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ngx_stream_log_module.c
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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
#if (NGX_ZLIB)
#include <zlib.h>
#endif
typedef struct ngx_stream_log_op_s ngx_stream_log_op_t;
typedef u_char *(*ngx_stream_log_op_run_pt) (ngx_stream_session_t *s,
u_char *buf, ngx_stream_log_op_t *op);
typedef size_t (*ngx_stream_log_op_getlen_pt) (ngx_stream_session_t *s,
uintptr_t data);
struct ngx_stream_log_op_s {
size_t len;
ngx_stream_log_op_getlen_pt getlen;
ngx_stream_log_op_run_pt run;
uintptr_t data;
};
typedef struct {
ngx_str_t name;
ngx_array_t *flushes;
ngx_array_t *ops; /* array of ngx_stream_log_op_t */
} ngx_stream_log_fmt_t;
typedef struct {
ngx_array_t formats; /* array of ngx_stream_log_fmt_t */
} ngx_stream_log_main_conf_t;
typedef struct {
u_char *start;
u_char *pos;
u_char *last;
ngx_event_t *event;
ngx_msec_t flush;
ngx_int_t gzip;
} ngx_stream_log_buf_t;
typedef struct {
ngx_array_t *lengths;
ngx_array_t *values;
} ngx_stream_log_script_t;
typedef struct {
ngx_open_file_t *file;
ngx_stream_log_script_t *script;
time_t disk_full_time;
time_t error_log_time;
ngx_syslog_peer_t *syslog_peer;
ngx_stream_log_fmt_t *format;
ngx_stream_complex_value_t *filter;
} ngx_stream_log_t;
typedef struct {
ngx_array_t *logs; /* array of ngx_stream_log_t */
ngx_open_file_cache_t *open_file_cache;
time_t open_file_cache_valid;
ngx_uint_t open_file_cache_min_uses;
ngx_uint_t off; /* unsigned off:1 */
} ngx_stream_log_srv_conf_t;
typedef struct {
ngx_str_t name;
size_t len;
ngx_stream_log_op_run_pt run;
} ngx_stream_log_var_t;
#define NGX_STREAM_LOG_ESCAPE_DEFAULT 0
#define NGX_STREAM_LOG_ESCAPE_JSON 1
#define NGX_STREAM_LOG_ESCAPE_NONE 2
static void ngx_stream_log_write(ngx_stream_session_t *s, ngx_stream_log_t *log,
u_char *buf, size_t len);
static ssize_t ngx_stream_log_script_write(ngx_stream_session_t *s,
ngx_stream_log_script_t *script, u_char **name, u_char *buf, size_t len);
#if (NGX_ZLIB)
static ssize_t ngx_stream_log_gzip(ngx_fd_t fd, u_char *buf, size_t len,
ngx_int_t level, ngx_log_t *log);
static void *ngx_stream_log_gzip_alloc(void *opaque, u_int items, u_int size);
static void ngx_stream_log_gzip_free(void *opaque, void *address);
#endif
static void ngx_stream_log_flush(ngx_open_file_t *file, ngx_log_t *log);
static void ngx_stream_log_flush_handler(ngx_event_t *ev);
static ngx_int_t ngx_stream_log_variable_compile(ngx_conf_t *cf,
ngx_stream_log_op_t *op, ngx_str_t *value, ngx_uint_t escape);
static size_t ngx_stream_log_variable_getlen(ngx_stream_session_t *s,
uintptr_t data);
static u_char *ngx_stream_log_variable(ngx_stream_session_t *s, u_char *buf,
ngx_stream_log_op_t *op);
static uintptr_t ngx_stream_log_escape(u_char *dst, u_char *src, size_t size);
static size_t ngx_stream_log_json_variable_getlen(ngx_stream_session_t *s,
uintptr_t data);
static u_char *ngx_stream_log_json_variable(ngx_stream_session_t *s,
u_char *buf, ngx_stream_log_op_t *op);
static size_t ngx_stream_log_unescaped_variable_getlen(ngx_stream_session_t *s,
uintptr_t data);
static u_char *ngx_stream_log_unescaped_variable(ngx_stream_session_t *s,
u_char *buf, ngx_stream_log_op_t *op);
static void *ngx_stream_log_create_main_conf(ngx_conf_t *cf);
static void *ngx_stream_log_create_srv_conf(ngx_conf_t *cf);
static char *ngx_stream_log_merge_srv_conf(ngx_conf_t *cf, void *parent,
void *child);
static char *ngx_stream_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_log_set_format(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_log_compile_format(ngx_conf_t *cf,
ngx_array_t *flushes, ngx_array_t *ops, ngx_array_t *args, ngx_uint_t s);
static char *ngx_stream_log_open_file_cache(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_int_t ngx_stream_log_init(ngx_conf_t *cf);
static ngx_command_t ngx_stream_log_commands[] = {
{ ngx_string("log_format"),
NGX_STREAM_MAIN_CONF|NGX_CONF_2MORE,
ngx_stream_log_set_format,
NGX_STREAM_MAIN_CONF_OFFSET,
0,
NULL },
{ ngx_string("access_log"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE,
ngx_stream_log_set_log,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("open_log_file_cache"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1234,
ngx_stream_log_open_file_cache,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_log_module_ctx = {
NULL, /* preconfiguration */
ngx_stream_log_init, /* postconfiguration */
ngx_stream_log_create_main_conf, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_log_create_srv_conf, /* create server configuration */
ngx_stream_log_merge_srv_conf /* merge server configuration */
};
ngx_module_t ngx_stream_log_module = {
NGX_MODULE_V1,
&ngx_stream_log_module_ctx, /* module context */
ngx_stream_log_commands, /* module directives */
NGX_STREAM_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_int_t
ngx_stream_log_handler(ngx_stream_session_t *s)
{
u_char *line, *p;
size_t len, size;
ssize_t n;
ngx_str_t val;
ngx_uint_t i, l;
ngx_stream_log_t *log;
ngx_stream_log_op_t *op;
ngx_stream_log_buf_t *buffer;
ngx_stream_log_srv_conf_t *lscf;
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream log handler");
lscf = ngx_stream_get_module_srv_conf(s, ngx_stream_log_module);
if (lscf->off || lscf->logs == NULL) {
return NGX_OK;
}
log = lscf->logs->elts;
for (l = 0; l < lscf->logs->nelts; l++) {
if (log[l].filter) {
if (ngx_stream_complex_value(s, log[l].filter, &val) != NGX_OK) {
return NGX_ERROR;
}
if (val.len == 0 || (val.len == 1 && val.data[0] == '0')) {
continue;
}
}
if (ngx_time() == log[l].disk_full_time) {
/*
* on FreeBSD writing to a full filesystem with enabled softupdates
* may block process for much longer time than writing to non-full
* filesystem, so we skip writing to a log for one second
*/
continue;
}
ngx_stream_script_flush_no_cacheable_variables(s,
log[l].format->flushes);
len = 0;
op = log[l].format->ops->elts;
for (i = 0; i < log[l].format->ops->nelts; i++) {
if (op[i].len == 0) {
len += op[i].getlen(s, op[i].data);
} else {
len += op[i].len;
}
}
if (log[l].syslog_peer) {
/* length of syslog's PRI and HEADER message parts */
len += sizeof("<255>Jan 01 00:00:00 ") - 1
+ ngx_cycle->hostname.len + 1
+ log[l].syslog_peer->tag.len + 2;
goto alloc_line;
}
len += NGX_LINEFEED_SIZE;
buffer = log[l].file ? log[l].file->data : NULL;
if (buffer) {
if (len > (size_t) (buffer->last - buffer->pos)) {
ngx_stream_log_write(s, &log[l], buffer->start,
buffer->pos - buffer->start);
buffer->pos = buffer->start;
}
if (len <= (size_t) (buffer->last - buffer->pos)) {
p = buffer->pos;
if (buffer->event && p == buffer->start) {
ngx_add_timer(buffer->event, buffer->flush);
}
for (i = 0; i < log[l].format->ops->nelts; i++) {
p = op[i].run(s, p, &op[i]);
}
ngx_linefeed(p);
buffer->pos = p;
continue;
}
if (buffer->event && buffer->event->timer_set) {
ngx_del_timer(buffer->event);
}
}
alloc_line:
line = ngx_pnalloc(s->connection->pool, len);
