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[binutils.git] / libiberty / sigsetmask.c
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1 /* Version of sigsetmask.c
2 Written by Steve Chamberlain (sac@cygnus.com).
3 Contributed by Cygnus Support.
4 This file is in the public doamin. */
6 /*
8 @deftypefn Supplemental int sigsetmask (int @var{set})
10 Sets the signal mask to the one provided in @var{set} and returns
11 the old mask (which, for libiberty's implementation, will always
12 be the value @code{1}).
14 @end deftypefn
18 #define _POSIX_SOURCE
19 #include <ansidecl.h>
20 /* Including <sys/types.h> seems to be needed by ISC. */
21 #include <sys/types.h>
22 #include <signal.h>
24 extern void abort (void) ATTRIBUTE_NORETURN;
26 #ifdef SIG_SETMASK
27 int
28 sigsetmask (int set)
30 sigset_t new_sig;
31 sigset_t old_sig;
33 sigemptyset (&new_sig);
34 if (set != 0) {
35 abort(); /* FIXME, we don't know how to translate old mask to new */
37 sigprocmask(SIG_SETMASK, &new_sig, &old_sig);
38 return 1; /* FIXME, we always return 1 as old value. */
40 #endif