ngx_shm_zone_t *
ngx_http_get_shm_zone(ngx_str_t *shm_name_t) {
ngx_shm_zone_t **zone;
size_t i;
zone = g_shm_dict_list->elts;
if (g_shm_dict_list == NULL || zone == NULL) {
return NULL;
}
for (i = 0; i < g_shm_dict_list->nelts; i++) {
if( shm_name_t->len == 0 && i == 0) {
ngx_log_error(NGX_LOG_DEBUG, ((ngx_shm_dict_ctx_t *)(zone[i]->data))->log, 0,
"[ah_shm_zone] process=[%d] get_shm_zone default name is %V \n",
ngx_getpid(),&zone[i]->shm.name);
return zone[i];
}
if ( ngx_strcmp(shm_name_t->data, zone[i]->shm.name.data) == 0) {
ngx_log_error(NGX_LOG_DEBUG, ((ngx_shm_dict_ctx_t *)(zone[i]->data))->log, 0,
"[ah_shm_zone] process=[%d] get_shm_zone name is %V \n",
ngx_getpid(),shm_name_t);
return zone[i];
}
}
return NULL;
}
/**
* 上下文初始化
*/
int TestContext::ctx_init(ngx_cycle_t* cycle)
{
test_config_t* cfg = &this->m_config;
this->m_cycle = cycle;
this->m_mysql_pool = mysql_pool_new(cfg->mysql_config.conns, &cfg->mysql_config);
NLOG_INFO("[%d] mysql_pool: %p", ngx_getpid(), this->m_mysql_pool);
#define SQL_CREATE_TBL "drop table if exists ngx_test; "\
"create table ngx_test(`key` varchar(32) primary key,value int default 0); "\
"insert into ngx_test values('testkey', 0);"
int ret = 0;
MYSQL* mysql = this->mysql_get();
if(mysql == NULL){
NLOG_ERROR("get mysql connection failed!");
ret = ERRNO_SYSTEM;
return ret;
}
NLOG_INFO("init ngx_test table!");
ret = mysql_queryex(mysql, SQL_CREATE_TBL);
NLOG_INFO("init ngx_test table ret:%d", ret);
if(ret == 0){
mysql_free_all_result(mysql);
}else{
NLOG_ERROR("init table failed!ret:%d, sql:[%s]", ret, SQL_CREATE_TBL);
ret = ERRNO_SYSTEM;
}
// 在Init中取得的链接必须关闭掉，因为这个链接不是非阻塞的。
this->mysql_close(mysql);
return NGX_OK;
}
ngx_int_t
ngx_daemon(ngx_log_t *log)
{
int fd;
switch (fork()) {
case -1:
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "fork() failed");
return NGX_ERROR;
case 0:
break;
default:
exit(0);
}
ngx_parent = ngx_pid;
ngx_pid = ngx_getpid();
if (setsid() == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "setsid() failed");
return NGX_ERROR;
}
umask(0);
fd = open("/dev/null", O_RDWR);
if (fd == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
"open(\"/dev/null\") failed");
return NGX_ERROR;
}
if (dup2(fd, STDIN_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDIN) failed");
return NGX_ERROR;
}
if (dup2(fd, STDOUT_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDOUT) failed");
return NGX_ERROR;
}
#if 0
if (dup2(fd, STDERR_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDERR) failed");
return NGX_ERROR;
}
#endif
if (fd > STDERR_FILENO) {
if (close(fd) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
/*创建守护进程，具体创建方法可以参考《unix环境高级编程》*/
ngx_int_t ngx_daemon(ngx_log_t *log)
{
int fd;
switch (fork()) {
case -1:
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "fork() failed");
return NGX_ERROR;
case 0: //子进程作为守护进程
break;
default:
exit(0); //父进程退出
}
ngx_pid = ngx_getpid();
if (setsid() == -1) { //setsid创建一个新会话
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "setsid() failed");
return NGX_ERROR;
}
umask(0);
//打开文件/dev/null,使得其拥有守护进程的0，1，2。这样防止守护进程在终端设备上显示输出
fd = open("/dev/null", O_RDWR);
if (fd == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
"open(\"/dev/null\") failed");
return NGX_ERROR;
}
if (dup2(fd, STDIN_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDIN) failed");
return NGX_ERROR;
}
if (dup2(fd, STDOUT_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDOUT) failed");
return NGX_ERROR;
}
#if 0
if (dup2(fd, STDERR_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDERR) failed");
return NGX_ERROR;
}
#endif
if (fd > STDERR_FILENO) {
if (close(fd) == -1) { //关闭不需要的文件描述符
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
ngx_int_t ngx_http_shmtest_init_process(ngx_cycle_t *cycle)
{
shmtest_main_conf_t* conf = (shmtest_main_conf_t*)ngx_get_conf(cycle->conf_ctx, ngx_http_shmtest_module);
if(conf == NULL){
NLOG_INFO("conf is null!");
return 0;
}
printf("process [%d] inited!\n", ngx_getpid());
//多进程并发测试
int i;
int64_t ret=0;
for(i=0;i<10000;i++){
ngx_str_t key = ngx_string("test");
ngx_shmap_inc_int(conf->shmap, &key, 1, 0, &ret);
}
printf("process [%d] init ok! ret=%lld\n", ngx_getpid(), (long long)ret);
return 0;
}
static ngx_int_t
worker_process_write_out_stats(u_char *name, size_t len, void *val, void *para1, void *para2)
{
ngx_uint_t i;
ngx_http_accounting_stats_t *stats;
char output_buffer[1024];
ngx_uint_t status_code_buckets[10];
ngx_memzero(status_code_buckets, sizeof(status_code_buckets));
stats = (ngx_http_accounting_stats_t *)val;
if (stats->nr_requests > 0) {
for (i = 0; i < http_status_code_count; i++) {
if (index_to_http_status_code_map[i] == NGX_HTTP_CLIENT_CLOSED_REQUEST) {
status_code_buckets[9] += stats->http_status_code[i];
} else {
ngx_uint_t bucket_idx = index_to_http_status_code_map[i] / 100;
status_code_buckets[bucket_idx] += stats->http_status_code[i];
}
stats->http_status_code[i] = 0;
}
} else {
// no requests, let's not emit any stats!
