X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Futil.h;h=04f2d8a5647bcd54dbdd53e57ecae382aa8d28a4;hb=9a67bcf27554ee0688198e4d4eb5e541861bf7cb;hp=aad9eb7fcbc07f51edc4a95dd4107eea2d310e99;hpb=ef309a681f4c761503e4cd4cc6884d7d6ef70436;p=elogind.git

diff --git a/src/shared/util.h b/src/shared/util.h
index aad9eb7fc..04f2d8a56 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -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);
 
@@ -582,8 +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);
-
 #define NULSTR_FOREACH(i, l)                                    \
         for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
 
@@ -794,6 +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;
@@ -830,6 +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;
 }
@@ -994,7 +1017,7 @@ 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);