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top: refine some miscellaneous signals interrupt stuff

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This commit mostly justs renames a few identifiers but
it also will now suppress any end-of-job report if top
wasn't ended via the 'q' key convention (i.e. signal).

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2013-06-30 00:00:00 -05:00 committed by Jaromir Capik
parent 5c974ff44d
commit 25ed080eaa
2 changed files with 27 additions and 25 deletions
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48
top/top.c
View File

@ -174,7 +174,7 @@ static WIN_t *Curwin;
and/or that are simply more efficiently handled as globals
[ 'Frames_...' (plural) stuff persists beyond 1 frame ]
[ or are used in response to async signals received ! ] */
static volatile int Frames_resize; // time to rebuild all column headers
static volatile int Frames_signal; // time to rebuild all column headers
static int Frames_libflags; // PROC_FILLxxx flags
static int Frame_maxtask; // last known number of active tasks
// ie. current 'size' of proc table
@ -377,7 +377,7 @@ static void bye_bye (const char *str) {
at_eoj(); // restore tty in preparation for exit
#ifdef ATEOJ_RPTSTD
{ proc_t *p;
if (!str && Ttychanged) { fprintf(stderr,
if (!str && !Frames_signal && Ttychanged) { fprintf(stderr,
"\n%s's Summary report:"
"\n\tProgram"
"\n\t Linux version = %u.%u.%u, %s"
@ -447,7 +447,7 @@ static void bye_bye (const char *str) {
#ifndef OFF_HST_HASH
#ifdef ATEOJ_RPTHSH
if (!str && Ttychanged) {
if (!str && !Frames_signal && Ttychanged) {
int i, j, pop, total_occupied, maxdepth, maxdepth_sav, numdepth
, cross_foot, sz = HHASH_SIZ * (unsigned)sizeof(int);
int depths[HHASH_SIZ];
@ -588,6 +588,7 @@ static void sig_endpgm (int dont_care_sig) {
// POSIX.1-2004 async-signal-safe: sigfillset, sigprocmask
sigfillset(&ss);
sigprocmask(SIG_BLOCK, &ss, NULL);
Frames_signal = BREAK_sig;
bye_bye(NULL);
(void)dont_care_sig;
} // end: sig_endpgm
@ -619,7 +620,7 @@ static void sig_paused (int dont_care_sig) {
#endif
if (keypad_xmit) putp(keypad_xmit);
putp(Cursor_state);
Frames_resize = RESIZ_sig;
Frames_signal = BREAK_sig;
(void)dont_care_sig;
} // end: sig_paused
@ -630,7 +631,7 @@ static void sig_paused (int dont_care_sig) {
static void sig_resize (int dont_care_sig) {
// POSIX.1-2004 async-signal-safe: tcdrain
tcdrain(STDOUT_FILENO);
Frames_resize = RESIZ_sig;
Frames_signal = BREAK_sig;
(void)dont_care_sig;
} // end: sig_resize
@ -928,12 +929,13 @@ static inline int ioa (struct timespec *ts) {
FD_ZERO(&fs);
FD_SET(STDIN_FILENO, &fs);
#ifndef SIGNALS_LESS // conditional comments are silly, but help in documenting
// hold here until we've got keyboard input, any signal (including SIGWINCH)
#else
#ifdef SIGNALS_LESS // conditional comments are silly, but help in documenting
// hold here until we've got keyboard input, any signal except SIGWINCH
#endif
// or (optionally) we timeout with nanosecond granularity
#else
// hold here until we've got keyboard input, any signal (including SIGWINCH)
// or (optionally) we timeout with nanosecond granularity
#endif
rc = pselect(STDIN_FILENO + 1, &fs, NULL, NULL, ts, &Sigwinch_set);
if (rc < 0) rc = 0;
@ -1263,7 +1265,7 @@ static float get_float (const char *prompt) {
float f;
line = ioline(prompt);
if (!line[0] || Frames_resize) return -1.0;
if (!line[0] || Frames_signal) return -1.0;
// note: we're not allowing negative floats
if (strcspn(line, "+,.0123456789")) {
show_msg(N_txt(BAD_numfloat_txt));
@ -1284,7 +1286,7 @@ static int get_int (const char *prompt) {
int n;
line = ioline(prompt);
if (Frames_resize) return GET_INT_BAD;