return NGX_OK;
}
sprintf(output_buffer, "%i|%ld|%ld|%s|%ld|%ld|%ld|%lu|%lu|%lu|%lu|%lu|%lu",
ngx_getpid(),
ngx_http_accounting_old_time,
ngx_http_accounting_new_time,
name,
stats->nr_requests,
stats->bytes_in,
stats->bytes_out,
stats->total_latency_ms / (stats->nr_requests > 0 ? stats->nr_requests : 1),
stats->upstream_total_latency_ms / (stats->nr_requests > 0 ? stats->nr_requests : 1),
status_code_buckets[2],
status_code_buckets[4],
status_code_buckets[5],
status_code_buckets[9]
);
stats->nr_requests = 0;
stats->bytes_out = 0;
stats->bytes_in = 0;
stats->total_latency_ms = 0;
stats->upstream_total_latency_ms = 0;
syslog(LOG_INFO, "%s", output_buffer);
return NGX_OK;
}
ngx_int_t
ngx_http_accounting_worker_process_init(ngx_cycle_t *cycle)
{
ngx_int_t rc;
ngx_time_t *time;
ngx_http_accounting_main_conf_t *amcf;
amcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_accounting_module);
if (!amcf->enable) {
return NGX_OK;
}
init_http_status_code_map();
time = ngx_timeofday();
ngx_http_accounting_old_time = time->sec;
ngx_http_accounting_new_time = time->sec;
openlog((char *)ngx_http_accounting_title, LOG_NDELAY, LOG_SYSLOG);
syslog(LOG_INFO, "pid:%i|Process:init", ngx_getpid());
rc = ngx_http_accounting_hash_init(&stats_hash, NGX_HTTP_ACCOUNTING_NR_BUCKETS, cycle->pool);
if (rc != NGX_OK) {
return rc;
}
ngx_memzero(&write_out_ev, sizeof(ngx_event_t));
write_out_ev.data = NULL;
write_out_ev.log = cycle->log;
write_out_ev.handler = worker_process_alarm_handler;
srand(ngx_getpid());
ngx_add_timer(&write_out_ev, WORKER_PROCESS_TIMER_INTERVAL*(1000-rand()%200));
return NGX_OK;
}
void ngx_http_accounting_worker_process_exit(ngx_cycle_t *cycle)
{
ngx_http_accounting_main_conf_t *amcf;
amcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_accounting_module);
if (!amcf->enable) {
return;
}
worker_process_alarm_handler(NULL);
syslog(LOG_INFO, "pid:%i|Process:exit", ngx_getpid());
}
ngx_int_t ngx_daemon(ngx_log_t *log)
{
int fd;
switch (fork()) {
case -1:
printf("fork() failed");
return NGX_ERROR;
case 0: /* child process */
break;
default: /* parent process*/
exit(0);
}
ngx_pid = ngx_getpid();
if (setsid() == -1) {
printf("setsid() failed");
return NGX_ERROR;
}
umask(0);
fd = open("/dev/null", O_RDWR);
if (fd == -1) {
printf("open(\"/dev/null\") failed");
return NGX_ERROR;
}
if (dup2(fd, STDIN_FILENO) == -1) {
printf("dup2(STDIN) failed");
return NGX_ERROR;
}
if (dup2(fd, STDOUT_FILENO) == -1) {
printf("dup2(STDOUT) failed");
return NGX_ERROR;
}
if (fd > STDERR_FILENO) {
if (close(fd) == -1) {
printf("close() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
static ngx_int_t
worker_process_write_out_stats(u_char *name, size_t len, void *val, void *para1, void *para2)
{
ngx_uint_t i;
ngx_http_accounting_stats_t *stats;
char temp_buffer[128];
char output_buffer[1024];
stats = (ngx_http_accounting_stats_t *)val;
if (stats->nr_requests == 0) {
return NGX_OK;
}
sprintf(output_buffer, "pid:%i|from:%ld|to:%ld|accounting_id:%s|requests:%ld|bytes_in:%ld|bytes_out:%ld|latency_ms:%lu|upstream_latency_ms:%lu",
ngx_getpid(),
ngx_http_accounting_old_time,
ngx_http_accounting_new_time,
name,
stats->nr_requests,
stats->bytes_in,
stats->bytes_out,
stats->total_latency_ms,
stats->total_upstream_latency_ms
);
stats->nr_requests = 0;
stats->bytes_in = 0;
stats->bytes_out = 0;
stats->total_latency_ms = 0;
stats->total_upstream_latency_ms = 0;
for (i = 0; i < http_status_code_count; i++) {
if(stats->http_status_code[i] > 0) {
sprintf(temp_buffer, "|%ld:%ld",
index_to_http_status_code_map[i],
stats->http_status_code[i]);
strcat(output_buffer, temp_buffer);
stats->http_status_code[i] = 0;
}
}
syslog(LOG_INFO, "%s", output_buffer);
return NGX_OK;
}
int
ngx_shm_dict_handler_delete(ngx_shm_zone_t* zone_t, ngx_str_t *key) {
int rc;
ngx_shm_dict_ctx_t *ctx;
ctx = zone_t->data;
rc = ngx_shm_dict_delete(zone_t,key);
ngx_log_error(NGX_LOG_DEBUG, ctx->log, 0,
"[ah_shm_zone] process=[%d] operator=[%s] zone=[%V] key=[%V] "
"rc=[%d]\n",ngx_getpid(),"del",&zone_t->shm.name,key,rc);
return rc;
}
int
ngx_shm_dict_handler_flush_all(ngx_shm_zone_t* zone_t) {
int rc;
ngx_shm_dict_ctx_t *ctx;
ctx = zone_t->data;
rc = ngx_shm_dict_flush_all(zone_t);
ngx_log_error(NGX_LOG_DEBUG, ctx->log, 0,
"[ah_shm_zone] process=[%d] operator=[%s] zone=[%V] rc=[%d]\n",
ngx_getpid(),"flush",&zone_t->shm.name,rc);
return rc;
}
int ngx_shm_dict_handler_set_exptime(ngx_shm_zone_t* zone_t, ngx_str_t* key,
uint32_t exptime) {
int rc;
ngx_shm_dict_ctx_t *ctx;
ctx = zone_t->data;
rc = ngx_shm_dict_set_exptime(zone_t, key,exptime);
ngx_log_error(NGX_LOG_DEBUG, ctx->log, 0,
"[ah_shm_zone] process=[%d] operator=[%s] zone=[%V] key=[%V] "
"exptime=[%d] rc=[%d]\n",ngx_getpid(),"set",
&zone_t->shm.name,key,exptime,rc);
return rc;
}
static void
ngx_error_signal_handler(int signo)
{
void *buffer;
size_t size;
ngx_log_t *log;
ngx_signal_t *sig;
struct sigaction sa;
ngx_backtrace_conf_t *bcf;
for (sig = ngx_backtrace_signals; sig->signo != 0; sig++) {
if (sig->signo == signo) {
break;
}
}
bcf = (ngx_backtrace_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx,
ngx_backtrace_module);
log = bcf->log ? bcf->log : ngx_cycle->log;
ngx_log_error(NGX_LOG_ERR, log, 0,
"nginx coredump by signal %d (%s)", signo, sig->signame);
ngx_memzero(&sa, sizeof(struct sigaction));
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
if (sigaction(signo, &sa, NULL) == -1) {
ngx_log_error(NGX_LOG_ERR, log, ngx_errno,
"sigaction(%s) failed", sig->signame);
}
if (bcf->max_stack_size == NGX_CONF_UNSET) {
bcf->max_stack_size = NGX_BACKTRACE_DEFAULT_STACK_MAX_SIZE;
}
buffer = ngx_pcalloc(ngx_cycle->pool, sizeof(void *) * bcf->max_stack_size);
if (buffer == NULL) {
goto invalid;
}
size = backtrace(buffer, bcf->max_stack_size);
backtrace_symbols_fd(buffer, size, log->file->fd);
invalid:
kill(ngx_getpid(), signo);
}
int
ngx_shm_dict_handler_incr_int(ngx_shm_zone_t* zone_t, ngx_str_t *key, int count,
uint32_t exptime,int64_t* res) {
int rc;
ngx_shm_dict_ctx_t *ctx;
ctx = zone_t->data;
rc = ngx_shm_dict_inc_int(zone_t, key, count,0, res);
ngx_log_error(NGX_LOG_DEBUG, ctx->log, 0,
"[ah_shm_zone] process=[%d] operator=[%s] zone=[%V] key=[%V] "
"count=[%d] exptime=[%d] rc=[%d]\n",ngx_getpid(),"incr",
&zone_t->shm.name,key,count,exptime,rc);
return rc;
}
int
ngx_shm_dict_handler_get(ngx_shm_zone_t *zone_t,ngx_str_t *key,ngx_str_t *value,
uint32_t *exptime) {
int rc;
ngx_shm_dict_ctx_t *ctx;
uint8_t value_type = SHM_STRING;
ctx = zone_t->data;
rc = ngx_shm_dict_get(zone_t, key,value,&value_type,exptime,0);
ngx_log_error(NGX_LOG_DEBUG, ctx->log, 0,
"[ah_shm_zone] process=[%d] operator=[%s] zone=[%V] key=[%V] "
