*: introduce and use ffulsh_all()

function                                             old     new   delta
buffer_fill_and_print                                179     196     +17
fflush_all                                             -       9      +9
spawn                                                 87      92      +5
rtcwake_main                                         455     453      -2
...
alarm_intr                                            93      84      -9
readcmd                                             1072    1062     -10
bb_ask                                               345     333     -12
more_main                                            845     832     -13
flush_stdout_stderr                                   42      23     -19
xfflush_stdout                                        27       -     -27
flush_stderr                                          30       -     -30
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 2/50 up/down: 31/-397)         Total: -366 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/flash_eraseall.c

@@ -43,7 +43,7 @@ static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
 	printf("\rErasing %d Kibyte @ %x -- %2llu %% complete.",
 		(unsigned)meminfo->erasesize / 1024, erase->start,
 		(unsigned long long) erase->start * 100 / meminfo->size);
-	fflush(stdout);
+	fflush_all();
 }
 
 int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;

miscutils/hdparm.c

@@ -1406,7 +1406,7 @@ static void do_time(int cache /*,int fd*/)
 	} else { /* Time device */
 		printf("Timing buffered disk reads:");
 	}
-	fflush(stdout);
+	fflush_all();
 
 	/* Now do the timing */
 	iterations = 0;

miscutils/less.c

@@ -157,7 +157,7 @@ struct globals {
 /* Reset terminal input to normal */
 static void set_tty_cooked(void)
 {
-	fflush(stdout);
+	fflush_all();
 	tcsetattr(kbd_fd, TCSANOW, &term_orig);
 }
 
@@ -835,7 +835,7 @@ static int getch_nowait(void)
 	/* Position cursor if line input is done */
 	if (less_gets_pos >= 0)
 		move_cursor(max_displayed_line + 2, less_gets_pos + 1);
-	fflush(stdout);
+	fflush_all();
 
 	if (kbd_input[0] == 0) { /* if nothing is buffered */
 #if ENABLE_FEATURE_LESS_WINCH