nginx/src/core/nginx.c

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/*
* Copyright (C) Igor Sysoev
*/
#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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static ngx_int_t ngx_add_inherited_sockets(ngx_cycle_t *cycle);
static ngx_int_t ngx_getopt(ngx_cycle_t *cycle, int argc, char *const *argv);
static ngx_int_t ngx_save_argv(ngx_cycle_t *cycle, int argc, char *const *argv);
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static void *ngx_core_module_create_conf(ngx_cycle_t *cycle);
static char *ngx_core_module_init_conf(ngx_cycle_t *cycle, void *conf);
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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_conf_enum_t ngx_debug_points[] = {
{ ngx_string("stop"), NGX_DEBUG_POINTS_STOP },
{ ngx_string("abort"), NGX_DEBUG_POINTS_ABORT },
{ ngx_null_string, 0 }
};
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static ngx_command_t ngx_core_commands[] = {
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{ ngx_string("daemon"),
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NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
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0,
offsetof(ngx_core_conf_t, daemon),
NULL },
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{ ngx_string("master_process"),
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NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_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_string("worker_processes"),
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NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
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0,
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offsetof(ngx_core_conf_t, worker_processes),
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NULL },
{ ngx_string("debug_points"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
0,
offsetof(ngx_core_conf_t, debug_points),
&ngx_debug_points },
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#if (NGX_THREADS)
{ ngx_string("worker_threads"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
0,
offsetof(ngx_core_conf_t, worker_threads),
NULL },
{ ngx_string("thread_stack_size"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
0,
offsetof(ngx_core_conf_t, thread_stack_size),
NULL },
#endif
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{ ngx_string("user"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE12,
ngx_set_user,
0,
0,
NULL },
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{ ngx_string("pid"),
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NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
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0,
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offsetof(ngx_core_conf_t, pid),
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NULL },
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ngx_null_command
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};
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static ngx_core_module_t ngx_core_module_ctx = {
ngx_string("core"),
ngx_core_module_create_conf,
ngx_core_module_init_conf
};
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ngx_module_t ngx_core_module = {
NGX_MODULE,
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&ngx_core_module_ctx, /* module context */
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ngx_core_commands, /* module directives */
NGX_CORE_MODULE, /* module type */
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NULL, /* init module */
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NULL /* init process */
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};
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ngx_uint_t ngx_max_module;
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int 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;
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#if (NGX_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 (NGX_PCRE)
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ngx_regex_init();
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#endif
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ngx_pid = ngx_getpid();
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if (!(log = ngx_log_init())) {
return 1;
}
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#if (NGX_OPENSSL)
ngx_ssl_init(log);
#endif
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/* init_cycle->log is required for signal handlers and ngx_getopt() */
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ngx_memzero(&init_cycle, sizeof(ngx_cycle_t));
init_cycle.log = log;
ngx_cycle = &init_cycle;
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if (!(init_cycle.pool = ngx_create_pool(1024, log))) {
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return 1;
}
if (ngx_save_argv(&init_cycle, argc, argv) == NGX_ERROR) {
return 1;
}
if (ngx_getopt(&init_cycle, argc, ngx_argv) == NGX_ERROR) {
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return 1;
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}
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if (ngx_test_config) {
log->log_level = NGX_LOG_INFO;
}
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if (ngx_os_init(log) == NGX_ERROR) {
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return 1;
}
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if (ngx_add_inherited_sockets(&init_cycle) == NGX_ERROR) {
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return 1;
}
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ngx_max_module = 0;
for (i = 0; ngx_modules[i]; i++) {
ngx_modules[i]->index = ngx_max_module++;
}
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cycle = ngx_init_cycle(&init_cycle);
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if (cycle == NULL) {
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if (ngx_test_config) {
ngx_log_error(NGX_LOG_EMERG, log, 0,
"the configuration file \"%s\" test failed",
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init_cycle.conf_file.data);
}
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return 1;
}
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if (ngx_test_config) {
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ngx_log_error(NGX_LOG_INFO, log, 0,
"the configuration file \"%s\" was tested successfully",
cycle->conf_file.data);
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return 0;
}
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ngx_os_status(cycle->log);
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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 ? NGX_PROCESS_MASTER : NGX_PROCESS_SINGLE;
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#if (NGX_WIN32)
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#if 0
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TODO:
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if (ccf->run_as_service) {
if (ngx_service(cycle->log) == NGX_ERROR) {
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return 1;
}
return 0;
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}
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#endif
#else
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if (!ngx_inherited && ccf->daemon) {
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if (ngx_daemon(cycle->log) == NGX_ERROR) {
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return 1;
}
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ngx_daemonized = 1;
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}
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if (ngx_create_pidfile(cycle, NULL) == NGX_ERROR) {
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return 1;
}
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#endif
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if (ngx_process == NGX_PROCESS_MASTER) {
ngx_master_process_cycle(cycle);
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} else {
ngx_single_process_cycle(cycle);
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}
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return 0;
}
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static ngx_int_t ngx_add_inherited_sockets(ngx_cycle_t *cycle)
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{
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u_char *p, *v, *inherited;
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ngx_socket_t s;
ngx_listening_t *ls;
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inherited = (u_char *) getenv(NGINX_VAR);
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if (inherited == NULL) {
return NGX_OK;
}
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ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
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"using inherited sockets from \"%s\"", inherited);
if (ngx_array_init(&cycle->listening, cycle->pool, 10,
sizeof(ngx_listening_t)) == NGX_ERROR)
{
return NGX_ERROR;
}
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for (p = inherited, 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_VAR " enviroment variable, "
"ignoring the rest of the variable", v);
break;
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}
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v = p + 1;
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if (!(ls = ngx_array_push(&cycle->listening))) {
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return NGX_ERROR;
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}
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ls->fd = s;
}
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}
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ngx_inherited = 1;
return ngx_set_inherited_sockets(cycle);
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}
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ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv)
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{
char *env[3], *var;
u_char *p;
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ngx_uint_t i;
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ngx_pid_t pid;
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ngx_exec_ctx_t ctx;
ngx_listening_t *ls;
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ctx.path = argv[0];
ctx.name = "new binary process";
ctx.argv = argv;
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var = ngx_alloc(sizeof(NGINX_VAR)
+ cycle->listening.nelts * (NGX_INT32_LEN + 1) + 2,
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cycle->log);
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p = ngx_cpymem(var, NGINX_VAR "=", sizeof(NGINX_VAR));
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ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
p = ngx_sprintf(p, "%ud;", ls[i].fd);
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}
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*p = '\0';
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ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0, "inherited: %s", var);
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env[0] = var;
#if (NGX_SETPROCTITLE_USES_ENV)
/* allocate the spare 300 bytes for the new binary process title */
env[1] = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
env[2] = NULL;
#else
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env[1] = NULL;
#endif
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ctx.envp = (char *const *) &env;
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pid = ngx_execute(cycle, &ctx);
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ngx_free(var);
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return pid;
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}
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static ngx_int_t ngx_getopt(ngx_cycle_t *cycle, int argc, char *const *argv)
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{
ngx_int_t i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-') {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
"invalid option: \"%s\"", argv[i]);
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return NGX_ERROR;
}
switch (argv[i][1]) {
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case 't':
ngx_test_config = 1;
break;
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case 'c':
if (argv[i + 1] == NULL) {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
"the option: \"%s\" requires file name",
argv[i]);
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return NGX_ERROR;
}
cycle->conf_file.data = (u_char *) argv[++i];
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cycle->conf_file.len = ngx_strlen(cycle->conf_file.data);
break;
default:
ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
"invalid option: \"%s\"", argv[i]);
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return NGX_ERROR;
}
}
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if (cycle->conf_file.data == NULL) {
