core: add option weechat.look.save_config_with_fsync (closes #1083)

This makes the save of all configuration files about 20 to 200x slower
(according to the storage device speed); so this is disabled by default.

6 files changed, 36 insertions, 0 deletions

diff --git a/doc/de/autogen/user/weechat_options.adoc b/doc/de/autogen/user/weechat_options.adoc
index bd8e6dbe5..5e860ca13 100644
--- a/doc/de/autogen/user/weechat_options.adoc
+++ b/doc/de/autogen/user/weechat_options.adoc
@@ -1094,6 +1094,12 @@
 ** Werte: on, off
 ** Standardwert: `+on+`
 
+* [[option_weechat.look.save_config_with_fsync]] *weechat.look.save_config_with_fsync*
+** Beschreibung: pass:none[use fsync to synchronize the configuration file with the storage device (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of configuration file]
+** Typ: boolesch
+** Werte: on, off
+** Standardwert: `+off+`
+
 * [[option_weechat.look.save_layout_on_exit]] *weechat.look.save_layout_on_exit*
 ** Beschreibung: pass:none[beim Beenden wird das aktuelle Layout gesichert (Buffer, Fenster oder beides)]
 ** Typ: integer
diff --git a/doc/en/autogen/user/weechat_options.adoc b/doc/en/autogen/user/weechat_options.adoc
index a87737fc4..1cebe569c 100644
--- a/doc/en/autogen/user/weechat_options.adoc
+++ b/doc/en/autogen/user/weechat_options.adoc
@@ -1094,6 +1094,12 @@
 ** values: on, off
 ** default value: `+on+`
 
+* [[option_weechat.look.save_config_with_fsync]] *weechat.look.save_config_with_fsync*
+** description: pass:none[use fsync to synchronize the configuration file with the storage device (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of configuration file]
+** type: boolean
+** values: on, off
+** default value: `+off+`
+
 * [[option_weechat.look.save_layout_on_exit]] *weechat.look.save_layout_on_exit*
 ** description: pass:none[save layout on exit (buffers, windows, or both)]
 ** type: integer
diff --git a/doc/fr/autogen/user/weechat_options.adoc b/doc/fr/autogen/user/weechat_options.adoc
index 9b6d95d63..faa83c8de 100644
--- a/doc/fr/autogen/user/weechat_options.adoc
+++ b/doc/fr/autogen/user/weechat_options.adoc
@@ -1094,6 +1094,12 @@
 ** valeurs: on, off
 ** valeur par défaut: `+on+`
 
+* [[option_weechat.look.save_config_with_fsync]] *weechat.look.save_config_with_fsync*
+** description: pass:none[utiliser fsync pour synchroniser le fichier de configuration avec le périphérique de stockage (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 configuration]
+** type: booléen
+** valeurs: on, off
+** valeur par défaut: `+off+`
+
 * [[option_weechat.look.save_layout_on_exit]] *weechat.look.save_layout_on_exit*
 ** description: pass:none[sauvegarder la disposition en quittant (tampons, fenêtres, ou les deux)]
 ** type: entier
diff --git a/doc/it/autogen/user/weechat_options.adoc b/doc/it/autogen/user/weechat_options.adoc
index 97ee5ee36..49e30df29 100644
--- a/doc/it/autogen/user/weechat_options.adoc
+++ b/doc/it/autogen/user/weechat_options.adoc
@@ -1094,6 +1094,12 @@
 ** valori: on, off
 ** valore predefinito: `+on+`
 
+* [[option_weechat.look.save_config_with_fsync]] *weechat.look.save_config_with_fsync*
+** descrizione: pass:none[use fsync to synchronize the configuration file with the storage device (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of configuration file]
+** tipo: bool
+** valori: on, off
+** valore predefinito: `+off+`
+
 * [[option_weechat.look.save_layout_on_exit]] *weechat.look.save_layout_on_exit*
 ** descrizione: pass:none[save layout on exit (buffers, windows, or both)]
 ** tipo: intero
diff --git a/doc/ja/autogen/user/weechat_options.adoc b/doc/ja/autogen/user/weechat_options.adoc
index 632bf727a..c7b7ce8cd 100644
--- a/doc/ja/autogen/user/weechat_options.adoc
+++ b/doc/ja/autogen/user/weechat_options.adoc
@@ -1094,6 +1094,12 @@
 ** 値: on, off
 ** デフォルト値: `+on+`
 
+* [[option_weechat.look.save_config_with_fsync]] *weechat.look.save_config_with_fsync*
+** 説明: pass:none[use fsync to synchronize the configuration file with the storage device (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of configuration file]
+** タイプ: ブール
+** 値: on, off
+** デフォルト値: `+off+`
+
 * [[option_weechat.look.save_layout_on_exit]] *weechat.look.save_layout_on_exit*
 ** 説明: pass:none[終了時にレイアウトを保存 (バッファ、ウィンドウ、両方)]
 ** タイプ: 整数
diff --git a/doc/pl/autogen/user/weechat_options.adoc b/doc/pl/autogen/user/weechat_options.adoc
index 50ce593a4..ffb113cf7 100644
--- a/doc/pl/autogen/user/weechat_options.adoc
+++ b/doc/pl/autogen/user/weechat_options.adoc
@@ -1094,6 +1094,12 @@
 ** wartości: on, off
 ** domyślna wartość: `+on+`
 
+* [[option_weechat.look.save_config_with_fsync]] *weechat.look.save_config_with_fsync*
+** opis: pass:none[use fsync to synchronize the configuration file with the storage device (see man fsync); this is slower but should prevent any data loss in case of power failure during the save of configuration file]
+** typ: bool
+** wartości: on, off
+** domyślna wartość: `+off+`
+
 * [[option_weechat.look.save_layout_on_exit]] *weechat.look.save_layout_on_exit*
 ** opis: pass:none[zapisz układ przy wyjściu (bufory, okna lub oba)]
 ** typ: liczba