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- /* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- /*
- * ANSI Standard: 4.7 SIGNAL HANDLING <signal.h>
- */
-
- #ifndef _SIGNAL_H
-
- #if !defined(__need_sig_atomic_t) && !defined(__need_sigset_t)
- #define _SIGNAL_H 1
- #include <features.h>
- #endif
-
- __BEGIN_DECLS
-
- #define __need_size_t
- #include <stddef.h>
-
- #include <gnu/types.h>
- #include <sigset.h> /* __sigset_t, __sig_atomic_t. */
-
- #if !defined(__sig_atomic_t_defined) && \
- (defined(_SIGNAL_H) || defined(__need_sig_atomic_t))
- /* An integral type that can be modified atomically, without the
- possibility of a signal arriving in the middle of the operation. */
- typedef __sig_atomic_t sig_atomic_t;
- #endif /* `sig_atomic_t' undefined and <signal.h> or need `sig_atomic_t'. */
- #undef __need_sig_atomic_t
-
- #ifdef _SIGNAL_H
-
- #include <signum.h>
-
- /* Type of a signal handler. */
- typedef void (*__sighandler_t) __P ((int));
-
- /* Set the handler for the signal SIG to HANDLER,
- returning the old handler, or SIG_ERR on error. */
- extern __sighandler_t signal __P ((int __sig, __sighandler_t __handler));
-
- /* Send signal SIG to process number PID. If PID is zero,
- send SIG to all processes in the current process's process group.
- If PID is < -1, send SIG to all processes in process group - PID. */
- extern int __kill __P ((__pid_t __pid, int __sig));
- #ifdef __USE_POSIX
- extern int kill __P ((__pid_t __pid, int __sig));
- #endif /* Use POSIX. */
-
- #ifdef __USE_BSD
- /* Send SIG to all processes in process group PGRP.
- If PGRP is zero, send SIG to all processes in
- the current process's process group. */
- extern int killpg __P ((__pid_t __pgrp, int __sig));
- #endif /* Use BSD. */
-
- /* Raise signal SIG, i.e., send SIG to yourself. */
- extern int raise __P ((int __sig));
-
- #ifdef __USE_SVID
- /* SVID names for the same things. */
- extern __sighandler_t ssignal __P ((int __sig, __sighandler_t __handler));
- extern int gsignal __P ((int __sig));
- #endif /* Use SVID. */
-
- #ifdef __USE_MISC
- /* Print a message describing the meaning of the given signal number. */
- extern void psignal __P ((int __sig, __const char *__s));
- #endif /* Use misc. */
-
-
- /* Block signals in MASK, returning the old mask. */
- extern int __sigblock __P ((int __mask));
-
- /* Set the mask of blocked signals to MASK, returning the old mask. */
- extern int __sigsetmask __P ((int __mask));
-
- /* Set the mask of blocked signals to MASK,
- wait for a signal to arrive, and then restore the mask. */
- extern int __sigpause __P ((int __mask));
-
- #ifdef __USE_BSD
- #define sigmask(sig) __sigmask(sig)
-
- extern int sigblock __P ((int __mask));
- extern int sigsetmask __P ((int __mask));
- extern int sigpause __P ((int __mask));
- #endif /* Use BSD. */
-
-
- #ifdef __USE_MISC
- #define NSIG _NSIG
- #endif
-
- #ifdef __USE_GNU
- typedef __sighandler_t sighandler_t;
- #endif
-
- #endif /* <signal.h> included. */
-
-
- #ifdef __USE_POSIX
-
- #if !defined(__sigset_t_defined) && \
- (defined(_SIGNAL_H) || defined(__need_sigset_t))
- typedef __sigset_t sigset_t;
- #define __sigset_t_defined 1
- #endif /* `sigset_t' not defined and <signal.h> or need `sigset_t'. */
- #undef __need_sigset_t
-
- #ifdef _SIGNAL_H
-
- /* Clear all signals from SET. */
- extern int sigemptyset __P ((sigset_t *__set));
-
- /* Set all signals in SET. */
- extern int sigfillset __P ((sigset_t *__set));
-
- /* Add SIGNO to SET. */
- extern int sigaddset __P ((sigset_t *__set, int __signo));
-
- /* Remove SIGNO from SET. */
- extern int sigdelset __P ((sigset_t *__set, int __signo));
-
- /* Return 1 if SIGNO is in SET, 0 if not. */
- extern int sigismember __P ((__const sigset_t *__set, int signo));
