diff --git a/src/bin/e_fm_op.c b/src/bin/e_fm_op.c
index dc44cd12a..91a3ac351 100644
--- a/src/bin/e_fm_op.c
+++ b/src/bin/e_fm_op.c
@@ -86,7 +86,7 @@ static int           _e_fm_op_idler_handle_error(int *mark, Eina_List **queue, E
 static Eina_Bool     _e_fm_op_work_idler(void *data);
 static Eina_Bool     _e_fm_op_scan_idler(void *data);
 
-static void          _e_fm_op_send_error(E_Fm_Op_Task *task, E_Fm_Op_Type type, const char *fmt, ...);
+static void          _e_fm_op_send_error(E_Fm_Op_Task *task, E_Fm_Op_Type type, const char *fmt, ...) EINA_PRINTF(3, 4);
 static void          _e_fm_op_rollback(E_Fm_Op_Task *task);
 static void          _e_fm_op_update_progress_report_simple(int percent, const char *src, const char *dst);
 static void          _e_fm_op_update_progress(E_Fm_Op_Task *task, off_t _plus_e_fm_op_done, off_t _plus_e_fm_op_total);
@@ -955,7 +955,7 @@ _e_fm_op_scan_idler(void *data EINA_UNUSED)
  * fmt is a printf format string, the other arguments
  * are for this format string,
  */
-static void
+static void EINA_PRINTF(3, 4)
 _e_fm_op_send_error(E_Fm_Op_Task *task, E_Fm_Op_Type type, const char *fmt, ...)
 {
    va_list ap;
diff --git a/src/bin/e_log.c b/src/bin/e_log.c
index dbde719e3..78f4aadcf 100644
--- a/src/bin/e_log.c
+++ b/src/bin/e_log.c
@@ -10,7 +10,7 @@ static const char *_names[] = {
    "DBG",
 };
 
-static void
+static void  EINA_PRINTF(6, 0)
 _e_log_cb(const Eina_Log_Domain *d, Eina_Log_Level level, const char *file, const char *fnc EINA_UNUSED, int line, const char *fmt, void *data EINA_UNUSED, va_list args)
 {
    const char *color;
diff --git a/src/bin/e_prefix.c b/src/bin/e_prefix.c
index 7820990bc..78331ed12 100644
--- a/src/bin/e_prefix.c
+++ b/src/bin/e_prefix.c
@@ -135,7 +135,7 @@ e_prefix_data_concat(char *dst, size_t size, const char *path)
    return e_prefix_data_concat_len(dst, size, path, strlen(path));
 }
 
-E_API size_t
+E_API size_t EINA_PRINTF(3, 4)
 e_prefix_data_snprintf(char *dst, size_t size, const char *fmt, ...)
 {
    size_t off, ret;
diff --git a/src/bin/e_system.c b/src/bin/e_system.c
index 5e15d8b89..1bb07268a 100644
--- a/src/bin/e_system.c
+++ b/src/bin/e_system.c
@@ -217,7 +217,7 @@ e_system_shutdown(void)
    return 1;
 }
 
-E_API void
+E_API void EINA_PRINTF(2, 3)
 e_system_send(const char *cmd, const char *fmt, ...)
 {
    char *buf = NULL, stack_buf[4096];
diff --git a/src/bin/e_system.h b/src/bin/e_system.h
index a846e9340..498c16ef8 100644
--- a/src/bin/e_system.h
+++ b/src/bin/e_system.h
@@ -7,7 +7,7 @@
 EINTERN int e_system_init(void);
 EINTERN int e_system_shutdown(void);
 
-E_API void e_system_send(const char *cmd, const char *fmt, ...);
+E_API void e_system_send(const char *cmd, const char *fmt, ...) EINA_PRINTF(2, 3);
 E_API void e_system_handler_add(const char *cmd, void (*func) (void *data, const char *params), void *data);
 E_API void e_system_handler_del(const char *cmd, void (*func) (void *data, const char *params), void *data);
 
diff --git a/src/bin/e_user.c b/src/bin/e_user.c
index 703d20c02..1b7e92c70 100644
--- a/src/bin/e_user.c
+++ b/src/bin/e_user.c
@@ -62,7 +62,7 @@ e_user_homedir_concat(char *dst, size_t size, const char *path)
 /**
  * same as snprintf("~/"fmt, ...).
  */
-E_API size_t
+E_API size_t EINA_PRINTF(3, 4)
 e_user_homedir_snprintf(char *dst, size_t size, const char *fmt, ...)
 {
    size_t off, ret;
@@ -195,7 +195,7 @@ e_user_dir_concat(char *dst, size_t size, const char *path)
 /**
  * same as snprintf("~/.e/e/"fmt, ...).
  */
-E_API size_t
+E_API size_t EINA_PRINTF(3, 4)
 e_user_dir_snprintf(char *dst, size_t size, const char *fmt, ...)
 {
    size_t off, ret;
diff --git a/src/bin/system/e_system.h b/src/bin/system/e_system.h
index 39a267adf..dad7fc65a 100644
--- a/src/bin/system/e_system.h
+++ b/src/bin/system/e_system.h
@@ -97,7 +97,7 @@ extern gid_t gid;
 void e_system_inout_init(void);
 void e_system_inout_shutdown(void);
 void e_system_inout_command_register(const char *cmd, void (*func) (void *data, const char *aprams), void *data);
-void e_system_inout_command_send(const char *cmd, const char *fmt, ...);
+void e_system_inout_command_send(const char *cmd, const char *fmt, ...) EINA_PRINTF(2, 3);
 
 void e_system_backlight_init(void);
 void e_system_backlight_shutdown(void);
diff --git a/src/bin/system/e_system_inout.c b/src/bin/system/e_system_inout.c
index 5d1b12a45..01b943b8e 100644
--- a/src/bin/system/e_system_inout.c
+++ b/src/bin/system/e_system_inout.c
@@ -116,7 +116,7 @@ e_system_inout_command_register(const char *cmd, void (*func) (void *data, const
    eina_hash_add(_cmd_handlers, cmd, h);
 }
 
-void
+void EINA_PRINTF(2, 3)
 e_system_inout_command_send(const char *cmd, const char *fmt, ...)
 {
    char *buf = NULL, stack_buf[4096];