Bug Summary

File:http/modules/ngx_http_log_module.c
Location:line 356, column 16
Description:Dereference of null pointer

Annotated Source Code

1
2/*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8#include <ngx_config.h>
9#include <ngx_core.h>
10#include <ngx_http.h>
11
12#if (NGX_ZLIB1)
13#include <zlib.h>
14#endif
15
16
17typedef struct ngx_http_log_op_s ngx_http_log_op_t;
18
19typedef u_char *(*ngx_http_log_op_run_pt) (ngx_http_request_t *r, u_char *buf,
20 ngx_http_log_op_t *op);
21
22typedef size_t (*ngx_http_log_op_getlen_pt) (ngx_http_request_t *r,
23 uintptr_t data);
24
25
26struct ngx_http_log_op_s {
27 size_t len;
28 ngx_http_log_op_getlen_pt getlen;
29 ngx_http_log_op_run_pt run;
30 uintptr_t data;
31};
32
33
34typedef struct {
35 ngx_str_t name;
36 ngx_array_t *flushes;
37 ngx_array_t *ops; /* array of ngx_http_log_op_t */
38} ngx_http_log_fmt_t;
39
40
41typedef struct {
42 ngx_array_t formats; /* array of ngx_http_log_fmt_t */
43 ngx_uint_t combined_used; /* unsigned combined_used:1 */
44} ngx_http_log_main_conf_t;
45
46
47typedef struct {
48 u_char *start;
49 u_char *pos;
50 u_char *last;
51
52 ngx_event_t *event;
53 ngx_msec_t flush;
54 ngx_int_t gzip;
55} ngx_http_log_buf_t;
56
57
58typedef struct {
59 ngx_array_t *lengths;
60 ngx_array_t *values;
61} ngx_http_log_script_t;
62
63
64typedef struct {
65 ngx_open_file_t *file;
66 ngx_http_log_script_t *script;
67 time_t disk_full_time;
68 time_t error_log_time;
69 ngx_http_log_fmt_t *format;
70} ngx_http_log_t;
71
72
73typedef struct {
74 ngx_array_t *logs; /* array of ngx_http_log_t */
75
76 ngx_open_file_cache_t *open_file_cache;
77 time_t open_file_cache_valid;
78 ngx_uint_t open_file_cache_min_uses;
79
80 ngx_uint_t off; /* unsigned off:1 */
81} ngx_http_log_loc_conf_t;
82
83
84typedef struct {
85 ngx_str_t name;
86 size_t len;
87 ngx_http_log_op_run_pt run;
88} ngx_http_log_var_t;
89
90
91static void ngx_http_log_write(ngx_http_request_t *r, ngx_http_log_t *log,
92 u_char *buf, size_t len);
93static ssize_t ngx_http_log_script_write(ngx_http_request_t *r,
94 ngx_http_log_script_t *script, u_char **name, u_char *buf, size_t len);
95
96#if (NGX_ZLIB1)
97static ssize_t ngx_http_log_gzip(ngx_fd_t fd, u_char *buf, size_t len,
98 ngx_int_t level, ngx_log_t *log);
99
100static void *ngx_http_log_gzip_alloc(void *opaque, u_int items, u_int size);
101static void ngx_http_log_gzip_free(void *opaque, void *address);
102#endif
103
104static void ngx_http_log_flush(ngx_open_file_t *file, ngx_log_t *log);
105static void ngx_http_log_flush_handler(ngx_event_t *ev);
106
107static u_char *ngx_http_log_pipe(ngx_http_request_t *r, u_char *buf,
108 ngx_http_log_op_t *op);
109static u_char *ngx_http_log_time(ngx_http_request_t *r, u_char *buf,
110 ngx_http_log_op_t *op);
111static u_char *ngx_http_log_iso8601(ngx_http_request_t *r, u_char *buf,
112 ngx_http_log_op_t *op);
113static u_char *ngx_http_log_msec(ngx_http_request_t *r, u_char *buf,
114 ngx_http_log_op_t *op);
115static u_char *ngx_http_log_request_time(ngx_http_request_t *r, u_char *buf,
116 ngx_http_log_op_t *op);
117static u_char *ngx_http_log_status(ngx_http_request_t *r, u_char *buf,
118 ngx_http_log_op_t *op);
119static u_char *ngx_http_log_bytes_sent(ngx_http_request_t *r, u_char *buf,
120 ngx_http_log_op_t *op);
121static u_char *ngx_http_log_body_bytes_sent(ngx_http_request_t *r,
122 u_char *buf, ngx_http_log_op_t *op);
123static u_char *ngx_http_log_request_length(ngx_http_request_t *r, u_char *buf,
124 ngx_http_log_op_t *op);
125
126static ngx_int_t ngx_http_log_variable_compile(ngx_conf_t *cf,
127 ngx_http_log_op_t *op, ngx_str_t *value);
128static size_t ngx_http_log_variable_getlen(ngx_http_request_t *r,
129 uintptr_t data);
130static u_char *ngx_http_log_variable(ngx_http_request_t *r, u_char *buf,
131 ngx_http_log_op_t *op);
132static uintptr_t ngx_http_log_escape(u_char *dst, u_char *src, size_t size);
133
134
135static void *ngx_http_log_create_main_conf(ngx_conf_t *cf);
136static void *ngx_http_log_create_loc_conf(ngx_conf_t *cf);
137static char *ngx_http_log_merge_loc_conf(ngx_conf_t *cf, void *parent,
138 void *child);
139static char *ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd,
140 void *conf);
141static char *ngx_http_log_set_format(ngx_conf_t *cf, ngx_command_t *cmd,
142 void *conf);
143static char *ngx_http_log_compile_format(ngx_conf_t *cf,
144 ngx_array_t *flushes, ngx_array_t *ops, ngx_array_t *args, ngx_uint_t s);
145static char *ngx_http_log_open_file_cache(ngx_conf_t *cf, ngx_command_t *cmd,
146 void *conf);
147static ngx_int_t ngx_http_log_init(ngx_conf_t *cf);
148
149
150static ngx_command_t ngx_http_log_commands[] = {
151
152 { ngx_string("log_format"){ sizeof("log_format") - 1, (u_char *) "log_format" },
153 NGX_HTTP_MAIN_CONF0x02000000|NGX_HTTP_SRV_CONF0x04000000|NGX_HTTP_LOC_CONF0x08000000|NGX_CONF_2MORE0x00001000,
154 ngx_http_log_set_format,
155 NGX_HTTP_MAIN_CONF_OFFSET__builtin_offsetof(ngx_http_conf_ctx_t, main_conf),
156 0,
157 NULL((void*)0) },
158
159 { ngx_string("access_log"){ sizeof("access_log") - 1, (u_char *) "access_log" },
160 NGX_HTTP_MAIN_CONF0x02000000|NGX_HTTP_SRV_CONF0x04000000|NGX_HTTP_LOC_CONF0x08000000|NGX_HTTP_LIF_CONF0x40000000
161 |NGX_HTTP_LMT_CONF0x80000000|NGX_CONF_1MORE0x00000800,
162 ngx_http_log_set_log,
163 NGX_HTTP_LOC_CONF_OFFSET__builtin_offsetof(ngx_http_conf_ctx_t, loc_conf),
164 0,
165 NULL((void*)0) },
166
167 { ngx_string("open_log_file_cache"){ sizeof("open_log_file_cache") - 1, (u_char *) "open_log_file_cache"
},
168 NGX_HTTP_MAIN_CONF0x02000000|NGX_HTTP_SRV_CONF0x04000000|NGX_HTTP_LOC_CONF0x08000000|NGX_CONF_TAKE1234(0x00000002|0x00000004|0x00000008 |0x00000010),
169 ngx_http_log_open_file_cache,
170 NGX_HTTP_LOC_CONF_OFFSET__builtin_offsetof(ngx_http_conf_ctx_t, loc_conf),
171 0,
172 NULL((void*)0) },
173
174 ngx_null_command{ { 0, ((void*)0) }, 0, ((void*)0), 0, 0, ((void*)0) }
175};
176
177
178static ngx_http_module_t ngx_http_log_module_ctx = {
179 NULL((void*)0), /* preconfiguration */
180 ngx_http_log_init, /* postconfiguration */
181
182 ngx_http_log_create_main_conf, /* create main configuration */
183 NULL((void*)0), /* init main configuration */
184
185 NULL((void*)0), /* create server configuration */
186 NULL((void*)0), /* merge server configuration */
187
188 ngx_http_log_create_loc_conf, /* create location configuration */
189 ngx_http_log_merge_loc_conf /* merge location configuration */
190};
191
192
193ngx_module_t ngx_http_log_module = {
194 NGX_MODULE_V10, 0, 0, 0, 0, 0, 1,
195 &ngx_http_log_module_ctx, /* module context */
196 ngx_http_log_commands, /* module directives */
197 NGX_HTTP_MODULE0x50545448, /* module type */
198 NULL((void*)0), /* init master */
