added output width/height override support to top, + misc

This source patch addresses the following:
 Enhancements
  . added -w command line switch, with optional argument
   ( offers complete control over width and height, in  )
   ( combination with env variables COLUMNS= and LINES= )
  . updated man document to reflect the new capability
  . reengineered Fields Management to be more flexible
    thus no longer requiring a normal sized tty
 Buglets fixed
  . forced View_SCROLL off when in 'Batch' mode
  . for narrow xterm, fixed return val in show_pmt
  . for narrow xterm, fixed cursor pos in linein
  . added a window specific end-of-line termcap ptr
   ( so clr_eol does not overwrite last printable char )
 Cosmetic changes
  . eliminated TTYGETENVYES define, incorporated as -w
  . eliminated RESIZE_LIMIT define, no longer needed
  . eliminated FIELD_CURSOR define, no longer possible
  . eliminated extra text on Fields Management screen
  . fixed miscellaneous man document typos/formatting

Signed-off-by: Jan Görig <jgorig@redhat.com>

top.1

@@ -99,8 +99,8 @@
 .\" ----------------------------------------------------------------------
 .SH SYNOPSIS
 .\" ----------------------------------------------------------------------
-\*(WE \-\fBhv\fR | \-\fBbcHisS\fR \-\fBd\fI delay\fR \-\fBn\fI limit\fR
+\*(WE \-\fBhv\fR|\-\fBbcHisS\fR \-\fBd\fI delay\fR \-\fBn\fI limit\fR
-\-\fBu\fR|\fBU\fI user\fR | \-\fBp\fI pid\fR [,\fIpid\fR ...]
+\-\fBu\fR|\fBU\fI user\fR \-\fBp\fI pid\fR \-\fBw\fR [\fIcols\fR] \fR
 
 The traditional switches '-' and whitespace are optional.
 
@@ -191,15 +191,14 @@ These areas will be explored in the sections that follow.
 There is also an Input/Message line between the Summary Area and Columns
 Header which needs no further explanation.
 
-.PP
 \*(NT the width of \*(We's display will be limited to \*(WX positions.
 Displaying all fields requires \*(WF characters.
-The remaining width is allocated to variable width columns currently being
+Remaining screen width is usually allocated to any variable width columns
-displayed which can expand to show additional information.
+currently visible.
-
+The variable width columns, such as COMMAND, are noted in topic
-An example would be the COMMAND field which could show the program name
+3a. DESCRIPTIONS of Fields.
-only or a complete command line reflecting path and arguments.
+Actual output width may also be influenced by the -w switch, which is
-Other variable width columns are noted in topic 3a. DESCRIPTIONS of Fields.
+discussed in topic 1. COMMAND\-LINE Options.
 
 .\" ......................................................................
 .SS Startup Defaults
@@ -243,7 +242,7 @@ All are explained in detail in the sections that follow.
 The command-line syntax for \*(We consists of:
 
   \-\fBhv\fR | \-\fBbcHisS\fR \-\fBd\fI delay\fR \-\fBn\fI limit\fR
-\-\fBu\fR|\fBU\fI user\fR | \-\fBp\fI pid\fR [,\fIpid\fR ...]
+\-\fBu\fR|\fBU\fI user\fR | \-\fBp\fI pid\fR \-\fBw\fR [\fIcols\fR] \fR
 
 The typically mandatory switches ('-') and even whitespace are completely
 optional.
@@ -254,7 +253,7 @@ Show library version and the usage prompt, then quit.
 
 .TP 5
 \-\fBb\fR :\fI Batch-mode\fR operation \fR
-Starts \*(We in 'Batch mode', which could be useful for sending output
+Starts \*(We in 'Batch' mode, which could be useful for sending output
 from \*(We to other programs or to a file.
 In this mode, \*(We will not accept input and runs until the iterations
 limit you've set with the '-n' \*(CO or until killed.
@@ -323,13 +322,29 @@ time that it and its dead children have used.
 \*(XC 'S' \*(CI for additional information regarding this mode.
 
