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 #ifndef _SIGNAL_H_ 29 #define _SIGNAL_H_ 30 31 #include <errno.h> 32 #include <sys/cdefs.h> 33 #include <limits.h> /* For LONG_BIT */ 34 #include <string.h> /* For memset() */ 35 #include <sys/types.h> 36 #include <asm/signal.h> 37 38 #define __ARCH_SI_UID_T __kernel_uid32_t 39 #include <asm/siginfo.h> 40 #undef __ARCH_SI_UID_T 41 42 __BEGIN_DECLS 43 44 typedef int sig_atomic_t; 45 46 /* _NSIG is used by the SIGRTMAX definition under <asm/signal.h>, however 47 * its definition is part of a #if __KERNEL__ .. #endif block in the original 48 * kernel headers and is thus not part of our cleaned-up versions. 49 * 50 * Looking at the current kernel sources, it is defined as 64 for all 51 * architectures except for the 'mips' one which set it to 128. 52 */ 53 #ifndef _NSIG 54 # define _NSIG 64 55 #endif 56 57 extern const char* const sys_siglist[]; 58 extern const char* const sys_signame[]; 59 sigismember(const sigset_t * set,int signum)60 static __inline__ int sigismember(const sigset_t* set, int signum) { 61 int bit = signum - 1; // Signal numbers start at 1, but bit positions start at 0. 62 if (set == NULL || bit < 0 || bit >= (int) (8*sizeof(sigset_t))) { 63 errno = EINVAL; 64 return -1; 65 } 66 const unsigned long* local_set = (const unsigned long*) set; 67 return (int) ((local_set[bit / LONG_BIT] >> (bit % LONG_BIT)) & 1); 68 } 69 sigaddset(sigset_t * set,int signum)70 static __inline__ int sigaddset(sigset_t* set, int signum) { 71 int bit = signum - 1; // Signal numbers start at 1, but bit positions start at 0. 72 if (set == NULL || bit < 0 || bit >= (int) (8*sizeof(sigset_t))) { 73 errno = EINVAL; 74 return -1; 75 } 76 unsigned long* local_set = (unsigned long*) set; 77 local_set[bit / LONG_BIT] |= 1UL << (bit % LONG_BIT); 78 return 0; 79 } 80 sigdelset(sigset_t * set,int signum)81 static __inline__ int sigdelset(sigset_t* set, int signum) { 82 int bit = signum - 1; // Signal numbers start at 1, but bit positions start at 0. 83 if (set == NULL || bit < 0 || bit >= (int) (8*sizeof(sigset_t))) { 84 errno = EINVAL; 85 return -1; 86 } 87 unsigned long* local_set = (unsigned long*) set; 88 local_set[bit / LONG_BIT] &= ~(1UL << (bit % LONG_BIT)); 89 return 0; 90 } 91 sigemptyset(sigset_t * set)92 static __inline__ int sigemptyset(sigset_t* set) { 93 if (set == NULL) { 94 errno = EINVAL; 95 return -1; 96 } 97 memset(set, 0, sizeof *set); 98 return 0; 99 } 100 sigfillset(sigset_t * set)101 static __inline__ int sigfillset(sigset_t* set) { 102 if (set == NULL) { 103 errno = EINVAL; 104 return -1; 105 } 106 memset(set, ~0, sizeof *set); 107 return 0; 108 } 109 110 111 /* compatibility types */ 112 typedef void (*sig_t)(int); 113 typedef sig_t sighandler_t; 114 115 /* differentiater between sysv and bsd behaviour 8*/ 116 extern __sighandler_t sysv_signal(int, __sighandler_t); 117 extern __sighandler_t bsd_signal(int, __sighandler_t); 118 119 /* the default is bsd */ signal(int s,__sighandler_t f)120 static __inline__ __sighandler_t signal(int s, __sighandler_t f) 121 { 122 return bsd_signal(s,f); 123 } 124 125 /* the syscall itself */ 126 extern __sighandler_t __signal(int, __sighandler_t, int); 127 128 extern int sigprocmask(int, const sigset_t *, sigset_t *); 129 extern int sigaction(int, const struct sigaction *, struct sigaction *); 130 131 extern int sigpending(sigset_t *); 132 extern int sigsuspend(const sigset_t *); 133 extern int sigwait(const sigset_t *set, int *sig); 134 extern int siginterrupt(int sig, int flag); 135 136 extern int raise(int); 137 extern int kill(pid_t, int); 138 extern int killpg(int pgrp, int sig); 139 extern int sigaltstack(const stack_t *ss, stack_t *oss); 140 141 extern void psiginfo(const siginfo_t* si, const char* message); 142 extern void psignal(int signal_number, const char* message); 143 144 __END_DECLS 145 146 #endif /* _SIGNAL_H_ */ 147