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9712a4b3c8
php-src/ext/session/session.c
Thies C. Arntzen 9712a4b3c8 @ - Added output_add_rewrite_var() and output_remove_rewrite_var() to inject 
@   and remove variables from the URL-Rewriter. (thies)
i have also modified the session module to use this - so it doesn't
need to fiddle with the output-system any more
2002-05-03 08:00:41 +00:00

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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Sascha Schumann <sascha@schumann.cx> |
| Andrei Zmievski <andrei@ispi.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#ifdef PHP_WIN32
#include "win32/time.h"
#else
#include <sys/time.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include "php_ini.h"
#include "SAPI.h"
#include "php_session.h"
#include "ext/standard/md5.h"
#include "ext/standard/php_var.h"
#include "ext/standard/datetime.h"
#include "ext/standard/php_lcg.h"
#include "ext/standard/url_scanner_ex.h"
#include "ext/standard/php_rand.h" /* for RAND_MAX */
#include "ext/standard/info.h"
#include "ext/standard/php_smart_str.h"
#include "mod_files.h"
#include "mod_user.h"
/* {{{ session_functions[]
*/
function_entry session_functions[] = {
PHP_FE(session_name, NULL)
PHP_FE(session_module_name, NULL)
PHP_FE(session_save_path, NULL)
PHP_FE(session_id, NULL)
PHP_FE(session_decode, NULL)
PHP_FE(session_register, NULL)
PHP_FE(session_unregister, NULL)
PHP_FE(session_is_registered, NULL)
PHP_FE(session_encode, NULL)
PHP_FE(session_start, NULL)
PHP_FE(session_destroy, NULL)
PHP_FE(session_unset, NULL)
PHP_FE(session_set_save_handler, NULL)
PHP_FE(session_cache_limiter, NULL)
PHP_FE(session_cache_expire, NULL)
PHP_FE(session_set_cookie_params, NULL)
PHP_FE(session_get_cookie_params, NULL)
PHP_FE(session_write_close, NULL)
{NULL, NULL, NULL}
};
/* }}} */
ZEND_DECLARE_MODULE_GLOBALS(ps);
static ps_module *_php_find_ps_module(char *name TSRMLS_DC);
static const ps_serializer *_php_find_ps_serializer(char *name TSRMLS_DC);
static PHP_INI_MH(OnUpdateSaveHandler)
{
PS(mod) = _php_find_ps_module(new_value TSRMLS_CC);
/* Following lines are commented out to prevent bogus error message at
start up. i.e. Save handler modules are not initilzied before Session
module. */
/* if(!PS(mod)) { */
/* php_error(E_ERROR,"Cannot find save handler %s",new_value); */
/* } */
return SUCCESS;
}
static PHP_INI_MH(OnUpdateSerializer)
{
PS(serializer) = _php_find_ps_serializer(new_value TSRMLS_CC);
/* Following lines are commented out to prevent bogus error message at
start up. i.e. Serializer modules are not initilzied before Session
module. */
/* if(!PS(serializer)) { */
/* php_error(E_ERROR,"Cannot find serialization handler %s",new_value); */
/* } */
return SUCCESS;
}
/* {{{ PHP_INI
*/
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("session.save_path", "/tmp", PHP_INI_ALL, OnUpdateString, save_path, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.name", "PHPSESSID", PHP_INI_ALL, OnUpdateString, session_name, php_ps_globals, ps_globals)
PHP_INI_ENTRY("session.save_handler", "files", PHP_INI_ALL, OnUpdateSaveHandler)
STD_PHP_INI_BOOLEAN("session.auto_start", "0", PHP_INI_ALL, OnUpdateBool, auto_start, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.gc_probability", "1", PHP_INI_ALL, OnUpdateInt, gc_probability, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.gc_maxlifetime", "1440", PHP_INI_ALL, OnUpdateInt, gc_maxlifetime, php_ps_globals, ps_globals)
PHP_INI_ENTRY("session.serialize_handler", "php", PHP_INI_ALL, OnUpdateSerializer)
STD_PHP_INI_ENTRY("session.cookie_lifetime", "0", PHP_INI_ALL, OnUpdateInt, cookie_lifetime, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.cookie_path", "/", PHP_INI_ALL, OnUpdateString, cookie_path, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.cookie_domain", "", PHP_INI_ALL, OnUpdateString, cookie_domain, php_ps_globals, ps_globals)
STD_PHP_INI_BOOLEAN("session.cookie_secure", "", PHP_INI_ALL, OnUpdateBool, cookie_secure, php_ps_globals, ps_globals)
STD_PHP_INI_BOOLEAN("session.use_cookies", "1", PHP_INI_ALL, OnUpdateBool, use_cookies, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.referer_check", "", PHP_INI_ALL, OnUpdateString, extern_referer_chk, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.entropy_file", "", PHP_INI_ALL, OnUpdateString, entropy_file, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.entropy_length", "0", PHP_INI_ALL, OnUpdateInt, entropy_length, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.cache_limiter", "nocache", PHP_INI_ALL, OnUpdateString, cache_limiter, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.cache_expire", "180", PHP_INI_ALL, OnUpdateInt, cache_expire, php_ps_globals, ps_globals)
STD_PHP_INI_ENTRY("session.use_trans_sid", "1", PHP_INI_ALL, OnUpdateBool, use_trans_sid, php_ps_globals, ps_globals)
/* Commented out until future discussion */
/* PHP_INI_ENTRY("session.encode_sources", "globals,track", PHP_INI_ALL, NULL) */
PHP_INI_END()
/* }}} */
PS_SERIALIZER_FUNCS(php);
PS_SERIALIZER_FUNCS(php_binary);
