| /* Copyright (C) 1991, 1992, 1993, 1994, 1995 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 |
| |
| /* 4.4 BSD uses the name `sig_t' for this. */ |
| #ifdef __USE_BSD |
| typedef __sighandler_t sig_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) |
| |
| /* Names of the signals. This variable exists only for compatiblity. |
| Use `strsignal' instead (see <string.h>). */ |
| extern __const char *__const _sys_siglist[NSIG]; |
| extern __const char *__const sys_siglist[NSIG]; |
| |
| /* 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 */ |