Redis安排
nosql数据模型
Nosql四大分类
CAP
BASE
Redis五大基本类型
String
List
Set
Hash
Zset
三种特殊数据类型
geO
hyperloglog
bitmap
Redis配置详解
Redis持久化
RDB
AOF
Redis事物操作
Redis实现订阅发布
Redis主从复制
Redis哨兵复制
缓存穿透及方案
安装
https://github.com/dmajkic/redis/releases
Nignx
Nignx是一个高性能的HTTP和反向代理web服务器
其特点是占有内存少，并发能力强，事实上nginx的并发能力在同类型的网页服务器中表现较好
Nignx是一个安装非常简单，配置非常简洁，Nginx代码完全用C语言从头写成
Nignx Http代理，反向代理 ，正想代理
动静分离，有些请求需要后台处理的，这些不需要经过后台处理的文件成为静态文件。让动态网站里的动态网页根据一定的规则把不变的资源和经常变得资源分开来开，动静资源做好拆分以后，根据静态资源的特点将其做缓存操作，提高资源响应的速度。
来看下nginx.c吧
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include
#include
#include
static void ngx_show_version_info(void);
static ngx_int_t ngx_add_inherited_sockets(ngx_cycle_t *cycle);
static void ngx_cleanup_environment(void *data);
static ngx_int_t ngx_get_options(int argc, char *const *argv);
static ngx_int_t ngx_process_options(ngx_cycle_t *cycle);
static ngx_int_t ngx_save_argv(ngx_cycle_t *cycle, int argc, char *const *argv);
static void *ngx_core_module_create_conf(ngx_cycle_t *cycle);
static char *ngx_core_module_init_conf(ngx_cycle_t *cycle, void *conf);
static char *ngx_set_user(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_set_env(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_set_priority(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_set_cpu_affinity(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_set_worker_processes(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_load_module(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
#if (NGX_HAVE_DLOPEN)
static void ngx_unload_module(void *data);
#endif
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 }
};
static ngx_command_t ngx_core_commands[] = {
{ ngx_string("daemon"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
0,
offsetof(ngx_core_conf_t, daemon),
NULL },
{ ngx_string("master_process"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
0,
offsetof(ngx_core_conf_t, master),
NULL },
{ ngx_string("timer_resolution"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
0,
offsetof(ngx_core_conf_t, timer_resolution),
NULL },
{ ngx_string("pid"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
0,
offsetof(ngx_core_conf_t, pid),
NULL },
{ ngx_string("lock_file"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
0,
offsetof(ngx_core_conf_t, lock_file),
NULL },
{ ngx_string("worker_processes"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_set_worker_processes,
0,
0,
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 },
{ ngx_string("user"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE12,
ngx_set_user,
0,
0,
NULL },
{ ngx_string("worker_priority"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_set_priority,
0,
0,
NULL },
{ ngx_string("worker_cpu_affinity"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_1MORE,
ngx_set_cpu_affinity,
0,
0,
NULL },
{ ngx_string("worker_rlimit_nofile"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
0,
offsetof(ngx_core_conf_t, rlimit_nofile),
NULL },
{ ngx_string("worker_rlimit_core"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_off_slot,
0,
offsetof(ngx_core_conf_t, rlimit_core),
NULL },
{ ngx_string("worker_shutdown_timeout"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
0,
offsetof(ngx_core_conf_t, shutdown_timeout),
NULL },
{ ngx_string("working_directory"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
0,
offsetof(ngx_core_conf_t, working_directory),
NULL },
{ ngx_string("env"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_set_env,
0,
0,
NULL },