199 NULL((void*)0), /* init module */
200 NULL((void*)0), /* init process */
201 NULL((void*)0), /* init thread */
202 NULL((void*)0), /* exit thread */
203 NULL((void*)0), /* exit process */
204 NULL((void*)0), /* exit master */
205 NGX_MODULE_V1_PADDING0, 0, 0, 0, 0, 0, 0, 0
206};
207
208
209static ngx_str_t ngx_http_access_log = ngx_string(NGX_HTTP_LOG_PATH){ sizeof("logs/access.log") - 1, (u_char *) "logs/access.log"
};
210
211
212static ngx_str_t ngx_http_combined_fmt =
213 ngx_string("$remote_addr - $remote_user [$time_local] "{ sizeof("$remote_addr - $remote_user [$time_local] " "\"$request\" $status $body_bytes_sent "
"\"$http_referer\" \"$http_user_agent\"") - 1, (u_char *) "$remote_addr - $remote_user [$time_local] "
"\"$request\" $status $body_bytes_sent " "\"$http_referer\" \"$http_user_agent\""
}
214 "\"$request\" $status $body_bytes_sent "{ sizeof("$remote_addr - $remote_user [$time_local] " "\"$request\" $status $body_bytes_sent "
"\"$http_referer\" \"$http_user_agent\"") - 1, (u_char *) "$remote_addr - $remote_user [$time_local] "
"\"$request\" $status $body_bytes_sent " "\"$http_referer\" \"$http_user_agent\""
}
215 "\"$http_referer\" \"$http_user_agent\""){ sizeof("$remote_addr - $remote_user [$time_local] " "\"$request\" $status $body_bytes_sent "
"\"$http_referer\" \"$http_user_agent\"") - 1, (u_char *) "$remote_addr - $remote_user [$time_local] "
"\"$request\" $status $body_bytes_sent " "\"$http_referer\" \"$http_user_agent\""
};
216
217
218static ngx_http_log_var_t ngx_http_log_vars[] = {
219 { ngx_string("pipe"){ sizeof("pipe") - 1, (u_char *) "pipe" }, 1, ngx_http_log_pipe },
220 { ngx_string("time_local"){ sizeof("time_local") - 1, (u_char *) "time_local" }, sizeof("28/Sep/1970:12:00:00 +0600") - 1,
221 ngx_http_log_time },
222 { ngx_string("time_iso8601"){ sizeof("time_iso8601") - 1, (u_char *) "time_iso8601" }, sizeof("1970-09-28T12:00:00+06:00") - 1,
223 ngx_http_log_iso8601 },
224 { ngx_string("msec"){ sizeof("msec") - 1, (u_char *) "msec" }, NGX_TIME_T_LEN(sizeof("-9223372036854775808") - 1) + 4, ngx_http_log_msec },
225 { ngx_string("request_time"){ sizeof("request_time") - 1, (u_char *) "request_time" }, NGX_TIME_T_LEN(sizeof("-9223372036854775808") - 1) + 4,
226 ngx_http_log_request_time },
227 { ngx_string("status"){ sizeof("status") - 1, (u_char *) "status" }, NGX_INT_T_LENsizeof("-9223372036854775808") - 1, ngx_http_log_status },
228 { ngx_string("bytes_sent"){ sizeof("bytes_sent") - 1, (u_char *) "bytes_sent" }, NGX_OFF_T_LEN(sizeof("-9223372036854775808") - 1), ngx_http_log_bytes_sent },
229 { ngx_string("body_bytes_sent"){ sizeof("body_bytes_sent") - 1, (u_char *) "body_bytes_sent"
}, NGX_OFF_T_LEN(sizeof("-9223372036854775808") - 1),
230 ngx_http_log_body_bytes_sent },
231 { ngx_string("request_length"){ sizeof("request_length") - 1, (u_char *) "request_length" }, NGX_SIZE_T_LEN(sizeof("-9223372036854775808") - 1),
232 ngx_http_log_request_length },
233
234 { ngx_null_string{ 0, ((void*)0) }, 0, NULL((void*)0) }
235};
236
237
238static ngx_int_t
239ngx_http_log_handler(ngx_http_request_t *r)
240{
241 u_char *line, *p;
242 size_t len;
243 ngx_uint_t i, l;
244 ngx_http_log_t *log;
245 ngx_http_log_op_t *op;
246 ngx_http_log_buf_t *buffer;
247 ngx_http_log_loc_conf_t *lcf;
248
249 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
250 "http log handler");
251
252 lcf = ngx_http_get_module_loc_conf(r, ngx_http_log_module)(r)->loc_conf[ngx_http_log_module.ctx_index];
253
254 if (lcf->off) {
1
Taking false branch
→
255 return NGX_OK0;
256 }
257
258 log = lcf->logs->elts;
259 for (l = 0; l < lcf->logs->nelts; l++) {
2
←
Loop condition is true. Entering loop body
→
10
←
Loop condition is true. Entering loop body
→
18
←
Loop condition is true. Entering loop body
→
260
261 if (ngx_time()ngx_cached_time->sec == log[l].disk_full_time) {
3
←
Taking false branch
→
11
←
Taking false branch
→
19
←
Taking false branch
→
262
263 /*
264 * on FreeBSD writing to a full filesystem with enabled softupdates
265 * may block process for much longer time than writing to non-full
266 * filesystem, so we skip writing to a log for one second
267 */
268
269 continue;
270 }
271
272 ngx_http_script_flush_no_cacheable_variables(r, log[l].format->flushes);
273
274 len = 0;
275 op = log[l].format->ops->elts;
276 for (i = 0; i < log[l].format->ops->nelts; i++) {
4
←
Loop condition is false. Execution continues on line 285
→
12
←
Loop condition is false. Execution continues on line 285
→
20
←
Loop condition is false. Execution continues on line 285
→
277 if (op[i].len == 0) {
278 len += op[i].getlen(r, op[i].data);
279
280 } else {
281 len += op[i].len;
282 }
283 }
284
285 len += NGX_LINEFEED_SIZE1;
286
287 buffer = log[l].file ? log[l].file->data : NULL((void*)0);
5
←
'?' condition is false
→
13
←
'?' condition is false
→
21
←
Assuming pointer value is null
→
22
←
'?' condition is false
→
288
289 if (buffer) {
6
←
Taking false branch
→
14
←
Taking false branch
→
23
←
Taking false branch
→
290
291 if (len > (size_t) (buffer->last - buffer->pos)) {
292
293 ngx_http_log_write(r, &log[l], buffer->start,
294 buffer->pos - buffer->start);
295
296 buffer->pos = buffer->start;
297 }
298
299 if (len <= (size_t) (buffer->last - buffer->pos)) {
300
301 p = buffer->pos;
302
303 if (buffer->event && p == buffer->start) {
304 ngx_add_timerngx_event_add_timer(buffer->event, buffer->flush);
305 }
306
307 for (i = 0; i < log[l].format->ops->nelts; i++) {
308 p = op[i].run(r, p, &op[i]);
309 }
310
311 ngx_linefeed(p)*p++ = (u_char) 10;;
312
313 buffer->pos = p;
314
315 continue;
316 }
317
318 if (buffer->event && buffer->event->timer_set) {
319 ngx_del_timerngx_event_del_timer(buffer->event);
320 }
321 }
322
323 line = ngx_pnalloc(r->pool, len);
324 if (line == NULL((void*)0)) {
7
←
Assuming 'line' is not equal to null
→
8
←
Taking false branch
→
15
←
Assuming 'line' is not equal to null
→
16
←
Taking false branch
→
24
←
Assuming 'line' is not equal to null
→
25
←
Taking false branch
→
325 return NGX_ERROR-1;
326 }
327
328 p = line;
329
330 for (i = 0; i < log[l].format->ops->nelts; i++) {
9
←
Loop condition is false. Execution continues on line 334
→
17
←
Loop condition is false. Execution continues on line 334
→
26
←
Loop condition is false. Execution continues on line 334
→
331 p = op[i].run(r, p, &op[i]);
332 }
333
334 ngx_linefeed(p)*p++ = (u_char) 10;;
335
336 ngx_http_log_write(r, &log[l], line, p - line);
27
←
Calling 'ngx_http_log_write'
→
337 }
338
339 return NGX_OK0;
340}
341
342
343static void
344ngx_http_log_write(ngx_http_request_t *r, ngx_http_log_t *log, u_char *buf,
345 size_t len)
346{
347 u_char *name;
348 time_t now;
349 ssize_t n;
350 ngx_err_t err;
351#if (NGX_ZLIB1)
352 ngx_http_log_buf_t *buffer;