#define MAX_SERIALIZERS 10
static ps_serializer ps_serializers[MAX_SERIALIZERS + 1] = {
PS_SERIALIZER_ENTRY(php),
PS_SERIALIZER_ENTRY(php_binary)
};
#define MAX_MODULES 10
static ps_module *ps_modules[MAX_MODULES + 1] = {
ps_files_ptr,
ps_user_ptr
};
PHPAPI int php_session_register_serializer(const char *name,
int (*encode)(PS_SERIALIZER_ENCODE_ARGS),
int (*decode)(PS_SERIALIZER_DECODE_ARGS))
{
int ret = -1;
int i;
for (i = 0; i < MAX_SERIALIZERS; i++) {
if (ps_serializers[i].name == NULL) {
ps_serializers[i].name = name;
ps_serializers[i].encode = encode;
ps_serializers[i].decode = decode;
ps_serializers[i + 1].name = NULL;
ret = 0;
break;
}
}
return ret;
}
PHPAPI int php_session_register_module(ps_module *ptr)
{
int ret = -1;
int i;
for (i = 0; i < MAX_MODULES; i++) {
if (!ps_modules[i]) {
ps_modules[i] = ptr;
ret = 0;
break;
}
}
return ret;
}
PHP_MINIT_FUNCTION(session);
PHP_RINIT_FUNCTION(session);
PHP_MSHUTDOWN_FUNCTION(session);
PHP_RSHUTDOWN_FUNCTION(session);
PHP_MINFO_FUNCTION(session);
static void php_rinit_session_globals(TSRMLS_D);
static void php_rshutdown_session_globals(TSRMLS_D);
static zend_bool php_session_destroy(TSRMLS_D);
zend_module_entry session_module_entry = {
STANDARD_MODULE_HEADER,
"session",
session_functions,
PHP_MINIT(session), PHP_MSHUTDOWN(session),
PHP_RINIT(session), PHP_RSHUTDOWN(session),
PHP_MINFO(session),
NO_VERSION_YET,
STANDARD_MODULE_PROPERTIES
};
#ifdef COMPILE_DL_SESSION
ZEND_GET_MODULE(session)
#endif
typedef struct {
char *name;
void (*func)(TSRMLS_D);
} php_session_cache_limiter_t;
#define CACHE_LIMITER_FUNC(name) static void _php_cache_limiter_##name(TSRMLS_D)
#define CACHE_LIMITER(name) { #name, _php_cache_limiter_##name },
#define ADD_COOKIE(a) sapi_add_header(a, strlen(a), 1);
#define STR_CAT(P,S,I) {\
zval *__p = (P);\
size_t __l = (I);\
ulong __i = Z_STRLEN_P(__p);\
Z_STRLEN_P(__p) += __l;\
Z_STRVAL_P(__p) = (char *)erealloc(Z_STRVAL_P(__p), Z_STRLEN_P(__p) + 1);\
memcpy(Z_STRVAL_P(__p) + __i, (S), __l); \
Z_STRVAL_P(__p)[Z_STRLEN_P(__p)] = '\0'; \
}
#define MAX_STR 512
void php_set_session_var(char *name, size_t namelen, zval *state_val, php_unserialize_data_t *var_hash TSRMLS_DC)
{
if (PG(register_globals)) {
zval **old_symbol;
if (zend_hash_find(&EG(symbol_table),name,namelen+1,(void *)&old_symbol) == SUCCESS) {
/*
There where old one, we need to replace it accurately.
hash_update in zend_set_hash_symbol is not good, because
it will leave referenced variables (such as local instances
of a global variable) dangling.
BTW: if you use register_globals references between
session-vars won't work because of this very reason!
*/
REPLACE_ZVAL_VALUE(old_symbol,state_val,1);
/* the following line will muck with the reference-table used for
* unserialisation
*/
PHP_VAR_UNSERIALIZE_ZVAL_CHANGED(var_hash,state_val,*old_symbol);
zend_set_hash_symbol(*old_symbol, name, namelen, 1, 1, Z_ARRVAL_P(PS(http_session_vars)));
} else {
zend_set_hash_symbol(state_val, name, namelen, 1, 2, Z_ARRVAL_P(PS(http_session_vars)), &EG(symbol_table));
}
} else {
zend_set_hash_symbol(state_val, name, namelen, 0, 1, Z_ARRVAL_P(PS(http_session_vars)));
}
}
int php_get_session_var(char *name, size_t namelen, zval ***state_var TSRMLS_DC)
{
if (PS(http_session_vars)) {
if (zend_hash_find(Z_ARRVAL_P(PS(http_session_vars)), name, namelen+1, (void **) state_var)==SUCCESS) {
return SUCCESS;
}
} else if (!PG(register_globals)) {
/* register_globals is disabled, but we don't have http_session_vars */
return HASH_KEY_NON_EXISTANT;
}
return zend_hash_find(&EG(symbol_table), name, namelen+1, (void **) state_var);
}
#define PS_BIN_NR_OF_BITS 8
#define PS_BIN_UNDEF (1<<(PS_BIN_NR_OF_BITS-1))
#define PS_BIN_MAX (PS_BIN_UNDEF-1)
PS_SERIALIZER_ENCODE_FUNC(php_binary)
{
smart_str buf = {0};
php_serialize_data_t var_hash;
PS_ENCODE_VARS;
PHP_VAR_SERIALIZE_INIT(var_hash);
PS_ENCODE_LOOP(
if (key_length > PS_BIN_MAX) continue;
smart_str_appendc(&buf, (unsigned char) key_length);
smart_str_appendl(&buf, key, key_length);
php_var_serialize(&buf, struc, &var_hash TSRMLS_CC);
} else {
if (key_length > PS_BIN_MAX) continue;
smart_str_appendc(&buf, (unsigned char) (key_length & PS_BIN_UNDEF));
smart_str_appendl(&buf, key, key_length);
);
if (newlen) *newlen = buf.len;
*newstr = buf.c;
PHP_VAR_SERIALIZE_DESTROY(var_hash);
return SUCCESS;
}
PS_SERIALIZER_DECODE_FUNC(php_binary)
{
const char *p;
char *name;
const char *endptr = val + vallen;
zval *current;
int namelen;
int has_value;
php_unserialize_data_t var_hash;
PHP_VAR_UNSERIALIZE_INIT(var_hash);
for (p = val; p < endptr; ) {
namelen = *p & (~PS_BIN_UNDEF);
has_value = *p & PS_BIN_UNDEF ? 0 : 1;
name = estrndup(p + 1, namelen);
p += namelen + 1;
if (has_value) {
MAKE_STD_ZVAL(current);
if (php_var_unserialize(&current, &p, endptr, &var_hash TSRMLS_CC)) {
php_set_session_var(name, namelen, current, &var_hash TSRMLS_CC);
}
zval_ptr_dtor(&current);
}
PS_ADD_VARL(name, namelen);
efree(name);
}
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
return SUCCESS;
}
#define PS_DELIMITER '|'
#define PS_UNDEF_MARKER '!'
