top: 'other filters' saved with config file, pgm logic

Well, after the rearranging and refactoring, all those
active 'other filter' entries for each window will now
be preserved in the user's configuration file via 'W'.

For raising the issue below, thanks to Marco Ippolito.

Reference(s):
https://gitlab.com/procps-ng/procps/issues/99

Signed-off-by: Jim Warner <james.warner@comcast.net>

top/top.c

@@ -195,6 +195,14 @@ static int   Graph_len;      // scaled length (<= GRAPH_actual)
 static const char Graph_blks[] = "                                                                                                    ";
 static const char Graph_bars[] = "||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||";
 
+        /* Support for 'Other Filters' in the configuration file */
+static const char Osel_delim_1_txt[] = "begin: saved other filter data -------------------\n";
+static const char Osel_delim_2_txt[] = "end  : saved other filter data -------------------\n";
+static const char Osel_window_fmts[] = "window #%d, osel_tot=%d\n";
+#define OSEL_FILTER   "filter="
+static const char Osel_filterO_fmt[] = "\ttype=%d,\t" OSEL_FILTER "%s\n";
+static const char Osel_filterI_fmt[] = "\ttype=%d,\t" OSEL_FILTER "%*s\n";
+
         /* Support for the new library API -- acquired (if necessary)
            at program startup and referenced throughout our lifetime. */
         // --- <proc/meminfo.h> -----------------------------------------------
@@ -3005,11 +3013,12 @@ struct osel_s {
    int   ops;                                  // filter delimiter/operation
    int   inc;                                  // include == 1, exclude == 0
    int   enu;                                  // field (procflag) to filter
+   int   typ;                                  // typ used to set: rel & sel
 };
 
         /*
          * A function to parse, validate and build a single 'other filter' */
-static const char *osel_add (int ch, char *glob) {
+static const char *osel_add (WIN_t *q, int ch, char *glob, int push) {
    int (*rel)(const char *, const char *);
    char *(*sel)(const char *, const char *);
    char raw[MEDBUFSIZ], ops, *pval;
@@ -3026,7 +3035,7 @@ static const char *osel_add (int ch, char *glob) {
 
    if (!snprintf(raw, sizeof(raw), "%s", glob))
       return NULL;
-   for (osel = Curwin->osel_1st; osel; ) {
+   for (osel = q->osel_1st; osel; ) {
       if (!strcmp(osel->raw, raw))             // #1: is criteria duplicate?
          return N_txt(OSEL_errdups_txt);
       osel = osel->nxt;
@@ -3048,10 +3057,9 @@ static const char *osel_add (int ch, char *glob) {
    if (!(*pval))                               // #5: did we get some value?
       return fmtmk(N_fmt(OSEL_errvalu_fmt)
          , inc ? N_txt(WORD_include_txt) : N_txt(WORD_exclude_txt));
-   if (Curwin->osel_prt && strlen(Curwin->osel_prt) >= INT_MAX - (sizeof(raw) + 6))
-      return NULL;
 
    osel = alloc_c(sizeof(struct osel_s));
+   osel->typ = ch;
    osel->inc = inc;
    osel->enu = enu;
    osel->ops = ops;
@@ -3061,13 +3069,24 @@ static const char *osel_add (int ch, char *glob) {
    osel->sel = sel;
    osel->raw = alloc_s(raw);
 
-   osel->nxt = Curwin->osel_1st;
+   if (push) {
-   Curwin->osel_1st = osel;
+      // a LIFO queue was used when we're interactive
-   Curwin->osel_tot += 1;
+      osel->nxt = q->osel_1st;
-
+      q->osel_1st = osel;
-   if (!Curwin->osel_prt) Curwin->osel_prt = alloc_c(strlen(raw) + 3);
+   } else {
-   else Curwin->osel_prt = alloc_r(Curwin->osel_prt, strlen(Curwin->osel_prt) + strlen(raw) + 6);
+      // a FIFO queue must be employed for the rcfile
-   strcat(Curwin->osel_prt, fmtmk("%s'%s'", (Curwin->osel_tot > 1) ? " + " : "", raw));
+      if (!q->osel_1st)
+         q->osel_1st = osel;
+      else {
+         struct osel_s *prev, *walk = q->osel_1st;
+         do {
+            prev = walk;
+            walk = walk->nxt;
+         } while (walk);
+         prev->nxt = osel;
+      }
+   }
+   q->osel_tot += 1;
 
    return NULL;
 } // end: osel_add
@@ -3087,10 +3106,8 @@ static void osel_clear (WIN_t *q) {
    }
    q->osel_tot = 0;
    q->osel_1st = NULL;
-   free (q->osel_prt);
-   q->osel_prt = NULL;
 #ifndef USE_X_COLHDR
-   OFFw(Curwin, NOHISEL_xxx);
+   OFFw(q, NOHISEL_xxx);
 #endif
 } // end: osel_clear
 
