源代码：
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_debug_init();
ngx_linux_config.h文件中定义:
#define NGX_HAVE_OS_SPECIFIC_INIT 1
#define ngx_debug_init()
其实什么也没做。
ngx_strerror_init();//初始化了*ngx_sys_errlist 这个全局静态变量，以供ngx_strerror使用
static ngx_str_t *ngx_sys_errlist; static ngx_str_t ngx_unknown_error = ngx_string("Unknown error"); u_char * ngx_strerror(ngx_err_t err, u_char *errstr, size_t size) { ngx_str_t *msg; msg = ((ngx_uint_t) err < NGX_SYS_NERR) ? &ngx_sys_errlist[err]: &ngx_unknown_error; size = ngx_min(size, msg->len); return ngx_cpymem(errstr, msg->data, size); }
ngx_get_options(argc, argv);//设置命令行参数
static ngx_int_t ngx_get_options(int argc, char *const *argv) { u_char *p; ngx_int_t i; for (i = 1; i < argc; i++) { p = (u_char *) argv[i]; if (*p++ != '-') { ngx_log_stderr(0, "invalid option: "%s"", argv[i]); return NGX_ERROR; } while (*p) { switch (*p++) { case '?': case 'h': ngx_show_version = 1; ngx_show_help = 1; break; case 'v': ngx_show_version = 1; break; case 'V': ngx_show_version = 1; ngx_show_configure = 1; break; case 't': ngx_test_config = 1; break; case 'q': ngx_quiet_mode = 1; break; case 'p': if (*p) { ngx_prefix = p; goto next; } if (argv[++i]) { ngx_prefix = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-p" requires directory name"); return NGX_ERROR; case 'c': if (*p) { ngx_conf_file = p; goto next; } if (argv[++i]) { ngx_conf_file = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-c" requires file name"); return NGX_ERROR; case 'g': if (*p) { ngx_conf_params = p; goto next; } if (argv[++i]) { ngx_conf_params = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-g" requires parameter"); return NGX_ERROR; break; case 'V': ngx_show_version = 1; ngx_show_configure = 1; break; case 't': ngx_test_config = 1; break; case 'q': ngx_quiet_mode = 1; break; case 'p': if (*p) { ngx_prefix = p; goto next; } if (argv[++i]) { ngx_prefix = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-p" requires directory name"); return NGX_ERROR; case 'c': if (*p) { ngx_conf_file = p; goto next; } if (argv[++i]) { ngx_conf_file = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-c" requires file name"); return NGX_ERROR; case 'g': if (*p) { ngx_conf_params = p; goto next; } if (argv[++i]) { ngx_conf_params = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-g" requires parameter"); return NGX_ERROR; case 's': if (*p) { if (argv[++i]) { ngx_conf_params = (u_char *) argv[i]; goto next; } ngx_log_stderr(0, "option "-g" requires parameter"); return NGX_ERROR; case 's': if (*p) { ngx_signal = (char *) p; } else if (argv[++i]) { ngx_signal = argv[i]; } else { ngx_log_stderr(0, "option "-s" requires parameter"); return NGX_ERROR; } if (ngx_strcmp(ngx_signal, "stop") == 0 || ngx_strcmp(ngx_signal, "quit") == 0 || ngx_strcmp(ngx_signal, "reopen") == 0 || ngx_strcmp(ngx_signal, "reload") == 0) { ngx_process = NGX_PROCESS_SIGNALLER; goto next; } ngx_log_stderr(0, "invalid option: "-s %s"", ngx_signal); return NGX_ERROR; default: ngx_log_stderr(0, "invalid option: "%c"", *(p - 1)); return NGX_ERROR; } } next: continue; } return NGX_OK; }
ngx_max_sockets = -1
ngx_time_init();
void ngx_time_init(void) { ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1; ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1; ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1; ngx_cached_http_log_iso8601.len = sizeof("1970-09-28T12:00:00+06:00") - 1; ngx_cached_time = &cached_time[0]; ngx_time_update(); }
log = ngx_log_init(ngx_prefix);
