Make improvements

- Add rusage to redbean Lua API
- Add more redbean documentation
- Add pledge() to redbean Lua API
- Polyfill OpenBSD pledge() for Linux
- Increase PATH_MAX limit to 1024 characters
- Untrack sibling processes after fork() on Windows

tool/build/compile.c

@@ -173,7 +173,7 @@ char *shortened;
 char *cachedcmd;
 char *colorflag;
 char *originalcmd;
-char ccpath[PATH_MAX + 1];
+char ccpath[PATH_MAX];
 
 struct stat st;
 struct Strings env;

tool/build/lib/demangle.c

@@ -42,7 +42,7 @@ void CloseCxxFilt(void) {
 void SpawnCxxFilt(void) {
   int pipefds[2][2];
   const char *cxxfilt;
-  char path[PATH_MAX + 1];
+  char path[PATH_MAX];
   cxxfilt = firstnonnull(emptytonull(getenv("CXXFILT")), "c++filt");
   if (commandv(cxxfilt, path, sizeof(path))) {
     pipe2(pipefds[0], O_CLOEXEC);

tool/build/rle.c

@@ -21,6 +21,7 @@
 #include "libc/errno.h"
 #include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
+#include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
@@ -200,7 +201,8 @@ int Run(char **paths, size_t count) {
           rc = RunLengthCode();
         } else {
           suffixlen = strlen(suffix_);
-          if (!IsTrustworthy() && strlen(paths[i]) + suffixlen + 1 > PATH_MAX) {
+          if (!IsTrustworthy() &&
+              strlen(paths[i]) + suffixlen >= ARRAYLEN(pathbuf)) {
             return eoverflow();
           }
           p = stpcpy(pathbuf, paths[i]);

tool/build/runit.c

@@ -116,7 +116,7 @@ uint16_t g_sshport;
 char g_hostname[128];
 uint16_t g_runitdport;
 volatile bool alarmed;
-char g_ssh[PATH_MAX + 1];
+char g_ssh[PATH_MAX];
 
 int __sys_execve(const char *, char *const[], char *const[]) hidden;