{ ngx_string("load_module"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_load_module,
0,
0,
NULL },
ngx_null_command
};
static ngx_core_module_t ngx_core_module_ctx = {
ngx_string("core"),
ngx_core_module_create_conf,
ngx_core_module_init_conf
};
ngx_module_t ngx_core_module = {
NGX_MODULE_V1,
&ngx_core_module_ctx, /* module context */
ngx_core_commands, /* module directives */
NGX_CORE_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_uint_t ngx_show_help;
static ngx_uint_t ngx_show_version;
static ngx_uint_t ngx_show_configure;
static u_char *ngx_prefix;
static u_char *ngx_error_log;
static u_char *ngx_conf_file;
static u_char *ngx_conf_params;
static char *ngx_signal;
static char **ngx_os_environ;
int ngx_cdecl
main(int argc, char *const *argv)
{
ngx_buf_t *b;
ngx_log_t *log;
ngx_uint_t i;
ngx_cycle_t *cycle, init_cycle;
ngx_conf_dump_t *cd;
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_show_version_info();
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();
ngx_parent = ngx_getppid();
log = ngx_log_init(ngx_prefix, ngx_error_log);
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;
}
/*
* ngx_slab_sizes_init() requires ngx_pagesize set in ngx_os_init()
*/
ngx_slab_sizes_init();
if (ngx_add_inherited_sockets(&init_cycle) != NGX_OK) {
return 1;
}
if (ngx_preinit_modules() != NGX_OK) {
return 1;
}
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);
}
if (ngx_dump_config) {
cd = cycle->config_dump.elts;
for (i = 0; i < cycle->config_dump.nelts; i++) {
ngx_write_stdout("# configuration file ");
(void) ngx_write_fd(ngx_stdout, cd[i].name.data,
cd[i].name.len);
ngx_write_stdout(":" NGX_LINEFEED);
b = cd[i].buffer;
(void) ngx_write_fd(ngx_stdout, b->pos, b->last - b->pos);
ngx_write_stdout(NGX_LINEFEED);
}
}
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 (ngx_log_redirect_stderr(cycle) != NGX_OK) {
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;
}
static void
ngx_show_version_info(void)
{
ngx_write_stderr("nginx version: " NGINX_VER_BUILD NGX_LINEFEED);
if (ngx_show_help) {
ngx_write_stderr(
"Usage: nginx [-?hvVtTq] [-s signal] [-p prefix]" NGX_LINEFEED
" [-e filename] [-c filename] [-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
" -T : test configuration, dump it 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
" -e filename : set error log file (default: "
#ifdef NGX_ERROR_LOG_STDERR
"stderr)" NGX_LINEFEED
#else
NGX_ERROR_LOG_PATH ")" 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) {
#ifdef NGX_COMPILER
ngx_write_stderr("built by " NGX_COMPILER NGX_LINEFEED);
#endif
#if (NGX_SSL)
if (ngx_strcmp(ngx_ssl_version(), OPENSSL_VERSION_TEXT) == 0) {
ngx_write_stderr("built with " OPENSSL_VERSION_TEXT NGX_LINEFEED);
} else {
ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
" (running with ");
ngx_write_stderr((char *) (uintptr_t) ngx_ssl_version());
ngx_write_stderr(")" NGX_LINEFEED);
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
ngx_write_stderr("TLS SNI support enabled" NGX_LINEFEED);
#else
ngx_write_stderr("TLS SNI support disabled" NGX_LINEFEED);
#endif
#endif
ngx_write_stderr("configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
}
}
static ngx_int_t
ngx_add_inherited_sockets(ngx_cycle_t *cycle)
{
u_char *p, *v, *inherited;
ngx_int_t s;
ngx_listening_t *ls;
inherited = (u_char *) getenv(NGINX_VAR);
if (inherited == NULL) {
return NGX_OK;
}
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
"using inherited sockets from \"%s\"", inherited);
if (ngx_array_init(&cycle->listening, cycle->pool, 10,
