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Diffstat (limited to 'REORG.TODO/signal/signal.h')
| -rw-r--r-- | REORG.TODO/signal/signal.h | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/REORG.TODO/signal/signal.h b/REORG.TODO/signal/signal.h new file mode 100644 index 0000000000..b3114736a5 --- /dev/null +++ b/REORG.TODO/signal/signal.h @@ -0,0 +1,364 @@ +/* Copyright (C) 1991-2017 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* + * ISO C99 Standard: 7.14 Signal handling <signal.h> + */ + +#ifndef _SIGNAL_H +#define _SIGNAL_H + +#include <features.h> + +__BEGIN_DECLS + +#include <bits/types.h> +#include <bits/signum.h> + +#include <bits/types/sig_atomic_t.h> + +#if defined __USE_POSIX +#include <bits/types/sigset_t.h> +#endif + +#if defined __USE_XOPEN || defined __USE_XOPEN2K +# ifndef __pid_t_defined +typedef __pid_t pid_t; +# define __pid_t_defined +#endif +#ifdef __USE_XOPEN +# endif +# ifndef __uid_t_defined +typedef __uid_t uid_t; +# define __uid_t_defined +# endif +#endif /* Unix98 */ + +#ifdef __USE_POSIX199309 +/* We need `struct timespec' later on. */ +# include <bits/types/struct_timespec.h> +#endif + +#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED +# include <bits/types/siginfo_t.h> +# include <bits/siginfo-consts.h> +#endif + +#ifdef __USE_POSIX199309 +# include <bits/types/sigevent_t.h> +# include <bits/sigevent-consts.h> +#endif + + +/* Type of a signal handler. */ +typedef void (*__sighandler_t) (int); + +/* The X/Open definition of `signal' specifies the SVID semantic. Use + the additional function `sysv_signal' when X/Open compatibility is + requested. */ +extern __sighandler_t __sysv_signal (int __sig, __sighandler_t __handler) + __THROW; +#ifdef __USE_GNU +extern __sighandler_t sysv_signal (int __sig, __sighandler_t __handler) + __THROW; +#endif + +/* Set the handler for the signal SIG to HANDLER, returning the old + handler, or SIG_ERR on error. + By default `signal' has the BSD semantic. */ +#ifdef __USE_MISC +extern __sighandler_t signal (int __sig, __sighandler_t __handler) + __THROW; +#else +/* Make sure the used `signal' implementation is the SVID version. */ +# ifdef __REDIRECT_NTH +extern __sighandler_t __REDIRECT_NTH (signal, + (int __sig, __sighandler_t __handler), + __sysv_signal); +# else +# define signal __sysv_signal +# endif +#endif + +#if defined __USE_XOPEN && !defined __USE_XOPEN2K8 +/* The X/Open definition of `signal' conflicts with the BSD version. + So they defined another function `bsd_signal'. */ +extern __sighandler_t bsd_signal (int __sig, __sighandler_t __handler) + __THROW; +#endif + +/* 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. */ +#ifdef __USE_POSIX +extern int kill (__pid_t __pid, int __sig) __THROW; +#endif /* Use POSIX. */ + +#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED +/* 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 (__pid_t __pgrp, int __sig) __THROW; +#endif /* Use misc || X/Open Unix. */ + +/* Raise signal SIG, i.e., send SIG to yourself. */ +extern int raise (int __sig) __THROW; + +#ifdef __USE_MISC +/* SVID names for the same things. */ +extern __sighandler_t ssignal (int __sig, __sighandler_t __handler) + __THROW; +extern int gsignal (int __sig) __THROW; +#endif /* Use misc. */ + +#ifdef __USE_XOPEN2K8 +/* Print a message describing the meaning of the given signal number. */ +extern void psignal (int __sig, const char *__s); + +/* Print a message describing the meaning of the given signal information. */ +extern void psiginfo (const siginfo_t *__pinfo, const char *__s); +#endif /* POSIX 2008. */ + + + +/* The `sigpause' function in X/Open defines the argument as the + signal number. This requires redirecting to another function + because the default version in glibc uses an old BSD interface. + + This function is a cancellation point and therefore not marked with + __THROW. */ + +#ifdef __USE_XOPEN +# ifdef __GNUC__ +extern int sigpause (int __sig) __asm__ ("__xpg_sigpause"); +# else +extern int __sigpause (int __sig_or_mask, int __is_sig); +/* Remove a signal from the signal mask and suspend the process. */ +# define sigpause(sig) __sigpause ((sig), 1) +# endif +#endif + + +#ifdef __USE_MISC +/* None of the following functions should be used anymore. They are here + only for compatibility. A single word (`int') is not guaranteed to be + enough to hold a complete signal mask and therefore these functions + simply do not work in many situations. Use `sigprocmask' instead. */ + +/* Compute mask for signal SIG. */ +# define sigmask(sig) ((int)(1u << ((sig) - 1))) + +/* Block signals in MASK, returning the old mask. */ +extern int sigblock (int __mask) __THROW __attribute_deprecated__; + +/* Set the mask of blocked signals to MASK, returning the old mask. */ +extern int sigsetmask (int __mask) __THROW __attribute_deprecated__; + +/* Return currently selected signal mask. */ +extern int siggetmask (void) __THROW __attribute_deprecated__; +#endif /* Use misc. */ + + +#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_MISC +typedef __sighandler_t sig_t; +#endif + +#ifdef __USE_POSIX + +/* Clear all signals from SET. */ +extern int sigemptyset (sigset_t *__set) __THROW __nonnull ((1)); + +/* Set all signals in SET. */ +extern int sigfillset (sigset_t *__set) __THROW __nonnull ((1)); + +/* Add SIGNO to SET. */ +extern int sigaddset (sigset_t *__set, int __signo) __THROW __nonnull ((1)); + +/* Remove SIGNO from SET. */ +extern int