diff --git a/Makefile b/Makefile
index 858e3fce..93e49350 100644
--- a/Makefile
+++ b/Makefile
@@ -155,8 +155,10 @@ install: $(filter-out $(SKIP) $(addprefix $(DESTDIR),$(SKIP)),$(INSTALL))
 
 ############ prog.c --> prog.o
 
+top.o : top.h
+
 %.o : %.c
-	$(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) -c -o $@ $^
+	$(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) -c -o $@ $<
 
 w.o:    w.c
 	$(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) $(W_SHOWFROM) -c $<
diff --git a/NEWS b/NEWS
index e9ccf804..284fcfb3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,9 +1,11 @@
 procps-3.1.11 --> procps-3.1.12
 
+ps: explicit width ("ps -o pid,wchan:42,args")
+ps: $PS_FORMAT works properly                    #201575
 top: new Linux 2.6.0-test4 CPU stats shown
 top: multiple -p options work again
 top: fixed 4 GB wrap-around
-ps: comes with tests
+ps: has a set of tests to ensure correctness
 man page: /var/run/utmp, not /etc/utmp           #206583
 required flags moved out of CFLAGS               #205429
 RPM generation handles /lib64
diff --git a/ps/ps.1 b/ps/ps.1
index b22288a6..c99cd2d4 100644
--- a/ps/ps.1
+++ b/ps/ps.1
@@ -152,9 +152,13 @@ If all column headers are empty ("ps -o pid= -o comm=") then the
 header line will not be output. Column width will increase as
 needed for wide headers; this may be used to widen up columns
 such as WCHAN ("ps -o pid,wchan=WIDE-WCHAN-COLUMN -o comm").
+Explicit width control ("ps opid,wchan:42,cmd") is offered too.
 The behavior of "ps -o pid=X,comm=Y" varies with personality;
 output may be one column named "X,comm=Y" or two columns
 named "X" and "Y". Use multiple -o options when in doubt.
+Use the $PS_FORMAT environment variable to specify a default
+as desired; DefSysV and DefBSD are macros that may be used to
+choose the default UNIX or BSD columns.
 
 The "-g" option can select by session leader OR by group name.
 Selection by session leader is specified by many standards,
@@ -186,7 +190,7 @@ Heuristics are used to determine the behavior of this option. To ensure
 that the desired behavior is obtained, specify the other option (sorting
 or formatting) in some other way.
 
-For sorting, BSD "O" option syntax is O[+|-]k1[,[+|-]k2[,...]]
+For sorting, obsolete BSD "O" option syntax is O[+|-]k1[,[+|-]k2[,...]]
 Order the process listing according to the multilevel sort specified by
 the sequence of short keys from SORT KEYS, k1, k2, ... The `+' is quite
 optional, merely re-iterating the default direction on a key. `-' reverses
diff --git a/ps/sortformat.c b/ps/sortformat.c
index 06181c5f..8750590a 100644
--- a/ps/sortformat.c
+++ b/ps/sortformat.c
@@ -268,6 +268,7 @@ out:
   while(items--){
     format_node *endp;
     char *equal_loc;
+    char *colon_loc;
     sep_loc = strpbrk(walk," ,\t\n");
     /* if items left, then sep_loc is not in header override */
     if(items && sep_loc) *sep_loc = '\0';
@@ -276,6 +277,15 @@ out:
       *equal_loc = '\0';
       equal_loc++;
     }
+    colon_loc = strpbrk(walk,":");
+    if(colon_loc){   /* if width override */
+      *colon_loc = '\0';
+      colon_loc++;
+      if(strspn(colon_loc,"0123456789") != strlen(colon_loc) || *colon_loc=='0'){
+        free(buf);
+        goto badwidth;
+      }
+    }
     fnode =  do_one_spec(walk,equal_loc);
     if(!fnode){
       if(!*errbuf){  /* if didn't already create an error string */
@@ -289,6 +299,14 @@ out:
       free(buf);
       goto unknown;
     }
+    if(colon_loc){
+      if(fnode->next){
+        free(buf);
+        goto notmacro;
+      }
+      // FIXME: enforce signal width to 8, 9, or 16 (grep: SIGNAL wide_signals)
+      fnode->width = atoi(colon_loc); // already verified to be a number
+    }
     endp = fnode; while(endp->next) endp = endp->next;  /* find end */
     endp->next = sfn->f_cooked;
     sfn->f_cooked = fnode;
@@ -302,6 +320,8 @@ out:
   if(0) unknown:  err=errbuf;
   if(0) empty:    err="Empty format list.";
   if(0) improper: err="Improper format list.";
+  if(0) badwidth: err="Column widths must be unsigned decimal numbers.";
+  if(0) notmacro: err="Can't set width for a macro (multi-column) format specifier.";
   if(strchr(sfn->sf,'%')) err = aix_format_parse(sfn);
   return err;
 }
@@ -733,13 +753,14 @@ static const char *generate_sysv_list(void){
  * The "broken" flag enables a really bad Unix98 misfeature.
  */
 const char *process_sf_options(int localbroken){
-  const char *err;
   sf_node *sf_walk;
   int option_source;  /* true if user-defined */
+
   if(personality & PER_BROKEN_o) localbroken = 1;
   if(personality & PER_GOOD_o)   localbroken = 0;
   broken = localbroken;
   if(sf_list){
+    const char *err;
     err = parse_O_option(sf_list);
     if(err) return err;
   }
@@ -782,8 +803,6 @@ const char *process_sf_options(int localbroken){
     if(format_flags) return "Conflicting format options.";
     option_source = 1;
   }else{
-    format_node *fmt_walk;
-    format_node *fn;
     const char *spec;
     switch(format_flags){
 
@@ -822,14 +841,32 @@ const char *process_sf_options(int localbroken){
       char *tmp;
       tmp = getenv("PS_FORMAT");  /* user override kills default */
       if(tmp && *tmp){
-        spec = tmp;
-        option_source = 2;
+        const char *err;
+        sf_node sfn;
+//        spec = tmp;
+//        option_source = 2;
+        sfn.sf = tmp;
+        sfn.f_cooked = NULL;
+        err = format_parse(&sfn);
+        if(!err){
+          format_node *fmt_walk;
+          fmt_walk = sfn.f_cooked;
+          while(fmt_walk){   /* put any nodes onto format_list in opposite way */
+            format_node *travler;
+            travler = fmt_walk;
+            fmt_walk = fmt_walk->next;
+            travler->next = format_list;
+            format_list = travler;
+          }
+          return NULL;
+        }
+        fprintf(stderr, "Warning: $PS_FORMAT ignored. (%s)\n", err);
       }
     }
 
     if(spec){
-      fn = do_one_spec(spec, NULL); /* use override "" for no headers */
-      fmt_walk = fn;
+      format_node *fmt_walk;
+      fmt_walk = do_one_spec(spec, NULL); /* use override "" for no headers */
       while(fmt_walk){   /* put any nodes onto format_list in opposite way */
         format_node *travler;
         travler = fmt_walk;
@@ -838,6 +875,7 @@ const char *process_sf_options(int localbroken){
         format_list = travler;
       }
     }else{
+      const char *err;
       err = generate_sysv_list();
       if(err) return err;
       option_source = 3;
diff --git a/top.c b/top.c
index 5428d204..5a6d1efb 100644
--- a/top.c
+++ b/top.c
@@ -1434,8 +1434,8 @@ static void rc_write_new (FILE *fp) {
    fprintf(fp, RCF_EYECATCHER "\"%s with windows\"\t\t# shameless braggin'\n"
       , Myname);
    fprintf(fp, RCF_DEPRECATED
-      "Mode_altscr=%d, Mode_irixps=%d, Delay_time=%.3f, Curwin=%d\n"
-      , Rc.mode_altscr, Rc.mode_irixps, Rc.delay_time, Curwin - Winstk);
+      "Mode_altscr=%d, Mode_irixps=%d, Delay_time=%.3f, Curwin=%u\n"
+      , Rc.mode_altscr, Rc.mode_irixps, Rc.delay_time, (unsigned)(Curwin - Winstk));
    for (i = 0; i < GROUPSMAX; i++) {
       char buf[40];
       char *cp = Winstk[i].rc.fieldscur;
diff --git a/top.h b/top.h
index ee1c320e..95014d36 100644
--- a/top.h
+++ b/top.h
@@ -368,7 +368,7 @@ typedef struct WIN_t {
 #define STATES_line2x5  "%s\03" \
    " %#5.1f%% \02user,\03 %#5.1f%% \02system,\03 %#5.1f%% \02nice,\03 %#5.1f%% \02idle,\03 %#5.1f%% \02IO-wait\03\n"
 #define STATES_line2x6  "%s\03" \
-   " %#4.1f%% \02us,\03 %#4.1f%% \02sy,\03 %#4.1f%% \02ni,\03 %#4.1f%% \02id,\03 %#4.1f%% \02wa,\03 %#4.1f%% \02hi,\03 %#4.1f%% \02si,\03\n"
+   " %#4.1f%% \02us,\03 %#4.1f%% \02sy,\03 %#4.1f%% \02ni,\03 %#4.1f%% \02id,\03 %#4.1f%% \02wa,\03 %#4.1f%% \02hi,\03 %#4.1f%% \02si\03\n"
 #ifdef CASEUP_SUMMK
 #define MEMORY_line1  "Mem: \03" \
    " %8uK \02total,\03 %8uK \02used,\03 %8uK \02free,\03 %8uK \02buffers\03\n"