ngx_log_file.fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN, NGX_FILE_DEFAULT_ACCESS); if (ngx_log_file.fd == NGX_INVALID_FILE) { ngx_log_stderr(ngx_errno, "[alert] could not open error log file: " ngx_open_file_n " "%s" failed", name); #if (NGX_WIN32) ngx_event_log(ngx_errno, "could not open error log file: " ngx_open_file_n " "%s" failed", name); #endif ngx_log_file.fd = ngx_stderr; }
if (ngx_os_init(log) != NGX_OK) { return 1; }
ngx_int_t ngx_os_init(ngx_log_t *log) { ngx_uint_t n; #if (NGX_HAVE_OS_SPECIFIC_INIT) if (ngx_os_specific_init(log) != NGX_OK) { return NGX_ERROR; } #endif ngx_init_setproctitle(log); ngx_pagesize = getpagesize(); ngx_cacheline_size = NGX_CPU_CACHE_LINE; for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ } #if (NGX_HAVE_SC_NPROCESSORS_ONLN) if (ngx_ncpu == 0) { ngx_ncpu = sysconf(_SC_NPROCESSORS_ONLN); } #endif if (ngx_ncpu < 1) { ngx_ncpu = 1; } ngx_cpuinfo(); if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) { ngx_log_error(NGX_LOG_ALERT, log, errno, "getrlimit(RLIMIT_NOFILE) failed)"); return NGX_ERROR; } ngx_max_sockets = (ngx_int_t) rlmt.rlim_cur; //最大打开文件数 #if (NGX_HAVE_INHERITED_NONBLOCK || NGX_HAVE_ACCEPT4) ngx_inherited_nonblocking = 1; #else ngx_inherited_nonblocking = 0; #endif srandom(ngx_time()); return NGX_OK; }
cycle = ngx_init_cycle(&init_cycle);
#ifndef NGX_CYCLE_POOL_SIZE #define NGX_CYCLE_POOL_SIZE NGX_DEFAULT_POOL_SIZE #endif #define NGX_MAX_ALLOC_FROM_POOL (ngx_pagesize - 1) #define NGX_DEFAULT_POOL_SIZE (16 * 1024) #define NGX_POOL_ALIGNMENT 16 #define NGX_MIN_POOL_SIZE ngx_align((sizeof(ngx_pool_t) + 2 * sizeof(ngx_pool_large_t)), NGX_POOL_ALIGNMENT)
ngx_init_cycle()分析
初始化过程如下。
- 调用ngx_timezone_update()更新时区，调用ngx_time_update()更新时间
- 创建大小为NGX_CYCLE_POOL_SIZE=16384B的内存池，并从中分配ngx_cycle_t结构
- 简单初始化，如记录pool指针、log指针
- 初始化配置前缀、前缀、配置文件、配置参数等字符串
- 初始化pathes数组
- 初始化open_files链表
- 初始化shared_memory链表
- 初始化listening数组
- 初始化resuable_connections_queue队列
- 从pool为conf_ctx分配空间
- 初始化hostname字符串
- 调用core模块的create_conf()
- 配置文件解析
- 调用core模块的init_conf()
- 遍历open_files链表中的每一个文件并打开
- 创建共享内存并初始化(新旧shared_memory链表的比较，相同的共享内存保留，旧的不同的共享内存被释放，新的被创建)
- (尝试5遍)遍历listening数组并打开所有侦听sockets(socket()->setsockopt()->bind()->listen())
- 提交新的cycle配置，并调用所有模块的init_module(实际上只有ngx_event_core_module模块定义了该callback，即只有ngx_event_module_init()被调用)
- 关闭或删除残留在old_cycle中的资源
- 释放多余的共享内存
- 关闭多余的侦听sockets
- 关闭多余的打开文件
struct ngx_listening_s { ngx_socket_t fd; struct sockaddr *sockaddr; socklen_t socklen; /* size of sockaddr */ size_t addr_text_max_len; ngx_str_t addr_text; int type; int backlog; int rcvbuf; int sndbuf; #if (NGX_HAVE_KEEPALIVE_TUNABLE) int keepidle; int keepintvl; int keepcnt; #endif /* handler of accepted connection */ ngx_connection_handler_pt handler; void *servers; /* array of ngx_http_in_addr_t, for example */ ngx_log_t log; ngx_log_t *logp; size_t pool_size; /* should be here because of the AcceptEx() preread */ size_t post_accept_buffer_size; /* should be here because of the deferred accept */ ngx_msec_t post_accept_timeout; /* should be here because of the AcceptEx() preread */ size_t post_accept_buffer_size; size_t post_accept_buffer_size; /* should be here because of the deferred accept */ ngx_msec_t post_accept_timeout; ngx_listening_t *previous; ngx_connection_t *connection; unsigned open:1; unsigned remain:1; unsigned ignore:1; unsigned bound:1; /* already bound */ unsigned inherited:1; /* inherited from previous process */ unsigned nonblocking_accept:1; unsigned listen:1; unsigned nonblocking:1; unsigned shared:1; /* shared between threads or processes */ unsigned addr_ntop:1; #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) unsigned ipv6only:1; #endif unsigned keepalive:2; #if (NGX_HAVE_DEFERRED_ACCEPT) unsigned deferred_accept:1; unsigned delete_deferred:1; unsigned add_deferred:1; #ifdef SO_ACCEPTFILTER char *accept_filter; #endif #endif #if (NGX_HAVE_SETFIB) int setfib; #endif };