PS_SERIALIZER_ENCODE_FUNC(php)
{
smart_str buf = {0};
php_serialize_data_t var_hash;
PS_ENCODE_VARS;
PHP_VAR_SERIALIZE_INIT(var_hash);
PS_ENCODE_LOOP(
if (key_length + 1 > MAX_STR) continue;
smart_str_appendl(&buf, key, (unsigned char) key_length);
smart_str_appendc(&buf, PS_DELIMITER);
php_var_serialize(&buf, struc, &var_hash TSRMLS_CC);
} else {
if (key_length + 2 > MAX_STR) continue;
smart_str_appendc(&buf, PS_UNDEF_MARKER);
smart_str_appendl(&buf, key, key_length);
smart_str_appendc(&buf, PS_DELIMITER);
);
if (newlen) *newlen = buf.len;
*newstr = buf.c;
PHP_VAR_SERIALIZE_DESTROY(var_hash);
return SUCCESS;
}
PS_SERIALIZER_DECODE_FUNC(php)
{
const char *p, *q;
char *name;
const char *endptr = val + vallen;
zval *current;
int namelen;
int has_value;
php_unserialize_data_t var_hash;
PHP_VAR_UNSERIALIZE_INIT(var_hash);
p = val;
while (p < endptr) {
q = p;
while (*q != PS_DELIMITER)
if (++q >= endptr) goto break_outer_loop;
if (p[0] == PS_UNDEF_MARKER) {
p++;
has_value = 0;
} else {
has_value = 1;
}
namelen = q - p;
name = estrndup(p, namelen);
q++;
if (has_value) {
MAKE_STD_ZVAL(current);
if (php_var_unserialize(&current, &q, endptr, &var_hash TSRMLS_CC)) {
php_set_session_var(name, namelen, current, &var_hash TSRMLS_CC);
}
zval_ptr_dtor(&current);
}
PS_ADD_VARL(name, namelen);
efree(name);
p = q;
}
break_outer_loop:
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
return SUCCESS;
}
static void php_session_track_init(TSRMLS_D)
{
zval **old_vars = NULL;
if (zend_hash_find(&EG(symbol_table), "HTTP_SESSION_VARS", sizeof("HTTP_SESSION_VARS"), (void **)&old_vars) == SUCCESS && Z_TYPE_PP(old_vars) == IS_ARRAY) {
PS(http_session_vars) = *old_vars;
zend_hash_clean(Z_ARRVAL_P(PS(http_session_vars)));
} else {
if(old_vars) {
zend_hash_del(&EG(symbol_table), "HTTP_SESSION_VARS", sizeof("HTTP_SESSION_VARS"));
zend_hash_del(&EG(symbol_table), "_SESSION", sizeof("_SESSION"));
}
MAKE_STD_ZVAL(PS(http_session_vars));
array_init(PS(http_session_vars));
PS(http_session_vars)->refcount = 2;
PS(http_session_vars)->is_ref = 1;
zend_hash_update(&EG(symbol_table), "HTTP_SESSION_VARS", sizeof("HTTP_SESSION_VARS"), &PS(http_session_vars), sizeof(zval *), NULL);
zend_hash_update(&EG(symbol_table), "_SESSION", sizeof("_SESSION"), &PS(http_session_vars), sizeof(zval *), NULL);
}
}
static char *php_session_encode(int *newlen TSRMLS_DC)
{
char *ret = NULL;
if (PS(serializer)->encode(&ret, newlen TSRMLS_CC) == FAILURE)
ret = NULL;
return ret;
}
static void php_session_decode(const char *val, int vallen TSRMLS_DC)
{
if (PS(serializer)->decode(val, vallen TSRMLS_CC) == FAILURE) {
php_session_destroy(TSRMLS_C);
php_error(E_WARNING, "Failed to decode session object. Session has been destroyed.");
}
}
static char hexconvtab[] = "0123456789abcdef";
char *php_session_create_id(PS_CREATE_SID_ARGS)
{
PHP_MD5_CTX context;
unsigned char digest[16];
char buf[256];
struct timeval tv;
int i;
int j = 0;
unsigned char c;
gettimeofday(&tv, NULL);
PHP_MD5Init(&context);
sprintf(buf, "%ld%ld%0.8f", tv.tv_sec, tv.tv_usec, php_combined_lcg(TSRMLS_C) * 10);
PHP_MD5Update(&context, buf, strlen(buf));
if (PS(entropy_length) > 0) {
int fd;
fd = VCWD_OPEN(PS(entropy_file), O_RDONLY);
if (fd >= 0) {
unsigned char buf[2048];
int n;
int to_read = PS(entropy_length);
while (to_read > 0) {
n = read(fd, buf, MIN(to_read, sizeof(buf)));
if (n <= 0) break;
PHP_MD5Update(&context, buf, n);
to_read -= n;
}
close(fd);
}
}
PHP_MD5Final(digest, &context);
for (i = 0; i < 16; i++) {
c = digest[i];
buf[j++] = hexconvtab[c >> 4];
buf[j++] = hexconvtab[c & 15];
}
buf[j] = '\0';
if (newlen)
*newlen = j;
return estrdup(buf);
}
static void php_session_initialize(TSRMLS_D)
{
char *val;
int vallen;
/* Open session handler first */
if (PS(mod)->open(&PS(mod_data), PS(save_path), PS(session_name) TSRMLS_CC) == FAILURE) {
php_error(E_ERROR, "Failed to initialize session module");
return;
}
/* If there is no ID, use session module to create one */
if (!PS(id))
PS(id) = PS(mod)->create_sid(&PS(mod_data), NULL TSRMLS_CC);
/* Read data */
/* Question: if you create a SID here, should you also try to read data?
