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