libbb: introduse and use signal_[no_]SA_RESTART_empty_mask and sigaction_set
signal_SA_RESTART_empty_mask - 65 +65 signal_no_SA_RESTART_empty_mask - 54 +54 dd_main 1325 1369 +44 sigaction_set - 19 +19 dname_enc 373 377 +4 UNSPEC_print 64 66 +2 setsignal 296 294 -2 bb_signals_recursive 95 92 -3 bb_askpass 367 361 -6 inetd_main 1810 1797 -13 rx_main 912 883 -29 sigdelset 32 - -32 __sigdelset 32 - -32 __GI_sigdelset 32 - -32 sighup_handler 84 37 -47 arping_main 1844 1797 -47 fsck_main 1869 1807 -62 run_list 1917 1844 -73 vlock_main 492 409 -83 progressmeter 883 798 -85 handle_incoming_and_exit 2737 2651 -86 ------------------------------------------------------------------------------ (add/remove: 3/3 grow/shrink: 3/12 up/down: 188/-632) Total: -444 bytes
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@@ -220,7 +220,6 @@ static void sigalrm_handler(int ATTRIBUTE_UNUSED signum)
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int rx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int rx_main(int argc, char **argv)
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{
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struct sigaction act;
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struct termios tty, orig_tty;
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int termios_err;
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int file_fd;
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@@ -243,9 +242,7 @@ int rx_main(int argc, char **argv)
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}
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/* No SA_RESTART: we want ALRM to interrupt read() */
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memset(&act, 0, sizeof(act));
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act.sa_handler = sigalrm_handler;
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sigaction(SIGALRM, &act, NULL);
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signal_no_SA_RESTART_empty_mask(SIGALRM, sigalrm_handler);
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n = receive(file_fd);
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