sysdeps/unix/sysv/linux/s390/bits/sigaction.h

   1 /* Definitions for 31 & 64 bit S/390 sigaction.
   2    Copyright (C) 2001-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SIGNAL_H
  20 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
  21 #endif
  22
  23 #include <bits/wordsize.h>
  24
  25 #if __WORDSIZE == 64
  26 /* Structure describing the action to be taken when a signal arrives.  */
  27 struct sigaction
  28   {
  29     /* Signal handler.  */
  30 #ifdef __USE_POSIX199309
  31     union
  32       {
  33         /* Used if SA_SIGINFO is not set.  */
  34         __sighandler_t sa_handler;
  35         /* Used if SA_SIGINFO is set.  */
  36         void (*sa_sigaction) (int, siginfo_t *, void *);
  37       }
  38     __sigaction_handler;
  39 # define sa_handler     __sigaction_handler.sa_handler
  40 # define sa_sigaction   __sigaction_handler.sa_sigaction
  41 #else
  42     __sighandler_t sa_handler;
  43 #endif
  44
  45     /* Special flags.  */
  46     int __glibc_reserved0;
  47     int sa_flags;
  48
  49     /* Restore handler.  */
  50     void (*sa_restorer) (void);
  51
  52     /* Additional set of signals to be blocked.  */
  53     __sigset_t sa_mask;
  54   };
  55 #else
  56 /* Structure describing the action to be taken when a signal arrives.  */
  57 struct sigaction
  58   {
  59     /* Signal handler.  */
  60 #ifdef __USE_POSIX199309
  61     union
  62       {
  63         /* Used if SA_SIGINFO is not set.  */
  64         __sighandler_t sa_handler;
  65         /* Used if SA_SIGINFO is set.  */
  66         void (*sa_sigaction) (int, siginfo_t *, void *);
  67       }
  68     __sigaction_handler;
  69 # define sa_handler     __sigaction_handler.sa_handler
  70 # define sa_sigaction   __sigaction_handler.sa_sigaction
  71 #else
  72     __sighandler_t sa_handler;
  73 #endif
  74
  75     /* Additional set of signals to be blocked.  */
  76     __sigset_t sa_mask;
  77
  78     /* Special flags.  */
  79     int sa_flags;
  80
  81     /* Restore handler.  */
  82     void (*sa_restorer) (void);
  83   };
  84 #endif
  85
  86 /* Bits in `sa_flags'.  */
  87 #define SA_NOCLDSTOP  1          /* Don't send SIGCHLD when children stop.  */
  88 #define SA_NOCLDWAIT  2          /* Don't create zombie on child death.  */
  89 #define SA_SIGINFO    4          /* Invoke signal-catching function with
  90                                     three arguments instead of one.  */
  91 #if defined __USE_UNIX98 || defined __USE_MISC
  92 # define SA_ONSTACK   0x08000000 /* Use signal stack by using `sa_restorer'. */
  93 #endif
  94 #if defined __USE_UNIX98 || defined __USE_XOPEN2K8
  95 # define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */
  96 # define SA_NODEFER   0x40000000 /* Don't automatically block the signal when
  97                                     its handler is being executed.       */
  98 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */
  99 #endif
 100 #ifdef __USE_MISC
 101 # define SA_INTERRUPT 0x20000000 /* Historical no-op.  */
 102
 103 /* Some aliases for the SA_ constants.  */
 104 # define SA_NOMASK    SA_NODEFER
 105 # define SA_ONESHOT   SA_RESETHAND
 106 # define SA_STACK     SA_ONSTACK
 107 #endif
 108
 109 /* Values for the HOW argument to `sigprocmask'.  */
 110 #define SIG_BLOCK     0          /* Block signals.  */
 111 #define SIG_UNBLOCK   1          /* Unblock signals.  */
 112 #define SIG_SETMASK   2          /* Set the set of blocked signals.  */