udev: support ENV{}=="" global property matches

[elogind.git] / src / shared / util.h

diff --git a/src/shared/util.h b/src/shared/util.h
index 3401280d0952a4481e8a7e0ff37ffa68a92c9a26..04f2d8a5647bcd54dbdd53e57ecae382aa8d28a4 100644 (file)
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -205,7 +205,7 @@ int safe_atod(const char *s, double *ret_d);
 
 int safe_atou8(const char *s, uint8_t *ret);
 
-#if __WORDSIZE == 32
+#if LONG_MAX == INT_MAX
 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
         assert_cc(sizeof(unsigned long) == sizeof(unsigned));
         return safe_atou(s, (unsigned*) ret_u);
@@ -270,6 +270,7 @@ char **replace_env_argv(char **argv, char **env);
 
 int readlinkat_malloc(int fd, const char *p, char **ret);
 int readlink_malloc(const char *p, char **r);
+int readlink_value(const char *p, char **ret);
 int readlink_and_make_absolute(const char *p, char **r);
 int readlink_and_canonicalize(const char *p, char **r);
 
@@ -321,6 +322,7 @@ int make_console_stdio(void);
 
 int dev_urandom(void *p, size_t n);
 void random_bytes(void *p, size_t n);
+void initialize_srand(void);
 
 static inline uint64_t random_u64(void) {
         uint64_t u;
@@ -581,10 +583,6 @@ static inline bool _pure_ in_charset(const char *s, const char* charset) {
 
 int block_get_whole_disk(dev_t d, dev_t *ret);
 
-int file_is_priv_sticky(const char *p);
-
-int strdup_or_null(const char *a, char **b);
-
 #define NULSTR_FOREACH(i, l)                                    \
         for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
 
@@ -795,6 +793,15 @@ static inline void _reset_errno_(int *saved_errno) {
 
 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
 
+static inline int negative_errno(void) {
+        /* This helper should be used to shut up gcc if you know 'errno' is
+         * negative. Instead of "return -errno;", use "return negative_errno();"
+         * It will suppress bogus gcc warnings in case it assumes 'errno' might
+         * be 0 and thus the caller's error-handling might not be triggered. */
+        assert_return(errno > 0, -EINVAL);
+        return -errno;
+}
+
 struct _umask_struct_ {
         mode_t mask;
         bool quit;
@@ -831,6 +838,21 @@ static inline int log2i(int x) {
         return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
 }
 
+static inline unsigned log2u(unsigned x) {
+        assert(x > 0);
+
+        return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
+}
+
+static inline unsigned log2u_round_up(unsigned x) {
+        assert(x > 0);
+
+        if (x == 1)
+                return 0;
+
+        return log2u(x - 1) + 1;
+}
+
 static inline bool logind_running(void) {
         return access("/run/systemd/seats/", F_OK) >= 0;
 }
@@ -854,6 +876,22 @@ int unlink_noerrno(const char *path);
                 (void *) memset(_new_, 0, _len_);       \
         })
 
+#define alloca_align(size, align)                                       \
+        ({                                                              \
+                void *_ptr_;                                            \
+                size_t _mask_ = (align) - 1;                            \
+                _ptr_ = alloca((size) + _mask_);                        \
+                (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_);         \
+        })
+
+#define alloca0_align(size, align)                                      \
+        ({                                                              \
+                void *_new_;                                            \
+                size_t _size_ = (size);                                 \
+                _new_ = alloca_align(_size_, (align));                  \
+                (void*)memset(_new_, 0, _size_);                        \
+        })
+
 #define strappenda(a, ...)                                       \
         ({                                                       \
                 int _len = strlen(a);                            \
@@ -977,8 +1015,11 @@ bool is_localhost(const char *hostname);
 int take_password_lock(const char *root);
 
 int is_symlink(const char *path);
+int is_dir(const char *path, bool follow);
 
-int unquote_first_word(const char **p, char **ret);
+int unquote_first_word(const char **p, char **ret, bool relax);
 int unquote_many_words(const char **p, ...) _sentinel_;
 
 int free_and_strdup(char **p, const char *s);
+
+int sethostname_idempotent(const char *s);