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top: standardize <Esc> key support with prompted input

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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>
This commit is contained in:
Jim Warner 2014-04-27 00:00:00 -05:00 committed by Jaromir Capik
parent fe37ad15cd
commit bef6b0f025
2 changed files with 65 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
top/top.1
View File

@ -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

87
top/top.c
View File

@ -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':
@ -4379,11 +4390,14 @@ 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 != kbd_ESC) {
if (*str) sig = signal_name_to_number(str);
if (Frames_signal) break;
if (0 < sig && kill(pid, sig))
@ -4392,16 +4406,20 @@ static void keys_global (int ch) {
else if (0 > sig) show_msg(N_txt(BAD_signalid_txt));
}
}
}
break;
case 'r':
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))
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)));
}
@ -4409,9 +4427,9 @@ static void keys_global (int ch) {
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)))
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: