1 /* sys/signal.h */ 2 3 #ifndef _SYS_SIGNAL_H 4 #define _SYS_SIGNAL_H 5 #ifdef __cplusplus 6 extern "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__ 17 typedef 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 39 union sigval { 40 int sival_int; /* Integer signal value */ 41 void *sival_ptr; /* Pointer signal value */ 42 }; 43 44 struct 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 65 typedef 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 87 typedef void (*_sig_func_ptr)(int); 88 89 struct 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 */ 111 112 typedef void (*_sig_func_ptr)(int); 113 114 struct 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) 134 135 int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset)); 136 137 #if defined(_POSIX_THREADS) 138 int _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 150 int _EXFUN(_kill, (pid_t, int)); 151 #endif 152 int _EXFUN(kill, (pid_t, int)); 153 int _EXFUN(killpg, (pid_t, int)); 154 int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *)); 155 int _EXFUN(sigaddset, (sigset_t *, const int)); 156 int _EXFUN(sigdelset, (sigset_t *, const int)); 157 int _EXFUN(sigismember, (const sigset_t *, int)); 158 int _EXFUN(sigfillset, (sigset_t *)); 159 int _EXFUN(sigemptyset, (sigset_t *)); 160 int _EXFUN(sigpending, (sigset_t *)); 161 int _EXFUN(sigsuspend, (const sigset_t *)); 162 int _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 170 int _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(). */ 177 178 int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info)); 179 int _EXFUN(sigtimedwait, 180 (const sigset_t *set, siginfo_t *info, const struct timespec *timeout) 181 ); 182 int _EXFUN(sigwait, (const sigset_t *set, int *sig)); 183 184 /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ 185 int _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
