util: simplify proc_cmdline() to reuse get_process_cmdline()

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

diff --git a/src/shared/util.h b/src/shared/util.h
index 887cdc4a445413bbfccba6168f1f883ef91c89f3..af589b6708c79d04f7b917538a1c408935be3711 100644 (file)
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -321,6 +321,7 @@ 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;
@@ -793,6 +794,15 @@ 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;
@@ -829,6 +839,21 @@ 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;
 }
@@ -997,3 +1022,5 @@ int unquote_first_word(const char **p, char **ret);
 int unquote_many_words(const char **p, ...) _sentinel_;
 
 int free_and_strdup(char **p, const char *s);
+
+int sethostname_idempotent(const char *s);