353#endif
354
355 if (log->script == NULL((void*)0)) {
28
←
Taking true branch
→
356 name = log->file->name.data;
29
←
Dereference of null pointer
357
358#if (NGX_ZLIB1)
359 buffer = log->file->data;
360
361 if (buffer && buffer->gzip) {
362 n = ngx_http_log_gzip(log->file->fd, buf, len, buffer->gzip,
363 r->connection->log);
364 } else {
365 n = ngx_write_fd(log->file->fd, buf, len);
366 }
367#else
368 n = ngx_write_fd(log->file->fd, buf, len);
369#endif
370
371 } else {
372 name = NULL((void*)0);
373 n = ngx_http_log_script_write(r, log->script, &name, buf, len);
374 }
375
376 if (n == (ssize_t) len) {
377 return;
378 }
379
380 now = ngx_time()ngx_cached_time->sec;
381
382 if (n == -1) {
383 err = ngx_errno(*__error());
384
385 if (err == NGX_ENOSPC28) {
386 log->disk_full_time = now;
387 }
388
389 if (now - log->error_log_time > 59) {
390 ngx_log_error(NGX_LOG_ALERT, r->connection->log, err,if ((r->connection->log)->log_level >= 2) ngx_log_error_core
(2, r->connection->log, err, "write()" " to \"%s\" failed"
, name)
391 ngx_write_fd_n " to \"%s\" failed", name)if ((r->connection->log)->log_level >= 2) ngx_log_error_core
(2, r->connection->log, err, "write()" " to \"%s\" failed"
, name);
392
393 log->error_log_time = now;
394 }
395
396 return;
397 }
398
399 if (now - log->error_log_time > 59) {
400 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,if ((r->connection->log)->log_level >= 2) ngx_log_error_core
(2, r->connection->log, 0, "write()" " to \"%s\" was incomplete: %z of %uz"
, name, n, len)
401 ngx_write_fd_n " to \"%s\" was incomplete: %z of %uz",if ((r->connection->log)->log_level >= 2) ngx_log_error_core
(2, r->connection->log, 0, "write()" " to \"%s\" was incomplete: %z of %uz"
, name, n, len)
402 name, n, len)if ((r->connection->log)->log_level >= 2) ngx_log_error_core
(2, r->connection->log, 0, "write()" " to \"%s\" was incomplete: %z of %uz"
, name, n, len);
403
404 log->error_log_time = now;
405 }
406}
407
408
409static ssize_t
410ngx_http_log_script_write(ngx_http_request_t *r, ngx_http_log_script_t *script,
411 u_char **name, u_char *buf, size_t len)
412{
413 size_t root;
414 ssize_t n;
415 ngx_str_t log, path;
416 ngx_open_file_info_t of;
417 ngx_http_log_loc_conf_t *llcf;
418 ngx_http_core_loc_conf_t *clcf;
419
420 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module)(r)->loc_conf[ngx_http_core_module.ctx_index];
421
422 if (!r->root_tested) {
423
424 /* test root directory existence */
425
426 if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL((void*)0)) {
427 /* simulate successful logging */
428 return len;
429 }
430
431 path.data[root] = '\0';
432
433 ngx_memzero(&of, sizeof(ngx_open_file_info_t))(void) ((__builtin_object_size (&of, 0) != (size_t) -1) ?
__builtin___memset_chk (&of, 0, sizeof(ngx_open_file_info_t
), __builtin_object_size (&of, 0)) : __inline_memset_chk (
&of, 0, sizeof(ngx_open_file_info_t)));
434
435 of.valid = clcf->open_file_cache_valid;
436 of.min_uses = clcf->open_file_cache_min_uses;
437 of.test_dir = 1;
438 of.test_only = 1;
439 of.errors = clcf->open_file_cache_errors;
440 of.events = clcf->open_file_cache_events;
441
442 if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK0) {
443 /* simulate successful logging */
444 return len;
445 }
446
447 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
448 != NGX_OK0)
449 {
450 if (of.err == 0) {
451 /* simulate successful logging */
452 return len;
453 }
454
455 ngx_log_error(NGX_LOG_ERR, r->connection->log, of.err,if ((r->connection->log)->log_level >= 4) ngx_log_error_core
(4, r->connection->log, of.err, "testing \"%s\" existence failed"
, path.data)
456 "testing \"%s\" existence failed", path.data)if ((r->connection->log)->log_level >= 4) ngx_log_error_core
(4, r->connection->log, of.err, "testing \"%s\" existence failed"
, path.data);
457
458 /* simulate successful logging */
459 return len;
460 }
461
462 if (!of.is_dir) {
463 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ENOTDIR,if ((r->connection->log)->log_level >= 4) ngx_log_error_core
(4, r->connection->log, 20, "testing \"%s\" existence failed"
, path.data)
464 "testing \"%s\" existence failed", path.data)if ((r->connection->log)->log_level >= 4) ngx_log_error_core
(4, r->connection->log, 20, "testing \"%s\" existence failed"
, path.data);
465
466 /* simulate successful logging */
467 return len;
468 }
469 }
470
471 if (ngx_http_script_run(r, &log, script->lengths->elts, 1,
472 script->values->elts)
473 == NULL((void*)0))
474 {
475 /* simulate successful logging */
476 return len;
477 }
478
479 log.data[log.len - 1] = '\0';
480 *name = log.data;
481
482 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
483 "http log \"%s\"", log.data);
484
485 llcf = ngx_http_get_module_loc_conf(r, ngx_http_log_module)(r)->loc_conf[ngx_http_log_module.ctx_index];
486
487 ngx_memzero(&of, sizeof(ngx_open_file_info_t))(void) ((__builtin_object_size (&of, 0) != (size_t) -1) ?
__builtin___memset_chk (&of, 0, sizeof(ngx_open_file_info_t
), __builtin_object_size (&of, 0)) : __inline_memset_chk (
&of, 0, sizeof(ngx_open_file_info_t)));
488
489 of.log = 1;
490 of.valid = llcf->open_file_cache_valid;
491 of.min_uses = llcf->open_file_cache_min_uses;
492 of.directio = NGX_OPEN_FILE_DIRECTIO_OFF9223372036854775807LL;
493
494 if (ngx_http_set_disable_symlinks(r, clcf, &log, &of) != NGX_OK0) {
495 /* simulate successful logging */
496 return len;
497 }
498
499 if (ngx_open_cached_file(llcf->open_file_cache, &log, &of, r->pool)
500 != NGX_OK0)
501 {
502 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,if ((r->connection->log)->log_level >= 3) ngx_log_error_core
(3, r->connection->log, (*__error()), "%s \"%s\" failed"
, of.failed, log.data)
503 "%s \"%s\" failed", of.failed, log.data)if ((r->connection->log)->log_level >= 3) ngx_log_error_core
(3, r->connection->log, (*__error()), "%s \"%s\" failed"
, of.failed, log.data);
504 /* simulate successful logging */
505 return len;
506 }
507
508 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
509 "http log #%d", of.fd);
510
511 n = ngx_write_fd(of.fd, buf, len);
512
513 return n;
514}
515
516
517#if (NGX_ZLIB1)
518
519static ssize_t
520ngx_http_log_gzip(ngx_fd_t fd, u_char *buf, size_t len, ngx_int_t level,
521 ngx_log_t *log)
522{
523 int rc, wbits, memlevel;
524 u_char *out;
525 size_t size;
526 ssize_t n;
527 z_stream zstream;
528 ngx_err_t err;
529 ngx_pool_t *pool;
530
531 wbits = MAX_WBITS15;
532 memlevel = MAX_MEM_LEVEL9 - 1;
533
534 while ((ssize_t) len < ((1 << (wbits - 1)) - 262)) {
535 wbits--;
536 memlevel--;
537 }
538
539 /*
540 * This is a formula from deflateBound() for conservative upper bound of
541 * compressed data plus 18 bytes of gzip wrapper.
