sysdeps/unix/sysv/linux/signalfd.c

   1 /* Copyright (C) 2007 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #include <sys/signalfd.h>
  22 #include <sysdep.h>
  23
  24
  25 int
  26 signalfd (int fd, const sigset_t *mask, int flags)
  27 {
  28   /* The system call has no flag parameter which is bad.  So we have
  29      to wait until we have to support to pass additional values to the
  30      kernel (sys_indirect) before implementing setting flags like
  31      O_NONBLOCK etc.  */
  32   if (flags != 0)
  33     {
  34       __set_errno (EINVAL);
  35       return -1;
  36     }
  37
  38 #ifdef __NR_signalfd
  39   return INLINE_SYSCALL (signalfd, 3, fd, mask, _NSIG / 8);
  40 #else
  41   __set_errno (ENOSYS);
  42   return -1;
  43 #endif
  44 }