1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _SIGNAL_H_ 30 #define _SIGNAL_H_ 31 32 #include <errno.h> 33 #include <sys/cdefs.h> 34 #include <limits.h> /* For LONG_BIT */ 35 #include <string.h> /* For memset() */ 36 #include <sys/types.h> 37 #include <asm/sigcontext.h> 38 39 #if defined(__LP64__) || defined(__mips__) 40 /* For 64-bit (and mips), the kernel's struct sigaction doesn't match the POSIX one, 41 * so we need to expose our own and translate behind the scenes. */ 42 # define sigaction __kernel_sigaction 43 # include <linux/signal.h> 44 # undef sigaction 45 #else 46 /* For 32-bit, we're stuck with the definitions we already shipped, 47 * even though they contain a sigset_t that's too small. */ 48 # include <linux/signal.h> 49 #endif 50 51 __BEGIN_DECLS 52 53 typedef int sig_atomic_t; 54 55 /* The arm and x86 kernel header files don't define _NSIG. */ 56 #ifndef _KERNEL__NSIG 57 #define _KERNEL__NSIG 64 58 #endif 59 60 /* Userspace's NSIG is the kernel's _NSIG + 1. */ 61 #define _NSIG (_KERNEL__NSIG + 1) 62 #define NSIG _NSIG 63 64 /* We take a few real-time signals for ourselves. May as well use the same names as glibc. */ 65 #define SIGRTMIN (__libc_current_sigrtmin()) 66 #define SIGRTMAX (__libc_current_sigrtmax()) 67 extern int __libc_current_sigrtmin(void); 68 extern int __libc_current_sigrtmax(void); 69 70 extern const char* const sys_siglist[]; 71 extern const char* const sys_signame[]; /* BSD compatibility. */ 72 73 typedef __sighandler_t sig_t; /* BSD compatibility. */ 74 typedef __sighandler_t sighandler_t; /* glibc compatibility. */ 75 76 #define si_timerid si_tid /* glibc compatibility. */ 77 78 #if defined(__LP64__) 79 80 struct sigaction { 81 unsigned int sa_flags; 82 union { 83 sighandler_t sa_handler; 84 void (*sa_sigaction)(int, struct siginfo*, void*); 85 }; 86 sigset_t sa_mask; 87 void (*sa_restorer)(void); 88 }; 89 90 #elif defined(__mips__) 91 92 struct sigaction { 93 unsigned int sa_flags; 94 union { 95 sighandler_t sa_handler; 96 void (*sa_sigaction) (int, struct siginfo*, void*); 97 }; 98 sigset_t sa_mask; 99 }; 100 101 #endif 102 103 extern int sigaction(int, const struct sigaction*, struct sigaction*); 104 105 extern sighandler_t signal(int, sighandler_t); 106 107 extern int siginterrupt(int, int); 108 109 extern int sigaddset(sigset_t*, int); 110 extern int sigdelset(sigset_t*, int); 111 extern int sigemptyset(sigset_t*); 112 extern int sigfillset(sigset_t*); 113 extern int sigismember(const sigset_t*, int); 114 115 extern int sigpending(sigset_t*) __nonnull((1)); 116 extern int sigprocmask(int, const sigset_t*, sigset_t*); 117 extern int sigsuspend(const sigset_t*) __nonnull((1)); 118 extern int sigwait(const sigset_t*, int*) __nonnull((1, 2)); 119 120 extern int raise(int); 121 extern int kill(pid_t, int); 122 extern int killpg(int, int); 123 124 extern int sigaltstack(const stack_t*, stack_t*); 125 126 extern void psiginfo(const siginfo_t*, const char*); 127 extern void psignal(int, const char*); 128 129 __END_DECLS 130 131 #endif /* _SIGNAL_H_ */ 132