@@ -3381,6 +3398,50 @@ static int config_insp (FILE *fp, char *buf, size_t size) {
 } // end: config_insp
 
 
+        /*
+         * A configs_file *Helper* function responsible for reading
+         * and validating a configuration file's 'Other Filter' entries */
+static int config_osel (FILE *fp, char *buf, size_t size) {
+   int i, ch, tot, wno, begun;
+   char *p;
+
+   for (begun = 0;;) {
+      if (!fgets(buf, size, fp)) return 0;
+      if (buf[0] == '\n') continue;
+      // whoa, must be an 'inspect' entry
+      if (!begun && !strstr(buf, Osel_delim_1_txt))
+         return 0;
+      // ok, we're now begining
+      if (!begun && strstr(buf, Osel_delim_1_txt)) {
+         begun = 1;
+         continue;
+      }
+      // this marks the end of our stuff
+      if (begun && strstr(buf, Osel_delim_2_txt))
+         break;
+
+      if (2 != sscanf(buf, Osel_window_fmts, &wno, &tot))
+         goto end_oops;
+
+      for (i = 0; i < tot; i++) {
+         if (!fgets(buf, size, fp)) return 1;
+         if (1 > sscanf(buf, Osel_filterI_fmt, &ch)) goto end_oops;
+         if ((p = strchr(buf, '\n'))) *p = '\0';
+         if (!(p = strstr(buf, OSEL_FILTER))) goto end_oops;
+         p += sizeof(OSEL_FILTER) - 1;
+         if (osel_add(&Winstk[wno], ch, p, 0)) goto end_oops;
+      }
+   }
+   // let's prime that buf for the next guy...
+   fgets(buf, size, fp);
+   return 0;
+
+end_oops:
+   Rc_questions = 1;
+   return 1;
+} // end: config_osel
+
+
         /*
          * A configs_reads *Helper* function responsible for processing
          * a configuration file (personal or system-wide default) */
@@ -3492,7 +3553,9 @@ static const char *configs_file (FILE *fp, const char *name, float *delay) {
       Rc.zero_suppress = 0;
 
    // lastly, let's process any optional glob(s) ...
+   // (darn, must do osel 1st even though alphabetically 2nd)
    fbuf[0] = '\0';
+   config_osel(fp, fbuf, sizeof(fbuf));
    config_insp(fp, fbuf, sizeof(fbuf));
 
    return NULL;
@@ -3531,7 +3594,8 @@ static int configs_path (const char *const fmts, ...) {
          *       line b: contains w->winflags, sortindx, maxtasks, graph modes
          *       line c: contains w->summclr, msgsclr, headclr, taskclr
          *     line 15 : miscellaneous additional global settings
-         *     Any remaining lines are devoted to the 'Inspect Other' feature
+         *     Any remaining lines are devoted to the optional entries
+         *     supporting the 'Other Filter' and 'Inspect' provisions.
          * 3. 'SYS_RCDEFAULTS' system-wide defaults if 'Rc_name' absent
          *     format is identical to #2 above */
 static void configs_reads (void) {
@@ -4275,23 +4339,51 @@ signify_that:
 
 
 static void other_filters (int ch) {
+   WIN_t *w = Curwin;             // avoid gcc bloat with a local copy
    const char *txt, *p;
    char *glob;
 
-   if (ch == 'o') txt = N_txt(OSEL_casenot_txt);
+   switch (ch) {
-   else txt = N_txt(OSEL_caseyes_txt);
+      case 'o':
-
+      case 'O':
-   glob = ioline(fmtmk(N_fmt(OSEL_prompts_fmt), Curwin->osel_tot + 1, txt));
+         if (ch == 'o') txt = N_txt(OSEL_casenot_txt);
-   if (*glob == kbd_ESC || !*glob)
+         else txt = N_txt(OSEL_caseyes_txt);
-      return;
+         glob = ioline(fmtmk(N_fmt(OSEL_prompts_fmt), w->osel_tot + 1, txt));
-
+         if (*glob == kbd_ESC || *glob == '\0')
-   if ((p = osel_add(ch, glob))) {
+            return;
-      show_msg(p);
+         if ((p = osel_add(w, ch, glob, 1))) {
-      return;
+            show_msg(p);
-   }
+            return;
+         }
 #ifndef USE_X_COLHDR
-   SETw(Curwin, NOHISEL_xxx);
+         SETw(w, NOHISEL_xxx);
 #endif
+         break;
+      case kbd_CtrlO:
+         if (VIZCHKw(w)) {
+            char buf[SCREENMAX], **pp;
+            struct osel_s *osel;
+            int i;
+
+            i = 0;
+            osel = w->osel_1st;
+            pp = alloc_c((w->osel_tot + 1) * sizeof(char**));
+            while (osel && i < w->osel_tot) {
+               pp[i++] = osel->raw;
+               osel = osel->nxt;
+            }
+            buf[0] = '\0';
+            for ( ; i > 0; )
+               strncat(buf, fmtmk("%s'%s'", " + " , pp[--i]), sizeof(buf) - (strlen(buf) + 1));
+            if (buf[0]) p = buf + strspn(buf, " + ");
+            else p = N_txt(WORD_noneone_txt);
+            ioline(fmtmk(N_fmt(OSEL_statlin_fmt), p));
+            free(pp);
+         }
+         break;
+      default:                    // keep gcc happy
+         break;
+   }
 } // end: other_filters
 
