1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/*
* Copyright (c) 2002-2014 Balabit
* Copyright (c) 1998-2012 Balázs Scheidler
* Copyright (c) 2013-2014 Gergely Nagy
*
* 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.
*
*/
typedef struct _TFCondState
{
TFSimpleFuncState super;
FilterExprNode *filter;
gint grep_max_count;
} TFCondState;
gboolean
tf_cond_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent, gint argc, gchar *argv[], GError **error)
{
TFCondState *state = (TFCondState *) s;
CfgLexer *lexer;
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
lexer = cfg_lexer_new_buffer(parent->cfg, argv[1], strlen(argv[1]));
if (!cfg_run_parser_with_main_context(parent->cfg, lexer, &filter_expr_parser, (gpointer *) &state->filter, NULL,
"conditional filter"))
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"$(%s) Error parsing conditional filter expression", argv[0]);
return FALSE;
}
if (!filter_expr_init(state->filter, parent->cfg))
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"$(%s) Error initializing conditional filter expression", argv[0]);
return FALSE;
}
memmove(&argv[1], &argv[2], sizeof(argv[0]) * (argc - 2));
if (!tf_simple_func_prepare(self, s, parent, argc - 1, argv, error))
return FALSE;
return TRUE;
}
static void
tf_cond_free_state(gpointer s)
{
TFCondState *state = (TFCondState *) s;
if (state->filter)
filter_expr_unref(state->filter);
tf_simple_func_free_state(&state->super);
}
gboolean
tf_grep_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent, gint argc, gchar *argv[], GError **error)
{
TFCondState *state = (TFCondState *) s;
GOptionContext *ctx;
gint max_count = 0;
GOptionEntry grep_options[] =
{
{ "max-count", 'm', 0, G_OPTION_ARG_INT, &max_count, NULL, NULL },
{ NULL }
};
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
ctx = g_option_context_new(argv[0]);
g_option_context_add_main_entries(ctx, grep_options, NULL);
if (!g_option_context_parse(ctx, &argc, &argv, error))
{
g_option_context_free(ctx);
g_free(argv);
return FALSE;
}
g_option_context_free(ctx);
if (argc < 3)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE, "$(%s) requires at least two arguments", argv[0]);
return FALSE;
}
state->grep_max_count = max_count;
return tf_cond_prepare(self, s, parent, argc, argv, error);
}
/*
* $(grep [opts] filter $nv1 $n2 ...)
*
* Options:
* --max-count or -m The maximum number of matches, 0 for unlimited
*/
void
tf_grep_call(LogTemplateFunction *self, gpointer s, const LogTemplateInvokeArgs *args, GString *result,
LogMessageValueType *type)
{
gint i, msg_ndx;
gboolean first = TRUE;
TFCondState *state = (TFCondState *) s;
gint count = 0;
*type = LM_VT_STRING;
for (msg_ndx = 0; msg_ndx < args->num_messages; msg_ndx++)
{
LogMessage *msg = args->messages[msg_ndx];
if (filter_expr_eval(state->filter, msg))
{
count++;
for (i = 0; i < state->super.argc; i++)
{
if (!first)
g_string_append_c(result, ',');
/* NOTE: not recursive, as the message context is just one message */
log_template_append_format(state->super.argv_templates[i], msg,
args->options, result);
first = FALSE;
}
if (state->grep_max_count && count >= state->grep_max_count)
break;
}
}
}
TEMPLATE_FUNCTION(TFCondState, tf_grep, tf_grep_prepare, NULL, tf_grep_call, tf_cond_free_state, NULL);
gboolean
tf_if_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent, gint argc, gchar *argv[], GError **error)
{
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
if (argc != 4)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE, "$(if) requires three arguments");
return FALSE;
}
return tf_cond_prepare(self, s, parent, argc, argv, error);
}
void
tf_if_call(LogTemplateFunction *self, gpointer s, const LogTemplateInvokeArgs *args, GString *result,
LogMessageValueType *type)
{
TFCondState *state = (TFCondState *) s;
if (filter_expr_eval_with_context(state->filter, args->messages, args->num_messages, args->options))
{
log_template_append_format_value_and_type_with_context(state->super.argv_templates[0],
args->messages, args->num_messages, args->options,
result, type);
}
else
{
log_template_append_format_value_and_type_with_context(state->super.argv_templates[1],
args->messages, args->num_messages, args->options,
result, type);
}
}
TEMPLATE_FUNCTION(TFCondState, tf_if, tf_if_prepare, NULL, tf_if_call, tf_cond_free_state, NULL);
static void
tf_or (LogMessage *msg, gint argc, GString *argv[], GString *result, LogMessageValueType *type)
{
gint i;
*type = LM_VT_STRING;
for (i = 0; i < argc; i++)
{
if (argv[i]->len == 0)
continue;
g_string_append_len (result, argv[i]->str, argv[i]->len);
break;
}
}
TEMPLATE_FUNCTION_SIMPLE(tf_or);
|