if (line == NULL) {
return NGX_ERROR;
}
p = line;
if (log[l].syslog_peer) {
p = ngx_syslog_add_header(log[l].syslog_peer, line);
}
for (i = 0; i < log[l].format->ops->nelts; i++) {
p = op[i].run(s, p, &op[i]);
}
if (log[l].syslog_peer) {
size = p - line;
n = ngx_syslog_send(log[l].syslog_peer, line, size);
if (n < 0) {
ngx_log_error(NGX_LOG_WARN, s->connection->log, 0,
"send() to syslog failed");
} else if ((size_t) n != size) {
ngx_log_error(NGX_LOG_WARN, s->connection->log, 0,
"send() to syslog has written only %z of %uz",
n, size);
}
continue;
}
ngx_linefeed(p);
ngx_stream_log_write(s, &log[l], line, p - line);
}
return NGX_OK;
}
static void
ngx_stream_log_write(ngx_stream_session_t *s, ngx_stream_log_t *log,
u_char *buf, size_t len)
{
u_char *name;
time_t now;
ssize_t n;
ngx_err_t err;
#if (NGX_ZLIB)
ngx_stream_log_buf_t *buffer;
#endif
if (log->script == NULL) {
name = log->file->name.data;
#if (NGX_ZLIB)
buffer = log->file->data;
if (buffer && buffer->gzip) {
n = ngx_stream_log_gzip(log->file->fd, buf, len, buffer->gzip,
s->connection->log);
} else {
n = ngx_write_fd(log->file->fd, buf, len);
}
#else
n = ngx_write_fd(log->file->fd, buf, len);
#endif
} else {
name = NULL;
n = ngx_stream_log_script_write(s, log->script, &name, buf, len);
}
if (n == (ssize_t) len) {
return;
}
now = ngx_time();
if (n == -1) {
err = ngx_errno;
if (err == NGX_ENOSPC) {
log->disk_full_time = now;
}
if (now - log->error_log_time > 59) {
ngx_log_error(NGX_LOG_ALERT, s->connection->log, err,
ngx_write_fd_n " to \"%s\" failed", name);
log->error_log_time = now;
}
return;
}
if (now - log->error_log_time > 59) {
ngx_log_error(NGX_LOG_ALERT, s->connection->log, 0,
ngx_write_fd_n " to \"%s\" was incomplete: %z of %uz",
name, n, len);
log->error_log_time = now;
}
}
static ssize_t
ngx_stream_log_script_write(ngx_stream_session_t *s,
ngx_stream_log_script_t *script, u_char **name, u_char *buf, size_t len)
{
ssize_t n;
ngx_str_t log;
ngx_open_file_info_t of;
ngx_stream_log_srv_conf_t *lscf;
if (ngx_stream_script_run(s, &log, script->lengths->elts, 1,
script->values->elts)
== NULL)
{
/* simulate successful logging */
return len;
}
log.data[log.len - 1] = '\0';
*name = log.data;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream log \"%s\"", log.data);
lscf = ngx_stream_get_module_srv_conf(s, ngx_stream_log_module);
ngx_memzero(&of, sizeof(ngx_open_file_info_t));
of.log = 1;
of.valid = lscf->open_file_cache_valid;
of.min_uses = lscf->open_file_cache_min_uses;
of.directio = NGX_OPEN_FILE_DIRECTIO_OFF;
if (ngx_open_cached_file(lscf->open_file_cache, &log, &of,
s->connection->pool)
!= NGX_OK)
{
if (of.err == 0) {
/* simulate successful logging */
return len;
}
ngx_log_error(NGX_LOG_CRIT, s->connection->log, ngx_errno,
"%s \"%s\" failed", of.failed, log.data);
/* simulate successful logging */
return len;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream log #%d", of.fd);
n = ngx_write_fd(of.fd, buf, len);
return n;
}
#if (NGX_ZLIB)
static ssize_t
ngx_stream_log_gzip(ngx_fd_t fd, u_char *buf, size_t len, ngx_int_t level,
ngx_log_t *log)
{
int rc, wbits, memlevel;
u_char *out;
size_t size;
ssize_t n;
z_stream zstream;
ngx_err_t err;
ngx_pool_t *pool;
wbits = MAX_WBITS;
memlevel = MAX_MEM_LEVEL - 1;
while ((ssize_t) len < ((1 << (wbits - 1)) - 262)) {
wbits--;
memlevel--;
}
/*
* This is a formula from deflateBound() for conservative upper bound of
* compressed data plus 18 bytes of gzip wrapper.
