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

tool/decode/lib/asmcodegen.c

@@ -35,7 +35,7 @@ char *format(char *buf, const char *fmt, ...) {
   return buf;
 }
 
-dontdiscard char *tabpad(const char *s, unsigned width) {
+char *tabpad(const char *s, unsigned width) {
   char *p;
   size_t i, l, need;
   l = strlen(s);

tool/decode/lib/asmcodegen.h

@@ -1,5 +1,6 @@
 #ifndef COSMOPOLITAN_TOOL_DECODE_LIB_ASMCODEGEN_H_
 #define COSMOPOLITAN_TOOL_DECODE_LIB_ASMCODEGEN_H_
+#include "libc/stdio/stdio.h"
 #include "tool/decode/lib/idname.h"
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
@@ -19,7 +20,7 @@ extern char b1[BUFSIZ];
 extern char b2[BUFSIZ];
 
 char *format(char *buf, const char *fmt, ...);
-char *tabpad(const char *s, unsigned width) dontdiscard;
+char *tabpad(const char *s, unsigned width) __wur;
 void show(const char *directive, const char *value, const char *comment);
 
 COSMOPOLITAN_C_END_

tool/decode/lib/bitabuilder.c

@@ -19,6 +19,7 @@
 #include "tool/decode/lib/bitabuilder.h"
 #include "libc/assert.h"
 #include "libc/intrin/bits.h"
+#include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"

tool/decode/lib/flagger.c

@@ -29,7 +29,7 @@
  * @param id is the flags
  * @return NUL-terminated string that needs free()
  */
-dontdiscard char *RecreateFlags(const struct IdName *names, unsigned long id) {
+char *RecreateFlags(const struct IdName *names, unsigned long id) {
   bool first;
   size_t bufi, bufn;
   char *bufp, extrabuf[20];

tool/decode/lib/flagger.h

@@ -4,7 +4,7 @@
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
-char *RecreateFlags(const struct IdName *, unsigned long) dontdiscard;
+char *RecreateFlags(const struct IdName *, unsigned long) __wur;
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */