| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| |
| #include <nginx.h> |
| |
| |
| static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx); |
| static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data); |
| #if (NGX_THREADS) |
| static int ngx_worker_thread_cycle(void *data); |
| #endif |
| |
| |
| ngx_int_t ngx_process; |
| ngx_pid_t ngx_pid; |
| ngx_pid_t ngx_new_binary; |
| ngx_int_t ngx_inherited; |
| ngx_int_t ngx_threaded; |
| |
| sig_atomic_t ngx_reap; |
| sig_atomic_t ngx_timer; |
| sig_atomic_t ngx_terminate; |
| sig_atomic_t ngx_quit; |
| sig_atomic_t ngx_noaccept; |
| sig_atomic_t ngx_reconfigure; |
| sig_atomic_t ngx_reopen; |
| sig_atomic_t ngx_change_binary; |
| |
| |
| /* TODO: broken NGX_PROCESS_SINGLE */ |
| |
| void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) |
| { |
| int signo; |
| sigset_t set; |
| struct timeval tv; |
| struct itimerval itv; |
| ngx_uint_t i, live; |
| ngx_msec_t delay; |
| ngx_core_conf_t *ccf; |
| |
| if (ngx_process == NGX_PROCESS_MASTER) { |
| sigemptyset(&set); |
| sigaddset(&set, SIGCHLD); |
| sigaddset(&set, SIGALRM); |
| 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); |
| } |
| |
| ngx_setproctitle("master process"); |
| |
| ngx_new_binary = 0; |
| delay = 0; |
| signo = 0; |
| live = 0; |
| |
| for ( ;; ) { |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "new cycle"); |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, |
| ngx_core_module); |
| |
| if (ccf->worker_processes == NGX_CONF_UNSET) { |
| ccf->worker_processes = 1; |
| } |
| |
| if (ngx_process == NGX_PROCESS_MASTER) { |
| for (i = 0; i < (ngx_uint_t) ccf->worker_processes; i++) { |
| ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL, |
| "worker process", NGX_PROCESS_RESPAWN); |
| } |
| |
| /* |
| * we have to limit the maximum life time of the worker processes |
| * by 1 month because our millisecond event timer is limited |
| * by 49 days on 32-bit platforms |
| */ |
| |
| itv.it_interval.tv_sec = 0; |
| itv.it_interval.tv_usec = 0; |
| itv.it_value.tv_sec = 30 * 24 * 60 * 60; |
| itv.it_value.tv_usec = 0; |
| |
| if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setitimer() failed"); |
| } |
| |
| live = 1; |
| |
| } else { |
| ngx_init_temp_number(); |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->init_process) { |
| if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| } |
| } |
| |
| |
| /* a cycle with the same configuration because a new one is invalid */ |
| |
| for ( ;; ) { |
| |
| /* an event loop */ |
| |
| for ( ;; ) { |
| |
| if (ngx_process == NGX_PROCESS_MASTER) { |
| if (delay) { |
| delay *= 2; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "temination 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_gettimeofday(&tv); |
| ngx_time_update(tv.tv_sec); |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "wake up"); |
| |
| } else { /* NGX_PROCESS_SINGLE */ |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "worker cycle"); |
| |
| ngx_process_events(cycle); |
| live = 0; |
| } |
| |
| if (ngx_reap) { |
| ngx_reap = 0; |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "reap childs"); |
| |
| live = 0; |
| for (i = 0; i < ngx_last_process; i++) { |
| |
| ngx_log_debug5(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "child: " PID_T_FMT |
| " e:%d t:%d d:%d r:%d", |
| ngx_processes[i].pid, |
| ngx_processes[i].exiting, |
| ngx_processes[i].exited, |
| ngx_processes[i].detached, |
| ngx_processes[i].respawn); |
| |
| if (ngx_processes[i].exited) { |
| |
| if (ngx_processes[i].respawn |
| && !ngx_processes[i].exiting |
| && !ngx_terminate |
| && !ngx_quit) |
| { |
| if (ngx_spawn_process(cycle, |
| ngx_processes[i].proc, |
| ngx_processes[i].data, |
| ngx_processes[i].name, i) |
| == NGX_ERROR) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "can not respawn %s", |
| ngx_processes[i].name); |
| continue; |
| } |
| |
| live = 1; |
| |
| continue; |
| } |
| |
| if (ngx_processes[i].pid == ngx_new_binary) { |
| ngx_new_binary = 0; |
| |
| /* TODO: if (ngx_noaccept) ngx_configure = 1 */ |
| } |
| |
| if (i != --ngx_last_process) { |
| ngx_processes[i--] = |