 .TP 5
-\-\fBu\fR | \-\fBU\fR :\fI User-filter-mode\fR as:\ \ -u | -U\fB number\fR or\fB name \fR
+\-\fBu\fR | \-\fBU\fR :\fI User-filter-mode\fR as:\ \ \fB-u\fR | \fB-U number\fR or\fB name \fR
 Display only processes with a user id or user name matching that given.
-The '-u' option matches on \fB effective\fR user whereas the '-U' option
+The '-u' option matches on \fI effective\fR user whereas the '-U' option
-matches on\fB any\fR user (real, effective, saved, or filesystem).
+matches on\fI any\fR user (real, effective, saved, or filesystem).
 
 The 'p', 'u' and 'U' \*(COs are mutually exclusive.
 
+.TP 5
+\-\fBw\fR :\fI Output-width-override\fR as:\ \ \fB-w\fR [\fB number\fR ] \fR
+In 'Batch' mode, when used without an argument \*(We will format
+output using the COLUMNS= and LINES= environment variables, if set.
+Otherwise, width will be fixed at the maximum \*(WX columns.
+With an argument, output width can be decreased or increased (up to \*(WX)
+but the number of rows is considered unlimited.
+
+In normal display mode, when used without an argument \*(We will\fI attempt\fR
+to format output using the COLUMNS= and LINES= environment variables, if set.
+With an argument, output width can only be decreased, not increased.
+Whether using environment variables or an argument with -w, when\fI not\fR
+in 'Batch' mode actual terminal dimensions can never be exceeded.
+
+\*(NT Without the use of this \*(CO, output width is always based on the
+terminal at which \*(We was invoked whether or not in 'Batch' mode.
 
 .\" ----------------------------------------------------------------------
 .SH 2. SUMMARY Display
@@ -480,7 +495,7 @@ The\fI effective\fR group name.
 A task's currently used share of available \*(MP.
 
 .TP 4
- 10.\fB NI \*(Em Nice Value \fR
+10.\fB NI \*(Em Nice Value \fR
 The nice value of the task.
 A negative nice value means higher priority, whereas a positive nice value
 means lower priority.
@@ -1133,7 +1148,7 @@ The following \*(CIs are available.
         'q'       :abandon current changes and exit
 .Ed
 
-If your use 'a' or 'w' to cycle the targeted window, you will
+If you use 'a' or 'w' to cycle the targeted window, you will
 have applied the color scheme that was displayed when you left that window.
 You can, of course, easily return to any window and reapply different
 colors or turn colors \*F completely with the 'z' toggle.

top.c

@@ -104,7 +104,8 @@ static int No_ksyms = -1,       // set to '0' if ksym avail, '1' otherwise
            Batch = 0,           // batch mode, collect no input, dumb output
            Loops = -1,          // number of iterations, -1 loops forever
            Secure_mode = 0,     // set if some functionality restricted
-           Thread_mode = 0;     // set w/ 'H' - show threads via readtask()
+           Thread_mode = 0,     // set w/ 'H' - show threads via readtask()
+           Width_mode = 0;      // set w/ 'w' - potential output override
 
         /* Unchangeable cap's stuff built just once (if at all) and
            thus NOT saved in a WIN_t's RCW_t.  To accomodate 'Batch'
@@ -316,7 +317,6 @@ static void bye_bye (const char *str) {
 #ifndef RMAN_IGNORED
       putp(Cap_smam);
 #endif
-      putp("\n");
    }
    fflush(stdout);
 
@@ -468,6 +468,7 @@ static void bye_bye (const char *str) {
       fputs(str, stderr);
       exit(1);
    }
+   putp("\n");
    exit(0);
 } // end: bye_bye
 
