--- ./b/server/mpm/peruser/peruser.c	2025-02-26 18:20:46.038158495 +0200
+++ ./j/server/mpm/peruser/peruser.c	2025-02-26 18:21:38.232908991 +0200
@@ -141,6 +141,8 @@
 #include "cpu_usage.h"
 #endif
 
+#include <errno.h>
+
 #ifdef MPM_PERUSER_DEBUG
 # define _DBG(text,par...) \
     ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, \
@@ -704,11 +706,11 @@
 
         if (ap_my_generation != ap_scoreboard_image->global->running_generation)
         {
-            ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, msg);
+	    ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, "%s", msg);
             clean_child_exit(0);
         }
         else {
-            ap_log_error(APLOG_MARK, APLOG_EMERG, rv, NULL, msg);
+	    ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, "%s", msg);
             exit(APEXIT_CHILDFATAL);
         }
     }
@@ -722,14 +724,14 @@
 
         if (ap_my_generation != ap_scoreboard_image->global->running_generation)
         {
-            ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, msg);
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL,"%s", msg);
             /* don't exit here... we have a connection to
              * process, after which point we'll see that the
              * generation changed and we'll exit cleanly
              */
         }
         else {
-            ap_log_error(APLOG_MARK, APLOG_EMERG, rv, NULL, msg);
+	    ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, "%s", msg);
             exit(APEXIT_CHILDFATAL);
         }
     }
@@ -1913,7 +1915,12 @@
     _DBG("function called");
 
     if (senv->nice_lvl != 0) {
-        nice(senv->nice_lvl);
+	errno = 0;
+        if (nice(senv->nice_lvl) == -1 && errno != 0) {
+    	    ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL,
+                         "nice: unable to change nice level to :%d",
+                         senv->nice_lvl);
+        }
     }
 
     if (senv->chroot) {
@@ -2954,8 +2961,9 @@
                                  ap_server_root_relative(_pconf, ap_lock_fname),
                                  ap_my_pid);
 
+    ap_unixd_mpm_set_accept_mutex_mech("default", _pconf);
     rv = apr_proc_mutex_create(&accept_mutex, ap_lock_fname,
-                               ap_accept_lock_mech, _pconf);
+                               APR_LOCK_DEFAULT, _pconf);
     if (rv != APR_SUCCESS) {
         ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
                      "Couldn't create accept lock");
@@ -2963,12 +2971,7 @@
         return 1;
     }
 
-#if APR_USE_SYSVSEM_SERIALIZE
-    if (ap_accept_lock_mech == APR_LOCK_DEFAULT ||
-            ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
-#else
-    if (ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
-#endif
+    if (ap_unixd_mpm_set_accept_mutex_mech("sysvsem", _pconf) == APR_SUCCESS) {
         rv = ap_unixd_set_proc_mutex_perms(accept_mutex);
         if (rv != APR_SUCCESS) {
             ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
@@ -3586,7 +3589,7 @@
             }
         }
     } else {
-        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, r);
+        //ap_log_error(APLOG_MARK, APLOG_STARTUP, NULL, "%s", (char *)r);
         return -1;
     }
 
@@ -4642,8 +4645,17 @@
     return NULL;
 }
 
-static const command_rec peruser_cmds[] = { UNIX_DAEMON_COMMANDS,
-LISTEN_COMMANDS,
+extern const char *unixd_set_user(cmd_parms *cmd, void *dummy, const char *arg);
+extern const char *unixd_set_group(cmd_parms *cmd, void *dummy, const char *arg);
+extern const char *unixd_set_chroot_dir(cmd_parms *cmd, void *dummy, const char *arg);
+
+static const command_rec peruser_cmds[] = { LISTEN_COMMANDS,
+AP_INIT_TAKE1("User", unixd_set_user, NULL, RSRC_CONF,
+  "Effective user id for this server"), 
+AP_INIT_TAKE1("Group", unixd_set_group, NULL, RSRC_CONF, 
+  "Effective group id for this server"), 
+AP_INIT_TAKE1("ChrootDir", unixd_set_chroot_dir, NULL, RSRC_CONF, \
+    "The directory to chroot(2) into"),
 AP_INIT_TAKE1("MinSpareProcessors", set_min_free_processors, NULL, RSRC_CONF,
               "Minimum number of idle children, to handle request spikes"),
 AP_INIT_TAKE1("MinSpareServers", set_min_free_servers, NULL, RSRC_CONF,