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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. */
  5.  
  6. /*
  7.  
  8. @deftypefn Supplemental int sigsetmask (int @var{set})
  9.  
  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}).
  13.  
  14. @end deftypefn
  15.  
  16. */
  17.  
  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>
  23.  
  24. extern void abort (void) ATTRIBUTE_NORETURN;
  25.  
  26. #ifdef SIG_SETMASK
  27. int
  28. sigsetmask (int set)
  29. {
  30.     sigset_t new_sig;
  31.     sigset_t old_sig;
  32.    
  33.     sigemptyset (&new_sig);
  34.     if (set != 0) {
  35.       abort();  /* FIXME, we don't know how to translate old mask to new */
  36.     }
  37.     sigprocmask(SIG_SETMASK, &new_sig, &old_sig);
  38.     return 1;   /* FIXME, we always return 1 as old value.  */
  39. }
  40. #endif
  41.