basic/log: add concept of "synthethic errnos"

Synthetic errnos are processed like normal, and may be used in %m and become the return value from log_*(), but they are not logged in the journal.
2018-11-22 10:45:08 +01:00
parent 883eb9be98
commit 52d86690d6
3 changed files with 51 additions and 66 deletions
@@ -36,10 +36,11 @@ typedef enum LogTarget{
        _LOG_TARGET_INVALID = -1
 } LogTarget;

-#define LOG_REALM_PLUS_LEVEL(realm, level)      \
-        ((realm) << 10 | (level))
-#define LOG_REALM_REMOVE_LEVEL(realm_level)     \
-        ((realm_level >> 10))
+#define LOG_REALM_PLUS_LEVEL(realm, level)  ((realm) << 10 | (level))
+#define LOG_REALM_REMOVE_LEVEL(realm_level) ((realm_level) >> 10)
+#define SYNTHETIC_ERRNO(num)                (1 << 30 | (num))
+#define IS_SYNTHETIC_ERRNO(val)             ((val) >> 30 & 1)
+#define ERRNO_VALUE(val)                    (abs(val) & 255)

 void log_set_target(LogTarget target);
 void log_set_max_level_realm(LogRealm realm, int level);