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 12 /* #ifndef __STRICT_ANSI__*/ 13 14 #if defined(_POSIX_THREADS) 15 #include <sys/types.h> /* for pthread data types */ 16 #endif 17 18 typedef unsigned long sigset_t; 19 20 #if defined(__rtems__) 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 * (2) The fields sa_handler and sa_sigaction may overlap, and a conforming 83 * application should not use both simultaneously. 84 */ 85 86 typedef void (*_sig_func_ptr)(); 87 88 struct sigaction { 89 int sa_flags; /* Special flags to affect behavior of signal */ 90 sigset_t sa_mask; /* Additional set of signals to be blocked */ 91 /* during execution of signal-catching */ 92 /* function. */ 93 union { 94 _sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */ 95 #if defined(_POSIX_REALTIME_SIGNALS) 96 void (*_sigaction)( int, siginfo_t *, void * ); 97 #endif 98 } _signal_handlers; 99 }; 100 101 #define sa_handler _signal_handlers._handler 102 #if defined(_POSIX_REALTIME_SIGNALS) 103 #define sa_sigaction _signal_handlers._sigaction 104 #endif 105 106 #elif defined(__CYGWIN__) 107 #include <cygwin/signal.h> 108 #else 109 #define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */ 110 111 typedef void (*_sig_func_ptr)(int); 112 113 struct sigaction 114 { 115 _sig_func_ptr sa_handler; 116 sigset_t sa_mask; 117 int sa_flags; 118 }; 119 #endif /* defined(__rtems__) */ 120 121 #define SIG_SETMASK 0 /* set mask with sigprocmask() */ 122 #define SIG_BLOCK 1 /* set of signals to block */ 123 #define SIG_UNBLOCK 2 /* set of signals to, well, unblock */ 124 125 /* These depend upon the type of sigset_t, which right now 126 is always a long.. They're in the POSIX namespace, but 127 are not ANSI. */ 128 #define sigaddset(what,sig) (*(what) |= (1<<(sig))) 129 #define sigemptyset(what) (*(what) = 0) 130 131 int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset)); 132 133 #if defined(_POSIX_THREADS) 134 int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset)); 135 #endif 136 137 /* protos for functions found in winsup sources for CYGWIN */ 138 #if defined(__CYGWIN__) || defined(__rtems__) 139 #undef sigaddset 140 #undef sigemptyset 141 /* The first argument to kill should be pid_t. Right now 142 <sys/types.h> always defines pid_t to be int. If that ever 143 changes, then we will need to do something else, perhaps along the 144 lines of <machine/types.h>. */ 145 int _EXFUN(kill, (int, int)); 146 int _EXFUN(killpg, (pid_t, int)); 147 int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *)); 148 int _EXFUN(sigaddset, (sigset_t *, const int)); 149 int _EXFUN(sigdelset, (sigset_t *, const int)); 150 int _EXFUN(sigismember, (const sigset_t *, int)); 151 int _EXFUN(sigfillset, (sigset_t *)); 152 int _EXFUN(sigemptyset, (sigset_t *)); 153 int _EXFUN(sigpending, (sigset_t *)); 154 int _EXFUN(sigsuspend, (const sigset_t *)); 155 int _EXFUN(sigpause, (int)); 156 157 #if defined(_POSIX_THREADS) 158 #ifdef __CYGWIN__ 159 # ifndef _CYGWIN_TYPES_H 160 # error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib. 161 # endif 162 #endif 163 int _EXFUN(pthread_kill, (pthread_t thread, int sig)); 164 #endif 165 166 #if defined(_POSIX_REALTIME_SIGNALS) 167 168 /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 169 NOTE: P1003.1c/D10, p. 39 adds sigwait(). */ 170 171 int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info)); 172 int _EXFUN(sigtimedwait, 173 (const sigset_t *set, siginfo_t *info, const struct timespec *timeout) 174 ); 175 int _EXFUN(sigwait, (const sigset_t *set, int *sig)); 176 177 /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ 178 int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value)); 179 180 #endif /* defined(_POSIX_REALTIME_SIGNALS) */ 181 182 #endif /* defined(__CYGWIN__) || defined(__rtems__) */ 183 184 /* #endif __STRICT_ANSI__ */ 185 186 #if defined(___AM29K__) 187 /* These all need to be defined for ANSI C, but I don't think they are 188 meaningful. */ 189 #define SIGABRT 1 190 #define SIGFPE 1 191 #define SIGILL 1 192 #define SIGINT 1 193 #define SIGSEGV 1 194 #define SIGTERM 1 195 /* These need to be defined for POSIX, and some others do too. */ 196 #define SIGHUP 1 197 #define SIGQUIT 1 198 #define NSIG 2 199 #elif defined(__GO32__) 200 #define SIGINT 1 