logger: fix write in log file if it has been deleted or renamed (closes #123)

17 files changed, 199 insertions, 81 deletions

diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index c4ef38542..e9ce96642 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -39,6 +39,7 @@ Bug fixes::
   * buflist: fix extra spaces between buffers when conditions are used to hide buffers (regression introduced in version 2.6) (issue #1403)
   * irc: remove option irc.network.channel_encode, add server option "charset_message" to control which part of the IRC message is decoded/encoded to the target charset (issue #832)
   * irc: use path from option xfer.file.upload_path to complete filename in command "/dcc send" (issue #60)
+  * logger: fix write in log file if it has been deleted or renamed (issue #123)
   * xfer: fix memory leak when a xfer is freed and when the plugin is unloaded
 
 Tests::
diff --git a/po/cs.po b/po/cs.po
index 75e97bd74..92a94fa63 100644
--- a/po/cs.po
+++ b/po/cs.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Ondřej Súkup <mimi.vx@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -9742,6 +9742,10 @@ msgstr "%s%s: nemohu vytvořit adresář pro logy (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: nemůžu zapsat log soubor \"%s\""
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: nemůžu zapsat log soubor \"%s\""
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Začátek logu  ****"
diff --git a/po/de.po b/po/de.po
index ccd458c34..f0252b836 100644
--- a/po/de.po
+++ b/po/de.po
@@ -24,7 +24,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-10-03 15:25+0200\n"
 "Last-Translator: Nils Görs <weechatter@arcor.de>\n"
 "Language-Team: German <kde-i18n-de@kde.org>\n"
@@ -11559,6 +11559,10 @@ msgstr ""
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: Protokoll-Datei \"%s\" kann nicht geschrieben werden: %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: Protokoll-Datei \"%s\" kann nicht geschrieben werden: %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Beginn der Protokoll-Datei  ****"
diff --git a/po/es.po b/po/es.po
index b5f33a54a..7df20e11f 100644
--- a/po/es.po
+++ b/po/es.po
@@ -22,7 +22,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Elián Hanisch <lambdae2@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -10052,6 +10052,10 @@ msgstr "%s%s: imposible crear directorio para registros (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: imposible escribir en el registro \"%s\": %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: imposible escribir en el registro \"%s\": %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Comienzo del registro  ****"
diff --git a/po/fr.po b/po/fr.po
index 655442f7a..ea997b71f 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -21,8 +21,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
-"PO-Revision-Date: 2019-10-06 09:22+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
+"PO-Revision-Date: 2019-10-06 13:25+0200\n"
 "Last-Translator: Sébastien Helleu <flashcode@flashtux.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
 "Language: fr\n"
@@ -11289,6 +11289,10 @@ msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s : impossible d'écrire le fichier log \"%s\" : %s"
 
 #, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s : impossible de récupérer le statut du fichier de log \"%s\" : %s"
+
+#, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Début du log  ****"
 
diff --git a/po/hu.po b/po/hu.po
index 4edf75458..a5c728ba9 100644
--- a/po/hu.po
+++ b/po/hu.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Andras Voroskoi <voroskoi@frugalware.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -9123,6 +9123,10 @@ msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "Nem sikerült a(z) \"%s\" naplófájlt írni\n"
 
 #, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "Nem sikerült a(z) \"%s\" naplófájlt írni\n"
+
+#, fuzzy, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "****  Naplófájl kezdete  "
 