sizeof(ngx_listening_t))
!= NGX_OK)
{
return NGX_ERROR;
}
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
" environment variable, ignoring the rest"
" of the variable", v);
break;
}
v = p + 1;
ls = ngx_array_push(&cycle->listening);
if (ls == NULL) {
return NGX_ERROR;
}
ngx_memzero(ls, sizeof(ngx_listening_t));
ls->fd = (ngx_socket_t) s;
ls->inherited = 1;
}
}
if (v != p) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
"invalid socket number \"%s\" in " NGINX_VAR
" environment variable, ignoring", v);
}
ngx_inherited = 1;
return ngx_set_inherited_sockets(cycle);
}
char **
ngx_set_environment(ngx_cycle_t *cycle, ngx_uint_t *last)
{
char **p, **env;
ngx_str_t *var;
ngx_uint_t i, n;
ngx_core_conf_t *ccf;
ngx_pool_cleanup_t *cln;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (last == NULL && ccf->environment) {
return ccf->environment;
}
var = ccf->env.elts;
for (i = 0; i < ccf->env.nelts; i++) {
if (ngx_strcmp(var[i].data, "TZ") == 0
|| ngx_strncmp(var[i].data, "TZ=", 3) == 0)
{
goto tz_found;
}
}
var = ngx_array_push(&ccf->env);
if (var == NULL) {
return NULL;
}
var->len = 2;
var->data = (u_char *) "TZ";
var = ccf->env.elts;
tz_found:
n = 0;
for (i = 0; i < ccf->env.nelts; i++) {
if (var[i].data[var[i].len] == '=') {
n++;
continue;
}
for (p = ngx_os_environ; *p; p++) {
if (ngx_strncmp(*p, var[i].data, var[i].len) == 0
&& (*p)[var[i].len] == '=')
{
n++;
break;
}
}
}
if (last) {
env = ngx_alloc((*last + n + 1) * sizeof(char *), cycle->log);
if (env == NULL) {
return NULL;
}
*last = n;
} else {
cln = ngx_pool_cleanup_add(cycle->pool, 0);
if (cln == NULL) {
return NULL;
}
env = ngx_alloc((n + 1) * sizeof(char *), cycle->log);
if (env == NULL) {
return NULL;
}
cln->handler = ngx_cleanup_environment;
cln->data = env;
}
n = 0;
for (i = 0; i < ccf->env.nelts; i++) {
if (var[i].data[var[i].len] == '=') {
env[n++] = (char *) var[i].data;
continue;
}
for (p = ngx_os_environ; *p; p++) {
if (ngx_strncmp(*p, var[i].data, var[i].len) == 0
&& (*p)[var[i].len] == '=')
{
env[n++] = *p;
break;
}
}
}
env[n] = NULL;
if (last == NULL) {
ccf->environment = env;
environ = env;
}
return env;
}
static void
ngx_cleanup_environment(void *data)
{
char **env = data;
if (environ == env) {
/*
* if the environment is still used, as it happens on exit,
* the only option is to leak it
*/
return;
}
ngx_free(env);
}
ngx_pid_t
ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv)
{
char **env, *var;
u_char *p;
ngx_uint_t i, n;
ngx_pid_t pid;
ngx_exec_ctx_t ctx;
ngx_core_conf_t *ccf;
ngx_listening_t *ls;
ngx_memzero(&ctx, sizeof(ngx_exec_ctx_t));
ctx.path = argv[0];
ctx.name = "new binary process";
ctx.argv = argv;
n = 2;
env = ngx_set_environment(cycle, &n);
if (env == NULL) {
return NGX_INVALID_PID;
}
var = ngx_alloc(sizeof(NGINX_VAR)
+ cycle->listening.nelts * (NGX_INT32_LEN + 1) + 2,
cycle->log);
if (var == NULL) {
ngx_free(env);
return NGX_INVALID_PID;
}
p = ngx_cpymem(var, NGINX_VAR "=", sizeof(NGINX_VAR));
ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
p = ngx_sprintf(p, "%ud;", ls[i].fd);
}
*p = '\0';
env[n++] = var;
#if (NGX_SETPROCTITLE_USES_ENV)
/* allocate the spare 300 bytes for the new binary process title */
env[n++] = "SPARE=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
#endif
env[n] = NULL;
#if (NGX_DEBUG)
{
char **e;
for (e = env; *e; e++) {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0, "env: %s", *e);
}
}
#endif
ctx.envp = (char *const *) env;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