@@ -646,17 +647,19 @@ static void show_msg (const char *str) {
         /*
          * Show an input prompt + larger cursor (if possible) */
 static int show_pmt (const char *str) {
+   int rc;
+
    PUTT("%s%s%.*s: %s%s%s"
       , tg2(0, Msg_row)
       , Curwin->capclr_pmt
-      , Screen_cols - 2
+      , Screen_cols - 3
       , str
       , Cap_curs_huge
       , Caps_off
       , Cap_clr_eol);
    fflush(stdout);
-   // +2 for the ': ' characters we added (if anybody cares)...
+   // +2 for the ': ' chars we added or -1 for the cursor...
-   return (int)strlen(str) + 2;
+   return ((rc = (int)strlen(str)+2) < Screen_cols) ? rc : Screen_cols-1;
 } // end: show_pmt
 
 
@@ -754,8 +757,8 @@ static void show_special (int interact, const char *glob) {
    /* If there's anything left in the glob (by virtue of no trailing '\n'),
       it probably means caller wants to retain cursor position on this final
       line.  That, in turn, means we're interactive and so we'll just do our
-      'fit-to-screen' thingy... */
+      'fit-to-screen' thingy while also leaving room for the cursor... */
-   if (*glob) PUTT("%.*s", Screen_cols, glob);
+   if (*glob) PUTT("%.*s", Screen_cols -1, glob);
 } // end: show_special
 
 /*######  Low Level Memory/Keyboard support  #############################*/
@@ -920,7 +923,7 @@ static char *linein (const char *prompt) {
     // thank goodness memmove allows the two strings to overlap
  #define sqzSTR  { memmove(&buf[pos], &buf[pos+1], bufMAX-pos); \
        buf[sizeof(buf)-1] = '\0'; }
- #define expSTR  if (len+1 < bufMAX-1 && len+beg+1 < Screen_cols-1) { \
+ #define expSTR  if (len+1 < bufMAX && len+beg+1 < Screen_cols) { \
        memmove(&buf[pos+1], &buf[pos], bufMAX-pos); buf[pos] = ' '; }
  #define logCOL  (pos+1)
  #define phyCOL  (beg+pos+1)
@@ -963,7 +966,7 @@ static char *linein (const char *prompt) {
             pos = len;
             break;
          default:                      // what we REALLY wanted (maybe)
-            if (isprint(key) && logCOL+1 < bufMAX && phyCOL+1 < Screen_cols)
+            if (isprint(key) && logCOL < bufMAX && phyCOL < Screen_cols)
                buf[pos++] = key;
             break;
       }
@@ -1245,6 +1248,7 @@ static FLD_t Fieldstab[] = {
          * cached screen geometry and related variables */
 static void adj_geometry (void) {
    static size_t pseudo_max = 0;
+   static int w_set = 0, w_cols = 0, w_rows = 0;
    struct winsize wz;
 
    Screen_cols = columns;    // <term.h>
@@ -1256,27 +1260,6 @@ static void adj_geometry (void) {
       Screen_rows = wz.ws_row;
    }
 
-#ifdef TTYGETENVYES
-{  char *env_columns = getenv("COLUMNS");   // Unix98 environment vars
-   char *env_lines   = getenv("LINES");
-
-   if (env_columns && *env_columns && env_lines && *env_lines) {
-      long t, tc = 0, tr = 0;
-      char *endptr;
-
-      t = strtol(env_columns, &endptr, 0);
-      if (!*endptr && (t > 0) && (t <= 0x7fffffffL)) tc = t;
-      t = strtol(env_lines, &endptr, 0);
-      if (!*endptr && (t > 0) && (t <= 0x7fffffffL)) tr = t;
-      // only allow environment vars override if both make sense...
-      if (0 < tc && 0 < tr) {
-         Screen_cols = (int)tc;
-         Screen_rows = (int)tr;
-      }
-   }
-}
-#endif
-
 #ifndef RMAN_IGNORED
    // be crudely tolerant of crude tty emulators
    if (Cap_avoid_eol) Screen_cols--;
@@ -1284,9 +1267,33 @@ static void adj_geometry (void) {
 