diff --git a/po/it.po b/po/it.po
index aa95ce994..4cd783e24 100644
--- a/po/it.po
+++ b/po/it.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Esteban I. Ruiz Moreno <exio4.com@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -10237,6 +10237,10 @@ msgstr "%s%s: impossibile creare la directory per i log (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: impossibile scrivere il file di log \"%s\": %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: impossibile scrivere il file di log \"%s\": %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Inizio del log  ****"
diff --git a/po/ja.po b/po/ja.po
index e0ee6e202..07cd82a8c 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-09-22 18:54+0200\n"
 "Last-Translator: AYANOKOUZI, Ryuunosuke <i38w7i3@yahoo.co.jp>\n"
 "Language-Team: Japanese <https://github.com/l/weechat/tree/master/"
@@ -10869,6 +10869,10 @@ msgstr "%s%s: ログ用のディレクトリを作成できません (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: ログファイル \"%s\" の書き込みに失敗: %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: ログファイル \"%s\" の書き込みに失敗: %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  ログの最初  ****"
diff --git a/po/pl.po b/po/pl.po
index 5ae510b6b..8dce6d07b 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -22,7 +22,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-09-22 18:54+0200\n"
 "Last-Translator: Krzysztof Korościk <soltys@soltys.info>\n"
 "Language-Team: Polish <kde-i18n-doc@kde.org>\n"
@@ -11035,6 +11035,10 @@ msgstr "%s%s: nie można utworzyć katalogu dla logów (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: nie można zapisać pliku z logiem \"%s\": %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: nie można zapisać pliku z logiem \"%s\": %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Początek logu  ****"
diff --git a/po/pt.po b/po/pt.po
index b45ae64e7..da6569796 100644
--- a/po/pt.po
+++ b/po/pt.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-09-22 18:54+0200\n"
 "Last-Translator: Vasco Almeida <vascomalmeida@sapo.pt>\n"
 "Language-Team: Portuguese <>\n"
@@ -10704,6 +10704,10 @@ msgstr "%s%s: não foi possível criar diretório para registos (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: não foi possível escrever o ficheiro de registo \"%s\": %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: não foi possível escrever o ficheiro de registo \"%s\": %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t****  Início do registo  ****"
diff --git a/po/pt_BR.po b/po/pt_BR.po
index 9d92eb611..ef08ae15f 100644
--- a/po/pt_BR.po
+++ b/po/pt_BR.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:32+0200\n"
 "Last-Translator: Eduardo Elias <camponez@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -9570,6 +9570,10 @@ msgstr "%s%s: não foi possível criar diretório para registros (\"%s\")"
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%s%s: não foi possível escrever arquivo de registro \"%s\": %s"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%s%s: não foi possível escrever arquivo de registro \"%s\": %s"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "%s\t***  Início do registro  ****"
diff --git a/po/ru.po b/po/ru.po
index efaa2dd06..3412466b0 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:32+0200\n"
 "Last-Translator: Aleksey V Zapparov AKA ixti <ixti@member.fsf.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -9160,6 +9160,10 @@ msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "Не могу записать лог-файл \"%s\"\n"
 
 #, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "Не могу записать лог-файл \"%s\"\n"
+
+#, fuzzy, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr "**** Начало log-файла"
 
diff --git a/po/tr.po b/po/tr.po
index 4e35404e9..78269a508 100644
--- a/po/tr.po
+++ b/po/tr.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2019-05-13 21:32+0200\n"
 "Last-Translator: Hasan Kiran <sunder67@hotmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -8329,6 +8329,10 @@ msgstr ""
 msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr "%sHata: dosya \"%s\" oluşturulamaz"
 
+#, fuzzy, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr "%sHata: dosya \"%s\" oluşturulamaz"
+
 #, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr ""
diff --git a/po/weechat.pot b/po/weechat.pot
index 2dacbbae0..920b98bea 100644
--- a/po/weechat.pot
+++ b/po/weechat.pot
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-06 09:20+0200\n"
+"POT-Creation-Date: 2019-10-06 13:24+0200\n"
 "PO-Revision-Date: 2014-08-16 10:27+0200\n"
 "Last-Translator: Sébastien Helleu <flashcode@flashtux.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -8193,6 +8193,10 @@ msgid "%s%s: unable to write log file \"%s\": %s"
 msgstr ""
 
 #, c-format
+msgid "%s%s: unable to get file status of log file \"%s\": %s"
+msgstr ""
+
+#, c-format
 msgid "%s\t****  Beginning of log  ****"
 msgstr ""
 
diff --git a/src/plugins/logger/logger-buffer.c b/src/plugins/logger/logger-buffer.c
index b5a2f7e49..129fe1b23 100644
--- a/src/plugins/logger/logger-buffer.c
+++ b/src/plugins/logger/logger-buffer.c
@@ -91,6 +91,7 @@ logger_buffer_add (struct t_gui_buffer *buffer, int log_level)
         new_logger_buffer->buffer = buffer;
         new_logger_buffer->log_filename = NULL;
         new_logger_buffer->log_file = NULL;
+        new_logger_buffer->log_file_inode = 0;
         new_logger_buffer->log_enabled = 1;
         new_logger_buffer->log_level = log_level;
         new_logger_buffer->write_start_info_line = 1;
@@ -234,6 +235,8 @@ logger_buffer_add_to_infolist (struct t_infolist *infolist,
         return 0;
     if (!weechat_infolist_new_var_pointer (ptr_item, "log_file", logger_buffer->log_file))
         return 0;
+    if (!weechat_infolist_new_var_buffer (ptr_item, "log_file_inode", &(logger_buffer->log_file_inode), sizeof(logger_buffer->log_file_inode)))
+        return 0;
     if (!weechat_infolist_new_var_integer (ptr_item, "log_enabled", logger_buffer->log_enabled))
         return 0;
     if (!weechat_infolist_new_var_integer (ptr_item, "log_level", logger_buffer->log_level))
diff --git a/src/plugins/logger/logger-buffer.h b/src/plugins/logger/logger-buffer.h
index 8163bdfa7..c706a9098 100644
--- a/src/plugins/logger/logger-buffer.h
+++ b/src/plugins/logger/logger-buffer.h
@@ -21,6 +21,9 @@
 #define WEECHAT_PLUGIN_LOGGER_BUFFER_H
 
