--- fpm_main.c.orig     2012-08-11 17:38:39.000000000 +0700
+++ fpm_main.c  2012-08-11 20:20:03.000000000 +0700
@@ -162,6 +162,7 @@
        zend_bool rfc2616_headers;
        zend_bool nph;
        zend_bool fix_pathinfo;
+       char *fix_chrootpath;
        zend_bool force_redirect;
        zend_bool discard_path;
        zend_bool fcgi_logging;
@@ -1053,6 +1054,27 @@
        char *ini;
        int apache_was_here = 0;

+       if (CGIG(fix_chrootpath)) {
+               size_t chroot_len = strlen(CGIG(fix_chrootpath));
+               /* remove trail slash */
+               while (chroot_len > 0 && CGIG(fix_chrootpath)[chroot_len-1] == '/') {
+                       chroot_len--;
+               }
+               if (chroot_len > 0) {
+                       char *env_document_root = sapi_cgibin_getenv("DOCUMENT_ROOT", sizeof("DOCUMENT_ROOT") - 1 TSRMLS_CC);
+
+                       if (strncmp(env_path_translated, CGIG(fix_chrootpath), chroot_len) == 0) {
+                               env_path_translated += chroot_len;
+                               env_path_translated = _sapi_cgibin_putenv("PATH_TRANSLATED", env_path_translated TSRMLS_CC);
+                       }
+
+                       if (strncmp(env_document_root, CGIG(fix_chrootpath), chroot_len) == 0) {
+                               env_document_root += chroot_len;
+                               env_document_root = _sapi_cgibin_putenv("DOCUMENT_ROOT", env_document_root TSRMLS_CC);
+                       }
+               }
+       }
+
        /* some broken servers do not have script_filename or argv0
         * an example, IIS configured in some ways.  then they do more
         * broken stuff and set path_translated to the cgi script location */
@@ -1437,6 +1459,7 @@
        STD_PHP_INI_ENTRY("cgi.force_redirect",      "1",  PHP_INI_SYSTEM, OnUpdateBool,   force_redirect, php_cgi_globals_struct, php_cgi_globals)
        STD_PHP_INI_ENTRY("cgi.redirect_status_env", NULL, PHP_INI_SYSTEM, OnUpdateString, redirect_status_env, php_cgi_globals_struct, php_cgi_globals)
        STD_PHP_INI_ENTRY("cgi.fix_pathinfo",        "1",  PHP_INI_SYSTEM, OnUpdateBool,   fix_pathinfo, php_cgi_globals_struct, php_cgi_globals)
+       STD_PHP_INI_ENTRY("cgi.fix_chrootpath",      NULL, PHP_INI_SYSTEM, OnUpdateString, fix_chrootpath, php_cgi_globals_struct, php_cgi_globals)
        STD_PHP_INI_ENTRY("cgi.discard_path",        "0",  PHP_INI_SYSTEM, OnUpdateBool,   discard_path, php_cgi_globals_struct, php_cgi_globals)
        STD_PHP_INI_ENTRY("fastcgi.logging",         "1",  PHP_INI_SYSTEM, OnUpdateBool,   fcgi_logging, php_cgi_globals_struct, php_cgi_globals)
        STD_PHP_INI_ENTRY("fastcgi.error_header",    NULL, PHP_INI_SYSTEM, OnUpdateString, error_header, php_cgi_globals_struct, php_cgi_globals)
@@ -1452,6 +1475,7 @@
        php_cgi_globals->force_redirect = 1;
        php_cgi_globals->redirect_status_env = NULL;
        php_cgi_globals->fix_pathinfo = 1;
+       php_cgi_globals->fix_chrootpath = NULL;
        php_cgi_globals->discard_path = 0;
        php_cgi_globals->fcgi_logging = 1;
        zend_hash_init(&php_cgi_globals->user_config_cache, 0, NULL, (dtor_func_t) user_config_cache_entry_dtor, 1);