-
- #ifdef __OPTIMIZE__
- /* <sigset.h> defines the __ versions as macros that do the work. */
- #define sigemptyset(set) __sigemptyset(set)
- #define sigfillset(set) __sigfillset(set)
- #define sigaddset(set, signo) __sigaddset(set, signo)
- #define sigdelset(set, signo) __sigdelset(set, signo)
- #define sigismember(set, signo) __sigismember(set, signo)
- #endif
-
- /* Get the system-specific definitions of `struct sigaction'
- and the `SA_*' and `SIG_*'. constants. */
- #include <sigaction.h>
-
- /* Get and/or change the set of blocked signals. */
- extern int __sigprocmask __P ((int __how,
- __const sigset_t *__set, sigset_t *__oset));
- extern int sigprocmask __P ((int __how,
- __const sigset_t *__set, sigset_t *__oset));
-
- /* Change the set of blocked signals to SET,
- wait until a signal arrives, and restore the set of blocked signals. */
- extern int sigsuspend __P ((__const sigset_t *__set));
-
- /* Get and/or set the action for signal SIG. */
- extern int __sigaction __P ((int __sig, __const struct sigaction *__act,
- struct sigaction *__oact));
- extern int sigaction __P ((int __sig, __const struct sigaction *__act,
- struct sigaction *__oact));
-
- /* Put in SET all signals that are blocked and waiting to be delivered. */
- extern int sigpending __P ((sigset_t *__set));
-
- #endif /* <signal.h> included. */
-
- #endif /* Use POSIX. */
-
- #if defined(_SIGNAL_H) && defined(__USE_BSD)
-
- /* Structure passed to `sigvec'. */
- struct sigvec
- {
- __sighandler_t sv_handler; /* Signal handler. */
- int sv_mask; /* Mask of signals to be blocked. */
-
- int sv_flags; /* Flags (see below). */
- #define sv_onstack sv_flags /* 4.2 BSD compatibility. */
- };
-
- /* Bits in `sv_flags'. */
- #define SV_ONSTACK (1 << 0)/* Take the signal on the signal stack. */
- #define SV_INTERRUPT (1 << 1)/* Do not restart system calls. */
- #define SV_RESETHAND (1 << 2)/* Reset handler to SIG_DFL on receipt. */
-
-
- /* If VEC is non-NULL, set the handler for SIG to the `sv_handler' member
- of VEC. The signals in `sv_mask' will be blocked while the handler runs.
- If the SV_RESETHAND bit is set in `sv_flags', the handler for SIG will be
- reset to SIG_DFL before `sv_handler' is entered. If OVEC is non-NULL,
- it is filled in with the old information for SIG. */
- extern int __sigvec __P ((int __sig, __const struct sigvec *__vec,
- struct sigvec *__ovec));
- extern int sigvec __P ((int __sig, __const struct sigvec *__vec,
- struct sigvec *__ovec));
-
-
- /* If INTERRUPT is nonzero, make signal SIG interrupt system calls
- (causing them to fail with EINTR); if INTERRUPT is zero, make system
- calls be restarted after signal SIG. */
- extern int siginterrupt __P ((int __sig, int __interrupt));
-
-
- /* Structure describing a signal stack. */
- struct sigstack
- {
- __ptr_t ss_sp; /* Signal stack pointer. */
- int ss_onstack; /* Nonzero if executing on this stack. */
- };
-
- /* Run signals handlers on the stack specified by SS (if not NULL).
- If OSS is not NULL, it is filled in with the old signal stack status. */
- extern int sigstack __P ((__const struct sigstack *__ss,
- struct sigstack *__oss));
-
- /* Alternate interface. */
- struct sigaltstack
- {
- __ptr_t ss_sp;
- size_t ss_size;
- int ss_flags;
- };
-
- extern int sigaltstack __P ((__const struct sigaltstack *__ss,
- struct sigaltstack *__oss));
-
- /* Get machine-dependent `struct sigcontext' and signal subcodes. */
- #include <sigcontext.h>
-
- /* Restore the state saved in SCP. */
- extern int __sigreturn __P ((struct sigcontext *__scp));
- extern int sigreturn __P ((struct sigcontext *__scp));
-
- #endif /* signal.h included and use BSD. */
-
- __END_DECLS
-
- #endif /* signal.h */
-