1944 static void record_pending_signo(int sig)  in record_pending_signo()  argument
1946 	sigaddset(&G.pending_set, sig);  in record_pending_signo()
1948 	if (sig == SIGCHLD) {  in record_pending_signo()
1955 static sighandler_t install_sighandler(int sig, sighandler_t handler)  in install_sighandler()  argument
1969 	sigaction(sig, &G.sa, &old_sa);  in install_sighandler()
2017 static void sigexit(int sig) NORETURN;
2018 static void sigexit(int sig)  in sigexit()  argument
2031 	if (sig <= 0)  in sigexit()
2032 		_exit(- sig);  in sigexit()
2034 	kill_myself_with_sig(sig); /* does not return */  in sigexit()
2043 static sighandler_t pick_sighandler(unsigned sig)  in pick_sighandler()  argument
2046 	if (sig < sizeof(unsigned)*8) {  in pick_sighandler()
2047 		unsigned sigmask = (1 << sig);  in pick_sighandler()
2120 		int sig;  in check_and_run_traps()  local
2124 		sig = 0;  in check_and_run_traps()
2126 			sig++;  in check_and_run_traps()
2127 			if (sigismember(&G.pending_set, sig)) {  in check_and_run_traps()
2128 				sigdelset(&G.pending_set, sig);  in check_and_run_traps()
2131 		} while (sig < NSIG);  in check_and_run_traps()
2135 		if (G_traps && G_traps[sig]) {  in check_and_run_traps()
2136 			debug_printf_exec("%s: sig:%d handler:'%s'\n", __func__, sig, G.traps[sig]);  in check_and_run_traps()
2137 			if (G_traps[sig][0]) {  in check_and_run_traps()
2143 				argv[1] = xstrdup(G_traps[sig]);  in check_and_run_traps()
2158 				last_sig = sig;  in check_and_run_traps()
2164 		switch (sig) {  in check_and_run_traps()
2166 			debug_printf_exec("%s: sig:%d default SIGINT handler\n", __func__, sig);  in check_and_run_traps()
2168 			last_sig = sig;  in check_and_run_traps()
2176 			debug_printf_exec("%s: sig:%d default SIGHUP handler\n", __func__, sig);  in check_and_run_traps()
2191 			debug_printf_exec("%s: sig:%d default SIGCHLD handler\n", __func__, sig);  in check_and_run_traps()
2201 			debug_printf_exec("%s: sig:%d default handling is to ignore\n", __func__, sig);  in check_and_run_traps()
7285 	unsigned sig = 0;  in switch_off_special_sigs()  local
7287 		sig++;  in switch_off_special_sigs()
7292 			if (G_traps[sig] && !G_traps[sig][0])  in switch_off_special_sigs()
7295 			free(G_traps[sig]);  in switch_off_special_sigs()
7296 			G_traps[sig] = NULL;  in switch_off_special_sigs()
7300 		install_sighandler(sig, SIG_DFL);  in switch_off_special_sigs()
7315 	IF_HUSH_TRAP(unsigned sig;)  in reset_traps_to_defaults()
7341 	for (sig = 0; sig < NSIG; sig++) {  in reset_traps_to_defaults()
7342 		if (!G_traps[sig])  in reset_traps_to_defaults()
7344 		if (!G_traps[sig][0])  in reset_traps_to_defaults()
7347 		free(G_traps[sig]);  in reset_traps_to_defaults()
7348 		G_traps[sig] = NULL;  in reset_traps_to_defaults()
7350 		if (sig == 0)  in reset_traps_to_defaults()
7352 		install_sighandler(sig, pick_sighandler(sig));  in reset_traps_to_defaults()
7395 		int sig;  in re_execute_shell()  local
7396 		for (sig = 1; sig < NSIG; sig++) {  in re_execute_shell()
7397 			if (G_traps[sig] && !G_traps[sig][0])  in re_execute_shell()
7398 				empty_trap_mask |= 1LL << sig;  in re_execute_shell()
8931 					int sig = WTERMSIG(status);  in process_wait_result()  local
8940 						puts(sig == SIGINT || sig == SIGPIPE ? "" : strsignal(sig));  in process_wait_result()
8947 					ex = 128 | sig;  in process_wait_result()
10062 	unsigned sig = 0;  in install_sighandlers()  local
10064 		sig++;  in install_sighandlers()
10067 		old_handler = install_sighandler(sig, pick_sighandler(sig));  in install_sighandlers()
10072 		if (sig == SIGCHLD)  in install_sighandlers()
10079 		if (sig == SIGHUP && G_interactive_fd)  in install_sighandlers()
10084 			install_sighandler(sig, old_handler);  in install_sighandlers()
10088 			free(G_traps[sig]);  in install_sighandlers()
10089 			G_traps[sig] = xzalloc(1); /* == xstrdup(""); */  in install_sighandlers()
10408 				IF_HUSH_TRAP(int sig;)  in hush_main()
10412 				for (sig = 1; sig < NSIG; sig++) {  in hush_main()
10413 					if (empty_trap_mask & (1LL << sig)) {  in hush_main()
10414 						G_traps[sig] = xzalloc(1); /* == xstrdup(""); */  in hush_main()
10415 						install_sighandler(sig, SIG_IGN);  in hush_main()
11017 		unsigned sig = check_and_run_traps();  in builtin_read()  local
11018 		if (sig != SIGINT)  in builtin_read()
11593 	int sig;  in builtin_trap()  local
11620 	sig = bb_strtou(*argv, NULL, 10);  in builtin_trap()
11628 			sig = get_signum(*argv++);  in builtin_trap()
11629 			if (sig < 0) {  in builtin_trap()
11636 			free(G_traps[sig]);  in builtin_trap()
11637 			G_traps[sig] = xstrdup(new_cmd);  in builtin_trap()
11640 				get_signame(sig), sig, G_traps[sig]);  in builtin_trap()
11643 			if (sig == 0)  in builtin_trap()
11650 				handler = pick_sighandler(sig);  in builtin_trap()
11651 			install_sighandler(sig, handler);  in builtin_trap()
11869 		int sig;  in wait_for_child_or_signal()  local
11941 		sig = check_and_run_traps();  in wait_for_child_or_signal()
11942 		if (sig /*&& sig != SIGCHLD - always true */) {  in wait_for_child_or_signal()
11944 			ret = 128 | sig;  in wait_for_child_or_signal()