util: define union dirent_storage and make use of it everywhere

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

diff --git a/src/shared/util.h b/src/shared/util.h
index 71b5c52c41de1bf95ac741e1c93884076bbecd00..e5728bd87e275eee904a5d021a105f0211ad8765 100644 (file)
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -35,6 +35,7 @@
 #include <sys/stat.h>
 #include <dirent.h>
 #include <sys/resource.h>
+#include <stddef.h>
 
 #include "macro.h"
 
@@ -46,6 +47,12 @@ typedef struct dual_timestamp {
         usec_t monotonic;
 } dual_timestamp;
 
+union dirent_storage {
+        struct dirent de;
+        uint8_t storage[offsetof(struct dirent, d_name) +
+                        ((NAME_MAX + 1 + sizeof(long)) & ~(sizeof(long) - 1))];
+};
+
 #define MSEC_PER_SEC  1000ULL
 #define USEC_PER_SEC  1000000ULL
 #define USEC_PER_MSEC 1000ULL
@@ -246,6 +253,7 @@ int get_process_comm(pid_t pid, char **name);
 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
 int get_process_exe(pid_t pid, char **name);
 int get_process_uid(pid_t pid, uid_t *uid);
+int get_process_gid(pid_t pid, gid_t *gid);
 
 char hexchar(int x);
 int unhexchar(char c);