201 #define SIGKILL 2 202 #define SIGPIPE 3 203 #define SIGFPE 4 204 #define SIGHUP 5 205 #define SIGTERM 6 206 #define SIGSEGV 7 207 #define SIGTSTP 8 208 #define SIGQUIT 9 209 #define SIGTRAP 10 210 #define SIGILL 11 211 #define SIGEMT 12 212 #define SIGALRM 13 213 #define SIGBUS 14 214 #define SIGLOST 15 215 #define SIGSTOP 16 216 #define SIGABRT 17 217 #define SIGUSR1 18 218 #define SIGUSR2 19 219 #define NSIG 20 220 #elif !defined(SIGTRAP) 221 #define SIGHUP 1 /* hangup */ 222 #define SIGINT 2 /* interrupt */ 223 #define SIGQUIT 3 /* quit */ 224 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 225 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 226 #define SIGIOT 6 /* IOT instruction */ 227 #define SIGABRT 6 /* used by abort, replace SIGIOT in the future */ 228 #define SIGEMT 7 /* EMT instruction */ 229 #define SIGFPE 8 /* floating point exception */ 230 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 231 #define SIGBUS 10 /* bus error */ 232 #define SIGSEGV 11 /* segmentation violation */ 233 #define SIGSYS 12 /* bad argument to system call */ 234 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 235 #define SIGALRM 14 /* alarm clock */ 236 #define SIGTERM 15 /* software termination signal from kill */ 237 238 #if defined(__rtems__) 239 #define SIGURG 16 /* urgent condition on IO channel */ 240 #define SIGSTOP 17 /* sendable stop signal not from tty */ 241 #define SIGTSTP 18 /* stop signal from tty */ 242 #define SIGCONT 19 /* continue a stopped process */ 243 #define SIGCHLD 20 /* to parent on child stop or exit */ 244 #define SIGCLD 20 /* System V name for SIGCHLD */ 245 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 246 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 247 #define SIGIO 23 /* input/output possible signal */ 248 #define SIGPOLL SIGIO /* System V name for SIGIO */ 249 #define SIGWINCH 24 /* window changed */ 250 #define SIGUSR1 25 /* user defined signal 1 */ 251 #define SIGUSR2 26 /* user defined signal 2 */ 252 253 /* Real-Time Signals Range, P1003.1b-1993, p. 61 254 NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX 255 (which is a minimum of 8) signals. 256 */ 257 #define SIGRTMIN 27 258 #define SIGRTMAX 31 259 #define __SIGFIRSTNOTRT SIGHUP 260 #define __SIGLASTNOTRT SIGUSR2 261 262 #define NSIG 32 /* signal 0 implied */ 263 264 #elif defined(__svr4__) 265 /* svr4 specifics. different signals above 15, and sigaction. */ 266 #define SIGUSR1 16 267 #define SIGUSR2 17 268 #define SIGCLD 18 269 #define SIGPWR 19 270 #define SIGWINCH 20 271 #define SIGPOLL 22 /* 20 for x.out binaries!!!! */ 272 #define SIGSTOP 23 /* sendable stop signal not from tty */ 273 #define SIGTSTP 24 /* stop signal from tty */ 274 #define SIGCONT 25 /* continue a stopped process */ 275 #define SIGTTIN 26 /* to readers pgrp upon background tty read */ 276 #define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */ 277 #define NSIG 28 278 #else 279 #define SIGURG 16 /* urgent condition on IO channel */ 280 #define SIGSTOP 17 /* sendable stop signal not from tty */ 281 #define SIGTSTP 18 /* stop signal from tty */ 282 #define SIGCONT 19 /* continue a stopped process */ 283 #define SIGCHLD 20 /* to parent on child stop or exit */ 284 #define SIGCLD 20 /* System V name for SIGCHLD */ 285 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 286 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 287 #define SIGIO 23 /* input/output possible signal */ 288 #define SIGPOLL SIGIO /* System V name for SIGIO */ 289 #define SIGXCPU 24 /* exceeded CPU time limit */ 290 #define SIGXFSZ 25 /* exceeded file size limit */ 291 #define SIGVTALRM 26 /* virtual time alarm */ 292 #define SIGPROF 27 /* profiling time alarm */ 293 #define SIGWINCH 28 /* window changed */ 294 #define SIGLOST 29 /* resource lost (eg, record-lock lost) */ 295 #define SIGUSR1 30 /* user defined signal 1 */ 296 #define SIGUSR2 31 /* user defined signal 2 */ 297 #define NSIG 32 /* signal 0 implied */ 298 #endif 299 #endif 300 301 #ifdef __cplusplus 302 } 303 #endif 304 305 #ifndef _SIGNAL_H_ 306 /* Some applications take advantage of the fact that <sys/signal.h> 307 * and <signal.h> are equivalent in glibc. Allow for that here. */ 308 #include <signal.h> 309 #endif 310 #endif /* _SYS_SIGNAL_H */ 311