if (ngx_rename_file(ccf->pid.data, ccf->oldpid.data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_rename_file_n " %s to %s failed "
"before executing new binary process \"%s\"",
ccf->pid.data, ccf->oldpid.data, argv[0]);
ngx_free(env);
ngx_free(var);
return NGX_INVALID_PID;
}
pid = ngx_execute(cycle, &ctx);
if (pid == NGX_INVALID_PID) {
if (ngx_rename_file(ccf->oldpid.data, ccf->pid.data)
== NGX_FILE_ERROR)
{
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
ngx_rename_file_n " %s back to %s failed after "
"an attempt to execute new binary process \"%s\"",
ccf->oldpid.data, ccf->pid.data, argv[0]);
}
}
ngx_free(env);
ngx_free(var);
return pid;
}
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 'T':
ngx_test_config = 1;
ngx_dump_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 'e':
if (*p) {
ngx_error_log = p;
} else if (argv[++i]) {
ngx_error_log = (u_char *) argv[i];
} else {
ngx_log_stderr(0, "option \"-e\" requires file name");
return NGX_ERROR;
}
if (ngx_strcmp(ngx_error_log, "stderr") == 0) {
ngx_error_log = (u_char *) "";
}
goto next;
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) {
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;
}
static ngx_int_t
ngx_save_argv(ngx_cycle_t *cycle, int argc, char *const *argv)
{
#if (NGX_FREEBSD)
ngx_os_argv = (char **) argv;
ngx_argc = argc;
ngx_argv = (char **) argv;
#else
size_t len;
ngx_int_t i;
ngx_os_argv = (char **) argv;
ngx_argc = argc;
ngx_argv = ngx_alloc((argc + 1) * sizeof(char *), cycle->log);
if (ngx_argv == NULL) {
return NGX_ERROR;
}
for (i = 0; i < argc; i++) {
len = ngx_strlen(argv[i]) + 1;
ngx_argv[i] = ngx_alloc(len, cycle->log);
if (ngx_argv[i] == NULL) {
return NGX_ERROR;
}
(void) ngx_cpystrn((u_char *) ngx_argv[i], (u_char *) argv[i], len);
}
ngx_argv[i] = NULL;
#endif
ngx_os_environ = environ;
return NGX_OK;
}
static ngx_int_t
ngx_process_options(ngx_cycle_t *cycle)
{
u_char *p;
size_t len;
if (ngx_prefix) {
len = ngx_strlen(ngx_prefix);
p = ngx_prefix;
if (len && !ngx_path_separator(p[len - 1])) {
p = ngx_pnalloc(cycle->pool, len + 1);
if (p == NULL) {
return NGX_ERROR;
}
ngx_memcpy(p, ngx_prefix, len);
p[len++] = '/';
}
cycle->conf_prefix.len = len;
cycle->conf_prefix.data = p;
cycle->prefix.len = len;
cycle->prefix.data = p;
} else {
#ifndef NGX_PREFIX
p = ngx_pnalloc(cycle->pool, NGX_MAX_PATH);
if (p == NULL) {
return NGX_ERROR;
}
if (ngx_getcwd(p, NGX_MAX_PATH) == 0) {
ngx_log_stderr(ngx_errno, "[emerg]: " ngx_getcwd_n " failed");
return NGX_ERROR;
}
len = ngx_strlen(p);
p[len++] = '/';
cycle->conf_prefix.len = len;
cycle->conf_prefix.data = p;
cycle->prefix.len = len;
cycle->prefix.data = p;
#else
#ifdef NGX_CONF_PREFIX
ngx_str_set(&cycle->conf_prefix, NGX_CONF_PREFIX);
#else
ngx_str_set(&cycle->conf_prefix, NGX_PREFIX);
#endif
ngx_str_set(&cycle->prefix, NGX_PREFIX);
#endif
}
if (ngx_conf_file) {
cycle->conf_file.len = ngx_strlen(ngx_conf_file);
cycle->conf_file.data = ngx_conf_file;
} else {
ngx_str_set(&cycle->conf_file, NGX_CONF_PATH);
}
if (ngx_conf_full_name(cycle, &cycle->conf_file, 0) != NGX_OK) {
return NGX_ERROR;
}
for (p = cycle->conf_file.data + cycle->conf_file.len - 1;
p > cycle->conf_file.data;
p--)
{
if (ngx_path_separator(*p)) {
cycle->conf_prefix.len = p - cycle->conf_file.data + 1;
cycle->conf_prefix.data = cycle->conf_file.data;
break;
}
}
if (ngx_error_log) {
cycle->error_log.len = ngx_strlen(ngx_error_log);
cycle->error_log.data = ngx_error_log;
} else {
ngx_str_set(&cycle->error_log, NGX_ERROR_LOG_PATH);
