mirror of
https://github.com/nginx/nginx.git
synced 2024-12-16 22:47:47 +08:00
803 lines
23 KiB
C
803 lines
23 KiB
C
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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#include <nginx.h>
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typedef struct {
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int daemon;
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int master;
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uid_t user;
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gid_t group;
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ngx_str_t pid;
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ngx_str_t newpid;
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} ngx_core_conf_t;
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typedef struct {
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ngx_file_t pid;
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char *name;
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char *const *argv;
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} ngx_master_ctx_t;
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static void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx);
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static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx);
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static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
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static ngx_int_t ngx_add_inherited_sockets(ngx_cycle_t *cycle, char **envp);
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static ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv);
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static ngx_int_t ngx_core_module_init(ngx_cycle_t *cycle);
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static char *ngx_set_user(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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static ngx_str_t core_name = ngx_string("core");
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static ngx_command_t ngx_core_commands[] = {
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{ ngx_string("user"),
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NGX_MAIN_CONF|NGX_CONF_TAKE12,
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ngx_set_user,
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0,
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0,
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NULL },
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{ ngx_string("daemon"),
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NGX_MAIN_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_core_flag_slot,
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0,
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offsetof(ngx_core_conf_t, daemon),
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NULL },
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{ ngx_string("master_process"),
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NGX_MAIN_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_core_flag_slot,
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0,
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offsetof(ngx_core_conf_t, master),
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NULL },
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ngx_null_command
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};
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ngx_module_t ngx_core_module = {
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NGX_MODULE,
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&core_name, /* module context */
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ngx_core_commands, /* module directives */
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NGX_CORE_MODULE, /* module type */
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ngx_core_module_init, /* init module */
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NULL /* init child */
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};
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ngx_int_t ngx_max_module;
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ngx_uint_t ngx_connection_counter;
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ngx_int_t ngx_process;
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ngx_pid_t ngx_new_binary;
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ngx_int_t ngx_inherited;
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ngx_int_t ngx_signal;
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ngx_int_t ngx_reap;
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ngx_int_t ngx_terminate;
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ngx_int_t ngx_quit;
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ngx_int_t ngx_noaccept;
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ngx_int_t ngx_reconfigure;
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ngx_int_t ngx_reopen;
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ngx_int_t ngx_change_binary;
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int main(int argc, char *const *argv, char **envp)
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{
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ngx_fd_t fd;
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ngx_int_t i;
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ngx_log_t *log;
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ngx_cycle_t *cycle, init_cycle;
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ngx_open_file_t *file;
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ngx_core_conf_t *ccf;
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ngx_master_ctx_t ctx;
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#if !(WIN32)
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size_t len;
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char pid[/* STUB */ 10];
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#endif
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#if __FreeBSD__
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ngx_debug_init();
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#endif
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/* TODO */ ngx_max_sockets = -1;
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ngx_time_init();
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#if (HAVE_PCRE)
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ngx_regex_init();
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#endif
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log = ngx_log_init_errlog();
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/* init_cycle->log is required for signal handlers */
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ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
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init_cycle.log = log;
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ngx_cycle = &init_cycle;
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if (ngx_os_init(log) == NGX_ERROR) {
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return 1;
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}
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ngx_max_module = 0;
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for (i = 0; ngx_modules[i]; i++) {
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ngx_modules[i]->index = ngx_max_module++;
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}
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if (!(init_cycle.pool = ngx_create_pool(1024, log))) {
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return 1;
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}
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if (ngx_add_inherited_sockets(&init_cycle, envp) == NGX_ERROR) {
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return 1;
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}
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cycle = ngx_init_cycle(&init_cycle);
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if (cycle == NULL) {
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return 1;
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}
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ngx_cycle = cycle;
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ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
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ngx_process = (ccf->master != 0) ? NGX_PROCESS_MASTER : NGX_PROCESS_SINGLE;
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#if (WIN32)
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#if 0
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if (run_as_service) {
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if (ngx_servie(cycle->log) == NGX_ERROR) {
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return 1;
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}
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return 0;
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}
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#endif
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#else
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if (ccf->daemon != 0) {
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if (ngx_daemon(cycle->log) == NGX_ERROR) {
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return 1;
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}
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}
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if (dup2(cycle->log->file->fd, STDERR_FILENO) == -1) {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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"dup2(STDERR) failed");
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return 1;
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}
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if (ccf->pid.len == 0) {
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ccf->pid.len = sizeof(NGINX_PID) - 1;