    // we might disappoint some folks (but they'll deserve it)
    if (SCREENMAX < Screen_cols) Screen_cols = SCREENMAX;
-#ifdef RESIZE_LIMIT
+
-   if (SCRCOLMIN > Screen_cols || SCRROWMIN > Screen_rows) error_exit("too tiny tty");
+   if (!w_set) {
-#endif
+      if (Width_mode > 0)              // -w with arg, we'll try to honor
+         w_cols = Width_mode;
+      else
+      if (Width_mode < 0) {            // -w without arg, try environment
+         char *env_columns = getenv("COLUMNS"),
+              *env_lines = getenv("LINES"),
+              *ep;
+         if (env_columns && *env_columns) {
+            long t, tc = 0;
+            t = strtol(env_columns, &ep, 0);
+            if (!*ep && (t > 0) && (t <= 0x7fffffffL)) tc = t;
+            if (0 < tc) w_cols = (int)tc;
+         }
+         if (env_lines && *env_lines) {
+            long t, tr = 0;
+            t = strtol(env_lines, &ep, 0);
+            if (!*ep && (t > 0) && (t <= 0x7fffffffL)) tr = t;
+            if (0 < tr) w_rows = (int)tr;
+         }
+         if (!w_cols) w_cols = SCREENMAX;
+         if (w_cols && w_cols < W_MIN_COL) w_cols = W_MIN_COL;
+         if (w_rows && w_rows < W_MIN_ROW) w_rows = W_MIN_ROW;
+      }
+      w_set = 1;
+   }
 
    /* keep our support for output optimization in sync with current reality
       note: when we're in Batch mode, we don't really need a Pseudo_screen
@@ -1294,17 +1301,21 @@ static void adj_geometry (void) {
             Msg_row is never represented -- but it's nice to have some space
             between us and the great-beyond... */
    if (Batch) {
-      Screen_rows = MAXINT;
+      if (w_cols) Screen_cols = w_cols;
+      Screen_rows = w_rows ? w_rows : MAXINT;
       Pseudo_size = (sizeof(*Pseudo_screen) * ROWMAXSIZ);
-   } else
+   } else {
+      if (w_cols && w_cols < Screen_cols) Screen_cols = w_cols;
+      if (w_rows && w_rows < Screen_rows) Screen_rows = w_rows;
       Pseudo_size = (sizeof(*Pseudo_screen) * ROWMAXSIZ) * Screen_rows;
-
+   }
    // we'll only grow our Pseudo_screen, never shrink it
    if (pseudo_max < Pseudo_size) {
       pseudo_max = Pseudo_size;
       Pseudo_screen = alloc_r(Pseudo_screen, pseudo_max);
    }
    PSU_CLREOS(0);
+   if (Frames_resize) putp(Cap_clr_scr);
 } // end: adj_geometry
 
