newlib/libc/include/sys/signal.h

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