*: 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>

coreutils/dd.c

@@ -189,7 +189,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
 
 	memset(&Z, 0, sizeof(Z));
 	INIT_G();
-	//fflush(NULL); - is this needed because of NOEXEC?
+	//fflush_all(); - is this needed because of NOEXEC?
 
 	for (n = 1; argv[n]; n++) {
 		int what;

coreutils/dirname.c

@@ -23,5 +23,5 @@ int dirname_main(int argc, char **argv)
 
 	puts(dirname(argv[1]));
 
-	return fflush(stdout);
+	return fflush_all();
 }

coreutils/echo.c

@@ -141,7 +141,7 @@ int echo_main(int argc UNUSED_PARAM, char **argv)
 		bb_putchar('\n');
 	}
  ret:
-	return fflush(stdout);
+	return fflush_all();
 }
 
 /*-

coreutils/hostid.c

@@ -22,5 +22,5 @@ int hostid_main(int argc, char **argv UNUSED_PARAM)
 
 	printf("%lx\n", gethostid());
 
-	return fflush(stdout);
+	return fflush_all();
 }

coreutils/length.c

@@ -18,5 +18,5 @@ int length_main(int argc, char **argv)
 
 	printf("%u\n", (unsigned)strlen(*argv));
 
-	return fflush(stdout);
+	return fflush_all();
 }

coreutils/logname.c

@@ -36,7 +36,7 @@ int logname_main(int argc, char **argv UNUSED_PARAM)
 	/* Using _r function - avoid pulling in static buffer from libc */
 	if (getlogin_r(buf, sizeof(buf)) == 0) {
 		puts(buf);
-		return fflush(stdout);
+		return fflush_all();
 	}
 
 	bb_perror_msg_and_die("getlogin");

coreutils/pwd.c

@@ -20,7 +20,7 @@ int pwd_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 	if (buf != NULL) {
 		puts(buf);
 		free(buf);
-		return fflush(stdout);
+		return fflush_all();
 	}
 
 	return EXIT_FAILURE;

coreutils/seq.c

@@ -95,5 +95,5 @@ int seq_main(int argc, char **argv)
 	if (n) /* if while loop executed at least once */
 		bb_putchar('\n');
 
-	return fflush(stdout);
+	return fflush_all();
 }

coreutils/whoami.c

@@ -22,5 +22,5 @@ int whoami_main(int argc, char **argv UNUSED_PARAM)
 	/* Will complain and die if username not found */
 	puts(xuid2uname(geteuid()));
 
-	return fflush(stdout);
+	return fflush_all();
 }