*/
size = len + ((len + 7) >> 3) + ((len + 63) >> 6) + 5 + 18;
ngx_memzero(&zstream, sizeof(z_stream));
pool = ngx_create_pool(256, log);
if (pool == NULL) {
/* simulate successful logging */
return len;
}
pool->log = log;
zstream.zalloc = ngx_stream_log_gzip_alloc;
zstream.zfree = ngx_stream_log_gzip_free;
zstream.opaque = pool;
out = ngx_pnalloc(pool, size);
if (out == NULL) {
goto done;
}
zstream.next_in = buf;
zstream.avail_in = len;
zstream.next_out = out;
zstream.avail_out = size;
rc = deflateInit2(&zstream, (int) level, Z_DEFLATED, wbits + 16, memlevel,
Z_DEFAULT_STRATEGY);
if (rc != Z_OK) {
ngx_log_error(NGX_LOG_ALERT, log, 0, "deflateInit2() failed: %d", rc);
goto done;
}
ngx_log_debug4(NGX_LOG_DEBUG_STREAM, log, 0,
"deflate in: ni:%p no:%p ai:%ud ao:%ud",
zstream.next_in, zstream.next_out,
zstream.avail_in, zstream.avail_out);
rc = deflate(&zstream, Z_FINISH);
if (rc != Z_STREAM_END) {
ngx_log_error(NGX_LOG_ALERT, log, 0,
"deflate(Z_FINISH) failed: %d", rc);
goto done;
}
ngx_log_debug5(NGX_LOG_DEBUG_STREAM, log, 0,
"deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
zstream.next_in, zstream.next_out,
zstream.avail_in, zstream.avail_out,
rc);
size -= zstream.avail_out;
rc = deflateEnd(&zstream);
if (rc != Z_OK) {
ngx_log_error(NGX_LOG_ALERT, log, 0, "deflateEnd() failed: %d", rc);
goto done;
}
n = ngx_write_fd(fd, out, size);
if (n != (ssize_t) size) {
err = (n == -1) ? ngx_errno : 0;
ngx_destroy_pool(pool);
ngx_set_errno(err);
return -1;
}
done:
ngx_destroy_pool(pool);
/* simulate successful logging */
return len;
}
static void *
ngx_stream_log_gzip_alloc(void *opaque, u_int items, u_int size)
{
ngx_pool_t *pool = opaque;
ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pool->log, 0,
"gzip alloc: n:%ud s:%ud", items, size);
return ngx_palloc(pool, items * size);
}
static void
ngx_stream_log_gzip_free(void *opaque, void *address)
{
#if 0
ngx_pool_t *pool = opaque;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pool->log, 0,
"gzip free: %p", address);
#endif
}
#endif
static void
ngx_stream_log_flush(ngx_open_file_t *file, ngx_log_t *log)
{
size_t len;
ssize_t n;
ngx_stream_log_buf_t *buffer;
buffer = file->data;
len = buffer->pos - buffer->start;
if (len == 0) {
return;
}
#if (NGX_ZLIB)
if (buffer->gzip) {
n = ngx_stream_log_gzip(file->fd, buffer->start, len, buffer->gzip,
log);
} else {
n = ngx_write_fd(file->fd, buffer->start, len);
}
#else
n = ngx_write_fd(file->fd, buffer->start, len);
#endif
if (n == -1) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_write_fd_n " to \"%s\" failed",
file->name.data);
} else if ((size_t) n != len) {
ngx_log_error(NGX_LOG_ALERT, log, 0,
ngx_write_fd_n " to \"%s\" was incomplete: %z of %uz",
file->name.data, n, len);
}
buffer->pos = buffer->start;
if (buffer->event && buffer->event->timer_set) {
ngx_del_timer(buffer->event);
}
}
static void
ngx_stream_log_flush_handler(ngx_event_t *ev)
{
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"stream log buffer flush handler");
ngx_stream_log_flush(ev->data, ev->log);
