modules/logger/journal.c

   1 /*****************************************************************************
   2  * journal.c: SystemD journal logger plugin
   3  *****************************************************************************
   4  * Copyright © 2015 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <stdarg.h>
  26 #include <inttypes.h>
  27 #include <syslog.h>
  28 #include <systemd/sd-journal.h>
  29
  30 #include <vlc_common.h>
  31 #include <vlc_plugin.h>
  32
  33 static const int priorities[4] = {
  34     [VLC_MSG_INFO] = LOG_INFO,
  35     [VLC_MSG_ERR]  = LOG_ERR,
  36     [VLC_MSG_WARN] = LOG_WARNING,
  37     [VLC_MSG_DBG]  = LOG_DEBUG,
  38 };
  39
  40 static void Log(void *opaque, int type, const vlc_log_t *meta,
  41                 const char *format, va_list ap)
  42 {
  43     static const char default_msg[] = "message lost";
  44     char *msg;
  45
  46     if (vasprintf(&msg, format, ap) == -1)
  47         msg = (char *)default_msg;
  48
  49     sd_journal_send("MESSAGE=%s", msg,
  50         "PRIORITY=%d", priorities[type],
  51         "CODE_FILE=%s", (meta->file != NULL) ? meta->file : "",
  52         "CODE_LINE=%u", meta->line,
  53         "CODE_FUNC=%s", (meta->func != NULL) ? meta->func : "",
  54         //"ERRNO=%d"
  55         "VLC_TID=%lu" /* change to OBJECT_TID if standardized */, meta->tid,
  56         "VLC_OBJECT_ID=%"PRIxPTR, meta->i_object_id,
  57         "VLC_OBJECT_TYPE=%s", meta->psz_object_type,
  58         "VLC_MODULE=%s", meta->psz_module,
  59         "VLC_HEADER=%s", (meta->psz_header != NULL) ? meta->psz_header : "",
  60         NULL);
  61
  62     if (msg != default_msg)
  63         free(msg);
  64     (void) opaque;
  65 }
  66
  67 static vlc_log_cb Open(vlc_object_t *obj, void **sysp)
  68 {
  69     if (!var_InheritBool(obj, "syslog"))
  70         return NULL;
  71
  72     (void) sysp;
  73     return Log;
  74 }
  75
  76 vlc_module_begin()
  77     set_shortname(N_("Journal"))
  78     set_description(N_("SystemD journal logger"))
  79     set_category(CAT_ADVANCED)
  80     set_subcategory(SUBCAT_ADVANCED_MISC)
  81     set_capability("logger", 30)
  82     set_callbacks(Open, NULL)
  83     add_shortcut("journal")
  84 vlc_module_end()