 #include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 struct t_infolist;
 
@@ -29,6 +32,7 @@ struct t_logger_buffer
     struct t_gui_buffer *buffer;          /* pointer to buffer              */
     char *log_filename;                   /* log filename                   */
     FILE *log_file;                       /* log file                       */
+    ino_t log_file_inode;                 /* inode of log file              */
     int log_enabled;                      /* log enabled ?                  */
     int log_level;                        /* log level (0..9)               */
     int write_start_info_line;            /* 1 if start info line must be   */
diff --git a/src/plugins/logger/logger.c b/src/plugins/logger/logger.c
index a41d44dfe..3532b9716 100644
--- a/src/plugins/logger/logger.c
+++ b/src/plugins/logger/logger.c
@@ -516,87 +516,143 @@ logger_set_log_filename (struct t_logger_buffer *logger_buffer)
 }
 
 /*
- * Writes a line to log file.
+ * Creates a log file.
+ *
+ * Returns:
+ *   1: OK
+ *   0: error
  */
 
-void
-logger_write_line (struct t_logger_buffer *logger_buffer,
-                   const char *format, ...)
+int
+logger_create_log_file (struct t_logger_buffer *logger_buffer)
 {
-    char *message, buf_time[256], buf_beginning[1024], *charset;
+    char *charset, *message, buf_time[256], buf_beginning[1024];
+    int log_level, rc;
     time_t seconds;
     struct tm *date_tmp;
-    int log_level;
+    struct stat statbuf;
 
-    if (!logger_buffer->log_file)
+    if (logger_buffer->log_file)
     {
-        log_level = logger_get_level_for_buffer (logger_buffer->buffer);
-        if (log_level == 0)
-        {
-            logger_buffer_free (logger_buffer);
-            return;
-        }
-        if (!logger_create_directory ())
-        {
-            weechat_printf_date_tags (
-                NULL, 0, "no_log",
-                _("%s%s: unable to create directory for logs "
-                  "(\"%s\")"),
-                weechat_prefix ("error"), LOGGER_PLUGIN_NAME,
-                weechat_config_string (logger_config_file_path));
-            logger_buffer_free (logger_buffer);
-            return;
-        }
-        if (!logger_buffer->log_filename)
-            logger_set_log_filename (logger_buffer);
-        if (!logger_buffer->log_filename)
+        /*
+         * check that the inode has not changed, otherwise that means the file
+         * was deleted, and we must reopen it
+         */
+        rc = stat (logger_buffer->log_filename, &statbuf);
+        if ((rc == 0) && (statbuf.st_ino == logger_buffer->log_file_inode))
         {
-            logger_buffer_free (logger_buffer);
-            return;
+            /* inode has not changed, we can write in this file */
+            return 1;
         }
+        fclose (logger_buffer->log_file);
+        logger_buffer->log_file = NULL;
+        logger_buffer->log_file_inode = 0;
+    }
 
-        logger_buffer->log_file =
-            fopen (logger_buffer->log_filename, "a");
-        if (!logger_buffer->log_file)
-        {
-            weechat_printf_date_tags (
-                NULL, 0, "no_log",
-                _("%s%s: unable to write log file \"%s\": %s"),
-                weechat_prefix ("error"), LOGGER_PLUGIN_NAME,
-                logger_buffer->log_filename, strerror (errno));
-            logger_buffer_free (logger_buffer);
-            return;
-        }
+    /* get log level */
+    log_level = logger_get_level_for_buffer (logger_buffer->buffer);
+    if (log_level == 0)
+    {
+        logger_buffer_free (logger_buffer);
+        return 0;
+    }
 