}
static u_char *
ngx_stream_log_copy_short(ngx_stream_session_t *s, u_char *buf,
ngx_stream_log_op_t *op)
{
size_t len;
uintptr_t data;
len = op->len;
data = op->data;
while (len--) {
*buf++ = (u_char) (data & 0xff);
data >>= 8;
}
return buf;
}
static u_char *
ngx_stream_log_copy_long(ngx_stream_session_t *s, u_char *buf,
ngx_stream_log_op_t *op)
{
return ngx_cpymem(buf, (u_char *) op->data, op->len);
}
static ngx_int_t
ngx_stream_log_variable_compile(ngx_conf_t *cf, ngx_stream_log_op_t *op,
ngx_str_t *value, ngx_uint_t escape)
{
ngx_int_t index;
index = ngx_stream_get_variable_index(cf, value);
if (index == NGX_ERROR) {
return NGX_ERROR;
}
op->len = 0;
switch (escape) {
case NGX_STREAM_LOG_ESCAPE_JSON:
op->getlen = ngx_stream_log_json_variable_getlen;
op->run = ngx_stream_log_json_variable;
break;
case NGX_STREAM_LOG_ESCAPE_NONE:
op->getlen = ngx_stream_log_unescaped_variable_getlen;
op->run = ngx_stream_log_unescaped_variable;
break;
default: /* NGX_STREAM_LOG_ESCAPE_DEFAULT */
op->getlen = ngx_stream_log_variable_getlen;
op->run = ngx_stream_log_variable;
}
op->data = index;
return NGX_OK;
}
static size_t
ngx_stream_log_variable_getlen(ngx_stream_session_t *s, uintptr_t data)
{
uintptr_t len;
ngx_stream_variable_value_t *value;
value = ngx_stream_get_indexed_variable(s, data);
if (value == NULL || value->not_found) {
return 1;
}
len = ngx_stream_log_escape(NULL, value->data, value->len);
value->escape = len ? 1 : 0;
return value->len + len * 3;
}
static u_char *
ngx_stream_log_variable(ngx_stream_session_t *s, u_char *buf,
ngx_stream_log_op_t *op)
{
ngx_stream_variable_value_t *value;
value = ngx_stream_get_indexed_variable(s, op->data);
if (value == NULL || value->not_found) {
*buf = '-';
return buf + 1;
}
if (value->escape == 0) {
return ngx_cpymem(buf, value->data, value->len);
} else {
return (u_char *) ngx_stream_log_escape(buf, value->data, value->len);
}
}
static uintptr_t
ngx_stream_log_escape(u_char *dst, u_char *src, size_t size)
{
ngx_uint_t n;
static u_char hex[] = "0123456789ABCDEF";
static uint32_t escape[] = {
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
/* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
0x00000004, /* 0000 0000 0000 0000 0000 0000 0000 0100 */
/* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
0x10000000, /* 0001 0000 0000 0000 0000 0000 0000 0000 */
/* ~}| {zyx wvut srqp onml kjih gfed cba` */
0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
};
if (dst == NULL) {
/* find the number of the characters to be escaped */
n = 0;
while (size) {
if (escape[*src >> 5] & (1U << (*src & 0x1f))) {
n++;
}
src++;
size--;
}
return (uintptr_t) n;
}
while (size) {
if (escape[*src >> 5] & (1U << (*src & 0x1f))) {
*dst++ = '\\';
*dst++ = 'x';
*dst++ = hex[*src >> 4];
*dst++ = hex[*src & 0xf];
src++;
} else {
*dst++ = *src++;
}
size--;
}
return (uintptr_t) dst;
}
static size_t
ngx_stream_log_json_variable_getlen(ngx_stream_session_t *s, uintptr_t data)
{
uintptr_t len;
ngx_stream_variable_value_t *value;
