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
diff --git a/include/libbb.h b/include/libbb.h
index 3c53e5e..505396b 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -275,6 +275,7 @@
char *xmalloc_follow_symlinks(const char *path);
+
enum {
/* bb_signals(BB_SIGS_FATAL, handler) catches all signals which
* otherwise would kill us, except for those resulting from bugs:
@@ -306,6 +307,12 @@
* and in a way that while signal handler is run, no other signals
* will be blocked: */
void bb_signals_recursive(int sigs, void (*f)(int));
+/* syscalls like read() will be interrupted with EINTR: */
+void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int));
+/* syscalls like read() won't be interrupted (though select/poll will be): */
+void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int));
+/* Will do sigaction(signum, act, NULL): */
+int sigaction_set(int signum, const struct sigaction *act);
void sig_block(int);
void sig_unblock(int);
/* UNUSED: void sig_blocknone(void); */