542 */
543
544 size = len + ((len + 7) >> 3) + ((len + 63) >> 6) + 5 + 18;
545
546 ngx_memzero(&zstream, sizeof(z_stream))(void) ((__builtin_object_size (&zstream, 0) != (size_t) -
1) ? __builtin___memset_chk (&zstream, 0, sizeof(z_stream
), __builtin_object_size (&zstream, 0)) : __inline_memset_chk
(&zstream, 0, sizeof(z_stream)));
547
548 pool = ngx_create_pool(256, log);
549 if (pool == NULL((void*)0)) {
550 /* simulate successful logging */
551 return len;
552 }
553
554 pool->log = log;
555
556 zstream.zalloc = ngx_http_log_gzip_alloc;
557 zstream.zfree = ngx_http_log_gzip_free;
558 zstream.opaque = pool;
559
560 out = ngx_pnalloc(pool, size);
561 if (out == NULL((void*)0)) {
562 goto done;
563 }
564
565 zstream.next_in = buf;
566 zstream.avail_in = len;
567 zstream.next_out = out;
568 zstream.avail_out = size;
569
570 rc = deflateInit2(&zstream, (int) level, Z_DEFLATED, wbits + 16, memlevel,deflateInit2_((&zstream),((int) level),(8),(wbits + 16),(
memlevel), (0), "1.2.8", (int)sizeof(z_stream))
571 Z_DEFAULT_STRATEGY)deflateInit2_((&zstream),((int) level),(8),(wbits + 16),(
memlevel), (0), "1.2.8", (int)sizeof(z_stream));
572
573 if (rc != Z_OK0) {
574 ngx_log_error(NGX_LOG_ALERT, log, 0, "deflateInit2() failed: %d", rc)if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "deflateInit2() failed: %d", rc);
575 goto done;
576 }
577
578 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, log, 0,
579 "deflate in: ni:%p no:%p ai:%ud ao:%ud",
580 zstream.next_in, zstream.next_out,
581 zstream.avail_in, zstream.avail_out);
582
583 rc = deflate(&zstream, Z_FINISH4);
584
585 if (rc != Z_STREAM_END1) {
586 ngx_log_error(NGX_LOG_ALERT, log, 0,if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "deflate(Z_FINISH) failed: %d", rc)
587 "deflate(Z_FINISH) failed: %d", rc)if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "deflate(Z_FINISH) failed: %d", rc);
588 goto done;
589 }
590
591 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, log, 0,
592 "deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
593 zstream.next_in, zstream.next_out,
594 zstream.avail_in, zstream.avail_out,
595 rc);
596
597 size -= zstream.avail_out;
598
599 rc = deflateEnd(&zstream);
600
601 if (rc != Z_OK0) {
602 ngx_log_error(NGX_LOG_ALERT, log, 0, "deflateEnd() failed: %d", rc)if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "deflateEnd() failed: %d", rc);
603 goto done;
604 }
605
606 n = ngx_write_fd(fd, out, size);
607
608 if (n != (ssize_t) size) {
609 err = (n == -1) ? ngx_errno(*__error()) : 0;
610
611 ngx_destroy_pool(pool);
612
613 ngx_set_errno(err)(*__error()) = err;
614 return -1;
615 }
616
617done:
618
619 ngx_destroy_pool(pool);
620
621 /* simulate successful logging */
622 return len;
623}
624
625
626static void *
627ngx_http_log_gzip_alloc(void *opaque, u_int items, u_int size)
628{
629 ngx_pool_t *pool = opaque;
630
631 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pool->log, 0,
632 "gzip alloc: n:%ud s:%ud", items, size);
633
634 return ngx_palloc(pool, items * size);
635}
636
637
638static void
639ngx_http_log_gzip_free(void *opaque, void *address)
640{
641#if 0
642 ngx_pool_t *pool = opaque;
643
644 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pool->log, 0, "gzip free: %p", address);
645#endif
646}
647
648#endif
649
650
651static void
652ngx_http_log_flush(ngx_open_file_t *file, ngx_log_t *log)
653{
654 size_t len;
655 ssize_t n;
656 ngx_http_log_buf_t *buffer;
657
658 buffer = file->data;
659
660 len = buffer->pos - buffer->start;
661
662 if (len == 0) {
663 return;
664 }
665
666#if (NGX_ZLIB1)
667 if (buffer->gzip) {
668 n = ngx_http_log_gzip(file->fd, buffer->start, len, buffer->gzip, log);
669 } else {
670 n = ngx_write_fd(file->fd, buffer->start, len);
671 }
672#else
673 n = ngx_write_fd(file->fd, buffer->start, len);
674#endif
675
676 if (n == -1) {
677 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,if ((log)->log_level >= 2) ngx_log_error_core(2, log, (
*__error()), "write()" " to \"%s\" failed", file->name.data
)
678 ngx_write_fd_n " to \"%s\" failed",if ((log)->log_level >= 2) ngx_log_error_core(2, log, (
*__error()), "write()" " to \"%s\" failed", file->name.data
)
679 file->name.data)if ((log)->log_level >= 2) ngx_log_error_core(2, log, (
*__error()), "write()" " to \"%s\" failed", file->name.data
);
680
681 } else if ((size_t) n != len) {
682 ngx_log_error(NGX_LOG_ALERT, log, 0,if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "write()" " to \"%s\" was incomplete: %z of %uz", file->
name.data, n, len)
683 ngx_write_fd_n " to \"%s\" was incomplete: %z of %uz",if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "write()" " to \"%s\" was incomplete: %z of %uz", file->
name.data, n, len)
684 file->name.data, n, len)if ((log)->log_level >= 2) ngx_log_error_core(2, log, 0
, "write()" " to \"%s\" was incomplete: %z of %uz", file->
name.data, n, len);
685 }
686
687 buffer->pos = buffer->start;
688
689 if (buffer->event && buffer->event->timer_set) {
690 ngx_del_timerngx_event_del_timer(buffer->event);
691 }
692}
693
694
695static void
696ngx_http_log_flush_handler(ngx_event_t *ev)
697{
698 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0,
699 "http log buffer flush handler");
700
701 ngx_http_log_flush(ev->data, ev->log);
702}
703
704
705static u_char *
706ngx_http_log_copy_short(ngx_http_request_t *r, u_char *buf,
707 ngx_http_log_op_t *op)
708{
709 size_t len;
710 uintptr_t data;
711
712 len = op->len;
713 data = op->data;
714
715 while (len--) {
716 *buf++ = (u_char) (data & 0xff);
717 data >>= 8;
718 }
719
720 return buf;
721}
722
723
724static u_char *
725ngx_http_log_copy_long(ngx_http_request_t *r, u_char *buf,
726 ngx_http_log_op_t *op)
727{
728 return ngx_cpymem(buf, (u_char *) op->data, op->len)(((u_char *) ((__builtin_object_size (buf, 0) != (size_t) -1)
? __builtin___memcpy_chk (buf, (u_char *) op->data, op->
len, __builtin_object_size (buf, 0)) : __inline_memcpy_chk (buf
, (u_char *) op->data, op->len))) + (op->len));
729}
730
731
732static u_char *
733ngx_http_log_pipe(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
734{
735 if (r->pipeline) {
736 *buf = 'p';
737 } else {
738 *buf = '.';
739 }
740
741 return buf + 1;
742}
743
744
745static u_char *
746ngx_http_log_time(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
747{
748 return ngx_cpymem(buf, ngx_cached_http_log_time.data,(((u_char *) ((__builtin_object_size (buf, 0) != (size_t) -1)
? __builtin___memcpy_chk (buf, ngx_cached_http_log_time.data
, ngx_cached_http_log_time.len, __builtin_object_size (buf, 0
)) : __inline_memcpy_chk (buf, ngx_cached_http_log_time.data,
ngx_cached_http_log_time.len))) + (ngx_cached_http_log_time.
