diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c index 206d06e51..0dbe8b01d 100644 --- a/src/http/ngx_http_core_module.c +++ b/src/http/ngx_http_core_module.c @@ -76,6 +76,10 @@ static ngx_uint_t ngx_http_gzip_quantity(u_char *p, u_char *last); static char *ngx_http_gzip_disable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); #endif +#if (NGX_HAVE_OPENAT) +static char *ngx_http_disable_symlinks(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +#endif static char *ngx_http_core_lowat_check(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_core_pool_size(ngx_conf_t *cf, void *post, void *data); @@ -187,18 +191,6 @@ static ngx_str_t ngx_http_gzip_private = ngx_string("private"); #endif -#if (NGX_HAVE_OPENAT) - -static ngx_conf_enum_t ngx_http_core_disable_symlinks[] = { - { ngx_string("off"), NGX_DISABLE_SYMLINKS_OFF }, - { ngx_string("if_not_owner"), NGX_DISABLE_SYMLINKS_NOTOWNER }, - { ngx_string("on"), NGX_DISABLE_SYMLINKS_ON }, - { ngx_null_string, 0 } -}; - -#endif - - static ngx_command_t ngx_http_core_commands[] = { { ngx_string("variables_hash_max_size"), @@ -779,11 +771,11 @@ static ngx_command_t ngx_http_core_commands[] = { #if (NGX_HAVE_OPENAT) { ngx_string("disable_symlinks"), - NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, - ngx_conf_set_enum_slot, + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12, + ngx_http_disable_symlinks, NGX_HTTP_LOC_CONF_OFFSET, - offsetof(ngx_http_core_loc_conf_t, disable_symlinks), - &ngx_http_core_disable_symlinks }, + 0, + NULL }, #endif @@ -2652,7 +2644,45 @@ ngx_http_set_disable_symlinks(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, ngx_str_t *path, ngx_open_file_info_t *of) { #if (NGX_HAVE_OPENAT) + u_char *p; + ngx_str_t from; + of->disable_symlinks = clcf->disable_symlinks; + + if (clcf->disable_symlinks_from == NULL) { + return NGX_OK; + } + + if (ngx_http_complex_value(r, clcf->disable_symlinks_from, &from) + != NGX_OK) + { + return NGX_ERROR; + } + + if (from.len == 0 + || from.len > path->len + || ngx_memcmp(path->data, from.data, from.len) != 0) + { + return NGX_OK; + } + + if (from.len == path->len) { + of->disable_symlinks = NGX_DISABLE_SYMLINKS_OFF; + return NGX_OK; + } + + p = path->data + from.len; + + if (*p == '/') { + of->disable_symlinks_from = from.len; + return NGX_OK; + } + + p--; + + if (*p == '/') { + of->disable_symlinks_from = from.len - 1; + } #endif return NGX_OK; @@ -3389,6 +3419,7 @@ ngx_http_core_create_loc_conf(ngx_conf_t *cf) #if (NGX_HAVE_OPENAT) clcf->disable_symlinks = NGX_CONF_UNSET_UINT; + clcf->disable_symlinks_from = NGX_CONF_UNSET_PTR; #endif return clcf; @@ -3673,6 +3704,8 @@ ngx_http_core_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) #if (NGX_HAVE_OPENAT) ngx_conf_merge_uint_value(conf->disable_symlinks, prev->disable_symlinks, NGX_DISABLE_SYMLINKS_OFF); + ngx_conf_merge_ptr_value(conf->disable_symlinks_from, + prev->disable_symlinks_from, NULL); #endif return NGX_CONF_OK; @@ -4808,6 +4841,100 @@ ngx_http_gzip_disable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) #endif +#if (NGX_HAVE_OPENAT) + +static char * +ngx_http_disable_symlinks(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_http_core_loc_conf_t *clcf = conf; + + ngx_str_t *value; + ngx_uint_t i; + ngx_http_compile_complex_value_t ccv; + + if (clcf->disable_symlinks != NGX_CONF_UNSET_UINT) { + return "is duplicate"; + } + + value = cf->args->elts; + + for (i = 1; i < cf->args->nelts; i++) { + + if (ngx_strcmp(value[i].data, "off") == 0) { + clcf->disable_symlinks = NGX_DISABLE_SYMLINKS_OFF; + continue; + } + + if (ngx_strcmp(value[i].data, "if_not_owner") == 0) { + clcf->disable_symlinks = NGX_DISABLE_SYMLINKS_NOTOWNER; + continue; + } + + if (ngx_strcmp(value[i].data, "on") == 0) { + clcf->disable_symlinks = NGX_DISABLE_SYMLINKS_ON; + continue; + } + + if (ngx_strncmp(value[i].data, "from=", 5) == 0) { + value[i].len -= 5; + value[i].data += 5; + + ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); + + ccv.cf = cf; + ccv.value = &value[i]; + ccv.complex_value = ngx_palloc(cf->pool, + sizeof(ngx_http_complex_value_t)); + if (ccv.complex_value == NULL) { + return NGX_CONF_ERROR; + } + + if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { + return NGX_CONF_ERROR; + } + + clcf->disable_symlinks_from = ccv.complex_value; + + continue; + } + + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "invalid parameter \"%V\"", &value[i]); + return NGX_CONF_ERROR; + } + + if (clcf->disable_symlinks == NGX_CONF_UNSET_UINT) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "\"%V\" must have \"off\", \"on\" " + "or \"if_not_owner\" parameter", + &cmd->name); + return NGX_CONF_ERROR; + } + + if (cf->args->nelts == 2) { + clcf->disable_symlinks_from = NULL; + return NGX_CONF_OK; + } + + if (clcf->disable_symlinks_from == NGX_CONF_UNSET_PTR) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "duplicate parameters \"%V %V\"", + &value[1], &value[2]); + return NGX_CONF_ERROR; + } + + if (clcf->disable_symlinks == NGX_DISABLE_SYMLINKS_OFF) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "\"from=\" cannot be used with \"off\" parameter"); + return NGX_CONF_ERROR; + } + + return NGX_CONF_OK; +} + +#endif + + static char * ngx_http_core_lowat_check(ngx_conf_t *cf, void *post, void *data) { diff --git a/src/http/ngx_http_core_module.h b/src/http/ngx_http_core_module.h index 96b20ec07..bfa0b419e 100644 --- a/src/http/ngx_http_core_module.h +++ b/src/http/ngx_http_core_module.h @@ -406,6 +406,7 @@ struct ngx_http_core_loc_conf_s { #if (NGX_HAVE_OPENAT) ngx_uint_t disable_symlinks; /* disable_symlinks */ + ngx_http_complex_value_t *disable_symlinks_from; #endif ngx_array_t *error_pages; /* error_page */