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

libc/runtime/runtime.h

@@ -36,10 +36,9 @@ void _exit(int) libcesque wontreturn;
 void _Exit(int) libcesque wontreturn;
 void quick_exit(int) wontreturn;
 void abort(void) wontreturn;
-int __cxa_atexit(void *, void *, void *) libcesque;
-int atfork(void *, void *) libcesque;
-int atexit(void (*)(void)) libcesque;
-char *getenv(const char *) nosideeffect libcesque;
+int __cxa_atexit(void *, void *, void *) paramsnonnull((1)) libcesque;
+int atexit(void (*)(void)) paramsnonnull() libcesque;
+char *getenv(const char *) paramsnonnull() __wur nosideeffect libcesque;
 int putenv(char *);
 int setenv(const char *, const char *, int);
 int unsetenv(const char *);
@@ -65,6 +64,7 @@ int acct(const char *);
 
 #if defined(_GNU_SOURCE) || defined(_COSMO_SOURCE)
 extern char **environ;
+char *secure_getenv(const char *) paramsnonnull() __wur nosideeffect libcesque;
 #endif
 
 #ifdef _COSMO_SOURCE
@@ -91,7 +91,6 @@ void _longsort(long *, size_t);
 /* diagnostics */
 void ShowCrashReports(void);
 void __printargs(const char *);
-int _getcpucount(void) pureconst;
 int ftrace_install(void);
 int ftrace_enabled(int);
 int strace_enabled(int);