"value=[%V] exptime=[%d] rc=[%d]\n",ngx_getpid(),"get",
&zone_t->shm.name,key,value,*exptime,rc);
return rc;
}
static ngx_int_t
ngx_rtmp_stat_handler(ngx_http_request_t *r)
{
ngx_rtmp_stat_loc_conf_t *slcf;
ngx_rtmp_core_main_conf_t *cmcf;
ngx_rtmp_core_srv_conf_t **cscf;
ngx_chain_t *cl, *l, **ll, ***lll;
size_t n;
off_t len;
static u_char tbuf[NGX_TIME_T_LEN + 1];
static u_char nbuf[NGX_OFF_T_LEN + 1];
slcf = ngx_http_get_module_loc_conf(r, ngx_rtmp_stat_module);
if (slcf->stat == 0) {
return NGX_DECLINED;
}
cmcf = ngx_rtmp_core_main_conf;
if (cmcf == NULL) {
goto error;
}
cl = NULL;
ll = &cl;
lll = ≪
NGX_RTMP_STAT_L("<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n");
if (slcf->stylesheet.len) {
NGX_RTMP_STAT_L("<?xml-stylesheet type=\"text/xsl\" href=\"");
NGX_RTMP_STAT_ES(&slcf->stylesheet);
NGX_RTMP_STAT_L("\" ?>\r\n");
}
NGX_RTMP_STAT_L("<rtmp>\r\n");
#ifdef NGINX_VERSION
NGX_RTMP_STAT_L("<version>" NGINX_VERSION "</version>\r\n");
#endif
#ifdef NGX_COMPILER
NGX_RTMP_STAT_L("<compiler>" NGX_COMPILER "</compiler>\r\n");
#endif
NGX_RTMP_STAT_L("<built>" __DATE__ " " __TIME__ "</built>\r\n");
NGX_RTMP_STAT_L("<pid>");
NGX_RTMP_STAT(nbuf, ngx_snprintf(nbuf, sizeof(nbuf),
"%ui", (ngx_uint_t) ngx_getpid()) - nbuf);
NGX_RTMP_STAT_L("</pid>\r\n");
NGX_RTMP_STAT_L("<uptime>");
NGX_RTMP_STAT(tbuf, ngx_snprintf(tbuf, sizeof(tbuf),
"%T", ngx_cached_time->sec - start_time) - tbuf);
NGX_RTMP_STAT_L("</uptime>\r\n");
NGX_RTMP_STAT_L("<naccepted>");
NGX_RTMP_STAT(nbuf, ngx_snprintf(nbuf, sizeof(nbuf),
"%ui", ngx_rtmp_naccepted) - nbuf);
NGX_RTMP_STAT_L("</naccepted>\r\n");
ngx_rtmp_stat_bw(r, lll, &ngx_rtmp_bw_in, &ngx_rtmp_bw_out);
cscf = cmcf->servers.elts;
for (n = 0; n < cmcf->servers.nelts; ++n, ++cscf) {
ngx_rtmp_stat_server(r, lll, *cscf);
}
NGX_RTMP_STAT_L("</rtmp>\r\n");
len = 0;
for (l = cl; l; l = l->next) {
len += (l->buf->last - l->buf->pos);
}
ngx_str_set(&r->headers_out.content_type, "text/xml");
r->headers_out.content_length_n = len;
r->headers_out.status = NGX_HTTP_OK;
ngx_http_send_header(r);
(*ll)->buf->last_buf = 1;
return ngx_http_output_filter(r, cl);
error:
r->headers_out.status = NGX_HTTP_INTERNAL_SERVER_ERROR;
r->headers_out.content_length_n = 0;
return ngx_http_send_header(r);
}
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_int_t i;
ngx_log_t *log;
ngx_cycle_t *cycle, init_cycle;
ngx_core_conf_t *ccf;
ngx_debug_init();
if (ngx_strerror_init() != NGX_OK) {
return 1;
}
if (ngx_get_options(argc, argv) != NGX_OK) {
return 1;
}
if (ngx_show_version) {
ngx_write_stderr("nginx version: " NGINX_VER NGX_LINEFEED);
if (ngx_show_help) {
ngx_write_stderr(
"Usage: nginx [-?hvVtq] [-s signal] [-c filename] "
"[-p prefix] [-g directives]" NGX_LINEFEED
NGX_LINEFEED
"Options:" NGX_LINEFEED
" -?,-h : this help" NGX_LINEFEED
" -v : show version and exit" NGX_LINEFEED
" -V : show version and configure options then exit"
NGX_LINEFEED
" -t : test configuration and exit" NGX_LINEFEED
" -q : suppress non-error messages "
"during configuration testing" NGX_LINEFEED
" -s signal : send signal to a master process: "
"stop, quit, reopen, reload" NGX_LINEFEED
#ifdef NGX_PREFIX
" -p prefix : set prefix path (default: "
NGX_PREFIX ")" NGX_LINEFEED
#else
" -p prefix : set prefix path (default: NONE)" NGX_LINEFEED
#endif
" -c filename : set configuration file (default: "
NGX_CONF_PATH ")" NGX_LINEFEED
" -g directives : set global directives out of configuration "
"file" NGX_LINEFEED NGX_LINEFEED
);
}
if (ngx_show_configure) {
ngx_write_stderr(
#ifdef NGX_COMPILER
"built by " NGX_COMPILER NGX_LINEFEED
#endif
#if (NGX_SSL)
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
"TLS SNI support enabled" NGX_LINEFEED
#else
"TLS SNI support disabled" NGX_LINEFEED
#endif
#endif
"configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
}
if (!ngx_test_config) {
return 0;
}
}
/* TODO */ ngx_max_sockets = -1;
ngx_time_init();
#if (NGX_PCRE)
ngx_regex_init();
#endif
ngx_pid = ngx_getpid();
log = ngx_log_init(ngx_prefix);
if (log == NULL) {
return 1;
}
/* STUB */
#if (NGX_OPENSSL)
ngx_ssl_init(log);
#endif
/*
* init_cycle->log is required for signal handlers and
* ngx_process_options()
*/
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
init_cycle.pool = ngx_create_pool(1024, log);
if (init_cycle.pool == NULL) {
return 1;
}
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_os_init(log) != NGX_OK) {
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
cycle = ngx_init_cycle(&init_cycle);
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed",
init_cycle.conf_file.data);
}
return 1;
}
if (ngx_test_config) {
if (!ngx_quiet_mode) {
ngx_log_stderr(0, "configuration file %s test is successful",
cycle->conf_file.data);
}
return 0;
}
if (ngx_signal) {
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER;
}
#if !(NGX_WIN32)
if (ngx_init_signals(cycle->log) != NGX_OK) {
return 1;
}
if (!ngx_inherited && ccf->daemon) {
if (ngx_daemon(cycle->log) != NGX_OK) {
return 1;
}
ngx_daemonized = 1;
}
if (ngx_inherited) {
ngx_daemonized = 1;
}
#endif
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (cycle->log->file->fd != ngx_stderr) {
if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
ngx_set_stderr_n " failed");
return 1;
}
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle);
} else {
ngx_master_process_cycle(cycle);
}
return 0;
}
ngx_pid_t
ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data, char *name, ngx_int_t respawn)
{
u_long on;
ngx_pid_t pid;
ngx_int_t s;
if (respawn >= 0) {//ngx_start_worker_processes-> NGX_PROCESS_RESPAWN ,表示要重新创建进程
s = respawn;
} else {//得到当前有多少工作进程创建了ngx_last_process会不断增加的，当然可能有人死了
for (s = 0; s < ngx_last_process; s++) {
if (ngx_processes[s].pid == -1) {
break;
}
}
if (s == NGX_MAX_PROCESSES) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "no more than %d processes can be spawned", NGX_MAX_PROCESSES);
return NGX_INVALID_PID;
}
}
if (respawn != NGX_PROCESS_DETACHED) {//NGX_PROCESS_DETACHED说明是热代码替换
//不是热代码替换
/* Solaris 9 still has no AF_LOCAL */
//创建socketpair，进程之间通信
if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1){
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "socketpair() failed while spawning \"%s\"", name);
return NGX_INVALID_PID;
}
ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, "channel %d:%d", ngx_processes[s].channel[0], ngx_processes[s].channel[1]);
//将socket对设置为非阻塞模式
if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, ngx_nonblocking_n " failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, ngx_nonblocking_n " failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
on = 1;//FIOASYNC 改变O_ASYNC 标志来打开或者关闭套接字的异步 IO 模式。
