log: fix log_full_errno() with custom facilities

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

diff --git a/src/shared/log.h b/src/shared/log.h
index 794af7be6af64aa004424d01131e558d418546bc..d15d7c8f92b848c63e80ddea4987da2ce941d98d 100644 (file)
--- a/src/shared/log.h
+++ b/src/shared/log.h
@@ -25,6 +25,8 @@
 #include <stdarg.h>
 #include <syslog.h>
 #include <sys/signalfd.h>
+#include <sys/types.h>
+#include <unistd.h>
 #include <errno.h>
 
 #include "macro.h"
@@ -73,46 +75,51 @@ void log_close_console(void);
 
 void log_parse_environment(void);
 
-int log_meta(
+int log_internal(
                 int level,
-                const char*file,
+                int error,
+                const char *file,
                 int line,
                 const char *func,
-                const char *format, ...) _printf_(5,6);
+                const char *format, ...) _printf_(6,7);
 
-int log_metav(
+int log_internalv(
                 int level,
-                const char*file,
+                int error,
+                const char *file,
                 int line,
                 const char *func,
                 const char *format,
-                va_list ap) _printf_(5,0);
+                va_list ap) _printf_(6,0);
 
-int log_meta_object(
+int log_object_internal(
                 int level,
-                const char*file,
+                int error,
+                const char *file,
                 int line,
                 const char *func,
-                const char *object_name,
+                const char *object_field,
                 const char *object,
-                const char *format, ...) _printf_(7,8);
+                const char *format, ...) _printf_(8,9);
 
-int log_metav_object(
+int log_object_internalv(
                 int level,
+                int error,
                 const char*file,
                 int line,
                 const char *func,
-                const char *object_name,
+                const char *object_field,
                 const char *object,
                 const char *format,
-                va_list ap) _printf_(7,0);
+                va_list ap) _printf_(8,0);
 
 int log_struct_internal(
                 int level,
+                int error,
                 const char *file,
                 int line,
                 const char *func,
-                const char *format, ...) _printf_(5,0) _sentinel_;
+                const char *format, ...) _printf_(6,0) _sentinel_;
 
 int log_oom_internal(
                 const char *file,
@@ -122,11 +129,13 @@ int log_oom_internal(
 /* This modifies the buffer passed! */
 int log_dump_internal(
                 int level,
-                const char*file,
+                int error,
+                const char *file,
                 int line,
                 const char *func,
                 char *buffer);
 
+/* Logging for various assertions */
 noreturn void log_assert_failed(
                 const char *text,
                 const char *file,
@@ -145,30 +154,58 @@ void log_assert_failed_return(
                 int line,
                 const char *func);
 
-#define log_full(level, ...) \
-do { \
-        if (log_get_max_level() >= (level)) \
-                log_meta((level), __FILE__, __LINE__, __func__, __VA_ARGS__); \
-} while (0)
-
-#define log_debug(...)   log_full(LOG_DEBUG,   __VA_ARGS__)
-#define log_info(...)    log_full(LOG_INFO,    __VA_ARGS__)
-#define log_notice(...)  log_full(LOG_NOTICE,  __VA_ARGS__)
-#define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
-#define log_error(...)   log_full(LOG_ERR,     __VA_ARGS__)
+/* Logging with level */
+#define log_full_errno(level, error, ...)                                         \
+        ({                                                                        \
+                int _l = (level), _e = (error);                                   \
+                (log_get_max_level() >= LOG_PRI(_l))                              \
+                ? log_internal(_l, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
+                : -abs(_e); \
+        })
+
+#define log_full(level, ...) log_full_errno(level, 0, __VA_ARGS__)
+
+/* Normal logging */
+#define log_debug(...)     log_full(LOG_DEBUG,   __VA_ARGS__)
+#define log_info(...)      log_full(LOG_INFO,    __VA_ARGS__)
+#define log_notice(...)    log_full(LOG_NOTICE,  __VA_ARGS__)
+#define log_warning(...)   log_full(LOG_WARNING, __VA_ARGS__)
+#define log_error(...)     log_full(LOG_ERR,     __VA_ARGS__)
+#define log_emergency(...) log_full(getpid() == 1 ? LOG_EMERG : LOG_ERR, __VA_ARGS__)
+
+/* Logging triggered by an errno-like error */
+#define log_debug_errno(error, ...)     log_full_errno(LOG_DEBUG,   error, __VA_ARGS__)
+#define log_info_errno(error, ...)      log_full_errno(LOG_INFO,    error, __VA_ARGS__)
+#define log_notice_errno(error, ...)    log_full_errno(LOG_NOTICE,  error, __VA_ARGS__)
+#define log_warning_errno(error, ...)   log_full_errno(LOG_WARNING, error, __VA_ARGS__)
+#define log_error_errno(error, ...)     log_full_errno(LOG_ERR,     error, __VA_ARGS__)
+#define log_emergency_errno(error, ...) log_full_errno(getpid() == 1 ? LOG_EMERG : LOG_ERR, error, __VA_ARGS__)
+
+#ifdef LOG_TRACE
+#  define log_trace(...) log_debug(__VA_ARGS__)
+#else
+#  define log_trace(...) do {} while(0)
+#endif
+
+/* Structured logging */
+#define log_struct(level, ...) log_struct_internal(level, 0, __FILE__, __LINE__, __func__, __VA_ARGS__)
+#define log_struct_errno(level, error, ...) log_struct_internal(level, error, __FILE__, __LINE__, __func__, __VA_ARGS__)
 
-#define log_struct(level, ...) log_struct_internal(level, __FILE__, __LINE__, __func__, __VA_ARGS__)
+/* This modifies the buffer passed! */
+#define log_dump(level, buffer) log_dump_internal(level, 0, __FILE__, __LINE__, __func__, buffer)
 
 #define log_oom() log_oom_internal(__FILE__, __LINE__, __func__)
 
-/* This modifies the buffer passed! */
-#define log_dump(level, buffer) log_dump_internal(level, __FILE__, __LINE__, __func__, buffer)
-
 bool log_on_console(void) _pure_;
 
 const char *log_target_to_string(LogTarget target) _const_;
 LogTarget log_target_from_string(const char *s) _pure_;
 
-#define MESSAGE_ID(x) "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(x)
+/* Helpers to prepare various fields for structured logging */
+#define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
+#define LOG_MESSAGE_ID(x) "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(x)
+#define LOG_ERRNO(error) "ERRNO=%i", abs(error)
 
 void log_received_signal(int level, const struct signalfd_siginfo *si);
+
+void log_set_upgrade_syslog_to_journal(bool b);