* I'm not sure, but while not doing so will remove one session operation
* it could prove usefull for those sites which wish to have "default"
* session information
*/
php_session_track_init(TSRMLS_C);
if (PS(mod)->read(&PS(mod_data), PS(id), &val, &vallen TSRMLS_CC) == SUCCESS) {
php_session_decode(val, vallen TSRMLS_CC);
efree(val);
}
}
static void php_session_save_current_state(TSRMLS_D)
{
char *val;
int vallen;
int ret = FAILURE;
char *variable;
uint variable_len;
ulong num_key;
HashPosition pos;
if (!PG(register_globals) && !PS(http_session_vars)) {
return;
}
if (PS(http_session_vars)) {
for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(PS(http_session_vars)), &pos);
zend_hash_get_current_key_ex(Z_ARRVAL_P(PS(http_session_vars)), &variable, &variable_len, &num_key, 0, &pos) == HASH_KEY_IS_STRING;
zend_hash_move_forward_ex(Z_ARRVAL_P(PS(http_session_vars)),&pos)) {
PS_ADD_VARL(variable,variable_len-1);
}
}
if (PS(mod_data)) {
val = php_session_encode(&vallen TSRMLS_CC);
if (val) {
ret = PS(mod)->write(&PS(mod_data), PS(id), val, vallen TSRMLS_CC);
efree(val);
} else {
ret = PS(mod)->write(&PS(mod_data), PS(id), "", 0 TSRMLS_CC);
}
}
if (ret == FAILURE)
php_error(E_WARNING, "Failed to write session data (%s). Please "
"verify that the current setting of session.save_path "
"is correct (%s)",
PS(mod)->name,
PS(save_path));
if (PS(mod_data))
PS(mod)->close(&PS(mod_data) TSRMLS_CC);
}
static char *month_names[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
static char *week_days[] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"
};
static void strcpy_gmt(char *ubuf, time_t *when)
{
char buf[MAX_STR];
struct tm tm;
int n;
php_gmtime_r(when, &tm);
/* we know all components, thus it is safe to use sprintf */
n = sprintf(buf, "%s, %d %s %d %02d:%02d:%02d GMT",
week_days[tm.tm_wday], tm.tm_mday,
month_names[tm.tm_mon], tm.tm_year + 1900,
tm.tm_hour, tm.tm_min,
tm.tm_sec);
memcpy(ubuf, buf, n);
ubuf[n] = '\0';
}
static void last_modified(TSRMLS_D)
{
const char *path;
struct stat sb;
char buf[MAX_STR + 1];
path = SG(request_info).path_translated;
if (path) {
if (VCWD_STAT(path, &sb) == -1) {
return;
}
#define LAST_MODIFIED "Last-Modified: "
memcpy(buf, LAST_MODIFIED, sizeof(LAST_MODIFIED) - 1);
strcpy_gmt(buf + sizeof(LAST_MODIFIED) - 1, &sb.st_mtime);
ADD_COOKIE(buf);
}
}
CACHE_LIMITER_FUNC(public)
{
char buf[MAX_STR + 1];
struct timeval tv;
time_t now;
gettimeofday(&tv, NULL);
now = tv.tv_sec + PS(cache_expire) * 60;
#define EXPIRES "Expires: "
memcpy(buf, EXPIRES, sizeof(EXPIRES) - 1);
strcpy_gmt(buf + sizeof(EXPIRES) - 1, &now);
ADD_COOKIE(buf);
sprintf(buf, "Cache-Control: public, max-age=%ld", PS(cache_expire) * 60);
ADD_COOKIE(buf);
last_modified(TSRMLS_C);
}
CACHE_LIMITER_FUNC(private)
{
char buf[MAX_STR + 1];
ADD_COOKIE("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
sprintf(buf, "Cache-Control: private, max-age=%ld, pre-check=%ld", PS(cache_expire) * 60, PS(cache_expire) * 60);
ADD_COOKIE(buf);
last_modified(TSRMLS_C);
}
CACHE_LIMITER_FUNC(private_no_expire)
{
char buf[MAX_STR + 1];
sprintf(buf, "Cache-Control: private, max-age=%ld, pre-check=%ld", PS(cache_expire) * 60, PS(cache_expire) * 60);
ADD_COOKIE(buf);
last_modified(TSRMLS_C);
}
CACHE_LIMITER_FUNC(nocache)
{
ADD_COOKIE("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
/* For HTTP/1.1 conforming clients and the rest (MSIE 5) */
ADD_COOKIE("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
/* For HTTP/1.0 conforming clients */
ADD_COOKIE("Pragma: no-cache");
}
static php_session_cache_limiter_t php_session_cache_limiters[] = {
CACHE_LIMITER(public)
CACHE_LIMITER(private)
CACHE_LIMITER(private_no_expire)
CACHE_LIMITER(nocache)
{0}
};
static int php_session_cache_limiter(TSRMLS_D)
{
php_session_cache_limiter_t *lim;
if (SG(headers_sent)) {
char *output_start_filename = php_get_output_start_filename(TSRMLS_C);
int output_start_lineno = php_get_output_start_lineno(TSRMLS_C);
if (output_start_filename) {
php_error(E_WARNING, "Cannot send session cache limiter - headers already sent (output started at %s:%d)",
output_start_filename, output_start_lineno);
} else {
php_error(E_WARNING, "Cannot send session cache limiter - headers already sent");
}
return (-2);
}
for (lim = php_session_cache_limiters; lim->name; lim++) {