}
if (ngx_conf_params) {
cycle->conf_param.len = ngx_strlen(ngx_conf_params);
cycle->conf_param.data = ngx_conf_params;
}
if (ngx_test_config) {
cycle->log->log_level = NGX_LOG_INFO;
}
return NGX_OK;
}
static void *
ngx_core_module_create_conf(ngx_cycle_t *cycle)
{
ngx_core_conf_t *ccf;
ccf = ngx_pcalloc(cycle->pool, sizeof(ngx_core_conf_t));
if (ccf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc()
*
* ccf->pid = NULL;
* ccf->oldpid = NULL;
* ccf->priority = 0;
* ccf->cpu_affinity_auto = 0;
* ccf->cpu_affinity_n = 0;
* ccf->cpu_affinity = NULL;
*/
ccf->daemon = NGX_CONF_UNSET;
ccf->master = NGX_CONF_UNSET;
ccf->timer_resolution = NGX_CONF_UNSET_MSEC;
ccf->shutdown_timeout = NGX_CONF_UNSET_MSEC;
ccf->worker_processes = NGX_CONF_UNSET;
ccf->debug_points = NGX_CONF_UNSET;
ccf->rlimit_nofile = NGX_CONF_UNSET;
ccf->rlimit_core = NGX_CONF_UNSET;
ccf->user = (ngx_uid_t) NGX_CONF_UNSET_UINT;
ccf->group = (ngx_gid_t) NGX_CONF_UNSET_UINT;
if (ngx_array_init(&ccf->env, cycle->pool, 1, sizeof(ngx_str_t))
!= NGX_OK)
{
return NULL;
}
return ccf;
}
static char *
ngx_core_module_init_conf(ngx_cycle_t *cycle, void *conf)
{
ngx_core_conf_t *ccf = conf;
ngx_conf_init_value(ccf->daemon, 1);
ngx_conf_init_value(ccf->master, 1);
ngx_conf_init_msec_value(ccf->timer_resolution, 0);
ngx_conf_init_msec_value(ccf->shutdown_timeout, 0);
ngx_conf_init_value(ccf->worker_processes, 1);
ngx_conf_init_value(ccf->debug_points, 0);
#if (NGX_HAVE_CPU_AFFINITY)
if (!ccf->cpu_affinity_auto
&& ccf->cpu_affinity_n
&& ccf->cpu_affinity_n != 1
&& ccf->cpu_affinity_n != (ngx_uint_t) ccf->worker_processes)
{
ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
"the number of \"worker_processes\" is not equal to "
"the number of \"worker_cpu_affinity\" masks, "
"using last mask for remaining worker processes");
}
#endif
if (ccf->pid.len == 0) {
ngx_str_set(&ccf->pid, NGX_PID_PATH);
}
if (ngx_conf_full_name(cycle, &ccf->pid, 0) != NGX_OK) {
return NGX_CONF_ERROR;
}
ccf->oldpid.len = ccf->pid.len + sizeof(NGX_OLDPID_EXT);
ccf->oldpid.data = ngx_pnalloc(cycle->pool, ccf->oldpid.len);
if (ccf->oldpid.data == NULL) {
return NGX_CONF_ERROR;
}
ngx_memcpy(ngx_cpymem(ccf->oldpid.data, ccf->pid.data, ccf->pid.len),
NGX_OLDPID_EXT, sizeof(NGX_OLDPID_EXT));
#if !(NGX_WIN32)
if (ccf->user == (uid_t) NGX_CONF_UNSET_UINT && geteuid() == 0) {
struct group *grp;
struct passwd *pwd;
ngx_set_errno(0);
pwd = getpwnam(NGX_USER);
if (pwd == NULL) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"getpwnam(\"" NGX_USER "\") failed");
return NGX_CONF_ERROR;
}
ccf->username = NGX_USER;
ccf->user = pwd->pw_uid;
ngx_set_errno(0);
grp = getgrnam(NGX_GROUP);
if (grp == NULL) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"getgrnam(\"" NGX_GROUP "\") failed");
return NGX_CONF_ERROR;
}
ccf->group = grp->gr_gid;
}
if (ccf->lock_file.len == 0) {
ngx_str_set(&ccf->lock_file, NGX_LOCK_PATH);
}
if (ngx_conf_full_name(cycle, &ccf->lock_file, 0) != NGX_OK) {
return NGX_CONF_ERROR;
}
{
ngx_str_t lock_file;
lock_file = cycle->old_cycle->lock_file;
if (lock_file.len) {
lock_file.len--;
if (ccf->lock_file.len != lock_file.len
|| ngx_strncmp(ccf->lock_file.data, lock_file.data, lock_file.len)
!= 0)
{
ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
"\"lock_file\" could not be changed, ignored");
}
cycle->lock_file.len = lock_file.len + 1;
lock_file.len += sizeof(".accept");
cycle->lock_file.data = ngx_pstrdup(cycle->pool, &lock_file);
if (cycle->lock_file.data == NULL) {
return NGX_CONF_ERROR;
}
} else {