len))
749 ngx_cached_http_log_time.len)(((u_char *) ((__builtin_object_size (buf, 0) != (size_t) -1)
? __builtin___memcpy_chk (buf, ngx_cached_http_log_time.data
, ngx_cached_http_log_time.len, __builtin_object_size (buf, 0
)) : __inline_memcpy_chk (buf, ngx_cached_http_log_time.data,
ngx_cached_http_log_time.len))) + (ngx_cached_http_log_time.
len));
750}
751
752static u_char *
753ngx_http_log_iso8601(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
754{
755 return ngx_cpymem(buf, ngx_cached_http_log_iso8601.data,(((u_char *) ((__builtin_object_size (buf, 0) != (size_t) -1)
? __builtin___memcpy_chk (buf, ngx_cached_http_log_iso8601.data
, ngx_cached_http_log_iso8601.len, __builtin_object_size (buf
, 0)) : __inline_memcpy_chk (buf, ngx_cached_http_log_iso8601
.data, ngx_cached_http_log_iso8601.len))) + (ngx_cached_http_log_iso8601
.len))
756 ngx_cached_http_log_iso8601.len)(((u_char *) ((__builtin_object_size (buf, 0) != (size_t) -1)
? __builtin___memcpy_chk (buf, ngx_cached_http_log_iso8601.data
, ngx_cached_http_log_iso8601.len, __builtin_object_size (buf
, 0)) : __inline_memcpy_chk (buf, ngx_cached_http_log_iso8601
.data, ngx_cached_http_log_iso8601.len))) + (ngx_cached_http_log_iso8601
.len));
757}
758
759static u_char *
760ngx_http_log_msec(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
761{
762 ngx_time_t *tp;
763
764 tp = ngx_timeofday()(ngx_time_t *) ngx_cached_time;
765
766 return ngx_sprintf(buf, "%T.%03M", tp->sec, tp->msec);
767}
768
769
770static u_char *
771ngx_http_log_request_time(ngx_http_request_t *r, u_char *buf,
772 ngx_http_log_op_t *op)
773{
774 ngx_time_t *tp;
775 ngx_msec_int_t ms;
776
777 tp = ngx_timeofday()(ngx_time_t *) ngx_cached_time;
778
779 ms = (ngx_msec_int_t)
780 ((tp->sec - r->start_sec) * 1000 + (tp->msec - r->start_msec));
781 ms = ngx_max(ms, 0)((ms < 0) ? (0) : (ms));
782
783 return ngx_sprintf(buf, "%T.%03M", (time_t) ms / 1000, ms % 1000);
784}
785
786
787static u_char *
788ngx_http_log_status(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
789{
790 ngx_uint_t status;
791
792 if (r->err_status) {
793 status = r->err_status;
794
795 } else if (r->headers_out.status) {
796 status = r->headers_out.status;
797
798 } else if (r->http_version == NGX_HTTP_VERSION_99) {
799 status = 9;
800
801 } else {
802 status = 0;
803 }
804
805 return ngx_sprintf(buf, "%03ui", status);
806}
807
808
809static u_char *
810ngx_http_log_bytes_sent(ngx_http_request_t *r, u_char *buf,
811 ngx_http_log_op_t *op)
812{
813 return ngx_sprintf(buf, "%O", r->connection->sent);
814}
815
816
817/*
818 * although there is a real $body_bytes_sent variable,
819 * this log operation code function is more optimized for logging
820 */
821
822static u_char *
823ngx_http_log_body_bytes_sent(ngx_http_request_t *r, u_char *buf,
824 ngx_http_log_op_t *op)
825{
826 off_t length;
827
828 length = r->connection->sent - r->header_size;
829
830 if (length > 0) {
831 return ngx_sprintf(buf, "%O", length);
832 }
833
834 *buf = '0';
835
836 return buf + 1;
837}
838
839
840static u_char *
841ngx_http_log_request_length(ngx_http_request_t *r, u_char *buf,
842 ngx_http_log_op_t *op)
843{
844 return ngx_sprintf(buf, "%O", r->request_length);
845}
846
847
848static ngx_int_t
849ngx_http_log_variable_compile(ngx_conf_t *cf, ngx_http_log_op_t *op,
850 ngx_str_t *value)
851{
852 ngx_int_t index;
853
854 index = ngx_http_get_variable_index(cf, value);
855 if (index == NGX_ERROR-1) {
856 return NGX_ERROR-1;
857 }
858
859 op->len = 0;
860 op->getlen = ngx_http_log_variable_getlen;
861 op->run = ngx_http_log_variable;
862 op->data = index;
863
864 return NGX_OK0;
865}
866
867
868static size_t
869ngx_http_log_variable_getlen(ngx_http_request_t *r, uintptr_t data)
870{
871 uintptr_t len;
872 ngx_http_variable_value_t *value;
873
874 value = ngx_http_get_indexed_variable(r, data);
875
876 if (value == NULL((void*)0) || value->not_found) {
877 return 1;
878 }
879
880 len = ngx_http_log_escape(NULL((void*)0), value->data, value->len);
881
882 value->escape = len ? 1 : 0;
883
884 return value->len + len * 3;
885}
886
887
888static u_char *
889ngx_http_log_variable(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
890{
891 ngx_http_variable_value_t *value;
892
893 value = ngx_http_get_indexed_variable(r, op->data);
894
895 if (value == NULL((void*)0) || value->not_found) {
896 *buf = '-';
897 return buf + 1;
898 }
899
900 if (value->escape == 0) {
901 return ngx_cpymem(buf, value->data, value->len)(((u_char *) ((__builtin_object_size (buf, 0) != (size_t) -1)
? __builtin___memcpy_chk (buf, value->data, value->len
, __builtin_object_size (buf, 0)) : __inline_memcpy_chk (buf,
value->data, value->len))) + (value->len));
902
903 } else {
904 return (u_char *) ngx_http_log_escape(buf, value->data, value->len);
905 }
906}
907
908
909static uintptr_t
910ngx_http_log_escape(u_char *dst, u_char *src, size_t size)
911{
912 ngx_uint_t n;
913 static u_char hex[] = "0123456789ABCDEF";
914
915 static uint32_t escape[] = {
916 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
917
918 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
919 0x00000004, /* 0000 0000 0000 0000 0000 0000 0000 0100 */
920
921 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
922 0x10000000, /* 0001 0000 0000 0000 0000 0000 0000 0000 */
923
924 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
925 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
926
927 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
928 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
929 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
930 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
931 };
932
933
934 if (dst == NULL((void*)0)) {
935
936 /* find the number of the characters to be escaped */