if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "ioctl(FIOASYNC) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "fcntl(F_SETOWN) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
//close on exec, not on-fork, 意为如果对描述符设置了FD_CLOEXEC，使用execl执行的程序里，
//此描述符被关闭，不能再使用它，但是在使用fork调用的子进程中，此描述符并不关闭，仍可使用。
if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "fcntl(FD_CLOEXEC) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
//设置fork对socket对是在子进程依然可用的
if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "fcntl(FD_CLOEXEC) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
ngx_channel = ngx_processes[s].channel[1];
} else {//如果是热代码替换，不跟其他进程通信
ngx_processes[s].channel[0] = -1;
ngx_processes[s].channel[1] = -1;
}
ngx_process_slot = s;//当前在处理这个
pid = fork();//fork子进程
switch (pid) {
case -1:
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "fork() failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
case 0://子进程调用proc
ngx_pid = ngx_getpid();//k getpid
proc(cycle, data);//等于ngx_worker_process_cycle
//子进程永远也从这回不来了，里面有exit
break;
default://父进程默认不干活
break;
}
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid);
ngx_processes[s].pid = pid;
ngx_processes[s].exited = 0;
if (respawn >= 0) {
return pid;
}
//设置ngx_processes数组该项的信息
ngx_processes[s].proc = proc;//设置工作进程的处理函数ngx_worker_process_cycle，会fork之后调用的
ngx_processes[s].data = data;
ngx_processes[s].name = name;//进程名字
ngx_processes[s].exiting = 0;
switch (respawn) {
case NGX_PROCESS_NORESPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_SPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_DETACHED:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 1;
break;
}
if (s == ngx_last_process) {
ngx_last_process++;//递增总进程数
}
return pid;
}
int ngx_cdecl main(int argc, char *const *argv)
{
ngx_int_t i;
ngx_log_t *log;
ngx_cycle_t *cycle, init_cycle;
ngx_core_conf_t *ccf;
ngx_debug_init(); // posix 系统上为空
// 把0到GX_SYS_NERR的strerror信息存到ngx_sys_errlist里
// 以后错误信息直接从这儿取
if (ngx_strerror_init() != NGX_OK) {
return 1;
}
// 解析命令行
if (ngx_get_options(argc, argv) != NGX_OK) {
return 1;
}
// 显示帮助信息
if (ngx_show_version) {
ngx_write_stderr("nginx version: " NGINX_VER NGX_LINEFEED);
if (ngx_show_help) {
ngx_write_stderr(
"Usage: nginx [-?hvVtq] [-s signal] [-c filename] "
"[-p prefix] [-g directives]" NGX_LINEFEED
NGX_LINEFEED
"Options:" NGX_LINEFEED
" -?,-h : this help" NGX_LINEFEED
" -v : show version and exit" NGX_LINEFEED
" -V : show version and configure options then exit"
NGX_LINEFEED
" -t : test configuration and exit" NGX_LINEFEED
" -q : suppress non-error messages "
"during configuration testing" NGX_LINEFEED
" -s signal : send signal to a master process: "
"stop, quit, reopen, reload" NGX_LINEFEED
#ifdef NGX_PREFIX
" -p prefix : set prefix path (default: "
NGX_PREFIX ")" NGX_LINEFEED
#else
" -p prefix : set prefix path (default: NONE)" NGX_LINEFEED
#endif
" -c filename : set configuration file (default: "
NGX_CONF_PATH ")" NGX_LINEFEED
" -g directives : set global directives out of configuration "
"file" NGX_LINEFEED NGX_LINEFEED
);
}
// 显示编译参数
if (ngx_show_configure) {
ngx_write_stderr(
#ifdef NGX_COMPILER
"built by " NGX_COMPILER NGX_LINEFEED
#endif
#if (NGX_SSL)
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
"TLS SNI support enabled" NGX_LINEFEED
#else
"TLS SNI support disabled" NGX_LINEFEED
#endif
#endif
"configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
}
if (!ngx_test_config) {
return 0;
}
}
/* TODO */ ngx_max_sockets = -1;
ngx_time_init(); // 初始化时钟
#if (NGX_PCRE)
ngx_regex_init();
#endif
ngx_pid = ngx_getpid();
log = ngx_log_init(ngx_prefix); // 初始化错误日志,打开错误日志文件
if (log == NULL) {
return 1;
}
/* STUB */
#if (NGX_OPENSSL)
ngx_ssl_init(log);
#endif
/*
* init_cycle->log is required for signal handlers and ngx_process_options()
*/
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
init_cycle.pool = ngx_create_pool(1024, log);
if (init_cycle.pool == NULL) {
return 1;
}
// 把命令行参数保存在 os/unix/ngx_process.c:30:char **ngx_argv;
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
// 决定NGINX运行的目录
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_os_init(log) != NGX_OK) {
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
// 通过环境变量NGINX完成socket的继承，继承来的socket将会放到init_cycle的listening数组中。同时可以读取master进程传递的平滑升级信息等等
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
//初始化所有模块的index信息，即对所有模块进行编号
//ngx_modules数却是在自动编译的时候生成的，位于objs/ngx_modules.c文件中
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
// 初始化重点都在这儿了
cycle = ngx_init_cycle(&init_cycle);
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed", init_cycle.conf_file.data);
}
return 1;
}
// nginx -t 测试配置文件
if (ngx_test_config) {
if (!ngx_quiet_mode) {
ngx_log_stderr(0, "configuration file %s test is successful", cycle->conf_file.data);
}
return 0;
}
// nginx -s
if (ngx_signal) {
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER;
}
#if !(NGX_WIN32)
if (ngx_init_signals(cycle->log) != NGX_OK) {
return 1;
}
if (!ngx_inherited && ccf->daemon) {
if (ngx_daemon(cycle->log) != NGX_OK) {
return 1;
}
ngx_daemonized = 1;
}
if (ngx_inherited) {
ngx_daemonized = 1;
}
#endif
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (ngx_log_redirect_stderr(cycle) != NGX_OK) {
return 1;
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle);
} else {
ngx_master_process_cycle(cycle);
}
return 0;
}
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_int_t i;
ngx_log_t *log;
ngx_cycle_t *cycle, init_cycle;
ngx_core_conf_t *ccf;
#if !(NGX_WIN32)
struct rlimit rlmt;
#endif
if (ngx_get_options(argc, argv) != NGX_OK) {
return 1;
}
if (ngx_show_version) {
ngx_log_stderr(0, "nginx version: " NGINX_VER);
if (ngx_show_help) {
ngx_log_stderr(0,
"Usage: nginx [-?hvVt] [-s signal] [-c filename] "
"[-p prefix] [-g directives]" CRLF CRLF
"Options:" CRLF
" -?,-h : this help" CRLF
" -v : show version and exit" CRLF
" -V : show version and configure options then exit"
CRLF
" -t : test configuration and exit" CRLF
" -s signal : send signal to a master process: "
"stop, quit, reopen, reload" CRLF
#ifdef NGX_PREFIX
" -p prefix : set prefix path (default: "
NGX_PREFIX ")" CRLF
#else
" -p prefix : set prefix path (default: NONE)" CRLF
#endif
" -c filename : set configuration file (default: "
NGX_CONF_PATH ")" CRLF
" -g directives : set global directives out of configuration "
"file" CRLF
);
}
if (ngx_show_configure) {
#ifdef NGX_COMPILER
ngx_log_stderr(0, "built by " NGX_COMPILER);
#endif
#if (NGX_SSL)
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
ngx_log_stderr(0, "TLS SNI support enabled");
#else
ngx_log_stderr(0, "TLS SNI support disabled");
#endif
#endif
ngx_log_stderr(0, "configure arguments:" NGX_CONFIGURE);
