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/calls/utimes.c

@@ -22,6 +22,7 @@
 #include "libc/calls/struct/timeval.internal.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/sysv/consts/at.h"
+#include "libc/sysv/errfuns.h"
 
 /**
  * Changes last accessed/modified timestamps on file.
@@ -36,7 +37,9 @@
 int utimes(const char *path, const struct timeval tv[2]) {
   int rc;
   struct timespec ts[2];
-  if (tv) {
+  if (!path) {
+    rc = efault();
+  } else if (tv) {
     ts[0] = timeval_totimespec(tv[0]);
     ts[1] = timeval_totimespec(tv[1]);
     rc = __utimens(AT_FDCWD, path, ts, 0);