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ccf->pid.data = NGINX_PID;
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ccf->newpid.len = sizeof(NGINX_NEW_PID) - 1;
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ccf->newpid.data = NGINX_NEW_PID;
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}
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len = ngx_snprintf(pid, /* STUB */ 10, PID_T_FMT, ngx_getpid());
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ngx_memzero(&ctx.pid, sizeof(ngx_file_t));
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ctx.pid.name = ngx_inherited ? ccf->newpid : ccf->pid;
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ctx.name = ccf->pid.data;
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ctx.pid.fd = ngx_open_file(ctx.pid.name.data, NGX_FILE_RDWR,
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NGX_FILE_CREATE_OR_OPEN);
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if (ctx.pid.fd == NGX_INVALID_FILE) {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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ngx_open_file_n " \"%s\" failed", ctx.pid.name.data);
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return 1;
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}
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if (ngx_write_file(&ctx.pid, pid, len, 0) == NGX_ERROR) {
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return 1;
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}
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if (ngx_close_file(ctx.pid.fd) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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ngx_close_file_n " \"%s\" failed", ctx.pid.name.data);
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}
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#endif
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ctx.argv = argv;
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ngx_master_process_cycle(cycle, &ctx);
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return 0;
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}
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/* TODO: broken single process */
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static void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx)
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{
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int signo;
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char *name;
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sigset_t set, wset;
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struct timeval tv;
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ngx_uint_t i, live, sent;
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ngx_msec_t delay;
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delay = 125;
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sigemptyset(&set);
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sigaddset(&set, SIGCHLD);
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sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
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sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
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sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
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sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
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sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
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sigemptyset(&wset);
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if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"sigprocmask() failed");
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}
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ngx_signal = 0;
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ngx_new_binary = 0;
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signo = 0;
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sent = 0;
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live = 0;
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for ( ;; ) {
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "new cycle");
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if (ngx_process == NGX_PROCESS_MASTER) {
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ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
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"worker process", NGX_PROCESS_RESPAWN);
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live = 1;
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} else {
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ngx_init_temp_number();
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for (i = 0; ngx_modules[i]; i++) {
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if (ngx_modules[i]->init_process) {
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if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
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/* fatal */
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exit(1);
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}
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}
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}
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}
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/* a cycle with the same configuration because a new one is invalid */
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for ( ;; ) {
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/* an event loop */
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for ( ;; ) {
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if (ngx_process == NGX_PROCESS_MASTER) {
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if (sent) {
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"sent signal cycle");
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if (sigprocmask(SIG_UNBLOCK, &set, NULL) == -1) {
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"sigprocmask() failed");
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continue;
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}
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/*
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* there is very big chance that the pending signals
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* would be delivered right on the sigprocmask() return
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*/
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if (!ngx_signal) {
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if (delay < 15000) {
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delay *= 2;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"msleep %d", delay);
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ngx_msleep(delay);
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ngx_gettimeofday(&tv);
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ngx_time_update(tv.tv_sec);
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"wake up");
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}
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if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"sigprocmask() failed");
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}
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ngx_signal = 0;
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} else {
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"sigsuspend");
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sigsuspend(&wset);
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ngx_gettimeofday(&tv);
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ngx_time_update(tv.tv_sec);
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"wake up");
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}
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} else { /* NGX_PROCESS_SINGLE */
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"worker cycle");
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ngx_process_events(cycle->log);
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}
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if (ngx_reap) {
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"reap childs");
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live = 0;
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for (i = 0; i < ngx_last_process; i++) {
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ngx_log_debug6(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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"child: " PID_T_FMT
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" s:%d e:%d t:%d d:%d r:%d",
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ngx_processes[i].pid,
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ngx_processes[i].signal,
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ngx_processes[i].exiting,
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ngx_processes[i].exited,
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ngx_processes[i].detached,
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ngx_processes[i].respawn);
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if (ngx_processes[i].exited) {
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if (ngx_processes[i].respawn
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&& !ngx_processes[i].exiting
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&& !ngx_terminate
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&& !ngx_quit)
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{
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if (ngx_spawn_process(cycle,
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ngx_processes[i].proc,
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ngx_processes[i].data,
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ngx_processes[i].name, i)
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== NGX_ERROR)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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"can not respawn %s",