| ngx_processes[ngx_last_process]; |
| } |
| |
| } else if (ngx_processes[i].exiting |
| || !ngx_processes[i].detached) |
| { |
| live = 1; |
| } |
| } |
| } |
| |
| if (!live && (ngx_terminate || ngx_quit)) { |
| ngx_master_exit(cycle, ctx); |
| } |
| |
| if (ngx_terminate) { |
| if (delay == 0) { |
| delay = 50; |
| } |
| |
| if (delay > 1000) { |
| signo = SIGKILL; |
| } else { |
| signo = ngx_signal_value(NGX_TERMINATE_SIGNAL); |
| } |
| |
| } else if (ngx_quit) { |
| signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); |
| |
| } else if (ngx_timer) { |
| signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); |
| |
| } else { |
| |
| if (ngx_noaccept) { |
| signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); |
| } |
| |
| if (ngx_change_binary) { |
| ngx_change_binary = 0; |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
| "changing binary"); |
| ngx_new_binary = ngx_exec_new_binary(cycle, ctx->argv); |
| } |
| |
| if (ngx_reconfigure) { |
| signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
| "reconfiguring"); |
| } |
| |
| if (ngx_reopen) { |
| if (ngx_process == NGX_PROCESS_MASTER) { |
| signo = ngx_signal_value(NGX_REOPEN_SIGNAL); |
| ngx_reopen = 0; |
| |
| } else { /* NGX_PROCESS_SINGLE */ |
| ngx_reopen = 0; |
| } |
| |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
| "reopening logs"); |
| ngx_reopen_files(cycle, ccf->user); |
| } |
| } |
| |
| if (signo) { |
| for (i = 0; i < ngx_last_process; i++) { |
| |
| if (ngx_processes[i].detached) { |
| continue; |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "kill (" PID_T_FMT ", %d)" , |
| ngx_processes[i].pid, signo); |
| |
| if (kill(ngx_processes[i].pid, signo) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "kill(%d, %d) failed", |
| ngx_processes[i].pid, signo); |
| continue; |
| } |
| |
| if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { |
| ngx_processes[i].exiting = 1; |
| } |
| } |
| |
| signo = 0; |
| } |
| |
| if (ngx_reopen || ngx_reconfigure || ngx_timer) { |
| break; |
| } |
| } |
| |
| if (ngx_reopen) { |
| ngx_reopen = 0; |
| |
| } else if (ngx_timer) { |
| ngx_timer = 0; |
| |
| } else if (ngx_noaccept) { |
| ngx_noaccept = 0; |
| ngx_reconfigure = 0; |
| |
| } else { |
| cycle = ngx_init_cycle(cycle); |
| if (cycle == NULL) { |
| cycle = (ngx_cycle_t *) ngx_cycle; |
| continue; |
| } |
| |
| ngx_cycle = cycle; |
| ngx_reconfigure = 0; |
| } |
| |
| break; |
| } |
| } |
| } |
| |
| |
| static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) |
| { |
| u_char *name; |
| |
| if (ngx_inherited && getppid() > 1) { |
| name = ctx->pid.name.data; |
| |
| } else { |
| name = ctx->name; |
| } |
| |
| if (ngx_delete_file(name) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| ngx_delete_file_n " \"%s\" failed", name); |
| } |
| |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exit"); |
| exit(0); |
| } |
| |
| |
| static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data) |
| { |
| sigset_t set; |
| ngx_uint_t i; |
| ngx_listening_t *ls; |
| ngx_core_conf_t *ccf; |
| #if (NGX_THREADS) |
| ngx_tid_t tid; |
| #endif |
| |
| ngx_process = NGX_PROCESS_WORKER; |
| ngx_last_process = 0; |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| if (ccf->group != (gid_t) NGX_CONF_UNSET) { |
| if (setuid(ccf->group) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "setgid(%d) failed", ccf->group); |
| /* fatal */ |
| exit(2); |
| } |
| } |
| |
| if (ccf->user != (uid_t) NGX_CONF_UNSET && geteuid() == 0) { |
| if (setuid(ccf->user) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "setuid(%d) failed", ccf->user); |
| /* fatal */ |
| exit(2); |
| } |
| } |
| |
| #if (HAVE_PR_SET_DUMPABLE) |
| |
| /* allow coredump after setuid() in Linux 2.4.x */ |
| |
| if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "prctl(PR_SET_DUMPABLE) failed"); |
| } |
| |
| #endif |
| |
| sigemptyset(&set); |
| |
| if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "sigprocmask() failed"); |
| } |
| |
| ngx_init_temp_number(); |
| |
| /* |
| * disable deleting previous events for the listening sockets because |
| * in the worker processes there are no events at all at this point |
| */ |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| ls[i].remain = 0; |
| } |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->init_process) { |
| if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| } |
| |
| ngx_setproctitle("worker process"); |
| |
| #if (NGX_THREADS) |
| |
| if (ngx_init_threads(5, 128 * 1024 * 1024, cycle) == NGX_ERROR) { |
| /* fatal */ |
| exit(2); |
| } |
| |
| for (i = 0; i < 1; i++) { |
| if (ngx_create_thread(&tid, ngx_worker_thread_cycle, |
| cycle, cycle->log) != 0) |
| { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| |
| #endif |
| |
| for ( ;; ) { |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); |
| |
| ngx_process_events(cycle); |
| |
| if (ngx_terminate) { |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting"); |
| exit(0); |
| } |
| |
| if (ngx_quit) { |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
| "gracefully shutting down"); |
| ngx_setproctitle("worker process is shutting down"); |
| break; |
| } |
| |
| if (ngx_reopen) { |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs"); |
| ngx_reopen_files(cycle, -1); |
| ngx_reopen = 0; |
| } |
| } |
| |
| ngx_close_listening_sockets(cycle); |
| |
| for ( ;; ) { |
| if (ngx_event_timer_rbtree == &ngx_event_timer_sentinel) { |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting"); |
| exit(0); |
| } |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); |
| |
| ngx_process_events(cycle); |
| |
| if (ngx_reopen) { |
| ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs"); |
| ngx_reopen_files(cycle, -1); |
| ngx_reopen = 0; |
| } |
| } |
| } |
| |
| |
| #if (NGX_THREADS) |
| |
| int ngx_worker_thread_cycle(void *data) |
| { |
| ngx_cycle_t *cycle = data; |
| |
| ngx_err_t err; |
| sigset_t set; |
| struct timeval tv; |
| |
| sigfillset(&set); |
| sigdelset(&set, SIGALRM); |
| sigdelset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL)); |
| sigdelset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); |
| |
| err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL); |
| if (err) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, err, |
| ngx_thread_sigmask_n " failed"); |
| return 1; |
| } |
| |
| |
| /* STUB */ |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, ngx_errno, |
| "thread %d started", ngx_thread_self()); |
| |
| ngx_setproctitle("worker thread"); |
| |
| sleep(5); |
| |
| ngx_gettimeofday(&tv); |
| ngx_time_update(tv.tv_sec); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, ngx_errno, |
| "thread %d done", ngx_thread_self()); |
| |
| return 1; |
| } |
| |
| #endif |
| |
| |
| static ngx_int_t ngx_create_pid_file(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) |
| { |
| size_t len; |
| u_char pid[NGX_INT64_LEN + 1]; |
| ngx_core_conf_t *ccf; |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| if (ccf->pid.len == 0) { |
| ccf->pid.len = sizeof(NGINX_PID) - 1; |
| ccf->pid.data = NGINX_PID; |
| ccf->newpid.len = sizeof(NGINX_NEW_PID) - 1; |
| ccf->newpid.data = NGINX_NEW_PID; |
| |
| } else { |
| ccf->newpid.len = ccf->pid.len + sizeof(NGINX_NEW_PID_EXT); |
| if (!(ccf->newpid.data = ngx_alloc(ccf->newpid.len, cycle->log))) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memcpy(ngx_cpymem(ccf->newpid.data, ccf->pid.data, ccf->pid.len), |
| NGINX_NEW_PID_EXT, sizeof(NGINX_NEW_PID_EXT)); |
| } |
| |
| len = ngx_snprintf((char *) pid, /* STUB */ 10, PID_T_FMT, ngx_getpid()); |
| ngx_memzero(&ctx->pid, sizeof(ngx_file_t)); |
| ctx->pid.name = ngx_inherited ? ccf->newpid : ccf->pid; |
| ctx->name = ccf->pid.data; |
| |
| ctx->pid.fd = ngx_open_file(ctx->pid.name.data, NGX_FILE_RDWR, |
| NGX_FILE_CREATE_OR_OPEN); |
| |
| if (ctx->pid.fd == NGX_INVALID_FILE) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| ngx_open_file_n " \"%s\" failed", ctx->pid.name.data); |
| return NGX_ERROR; |
| } |
| |
| if (ngx_write_file(&ctx->pid, pid, len, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| if (ngx_close_file(ctx->pid.fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", ctx->pid.name.data); |
| } |
| |
| return NGX_OK; |
| } |
