fg) {
-          fg = fg2;
-          obuf[n++] = 033;
-          obuf[n++] = '[';
-          obuf[n++] = '3';
-          obuf[n++] = '8';
-          obuf[n++] = ';';
-          obuf[n++] = '5';
-          obuf[n++] = ';';
-          n = FormatInt64(obuf + n, fg) - (obuf + n);
-          obuf[n++] = 'm';
-        }
-        obuf[n++] = "0123456789abcdef"[c >> 4];
-        obuf[n++] = "0123456789abcdef"[c & 15];
-        /* obuf[n++] = ' '; */
-      }
-      obuf[n++] = 033;
-      obuf[n++] = '[';
-      obuf[n++] = '0';
-      obuf[n++] = 'm';
-      obuf[n++] = '\n';
-      write(1, obuf, n);
-    }
-  } while (rc == W);
-}
-
-int main(int argc, char *argv[]) {
-  int i, fd;
-  if (argc > 1) {
-    for (i = 1; i < argc; ++i) {
-      if (i > 1) write(1, "\n", 1);
-      if ((fd = open(argv[i], O_RDONLY)) == -1) exit(1);
-      bf(fd);
-    }
-  } else {
-    bf(0);
-  }
-  return 0;
-}

tool/viz/comma.c

@@ -1,106 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/errno.h"
-#include "libc/fmt/fmt.h"
-#include "libc/log/check.h"
-#include "libc/mem/mem.h"
-#include "libc/runtime/runtime.h"
-#include "libc/stdio/stdio.h"
-#include "libc/str/str.h"
-#include "libc/sysv/consts/ex.h"
-#include "libc/sysv/consts/exit.h"
-#include "third_party/getopt/getopt.internal.h"
-
-#define USAGE \
-  " [FLAGS] [PATH|FLEXDEC...] [<<<FLEXDEC...\\n...]\n\
-Turns numbers into decimal with commas.\n\
-\n\
-Values are tokenized by spaces. Anything that isn't an integer is\n\
-passed through. We parse integers the same way the C compiler does\n\
-so 0x,0b,0,etc. prefixes are fine. Unicode spacing characters are\n\
-supported.\n\
-\n\
-Flags:\n\
-  -o PATH    output path\n\
-  -F STR\n\
-  -T STR     sets field tokenization charset [default is whitespace]\n\
-  -w FLEXDEC\n\
-  -n FLEXDEC set fixed number of columns [default is variable, based\n\
-             on line breaks]\n\
-  -?\n\
-  -h         shows this information\n\
-\n"
-
-static size_t linecap_;
-static FILE *in_, *out_;
-static const char16_t *fieldtoks_;
-static char *inpath_, *outpath_, *line_;
-
-void PrintUsage(int rc, FILE *f) {
-  fputs("Usage: ", f);
-  fputs(program_invocation_name, f);
-  fputs(USAGE, f);
-  exit(rc);
-}
-
-void GetOpts(int *argc, char *argv[]) {
-  int opt;
-  outpath_ = "-";
-  fieldtoks_ = u" \t\v\n\r\f             　";
-  while ((opt = getopt(*argc, argv, "?ho:F:T:w:n:")) != -1) {
-    switch (opt) {
-      case 'o':
-        outpath_ = optarg;
-        break;
-      case 'F':
-      case 'T':
-        break;
-      case '?':
-      case 'h':
-        PrintUsage(EXIT_SUCCESS, stdout);
-      default:
-        PrintUsage(EX_USAGE, stderr);
-    }
-  }
-  if (optind == *argc) {
-    argv[(*argc)++] = "-";
-  }
-}
-
-void ProcessFile(void) {
-  while ((getline(&line_, &linecap_, in_)) != -1) {
-    // TODO(jart)
-  }
-}
-
-int main(int argc, char *argv[]) {
-  size_t i;
-  GetOpts(&argc, argv);
-  CHECK_NOTNULL((out_ = fopen(outpath_, "w")));
-  for (i = optind; i < argc; ++i) {
-    CHECK_NOTNULL((in_ = fopen((inpath_ = argv[i]), "r")));
-    ProcessFile();
-    CHECK_NE(-1, fclose(in_));
-    in_ = 0;
-  }
-  CHECK_NE(-1, fclose(out_));
-  out_ = 0;
-  free(line_);
-  return 0;
-}

tool/viz/double2int.c

@@ -1,42 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/conv.h"
-#include "libc/limits.h"
-#include "libc/macros.internal.h"
-#include "libc/mem/gc.internal.h"
-#include "libc/stdio/stdio.h"
-#include "libc/str/str.h"
-#include "libc/x/x.h"
-#include "third_party/gdtoa/gdtoa.h"
-
-void double2int(const char *s) {
-  double b64;
-  uint64_t u64;
-  b64 = strtod(s, NULL);
-  memcpy(&u64, &b64, 8);
-  printf("0x%016lx\n", u64);
-}
-
-int main(int argc, char *argv[]) {
-  int i;
-  for (i = 1; i < argc; ++i) {
-    double2int(argv[i]);
-  }
-  return 0;
-}

tool/viz/echoctl.c

@@ -1,28 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/calls/struct/termios.h"
-#include "libc/calls/termios.h"
-#include "libc/sysv/consts/termios.h"
-
-int main(int argc, char *argv[]) {
-  struct termios t;
-  if (tcgetattr(0, &t) == -1) return 1;
-  t.c_lflag ^= ECHOCTL;
-  if (tcsetattr(0, TCSANOW, &t) == -1) return 2;
-}

tool/viz/fontspace.c

@@ -42,7 +42,7 @@ int end = 0x03134A /* 0x10FFFD */;
 int verbose;
 
 struct winsize ws = {24, 80};
-signed char kThePerfectKernel[8] = {-1, -3, 3, 17, 17, 3, -3, -1};
+signed char kThePerfectKernel[8] = {-1, -1, 3, 15, 15, 3, -1, -1};
 
 void PrintBar(unsigned char *p, size_t n) {
   size_t i, j;

tool/viz/life.c

@@ -29,6 +29,7 @@
 #include "libc/intrin/popcnt.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/intrin/xchg.internal.h"
+#include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"

tool/viz/memzoom.c

@@ -34,6 +34,7 @@
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/hilbert.h"
 #include "libc/intrin/safemacros.internal.h"
+#include "libc/limits.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"