-        if (weechat_config_boolean (logger_config_file_info_lines)
-            && logger_buffer->write_start_info_line)
+    /* create directory */
+    if (!logger_create_directory ())
+    {
+        weechat_printf_date_tags (
+            NULL, 0, "no_log",
+            _("%s%s: unable to create directory for logs "
+              "(\"%s\")"),
+            weechat_prefix ("error"), LOGGER_PLUGIN_NAME,
+            weechat_config_string (logger_config_file_path));
+        logger_buffer_free (logger_buffer);
+        return 0;
+    }
+    if (!logger_buffer->log_filename)
+        logger_set_log_filename (logger_buffer);
+    if (!logger_buffer->log_filename)
+    {
+        logger_buffer_free (logger_buffer);
+        return 0;
+    }
+
+    /* create or append to log file */
+    logger_buffer->log_file =
+        fopen (logger_buffer->log_filename, "a");
+    if (!logger_buffer->log_file)
+    {
+        weechat_printf_date_tags (
+            NULL, 0, "no_log",
+            _("%s%s: unable to write log file \"%s\": %s"),
+            weechat_prefix ("error"), LOGGER_PLUGIN_NAME,
+            logger_buffer->log_filename, strerror (errno));
+        logger_buffer_free (logger_buffer);
+        return 0;
+    }
+
+    /* get file inode */
+    rc = stat (logger_buffer->log_filename, &statbuf);
+    if (rc != 0)
+    {
+        weechat_printf_date_tags (
+            NULL, 0, "no_log",
+            _("%s%s: unable to get file status of log file \"%s\": %s"),
+            weechat_prefix ("error"), LOGGER_PLUGIN_NAME,
+            logger_buffer->log_filename, strerror (errno));
+        fclose (logger_buffer->log_file);
+        logger_buffer->log_file = NULL;
+        logger_buffer->log_file_inode = 0;
+        logger_buffer_free (logger_buffer);
+        return 0;
+    }
+    logger_buffer->log_file_inode = statbuf.st_ino;
+
+    /* write info line */
+    if (weechat_config_boolean (logger_config_file_info_lines)
+        && logger_buffer->write_start_info_line)
+    {
+        buf_time[0] = '\0';
+        seconds = time (NULL);
+        date_tmp = localtime (&seconds);
+        if (date_tmp)
         {
-            buf_time[0] = '\0';
-            seconds = time (NULL);
-            date_tmp = localtime (&seconds);
-            if (date_tmp)
-            {
-                if (strftime (buf_time, sizeof (buf_time) - 1,
-                              weechat_config_string (logger_config_file_time_format),
-                              date_tmp) == 0)
-                    buf_time[0] = '\0';
-            }
-            snprintf (buf_beginning, sizeof (buf_beginning),
-                      _("%s\t****  Beginning of log  ****"),
-                      buf_time);
-            charset = weechat_info_get ("charset_terminal", "");
-            message = (charset) ?
-                weechat_iconv_from_internal (charset, buf_beginning) : NULL;
-            fprintf (logger_buffer->log_file,
-                     "%s\n", (message) ? message : buf_beginning);
-            if (charset)
-                free (charset);
-            if (message)
-                free (message);
-            logger_buffer->flush_needed = 1;
+            if (strftime (buf_time, sizeof (buf_time) - 1,
+                          weechat_config_string (logger_config_file_time_format),
+                          date_tmp) == 0)
+                buf_time[0] = '\0';
         }
-        logger_buffer->write_start_info_line = 0;
+        snprintf (buf_beginning, sizeof (buf_beginning),
+                  _("%s\t****  Beginning of log  ****"),
+                  buf_time);
+        charset = weechat_info_get ("charset_terminal", "");
+        message = (charset) ?
+            weechat_iconv_from_internal (charset, buf_beginning) : NULL;
+        fprintf (logger_buffer->log_file,
+                 "%s\n", (message) ? message : buf_beginning);
+        if (charset)
+            free (charset);
+        if (message)
+            free (message);
+        logger_buffer->flush_needed = 1;
     }
+    logger_buffer->write_start_info_line = 0;
+
+    return 1;
+}
+
+/*
+ * Writes a line to log file.
+ */
+
+void
+logger_write_line (struct t_logger_buffer *logger_buffer,
+                   const char *format, ...)
+{
+    char *charset, *message;
+
+    if (!logger_create_log_file (logger_buffer))
+        return;
 
     weechat_va_format (format);
     if (vbuffer)
@@ -656,6 +712,7 @@ logger_stop (struct t_logger_buffer *logger_buffer, int write_info_line)
         }
         fclose (logger_buffer->log_file);
         logger_buffer->log_file = NULL;
+        logger_buffer->log_file_inode = 0;
     }
     logger_buffer_free (logger_buffer);
 }
@@ -716,6 +773,7 @@ logger_start_buffer (struct t_gui_buffer *buffer, int write_info_line)
                     {
                         fclose (ptr_logger_buffer->log_file);
                         ptr_logger_buffer->log_file = NULL;
+                        ptr_logger_buffer->log_file_inode = 0;
                     }
                 }
             }