}
if (!ngx_test_config) {
return 0;
}
}
#if (NGX_FREEBSD)
ngx_debug_init();
#endif
/* TODO */ ngx_max_sockets = -1;
ngx_time_init();
#if (NGX_PCRE)
ngx_regex_init();
#endif
ngx_pid = ngx_getpid();
log = ngx_log_init(ngx_prefix);
if (log == NULL) {
return 1;
}
/* STUB */
#if (NGX_OPENSSL)
ngx_ssl_init(log);
#endif
/*
* init_cycle->log is required for signal handlers and
* ngx_process_options()
*/
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
init_cycle.pool = ngx_create_pool(1024, log);
if (init_cycle.pool == NULL) {
return 1;
}
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_os_init(log) != NGX_OK) {
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
cycle = ngx_init_cycle(&init_cycle);
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed",
init_cycle.conf_file.data);
}
return 1;
}
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test is successful",
cycle->conf_file.data);
return 0;
}
if (ngx_signal) {
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER;
}
#if !(NGX_WIN32)
if (geteuid() == 0) {
if (ccf->rlimit_nofile != NGX_CONF_UNSET) {
rlmt.rlim_cur = (rlim_t) ccf->rlimit_nofile;
rlmt.rlim_max = (rlim_t) ccf->rlimit_nofile;
if (setrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"setrlimit(RLIMIT_NOFILE, %i) failed", ccf->rlimit_nofile);
}
}
if (ccf->rlimit_core != NGX_CONF_UNSET_SIZE) {
rlmt.rlim_cur = (rlim_t) ccf->rlimit_core;
rlmt.rlim_max = (rlim_t) ccf->rlimit_core;
if (setrlimit(RLIMIT_CORE, &rlmt) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"setrlimit(RLIMIT_CORE, %i) failed", ccf->rlimit_core);
}
}
#ifdef RLIMIT_SIGPENDING
if (ccf->rlimit_sigpending != NGX_CONF_UNSET) {
rlmt.rlim_cur = (rlim_t) ccf->rlimit_sigpending;
rlmt.rlim_max = (rlim_t) ccf->rlimit_sigpending;
if (setrlimit(RLIMIT_SIGPENDING, &rlmt) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"setrlimit(RLIMIT_SIGPENDING, %i) failed", ccf->rlimit_sigpending);
}
}
#endif
if (setgid(ccf->group) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"setgid(%d) failed", ccf->group);
/* fatal */
exit(2);
}
if (initgroups(ccf->username, ccf->group) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"initgroups(%s, %d) failed", ccf->username, ccf->group);
}
if (setuid(ccf->user) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"setuid(%d) failed", ccf->user);
/* fatal */
exit(2);
}
}
if (ngx_init_signals(cycle->log) != NGX_OK) {
return 1;
}
if (!ngx_inherited && ccf->daemon) {
if (ngx_daemon(cycle->log) != NGX_OK) {
return 1;
}
ngx_daemonized = 1;
}
#endif
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (cycle->log->file->fd != ngx_stderr) {
if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
ngx_set_stderr_n " failed");
return 1;
}
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle);
} else {
ngx_master_process_cycle(cycle);
}
return 0;
}
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_int_t i;
ngx_log_t *log;
ngx_cycle_t *cycle, init_cycle;
ngx_core_conf_t *ccf;
ngx_debug_init();
if (ngx_strerror_init() != NGX_OK) {
return 1;
}
if (ngx_get_options(argc, argv) != NGX_OK) {
return 1;
}
/* TODO */ ngx_max_sockets = -1;
ngx_time_init();
ngx_pid = ngx_getpid();
log = ngx_log_init(ngx_prefix);
if (log == NULL) {
return 1;
}
/* STUB */
/*
* init_cycle->log is required for signal handlers and
* ngx_process_options()
*/
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
init_cycle.pool = ngx_create_pool(1024, log);
if (init_cycle.pool == NULL) {
return 1;
}
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_os_init(log) != NGX_OK) {
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
cycle = ngx_init_cycle(&init_cycle);
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed",
init_cycle.conf_file.data);
}
return 1;
}
if (ngx_test_config) {
if (!ngx_quiet_mode) {
ngx_log_stderr(0, "configuration file %s test is successful",
cycle->conf_file.data);
}
return 0;
}
if (ngx_signal) {
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER;
}
// if (ngx_init_signals(cycle->log) != NGX_OK) {
// return 1;
// }
//
// if (!ngx_inherited && ccf->daemon) {
// if (ngx_daemon(cycle->log) != NGX_OK) {
// return 1;
// }
//
// ngx_daemonized = 1;
// }
//
// if (ngx_inherited) {
// ngx_daemonized = 1;
// }
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (ngx_log_redirect_stderr(cycle) != NGX_OK) {
return 1;
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
// if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle);
// } else {
// ngx_master_process_cycle(cycle);
// }
return 0;
}
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_buf_t *b;
ngx_log_t *log;
ngx_uint_t i;
ngx_cycle_t *cycle, init_cycle;
ngx_conf_dump_t *cd;
ngx_core_conf_t *ccf;
ngx_debug_init();
if (ngx_strerror_init() != NGX_OK) {
return 1;
}
if (ngx_get_options(argc, argv) != NGX_OK) {
return 1;
}
if (ngx_show_version) {
ngx_show_version_info();
if (!ngx_test_config) {
return 0;
}
}
/* TODO */ ngx_max_sockets = -1;
ngx_time_init();
#if (NGX_PCRE)
ngx_regex_init();
#endif
ngx_pid = ngx_getpid();
log = ngx_log_init(ngx_prefix);
if (log == NULL) {
return 1;
}
/* STUB */
#if (NGX_OPENSSL)
ngx_ssl_init(log);
#endif
/*
* init_cycle->log is required for signal handlers and
* ngx_process_options()
*/
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
init_cycle.pool = ngx_create_pool(1024, log);
if (init_cycle.pool == NULL) {
return 1;
}
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_os_init(log) != NGX_OK) {
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
cycle = ngx_init_cycle(&init_cycle);
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed",
init_cycle.conf_file.data);
}
return 1;
}
if (ngx_test_config) {
if (!ngx_quiet_mode) {
ngx_log_stderr(0, "configuration file %s test is successful",
cycle->conf_file.data);
}
if (ngx_dump_config) {
cd = cycle->config_dump.elts;
for (i = 0; i < cycle->config_dump.nelts; i++) {
ngx_write_stdout("# configuration file ");
(void) ngx_write_fd(ngx_stdout, cd[i].name.data,
cd[i].name.len);
ngx_write_stdout(":" NGX_LINEFEED);
b = cd[i].buffer;
(void) ngx_write_fd(ngx_stdout, b->pos, b->last - b->pos);
ngx_write_stdout(NGX_LINEFEED);
}
}
return 0;
}
if (ngx_signal) {
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER;
}
#if !(NGX_WIN32)
if (ngx_init_signals(cycle->log) != NGX_OK) {
return 1;
}
if (!ngx_inherited && ccf->daemon) {
if (ngx_daemon(cycle->log) != NGX_OK) {
return 1;
}
ngx_daemonized = 1;
}
if (ngx_inherited) {
ngx_daemonized = 1;
}
#endif
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (ngx_log_redirect_stderr(cycle) != NGX_OK) {
return 1;
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle);
} else {
ngx_master_process_cycle(cycle);
}
