inetd: suppress aliasing warning

function                                             old     new   delta
sigprocmask2                                           -       8      +8
wait_for_child_or_signal                             213     218      +5
dowait                                               424     429      +5
block_CHLD_HUP_ALRM                                   62      59      -3
sigprocmask_SIG_SETMASK                               16       -     -16
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 2/1 up/down: 18/-19)             Total: -1 bytes

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

include/libbb.h

@@ -544,8 +544,8 @@ void sig_unblock(int sig) FAST_FUNC;
 int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
 /* SIG_BLOCK/SIG_UNBLOCK all signals: */
 int sigprocmask_allsigs(int how) FAST_FUNC;
-/* SIG_SETMASK set, and return old set in the same set: */
-int sigprocmask_SIG_SETMASK(sigset_t *set) FAST_FUNC;
+/* Return old set in the same set: */
+int sigprocmask2(int how, sigset_t *set) FAST_FUNC;
 /* Standard handler which just records signo */
 extern smallint bb_got_signal;
 void record_signo(int signo); /* not FAST_FUNC! */

libbb/signals.c

@@ -31,14 +31,14 @@ int FAST_FUNC sigprocmask_allsigs(int how)
 	return sigprocmask(how, &set, NULL);
 }
 
-int FAST_FUNC sigprocmask_SIG_SETMASK(sigset_t *set)
+int FAST_FUNC sigprocmask2(int how, sigset_t *set)
 {
 	// Grr... gcc 8.1.1:
 	// "passing argument 3 to restrict-qualified parameter aliases with argument 2"
 	// dance around that...
 	sigset_t *oset FIX_ALIASING;
 	oset = set;
-	return sigprocmask(SIG_SETMASK, set, oset);
+	return sigprocmask(how, set, oset);
 }
 
 void FAST_FUNC bb_signals(int sigs, void (*f)(int))

networking/inetd.c

@@ -488,7 +488,7 @@ static void block_CHLD_HUP_ALRM(sigset_t *m)
 	sigaddset(m, SIGCHLD);
 	sigaddset(m, SIGHUP);
 	sigaddset(m, SIGALRM);
-	sigprocmask(SIG_BLOCK, m, m); /* old sigmask is stored in m */
+	sigprocmask2(SIG_BLOCK, m); /* old sigmask is stored in m */
 }
 
 static void restore_sigmask(sigset_t *m)

shell/ash.c

@@ -4217,7 +4217,7 @@ wait_block_or_sig(int *status)
 		/* Children exist, but none are ready. Sleep until interesting signal */
 #if 1
 		sigfillset(&mask);
-		sigprocmask_SIG_SETMASK(&mask); /* mask is updated */
+		sigprocmask2(SIG_SETMASK, &mask); /* mask is updated */
 		while (!got_sigchld && !pending_sig)
 			sigsuspend(&mask);
 		sigprocmask(SIG_SETMASK, &mask, NULL);

shell/hush.c

@@ -11442,7 +11442,7 @@ static int wait_for_child_or_signal(struct pipe *waitfor_pipe, pid_t waitfor_pid
 		 * and get stuck in sigsuspend...
 		 */
 		sigfillset(&oldset); /* block all signals, remember old set */
-		sigprocmask_SIG_SETMASK(&oldset);
+		sigprocmask2(SIG_SETMASK, &oldset);
 
 		if (!sigisemptyset(&G.pending_set)) {
 			/* Crap! we raced with some signal! */