Mercurial > hg > nginx-quic
view src/core/nginx.c @ 273:34329e143004
nginx-0.0.2-2004-03-01-19:45:48 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 01 Mar 2004 16:45:48 +0000 |
parents | 7bb9562216ce |
children | 0ba4821f4460 |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <nginx.h> typedef struct { ngx_flag_t daemon; ngx_flag_t master; ngx_flag_t worker_reopen; uid_t user; gid_t group; ngx_str_t pid; ngx_str_t newpid; } ngx_core_conf_t; typedef struct { ngx_file_t pid; char *name; int argc; char *const *argv; } ngx_master_ctx_t; static void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx); 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 static ngx_int_t ngx_add_inherited_sockets(ngx_cycle_t *cycle, char **envp); static ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv); static ngx_int_t ngx_getopt(ngx_master_ctx_t *ctx, ngx_cycle_t *cycle); static ngx_int_t ngx_core_module_init(ngx_cycle_t *cycle); static char *ngx_set_user(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_str_t core_name = ngx_string("core"); static ngx_command_t ngx_core_commands[] = { { ngx_string("user"), NGX_MAIN_CONF|NGX_CONF_TAKE12, ngx_set_user, 0, 0, NULL }, { ngx_string("daemon"), NGX_MAIN_CONF|NGX_CONF_TAKE1, ngx_conf_set_core_flag_slot, 0, offsetof(ngx_core_conf_t, daemon), NULL }, { ngx_string("master_process"), NGX_MAIN_CONF|NGX_CONF_TAKE1, ngx_conf_set_core_flag_slot, 0, offsetof(ngx_core_conf_t, master), NULL }, { ngx_string("pid"), NGX_MAIN_CONF|NGX_CONF_TAKE1, ngx_conf_set_core_str_slot, 0, offsetof(ngx_core_conf_t, pid), NULL }, { ngx_string("worker_reopen"), NGX_MAIN_CONF|NGX_CONF_TAKE1, ngx_conf_set_core_flag_slot, 0, offsetof(ngx_core_conf_t, worker_reopen), NULL }, ngx_null_command }; ngx_module_t ngx_core_module = { NGX_MODULE, &core_name, /* module context */ ngx_core_commands, /* module directives */ NGX_CORE_MODULE, /* module type */ ngx_core_module_init, /* init module */ NULL /* init child */ }; ngx_int_t ngx_max_module; ngx_atomic_t ngx_connection_counter; 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_reap; ngx_int_t ngx_timer; ngx_int_t ngx_terminate; ngx_int_t ngx_quit; ngx_int_t ngx_noaccept; ngx_int_t ngx_reconfigure; ngx_int_t ngx_reopen; ngx_int_t ngx_change_binary; int main(int argc, char *const *argv, char **envp) { ngx_fd_t fd; ngx_int_t i; ngx_log_t *log; ngx_cycle_t *cycle, init_cycle; ngx_open_file_t *file; ngx_core_conf_t *ccf; ngx_master_ctx_t ctx; #if !(WIN32) size_t len; char pid[/* STUB */ 10]; #endif #if __FreeBSD__ ngx_debug_init(); #endif /* TODO */ ngx_max_sockets = -1; ngx_time_init(); #if (HAVE_PCRE) ngx_regex_init(); #endif log = ngx_log_init_errlog(); ngx_pid = ngx_getpid(); /* init_cycle->log is required for signal handlers and ngx_getopt() */ ngx_memzero(&init_cycle, sizeof(ngx_cycle_t)); init_cycle.log = log; ngx_cycle = &init_cycle; ngx_memzero(&ctx, sizeof(ngx_master_ctx_t)); ctx.argc = argc; ctx.argv = argv; #if (NGX_THREADS) if (ngx_time_mutex_init(log) == NGX_ERROR) { return 1; } #endif if (ngx_getopt(&ctx, &init_cycle) == NGX_ERROR) { return 1; } if (ngx_os_init(log) == NGX_ERROR) { return 1; } ngx_max_module = 0; for (i = 0; ngx_modules[i]; i++) { ngx_modules[i]->index = ngx_max_module++; } if (!(init_cycle.pool = ngx_create_pool(1024, log))) { return 1; } if (ngx_add_inherited_sockets(&init_cycle, envp) == NGX_ERROR) { return 1; } cycle = ngx_init_cycle(&init_cycle); if (cycle == NULL) { return 1; } ngx_cycle = cycle; ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); ngx_process = (ccf->master != 0) ? NGX_PROCESS_MASTER : NGX_PROCESS_SINGLE; #if (WIN32) #if 0 if (run_as_service) { if (ngx_servie(cycle->log) == NGX_ERROR) { return 1; } return 0; } #endif #else if (!ngx_inherited && ccf->daemon != 0) { if (ngx_daemon(cycle->log) == NGX_ERROR) { return 1; } } 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 1; } 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(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 1; } if (ngx_write_file(&ctx.pid, pid, len, 0) == NGX_ERROR) { return 1; } 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); } #endif ngx_master_process_cycle(cycle, &ctx); return 0; } /* TODO: broken NGX_PROCESS_SINGLE */ static 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; 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"); if (ngx_process == NGX_PROCESS_MASTER) { 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(1); } } } } ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); /* 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->log); 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) { if (ccf->worker_reopen != 0) { signo = ngx_signal_value(NGX_REOPEN_SIGNAL); ngx_reopen = 