cycle->lock_file.len = ccf->lock_file.len + 1;
cycle->lock_file.data = ngx_pnalloc(cycle->pool,
ccf->lock_file.len + sizeof(".accept"));
if (cycle->lock_file.data == NULL) {
return NGX_CONF_ERROR;
}
ngx_memcpy(ngx_cpymem(cycle->lock_file.data, ccf->lock_file.data,
ccf->lock_file.len),
".accept", sizeof(".accept"));
}
}
#endif
return NGX_CONF_OK;
}
static char *
ngx_set_user(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
#if (NGX_WIN32)
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"\"user\" is not supported, ignored");
return NGX_CONF_OK;
#else
ngx_core_conf_t *ccf = conf;
char *group;
struct passwd *pwd;
struct group *grp;
ngx_str_t *value;
if (ccf->user != (uid_t) NGX_CONF_UNSET_UINT) {
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;
}
value = cf->args->elts;
ccf->username = (char *) value[1].data;
ngx_set_errno(0);
pwd = getpwnam((const char *) 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;
group = (char *) ((cf->args->nelts == 2) ? value[1].data : value[2].data);
ngx_set_errno(0);
grp = getgrnam(group);
if (grp == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
"getgrnam(\"%s\") failed", group);
return NGX_CONF_ERROR;
}
ccf->group = grp->gr_gid;
return NGX_CONF_OK;
#endif
}
static char *
ngx_set_env(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_core_conf_t *ccf = conf;
ngx_str_t *value, *var;
ngx_uint_t i;
var = ngx_array_push(&ccf->env);
if (var == NULL) {
return NGX_CONF_ERROR;
}
value = cf->args->elts;
*var = value[1];
for (i = 0; i < value[1].len; i++) {
if (value[1].data[i] == '=') {
var->len = i;
return NGX_CONF_OK;
}
}
return NGX_CONF_OK;
}
static char *
ngx_set_priority(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_core_conf_t *ccf = conf;
ngx_str_t *value;
ngx_uint_t n, minus;
if (ccf->priority != 0) {
return "is duplicate";
}
value = cf->args->elts;
if (value[1].data[0] == '-') {
n = 1;
minus = 1;
} else if (value[1].data[0] == '+') {
n = 1;
minus = 0;
} else {
n = 0;
minus = 0;
}
ccf->priority = ngx_atoi(&value[1].data[n], value[1].len - n);
if (ccf->priority == NGX_ERROR) {
return "invalid number";
}
if (minus) {
ccf->priority = -ccf->priority;
}
return NGX_CONF_OK;
}
static char *
ngx_set_cpu_affinity(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
#if (NGX_HAVE_CPU_AFFINITY)
ngx_core_conf_t *ccf = conf;
u_char ch, *p;
ngx_str_t *value;
ngx_uint_t i, n;
ngx_cpuset_t *mask;
if (ccf->cpu_affinity) {
return "is duplicate";
}
mask = ngx_palloc(cf->pool, (cf->args->nelts - 1) * sizeof(ngx_cpuset_t));
if (mask == NULL) {
return NGX_CONF_ERROR;
}
ccf->cpu_affinity_n = cf->args->nelts - 1;
ccf->cpu_affinity = mask;
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "auto") == 0) {
if (cf->args->nelts > 3) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid number of arguments in "
"\"worker_cpu_affinity\" directive");
return NGX_CONF_ERROR;
}
ccf->cpu_affinity_auto = 1;
CPU_ZERO(&mask[0]);
for (i = 0; i < (ngx_uint_t) ngx_min(ngx_ncpu, CPU_SETSIZE); i++) {
CPU_SET(i, &mask[0]);
}
n = 2;
} else {
n = 1;
}
for ( /* void */ ; n < cf->args->nelts; n++) {
if (value[n].len > CPU_SETSIZE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"worker_cpu_affinity\" supports up to %d CPUs only",
CPU_SETSIZE);
return NGX_CONF_ERROR;
}
i = 0;
CPU_ZERO(&mask[n - 1]);
for (p = value[n].data + value[n].len - 1;
p >= value[n].data;
p--)
{
ch = *p;
if (ch == ' ') {
continue;
}
i++;
if (ch == '0') {
continue;
}
if (ch == '1') {
CPU_SET(i - 1, &mask[n - 1]);
