include/signal.h

   1 /*      $OpenBSD: signal.h,v 1.20 2012/12/05 23:19:57 deraadt Exp $     */
   2 /*      $NetBSD: signal.h,v 1.8 1996/02/29 00:04:57 jtc Exp $   */
   3
   4 /*-
   5  * Copyright (c) 1991, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)signal.h    8.3 (Berkeley) 3/30/94
  33  */
  34
  35 #ifndef _USER_SIGNAL_H
  36 #define _USER_SIGNAL_H
  37
  38 #include <sys/signal.h>
  39
  40 #if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
  41 #include <sys/types.h>
  42 #endif
  43
  44 __BEGIN_DECLS
  45 #if __BSD_VISIBLE
  46 extern __const char *__const sys_signame[_NSIG];
  47 extern __const char *__const sys_siglist[_NSIG];
  48 #endif
  49
  50 int     raise(int);
  51 #if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
  52 #if __BSD_VISIBLE || (__XPG_VISIBLE >= 500 && __XPG_VISIBLE < 700)
  53 void    (*bsd_signal(int, void (*)(int)))(int);
  54 #endif
  55 int     kill(pid_t, int);
  56 int     sigaction(int, const struct sigaction *__restrict,
  57             struct sigaction *__restrict);
  58 int     sigaddset(sigset_t *, int);
  59 int     sigdelset(sigset_t *, int);
  60 int     sigemptyset(sigset_t *);
  61 int     sigfillset(sigset_t *);
  62 int     sigismember(const sigset_t *, int);
  63 int     sigpending(sigset_t *);
  64 int     sigprocmask(int, const sigset_t *__restrict, sigset_t *__restrict);
  65 #if __POSIX_VISIBLE >= 199506
  66 int     pthread_sigmask(int, const sigset_t *__restrict, sigset_t *__restrict);
  67 #endif
  68 int     sigsuspend(const sigset_t *);
  69
  70 #if !defined(_ANSI_LIBRARY) && !defined(lint)
  71
  72 extern int *__errno(void);
  73
  74 __only_inline int sigaddset(sigset_t *__set, int __signo) {
  75         if (__signo <= 0 || __signo >= _NSIG) {
  76                 *__errno() = 22;                /* EINVAL */
  77                 return -1;
  78         }
  79         *__set |= (1U << ((__signo)-1));        /* sigmask(__signo) */
  80         return (0);
  81 }
  82
  83 __only_inline int sigdelset(sigset_t *__set, int __signo) {
  84         if (__signo <= 0 || __signo >= _NSIG) {
  85                 *__errno() = 22;                /* EINVAL */
  86                 return -1;
  87         }
  88         *__set &= ~(1U << ((__signo)-1));       /* sigmask(__signo) */
  89         return (0);
  90 }
  91
  92 __only_inline int sigismember(const sigset_t *__set, int __signo) {
  93         if (__signo <= 0 || __signo >= _NSIG) {
  94                 *__errno() = 22;                /* EINVAL */
  95                 return -1;
  96         }
  97         return ((*__set & (1U << ((__signo)-1))) != 0);
  98 }
  99 #endif /* !_ANSI_LIBRARY && !lint */
 100
 101 /* List definitions after function declarations, or Reiser cpp gets upset. */
 102 #define sigemptyset(set)        (*(set) = 0, 0)
 103 #define sigfillset(set)         (*(set) = ~(sigset_t)0, 0)
 104
 105 #if __BSD_VISIBLE || __XPG_VISIBLE >= 420
 106 int     killpg(pid_t, int);
 107 int     siginterrupt(int, int);
 108 int     sigpause(int);
 109 int     sigaltstack(const struct sigaltstack *__restrict,
 110             struct sigaltstack *__restrict);
 111 #if __BSD_VISIBLE
 112 int     sigblock(int);
 113 int     sigreturn(struct sigcontext *);
 114 int     sigsetmask(int);
 115 int     sigvec(int, struct sigvec *, struct sigvec *);
 116 #endif
 117 #endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
 118 #if __BSD_VISIBLE ||  __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500
 119 int     sigwait(const sigset_t *__restrict, int *__restrict);
 120 #endif
 121 #if __BSD_VISIBLE ||  __POSIX_VISIBLE >= 200809
 122 void    psignal(unsigned int, const char *);
 123 #endif
 124 #endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */
 125 __END_DECLS
 126
 127 #endif  /* !_USER_SIGNAL_H */