value = ngx_stream_get_indexed_variable(s, data);
if (value == NULL || value->not_found) {
return 0;
}
len = ngx_escape_json(NULL, value->data, value->len);
value->escape = len ? 1 : 0;
return value->len + len;
}
static u_char *
ngx_stream_log_json_variable(ngx_stream_session_t *s, u_char *buf,
ngx_stream_log_op_t *op)
{
ngx_stream_variable_value_t *value;
value = ngx_stream_get_indexed_variable(s, op->data);
if (value == NULL || value->not_found) {
return buf;
}
if (value->escape == 0) {
return ngx_cpymem(buf, value->data, value->len);
} else {
return (u_char *) ngx_escape_json(buf, value->data, value->len);
}
}
static size_t
ngx_stream_log_unescaped_variable_getlen(ngx_stream_session_t *s,
uintptr_t data)
{
ngx_stream_variable_value_t *value;
value = ngx_stream_get_indexed_variable(s, data);
if (value == NULL || value->not_found) {
return 0;
}
value->escape = 0;
return value->len;
}
static u_char *
ngx_stream_log_unescaped_variable(ngx_stream_session_t *s, u_char *buf,
ngx_stream_log_op_t *op)
{
ngx_stream_variable_value_t *value;
value = ngx_stream_get_indexed_variable(s, op->data);
if (value == NULL || value->not_found) {
return buf;
}
return ngx_cpymem(buf, value->data, value->len);
}
static void *
ngx_stream_log_create_main_conf(ngx_conf_t *cf)
{
ngx_stream_log_main_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_log_main_conf_t));
if (conf == NULL) {
return NULL;
}
if (ngx_array_init(&conf->formats, cf->pool, 4,
sizeof(ngx_stream_log_fmt_t))
!= NGX_OK)
{
return NULL;
}
return conf;
}
static void *
ngx_stream_log_create_srv_conf(ngx_conf_t *cf)
{
ngx_stream_log_srv_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_log_srv_conf_t));
if (conf == NULL) {
return NULL;
}
conf->open_file_cache = NGX_CONF_UNSET_PTR;
return conf;
}
static char *
ngx_stream_log_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_stream_log_srv_conf_t *prev = parent;
ngx_stream_log_srv_conf_t *conf = child;
if (conf->open_file_cache == NGX_CONF_UNSET_PTR) {
conf->open_file_cache = prev->open_file_cache;
conf->open_file_cache_valid = prev->open_file_cache_valid;
conf->open_file_cache_min_uses = prev->open_file_cache_min_uses;
if (conf->open_file_cache == NGX_CONF_UNSET_PTR) {
conf->open_file_cache = NULL;
}
}
if (conf->logs || conf->off) {
return NGX_CONF_OK;
}
conf->logs = prev->logs;
conf->off = prev->off;
return NGX_CONF_OK;
}
static char *
ngx_stream_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_log_srv_conf_t *lscf = conf;
ssize_t size;
ngx_int_t gzip;
ngx_uint_t i, n;
ngx_msec_t flush;
ngx_str_t *value, name, s;
ngx_stream_log_t *log;
ngx_syslog_peer_t *peer;
ngx_stream_log_buf_t *buffer;
ngx_stream_log_fmt_t *fmt;
ngx_stream_script_compile_t sc;
ngx_stream_log_main_conf_t *lmcf;
ngx_stream_compile_complex_value_t ccv;
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "off") == 0) {
lscf->off = 1;
if (cf->args->nelts == 2) {
return NGX_CONF_OK;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid parameter \"%V\"", &value[2]);
return NGX_CONF_ERROR;
}
if (lscf->logs == NULL) {