p *ngx_cycle $10 = { conf_ctx = 0x6a1d10, pool = 0x6a0f30, log = 0x6a0f98, new_log = { log_level = 256, file = 0x6a11d8, connection = 0, handler = 0, data = 0x0, action = 0x0 }, files = 0x0, free_connections = 0x0, free_connection_n = 0, reusable_connections_queue = { prev = 0x6a0fe0, next = 0x6a0fe0 }, listening = { elts = 0x6a1540, nelts = 1, size = 200, nalloc = 10, pool = 0x6a0f30 }, paths = { elts = 0x6a1188, nelts = 5, size = 8, nalloc = 10, pool = 0x6a0f30 }, open_files = { last = 0x6a1048, part = { elts = 0x6a11d8, ---Type <return> to continue, or q <return> to quit--- nelts = 3, next = 0x0 }, size = 40, nalloc = 20, pool = 0x6a0f30 }, shared_memory = { last = 0x6a1080, part = { elts = 0x6a14f8, nelts = 0, next = 0x0 }, size = 72, nalloc = 1, pool = 0x6a0f30 }, connection_n = 1024, files_n = 0, connections = 0x0, read_events = 0x0, write_events = 0x0, old_cycle = 0x0, conf_file = { len = 32, data = 0x6a1167 "/usr/local/nginx/conf/nginx.conf" }, conf_param = { len = 0, data = 0x6a1188 "370 30l" }, conf_prefix = { len = 22, data = 0x6a1140 "/usr/local/nginx/conf//usr/local/nginx//usr/local/nginx/conf/nginx.conf" }, prefix = { ---Type <return> to continue, or q <return> to quit--- len = 17, data = 0x6a1156 "/usr/local/nginx//usr/local/nginx/conf/nginx.conf" }, lock_file = { len = 33, data = 0x6c60a0 "/usr/local/nginx/logs/nginx.lock.accept" }, hostname = { len = 6, data = 0x6a1e88 "centos" } }
typedef struct { int signo; char *signame; char *name; void (*handler)(int signo); } ngx_signal_t;
if (!ngx_inherited && ccf->daemon) { if (ngx_daemon(cycle->log) != NGX_OK) { return 1; } ngx_daemonized = 1; }
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_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;
}
if (ngx_process == NGX_PROCESS_SINGLE) { ngx_single_process_cycle(cycle); } else { ngx_master_process_cycle(cycle); } return 0;
void ngx_master_process_cycle(ngx_cycle_t *cycle) { char *title; u_char *p; size_t size; ngx_int_t i; ngx_uint_t n, sigio; sigset_t set; struct itimerval itv; ngx_uint_t live; ngx_msec_t delay; ngx_listening_t *ls; ngx_core_conf_t *ccf; sigemptyset(&set); sigaddset(&set, SIGCHLD); sigaddset(&set, SIGALRM); sigaddset(&set, SIGIO); sigaddset(&set, SIGINT); sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "sigprocmask() failed"); } sigemptyset(&set); size = sizeof(master_process); for (i = 0; i < ngx_argc; i++) { sigaddset(&set, SIGIO); sigaddset(&set, SIGINT); sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "sigprocmask() failed"); } sigemptyset(&set); size = sizeof(master_process); for (i = 0; i < ngx_argc; i++) { size += ngx_strlen(ngx_argv[i]) + 1; } title = ngx_pnalloc(cycle->pool, size); p = ngx_cpymem(title, master_process, sizeof(master_process) - 1); for (i = 0; i < ngx_argc; i++) { *p++ = ' '; p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size); } ngx_setproctitle(title); ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); ngx_start_worker_processes(cycle, ccf->worker_processes, NGX_PROCESS_RESPAWN); ngx_start_cache_manager_processes(cycle, 0); ngx_new_binary = 0; delay = 0; sigio = 0; live = 1; for ( ;; ) { if (delay) { if (ngx_sigalrm) { sigio = 0; delay *= 2; ngx_sigalrm = 0; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "termination cycle: %d", delay); itv.it_interval.tv_sec = 0; itv.it_interval.tv_usec = 0; itv.it_value.tv_sec = delay / 1000; itv.it_value.tv_usec = (delay % 1000 ) * 1000; if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "setitimer() failed"); } } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend"); sigsuspend(&set); ngx_time_update(); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up, sigio %i", sigio); if (ngx_reap) { ngx_reap = 0; ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap children"); live = ngx_reap_children(cycle); } if (!live && (ngx_terminate || ngx_quit)) { ngx_master_process_exit(cycle); } if (ngx_terminate) { if (delay == 0) { delay = 50; } if (sigio) { sigio--; continue; } sigio = ccf->worker_processes + 2 /* cache processes */; if (delay > 1000) { ngx_signal_worker_processes(cycle, SIGKILL); } else { ngx_signal_worker_processes(cycle, ngx_signal_value(NGX_TERMINATE_SIGNAL)); } continue; } if (ngx_quit) { ngx_signal_worker_processes(cycle, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); ls = cycle->listening.elts; for (n = 0; n < cycle->listening.nelts; n++) { if (ngx_close_socket(ls[n].fd) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, ngx_close_socket_n " %V failed", &ls[n].addr_text); } } cycle->listening.nelts = 0; continue; } if (ngx_reconfigure) { ngx_reconfigure = 0; if (ngx_new_binary) { ngx_start_worker_processes(cycle, ccf->worker_processes, NGX_PROCESS_RESPAWN); ngx_start_cache_manager_processes(cycle, 0); ngx_noaccepting = 0; continue; } ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring"); cycle = ngx_init_cycle(cycle); if (cycle == NULL) { cycle = (ngx_cycle_t *) ngx_cycle; continue; } ngx_cycle = cycle; ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); ngx_start_worker_processes(cycle, ccf->worker_processes, NGX_PROCESS_JUST_RESPAWN); ngx_start_cache_manager_processes(cycle, 1); /* allow new processes to start */ ngx_msleep(100); live = 1; ngx_signal_worker_processes(cycle, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); ngx_msleep(100); live = 1; ngx_signal_worker_processes(cycle, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); } if (ngx_restart) { ngx_restart = 0; ngx_start_worker_processes(cycle, ccf->worker_processes, NGX_PROCESS_RESPAWN); ngx_start_cache_manager_processes(cycle, 0); live = 1; } if (ngx_reopen) { ngx_reopen = 0; ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); ngx_reopen_files(cycle, ccf->user); ngx_signal_worker_processes(cycle, ngx_signal_value(NGX_REOPEN_SIGNAL)); } if (ngx_change_binary) { ngx_change_binary = 0; ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "changing binary"); ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv); } if (ngx_noaccept) { ngx_noaccept = 0; ngx_noaccepting = 1; ngx_signal_worker_processes(cycle, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); } } }
static voidngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, ngx_int_t type) { ngx_int_t i; ngx_channel_t ch; ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start worker processes"); ch.command = NGX_CMD_OPEN_CHANNEL; for (i = 0; i < n; i++) { ngx_spawn_process(cycle, ngx_worker_process_cycle, (void *) (intptr_t) i, "worker process", type); ch.pid = ngx_processes[ngx_process_slot].pid; ch.slot = ngx_process_slot; ch.fd = ngx_processes[ngx_process_slot].channel[0]; ngx_pass_open_channel(cycle, &ch); } }