1/* sys/signal.h */ 2 3#ifndef _SYS_SIGNAL_H 4#define _SYS_SIGNAL_H 5#ifdef __cplusplus 6extern "C" { 7#endif 8 9#include "_ansi.h" 10#include <sys/features.h> 11#include <sys/types.h> 12 13/* #ifndef __STRICT_ANSI__*/ 14 15/* Cygwin defines it's own sigset_t in include/cygwin/signal.h */ 16#ifndef __CYGWIN__ 17typedef unsigned long sigset_t; 18#endif 19 20#if defined(__rtems__) || defined (__native_client__) 21 22#if defined(_POSIX_REALTIME_SIGNALS) 23 24/* sigev_notify values 25 NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */ 26 27#define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */ 28 /* when the event of interest occurs. */ 29#define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */ 30 /* value, shall be delivered when the event of */ 31 /* interest occurs. */ 32#define SIGEV_THREAD 3 /* A notification function shall be called to */ 33 /* perform notification. */ 34 35/* Signal Generation and Delivery, P1003.1b-1993, p. 63 36 NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and 37 sigev_notify_attributes to the sigevent structure. */ 38 39union sigval { 40 int sival_int; /* Integer signal value */ 41 void *sival_ptr; /* Pointer signal value */ 42}; 43 44struct sigevent { 45 int sigev_notify; /* Notification type */ 46 int sigev_signo; /* Signal number */ 47 union sigval sigev_value; /* Signal value */ 48 49#if defined(_POSIX_THREADS) 50 void (*sigev_notify_function)( union sigval ); 51 /* Notification function */ 52 pthread_attr_t *sigev_notify_attributes; /* Notification Attributes */ 53#endif 54}; 55 56/* Signal Actions, P1003.1b-1993, p. 64 */ 57/* si_code values, p. 66 */ 58 59#define SI_USER 1 /* Sent by a user. kill(), abort(), etc */ 60#define SI_QUEUE 2 /* Sent by sigqueue() */ 61#define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */ 62#define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */ 63#define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */ 64 65typedef struct { 66 int si_signo; /* Signal number */ 67 int si_code; /* Cause of the signal */ 68 union sigval si_value; /* Signal value */ 69} siginfo_t; 70#endif 71 72/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */ 73 74#define SA_NOCLDSTOP 1 /* Do not generate SIGCHLD when children stop */ 75#define SA_SIGINFO 2 /* Invoke the signal catching function with */ 76 /* three arguments instead of one. */ 77 78/* struct sigaction notes from POSIX: 79 * 80 * (1) Routines stored in sa_handler should take a single int as 81 * their argument although the POSIX standard does not require this. 82 * This is not longer true since at least POSIX.1-2008 83 * (2) The fields sa_handler and sa_sigaction may overlap, and a conforming 84 * application should not use both simultaneously. 85 */ 86 87typedef void (*_sig_func_ptr)(int); 88 89struct sigaction { 90 int sa_flags; /* Special flags to affect behavior of signal */ 91 sigset_t sa_mask; /* Additional set of signals to be blocked */ 92 /* during execution of signal-catching */ 93 /* function. */ 94 union { 95 _sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */ 96#if defined(_POSIX_REALTIME_SIGNALS) 97 void (*_sigaction)( int, siginfo_t *, void * ); 98#endif 99 } _signal_handlers; 100}; 101 102#define sa_handler _signal_handlers._handler 103#if defined(_POSIX_REALTIME_SIGNALS) 104#define sa_sigaction _signal_handlers._sigaction 105#endif 106 107#elif defined(__CYGWIN__) 108#include <cygwin/signal.h> 109#else 110#define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */ 111 112typedef void (*_sig_func_ptr)(int); 113 114struct sigaction 115{ 116 _sig_func_ptr sa_handler; 117 sigset_t sa_mask; 118 int sa_flags; 119}; 