logger: add option logger.file.fsync (closes #1145)

doc/de/autogen/user/logger_options.adoc

@@ -26,6 +26,12 @@
 ** Werte: 0 .. 3600
 ** Standardwert: `+120+`
 
+* [[option_logger.file.fsync]] *logger.file.fsync*
+** Beschreibung: pass:none[use fsync to synchronize the log file with the storage device after the flush (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of log file]
+** Typ: boolesch
+** Werte: on, off
+** Standardwert: `+off+`
+
 * [[option_logger.file.info_lines]] *logger.file.info_lines*
 ** Beschreibung: pass:none[fügt eine Information in die Protokoll-Datei ein, wenn die Protokollierung gestartet oder beendet wird]
 ** Typ: boolesch

doc/en/autogen/user/logger_options.adoc

@@ -26,6 +26,12 @@
 ** values: 0 .. 3600
 ** default value: `+120+`
 
+* [[option_logger.file.fsync]] *logger.file.fsync*
+** description: pass:none[use fsync to synchronize the log file with the storage device after the flush (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of log file]
+** type: boolean
+** values: on, off
+** default value: `+off+`
+
 * [[option_logger.file.info_lines]] *logger.file.info_lines*
 ** description: pass:none[write information line in log file when log starts or ends for a buffer]
 ** type: boolean

doc/fr/autogen/user/logger_options.adoc

@@ -26,6 +26,12 @@
 ** valeurs: 0 .. 3600
 ** valeur par défaut: `+120+`
 
+* [[option_logger.file.fsync]] *logger.file.fsync*
+** description: pass:none[utiliser fsync pour synchroniser le fichier de log avec le périphérique de stockage après le flush (voir man fsync) ; cela est plus lent mais devrait éviter toute perte de données en cas de panne de courant durant la sauvegarde du fichier de log]
+** type: booléen
+** valeurs: on, off
+** valeur par défaut: `+off+`
+
 * [[option_logger.file.info_lines]] *logger.file.info_lines*
 ** description: pass:none[écrire une ligne d'information dans le fichier log quand le log démarre ou se termine pour un tampon]
 ** type: booléen

doc/it/autogen/user/logger_options.adoc

@@ -26,6 +26,12 @@
 ** valori: 0 .. 3600
 ** valore predefinito: `+120+`
 
+* [[option_logger.file.fsync]] *logger.file.fsync*
+** descrizione: pass:none[use fsync to synchronize the log file with the storage device after the flush (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of log file]
+** tipo: bool
+** valori: on, off
+** valore predefinito: `+off+`
+
 * [[option_logger.file.info_lines]] *logger.file.info_lines*
 ** descrizione: pass:none[scrive una riga informativa nel file di log quando il log inizia o termina per un buffer]
 ** tipo: bool

doc/ja/autogen/user/logger_options.adoc

@@ -26,6 +26,12 @@
 ** 値: 0 .. 3600
 ** デフォルト値: `+120+`
 
+* [[option_logger.file.fsync]] *logger.file.fsync*
+** 説明: pass:none[use fsync to synchronize the log file with the storage device after the flush (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of log file]
+** タイプ: ブール
+** 値: on, off
+** デフォルト値: `+off+`
+
 * [[option_logger.file.info_lines]] *logger.file.info_lines*
 ** 説明: pass:none[バッファのログ保存の開始時と終了時にログファイルへ情報行を書き込む]
 ** タイプ: ブール

doc/pl/autogen/user/logger_options.adoc

@@ -26,6 +26,12 @@
 ** wartości: 0 .. 3600
 ** domyślna wartość: `+120+`
 
+* [[option_logger.file.fsync]] *logger.file.fsync*
+** opis: pass:none[use fsync to synchronize the log file with the storage device after the flush (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of log file]
+** typ: bool
+** wartości: on, off
+** domyślna wartość: `+off+`
+
 * [[option_logger.file.info_lines]] *logger.file.info_lines*
 ** opis: pass:none[zapisuje informacje w pliku z logami o rozpoczęciu i zakończeniu logowania buforu]
 ** typ: bool