return 0;
}
ngx_pid_t
ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data,
char *name, ngx_int_t respawn)
{
u_long on;
ngx_pid_t pid;
ngx_int_t s;
if (respawn >= 0) {
s = respawn;
} else {
for (s = 0; s < ngx_last_process; s++) {
if (ngx_processes[s].pid == -1) {
break;
}
}
if (s == NGX_MAX_PROCESSES) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"no more than %d processes can be spawned",
NGX_MAX_PROCESSES);
return NGX_INVALID_PID;
}
}
if (respawn != NGX_PROCESS_DETACHED) {
/* Solaris 9 still has no AF_LOCAL */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1)
{
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"socketpair() failed while spawning \"%s\"", name);
return NGX_INVALID_PID;
}
ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
"channel %d:%d",
ngx_processes[s].channel[0],
ngx_processes[s].channel[1]);
if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_nonblocking_n " failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_nonblocking_n " failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
on = 1;
if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"ioctl(FIOASYNC) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(F_SETOWN) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
ngx_channel = ngx_processes[s].channel[1];
} else {
ngx_processes[s].channel[0] = -1;
ngx_processes[s].channel[1] = -1;
}
ngx_process_slot = s;
pid = fork();
switch (pid) {
case -1:
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fork() failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
case 0:
ngx_pid = ngx_getpid();
proc(cycle, data);
break;
default:
break;
}
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid);
ngx_processes[s].pid = pid;
ngx_processes[s].exited = 0;
if (respawn >= 0) {
return pid;
}
ngx_processes[s].proc = proc;
ngx_processes[s].data = data;
ngx_processes[s].name = name;
ngx_processes[s].exiting = 0;
switch (respawn) {
case NGX_PROCESS_NORESPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_SPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_DETACHED:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 1;
break;
}
if (s == ngx_last_process) {
ngx_last_process++;
}
return pid;
}
int query_result_to_cstring(const char* path, char res_string[], size_t size, ngx_http_request_t *r)
{
int ret = 0;
res_string[0] = '\0';
static MYSQL *kconn = NULL;
static int kconnected = 0;
static int kconnect_times = 0;
static int kquery_times = 0;
if(!kconnected) {
kconnect_times ++;
char server[] = "localhost";
char user[] = "root";
char password[] = "[email protected]";
char database[] = "notetask";
kconn = mysql_init(NULL);
if (!mysql_real_connect(kconn, server,user, password, database, 0, NULL, 0)) {
PRINTF_ERROR("mysql connect error : %s\n", mysql_error(kconn));
mysql_close(kconn);
mysql_library_end();
kconn = NULL;
kconnected = 0;
ret = -1;
goto finish;
}
else {
PRINTF_DEBUG("mysql connect OK [%d].\n", getpid());
kconnected = 1;
}
}
//根据请求的path, 组合查询语句.
#define LEN_QUERY_STRING (1024)
char query_string[LEN_QUERY_STRING];
snprintf(query_string, LEN_QUERY_STRING, "%s", "select * from notetask");
int ret_query = mysql_query(kconn, query_string);
kquery_times ++;
if(ret_query) {
PRINTF_ERROR("mysql query error : %s\n", mysql_error(kconn));
mysql_close(kconn);
mysql_library_end();
kconn = NULL;
kconnected = 0;
ret = -1;
goto finish;
}
MYSQL_ROW sqlrow;
MYSQL_RES *res_ptr;
size_t len = 0;
res_ptr = mysql_store_result(kconn);
int64_t uid = 100;
int type = 1;
int count = 18;
int version = 667;
int status = 0;
const char* title = "当前任务";
int page = 1;
int code = 200;
int success = 1;
const char* message = "";
len += snprintf(res_string, size-len,
"{"
"\"notetasks\":{"
"\"uid\":%"PRIu64","
"\"type\":%d,"
"\"count\":%d,"
"\"version\":%d,"
"\"server\":\"%d.%d.%d.%d\","
"\"status\":%d"
"},"
"\"page\":{"
"\"title\":\"%s\","
"\"page\":%d"
"},"
"\"code\":%d,"
"\"success\":%s,"
"\"message\":\"%s\","
"\"notes\":[",
uid,
type,
count,
version,
ngx_getpid(), ngx_log_tid, kconnect_times, kquery_times,
status,
title,
page,
code,
success?"true":"false",
message);
int row_number = 0;
if(res_ptr) {
while((sqlrow = mysql_fetch_row(res_ptr)) && len + 1 < size) {
row_number ++;
len += snprintf(res_string + len, size - len,
"%s{"
"\"uid\":%s,"
"\"status\":%s,"
"\"startDateTime\":\"%s\","
"\"finishDateTime\":\"%s\","
"\"commitDateTime\":\"%s\","
"\"updateDateTime\":\"%s\","
"\"content\":\"%s\","
"\"isShared\":%s,"
"\"isOnlyLocal\":%s,"
"\"isOnlyWorkday\":%s,"
"\"isDailyRepeat\":%s,"
"\"isWeeklyRepeat\":%s,"
"\"isYearlyRepeat\":%s,"
"\"commentNumber\":%ld,"
"\"likeNumber\":%ld"
"}",
row_number > 1 ? "," : "",
sqlrow[1],
sqlrow[2],
sqlrow[3],
sqlrow[4],
sqlrow[5],
sqlrow[6],
sqlrow[7],
sqlrow[8],
sqlrow[9],
sqlrow[10],
sqlrow[11],
sqlrow[12],
sqlrow[13],
atol(sqlrow[14]),
atol(sqlrow[15])
);
}
if(len+1 < size) {
len += snprintf(res_string + len, size - len,
"]"
"}");
}
mysql_free_result(res_ptr);
res_ptr = NULL;
}
else {
PRINTF_ERROR("mysql_use_result error : %s.\n", mysql_error(kconn));
mysql_close(kconn);
mysql_library_end();
kconn = NULL;
kconnected = 0;
ret = -1;
goto finish;
}
finish:
return ret;
}
static char * xml_log_merge_conf(ngx_conf_t *cf, void *parent, void *child) {
xml_log_conf_t *prev = parent;
xml_log_conf_t *conf = child;
ngx_open_file_t *file;
ngx_str_t *str;
ngx_conf_merge_path_value(conf->path, prev->path, "/",1,2,0,ngx_garbage_collector_temp_handler,cf);
if((&conf->path->name)->len > 1) {
conf->enable=1;
str=ngx_pcalloc(cf->pool,sizeof(ngx_str_t));
str->data=ngx_pcalloc(cf->pool,(&conf->path->name)->len+15);
(&conf->path->name)->data[(&conf->path->name)->len]=0;
ngx_snprintf(str->data,(&conf->path->name)->len+15,"%s/%d.xml.tmp",(&conf->path->name)->data,ngx_getpid());
if((conf->file=ngx_conf_open_file(cf->cycle,str)) == NULL) return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
/*
* 创建进程
*/
ngx_pid_t
ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data,
char *name, ngx_int_t respawn)
{
u_long on;
ngx_pid_t pid;
ngx_int_t s;
if (respawn >= 0) {
s = respawn;
} else {
/*在全局进程表 ngx_processes 中查找第一个空的结构，用来存放新创建的进程的信息*/
for (s = 0; s < ngx_last_process; s++) {
if (ngx_processes[s].pid == -1) {
break;
}
}
if (s == NGX_MAX_PROCESSES) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"no more than %d processes can be spawned",
NGX_MAX_PROCESSES);
return NGX_INVALID_PID;
}
}
if (respawn != NGX_PROCESS_DETACHED) {
/* Solaris 9 still has no AF_LOCAL */
/*调用 socketpair 创建一对互相连接的 unix域socket，用于进程间的全双工通信*/
if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1)
{
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"socketpair() failed while spawning \"%s\"", name);