120#endif /* defined(__rtems__) || defined(__native_client__) */ 121 122#define SIG_SETMASK 0 /* set mask with sigprocmask() */ 123#define SIG_BLOCK 1 /* set of signals to block */ 124#define SIG_UNBLOCK 2 /* set of signals to, well, unblock */ 125 126/* These depend upon the type of sigset_t, which right now 127 is always a long.. They're in the POSIX namespace, but 128 are not ANSI. */ 129#define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0) 130#define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0) 131#define sigemptyset(what) (*(what) = 0, 0) 132#define sigfillset(what) (*(what) = ~(0), 0) 133#define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0) 134 135int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset)); 136 137#if defined(_POSIX_THREADS) 138int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset)); 139#endif 140 141/* protos for functions found in winsup sources for CYGWIN */ 142#if defined(__CYGWIN__) || defined(__rtems__) || defined(__native_client__) 143#undef sigaddset 144#undef sigdelset 145#undef sigemptyset 146#undef sigfillset 147#undef sigismember 148 149#ifdef _COMPILING_NEWLIB 150int _EXFUN(_kill, (pid_t, int)); 151#endif 152int _EXFUN(kill, (pid_t, int)); 153int _EXFUN(killpg, (pid_t, int)); 154int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *)); 155int _EXFUN(sigaddset, (sigset_t *, const int)); 156int _EXFUN(sigdelset, (sigset_t *, const int)); 157int _EXFUN(sigismember, (const sigset_t *, int)); 158int _EXFUN(sigfillset, (sigset_t *)); 159int _EXFUN(sigemptyset, (sigset_t *)); 160int _EXFUN(sigpending, (sigset_t *)); 161int _EXFUN(sigsuspend, (const sigset_t *)); 162int _EXFUN(sigpause, (int)); 163 164#if defined(_POSIX_THREADS) && !defined(__native_client__) 165#ifdef __CYGWIN__ 166# ifndef _CYGWIN_TYPES_H 167# error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib. 168# endif 169#endif 170int _EXFUN(pthread_kill, (pthread_t thread, int sig)); 171#endif 172 173#if defined(_POSIX_REALTIME_SIGNALS) 174 175/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 176 NOTE: P1003.1c/D10, p. 39 adds sigwait(). */ 177 178int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info)); 179int _EXFUN(sigtimedwait, 180 (const sigset_t *set, siginfo_t *info, const struct timespec *timeout) 181); 182int _EXFUN(sigwait, (const sigset_t *set, int *sig)); 183 184/* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ 185int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value)); 186 187#endif /* defined(_POSIX_REALTIME_SIGNALS) */ 188 189#endif /* defined(__CYGWIN__) || defined(__rtems__) */ 190 191/* #endif __STRICT_ANSI__ */ 192 193#if defined(___AM29K__) 194/* These all need to be defined for ANSI C, but I don't think they are 195 meaningful. */ 196#define SIGABRT 1 197#define SIGFPE 1 198#define SIGILL 1 199#define SIGINT 1 200#define SIGSEGV 1 201#define SIGTERM 1 202/* These need to be defined for POSIX, and some others do too. */ 203#define SIGHUP 1 204#define SIGQUIT 1 205#define NSIG 2 206#elif defined(__GO32__) 207#define SIGINT 1 208#define SIGKILL 2 209#define SIGPIPE 3 210#define SIGFPE 4 211#define SIGHUP 5 212#define SIGTERM 6 213#define SIGSEGV 7 214#define SIGTSTP 8 215#define SIGQUIT 9 216#define SIGTRAP 10 217#define SIGILL 11 218#define SIGEMT 12 219#define SIGALRM 13 220#define SIGBUS 14 221#define SIGLOST 15 222#define SIGSTOP 16 223#define SIGABRT 17 224#define SIGUSR1 18 225#define SIGUSR2 19 226#define NSIG 20 227#elif !defined(SIGTRAP) 228#define SIGHUP 1 /* hangup */ 229#define SIGINT 2 /* interrupt */ 230#define SIGQUIT 3 /* quit */ 231#define SIGILL 4 /* illegal instruction (not reset