if (!strcasecmp(lim->name, PS(cache_limiter))) {
lim->func(TSRMLS_C);
return (0);
}
}
return (-1);
}
#define COOKIE_SET_COOKIE "Set-Cookie: "
#define COOKIE_EXPIRES "; expires="
#define COOKIE_PATH "; path="
#define COOKIE_DOMAIN "; domain="
#define COOKIE_SECURE "; secure"
static void php_session_send_cookie(TSRMLS_D)
{
smart_str ncookie = {0};
char *date_fmt = NULL;
if (SG(headers_sent)) {
char *output_start_filename = php_get_output_start_filename(TSRMLS_C);
int output_start_lineno = php_get_output_start_lineno(TSRMLS_C);
if (output_start_filename) {
php_error(E_WARNING, "Cannot send session cookie - headers already sent by (output started at %s:%d)",
output_start_filename, output_start_lineno);
} else {
php_error(E_WARNING, "Cannot send session cookie - headers already sent");
}
return;
}
smart_str_appends(&ncookie, COOKIE_SET_COOKIE);
smart_str_appends(&ncookie, PS(session_name));
smart_str_appendc(&ncookie, '=');
smart_str_appends(&ncookie, PS(id));
if (PS(cookie_lifetime) > 0) {
struct timeval tv;
gettimeofday(&tv, NULL);
date_fmt = php_std_date(tv.tv_sec + PS(cookie_lifetime));
smart_str_appends(&ncookie, COOKIE_EXPIRES);
smart_str_appends(&ncookie, date_fmt);
efree(date_fmt);
}
if (PS(cookie_path)[0]) {
smart_str_appends(&ncookie, COOKIE_PATH);
smart_str_appends(&ncookie, PS(cookie_path));
}
if (PS(cookie_domain)[0]) {
smart_str_appends(&ncookie, COOKIE_DOMAIN);
smart_str_appends(&ncookie, PS(cookie_domain));
}
if (PS(cookie_secure)) {
smart_str_appends(&ncookie, COOKIE_SECURE);
}
smart_str_0(&ncookie);
sapi_add_header(ncookie.c, ncookie.len, 0);
}
static ps_module *_php_find_ps_module(char *name TSRMLS_DC)
{
ps_module *ret = NULL;
ps_module **mod;
int i;
for (i = 0, mod = ps_modules; i < MAX_MODULES; i++, mod++)
if (*mod && !strcasecmp(name, (*mod)->name)) {
ret = *mod;
break;
}
return ret;
}
static const ps_serializer *_php_find_ps_serializer(char *name TSRMLS_DC)
{
const ps_serializer *ret = NULL;
const ps_serializer *mod;
for (mod = ps_serializers; mod->name; mod++)
if (!strcasecmp(name, mod->name)) {
ret = mod;
break;
}
return ret;
}
#define PPID2SID \
convert_to_string((*ppid)); \
PS(id) = estrndup(Z_STRVAL_PP(ppid), Z_STRLEN_PP(ppid))
PHPAPI void php_session_start(TSRMLS_D)
{
zval **ppid;
zval **data;
char *p;
int send_cookie = 1;
int define_sid = 1;
int module_number = PS(module_number);
int nrand;
int lensess;
PS(apply_trans_sid) = PS(use_trans_sid);
if (PS(session_status) != php_session_none)
return;
lensess = strlen(PS(session_name));
/*
* Cookies are preferred, because initially
* cookie and get variables will be available.
*/
if (!PS(id)) {
if (zend_hash_find(&EG(symbol_table), "_COOKIE",
sizeof("_COOKIE"), (void **) &data) == SUCCESS &&
Z_TYPE_PP(data) == IS_ARRAY &&
zend_hash_find(Z_ARRVAL_PP(data), PS(session_name),
lensess + 1, (void **) &ppid) == SUCCESS) {
PPID2SID;
PS(apply_trans_sid) = 0;
send_cookie = 0;
define_sid = 0;
}
if (!PS(id) &&
zend_hash_find(&EG(symbol_table), "_GET",
sizeof("_GET"), (void **) &data) == SUCCESS &&
Z_TYPE_PP(data) == IS_ARRAY &&
zend_hash_find(Z_ARRVAL_PP(data), PS(session_name),
lensess + 1, (void **) &ppid) == SUCCESS) {
PPID2SID;
send_cookie = 0;
}
if (!PS(id) &&
zend_hash_find(&EG(symbol_table), "_POST",
sizeof("_POST"), (void **) &data) == SUCCESS &&
Z_TYPE_PP(data) == IS_ARRAY &&
zend_hash_find(Z_ARRVAL_PP(data), PS(session_name),
lensess + 1, (void **) &ppid) == SUCCESS) {
PPID2SID;
send_cookie = 0;
}
}
/* check the REQUEST_URI symbol for a string of the form
'<session-name>=<session-id>' to allow URLs of the form
http://yoursite/<session-name>=<session-id>/script.php */
if (!PS(id) &&
zend_hash_find(&EG(symbol_table), "REQUEST_URI",
sizeof("REQUEST_URI"), (void **) &data) == SUCCESS &&
Z_TYPE_PP(data) == IS_STRING &&
(p = strstr(Z_STRVAL_PP(data), PS(session_name))) &&
p[lensess] == '=') {
char *q;
p += lensess + 1;
if ((q = strpbrk(p, "/?\\")))
PS(id) = estrndup(p, q - p);
}
/* check whether the current request was referred to by
an external site which invalidates the previously found id */
if (PS(id) &&
PS(extern_referer_chk)[0] != '\0' &&
zend_hash_find(&EG(symbol_table), "HTTP_REFERER",
sizeof("HTTP_REFERER"), (void **) &data) == SUCCESS &&
Z_TYPE_PP(data) == IS_STRING &&
Z_STRLEN_PP(data) != 0 &&