 
@@ -1428,6 +1439,11 @@ static void calibrate_fields (void) {
 #ifdef EQUCOLHDRYES
          // prepare to even out column header lengths...
          if (hdrmax + w->hdrcaplen < (x = strlen(w->columnhdr))) hdrmax = x - w->hdrcaplen;
+         if (Screen_cols > x - w->hdrcaplen) w->eolcap = Caps_endline;
+         else w->eolcap = Caps_off;
+#else
+         if (Screen_cols > strlen(w->columnhdr)) w->eolcap = Caps_endline;
+         else w->eolcap = Caps_off;
 #endif
          // we must also accommodate an out of view sort field...
          f = w->rc.sortindx;
@@ -1480,59 +1496,81 @@ static void calibrate_fields (void) {
          * Special highlighting will be accorded the "focus" field with such
          * highlighting potentially extended to include the description.
          *
-         * After all fields have been displayed, some extra explanatory
+         * Below is the current Fieldstab space requirement and how
-         * text may also be output */
+         * we apportion it.  The xSUFX is considered sacrificial,
-static void display_fields (int focus, int extend, const char *xtra) {
+         * something we can reduce or do without.
+         *            0        1         2         3
+         *            12345678901234567890123456789012
+         *            * HEADING = Longest Description!
+         *      xPRFX ----------______________________ xSUFX
+         *    ( xPRFX has pos 2 & 10 for 'extending' when at minimums )
+         *
+         * The first 4 screen rows are reserved for explanatory text.
+         * Thus, with our current 36 fields, a maximum of 6 columns and
+         * 1 space between columns, a tty will still remain useable under
+         * these extremes:
+         *            rows  cols   displayed
+         *            ----  ----   ------------------
+         *             10    66    xPRFX only
+         *             10   198    full xPRFX + xSUFX
+         *             22    22    xPRFX only
+         *             22    66    full xPRFX + xSUFX
+         *    ( if not, the user deserves our most cryptic messages )
+         */
+static void display_fields (int focus, int extend) {
+ #define mxCOL  6
  #define yRSVD  4
+ #define xSUFX  22
+ #define xPRFX (10 + xadd)
+ #define xTOTL (xPRFX + xSUFX)
    WIN_t *w = Curwin;                  // avoid gcc bloat with a local copy
-   const char *p;
+   int i;                              // utility int (a row, tot cols, ix)
-#ifdef FIELD_CURSOR
+   int smax;                           // printable width of xSUFX
-   int savcol = 0, savrow = 0;    // make gcc happy (with initialization)
+   int xadd = 0;                       // spacing between data columns
-#endif
+   int cmax = Screen_cols;             // total data column width
-   int i,cmax, rmax;
+   int rmax = Screen_rows - yRSVD;     // total useable rows
 
    fflush(stdout);
-   cmax = Screen_cols / 2;
+   i = (P_MAXPFLGS % mxCOL) ? 1 : 0;
-   rmax = Screen_rows - yRSVD;
+   if (rmax < i + (P_MAXPFLGS / mxCOL)) error_exit("++rows");
+   i = P_MAXPFLGS / rmax;
+   if (P_MAXPFLGS % rmax) ++i;
+   if (i > 1) { cmax = Screen_cols / i; xadd = 1; }
+   if (cmax > xTOTL) cmax = xTOTL;
+   smax = cmax - xPRFX;
+   if (smax < 0) error_exit("++cols");
 
    for (i = 0; i < P_MAXPFLGS; ++i) {
-      FLG_t f = FLDget(w, i);
+      char sbuf[xSUFX+1];
       int b = FLDviz(w, i);
+      FLG_t f = FLDget(w, i);
+      const char *h, *e = (i == focus && extend) ? w->capclr_msg : "";
 
-      // advance past leading spaces, if any
+      // advance past leading header spaces and prep sacrificial suffix
-      for (p = Fieldstab[f].head; ' ' == *p; ++p) ;
+      for (h = Fieldstab[f].head; ' ' == *h; ++h) ;
-      PUTT("%s%c  %s%s%-10.10s%s%s%s = %-20.20s%s"
+      snprintf(sbuf, sizeof(sbuf), "= %s", Fieldstab[f].desc);
+
+      PUTT("%s%c%s%s %s%-7.7s%s%s%s %-*.*s%s"
          , tg2((i / rmax) * cmax, (i % rmax) + yRSVD)
          , b ? '*' : ' '
          , b ? w->cap_bold : Cap_norm
+         , e
          , i == focus ? w->capclr_msg : ""
-         , p
+         , h
          , Cap_norm
          , b ? w->cap_bold : ""
-         , (i == focus && extend) ? w->capclr_msg : ""
+         , e
-         , Fieldstab[f].desc
+         , smax, smax
+         , sbuf
          , Cap_norm);
-#ifdef FIELD_CURSOR
-      if (i == focus) { savcol = (i / rmax) * cmax; savrow = (i % rmax) + yRSVD; }
-#endif
-   }
-   if (xtra) {
-      putp(w->capclr_rownorm);
-      while ((p = strchr(xtra, '\n'))) {
-         ++i;
-         PUTT("%s%.*s"
-            , tg2((i / rmax) * cmax, (i % rmax) + yRSVD)
-            , (int)(p - xtra)
-            , xtra);
-         xtra = ++p;
-      }
    }
 