sigdelset (sigset_t *__set, int __signo) __THROW __nonnull ((1)); + +/* Return 1 if SIGNO is in SET, 0 if not. */ +extern int sigismember (const sigset_t *__set, int __signo) + __THROW __nonnull ((1)); + +# ifdef __USE_GNU +/* Return non-empty value is SET is not empty. */ +extern int sigisemptyset (const sigset_t *__set) __THROW __nonnull ((1)); + +/* Build new signal set by combining the two inputs set using logical AND. */ +extern int sigandset (sigset_t *__set, const sigset_t *__left, + const sigset_t *__right) __THROW __nonnull ((1, 2, 3)); + +/* Build new signal set by combining the two inputs set using logical OR. */ +extern int sigorset (sigset_t *__set, const sigset_t *__left, + const sigset_t *__right) __THROW __nonnull ((1, 2, 3)); +# endif /* GNU */ + +/* Get the system-specific definitions of `struct sigaction' + and the `SA_*' and `SIG_*'. constants. */ +# include <bits/sigaction.h> + +/* Get and/or change the set of blocked signals. */ +extern int sigprocmask (int __how, const sigset_t *__restrict __set, + sigset_t *__restrict __oset) __THROW; + +/* Change the set of blocked signals to SET, + wait until a signal arrives, and restore the set of blocked signals. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern int sigsuspend (const sigset_t *__set) __nonnull ((1)); + +/* Get and/or set the action for signal SIG. */ +extern int sigaction (int __sig, const struct sigaction *__restrict __act, + struct sigaction *__restrict __oact) __THROW; + +/* Put in SET all signals that are blocked and waiting to be delivered. */ +extern int sigpending (sigset_t *__set) __THROW __nonnull ((1)); + + +/* Select any of pending signals from SET or wait for any to arrive. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern int sigwait (const sigset_t *__restrict __set, int *__restrict __sig) + __nonnull ((1, 2)); + +# ifdef __USE_POSIX199309 +/* Select any of pending signals from SET and place information in INFO. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern int sigwaitinfo (const sigset_t *__restrict __set, + siginfo_t *__restrict __info) __nonnull ((1)); + +/* Select any of pending signals from SET and place information in INFO. + Wait the time specified by TIMEOUT if no signal is pending. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern int sigtimedwait (const sigset_t *__restrict __set, + siginfo_t *__restrict __info, + const struct timespec *__restrict __timeout) + __nonnull ((1)); + +/* Send signal SIG to the process PID. Associate data in VAL with the + signal. */ +extern int sigqueue (__pid_t __pid, int __sig, const union sigval __val) + __THROW; +# endif /* Use POSIX 199306. */ + +#endif /* Use POSIX. */ + +#ifdef __USE_MISC + +/* Names of the signals. This variable exists only for compatibility. + Use `strsignal' instead (see <string.h>). */ +extern const char *const _sys_siglist[_NSIG]; +extern const char *const sys_siglist[_NSIG]; + + +/* Get machine-dependent `struct sigcontext' and signal subcodes. */ +# include <bits/sigcontext.h> + +/* Restore the state saved in SCP. */ +extern int sigreturn (struct sigcontext *__scp) __THROW; + +#endif /* Use misc. */ + + +#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 +# define __need_size_t +# include <stddef.h> + +/* 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 (int __sig, int __interrupt) __THROW; + +# include <bits/sigstack.h> +# include <bits/types/stack_t.h> +# include <bits/ss_flags.h> +# if defined __USE_XOPEN || defined __USE_XOPEN2K8 +/* This will define `ucontext_t' and `mcontext_t'. */ +# include <sys/ucontext.h> +# endif + +/* Alternate signal handler stack interface. + This interface should always be preferred over `sigstack'. */ +extern int sigaltstack (const stack_t *__restrict __ss, + stack_t *__restrict __oss) __THROW; + +#endif /* Use POSIX.1-2008 or X/Open Unix. */ + +#if ((defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \ + || defined __USE_MISC) +# include <bits/types/struct_sigstack.h> +#endif + +#if ((defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \ + || defined __USE_MISC) +/* 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. + This interface is obsolete and on many platform not implemented. */ +extern int sigstack (struct sigstack *__ss, struct sigstack *__oss) + __THROW __attribute_deprecated__; +#endif + +#ifdef __USE_XOPEN_EXTENDED +/* Simplified interface for signal management. */ + +/* Add SIG to the calling process' signal mask. */ +extern int sighold (int __sig) __THROW; + +/* Remove SIG from the calling process' signal mask. */ +extern int sigrelse (int __sig) __THROW; + +/* Set the disposition of SIG to SIG_IGN. */ +extern int sigignore (int __sig) __THROW; + +/* Set the disposition of SIG. */ +extern __sighandler_t sigset (int __sig, __sighandler_t __disp) __THROW; +#endif + +#if defined __USE_POSIX199506 || defined __USE_UNIX98 +/* Some of the functions for handling signals in threaded programs must + be defined here. */ +# include <bits/pthreadtypes.h> +# include <bits/sigthread.h> +#endif /* use Unix98 */ + +/* The following functions are used internally in the C library and in + other code which need deep insights. */ + +/* Return number of available real-time signal with highest priority. */ +extern int __libc_current_sigrtmin (void) __THROW; +/* Return number of available real-time signal with lowest priority. */ +extern int __libc_current_sigrtmax (void) __THROW; + +__END_DECLS + +#endif /* not signal.h */ |