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  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/cdefs.h>
  11. #include <sys/features.h>
  12. #include <sys/types.h>
  13. #include <sys/_sigset.h>
  14. #include <sys/_timespec.h>
  15.  
  16. /* #ifndef __STRICT_ANSI__*/
  17.  
  18. #if !defined(_SIGSET_T_DECLARED)
  19. #define _SIGSET_T_DECLARED
  20. typedef __sigset_t      sigset_t;
  21. #endif
  22.  
  23. #if defined(__rtems__)
  24.  
  25. #if defined(_POSIX_REALTIME_SIGNALS)
  26.  
  27. /* sigev_notify values
  28.    NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD.  */
  29.  
  30. #define SIGEV_NONE   1  /* No asynchronous notification shall be delivered */
  31.                         /*   when the event of interest occurs. */
  32. #define SIGEV_SIGNAL 2  /* A queued signal, with an application defined */
  33.                         /*  value, shall be delivered when the event of */
  34.                         /*  interest occurs. */
  35. #define SIGEV_THREAD 3  /* A notification function shall be called to */
  36.                         /*   perform notification. */
  37.  
  38. /*  Signal Generation and Delivery, P1003.1b-1993, p. 63
  39.     NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
  40.           sigev_notify_attributes to the sigevent structure.  */
  41.  
  42. union sigval {
  43.   int    sival_int;    /* Integer signal value */
  44.   void  *sival_ptr;    /* Pointer signal value */
  45. };
  46.  
  47. struct sigevent {
  48.   int              sigev_notify;               /* Notification type */
  49.   int              sigev_signo;                /* Signal number */
  50.   union sigval     sigev_value;                /* Signal value */
  51.  
  52. #if defined(_POSIX_THREADS)
  53.   void           (*sigev_notify_function)( union sigval );
  54.                                                /* Notification function */
  55.   pthread_attr_t  *sigev_notify_attributes;    /* Notification Attributes */
  56. #endif
  57. };
  58.  
  59. /* Signal Actions, P1003.1b-1993, p. 64 */
  60. /* si_code values, p. 66 */
  61.  
  62. #define SI_USER    1    /* Sent by a user. kill(), abort(), etc */
  63. #define SI_QUEUE   2    /* Sent by sigqueue() */
  64. #define SI_TIMER   3    /* Sent by expiration of a timer_settime() timer */
  65. #define SI_ASYNCIO 4    /* Indicates completion of asycnhronous IO */
  66. #define SI_MESGQ   5    /* Indicates arrival of a message at an empty queue */
  67.  
  68. typedef struct {
  69.   int          si_signo;    /* Signal number */
  70.   int          si_code;     /* Cause of the signal */
  71.   union sigval si_value;    /* Signal value */
  72. } siginfo_t;
  73. #endif
  74.  
  75. /*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
  76.  
  77. #define SA_NOCLDSTOP 0x1   /* Do not generate SIGCHLD when children stop */
  78. #define SA_SIGINFO   0x2   /* Invoke the signal catching function with */
  79.                            /*   three arguments instead of one. */
  80. #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  81. #define SA_ONSTACK   0x4   /* Signal delivery will be on a separate stack. */
  82. #endif
  83.  
  84. /* struct sigaction notes from POSIX:
  85.  *
  86.  *  (1) Routines stored in sa_handler should take a single int as
  87.  *      their argument although the POSIX standard does not require this.
  88.  *      This is not longer true since at least POSIX.1-2008
  89.  *  (2) The fields sa_handler and sa_sigaction may overlap, and a conforming
  90.  *      application should not use both simultaneously.
  91.  */
  92.  
  93. typedef void (*_sig_func_ptr)(int);
  94.  
  95. struct sigaction {
  96.   int         sa_flags;       /* Special flags to affect behavior of signal */
  97.   sigset_t    sa_mask;        /* Additional set of signals to be blocked */
  98.                               /*   during execution of signal-catching */
  99.                               /*   function. */
  100.   union {
  101.     _sig_func_ptr _handler;  /* SIG_DFL, SIG_IGN, or pointer to a function */
  102. #if defined(_POSIX_REALTIME_SIGNALS)
  103.     void      (*_sigaction)( int, siginfo_t *, void * );
  104. #endif
  105.   } _signal_handlers;
  106. };
  107.  
  108. #define sa_handler    _signal_handlers._handler
  109. #if defined(_POSIX_REALTIME_SIGNALS)
  110. #define sa_sigaction  _signal_handlers._sigaction
  111. #endif
  112.  
  113. #elif defined(__CYGWIN__)
  114. #include <cygwin/signal.h>
  115. #else
  116. #define SA_NOCLDSTOP 1  /* only value supported now for sa_flags */
  117.  
  118. typedef void (*_sig_func_ptr)(int);
  119.  
