diff -r 99a34860c105 -r d938228c382e src/server/daemon/srvctrl.c
--- a/src/server/daemon/srvctrl.c	Wed Nov 02 19:19:01 2022 +0100
+++ b/src/server/daemon/srvctrl.c	Sun Nov 06 15:53:32 2022 +0100
@@ -37,22 +37,23 @@
 
 #include "../util/systhr.h"
 
-#include <ucx/utils.h>
-#include <ucx/buffer.h>
+#include <cx/utils.h>
+#include <cx/buffer.h>
+#include <cx/printf.h>
 
 #include "srvctrl.h"
 
 #define SRVCTRL_THREAD_STACKSIZE 8192
 
 static int srvctrl;
-static sstr_t srvctrl_path;
+static cxmutstr srvctrl_path;
 
 static WSBool srv_shutdown;
 
 int srvctrl_init(ServerConfiguration *cfg) {
     // create srvctrl unix domain socket
     // this socket is used for stop, reconfigure and other operations
-    srvctrl_path = ucx_sprintf("%s/private/srvctrl.sock", cfg->tmp.ptr);
+    srvctrl_path = cx_asprintf("%s/private/srvctrl.sock", cfg->tmp.ptr);
     struct sockaddr_un addr;
     if(srvctrl_path.length > sizeof(addr.sun_path)-1) {
         log_ereport(
@@ -148,7 +149,8 @@
     log_add_logdup(&log);
     
     char buf[64];
-    UcxBuffer *line = ucx_buffer_new(NULL, 32, UCX_BUFFER_AUTOEXTEND);
+    CxBuffer line;
+    cxBufferInit(&line, NULL, 32, cxDefaultAllocator, CX_BUFFER_AUTO_EXTEND|CX_BUFFER_FREE_CONTENTS);
     
     ssize_t r;
     WSBool br = FALSE;
@@ -156,13 +158,13 @@
         for(int i=0;i<r;i++) {
             char c = buf[i];
             if(c == '\n') {
-                sstr_t ln = sstrn(line->space, line->pos);
+                cxmutstr ln = cx_mutstrn(line.space, line.pos);
                 if(srvctrl_handle_cmd(client, ln)) {
                     br = TRUE;
                     break;
                 }
             } else {
-                ucx_buffer_putc(line, c);
+                cxBufferPut(&line, c);
             }
         }
         if(br) {
@@ -171,25 +173,25 @@
     }
     log_remove_logdup(&log);
     
-    ucx_buffer_free(line);
+    cxBufferDestroy(&line);
     close(client->fd);
     free(client);
     return NULL;
 }
 
-int srvctrl_handle_cmd(SrvCtrlClient *client, sstr_t cmd) {
-    if(!sstrcmp(cmd, S("reconfig"))) {
+int srvctrl_handle_cmd(SrvCtrlClient *client, cxmutstr cmd) {
+    if(!cx_strcmp(cx_strcast(cmd), cx_str("reconfig"))) {
         log_ereport(LOG_INFORM, "reconfigure server");
         if(webserver_reconfig()) {
             log_ereport(LOG_FAILURE, "cannot reload config");
         } else {
             log_ereport(LOG_INFORM, "reconfig: success");
         }
-    } else if(!sstrcmp(cmd, S("shutdown"))) {
+    } else if(!cx_strcmp(cx_strcast(cmd), cx_str("shutdown"))) {
         webserver_shutdown();
-    } else if(!sstrcmp(cmd, S("stat"))) {
+    } else if(!cx_strcmp(cx_strcast(cmd), cx_str("stat"))) {
         // TODO: implement
-    } else if(!sstrcmp(cmd, S("log"))) {
+    } else if(!cx_strcmp(cx_strcast(cmd), cx_str("log"))) {
         return 0;
     } else {
         log_ereport(