0; } else if (ngx_noaccept) { ngx_reopen = 0; } else { signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); } } else { /* NGX_PROCESS_SINGLE */ ngx_reopen = 0; } ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs"); ngx_reopen_files(cycle, ccf->worker_reopen != 0 ? ccf->user : (uid_t) -1); } } 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) { 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_int_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(1); } } } ngx_setproctitle("worker process"); #if (NGX_THREADS) if (ngx_init_threads(5, 128 * 1024 * 1024, cycle) == NGX_ERROR) { /* fatal */ exit(1); } for (i = 0; i < 1; i++) { if (ngx_create_thread(&tid, ngx_worker_thread_cycle, cycle, cycle->log) != 0) { /* fatal */ exit(1); } } #endif for ( ;; ) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); ngx_process_events(cycle->log); 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->log); 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; struct timeval tv; /* 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_add_inherited_sockets(ngx_cycle_t *cycle, char **envp) { char *p, *v; ngx_socket_t s; ngx_listening_t *ls; for ( /* void */ ; *envp; envp++) { if (ngx_strncmp(*envp, NGINX_VAR, NGINX_VAR_LEN) != 0) { continue; } ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "using inherited sockets from \"%s\"", *envp); ngx_init_array(cycle->listening, cycle->pool, 10, sizeof(ngx_listening_t), NGX_ERROR); for (p = *envp + NGINX_VAR_LEN, v = p; *p; p++) { if (*p == ':' || *p == ';') { s = ngx_atoi(v, p - v); if (s == NGX_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "invalid socket number \"%s\" " "in NGINX enviroment variable, " "ignoring the rest of the variable", v); break; } v = p + 1; if (!(ls = ngx_push_array(&cycle->listening))) { return NGX_ERROR; } ls->fd = s; } } ngx_inherited = 1; return ngx_set_inherited_sockets(cycle); } return NGX_OK; } static ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv) { char *env[2], *var, *p; ngx_int_t i; ngx_pid_t pid; ngx_exec_ctx_t ctx; ngx_listening_t *ls; ctx.path = argv[0]; ctx.name = "new binary process"; ctx.argv = argv; var = ngx_alloc(NGINX_VAR_LEN + cycle->listening.nelts * (NGX_INT32_LEN + 1) + 1, cycle->log); p = ngx_cpymem(var, NGINX_VAR, NGINX_VAR_LEN); ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { p += ngx_snprintf(p, NGX_INT32_LEN + 2, "%u;", ls[i].fd); } env[0] = var; env[1] = NULL; ctx.envp = (char *const *) &env; pid = ngx_exec(cycle, &ctx); ngx_free(var); return pid; } static ngx_int_t ngx_getopt(ngx_master_ctx_t *ctx, ngx_cycle_t *cycle) { ngx_int_t i; for (i = 1; i < ctx->argc; i++) { if (ctx->argv[i][0] != '-') { ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "invalid option: \"%s\"", ctx->argv[i]); return NGX_ERROR; } switch (ctx->argv[i][1]) { case 'c': cycle->conf_file.data = ctx->argv[++i]; cycle->conf_file.len = ngx_strlen(cycle->conf_file.data); break; default: ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "invalid option: \"%s\"", ctx->argv[i]); return NGX_ERROR; } } if (cycle->conf_file.data == NULL) { cycle->conf_file.len = sizeof(NGINX_CONF) - 1; cycle->conf_file.data = NGINX_CONF; } return NGX_OK; } static ngx_int_t ngx_core_module_init(ngx_cycle_t *cycle) { ngx_core_conf_t *ccf; /* * ngx_core_module has a special init procedure: it is called by * ngx_init_cycle() before the configuration file parsing to create * ngx_core_module configuration and to set its default parameters */ if (((void **)(cycle->conf_ctx))[ngx_core_module.index] != NULL) { return NGX_OK; } if (!(ccf = ngx_pcalloc(cycle->pool, sizeof(ngx_core_conf_t)))) { return NGX_ERROR; } /* set by pcalloc() * * ccf->pid = NULL; * ccf->newpid = NULL; */ ccf->daemon = NGX_CONF_UNSET; ccf->master = NGX_CONF_UNSET; ccf->worker_reopen = NGX_CONF_UNSET; ccf->user = (uid_t) NGX_CONF_UNSET; ccf->group = (gid_t) NGX_CONF_UNSET; ((void **)(cycle->conf_ctx))[ngx_core_module.index] = ccf; return NGX_OK; } static char *ngx_set_user(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { struct passwd *pwd; struct group *grp; ngx_str_t *value; ngx_core_conf_t *ccf; ccf = *(void **)conf; if (ccf->user != (uid_t) NGX_CONF_UNSET) { return "is duplicate"; } value = (ngx_str_t *) cf->args->elts; pwd = getpwnam(value[1].data); if (pwd == NULL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno, "getpwnam(%s) failed", value[1].data); return NGX_CONF_ERROR; } ccf->user = pwd->pw_uid; if (cf->args->nelts == 2) { return NGX_CONF_OK; } grp = getgrnam(value[2].data); if (grp == NULL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno, "getgrnam(%s) failed", value[1].data); return NGX_CONF_ERROR; } ccf->group = grp->gr_gid; return NGX_CONF_OK; }