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/integral/normalize.inc

@@ -79,15 +79,7 @@
 #define _PAGESIZE 4096
 #endif
 
-#define BUFSIZ     0x1000 /* best stdio default */
-#define CHAR_BIT   8      /* b/c von neumann */
-#define ARG_MAX    0xfffe /* for argv and envp; see CreateProcess (32767*2) */
-#define PATH_MAX   1024   /* b/c _XOPEN_PATH_MAX */
-#define NAME_MAX   255    /* 511 on netbsd */
-#define CHILD_MAX  16     /* only if malloc isn't linked */
-#define OPEN_MAX   16     /* only if malloc isn't linked */
-#define ATEXIT_MAX 32     /* only if malloc isn't linked */
-#define NSIG       128    /* b/c freebsd */
+#define NSIG 128 /* b/c freebsd */
 
 #if defined(__LP64__) && !defined(__INT64_TYPE__)
 #include "libc/integral/lp64.inc"