int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
#if 0 /// UNNEEDED by elogind
int extract_first_word_and_warn(const char **p, char **ret, const char *separators, ExtractFlags flags, const char *unit, const char *filename, unsigned line, const char *rvalue);
int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
#if 0 /// UNNEEDED by elogind
int extract_first_word_and_warn(const char **p, char **ret, const char *separators, ExtractFlags flags, const char *unit, const char *filename, unsigned line, const char *rvalue);