diff --git a/test/xorriso.c b/test/xorriso.c
index 144f890e..de5f4583 100644
--- a/test/xorriso.c
+++ b/test/xorriso.c
@@ -1521,7 +1521,7 @@ time_t Decode_timestring(char *code, time_t *date, int flag)
      seconds= 0;
      sscanf(code+1,"%lf",&value);
    } else {
-     seconds= time(0);
+     seconds= time(NULL);
      sscanf(code,"%lf",&value);
    }
    scale_chr= code[strlen(code)-1];
@@ -3979,7 +3979,7 @@ int Xorriso_option_chmodi(struct XorrisO *xorriso, char *mode,
 {
  int i, end_idx, ret, who_val= 0, was_failure= 0;
  unsigned int num;
- mode_t mode_and= ~0, mode_or= 0, mode_val;
+ mode_t mode_and= ~0, mode_or= 0, mode_val, mask;
  char sfe[4*SfileadrL], *mpt, *opt, *vpt;
 
  end_idx= Xorriso_end_idx(xorriso, argc, argv, *idx, 0);
@@ -3988,7 +3988,8 @@ int Xorriso_option_chmodi(struct XorrisO *xorriso, char *mode,
    mode_and= 0;
    sscanf(mode,"%o",&num);
    mode_or= num;
- } else if(strchr(mode,'+')!=NULL || strchr(mode,'-')!=NULL) {
+ } else if(strchr(mode,'+')!=NULL || strchr(mode,'-')!=NULL
+           || strchr(mode,'=')!=NULL) {
    /* [ugoa][+-][rwxst] */;
    for(mpt= mode; mpt!=NULL; mpt= strchr(mpt, ',')) {
      if(*mpt==',')
@@ -4038,15 +4039,23 @@ int Xorriso_option_chmodi(struct XorrisO *xorriso, char *mode,
          if(who_val&2)
            mode_val|= S_ISGID;
        } else if(*vpt=='t') {
-         mode_val|= S_ISVTX;
+         if(who_val&1)
+           mode_val|= S_ISVTX;
        } else
          goto unrecognizable;
      }
      if(*opt=='+') {
        mode_or|= mode_val;
      } else if(*opt=='=') {
-       mode_and= 0;
-       mode_or= mode_val;
+       mask= 0;
+       if(who_val&1)
+         mask|= S_IRWXO|S_ISVTX;
+       if(who_val&2)
+         mask|= S_IRWXG|S_ISGID;
+       if(who_val&4)
+         mask|= S_IRWXU|S_ISUID;
+       mode_and&= ~(mask);
+       mode_or= (mode_or & ~mask) | mode_val;
      } else if(*opt=='-') {
        mode_or&= ~mode_val;
        mode_and&= ~mode_val;
diff --git a/test/xorriso_timestamp.h b/test/xorriso_timestamp.h
index 8ac3be77..12f72b2b 100644
--- a/test/xorriso_timestamp.h
+++ b/test/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2007.11.08.145016"
+#define Xorriso_timestamP "2007.11.08.160302"