-#ifdef FIELD_CURSOR
-   putp(tg2(savcol+1, savrow));
-#endif
    putp(Caps_off);
+ #undef mxCOL
  #undef yRSVD
+ #undef xSUFX
+ #undef xPRFX
+ #undef xTOTL
 } // end: display_fields
 
 
@@ -1552,23 +1590,15 @@ static void fields_utility (void) {
    FLG_t f;
 
    putp(Cap_clr_scr);
-#ifdef FIELD_CURSOR
-   putp(Cap_curs_huge);
-#else
-   putp(Cap_curs_hide);
-#endif
    spewFI
 
    do {
       // advance past leading spaces, if any
       if (!h) for (h = Fieldstab[f].head; ' ' == *h; ++h) ;
-#ifdef FIELD_CURSOR
+      display_fields(i, (p != NULL));
-      show_special(1, fmtmk(FIELDS_heading, Cap_home, w->grpname, h));
+      putp(Cap_home);
-      display_fields(i, (p != NULL), FIELDS_notes);
+      show_special(1, fmtmk(FIELDS_heading, w->grpname, h));
-#else
+
-      display_fields(i, (p != NULL), FIELDS_notes);
-      show_special(1, fmtmk(FIELDS_heading, Cap_home, w->grpname, h));
-#endif
       switch (key = keyin(0)) {
          case kbd_UP:
             if (i > 0) { --i; if (p) swapEM }
@@ -1609,7 +1639,6 @@ static void fields_utility (void) {
             break;
       }
    } while (key && 'q' != key && kbd_ESC != key);
-   putp(Cap_curs_norm);
  #undef unSCRL
  #undef swapEM
  #undef spewFI
@@ -2072,7 +2101,7 @@ static void configs_read (void) {
             , Winstk[i].rc.winname, Winstk[i].rc.fieldscur);
 #if PFLAGSSIZ > 64
  // too bad fscanf is not as flexible with his format string as snprintf
- # error "Hey, fix the above fscanf 'PFLAGSSIZ' dependency !"
+ # error Hey, fix the above fscanf 'PFLAGSSIZ' dependency !
 #endif
          if (strlen(Winstk[i].rc.fieldscur) != sizeof(DEF_FIELDS) - 1)
 #ifndef RCFILE_NOERR
@@ -2131,7 +2160,7 @@ static void parse_args (char **args) {
       .  bunched args are actually handled properly and none are ignored
       .  we tolerate NO whitespace and NO switches -- maybe too tolerant? */
    static const char usage_str[] =
-      " -hv | -bcHisS -d delay -n iterations -u|U user | -p pid [,pid ...]";
+      " -hv | -bcHiSs -d delay -n iters -u|U user | -p pid[,pid] -w [cols]";
    static const char sel_error[] = "conflicting process selections (U/p/u)";
    static const char numbs_str[] = "+,-.0123456789";
    float tmp_delay = MAXFLOAT;
@@ -2217,8 +2246,23 @@ static void parse_args (char **args) {
                else error_exit(fmtmk("-%c missing name", ch));
                if ((errmsg = user_certify(Curwin, cp, ch))) error_exit(errmsg);
                cp += strlen(cp);
-            }
                break;
+            }
+            case 'w':
+            {  char *pn = NULL;
+               int ai = 0, ci = 0;
+               Width_mode = -1;
+               if (cp[1]) pn = (char*)&cp[1];
+               else if (*args) { pn = *args; ai = 1; }
+               if (pn && !(ci = strspn(pn, "0123456789"))) { ai = 0; pn = NULL; }
+               if (pn && (1 != sscanf(pn, "%d", &Width_mode)
+               || Width_mode < W_MIN_COL))
+                  error_exit(fmtmk("bad width arg '%s', must > %d", pn, W_MIN_COL-1));
+               cp++;
+               args += ai;
+               if (pn) cp = pn + ci;
+               continue;
+            }
             default :
                error_exit(fmtmk("unknown option '%c'\nusage:\t%s%s", *cp, Myname, usage_str));
 