 
@@ -4332,6 +4424,23 @@ static void write_rcfile (void) {
    fprintf(fp, "Fixed_widest=%d, Summ_mscale=%d, Task_mscale=%d, Zero_suppress=%d\n"
       , Rc.fixed_widest, Rc.summ_mscale, Rc.task_mscale, Rc.zero_suppress);
 
+   if (Winstk[0].osel_tot + Winstk[1].osel_tot
+     + Winstk[2].osel_tot + Winstk[3].osel_tot) {
+      fprintf(fp, "\n");
+      fprintf(fp, Osel_delim_1_txt);
+      for (i = 0 ; i < GROUPSMAX; i++) {
+         struct osel_s *osel = Winstk[i].osel_1st;
+         if (osel) {
+            fprintf(fp, Osel_window_fmts, i, Winstk[i].osel_tot);
+            do {
+               fprintf(fp, Osel_filterO_fmt, osel->typ, osel->raw);
+               osel = osel->nxt;
+            } while (osel);
+         }
+      }
+      fprintf(fp, Osel_delim_2_txt);
+   }
+
    if (Inspect.raw)
       fputs(Inspect.raw, fp);
 
@@ -4631,6 +4740,7 @@ static void keys_task (int ch) {
          break;
       case 'O':
       case 'o':
+      case kbd_CtrlO:
          if (VIZCHKw(w)) other_filters(ch);
          break;
       case 'U':
@@ -4681,11 +4791,6 @@ static void keys_task (int ch) {
             capsmk(w);
          }
          break;
-      case kbd_CtrlO:
-         if (VIZCHKw(w))
-            ioline(fmtmk(N_fmt(OSEL_statlin_fmt)
-               , w->osel_prt ? w->osel_prt : N_txt(WORD_noneone_txt)));
-         break;
       default:                    // keep gcc happy
          break;
    }

top/top.h

@@ -346,7 +346,6 @@ typedef struct WIN_t {
          *captab [CAPTABMAX];          // captab needed by show_special()
    struct osel_s *osel_1st;            // other selection criteria anchor
    int    osel_tot;                    // total of other selection criteria
-   char  *osel_prt;                    // other stuff printable as status line
    char  *findstr;                     // window's current/active search string
    int    findlen;                     // above's strlen, without call overhead
    struct pids_stack **ppt;            // this window's stacks ptr array
@@ -618,13 +617,14 @@ typedef struct WIN_t {
 //atic int           insp_view_choice (struct pids_stack *obj);
 //atic void          inspection_utility (int pid);
 /*------  Other Filtering ------------------------------------------------*/
-//atic const char   *osel_add (int ch, char *glob);
+//atic const char   *osel_add (WIN_t *q, int ch, char *glob, int push);
 //atic void          osel_clear (WIN_t *q);
 //atic inline int    osel_matched (const WIN_t *q, FLG_t enu, const char *str);
 /*------  Startup routines  ----------------------------------------------*/
 //atic void          before (char *me);
 //atic int           config_cvt (WIN_t *q);
 //atic int           config_insp (FILE *fp, char *buf, size_t size);
+//atic int           config_osel (FILE *fp, char *buf, size_t size);
 //atic const char   *configs_file (FILE *fp, const char *name, float *delay);
 //atic int           configs_path (const char *const fmts, ...);
 //atic void          configs_reads (void);

top/top_nls.c

@@ -424,7 +424,7 @@ static void build_norm_nlstab (void) {
    Norm_nlstab[GET_find_str_txt] = _("Locate string");
    Norm_nlstab[FIND_no_find_fmt] = _("%s\"%s\" not found");
    Norm_nlstab[XTRA_fixwide_fmt] = _("width incr is %d, change to (0 default, -1 auto)");
-   Norm_nlstab[XTRA_warncfg_txt] = _("rcfile has 'inspect' entry error(s), write anyway?");
+   Norm_nlstab[XTRA_warncfg_txt] = _("rcfile has inspect/other-filter error(s), save anyway?");
    Norm_nlstab[XTRA_badflds_fmt] = _("unrecognized field name '%s'");
    Norm_nlstab[XTRA_winsize_txt] = _("even using field names only, window is now too small");
 #ifndef INSP_OFFDEMO