937
938 n = 0;
939
940 while (size) {
941 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
942 n++;
943 }
944 src++;
945 size--;
946 }
947
948 return (uintptr_t) n;
949 }
950
951 while (size) {
952 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
953 *dst++ = '\\';
954 *dst++ = 'x';
955 *dst++ = hex[*src >> 4];
956 *dst++ = hex[*src & 0xf];
957 src++;
958
959 } else {
960 *dst++ = *src++;
961 }
962 size--;
963 }
964
965 return (uintptr_t) dst;
966}
967
968
969static void *
970ngx_http_log_create_main_conf(ngx_conf_t *cf)
971{
972 ngx_http_log_main_conf_t *conf;
973
974 ngx_http_log_fmt_t *fmt;
975
976 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_main_conf_t));
977 if (conf == NULL((void*)0)) {
978 return NULL((void*)0);
979 }
980
981 if (ngx_array_init(&conf->formats, cf->pool, 4, sizeof(ngx_http_log_fmt_t))
982 != NGX_OK0)
983 {
984 return NULL((void*)0);
985 }
986
987 fmt = ngx_array_push(&conf->formats);
988 if (fmt == NULL((void*)0)) {
989 return NULL((void*)0);
990 }
991
992 ngx_str_set(&fmt->name, "combined")(&fmt->name)->len = sizeof("combined") - 1; (&fmt
->name)->data = (u_char *) "combined";
993
994 fmt->flushes = NULL((void*)0);
995
996 fmt->ops = ngx_array_create(cf->pool, 16, sizeof(ngx_http_log_op_t));
997 if (fmt->ops == NULL((void*)0)) {
998 return NULL((void*)0);
999 }
1000
1001 return conf;
1002}
1003
1004
1005static void *
1006ngx_http_log_create_loc_conf(ngx_conf_t *cf)
1007{
1008 ngx_http_log_loc_conf_t *conf;
1009
1010 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_loc_conf_t));
1011 if (conf == NULL((void*)0)) {
1012 return NULL((void*)0);
1013 }
1014
1015 conf->open_file_cache = NGX_CONF_UNSET_PTR(void *) -1;
1016
1017 return conf;
1018}
1019
1020
1021static char *
1022ngx_http_log_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
1023{
1024 ngx_http_log_loc_conf_t *prev = parent;
1025 ngx_http_log_loc_conf_t *conf = child;
1026
1027 ngx_http_log_t *log;
1028 ngx_http_log_fmt_t *fmt;
1029 ngx_http_log_main_conf_t *lmcf;
1030
1031 if (conf->open_file_cache == NGX_CONF_UNSET_PTR(void *) -1) {
1032
1033 conf->open_file_cache = prev->open_file_cache;
1034 conf->open_file_cache_valid = prev->open_file_cache_valid;
1035 conf->open_file_cache_min_uses = prev->open_file_cache_min_uses;
1036
1037 if (conf->open_file_cache == NGX_CONF_UNSET_PTR(void *) -1) {
1038 conf->open_file_cache = NULL((void*)0);
1039 }
1040 }
1041
1042 if (conf->logs || conf->off) {
1043 return NGX_CONF_OK((void*)0);
1044 }
1045
1046 conf->logs = prev->logs;
1047 conf->off = prev->off;
1048
1049 if (conf->logs || conf->off) {
1050 return NGX_CONF_OK((void*)0);
1051 }
1052
1053 conf->logs = ngx_array_create(cf->pool, 2, sizeof(ngx_http_log_t));
1054 if (conf->logs == NULL((void*)0)) {
1055 return NGX_CONF_ERROR(void *) -1;
1056 }
1057
1058 log = ngx_array_push(conf->logs);
1059 if (log == NULL((void*)0)) {
1060 return NGX_CONF_ERROR(void *) -1;
1061 }
1062
1063 log->file = ngx_conf_open_file(cf->cycle, &ngx_http_access_log);
1064 if (log->file == NULL((void*)0)) {
1065 return NGX_CONF_ERROR(void *) -1;
1066 }
1067
1068 log->script = NULL((void*)0);
1069 log->disk_full_time = 0;
1070 log->error_log_time = 0;
1071
1072 lmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_log_module)((ngx_http_conf_ctx_t *) cf->ctx)->main_conf[ngx_http_log_module
.ctx_index];
1073 fmt = lmcf->formats.elts;
1074
1075 /* the default "combined" format */
1076 log->format = &fmt[0];
1077 lmcf->combined_used = 1;
1078
1079 return NGX_CONF_OK((void*)0);
1080}
1081
1082
1083static char *
1084ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1085{
1086 ngx_http_log_loc_conf_t *llcf = conf;
1087
1088 ssize_t size;
1089 ngx_int_t gzip;
1090 ngx_uint_t i, n;
1091 ngx_msec_t flush;
1092 ngx_str_t *value, name, s;
1093 ngx_http_log_t *log;
1094 ngx_http_log_buf_t *buffer;
1095 ngx_http_log_fmt_t *fmt;
1096 ngx_http_log_main_conf_t *lmcf;
1097 ngx_http_script_compile_t sc;
1098
1099 value = cf->args->elts;
1100
1101 if (ngx_strcmp(value[1].data, "off")strcmp((const char *) value[1].data, (const char *) "off") == 0) {
1102 llcf->off = 1;
1103 if (cf->args->nelts == 2) {
1104 return NGX_CONF_OK((void*)0);
1105 }
1106
1107 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1108 "invalid parameter \"%V\"", &value[2]);
1109 return NGX_CONF_ERROR(void *) -1;
1110 }
1111
1112 if (llcf->logs == NULL((void*)0)) {
1113 llcf->logs = ngx_array_create(cf->pool, 2, sizeof(ngx_http_log_t));
1114 if (llcf->logs == NULL((void*)0)) {
1115 return NGX_CONF_ERROR(void *) -1;
1116 }
1117 }
1118
1119 lmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_log_module)((ngx_http_conf_ctx_t *) cf->ctx)->main_conf[ngx_http_log_module
.ctx_index];
1120
1121 log = ngx_array_push(llcf->logs);
1122 if (log == NULL((void*)0)) {
1123 return NGX_CONF_ERROR(void *) -1;
1124 }
1125
1126 ngx_memzero(log, sizeof(ngx_http_log_t))(void) ((__builtin_object_size (log, 0) != (size_t) -1) ? __builtin___memset_chk
(log, 0, sizeof(ngx_http_log_t), __builtin_object_size (log,
0)) : __inline_memset_chk (log, 0, sizeof(ngx_http_log_t)));
1127
1128 n = ngx_http_script_variables_count(&value[1]);
1129
1130 if (n == 0) {
1131 log->file = ngx_conf_open_file(cf->cycle, &value[1]);
1132 if (log->file == NULL((void*)0)) {
1133 return NGX_CONF_ERROR(void *) -1;
1134 }
1135
1136 } else {
1137 if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK0) {
1138 return NGX_CONF_ERROR(void *) -1;
1139 }
1140
1141 log->script = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_script_t));
1142 if (log->script == NULL((void*)0)) {
1143 return NGX_CONF_ERROR(void *) -1;
1144 }
1145
1146 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t))(void) ((__builtin_object_size (&sc, 0) != (size_t) -1) ?