return NGX_INVALID_PID;
}
ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
"channel %d:%d",
ngx_processes[s].channel[0],
ngx_processes[s].channel[1]);
/*将用于进程通信的 socket 设置成非阻塞的*/
if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_nonblocking_n " failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_nonblocking_n " failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
on = 1;
/*设置成信号驱动异步IO，有IO时内核发送SIGIO信号*/
if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"ioctl(FIOASYNC) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
/*设置将接受 SIGIO 和 SIGURG 信号的进程id*/
if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(F_SETOWN) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
/*当执行 exec 时关闭描述符*/
if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
/*当前子进程的描述符*/
ngx_channel = ngx_processes[s].channel[1];
} else {
ngx_processes[s].channel[0] = -1;
ngx_processes[s].channel[1] = -1;
}
/*新创建进的进程在 ngx_processes 数组中的下标*/
ngx_process_slot = s;
pid = fork();
switch (pid) {
case -1:
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fork() failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
case 0: //子进程
ngx_pid = ngx_getpid();
proc(cycle, data);
break;
default:
break;
}
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid);
/*新创建的进程放入 master 主进程的 ngx_processes 数组中*/
ngx_processes[s].pid = pid;
ngx_processes[s].exited = 0;
if (respawn >= 0) {
return pid;
}
ngx_processes[s].proc = proc;
ngx_processes[s].data = data;
ngx_processes[s].name = name;
ngx_processes[s].exiting = 0;
switch (respawn) {
case NGX_PROCESS_NORESPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_SPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_DETACHED:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 1;
break;
}
if (s == ngx_last_process) {
ngx_last_process++;
}
return pid;
}
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_int_t i;
ngx_log_t *log;
ngx_cycle_t *cycle, init_cycle;
ngx_core_conf_t *ccf;
ngx_debug_init();
if (ngx_strerror_init() != NGX_OK) { //初始化错误编号的错误字符串数组
return 1;
}
if (ngx_get_options(argc, argv) != NGX_OK) { //命令行处理
return 1;
}
//如果ngx_show_version由上面的ngx_get_options置为1
if (ngx_show_version) {
ngx_write_stderr("nginx version: " NGINX_VER_BUILD NGX_LINEFEED); //显示宏定义
if (ngx_show_help) {
ngx_write_stderr(
"Usage: nginx [-?hvVtq] [-s signal] [-c filename] "
"[-p prefix] [-g directives]" NGX_LINEFEED
NGX_LINEFEED
"Options:" NGX_LINEFEED
" -?,-h : this help" NGX_LINEFEED
" -v : show version and exit" NGX_LINEFEED
" -V : show version and configure options then exit"
NGX_LINEFEED
" -t : test configuration and exit" NGX_LINEFEED
" -q : suppress non-error messages "
"during configuration testing" NGX_LINEFEED
" -s signal : send signal to a master process: "
"stop, quit, reopen, reload" NGX_LINEFEED
#ifdef NGX_PREFIX
" -p prefix : set prefix path (default: "
NGX_PREFIX ")" NGX_LINEFEED
#else
" -p prefix : set prefix path (default: NONE)" NGX_LINEFEED
#endif
" -c filename : set configuration file (default: "
NGX_CONF_PATH ")" NGX_LINEFEED
" -g directives : set global directives out of configuration "
"file" NGX_LINEFEED NGX_LINEFEED
);
}
if (ngx_show_configure) {
#ifdef NGX_COMPILER
ngx_write_stderr("built by " NGX_COMPILER NGX_LINEFEED);
#endif
#if (NGX_SSL)
if (SSLeay() == SSLEAY_VERSION_NUMBER) {
ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
NGX_LINEFEED);
} else {
ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
" (running with ");
ngx_write_stderr((char *) (uintptr_t)
SSLeay_version(SSLEAY_VERSION));
ngx_write_stderr(")" NGX_LINEFEED);
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
ngx_write_stderr("TLS SNI support enabled" NGX_LINEFEED);
#else
ngx_write_stderr("TLS SNI support disabled" NGX_LINEFEED);
#endif
#endif
ngx_write_stderr("configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
}
if (!ngx_test_config) {
return 0;
}
}
/* TODO */ ngx_max_sockets = -1;
ngx_time_init(); //时间初始化
#if (NGX_PCRE)
ngx_regex_init();
#endif
ngx_pid = ngx_getpid(); //获得主进程pid
log = ngx_log_init(ngx_prefix); //初始化log
if (log == NULL) {
return 1;
}
/* STUB */
#if (NGX_OPENSSL)
ngx_ssl_init(log);
#endif
/*
* init_cycle->log is required for signal handlers and
* ngx_process_options()
*/
//构造一个init_cycle，旧的预处理
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle; //init_cycle是在栈中的
init_cycle.pool = ngx_create_pool(1024, log); //1K大小内存
if (init_cycle.pool == NULL) {
return 1;
}
//拷贝一份argv
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
//处理命令行选项
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_os_init(log) != NGX_OK) {
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
//从环境变量中继承一些监听描述符，用于平滑升级
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
//设置模块的编号，从0开始计数
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
cycle = ngx_init_cycle(&init_cycle); //创建新的cycle
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed",
init_cycle.conf_file.data);
}
return 1;
}
if (ngx_test_config) {
if (!ngx_quiet_mode) {
ngx_log_stderr(0, "configuration file %s test is successful",
cycle->conf_file.data);
}
return 0;
}
if (ngx_signal) { //如果要向指定的进程发送信号
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER; //以多进程方式工作
}
#if !(NGX_WIN32)
if (ngx_init_signals(cycle->log) != NGX_OK) { //初始化信号相关操作
return 1;
}
if (!ngx_inherited && ccf->daemon) {
if (ngx_daemon(cycle->log) != NGX_OK) { //以守护进程来运行
return 1;
}
ngx_daemonized = 1;
}
if (ngx_inherited) {
ngx_daemonized = 1;
}
#endif
//创建进程的pid的文件
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (ngx_log_redirect_stderr(cycle) != NGX_OK) {
return 1;
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle);
} else {
ngx_master_process_cycle(cycle); //以多进程方式运行
}
return 0;
}
//1.时间、正则、错误日志、ssl等初始化
//2.读入命令行参数
//3.OS相关初始化
//4.读入并解析配置
//5.核心模块初始化
//6.创建各种临时文件和目录
//7.创建共享内存
//8.打开listen的端口
//9.所有模块初始化
//10.启动worker进程
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_int_t i;
ngx_log_t *log;
ngx_cycle_t *cycle, init_cycle;
ngx_core_conf_t *ccf;
#if (NGX_FREEBSD)
ngx_debug_init();
#endif
if (ngx_strerror_init() != NGX_OK) {
return 1;
}
//获取参数和配置参数，比如命令是nginx -v 那么ngx_show_version就设置为1
if (ngx_get_options(argc, argv) != NGX_OK) {
return 1;
}
if (ngx_show_version) {
ngx_write_stderr("nginx version: " NGINX_VER NGX_LINEFEED);
if (ngx_show_help) {
ngx_write_stderr(
"Usage: nginx [-?hvVtq] [-s signal] [-c filename] "
"[-p prefix] [-g directives]" NGX_LINEFEED
NGX_LINEFEED
"Options:" NGX_LINEFEED
" -?,-h : this help" NGX_LINEFEED
" -v : show version and exit" NGX_LINEFEED
" -V : show version and configure options then exit"
NGX_LINEFEED
" -t : test configuration and exit" NGX_LINEFEED
" -q : suppress non-error messages "
