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procps
0045-top-standardize-Esc-key-support-with-promp...
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File 0045-top-standardize-Esc-key-support-with-prompted-input.patch of Package procps
From bef6b0f025a0638c37bf987039b65272f0fff587 Mon Sep 17 00:00:00 2001 From: Jim Warner <james.warner@comcast.net> Date: Sun, 27 Apr 2014 00:00:00 -0500 Subject: [PATCH] top: standardize <Esc> key support with prompted input In release 3.3.6, some commands were equipped with the concept of a 'default pid'. The initial implementation meant that the intuitive <Esc> key would not always be treated as one would expect under any well behaved UI. This patch ensures the expected <Esc> key behavior of: terminating user input while still making possible the necessary distinction between 'no input' & 'defaults'. Reference(s): http://www.freelists.org/post/procps/top-Escape-doesnt-abort-kill-command Signed-off-by: Jim Warner <james.warner@comcast.net> --- top/top.1 | 2 ++ top/top.c | 105 ++++++++++++++++++++++++++++++++++++------------------------- 2 files changed, 65 insertions(+), 42 deletions(-) diff --git top/top.1 top/top.1 index c15a871..67b8b35 100644 --- top/top.1 +++ top/top.1 @@ -1082,6 +1082,7 @@ depending on your progress: .nf 1) at the pid prompt, type an invalid number 2) at the signal prompt, type 0 (or any invalid signal) + 3) at any prompt, type <Esc> .fi .TP 7 @@ -1106,6 +1107,7 @@ depending on your progress: .nf 1) at the pid prompt, type an invalid number 2) at the nice prompt, type <Enter> with no input + 3) at any prompt, type <Esc> .fi .TP 7 diff --git top/top.c top/top.c index 0ae5388..9f33a05 100644 --- top/top.c +++ top/top.c @@ -1150,8 +1150,11 @@ static char *ioline (const char *prompt) { key = iokey(2); switch (key) { case 0: + buf[0] = '\0'; + return buf; case kbd_ESC: - buf[0] = '\0'; // fall through ! + buf[0] = kbd_ESC; + return buf; case kbd_ENTER: continue; case kbd_INS: @@ -1197,7 +1200,7 @@ static char *ioline (const char *prompt) { } putp(fmtmk("%s%s%s", tg2(beg, Msg_row), Cap_clr_eol, buf)); putp(tg2(beg+pos, Msg_row)); - } while (key && key != kbd_ENTER && key != kbd_ESC); + } while (key != kbd_ENTER); // weed out duplicates, including empty strings (top-of-stack)... for (i = 0, plin = anchor; ; i++) { @@ -1275,6 +1278,10 @@ static int readfile (FILE *fp, char **baddr, size_t *bsize, size_t *bread) { /*###### Small Utility routines ########################################*/ +#define GET_NUM_BAD INT_MIN +#define GET_NUM_ESC (INT_MIN + 1) +#define GET_NUM_NOT (INT_MIN + 2) + /* * Get a float from the user */ static float get_float (const char *prompt) { @@ -1282,20 +1289,18 @@ static float get_float (const char *prompt) { float f; line = ioline(prompt); - if (!line[0] || Frames_signal) return -1.0; + if (line[0] == kbd_ESC || Frames_signal) return GET_NUM_ESC; + if (!line[0]) return GET_NUM_NOT; // note: we're not allowing negative floats if (strcspn(line, "+,.0123456789")) { show_msg(N_txt(BAD_numfloat_txt)); - return -1.0; + return GET_NUM_BAD; } sscanf(line, "%f", &f); return f; } // 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) { @@ -1303,12 +1308,12 @@ static int get_int (const char *prompt) { int n; line = ioline(prompt); - if (Frames_signal) return GET_INT_BAD; - if (!line[0]) return GET_INTNONE; + if (line[0] == kbd_ESC || Frames_signal) return GET_NUM_ESC; + if (!line[0]) return GET_NUM_NOT; // note: we've got to allow negative ints (renice) if (strcspn(line, "-+0123456789")) { show_msg(N_txt(BAD_integers_txt)); - return GET_INT_BAD; + return GET_NUM_BAD; } sscanf(line, "%d", &n); return n; @@ -2918,7 +2923,9 @@ static void insp_find_str (int ch, int *col, int *row) { return; } if (ch == 'L' || ch == '/') { - snprintf(Insp_sel->fstr, FNDBUFSIZ, "%s", ioline(N_txt(GET_find_str_txt))); + char *str = ioline(N_txt(GET_find_str_txt)); + if (*str == kbd_ESC) return; + snprintf(Insp_sel->fstr, FNDBUFSIZ, "%s", str); Insp_sel->flen = strlen(Insp_sel->fstr); found = 0; } @@ -4135,7 +4142,9 @@ static void find_string (int ch) { return; } if ('L' == ch) { - snprintf(Curwin->findstr, FNDBUFSIZ, "%s", ioline(N_txt(GET_find_str_txt))); + char *str = ioline(N_txt(GET_find_str_txt)); + if (*str == kbd_ESC) return; + snprintf(Curwin->findstr, FNDBUFSIZ, "%s", str); Curwin->findlen = strlen(Curwin->findstr); found = 0; #ifndef USE_X_COLHDR @@ -4225,7 +4234,9 @@ static void other_selection (int ch) { sel = strstr; } glob = ioline(fmtmk(N_fmt(OSEL_prompts_fmt), Curwin->osel_tot + 1, typ)); - if (!snprintf(raw, sizeof(raw), "%s", glob)) return; + if (*glob == kbd_ESC + || !snprintf(raw, sizeof(raw), "%s", glob)) + return; for (osel = Curwin->osel_1st; osel; ) { if (!strcmp(osel->raw, glob)) { // #1: is criteria duplicate? show_msg(N_txt(OSEL_errdups_txt)); @@ -4343,7 +4354,7 @@ static void keys_global (int ch) { else { float tmp = get_float(fmtmk(N_fmt(DELAY_change_fmt), Rc.delay_time)); - if (-1 < tmp) Rc.delay_time = tmp; + if (tmp > -1) Rc.delay_time = tmp; } break; case 'E': @@ -4379,17 +4390,21 @@ static void keys_global (int ch) { if (Secure_mode) { show_msg(N_txt(NOT_onsecure_txt)); } else { - int pid, sig = SIGTERM, def = w->ppt[w->begtask]->tid; - if (GET_INT_BAD < (pid = get_int(fmtmk(N_txt(GET_pid2kill_fmt), def)))) { + int sig = SIGTERM, + def = w->ppt[w->begtask]->tid, + pid = get_int(fmtmk(N_txt(GET_pid2kill_fmt), def)); + if (pid > GET_NUM_ESC) { char *str; - if (0 > pid) pid = def; + if (pid == GET_NUM_NOT) pid = def; str = ioline(fmtmk(N_fmt(GET_sigs_num_fmt), pid, SIGTERM)); - if (*str) sig = signal_name_to_number(str); - if (Frames_signal) break; - if (0 < sig && kill(pid, sig)) - show_msg(fmtmk(N_fmt(FAIL_signals_fmt) - , pid, sig, strerror(errno))); - else if (0 > sig) show_msg(N_txt(BAD_signalid_txt)); + if (*str != kbd_ESC) { + if (*str) sig = signal_name_to_number(str); + if (Frames_signal) break; + if (0 < sig && kill(pid, sig)) + show_msg(fmtmk(N_fmt(FAIL_signals_fmt) + , pid, sig, strerror(errno))); + else if (0 > sig) show_msg(N_txt(BAD_signalid_txt)); + } } } break; @@ -4397,21 +4412,24 @@ static void keys_global (int ch) { if (Secure_mode) show_msg(N_txt(NOT_onsecure_txt)); else { - int val, pid, def = w->ppt[w->begtask]->tid; - if (GET_INT_BAD < (pid = get_int(fmtmk(N_txt(GET_pid2nice_fmt), def)))) { - 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))); + int val, + def = w->ppt[w->begtask]->tid, + pid = get_int(fmtmk(N_txt(GET_pid2nice_fmt), def)); + if (pid > GET_NUM_ESC) { + if (pid == GET_NUM_NOT) pid = def; + val = get_int(fmtmk(N_fmt(GET_nice_num_fmt), pid)); + if (val > GET_NUM_NOT + && 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; + if (wide > GET_NUM_NOT) { + if (wide > -1) Rc.fixed_widest = wide; + else Rc.fixed_widest = -1; } } break; @@ -4419,9 +4437,10 @@ static void keys_global (int ch) { if (!Inspect.total) ioline(N_txt(YINSP_noents_txt)); else { - int pid, def = w->ppt[w->begtask]->tid; - if (GET_INT_BAD < (pid = get_int(fmtmk(N_fmt(YINSP_pidsee_fmt), def)))) { - if (0 > pid) pid = def; + int def = w->ppt[w->begtask]->tid, + pid = get_int(fmtmk(N_fmt(YINSP_pidsee_fmt), def)); + if (pid > GET_NUM_ESC) { + if (pid == GET_NUM_NOT) pid = def; if (pid) inspection_utility(pid); } } @@ -4467,7 +4486,7 @@ static void keys_summary (int ch) { show_msg(N_txt(NUMA_nodenot_txt)); else { int num = get_int(fmtmk(N_fmt(NUMA_nodeget_fmt), Numa_node_tot -1)); - if (GET_INTNONE < num) { + if (num > GET_NUM_NOT) { if (num >= 0 && num < Numa_node_tot) { Numa_node_sel = num; SETw(w, View_CPUNOD | View_STATES); @@ -4503,7 +4522,7 @@ static void keys_task (int ch) { case 'n': if (VIZCHKw(w)) { int num = get_int(fmtmk(N_fmt(GET_max_task_fmt), w->rc.maxtasks)); - if (GET_INTNONE < num) { + if (num > GET_NUM_NOT) { if (-1 < num ) w->rc.maxtasks = num; else show_msg(N_txt(BAD_max_task_txt)); } @@ -4601,9 +4620,11 @@ static void keys_task (int ch) { case 'U': case 'u': if (VIZCHKw(w)) { - const char *errmsg; - if ((errmsg = user_certify(w, ioline(N_txt(GET_user_ids_txt)), ch))) - show_msg(errmsg); + const char *errmsg, *str = ioline(N_txt(GET_user_ids_txt)); + if (*str != kbd_ESC + && (errmsg = user_certify(w, str, ch))) + show_msg(errmsg); + } break; case 'V': @@ -4686,7 +4707,7 @@ static void keys_window (int ch) { if (ALTCHKw) { char tmp[SMLBUFSIZ]; STRLCPY(tmp, ioline(fmtmk(N_fmt(NAME_windows_fmt), w->rc.winname))); - if (tmp[0]) win_names(w, tmp); + if (tmp[0] && tmp[0] != kbd_ESC) win_names(w, tmp); } break; case kbd_UP: -- 1.7.9.2
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