top: kill/nice provide for a default pid

As an aid to the above 2 commands, and as a prelude to
an upcoming 'inspect other output' capability, the act
of selecting a process for either has been simplified.

Positioning a task as the first one displayed, via the
up/down arrow keys, will now establish it as a default
selection for the appropriate command.  Thus, that pid
will then be incorporated in a subsequent input prompt.

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

top/top.c

@@ -1068,17 +1068,20 @@ static float get_float (const char *prompt) {
 } // end: get_float
 
 
+#define GET_INT_BAD  INT_MIN
+#define GET_INTNONE (INT_MIN + 1)
+
         /*
          * Get an integer from the user, returning INT_MIN for error */
 static int get_int (const char *prompt) {
    char *line;
    int n;
 
-   if (!(*(line = linein(prompt)))) return INT_MIN;
+   if (!(*(line = linein(prompt)))) return GET_INTNONE;
    // note: we've got to allow negative ints (renice)
    if (strcspn(line, "-+0123456789")) {
       show_msg(N_txt(BAD_integers_txt));
-      return INT_MIN;
+      return GET_INT_BAD;
    }
    sscanf(line, "%d", &n);
    return n;
@@ -3132,10 +3135,10 @@ static void keys_global (int ch) {
          if (Secure_mode) {
             show_msg(N_txt(NOT_onsecure_txt));
          } else {
-            int pid, sig = SIGTERM;
+            int pid, sig = SIGTERM, def = w->ppt[w->begtask]->tid;
-            char *str;
+            if (GET_INT_BAD < (pid = get_int(fmtmk(N_txt(GET_pid2kill_fmt), def)))) {
-            if (-1 < (pid = get_int(N_txt(GET_pid2kill_txt)))) {
+               char *str = linein(fmtmk(N_fmt(GET_sigs_num_fmt), pid, SIGTERM));
-               str = linein(fmtmk(N_fmt(GET_sigs_num_fmt), pid, SIGTERM));
+               if (0 > pid) pid = def;
                if (*str) sig = signal_name_to_number(str);
                if (0 < sig && kill(pid, sig))
                   show_msg(fmtmk(N_fmt(FAIL_signals_fmt)
@@ -3148,19 +3151,23 @@ static void keys_global (int ch) {
          if (Secure_mode)
             show_msg(N_txt(NOT_onsecure_txt));
          else {
-            int val, pid;
+            int val, pid, def = w->ppt[w->begtask]->tid;
-            if (-1 < (pid = get_int(N_txt(GET_pid2nice_txt)))
+            if (GET_INT_BAD < (pid = get_int(fmtmk(N_txt(GET_pid2nice_fmt), def)))) {
-            && INT_MIN < (val = get_int(fmtmk(N_fmt(GET_nice_num_fmt), pid))))
+               if (0 > pid) pid = def;
+               if (GET_INTNONE < (val = get_int(fmtmk(N_fmt(GET_nice_num_fmt), pid))))
                   if (setpriority(PRIO_PROCESS, (unsigned)pid, val))
                      show_msg(fmtmk(N_fmt(FAIL_re_nice_fmt)
                         , pid, val, strerror(errno)));
             }
+         }
          break;
       case 'X':
       {  int wide = get_int(fmtmk(N_fmt(XTRA_fixwide_fmt), Rc.fixed_widest));
+         if (GET_INTNONE < wide) {
             if (-1 < wide) Rc.fixed_widest = wide;
             else if (INT_MIN < wide) Rc.fixed_widest = -1;
          }
+      }
          break;
       case 'Z':
          wins_colors();

top/top_nls.c

@@ -314,11 +314,11 @@ static void build_norm_nlstab (void) {
    Norm_nlstab[DELAY_change_fmt] = _("Change delay from %.1f to");
    Norm_nlstab[THREADS_show_fmt] = _("Show threads %s");
    Norm_nlstab[IRIX_curmode_fmt] = _("Irix mode %s");
-   Norm_nlstab[GET_pid2kill_txt] = _("pid to signal/kill");
+   Norm_nlstab[GET_pid2kill_fmt] = _("PID to signal/kill [default pid = %d]");
    Norm_nlstab[GET_sigs_num_fmt] = _("Send pid %d signal [%d/sigterm]");
    Norm_nlstab[FAIL_signals_fmt] = _("Failed signal pid '%d' with '%d': %s");
    Norm_nlstab[BAD_signalid_txt] = _("Invalid signal");
-   Norm_nlstab[GET_pid2nice_txt] = _("PID to renice");
+   Norm_nlstab[GET_pid2nice_fmt] = _("PID to renice [default pid = %d]");
    Norm_nlstab[GET_nice_num_fmt] = _("Renice PID %d to value");
    Norm_nlstab[FAIL_re_nice_fmt] = _("Failed renice of PID %d to %d: %s");
    Norm_nlstab[NAME_windows_fmt] = _("Rename window '%s' to (1-3 chars)");

top/top_nls.h

@@ -72,7 +72,7 @@ enum norm_nls {
    FAIL_statget_txt, FAIL_statopn_fmt, FAIL_tty_get_txt, FAIL_tty_mod_fmt,
    FAIL_tty_raw_fmt, FAIL_widecpu_txt, FAIL_widepid_txt, FIND_no_find_fmt,
    FIND_no_next_txt, FOREST_modes_fmt, FOREST_views_txt, GET_find_str_txt,
-   GET_max_task_fmt, GET_nice_num_fmt, GET_pid2kill_txt, GET_pid2nice_txt,
+   GET_max_task_fmt, GET_nice_num_fmt, GET_pid2kill_fmt, GET_pid2nice_fmt,
    GET_sigs_num_fmt, GET_user_ids_txt, HELP_cmdline_fmt, HILIGHT_cant_txt,
    IRIX_curmode_fmt, LIMIT_exceed_fmt, MISSING_args_fmt, NAME_windows_fmt,
    NOT_onsecure_txt, NOT_smp_cpus_txt, OFF_one_word_txt, ON_word_only_txt,