Make fixes and improvements

- Invent iso8601us() for faster timestamps
- Improve --strace descriptions of sigset_t
- Rebuild the Landlock Make bootstrap binary
- Introduce MODE=sysv for non-Windows builds
- Permit OFD fcntl() locks under pledge(flock)
- redbean can now protect your kernel from ddos
- Have vfork() fallback to sys_fork() not fork()
- Change kmalloc() to not die when out of memory
- Improve documentation for some termios functions
- Rewrite putenv() and friends to conform to POSIX
- Fix linenoise + strace verbosity issue on Windows
- Fix regressions in our ability to show backtraces
- Change redbean SetHeader() to no-op if value is nil
- Improve fcntl() so SQLite locks work in non-WAL mode
- Remove some unnecessary work during fork() on Windows
- Create redbean-based SSL reverse proxy for IPv4 TurfWar
- Fix ape/apeinstall.sh warning when using non-bash shells
- Add ProgramTrustedIp(), and IsTrustedIp() APIs to redbean
- Support $PWD, $UID, $GID, and $EUID in command interpreter
- Introduce experimental JTqFpD APE prefix for non-Windows builds
- Invent blackhole daemon for firewalling IP addresses via UNIX named socket
- Add ProgramTokenBucket(), AcquireToken(), and CountTokens() APIs to redbean

libc/mem/putenv.c

@@ -1,134 +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/intrin/strace.internal.h"
-#include "libc/dce.h"
-#include "libc/macros.internal.h"
-#include "libc/mem/alg.h"
-#include "libc/mem/internal.h"
-#include "libc/mem/mem.h"
-#include "libc/runtime/runtime.h"
-#include "libc/str/str.h"
-#include "libc/sysv/errfuns.h"
-
-#define ToUpper(c) ((c) >= 'a' && (c) <= 'z' ? (c) - 'a' + 'A' : (c))
-
-static bool once;
-static size_t capacity;
-
-static size_t GetEnvironLen(char **env) {
-  char **p = env;
-  while (*p) ++p;
-  return p - env;
-}
-
-static void RestoreOriginalEnvironment(char **envp) {
-  environ = envp;
-}
-
-static void PutEnvImplAtExit(void *p) {
-  free(p);
-}
-
-static void FreeEnviron(char **env) {
-  char **a;
-  for (a = env; *a; ++a) {
-    free(*a);
-  }
-  free(env);
-}
-
-static void GrowEnviron(void) {
-  size_t n, c;
-  char **a, **b, **p;
-  a = environ;
-  n = a ? GetEnvironLen(a) : 0;
-  c = MAX(16ul, n) << 1;
-  b = calloc(c, sizeof(char *));
-  if (a) {
-    for (p = b; *a;) {
-      *p++ = strdup(*a++);
-    }
-  }
-  __cxa_atexit(FreeEnviron, b, 0);
-  environ = b;
-  capacity = c;
-}
-
-int PutEnvImpl(char *s, bool overwrite) {
-  char *p;
-  unsigned i, namelen;
-  if (!once) {
-    __cxa_atexit(RestoreOriginalEnvironment, environ, 0);
-    GrowEnviron();
-    once = true;
-  } else if (!environ) {
-    GrowEnviron();
-  }
-  for (p = s; *p && *p != '='; ++p) {
-    if (IsWindows()) {
-      *p = ToUpper(*p);
-    }
-  }
-  if (*p != '=') goto Fail;
-  namelen = p + 1 - s;
-  for (i = 0; environ[i]; ++i) {
-    if (!strncmp(environ[i], s, namelen)) {
-      if (!overwrite) {
-        free(s);
-        return 0;
-      }
-      goto Replace;
-    }
-  }
-  if (i + 1 >= capacity) {
-    GrowEnviron();
-  }
-  environ[i + 1] = 0;
-Replace:
-  __cxa_atexit(PutEnvImplAtExit, environ[i], 0);
-  environ[i] = s;
-  return 0;
-Fail:
-  free(s);
-  return einval();
-}
-
-static void UnsetenvFree(void *p) {
-  free(p);
-}
-
-/* weakly called by unsetenv() when removing a pointer */
-void __freeenv(void *p) {
-  if (once) {
-    __cxa_atexit(UnsetenvFree, p, 0);
-  }
-}
-
-/**
- * Emplaces environment key=value.
- *
- * @return 0 on success or non-zero on error
- * @see setenv(), getenv()
- */
-int putenv(char *s) {
-  int rc;
-  rc = PutEnvImpl(strdup(s), true);
-  STRACE("putenv(%#s) → %d", s, rc);
-  return rc;
-}