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cycle->conf_file.len = sizeof(NGX_CONF_PATH) - 1;
cycle->conf_file.data = (u_char *) NGX_CONF_PATH;
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}
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if (ngx_conf_full_name(cycle, &cycle->conf_file) == NGX_ERROR) {
return NGX_ERROR;
}
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return NGX_OK;
}
static ngx_int_t ngx_save_argv(ngx_cycle_t *cycle, int argc, char *const *argv)
{
size_t len;
ngx_int_t i;
ngx_os_argv = (char **) argv;
ngx_argc = argc;
#if (NGX_FREEBSD)
ngx_argv = (char **) argv;
#else
if (!(ngx_argv = ngx_alloc((argc + 1) * sizeof(char *), cycle->log))) {
return NGX_ERROR;
}
for (i = 0; i < argc; i++) {
len = ngx_strlen(argv[i]) + 1;
if (!(ngx_argv[i] = ngx_alloc(len, cycle->log))) {
return NGX_ERROR;
}
ngx_cpystrn((u_char *) ngx_argv[i], (u_char *) argv[i], len);
}
ngx_argv[i] = NULL;
#endif
return NGX_OK;
}
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static void *ngx_core_module_create_conf(ngx_cycle_t *cycle)
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{
ngx_core_conf_t *ccf;
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if (!(ccf = ngx_pcalloc(cycle->pool, sizeof(ngx_core_conf_t)))) {
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return NULL;
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}
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/* set by pcalloc()
*
* ccf->pid = NULL;
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* ccf->newpid = NULL;
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*/
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ccf->daemon = NGX_CONF_UNSET;
ccf->master = NGX_CONF_UNSET;
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ccf->worker_processes = NGX_CONF_UNSET;
ccf->debug_points = NGX_CONF_UNSET;
ccf->user = (ngx_uid_t) NGX_CONF_UNSET;
ccf->group = (ngx_gid_t) NGX_CONF_UNSET;
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#if (NGX_THREADS)
ccf->worker_threads = NGX_CONF_UNSET;
ccf->thread_stack_size = NGX_CONF_UNSET_SIZE;
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#endif
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return ccf;
}
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static char *ngx_core_module_init_conf(ngx_cycle_t *cycle, void *conf)
{
ngx_core_conf_t *ccf = conf;
#if !(NGX_WIN32)
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struct passwd *pwd;
struct group *grp;
#endif
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ngx_conf_init_value(ccf->daemon, 1);
ngx_conf_init_value(ccf->master, 1);
ngx_conf_init_value(ccf->worker_processes, 1);
ngx_conf_init_value(ccf->debug_points, 0);
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#if (NGX_THREADS)
ngx_conf_init_value(ccf->worker_threads, 0);
ngx_threads_n = ccf->worker_threads;
ngx_conf_init_size_value(ccf->thread_stack_size, 2 * 1024 * 1024);
#endif
#if !(NGX_WIN32)
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if (ccf->user == (uid_t) NGX_CONF_UNSET && geteuid() == 0) {
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pwd = getpwnam(NGX_USER);
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if (pwd == NULL) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"getpwnam(\"" NGX_USER "\") failed");
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return NGX_CONF_ERROR;
}
ccf->user = pwd->pw_uid;
grp = getgrnam(NGX_GROUP);
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if (grp == NULL) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"getgrnam(\"" NGX_GROUP "\") failed");
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return NGX_CONF_ERROR;
}
ccf->group = grp->gr_gid;
}
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if (ccf->pid.len == 0) {
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ccf->pid.len = sizeof(NGX_PID_PATH) - 1;
ccf->pid.data = (u_char *) NGX_PID_PATH;
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}
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if (ngx_conf_full_name(cycle, &ccf->pid) == NGX_ERROR) {
return NGX_CONF_ERROR;
}
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ccf->newpid.len = ccf->pid.len + sizeof(NGX_NEWPID_EXT);
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if (!(ccf->newpid.data = ngx_palloc(cycle->pool, ccf->newpid.len))) {
return NGX_CONF_ERROR;
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}
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ngx_memcpy(ngx_cpymem(ccf->newpid.data, ccf->pid.data, ccf->pid.len),
NGX_NEWPID_EXT, sizeof(NGX_NEWPID_EXT));
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#endif
return NGX_CONF_OK;
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}
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static char *ngx_set_user(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
#if (NGX_WIN32)
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ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"\"user\" is not supported, ignored");
return NGX_CONF_OK;
#else
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ngx_core_conf_t *ccf = conf;
char *group;
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struct passwd *pwd;
struct group *grp;
ngx_str_t *value;
if (ccf->user != (uid_t) NGX_CONF_UNSET) {
return "is duplicate";
}
if (geteuid() != 0) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"the \"user\" directive makes sense only "
"if the master process runs "
"with super-user privileges, ignored");
return NGX_CONF_OK;
}
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value = (ngx_str_t *) cf->args->elts;
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pwd = getpwnam((const char *) value[1].data);
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if (pwd == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
"getpwnam(\"%s\") failed", value[1].data);
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return NGX_CONF_ERROR;
}
ccf->user = pwd->pw_uid;
group = (char *) ((cf->args->nelts == 2) ? value[1].data : value[2].data);
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grp = getgrnam(group);
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if (grp == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
"getgrnam(\"%s\") failed", group);
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return NGX_CONF_ERROR;
}
ccf->group = grp->gr_gid;
return NGX_CONF_OK;
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#endif
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}