strstr(Z_STRVAL_PP(data), PS(extern_referer_chk)) == NULL) {
efree(PS(id));
PS(id) = NULL;
send_cookie = 1;
if (PS(use_trans_sid))
PS(apply_trans_sid) = 1;
}
php_session_initialize(TSRMLS_C);
if (!PS(use_cookies) && send_cookie) {
if (PS(use_trans_sid))
PS(apply_trans_sid) = 1;
send_cookie = 0;
}
if (send_cookie) {
php_session_send_cookie(TSRMLS_C);
}
if (define_sid) {
smart_str var = {0};
smart_str_appendl(&var, PS(session_name), lensess);
smart_str_appendc(&var, '=');
smart_str_appends(&var, PS(id));
smart_str_0(&var);
REGISTER_STRINGL_CONSTANT("SID", var.c, var.len, 0);
} else {
REGISTER_STRINGL_CONSTANT("SID", empty_string, 0, 0);
}
PS(session_status) = php_session_active;
if (PS(apply_trans_sid)) {
php_url_scanner_add_var(PS(session_name), strlen(PS(session_name)), PS(id), strlen(PS(id)), 0);
}
php_session_cache_limiter(TSRMLS_C);
if (PS(mod_data) && PS(gc_probability) > 0) {
int nrdels = -1;
nrand = (int) (100.0*php_combined_lcg(TSRMLS_C));
if (nrand < PS(gc_probability)) {
PS(mod)->gc(&PS(mod_data), PS(gc_maxlifetime), &nrdels TSRMLS_CC);
#if 0
if (nrdels != -1)
php_error(E_NOTICE, "purged %d expired session objects\n", nrdels);
#endif
}
}
}
static zend_bool php_session_destroy(TSRMLS_D)
{
zend_bool retval = SUCCESS;
if (PS(session_status) != php_session_active) {
php_error(E_WARNING, "Trying to destroy uninitialized session");
return FAILURE;
}
if (PS(mod)->destroy(&PS(mod_data), PS(id) TSRMLS_CC) == FAILURE) {
retval = FAILURE;
php_error(E_WARNING, "Session object destruction failed");
}
php_rshutdown_session_globals(TSRMLS_C);
php_rinit_session_globals(TSRMLS_C);
return retval;
}
/* {{{ proto void session_set_cookie_params(int lifetime [, string path [, string domain [, bool secure]]])
Set session cookie parameters */
PHP_FUNCTION(session_set_cookie_params)
{
zval **lifetime, **path, **domain, **secure;
if (!PS(use_cookies))
return;
if (ZEND_NUM_ARGS() < 1 || ZEND_NUM_ARGS() > 4 ||
zend_get_parameters_ex(ZEND_NUM_ARGS(), &lifetime, &path, &domain, &secure) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_long_ex(lifetime);
PS(cookie_lifetime) = Z_LVAL_PP(lifetime);
if (ZEND_NUM_ARGS() > 1) {
convert_to_string_ex(path);
zend_alter_ini_entry("session.cookie_path", sizeof("session.cookie_path"), Z_STRVAL_PP(path), Z_STRLEN_PP(path), PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
if (ZEND_NUM_ARGS() > 2) {
convert_to_string_ex(domain);
zend_alter_ini_entry("session.cookie_domain", sizeof("session.cookie_domain"), Z_STRVAL_PP(domain), Z_STRLEN_PP(domain), PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
if (ZEND_NUM_ARGS() > 3) {
convert_to_long_ex(secure);
zend_alter_ini_entry("session.cookie_secure", sizeof("session.cookie_secure"), Z_BVAL_PP(secure)?"1":"0", 1, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
}
}
}
}
/* }}} */
/* {{{ proto array session_get_cookie_params(void)
Return the session cookie parameters */
PHP_FUNCTION(session_get_cookie_params)
{
if (ZEND_NUM_ARGS() != 0) {
WRONG_PARAM_COUNT;
}
if (array_init(return_value) == FAILURE) {
php_error(E_ERROR, "Cannot initialize return value from session_get_cookie_parameters");
RETURN_FALSE;
}
add_assoc_long(return_value, "lifetime", PS(cookie_lifetime));
add_assoc_string(return_value, "path", PS(cookie_path), 1);
add_assoc_string(return_value, "domain", PS(cookie_domain), 1);
add_assoc_bool(return_value, "secure", PS(cookie_secure));
}
/* }}} */
/* {{{ proto string session_name([string newname])
Return the current session name. If newname is given, the session name is replaced with newname */
PHP_FUNCTION(session_name)
{
zval **p_name;
int ac = ZEND_NUM_ARGS();
char *old;
if (ac < 0 || ac > 1 || zend_get_parameters_ex(ac, &p_name) == FAILURE)
WRONG_PARAM_COUNT;
old = estrdup(PS(session_name));
if (ac == 1) {
convert_to_string_ex(p_name);
zend_alter_ini_entry("session.name", sizeof("session.name"), Z_STRVAL_PP(p_name), Z_STRLEN_PP(p_name), PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
}
RETVAL_STRING(old, 0);
}
/* }}} */
/* {{{ proto string session_module_name([string newname])
Return the current module name used for accessing session data. If newname is given, the module name is replaced with newname */
PHP_FUNCTION(session_module_name)
{
zval **p_name;
int ac = ZEND_NUM_ARGS();
char *old;
if (ac < 0 || ac > 1 || zend_get_parameters_ex(ac, &p_name) == FAILURE)