when caught) */ 232#define SIGTRAP 5 /* trace trap (not reset when caught) */ 233#define SIGIOT 6 /* IOT instruction */ 234#define SIGABRT 6 /* used by abort, replace SIGIOT in the future */ 235#define SIGEMT 7 /* EMT instruction */ 236#define SIGFPE 8 /* floating point exception */ 237#define SIGKILL 9 /* kill (cannot be caught or ignored) */ 238#define SIGBUS 10 /* bus error */ 239#define SIGSEGV 11 /* segmentation violation */ 240#define SIGSYS 12 /* bad argument to system call */ 241#define SIGPIPE 13 /* write on a pipe with no one to read it */ 242#define SIGALRM 14 /* alarm clock */ 243#define SIGTERM 15 /* software termination signal from kill */ 244 245#if defined(__rtems__) 246#define SIGURG 16 /* urgent condition on IO channel */ 247#define SIGSTOP 17 /* sendable stop signal not from tty */ 248#define SIGTSTP 18 /* stop signal from tty */ 249#define SIGCONT 19 /* continue a stopped process */ 250#define SIGCHLD 20 /* to parent on child stop or exit */ 251#define SIGCLD 20 /* System V name for SIGCHLD */ 252#define SIGTTIN 21 /* to readers pgrp upon background tty read */ 253#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 254#define SIGIO 23 /* input/output possible signal */ 255#define SIGPOLL SIGIO /* System V name for SIGIO */ 256#define SIGWINCH 24 /* window changed */ 257#define SIGUSR1 25 /* user defined signal 1 */ 258#define SIGUSR2 26 /* user defined signal 2 */ 259 260/* Real-Time Signals Range, P1003.1b-1993, p. 61 261 NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX 262 (which is a minimum of 8) signals. 263 */ 264#define SIGRTMIN 27 265#define SIGRTMAX 31 266#define __SIGFIRSTNOTRT SIGHUP 267#define __SIGLASTNOTRT SIGUSR2 268 269#define NSIG 32 /* signal 0 implied */ 270 271#elif defined(__svr4__) 272/* svr4 specifics. different signals above 15, and sigaction. */ 273#define SIGUSR1 16 274#define SIGUSR2 17 275#define SIGCLD 18 276#define SIGPWR 19 277#define SIGWINCH 20 278#define SIGPOLL 22 /* 20 for x.out binaries!!!! */ 279#define SIGSTOP 23 /* sendable stop signal not from tty */ 280#define SIGTSTP 24 /* stop signal from tty */ 281#define SIGCONT 25 /* continue a stopped process */ 282#define SIGTTIN 26 /* to readers pgrp upon background tty read */ 283#define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */ 284#define NSIG 28 285#else 286#define SIGURG 16 /* urgent condition on IO channel */ 287#define SIGSTOP 17 /* sendable stop signal not from tty */ 288#define SIGTSTP 18 /* stop signal from tty */ 289#define SIGCONT 19 /* continue a stopped process */ 290#define SIGCHLD 20 /* to parent on child stop or exit */ 291#define SIGCLD 20 /* System V name for SIGCHLD */ 292#define SIGTTIN 21 /* to readers pgrp upon background tty read */ 293#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 294#define SIGIO 23 /* input/output possible signal */ 295#define SIGPOLL SIGIO /* System V name for SIGIO */ 296#define SIGXCPU 24 /* exceeded CPU time limit */ 297#define SIGXFSZ 25 /* exceeded file size limit */ 298#define SIGVTALRM 26 /* virtual time alarm */ 299#define SIGPROF 27 /* profiling time alarm */ 300#define SIGWINCH 28 /* window changed */ 301#define SIGLOST 29 /* resource lost (eg, record-lock lost) */ 302#define SIGUSR1 30 /* user defined signal 1 */ 303#define SIGUSR2 31 /* user defined signal 2 */ 304#define NSIG 32 /* signal 0 implied */ 305#endif 306#endif 307 308#ifdef __cplusplus 309} 310#endif 311 312#ifndef _SIGNAL_H_ 313/* Some applications take advantage of the fact that <sys/signal.h> 314 * and <signal.h> are equivalent in glibc. Allow for that here. */ 315#include <signal.h> 316#endif 317#endif /* _SYS_SIGNAL_H */ 318