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/*****************************************************************************
* syslog.c: POSIX syslog logger plugin
*****************************************************************************
* Copyright (C) 2002-2008 the VideoLAN team
* Copyright © 2007-2015 Rémi Denis-Courmont
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <stdarg.h>
#include <syslog.h>
static const int priorities[4] = {
[VLC_MSG_INFO] = LOG_INFO,
[VLC_MSG_ERR] = LOG_ERR,
[VLC_MSG_WARN] = LOG_WARNING,
[VLC_MSG_DBG] = LOG_DEBUG,
};
static void Log(void *opaque, int type, const vlc_log_t *meta,
const char *format, va_list ap)
{
static const char default_msg[] = "message lost";
char *str;
int priority = priorities[type];
if (vasprintf(&str, format, ap) == -1)
str = (char *)default_msg;
if (meta->psz_header != NULL)
syslog(priority, "[%s] %s: %s", meta->psz_header, meta->psz_module,
str);
else
syslog(priority, "%s: %s", meta->psz_module, str);
if (str != default_msg)
free(str);
(void) opaque;
}
/* First in list is the default facility used. */
#define DEFINE_SYSLOG_FACILITY \
DEF("user", LOG_USER), \
DEF("daemon", LOG_DAEMON), \
DEF("local0", LOG_LOCAL0), \
DEF("local1", LOG_LOCAL1), \
DEF("local2", LOG_LOCAL2), \
DEF("local3", LOG_LOCAL3), \
DEF("local4", LOG_LOCAL4), \
DEF("local5", LOG_LOCAL5), \
DEF("local6", LOG_LOCAL6), \
DEF("local7", LOG_LOCAL7)
#define DEF(a,b) a
static const char *const fac_names[] = { DEFINE_SYSLOG_FACILITY };
#undef DEF
#define DEF(a,b) b
static const int fac_ids[] = { DEFINE_SYSLOG_FACILITY };
#undef DEF
#undef DEFINE_SYSLOG_FACILITY
static int var_InheritFacility(vlc_object_t *obj, const char *varname)
{
char *str = var_InheritString(obj, varname);
if (unlikely(str == NULL))
return LOG_USER; /* LOG_USEr is the spec default. */
for (size_t i = 0; i < sizeof (fac_ids) / sizeof (fac_ids[0]); i++)
{
if (!strcmp(str, fac_names[i]))
{
free(str);
return fac_ids[i];
}
}
msg_Warn(obj, "unknown syslog facility \"%s\"", str);
free(str);
return LOG_USER;
}
static const char default_ident[] = PACKAGE;
static vlc_log_cb Open(vlc_object_t *obj, void **sysp)
{
if (!var_InheritBool(obj, "syslog"))
return NULL;
char *ident = var_InheritString(obj, "syslog-ident");
if (ident == NULL)
ident = (char *)default_ident;
*sysp = ident;
/* Open log */
int facility = var_InheritFacility(obj, "syslog-facility");
openlog(ident, LOG_PID | LOG_NDELAY, facility);
/* Set priority filter */
int mask = LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING) | LOG_MASK(LOG_INFO);
if (var_InheritBool(obj, "syslog-debug"))
mask |= LOG_MASK(LOG_DEBUG);
setlogmask(mask);
return Log;
}
static void Close(void *opaque)
{
char *ident = opaque;
closelog();
if (ident != default_ident)
free(ident);
}
#define SYSLOG_TEXT N_("System log (syslog)")
#define SYSLOG_LONGTEXT N_("Emit log messages through the POSIX system log.")
#define SYSLOG_DEBUG_TEXT N_("Debug messages")
#define SYSLOG_DEBUG_LONGTEXT N_("Include debug messages in system log.")
#define SYSLOG_IDENT_TEXT N_("Identity")
#define SYSLOG_IDENT_LONGTEXT N_("Process identity in system log.")
#define SYSLOG_FACILITY_TEXT N_("Facility")
#define SYSLOG_FACILITY_LONGTEXT N_("System logging facility.")
vlc_module_begin()
set_shortname(N_( "syslog" ))
set_description(N_("System logger (syslog)"))
set_category(CAT_ADVANCED)
set_subcategory(SUBCAT_ADVANCED_MISC)
set_capability("logger", 20)
set_callbacks(Open, Close)
add_bool("syslog", false, SYSLOG_TEXT, SYSLOG_LONGTEXT,
false)
add_bool("syslog-debug", false, SYSLOG_DEBUG_TEXT, SYSLOG_DEBUG_LONGTEXT,
false)
add_string("syslog-ident", default_ident, SYSLOG_IDENT_TEXT,
SYSLOG_IDENT_LONGTEXT, true)
add_string("syslog-facility", fac_names[0], SYSLOG_FACILITY_TEXT,
SYSLOG_FACILITY_LONGTEXT, true)
change_string_list(fac_names, fac_names)
vlc_module_end()
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