da73f655fc
You could argue that this is hurting people smart enough to have manually allocated a large-enough sigset_t, but those people are smart enough to implement their own sigset functions too. I wonder whether our least unpleasant way out of our self-inflicted 32-bit cesspool is to have equivalents of _FILE_OFFSET_BITS such as _SIGSET_T_BITS, so calling code could opt in? You'd have to be careful passing sigset_t arguments between code compiled with different options. Bug: 5828899 Change-Id: I0ae60ee8544835b069a2b20568f38ec142e0737b
146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SIGNAL_H_
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#define _SIGNAL_H_
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#include <errno.h>
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#include <sys/cdefs.h>
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#include <limits.h> /* For LONG_BIT */
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#include <string.h> /* For memset() */
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#include <sys/types.h>
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#include <asm/signal.h>
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#define __ARCH_SI_UID_T __kernel_uid32_t
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#include <asm/siginfo.h>
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#undef __ARCH_SI_UID_T
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__BEGIN_DECLS
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typedef int sig_atomic_t;
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/* _NSIG is used by the SIGRTMAX definition under <asm/signal.h>, however
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* its definition is part of a #if __KERNEL__ .. #endif block in the original
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* kernel headers and is thus not part of our cleaned-up versions.
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*
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* Looking at the current kernel sources, it is defined as 64 for all
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* architectures except for the 'mips' one which set it to 128.
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*/
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#ifndef _NSIG
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# define _NSIG 64
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#endif
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extern const char* const sys_siglist[];
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extern const char* const sys_signame[];
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static __inline__ int sigismember(sigset_t* set, int signum) {
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if (set == NULL || signum < 1 || signum >= 8*sizeof(sigset_t)) {
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errno = EINVAL;
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return -1;
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}
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unsigned long* local_set = (unsigned long*) set;
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signum--;
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return (int) ((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1);
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}
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static __inline__ int sigaddset(sigset_t* set, int signum) {
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if (set == NULL || signum < 1 || signum >= 8*sizeof(sigset_t)) {
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errno = EINVAL;
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return -1;
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}
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unsigned long* local_set = (unsigned long*) set;
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signum--;
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local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT);
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return 0;
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}
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static __inline__ int sigdelset(sigset_t* set, int signum) {
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if (set == NULL || signum < 1 || signum >= 8*sizeof(sigset_t)) {
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errno = EINVAL;
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return -1;
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}
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unsigned long* local_set = (unsigned long*) set;
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signum--;
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local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT));
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return 0;
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}
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static __inline__ int sigemptyset(sigset_t* set) {
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if (set == NULL) {
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errno = EINVAL;
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return -1;
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}
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memset(set, 0, sizeof *set);
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return 0;
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}
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static __inline__ int sigfillset(sigset_t* set) {
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if (set == NULL) {
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errno = EINVAL;
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return -1;
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}
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memset(set, ~0, sizeof *set);
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return 0;
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}
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/* compatibility types */
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typedef void (*sig_t)(int);
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typedef sig_t sighandler_t;
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/* differentiater between sysv and bsd behaviour 8*/
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extern __sighandler_t sysv_signal(int, __sighandler_t);
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extern __sighandler_t bsd_signal(int, __sighandler_t);
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/* the default is bsd */
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static __inline__ __sighandler_t signal(int s, __sighandler_t f)
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{
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return bsd_signal(s,f);
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}
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/* the syscall itself */
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extern __sighandler_t __signal(int, __sighandler_t, int);
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extern int sigprocmask(int, const sigset_t *, sigset_t *);
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extern int sigaction(int, const struct sigaction *, struct sigaction *);
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extern int sigpending(sigset_t *);
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extern int sigsuspend(const sigset_t *);
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extern int sigwait(const sigset_t *set, int *sig);
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extern int siginterrupt(int sig, int flag);
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extern int raise(int);
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extern int kill(pid_t, int);
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extern int killpg(int pgrp, int sig);
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extern int sigaltstack(const stack_t *ss, stack_t *oss);
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extern void psiginfo(const siginfo_t* si, const char* message);
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extern void psignal(int signal_number, const char* message);
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__END_DECLS
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#endif /* _SIGNAL_H_ */
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