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/*
* Copyright (c) 2014 BalaBit IT Ltd, Budapest, Hungary
* Copyright (c) 2014 Gergely Nagy <algernon@balabit.hu>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*/
#include <syslog-ng.h>
#include <logmsg/logmsg.h>
#include <plugin.h>
#include <plugin-types.h>
#include <cfg.h>
#include <parse-number.h>
#include <template/simple-function.h>
#include <grp.h>
#include <pwd.h>
#include <netdb.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <stddef.h>
typedef gboolean (*lookup_method)(gchar *key, gchar *member_name, GString *result);
typedef gboolean (*format_member)(gchar *member_name, gpointer member, GString *result);
typedef struct
{
gchar *member_name;
format_member format;
size_t offset;
} formatter_map_t;
static gboolean
_getent_format_array(gchar *member_name, gpointer member, GString *result)
{
int i = 0;
char *o = *(char **)member;
char *p = *(char **)o;
char *sep = "";
do
{
g_string_append(result, sep);
g_string_append(result, p);
sep = ",";
p = *((char **)o + ++i);
}
while (p != NULL && p != '\0');
return TRUE;
}
static gboolean
_getent_format_string(gchar *member_name, gpointer member, GString *result)
{
char *value = *(char **)member;
g_string_append(result, value);
return TRUE;
}
static gboolean
_getent_format_uid_gid(gchar *member_name, gpointer member, GString *result)
{
if (strcmp(member_name, "uid") == 0)
{
uid_t u = *(uid_t *)member;
g_string_append_printf(result, "%" G_GUINT64_FORMAT, (guint64)u);
}
else
{
gid_t g = *(gid_t *)member;
g_string_append_printf(result, "%" G_GUINT64_FORMAT, (guint64)g);
}
return TRUE;
}
static int
_find_formatter(formatter_map_t *map, gchar *member_name)
{
gint i = 0;
while (map[i].member_name != NULL)
{
if (strcmp(map[i].member_name, member_name) == 0)
return i;
i++;
}
return -1;
}
#include "getent-protocols.c"
#include "getent-services.c"
#include "getent-group.c"
#include "getent-passwd.c"
static struct
{
gchar *entity;
lookup_method lookup;
} tf_getent_lookup_map[] = {
{ "group", tf_getent_group },
{ "passwd", tf_getent_passwd },
{ "services", tf_getent_services },
{ "protocols", tf_getent_protocols },
{ NULL, NULL }
};
static lookup_method
tf_getent_find_lookup_method(gchar *entity)
{
gint i = 0;
while (tf_getent_lookup_map[i].entity != NULL)
{
if (strcmp(tf_getent_lookup_map[i].entity, entity) == 0)
return tf_getent_lookup_map[i].lookup;
i++;
}
return NULL;
}
static gboolean
tf_getent(LogMessage *msg, gint argc, GString *argv[], GString *result)
{
lookup_method lookup;
if (argc != 2 && argc != 3)
{
msg_error("$(getent) takes either two or three arguments",
evt_tag_int("argc", argc),
NULL);
return FALSE;
}
lookup = tf_getent_find_lookup_method(argv[0]->str);
if (!lookup)
{
msg_error("Unsupported $(getent) NSS service",
evt_tag_str("service", argv[0]->str),
NULL);
return FALSE;
}
return lookup(argv[1]->str, (argc == 2) ? NULL : argv[2]->str, result);
}
TEMPLATE_FUNCTION_SIMPLE(tf_getent);
static Plugin getent_plugins[] =
{
TEMPLATE_FUNCTION_PLUGIN(tf_getent, "getent"),
};
gboolean
getent_plugin_module_init(GlobalConfig *cfg, CfgArgs *args)
{
plugin_register(cfg, getent_plugins, G_N_ELEMENTS(getent_plugins));
return TRUE;
}
const ModuleInfo module_info =
{
.canonical_name = "getent-plugin",
.version = SYSLOG_NG_VERSION,
.description = "The getent module provides getent template functions for syslog-ng.",
.core_revision = VERSION_CURRENT_VER_ONLY,
.plugins = getent_plugins,
.plugins_len = G_N_ELEMENTS(getent_plugins),
};
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