__builtin___memset_chk (&sc, 0, sizeof(ngx_http_script_compile_t
), __builtin_object_size (&sc, 0)) : __inline_memset_chk (
&sc, 0, sizeof(ngx_http_script_compile_t)));
1147
1148 sc.cf = cf;
1149 sc.source = &value[1];
1150 sc.lengths = &log->script->lengths;
1151 sc.values = &log->script->values;
1152 sc.variables = n;
1153 sc.complete_lengths = 1;
1154 sc.complete_values = 1;
1155
1156 if (ngx_http_script_compile(&sc) != NGX_OK0) {
1157 return NGX_CONF_ERROR(void *) -1;
1158 }
1159 }
1160
1161 if (cf->args->nelts >= 3) {
1162 name = value[2];
1163
1164 if (ngx_strcmp(name.data, "combined")strcmp((const char *) name.data, (const char *) "combined") == 0) {
1165 lmcf->combined_used = 1;
1166 }
1167
1168 } else {
1169 ngx_str_set(&name, "combined")(&name)->len = sizeof("combined") - 1; (&name)->
data = (u_char *) "combined";
1170 lmcf->combined_used = 1;
1171 }
1172
1173 fmt = lmcf->formats.elts;
1174 for (i = 0; i < lmcf->formats.nelts; i++) {
1175 if (fmt[i].name.len == name.len
1176 && ngx_strcasecmp(fmt[i].name.data, name.data) == 0)
1177 {
1178 log->format = &fmt[i];
1179 break;
1180 }
1181 }
1182
1183 if (log->format == NULL((void*)0)) {
1184 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1185 "unknown log format \"%V\"", &name);
1186 return NGX_CONF_ERROR(void *) -1;
1187 }
1188
1189 size = 0;
1190 flush = 0;
1191 gzip = 0;
1192
1193 for (i = 3; i < cf->args->nelts; i++) {
1194
1195 if (ngx_strncmp(value[i].data, "buffer=", 7)strncmp((const char *) value[i].data, (const char *) "buffer="
, 7) == 0) {
1196 s.len = value[i].len - 7;
1197 s.data = value[i].data + 7;
1198
1199 size = ngx_parse_size(&s);
1200
1201 if (size == NGX_ERROR-1 || size == 0) {
1202 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1203 "invalid buffer size \"%V\"", &s);
1204 return NGX_CONF_ERROR(void *) -1;
1205 }
1206
1207 continue;
1208 }
1209
1210 if (ngx_strncmp(value[i].data, "flush=", 6)strncmp((const char *) value[i].data, (const char *) "flush="
, 6) == 0) {
1211 s.len = value[i].len - 6;
1212 s.data = value[i].data + 6;
1213
1214 flush = ngx_parse_time(&s, 0);
1215
1216 if (flush == (ngx_msec_t) NGX_ERROR-1 || flush == 0) {
1217 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1218 "invalid flush time \"%V\"", &s);
1219 return NGX_CONF_ERROR(void *) -1;
1220 }
1221
1222 continue;
1223 }
1224
1225 if (ngx_strncmp(value[i].data, "gzip", 4)strncmp((const char *) value[i].data, (const char *) "gzip", 4
) == 0
1226 && (value[i].len == 4 || value[i].data[4] == '='))
1227 {
1228#if (NGX_ZLIB1)
1229 if (size == 0) {
1230 size = 64 * 1024;
1231 }
1232
1233 if (value[i].len == 4) {
1234 gzip = Z_BEST_SPEED1;
1235 continue;
1236 }
1237
1238 s.len = value[i].len - 5;
1239 s.data = value[i].data + 5;
1240
1241 gzip = ngx_atoi(s.data, s.len);
1242
1243 if (gzip < 1 || gzip > 9) {
1244 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1245 "invalid compression level \"%V\"", &s);
1246 return NGX_CONF_ERROR(void *) -1;
1247 }
1248
1249 continue;
1250
1251#else
1252 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1253 "nginx was built without zlib support");
1254 return NGX_CONF_ERROR(void *) -1;
1255#endif
1256 }
1257
1258 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1259 "invalid parameter \"%V\"", &value[i]);
1260 return NGX_CONF_ERROR(void *) -1;
1261 }
1262
1263 if (flush && size == 0) {
1264 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1265 "no buffer is defined for access_log \"%V\"",
1266 &value[1]);
1267 return NGX_CONF_ERROR(void *) -1;
1268 }
1269
1270 if (size) {
1271
1272 if (log->script) {
1273 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1274 "buffered logs cannot have variables in name");
1275 return NGX_CONF_ERROR(void *) -1;
1276 }
1277
1278 if (log->file->data) {
1279 buffer = log->file->data;
1280
1281 if (buffer->last - buffer->start != size
1282 || buffer->flush != flush
1283 || buffer->gzip != gzip)
1284 {
1285 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1286 "access_log \"%V\" already defined "
1287 "with conflicting parameters",
1288 &value[1]);
1289 return NGX_CONF_ERROR(void *) -1;
1290 }
1291
1292 return NGX_CONF_OK((void*)0);
1293 }
1294
1295 buffer = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_buf_t));
1296 if (buffer == NULL((void*)0)) {
1297 return NGX_CONF_ERROR(void *) -1;
1298 }
1299
1300 buffer->start = ngx_pnalloc(cf->pool, size);
1301 if (buffer->start == NULL((void*)0)) {
1302 return NGX_CONF_ERROR(void *) -1;
1303 }
1304
1305 buffer->pos = buffer->start;
1306 buffer->last = buffer->start + size;
1307
1308 if (flush) {
1309 buffer->event = ngx_pcalloc(cf->pool, sizeof(ngx_event_t));
1310 if (buffer->event == NULL((void*)0)) {
1311 return NGX_CONF_ERROR(void *) -1;
1312 }
1313
1314 buffer->event->data = log->file;
1315 buffer->event->handler = ngx_http_log_flush_handler;
1316 buffer->event->log = &cf->cycle->new_log;
1317
1318 buffer->flush = flush;
1319 }
1320
1321 buffer->gzip = gzip;
1322
1323 log->file->flush = ngx_http_log_flush;
1324 log->file->data = buffer;
1325 }
1326
1327 return NGX_CONF_OK((void*)0);
1328}
1329
1330
1331static char *
1332ngx_http_log_set_format(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1333{
1334 ngx_http_log_main_conf_t *lmcf = conf;
1335
1336 ngx_str_t *value;
1337 ngx_uint_t i;
1338 ngx_http_log_fmt_t *fmt;
1339
1340 if (cf->cmd_type != NGX_HTTP_MAIN_CONF0x02000000) {
1341 ngx_conf_log_error(NGX_LOG_WARN5, cf, 0,
1342 "the \"log_format\" directive may be used "
1343 "only on \"http\" level");
1344 }
1345
1346 value = cf->args->elts;
1347
1348 fmt = lmcf->formats.elts;
1349 for (i = 0; i < lmcf->formats.nelts; i++) {
1350 if (fmt[i].name.len == value[1].len
1351 && ngx_strcmp(fmt[i].name.data, value[1].data)strcmp((const char *) fmt[i].name.data, (const char *) value[
1].data) == 0)
1352 {
1353 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1354 "duplicate \"log_format\" name \"%V\"",
1355 &value[1]);
1356 return NGX_CONF_ERROR(void *) -1;
1357 }
1358 }
1359
1360 fmt = ngx_array_push(&lmcf->formats);
1361 if (fmt == NULL((void*)0)) {
1362 return NGX_CONF_ERROR(void *) -1;
1363 }
1364
1365 fmt->name = value[1];
1366
1367 fmt->flushes = ngx_array_create(cf->pool, 4, sizeof(ngx_int_t));
1368 if (fmt->flushes == NULL((void*)0)) {
1369 return NGX_CONF_ERROR(void *) -1;
1370 }
1371
1372 fmt->ops = ngx_array_create(cf->pool, 16, sizeof(ngx_http_log_op_t));
1373 if (fmt->ops == NULL((void*)0)) {
1374 return NGX_CONF_ERROR(void *) -1;
1375 }
1376
1377 return ngx_http_log_compile_format(cf, fmt->flushes, fmt->ops, cf->args, 2);
1378}
1379
1380
1381static char *
1382ngx_http_log_compile_format(ngx_conf_t *cf, ngx_array_t *flushes,
1383 ngx_array_t *ops, ngx_array_t *args, ngx_uint_t s)
1384{
1385 u_char *data, *p, ch;
1386 size_t i, len;
1387 ngx_str_t *value, var;
1388 ngx_int_t *flush;
1389 ngx_uint_t bracket;
1390 ngx_http_log_op_t *op;
1391 ngx_http_log_var_t *v;
1392
1393 value = args->elts;
1394