"during configuration testing" NGX_LINEFEED
" -s signal : send signal to a master process: "
"stop, quit, reopen, reload" NGX_LINEFEED
#ifdef NGX_PREFIX
" -p prefix : set prefix path (default: "
NGX_PREFIX ")" NGX_LINEFEED
#else
" -p prefix : set prefix path (default: NONE)" NGX_LINEFEED
#endif
" -c filename : set configuration file (default: "
NGX_CONF_PATH ")" NGX_LINEFEED
" -g directives : set global directives out of configuration "
"file" NGX_LINEFEED NGX_LINEFEED
);
}
if (ngx_show_configure) {
ngx_write_stderr(
#ifdef NGX_COMPILER
"built by " NGX_COMPILER NGX_LINEFEED
#endif
#if (NGX_SSL)
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
"TLS SNI support enabled" NGX_LINEFEED
#else
"TLS SNI support disabled" NGX_LINEFEED
#endif
#endif
"configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
}
if (!ngx_test_config) {
return 0;
}
}
/* TODO */ ngx_max_sockets = -1;
//初始化nginx环境的当前时间
ngx_time_init();
#if (NGX_PCRE)
ngx_regex_init();
#endif
//master pid， 获取当前进程ID
ngx_pid = ngx_getpid();
// 初始化日志，如打开日志文件
log = ngx_log_init(ngx_prefix);
if (log == NULL) {
return 1;
}
/* STUB */
#if (NGX_OPENSSL)
ngx_ssl_init(log); //是否开启了ssl，如果开启在这里进行初始化
#endif
/*
* init_cycle->log is required for signal handlers and
* ngx_process_options()
*/
ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
// 为cycle创建一个1024B的内存池
init_cycle.pool = ngx_create_pool(1024, log);
if (init_cycle.pool == NULL) {
return 1;
}
// 保存参数到全局变量中
if (ngx_save_argv(&init_cycle, argc, argv) != NGX_OK) {
return 1;
}
// 初始化init_cycle中的一些如: conf_file，prefix，conf_prefix等字段
if (ngx_process_options(&init_cycle) != NGX_OK) {
return 1;
}
// 初始化系统相关变量，如内存页面大小ngx_pagesize,ngx_cacheline_size,最大连接数ngx_max_sockets等
if (ngx_os_init(log) != NGX_OK) { // 这个ngx_os_init在不同操作系统调用不同的函数
return 1;
}
/*
* ngx_crc32_table_init() requires ngx_cacheline_size set in ngx_os_init()
*/
// 初始化CRC表，提高效率，以后就不用计算了，直接用
if (ngx_crc32_table_init() != NGX_OK) {
return 1;
}
// 继承sockets,继承来的socket将会放到init_cycle的listening数组
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
// 计算模块个数，并且设置各个模块顺序（索引）
ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) { // 这里面的ngx_modules会有非常多的模块，[ngx_core_module,ngx_errlog_module,ngx_conf_moduel]
ngx_modules[i]->index = ngx_max_module++;
}
// 对ngx_cycle结构进行初始化,这里是nginx启动核心之处！
cycle = ngx_init_cycle(&init_cycle);
if (cycle == NULL) {
if (ngx_test_config) {
ngx_log_stderr(0, "configuration file %s test failed",
init_cycle.conf_file.data);
}
return 1;
}
if (ngx_test_config) {
if (!ngx_quiet_mode) {
ngx_log_stderr(0, "configuration file %s test is successful",
cycle->conf_file.data);
}
return 0;
}
// 检查是否有设置信号处理，如有，进入ngx_signal_process处理
if (ngx_signal) {
return ngx_signal_process(cycle, ngx_signal);
}
ngx_os_status(cycle->log);
ngx_cycle = cycle;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ccf->master && ngx_process == NGX_PROCESS_SINGLE) {
ngx_process = NGX_PROCESS_MASTER;
}
#if !(NGX_WIN32)
if (ngx_init_signals(cycle->log) != NGX_OK) {
return 1;
}
if (!ngx_inherited && ccf->daemon) {
if (ngx_daemon(cycle->log) != NGX_OK) { //如果是daemon模式，本进程变为守护进程
return 1;
}
ngx_daemonized = 1;
}
if (ngx_inherited) {
ngx_daemonized = 1;
}
#endif
// 创建进程记录文件
if (ngx_create_pidfile(&ccf->pid, cycle->log) != NGX_OK) {
return 1;
}
if (cycle->log->file->fd != ngx_stderr) {
if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
ngx_set_stderr_n " failed");
return 1;
}
}
if (log->file->fd != ngx_stderr) {
if (ngx_close_file(log->file->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_close_file_n " built-in log failed");
}
}
ngx_use_stderr = 0;
if (ngx_process == NGX_PROCESS_SINGLE) {
ngx_single_process_cycle(cycle); //单进程
} else {
ngx_master_process_cycle(cycle); //多进程，master进程进入这个，这个函数在不同操作系统有不同实现。
}
return 0;
}
//创建子进程
ngx_pid_t
ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data,
char *name, ngx_int_t respawn)
{
u_long on;
ngx_pid_t pid;
ngx_int_t s;
if (respawn >= 0) {
s = respawn;
} else {
//初始化ngx_processes数组
for (s = 0; s < ngx_last_process; s++) {
if (ngx_processes[s].pid == -1) {
break;
}
}
//进程个数不能大于NGX_MAX_PROCESSES
if (s == NGX_MAX_PROCESSES) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"no more than %d processes can be spawned",
NGX_MAX_PROCESSES);
return NGX_INVALID_PID;
}
}
if (respawn != NGX_PROCESS_DETACHED) {
/* Solaris 9 still has no AF_LOCAL */
//创建用于进程间通信的UNIX域套结字
if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1)
{
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"socketpair() failed while spawning \"%s\"", name);
return NGX_INVALID_PID;
}
ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
"channel %d:%d",
ngx_processes[s].channel[0],
ngx_processes[s].channel[1]);
//将套结字的读写端都设置为非阻塞
if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_nonblocking_n " failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_nonblocking_n " failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
on = 1;
//以下设置套结字读端为信号驱动,注意我们还没有fork子进程，设置是在master进程中
//设置FIOASYNC标志（我们必须要这样做），fcntl函数也可以设置，但大多数系统不支持，
//因此用ioctl来实现
if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"ioctl(FIOASYNC) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
//设置F_SETOWN标志，将套结字读端和master进程关联起来，当管道有数据的时侯会向该进程
//发送SIGIO信号
if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(F_SETOWN) failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
//设置管道的FD_CLOEXEC标志
if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
}
ngx_channel = ngx_processes[s].channel[1];
} else {
ngx_processes[s].channel[0] = -1;
ngx_processes[s].channel[1] = -1;
}
ngx_process_slot = s;
pid = fork();
switch (pid) {
case -1: //error
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"fork() failed while spawning \"%s\"", name);
ngx_close_channel(ngx_processes[s].channel, cycle->log);
return NGX_INVALID_PID;
case 0: //child
ngx_pid = ngx_getpid();
//执行我们传递的子进程执行函数
proc(cycle, data);
break;
default: //father
break;
}
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid);
ngx_processes[s].pid = pid;
ngx_processes[s].exited = 0;
if (respawn >= 0) {
return pid;
}
ngx_processes[s].proc = proc; //设置子进程的执行函数
ngx_processes[s].data = data; //设置子进程的参数
ngx_processes[s].name = name; //设置子进程的name
ngx_processes[s].exiting = 0;
switch (respawn) {
case NGX_PROCESS_NORESPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_SPAWN:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_JUST_RESPAWN:
ngx_processes[s].respawn = 1;
ngx_processes[s].just_spawn = 1;
ngx_processes[s].detached = 0;
break;
case NGX_PROCESS_DETACHED:
ngx_processes[s].respawn = 0;
ngx_processes[s].just_spawn = 0;
ngx_processes[s].detached = 1;
break;
}
if (s == ngx_last_process) {
ngx_last_process++; //last_proces可以视为子进程个数
}
return pid;
}
