+
+char *hexmem(const void *p, size_t l);
+void *unhexmem(const char *p, size_t l);
+
+char *strextend(char **x, ...);
+char *strrep(const char *s, unsigned n);
+
+void* greedy_realloc(void **p, size_t *allocated, size_t need);
+#define GREEDY_REALLOC(array, allocated, need) \
+ greedy_realloc((void**) &(array), &(allocated), (sizeof *array) * (need))
+
+static inline void _reset_errno_(int *saved_errno) {
+ errno = *saved_errno;
+}
+
+#define PROTECT_ERRNO __attribute__((cleanup(_reset_errno_))) int _saved_errno_ = errno
+
+struct umask_struct {
+ mode_t mask;
+ bool quit;
+};
+
+static inline void _reset_umask_(struct umask_struct *s) {
+ umask(s->mask);
+};
+
+#define RUN_WITH_UMASK(mask) \
+ for (__attribute__((cleanup(_reset_umask_))) struct umask_struct _saved_umask_ = { umask(mask), false }; \
+ !_saved_umask_.quit ; \
+ _saved_umask_.quit = true)
+
+static inline unsigned u64log2(uint64_t n) {
+ return (n > 1) ? __builtin_clzll(n) ^ 63U : 0;
+}
+
+static inline bool logind_running(void) {
+ return access("/run/systemd/seats/", F_OK) >= 0;
+}
+
+static inline unsigned decimal_str_max(unsigned x) {
+ unsigned ans = 1;
+ while (x /= 10)
+ ans ++;
+ return ans;
+}
+
+int unlink_noerrno(const char *path);