libiberty/sigsetmask.c

   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 PARAMS ((void)) ATTRIBUTE_NORETURN;
  25
  26 #ifdef SIG_SETMASK
  27 int
  28 DEFUN(sigsetmask,(set),
  29       int set)
  30 {
  31     sigset_t new;
  32     sigset_t old;
  33
  34     sigemptyset (&new);
  35     if (set != 0) {
  36       abort();  /* FIXME, we don't know how to translate old mask to new */
  37     }
  38     sigprocmask(SIG_SETMASK, &new, &old);
  39     return 1;   /* FIXME, we always return 1 as old value.  */
  40 }
  41 #endif