WRONG_PARAM_COUNT;
old = safe_estrdup(PS(mod)->name);
if (ac == 1) {
ps_module *tempmod;
convert_to_string_ex(p_name);
tempmod = _php_find_ps_module(Z_STRVAL_PP(p_name) TSRMLS_CC);
if (tempmod) {
if (PS(mod_data))
PS(mod)->close(&PS(mod_data) TSRMLS_CC);
PS(mod) = tempmod;
PS(mod_data) = NULL;
} else {
efree(old);
php_error(E_ERROR, "Cannot find named PHP session module (%s)",
Z_STRVAL_PP(p_name));
RETURN_FALSE;
}
}
RETVAL_STRING(old, 0);
}
/* }}} */
/* {{{ proto void session_set_save_handler(string open, string close, string read, string write, string destroy, string gc)
Sets user-level functions */
PHP_FUNCTION(session_set_save_handler)
{
zval **args[6];
int i;
ps_user *mdata;
if (ZEND_NUM_ARGS() != 6 || zend_get_parameters_array_ex(6, args) == FAILURE)
WRONG_PARAM_COUNT;
if (PS(session_status) != php_session_none)
RETURN_FALSE;
zend_alter_ini_entry("session.save_handler", sizeof("session.save_handler"), "user", sizeof("user")-1, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
mdata = emalloc(sizeof(*mdata));
for (i = 0; i < 6; i++) {
ZVAL_ADDREF(*args[i]);
mdata->names[i] = *args[i];
}
PS(mod_data) = (void *) mdata;
RETURN_TRUE;
}
/* }}} */
/* {{{ proto string session_save_path([string newname])
Return the current save path passed to module_name. If newname is given, the save path is replaced with newname */
PHP_FUNCTION(session_save_path)
{
zval **p_name;
int ac = ZEND_NUM_ARGS();
char *old;
if (ac < 0 || ac > 1 || zend_get_parameters_ex(ac, &p_name) == FAILURE)
WRONG_PARAM_COUNT;
old = estrdup(PS(save_path));
if (ac == 1) {
convert_to_string_ex(p_name);
zend_alter_ini_entry("session.save_path", sizeof("session.save_path"), Z_STRVAL_PP(p_name), Z_STRLEN_PP(p_name), PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
}
RETVAL_STRING(old, 0);
}
/* }}} */
/* {{{ proto string session_id([string newid])
Return the current session id. If newid is given, the session id is replaced with newid */
PHP_FUNCTION(session_id)
{
zval **p_name;
int ac = ZEND_NUM_ARGS();
char *old = empty_string;
if (ac < 0 || ac > 1 || zend_get_parameters_ex(ac, &p_name) == FAILURE)
WRONG_PARAM_COUNT;
if (PS(id))
old = estrdup(PS(id));
if (ac == 1) {
convert_to_string_ex(p_name);
if (PS(id)) efree(PS(id));
PS(id) = estrndup(Z_STRVAL_PP(p_name), Z_STRLEN_PP(p_name));
}
RETVAL_STRING(old, 0);
}
/* }}} */
/* {{{ proto string session_cache_limiter([string new_cache_limiter])
Return the current cache limiter. If new_cache_limited is given, the current cache_limiter is replaced with new_cache_limiter */
PHP_FUNCTION(session_cache_limiter)
{
zval **p_cache_limiter;
int ac = ZEND_NUM_ARGS();
char *old;
if (ac < 0 || ac > 1 || zend_get_parameters_ex(ac, &p_cache_limiter) == FAILURE)
WRONG_PARAM_COUNT;
old = estrdup(PS(cache_limiter));
if (ac == 1) {
convert_to_string_ex(p_cache_limiter);
zend_alter_ini_entry("session.cache_limiter", sizeof("session.cache_limiter"), Z_STRVAL_PP(p_cache_limiter), Z_STRLEN_PP(p_cache_limiter), PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
}
RETVAL_STRING(old, 0);
}
/* }}} */
/* {{{ proto int session_cache_expire([int new_cache_expire])
Return the current cache expire. If new_cache_expire is given, the current cache_expire is replaced with new_cache_expire */
PHP_FUNCTION(session_cache_expire)
{
zval **p_cache_expire;
int ac = ZEND_NUM_ARGS();
long old;
old = PS(cache_expire);
if (ac < 0 || ac > 1 || zend_get_parameters_ex(ac, &p_cache_expire) == FAILURE)
WRONG_PARAM_COUNT;
if (ac == 1) {
convert_to_long_ex(p_cache_expire);
PS(cache_expire) = Z_LVAL_PP(p_cache_expire);
}
RETVAL_LONG(old);
}
/* }}} */
/* {{{ static void php_register_var(zval** entry TSRMLS_DC) */
static void php_register_var(zval** entry TSRMLS_DC)
{
zval **value;
if (Z_TYPE_PP(entry) == IS_ARRAY) {
zend_hash_internal_pointer_reset(Z_ARRVAL_PP(entry));
while (zend_hash_get_current_data(Z_ARRVAL_PP(entry), (void**)&value) == SUCCESS) {
php_register_var(value TSRMLS_CC);
zend_hash_move_forward(Z_ARRVAL_PP(entry));
}
} else {
convert_to_string_ex(entry);
if ((strcmp(Z_STRVAL_PP(entry), "HTTP_SESSION_VARS") != 0) ||
(strcmp(Z_STRVAL_PP(entry), "_SESSION") != 0)) {
PS_ADD_VARL(Z_STRVAL_PP(entry), Z_STRLEN_PP(entry));
}
}
}
/* }}} */
/* {{{ proto bool session_register(mixed var_names [, mixed ...])