1395 for ( /* void */ ; s < args->nelts; s++) {
1396
1397 i = 0;
1398
1399 while (i < value[s].len) {
1400
1401 op = ngx_array_push(ops);
1402 if (op == NULL((void*)0)) {
1403 return NGX_CONF_ERROR(void *) -1;
1404 }
1405
1406 data = &value[s].data[i];
1407
1408 if (value[s].data[i] == '$') {
1409
1410 if (++i == value[s].len) {
1411 goto invalid;
1412 }
1413
1414 if (value[s].data[i] == '{') {
1415 bracket = 1;
1416
1417 if (++i == value[s].len) {
1418 goto invalid;
1419 }
1420
1421 var.data = &value[s].data[i];
1422
1423 } else {
1424 bracket = 0;
1425 var.data = &value[s].data[i];
1426 }
1427
1428 for (var.len = 0; i < value[s].len; i++, var.len++) {
1429 ch = value[s].data[i];
1430
1431 if (ch == '}' && bracket) {
1432 i++;
1433 bracket = 0;
1434 break;
1435 }
1436
1437 if ((ch >= 'A' && ch <= 'Z')
1438 || (ch >= 'a' && ch <= 'z')
1439 || (ch >= '0' && ch <= '9')
1440 || ch == '_')
1441 {
1442 continue;
1443 }
1444
1445 break;
1446 }
1447
1448 if (bracket) {
1449 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1450 "the closing bracket in \"%V\" "
1451 "variable is missing", &var);
1452 return NGX_CONF_ERROR(void *) -1;
1453 }
1454
1455 if (var.len == 0) {
1456 goto invalid;
1457 }
1458
1459 for (v = ngx_http_log_vars; v->name.len; v++) {
1460
1461 if (v->name.len == var.len
1462 && ngx_strncmp(v->name.data, var.data, var.len)strncmp((const char *) v->name.data, (const char *) var.data
, var.len) == 0)
1463 {
1464 op->len = v->len;
1465 op->getlen = NULL((void*)0);
1466 op->run = v->run;
1467 op->data = 0;
1468
1469 goto found;
1470 }
1471 }
1472
1473 if (ngx_http_log_variable_compile(cf, op, &var) != NGX_OK0) {
1474 return NGX_CONF_ERROR(void *) -1;
1475 }
1476
1477 if (flushes) {
1478
1479 flush = ngx_array_push(flushes);
1480 if (flush == NULL((void*)0)) {
1481 return NGX_CONF_ERROR(void *) -1;
1482 }
1483
1484 *flush = op->data; /* variable index */
1485 }
1486
1487 found:
1488
1489 continue;
1490 }
1491
1492 i++;
1493
1494 while (i < value[s].len && value[s].data[i] != '$') {
1495 i++;
1496 }
1497
1498 len = &value[s].data[i] - data;
1499
1500 if (len) {
1501
1502 op->len = len;
1503 op->getlen = NULL((void*)0);
1504
1505 if (len <= sizeof(uintptr_t)) {
1506 op->run = ngx_http_log_copy_short;
1507 op->data = 0;
1508
1509 while (len--) {
1510 op->data <<= 8;
1511 op->data |= data[len];
1512 }
1513
1514 } else {
1515 op->run = ngx_http_log_copy_long;
1516
1517 p = ngx_pnalloc(cf->pool, len);
1518 if (p == NULL((void*)0)) {
1519 return NGX_CONF_ERROR(void *) -1;
1520 }
1521
1522 ngx_memcpy(p, data, len)(void) ((__builtin_object_size (p, 0) != (size_t) -1) ? __builtin___memcpy_chk
(p, data, len, __builtin_object_size (p, 0)) : __inline_memcpy_chk
(p, data, len));
1523 op->data = (uintptr_t) p;
1524 }
1525 }
1526 }
1527 }
1528
1529 return NGX_CONF_OK((void*)0);
1530
1531invalid:
1532
1533 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0, "invalid parameter \"%s\"", data);
1534
1535 return NGX_CONF_ERROR(void *) -1;
1536}
1537
1538
1539static char *
1540ngx_http_log_open_file_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1541{
1542 ngx_http_log_loc_conf_t *llcf = conf;
1543
1544 time_t inactive, valid;
1545 ngx_str_t *value, s;
1546 ngx_int_t max, min_uses;
1547 ngx_uint_t i;
1548
1549 if (llcf->open_file_cache != NGX_CONF_UNSET_PTR(void *) -1) {
1550 return "is duplicate";
1551 }
1552
1553 value = cf->args->elts;
1554
1555 max = 0;
1556 inactive = 10;
1557 valid = 60;
1558 min_uses = 1;
1559
1560 for (i = 1; i < cf->args->nelts; i++) {
1561
1562 if (ngx_strncmp(value[i].data, "max=", 4)strncmp((const char *) value[i].data, (const char *) "max=", 4
) == 0) {
1563
1564 max = ngx_atoi(value[i].data + 4, value[i].len - 4);
1565 if (max == NGX_ERROR-1) {
1566 goto failed;
1567 }
1568
1569 continue;
1570 }
1571
1572 if (ngx_strncmp(value[i].data, "inactive=", 9)strncmp((const char *) value[i].data, (const char *) "inactive="
, 9) == 0) {
1573
1574 s.len = value[i].len - 9;
1575 s.data = value[i].data + 9;
1576
1577 inactive = ngx_parse_time(&s, 1);
1578 if (inactive == (time_t) NGX_ERROR-1) {
1579 goto failed;
1580 }
1581
1582 continue;
1583 }
1584
1585 if (ngx_strncmp(value[i].data, "min_uses=", 9)strncmp((const char *) value[i].data, (const char *) "min_uses="
, 9) == 0) {
1586
1587 min_uses = ngx_atoi(value[i].data + 9, value[i].len - 9);
1588 if (min_uses == NGX_ERROR-1) {
1589 goto failed;
1590 }
1591
1592 continue;
1593 }
1594
1595 if (ngx_strncmp(value[i].data, "valid=", 6)strncmp((const char *) value[i].data, (const char *) "valid="
, 6) == 0) {
1596
1597 s.len = value[i].len - 6;
1598 s.data = value[i].data + 6;
1599
1600 valid = ngx_parse_time(&s, 1);
1601 if (valid == (time_t) NGX_ERROR-1) {
1602 goto failed;
1603 }
1604
1605 continue;
1606 }
1607
1608 if (ngx_strcmp(value[i].data, "off")strcmp((const char *) value[i].data, (const char *) "off") == 0) {
1609
1610 llcf->open_file_cache = NULL((void*)0);
1611
1612 continue;
1613 }
1614
1615 failed:
1616
1617 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1618 "invalid \"open_log_file_cache\" parameter \"%V\"",
1619 &value[i]);
1620 return NGX_CONF_ERROR(void *) -1;
1621 }
1622
1623 if (llcf->open_file_cache == NULL((void*)0)) {
1624 return NGX_CONF_OK((void*)0);
1625 }
1626
1627 if (max == 0) {
1628 ngx_conf_log_error(NGX_LOG_EMERG1, cf, 0,
1629 "\"open_log_file_cache\" must have \"max\" parameter");
1630 return NGX_CONF_ERROR(void *) -1;
1631 }
1632
1633 llcf->open_file_cache = ngx_open_file_cache_init(cf->pool, max, inactive);
1634
1635 if (llcf->open_file_cache) {
1636
1637 llcf->open_file_cache_valid = valid;
1638 llcf->open_file_cache_min_uses = min_uses;
1639
1640 return NGX_CONF_OK((void*)0);
1641 }
1642
1643 return NGX_CONF_ERROR(void *) -1;
1644}
1645
1646
1647static ngx_int_t
1648ngx_http_log_init(ngx_conf_t *cf)
1649{
1650 ngx_str_t *value;
1651 ngx_array_t a;
1652 ngx_http_handler_pt *h;
1653 ngx_http_log_fmt_t *fmt;
1654 ngx_http_log_main_conf_t *lmcf;
1655 ngx_http_core_main_conf_t *cmcf;
1656
1657 lmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_log_module)((ngx_http_conf_ctx_t *) cf->ctx)->main_conf[ngx_http_log_module
.ctx_index];
1658
1659 if (lmcf->combined_used) {
1660 if (ngx_array_init(&a, cf->pool, 1, sizeof(ngx_str_t)) != NGX_OK0) {
1661 return NGX_ERROR-1;
1662 }
1663
1664 value = ngx_array_push(&a);
1665 if (value == NULL((void*)0)) {
1666 return NGX_ERROR-1;
1667 }
1668
1669 *value = ngx_http_combined_fmt;
1670 fmt = lmcf->formats.elts;
1671
1672 if (ngx_http_log_compile_format(cf, NULL((void*)0), fmt->ops, &a, 0)
1673 != NGX_CONF_OK((void*)0))
1674 {
1675 return NGX_ERROR-1;
1676 }
1677 }
1678
1679 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module)((ngx_http_conf_ctx_t *) cf->ctx)->main_conf[ngx_http_core_module
.ctx_index];
1680
1681 h = ngx_array_push(&cmcf->phases[NGX_HTTP_LOG_PHASE].handlers);
1682 if (h == NULL((void*)0)) {
1683 return NGX_ERROR-1;
1684 }
1685
1686 *h = ngx_http_log_handler;
1687
1688 return NGX_OK0;
1689}