continue;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid character \"%c\" in \"worker_cpu_affinity\"",
ch);
return NGX_CONF_ERROR;
}
}
#else
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"\"worker_cpu_affinity\" is not supported "
"on this platform, ignored");
#endif
return NGX_CONF_OK;
}
ngx_cpuset_t *
ngx_get_cpu_affinity(ngx_uint_t n)
{
#if (NGX_HAVE_CPU_AFFINITY)
ngx_uint_t i, j;
ngx_cpuset_t *mask;
ngx_core_conf_t *ccf;
static ngx_cpuset_t result;
ccf = (ngx_core_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx,
ngx_core_module);
if (ccf->cpu_affinity == NULL) {
return NULL;
}
if (ccf->cpu_affinity_auto) {
mask = &ccf->cpu_affinity[ccf->cpu_affinity_n - 1];
for (i = 0, j = n; /* void */ ; i++) {
if (CPU_ISSET(i % CPU_SETSIZE, mask) && j-- == 0) {
break;
}
if (i == CPU_SETSIZE && j == n) {
/* empty mask */
return NULL;
}
/* void */
}
CPU_ZERO(&result);
CPU_SET(i % CPU_SETSIZE, &result);
return &result;
}
if (ccf->cpu_affinity_n > n) {
return &ccf->cpu_affinity[n];
}
return &ccf->cpu_affinity[ccf->cpu_affinity_n - 1];
#else
return NULL;
#endif
}
static char *
ngx_set_worker_processes(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_str_t *value;
ngx_core_conf_t *ccf;
ccf = (ngx_core_conf_t *) conf;
if (ccf->worker_processes != NGX_CONF_UNSET) {
return "is duplicate";
}
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "auto") == 0) {
ccf->worker_processes = ngx_ncpu;
return NGX_CONF_OK;
}
ccf->worker_processes = ngx_atoi(value[1].data, value[1].len);
if (ccf->worker_processes == NGX_ERROR) {
return "invalid value";
}
return NGX_CONF_OK;
}
static char *
ngx_load_module(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
#if (NGX_HAVE_DLOPEN)
void *handle;
char **names, **order;
ngx_str_t *value, file;
ngx_uint_t i;
ngx_module_t *module, **modules;
ngx_pool_cleanup_t *cln;
if (cf->cycle->modules_used) {
return "is specified too late";
}
value = cf->args->elts;
file = value[1];
if (ngx_conf_full_name(cf->cycle, &file, 0) != NGX_OK) {
return NGX_CONF_ERROR;
}
cln = ngx_pool_cleanup_add(cf->cycle->pool, 0);
if (cln == NULL) {
return NGX_CONF_ERROR;
}
handle = ngx_dlopen(file.data);
if (handle == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
ngx_dlopen_n " \"%s\" failed (%s)",
file.data, ngx_dlerror());
return NGX_CONF_ERROR;
}
cln->handler = ngx_unload_module;
cln->data = handle;
modules = ngx_dlsym(handle, "ngx_modules");
if (modules == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
ngx_dlsym_n " \"%V\", \"%s\" failed (%s)",
&value[1], "ngx_modules", ngx_dlerror());
return NGX_CONF_ERROR;
}
names = ngx_dlsym(handle, "ngx_module_names");
if (names == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
ngx_dlsym_n " \"%V\", \"%s\" failed (%s)",
&value[1], "ngx_module_names", ngx_dlerror());
return NGX_CONF_ERROR;
}
order = ngx_dlsym(handle, "ngx_module_order");
for (i = 0; modules[i]; i++) {
module = modules[i];
module->name = names[i];
if (ngx_add_module(cf, &file, module, order) != NGX_OK) {
return NGX_CONF_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_CORE, cf->log, 0, "module: %s i:%ui",
module->name, module->index);
}
return NGX_CONF_OK;
#else
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"load_module\" is not supported "
"on this platform");
return NGX_CONF_ERROR;
#endif
}
#if (NGX_HAVE_DLOPEN)
static void
ngx_unload_module(void *data)
{
void *handle = data;
if (ngx_dlclose(handle) != 0) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
ngx_dlclose_n " failed (%s)", ngx_dlerror());
}
}
#endif
推荐文章
发表评论