binutils-gdb/libiberty/sigsetmask.c

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/* Version of sigsetmask.c
Written by Steve Chamberlain (sac@cygnus.com).
Contributed by Cygnus Support.
This file is in the public doamin. */
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/*
@deftypefn Supplemental int sigsetmask (int @var{set})
Sets the signal mask to the one provided in @var{set} and returns
the old mask (which, for libiberty's implementation, will always
be the value @code{1}).
@end deftypefn
*/
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#define _POSIX_SOURCE
#include <ansidecl.h>
/* Including <sys/types.h> seems to be needed by ISC. */
#include <sys/types.h>
#include <signal.h>
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extern void abort (void) ATTRIBUTE_NORETURN;
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#ifdef SIG_SETMASK
int
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sigsetmask (int set)
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{
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sigset_t new_sig;
sigset_t old_sig;
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sigemptyset (&new_sig);
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if (set != 0) {
abort(); /* FIXME, we don't know how to translate old mask to new */
}
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sigprocmask(SIG_SETMASK, &new_sig, &old_sig);
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return 1; /* FIXME, we always return 1 as old value. */
}
#endif