Adds varname(s) to the list of variables which are freezed at the session end */
PHP_FUNCTION(session_register)
{
zval ***args;
int argc = ZEND_NUM_ARGS();
int i;
if (argc <= 0)
RETURN_FALSE
else
args = (zval ***)emalloc(argc * sizeof(zval **));
if (zend_get_parameters_array_ex(argc, args) == FAILURE) {
efree(args);
WRONG_PARAM_COUNT;
}
if (PS(session_status) == php_session_none)
php_session_start(TSRMLS_C);
for (i = 0; i < argc; i++) {
if (Z_TYPE_PP(args[i]) == IS_ARRAY)
SEPARATE_ZVAL(args[i]);
php_register_var(args[i] TSRMLS_CC);
}
efree(args);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool session_unregister(string varname)
Removes varname from the list of variables which are freezed at the session end */
PHP_FUNCTION(session_unregister)
{
zval **p_name;
int ac = ZEND_NUM_ARGS();
if (ac != 1 || zend_get_parameters_ex(ac, &p_name) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_string_ex(p_name);
PS_DEL_VARL(Z_STRVAL_PP(p_name), Z_STRLEN_PP(p_name));
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool session_is_registered(string varname)
Checks if a variable is registered in session */
PHP_FUNCTION(session_is_registered)
{
zval **p_name;
zval *p_var;
int ac = ZEND_NUM_ARGS();
if (ac != 1 || zend_get_parameters_ex(ac, &p_name) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_string_ex(p_name);
if (zend_hash_find(&PS(vars), Z_STRVAL_PP(p_name),
Z_STRLEN_PP(p_name)+1, (void **)&p_var) == SUCCESS)
RETURN_TRUE
else
RETURN_FALSE;
}
/* }}} */
/* {{{ proto string session_encode(void)
Serializes the current setup and returns the serialized representation */
PHP_FUNCTION(session_encode)
{
int len;
char *enc;
if (ZEND_NUM_ARGS() != 0) {
WRONG_PARAM_COUNT;
}
enc = php_session_encode(&len TSRMLS_CC);
RETVAL_STRINGL(enc, len, 0);
}
/* }}} */
/* {{{ proto bool session_decode(string data)
Deserializes data and reinitializes the variables */
PHP_FUNCTION(session_decode)
{
zval **str;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &str) == FAILURE)
WRONG_PARAM_COUNT;
convert_to_string_ex(str);
php_session_decode(Z_STRVAL_PP(str), Z_STRLEN_PP(str) TSRMLS_CC);
}
/* }}} */
/* {{{ proto bool session_start(void)
Begin session - reinitializes freezed variables, registers browsers etc */
PHP_FUNCTION(session_start)
{
/* skipping check for non-zero args for performance reasons here ?*/
php_session_start(TSRMLS_C);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool session_destroy(void)
Destroy the current session and all data associated with it */
PHP_FUNCTION(session_destroy)
{
if (ZEND_NUM_ARGS() != 0) {
WRONG_PARAM_COUNT;
}
if (php_session_destroy(TSRMLS_C) == SUCCESS) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto void session_unset(void)
Unset all registered variables */
PHP_FUNCTION(session_unset)
{
zval **tmp;
char *variable;
ulong num_key;
if (PS(session_status) == php_session_none)
RETURN_FALSE;
if (PG(register_globals)) {
for (zend_hash_internal_pointer_reset(&PS(vars));
zend_hash_get_current_key(&PS(vars), &variable, &num_key, 0) == HASH_KEY_IS_STRING;
zend_hash_move_forward(&PS(vars))) {
if (zend_hash_find(&EG(symbol_table), variable, strlen(variable) + 1, (void **) &tmp)
== SUCCESS)
zend_hash_del(&EG(symbol_table), variable, strlen(variable) + 1);
}
}
/* Clean $HTTP_SESSION_VARS. */
zend_hash_clean(Z_ARRVAL_P(PS(http_session_vars)));
}
/* }}} */
static void php_rinit_session_globals(TSRMLS_D)
{
zend_hash_init(&PS(vars), 0, NULL, NULL, 0);
php_url_scanner_remove_var(PS(session_name), strlen(PS(session_name))); /* save even if we haven't registered */
PS(id) = NULL;
PS(session_status) = php_session_none;
PS(mod_data) = NULL;
PS(http_session_vars) = NULL;
}
static void php_rshutdown_session_globals(TSRMLS_D)
{
if (PS(mod_data)) {
PS(mod)->close(&PS(mod_data) TSRMLS_CC);
}
if (PS(id)) {
efree(PS(id));
}
zend_hash_destroy(&PS(vars));
}
PHP_RINIT_FUNCTION(session)
{
php_rinit_session_globals(TSRMLS_C);
if (PS(mod) == NULL) {
char *value;
value = zend_ini_string("session.save_handler", sizeof("session.save_handler"), 0);
if (value) {
PS(mod) = _php_find_ps_module(value TSRMLS_CC);
}
if (!PS(mod)) {
/* current status is unusable */
PS(session_status) = php_session_disabled;
return SUCCESS;
}
}
if (PS(auto_start)) {
php_session_start(TSRMLS_C);
}
return SUCCESS;
}
static void php_session_flush(TSRMLS_D)
{
if(PS(session_status)==php_session_active) {
php_session_save_current_state(TSRMLS_C);
PS(session_status)=php_session_none;
}
}
/* {{{ proto void session_write_close(void)
Write session data and end session */
PHP_FUNCTION(session_write_close)
{
php_session_flush(TSRMLS_C);
}
PHP_RSHUTDOWN_FUNCTION(session)
{
php_session_flush(TSRMLS_C);
php_rshutdown_session_globals(TSRMLS_C);
return SUCCESS;
}
/* }}} */
PHP_MINIT_FUNCTION(session)
{
#ifdef ZTS
php_ps_globals *ps_globals;
ts_allocate_id(&ps_globals_id, sizeof(php_ps_globals), NULL, NULL);
ps_globals = ts_resource(ps_globals_id);
#endif
zend_register_auto_global("_SESSION", sizeof("_SESSION")-1 TSRMLS_CC);
PS(module_number) = module_number;
REGISTER_INI_ENTRIES();
return SUCCESS;
}
PHP_MSHUTDOWN_FUNCTION(session)
{
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
PHP_MINFO_FUNCTION(session)
{
php_info_print_table_start();
php_info_print_table_row(2, "Session Support", "enabled" );
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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