@@ -2529,6 +2573,8 @@ static void wins_stage_2 (void) {
       win_names(&Winstk[i], Winstk[i].rc.winname);
       capsmk(&Winstk[i]);
    }
+   if (Batch)
+      OFFw(Curwin, View_SCROLL);
    // this guy will build each window's columnhdr
    calibrate_fields();
 } // end: wins_stage_2
@@ -3315,7 +3361,7 @@ static void task_show (const WIN_t *q, const proc_t *p) {
    PUFF("\n%s%s%s", (CHKw(q, Show_HIROWS) && 'R' == p->state)
       ? q->capclr_rowhigh : q->capclr_rownorm
       , rbuf
-      , Caps_endline);
+      , q->eolcap);
  #undef makeCOL
  #undef makeVAR
  #undef pages2K
@@ -3334,7 +3380,7 @@ static int window_show (proc_t **ppt, WIN_t *q, int wmax) {
    int i, lwin;
 
    // Display Column Headings -- and distract 'em while we sort (maybe)
-   PUFF("\n%s%s%s", q->capclr_hdr, q->columnhdr, Caps_endline);
+   PUFF("\n%s%s%s", q->capclr_hdr, q->columnhdr, q->eolcap);
 
    if (CHKw(q, Qsrt_NORMAL)) Frame_srtflg =  1;  // this one's always needed!
    else                      Frame_srtflg = -1;

top.h

@@ -25,7 +25,6 @@
 //#define CASEUP_HEXES            /* show any hex values in upper case       */
 //#define CASEUP_SUFIX            /* show time/mem/cnts suffix in upper case */
 //#define EQUCOLHDRYES            /* yes, do equalize column header lengths  */
-//#define FIELD_CURSOR            /* cursor follows selection w/ fields mgmt */
 //#define OFF_HST_HASH            /* use BOTH qsort+bsrch vs. hashing scheme */
 //#define OFF_STDIOLBF            /* disable our own stdout _IOFBF override  */
 //#define OOMEM_ENABLE            /* enable the SuSE out-of-memory additions *
@@ -33,11 +32,9 @@
 //#define PRETEND4CPUS            /* pretend we're smp with 4 ticsers (sic)  */
 //#define PRETENDNOCAP            /* use a terminal without essential caps   */
 //#define RCFILE_NOERR            /* rcfile errs silently default, vs. fatal */
-//#define RESIZE_LIMIT            /* enable limits on lower sigwinch bounds  */
 //#define RMAN_IGNORED            /* don't consider auto right margin glitch */
 //#define STRCMPNOCASE            /* use strcasecmp vs. strcmp when sorting  */
 //#define TERMIOS_ONLY            /* just limp along with native input only  */
-//#define TTYGETENVYES            /* environ vars can override tty col/row   */
 //#define USE_X_COLHDR            /* emphasize header vs. whole col, for 'x' */
 
 
@@ -86,12 +83,12 @@
         /* Specific process id monitoring support (command line only) */
 #define MONPIDMAX  20
 