if (Frames_signal) return GET_INT_BAD;
if (!line[0]) return GET_INTNONE;
// note: we've got to allow negative ints (renice)
if (strcspn(line, "-+0123456789")) {
@ -1822,7 +1824,7 @@ static void adj_geometry (void) {
PSU_CLREOS(0);
fflush(stdout);
Frames_resize = RESIZ_clr;
Frames_signal = BREAK_off;
} // end: adj_geometry
@ -2134,7 +2136,7 @@ signify_that:
display_fields(i, (p != NULL));
fflush(stdout);
if (Frames_resize) goto signify_that;
if (Frames_signal) goto signify_that;
key = iokey(1);
if (key < 1) goto signify_that;
@ -3053,7 +3055,7 @@ signify_that:
lest repeated <Enter> keys produce immediate re-selection in caller */
tcflush(STDIN_FILENO, TCIFLUSH);
if (Frames_resize) goto signify_that;
if (Frames_signal) goto signify_that;
key = iokey(1);
if (key < 1) goto signify_that;
@ -3158,7 +3160,7 @@ signify_that:
, pid, p->cmd, p->euser, sels));
INSP_MKSL(0, " ");
if (Frames_resize) goto signify_that;
if (Frames_signal) goto signify_that;
if (key == INT_MAX) key = iokey(1);
if (key < 1) goto signify_that;
@ -3903,7 +3905,7 @@ signify_that:
putp(Cap_clr_eos);
fflush(stdout);
if (Frames_resize) goto signify_that;
if (Frames_signal) goto signify_that;
key = iokey(1);
if (key < 1) goto signify_that;
@ -4135,7 +4137,7 @@ signify_that:
putp(Cap_clr_eos);
fflush(stdout);
if (Frames_resize) goto signify_that;
if (Frames_signal) goto signify_that;
key = iokey(1);
if (key < 1) goto signify_that;
@ -4151,7 +4153,7 @@ signify_that:
, Winstk[2].rc.winname, Winstk[3].rc.winname));
putp(Cap_clr_eos);
fflush(stdout);
if (Frames_resize || (key = iokey(1)) < 1) {
if (Frames_signal || (key = iokey(1)) < 1) {
adj_geometry();
putp(Cap_clr_scr);
} else w = win_select(key);
@ -4341,7 +4343,7 @@ static void keys_global (int ch) {
if (0 > pid) pid = def;
str = ioline(fmtmk(N_fmt(GET_sigs_num_fmt), pid, SIGTERM));
if (*str) sig = signal_name_to_number(str);
if (Frames_resize) break;
if (Frames_signal) break;
if (0 < sig && kill(pid, sig))
show_msg(fmtmk(N_fmt(FAIL_signals_fmt)
, pid, sig, strerror(errno)));
@ -4909,12 +4911,12 @@ static void do_key (int ch) {
for (i = 0; i < MAXTBL(key_tab); ++i)
if (strchr(key_tab[i].keys, ch)) {
key_tab[i].func(ch);
Frames_resize = RESIZ_kbd;
Frames_signal = BREAK_kbd;
putp((Cursor_state = Cap_curs_hide));
return;
}
};
/* Frames_resize above will force a rebuild of all column headers and
/* Frames_signal above will force a rebuild of all column headers and
the PROC_FILLxxx flags. It's NOT simply lazy programming. Here are
some keys that COULD require new column headers and/or libproc flags:
'A' - likely
@ -5458,7 +5460,7 @@ static void frame_make (void) {
int i, scrlins;
// deal with potential signal(s) since the last time around...
if (Frames_resize)
if (Frames_signal)
zap_fieldstab();
// whoa either first time or thread/task mode change, (re)prime the pump...
@ -5549,7 +5551,7 @@ int main (int dont_care_argc, char **argv) {
produce a screen refresh. in this main loop frame_make
assumes responsibility for such refreshes. other logic
in contact with users must deal more obliquely with an
interrupt/refresh (hint: Frames_resize + return code)!
interrupt/refresh (hint: Frames_signal + return code)!
(everything is perfectly justified plus right margins)
(are completely filled, but of course it must be luck)

4
top/top.h
View File

@ -208,9 +208,9 @@ enum scale_enum {
SK_Kb, SK_Mb, SK_Gb, SK_Tb, SK_Pb, SK_Eb, SK_SENTINEL
};
/* Used to manipulate (and document) the Frames_resize states */
/* Used to manipulate (and document) the Frames_signal states */
enum resize_states {
RESIZ_clr, RESIZ_kbd, RESIZ_sig
BREAK_off = 0, BREAK_kbd, BREAK_sig
};
/* This typedef just ensures consistent 'process flags' handling */