int fopen_unlocked(const char *path, const char *options, FILE **ret);
int fdopen_unlocked(int fd, const char *options, FILE **ret);
+FILE* open_memstream_unlocked(char **ptr, size_t *sizeloc);
int write_string_stream_ts(FILE *f, const char *line, WriteStringFileFlags flags, struct timespec *ts);
static inline int write_string_stream(FILE *f, const char *line, WriteStringFileFlags flags) {