+        /* Output override minimums (the -w switch and/or env vars) */
+#define W_MIN_COL  3
+#define W_MIN_ROW  3
+
         /* Miscellaneous buffers with liberal values and some other defines
            -- mostly just to pinpoint source code usage/dependancies */
-#ifdef RESIZE_LIMIT
-#define SCRCOLMIN    16
-#define SCRROWMIN     8
-#endif
 #define SCREENMAX   512
    /* the above might seem pretty stingy, until you consider that with every
       one of top's fields displayed it's less than 200 bytes of column header
@@ -314,6 +311,7 @@ typedef struct WIN_t {
 #else
           columnhdr [SCREENMAX],       // column headings for procflgs
 #endif
+         *eolcap,                      // window specific eol termcap
          *captab [CAPTABMAX];          // captab needed by show_special()
    struct WIN_t *next,                 // next window in window stack
                 *prev;                 // prior window in window stack
@@ -528,48 +526,11 @@ typedef struct WIN_t {
         /* Fields Management specially formatted string(s) --
            see 'show_special' for syntax details + other cautions */
 #define FIELDS_heading \
-   "%sFields Management\02 for window \01%s\06, whose current sort field is \01%s\02\n" \
+   "Fields Management\02 for window \01%s\06, whose current sort field is \01%s\02\n" \
    "   Navigate with Up/Dn, Right selects for move then <Enter> or Left commits,\n" \
    "   'd' or <Space> toggles display, 's' sets sort.  Use 'q' or <Esc> to end! " \
    ""
 
-#ifdef OOMEM_ENABLE
-        /* w/ 2 extra lines, no room for additional text on 24x80 terminal */
-#define FIELDS_notes  NULL
-#else
-        /* Extra explanatory text which could accompany the Fields display.
-           note: the newlines cannot actually be used, they just serve as
-                 substring delimiters for the 'display_fields' routine. */
-#define FIELDS_notes \
-   "Note(s):\n" \
-   "  Use the 'a' & 'w' keys to cycle\n" \
-   "  through all available windows.\n" \
-   ""
-/* no room in FIELDS_notes, sacrificed w/ 35 fields displayed .... */
-/* "  If a sort field is not displayed,\n"                         */
-/* "  the '<' & '>' keys are inactive.\n"                          */
-#endif
-
-#define FIELDS_flags \
-   "Flags field:\n" \
-   "  0x00000001  PF_ALIGNWARN\n" \
-   "  0x00000002  PF_STARTING\n" \
-   "  0x00000004  PF_EXITING\n" \
-   "  0x00000040  PF_FORKNOEXEC\n" \
-   "  0x00000100  PF_SUPERPRIV\n" \
-   "  0x00000200  PF_DUMPCORE\n" \
-   "  0x00000400  PF_SIGNALED\n" \
-   "  0x00000800  PF_MEMALLOC\n" \
-   "  0x00002000  PF_FREE_PAGES (2.5)\n" \
-   "  0x00008000  debug flag (2.5)\n" \
-   "  0x00024000  special threads (2.5)\n" \
-   "  0x001D0000  special states (2.5)\n" \
-   "  0x00100000  PF_USEDFPU (thru 2.4)\n" \
-   ""
-/* no room in FIELDS_flags, sacrificed w/ 26 fields displayed .... */
-/* ( PF_MEMDIE ==  'Killed for out-of-memory' )                    */
-/* "  0x00001000  PF_MEMDIE (2.5)\n"                               */
-
         /* Colors Help specially formatted string(s) --
            see 'show_special' for syntax details + other cautions. */
 #define COLOR_help \
@@ -638,6 +599,9 @@ typedef struct WIN_t {
 #if defined(PRETEND4CPUS) && defined (OOMEM_ENABLE)
 # error 'PRETEND4CPUS' conflicts with 'OOMEM_ENABLE'
 #endif
+#if (LRGBUFSIZ < SCREENMAX)
+# error 'LRGBUFSIZ' must NOT be less than 'SCREENMAX'
+#endif
 
 
 /*######  Some Prototypes (ha!)  #########################################*/
@@ -682,7 +646,7 @@ typedef struct WIN_t {
 /*atic FLD_t         Fieldstab[] = { ... }                                */
 //atic void          adj_geometry (void);
 //atic void          calibrate_fields (void);
-//atic void          display_fields (int focus, int extend, const char *xtra);
+//atic void          display_fields (int focus, int extend);
 //atic void          fields_utility (void);
 //atic void          zap_fieldstab (void);
 /*------  Library Interface  ---------------------------------------------*/