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ngx_processes[i].name);
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}
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continue;
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}
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if (ngx_processes[i].pid == ngx_new_binary) {
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ngx_new_binary = 0;
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}
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if (i != --ngx_last_process) {
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ngx_processes[i--] =
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ngx_processes[ngx_last_process];
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}
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} else if (!ngx_processes[i].detached
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&& (ngx_terminate || ngx_quit))
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{
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live = 1;
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} else if (ngx_processes[i].exiting) {
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live = 1;
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}
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}
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if (!live) {
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sent = 0;
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}
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}
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if (!live && (ngx_terminate || ngx_quit)) {
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ngx_master_exit(cycle, ctx);
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}
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if (ngx_terminate) {
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if (delay > 10000) {
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signo = SIGKILL;
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} else {
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signo = ngx_signal_value(NGX_TERMINATE_SIGNAL);
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}
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} else if (ngx_quit) {
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signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
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} else {
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if (ngx_noaccept) {
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signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
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}
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if (ngx_change_binary) {
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ngx_change_binary = 0;
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ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
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"changing binary");
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ngx_new_binary = ngx_exec_new_binary(cycle, ctx->argv);
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}
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if (ngx_reconfigure) {
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signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
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ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
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"reconfiguring");
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}
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if (ngx_reopen) {
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/* STUB */
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signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
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ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
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"reopening logs");
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ngx_reopen_files(cycle);
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}
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}
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if (signo) {
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for (i = 0; i < ngx_last_process; i++) {
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if (!ngx_processes[i].detached) {
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ngx_processes[i].signal = signo;
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ngx_log_debug2(NGX_LOG_DEBUG_EVENT,
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cycle->log, 0,
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"signal " PID_T_FMT " %d",
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ngx_processes[i].pid, signo);
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}
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}
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delay = 125;
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signo = 0;
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}
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for (i = 0; i < ngx_last_process; i++) {
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if (ngx_processes[i].signal == 0) {
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continue;
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}
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sent = 1;
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ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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"kill (" PID_T_FMT ", %d)" ,
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ngx_processes[i].pid,
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ngx_processes[i].signal);
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if (kill(ngx_processes[i].pid, ngx_processes[i].signal)
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== -1)
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{
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ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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"kill(%d, %d) failed",
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ngx_processes[i].pid,
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ngx_processes[i].signal);
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continue;
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}
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if (ngx_processes[i].signal
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!= ngx_signal_value(NGX_REOPEN_SIGNAL))
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{
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ngx_processes[i].exiting = 1;
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}
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}
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if (ngx_reap) {
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ngx_reap = 0;
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}
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/* STUB */
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if (ngx_reopen) {
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break;
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}
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if (ngx_reconfigure) {
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break;
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}
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}
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if (ngx_reopen) {
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ngx_reopen = 0;
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} else if (ngx_noaccept) {
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ngx_noaccept = 0;
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} else {
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cycle = ngx_init_cycle(cycle);
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if (cycle == NULL) {
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cycle = (ngx_cycle_t *) ngx_cycle;
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continue;
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}
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ngx_cycle = cycle;
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}
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ngx_reconfigure = 0;
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break;
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}
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}
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}
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static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx)
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{
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char *name;
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if (ngx_inherited && getppid() > 1) {
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name = ctx->pid.name.data;
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} else {
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name = ctx->name;
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}
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|
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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;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* TODO: threads: start ngx_worker_thread_cycle() */
|
|
|
|
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 shutdowning");
|
|
break;
|
|
}
|
|
|
|
if (ngx_reopen) {
|
|
ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs");
|
|
ngx_reopen_files(cycle);
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
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_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->daemon = NGX_CONF_UNSET;
|
|
ccf->master = 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;
|
|
}
|