  120. struct sigaction
  121. {
  122.         _sig_func_ptr sa_handler;
  123.         sigset_t sa_mask;
  124.         int sa_flags;
  125. };
  126. #endif /* defined(__rtems__) */
  127.  
  128. #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  129. /*
  130.  * Minimum and default signal stack constants. Allow for target overrides
  131.  * from <sys/features.h>.
  132.  */
  133. #ifndef MINSIGSTKSZ
  134. #define MINSIGSTKSZ     2048
  135. #endif
  136. #ifndef SIGSTKSZ
  137. #define SIGSTKSZ        8192
  138. #endif
  139.  
  140. /*
  141.  * Possible values for ss_flags in stack_t below.
  142.  */
  143. #define SS_ONSTACK      0x1
  144. #define SS_DISABLE      0x2
  145.  
  146. #endif
  147.  
  148. /*
  149.  * Structure used in sigaltstack call.
  150.  */
  151. typedef struct sigaltstack {
  152.   void     *ss_sp;    /* Stack base or pointer.  */
  153.   int       ss_flags; /* Flags.  */
  154.   size_t    ss_size;  /* Stack size.  */
  155. } stack_t;
  156.  
  157. #define SIG_SETMASK 0   /* set mask with sigprocmask() */
  158. #define SIG_BLOCK 1     /* set of signals to block */
  159. #define SIG_UNBLOCK 2   /* set of signals to, well, unblock */
  160.  
  161. /* These depend upon the type of sigset_t, which right now
  162.    is always a long.. They're in the POSIX namespace, but
  163.    are not ANSI. */
  164. #define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0)
  165. #define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0)
  166. #define sigemptyset(what)   (*(what) = 0, 0)
  167. #define sigfillset(what)    (*(what) = ~(0), 0)
  168. #define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)
  169.  
  170. int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset));
  171.  
  172. #if defined(_POSIX_THREADS)
  173. int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));
  174. #endif
  175.  
  176. #if defined(__CYGWIN__) || defined(__rtems__)
  177. #undef sigaddset
  178. #undef sigdelset
  179. #undef sigemptyset
  180. #undef sigfillset
  181. #undef sigismember
  182.  
  183. #ifdef _COMPILING_NEWLIB
  184. int _EXFUN(_kill, (pid_t, int));
  185. #endif /* _COMPILING_NEWLIB */
  186. #endif /* __CYGWIN__ || __rtems__ */
  187.  
  188. int _EXFUN(kill, (pid_t, int));
  189.  
  190. #if defined(__CYGWIN__) || defined(__rtems__)
  191. int _EXFUN(killpg, (pid_t, int));
  192. int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));
  193. int _EXFUN(sigaddset, (sigset_t *, const int));
  194. int _EXFUN(sigdelset, (sigset_t *, const int));
  195. int _EXFUN(sigismember, (const sigset_t *, int));
  196. int _EXFUN(sigfillset, (sigset_t *));
  197. int _EXFUN(sigemptyset, (sigset_t *));
  198. int _EXFUN(sigpending, (sigset_t *));
  199. int _EXFUN(sigsuspend, (const sigset_t *));
  200. int _EXFUN(sigpause, (int));
  201.  
  202. #if defined(__CYGWIN__) || defined(__rtems__)
  203. #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  204. int _EXFUN(sigaltstack, (const stack_t *__restrict, stack_t *__restrict));
  205. #endif
  206. #endif
  207.  
  208. #if defined(_POSIX_THREADS)
  209. #ifdef __CYGWIN__
  210. #  ifndef _CYGWIN_TYPES_H
  211. #    error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib.
  212. #  endif
  213. #endif
  214. int _EXFUN(pthread_kill, (pthread_t thread, int sig));
  215. #endif
  216.  
  217. #if defined(_POSIX_REALTIME_SIGNALS)
  218.  
  219. /*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
  220.     NOTE: P1003.1c/D10, p. 39 adds sigwait().  */
  221.  
  222. int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info));
  223. int _EXFUN(sigtimedwait,
  224.   (const sigset_t *set, siginfo_t *info, const struct timespec  *timeout)
  225. );
  226. int _EXFUN(sigwait, (const sigset_t *set, int *sig));
  227.  
  228. /*  3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */
  229. int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
  230.  
  231. #endif /* defined(_POSIX_REALTIME_SIGNALS) */
  232.  
  233. #endif /* defined(__CYGWIN__) || defined(__rtems__) */
  234.  
  235. /* #endif __STRICT_ANSI__ */
  236.  
  237. #if defined(___AM29K__)
  238. /* These all need to be defined for ANSI C, but I don't think they are
  239.    meaningful.  */
  240. #define SIGABRT 1
  241. #define SIGFPE 1
  242. #define SIGILL 1
  243. #define SIGINT 1
  244. #define SIGSEGV 1
  245. #define SIGTERM 1
  246. /* These need to be defined for POSIX, and some others do too.  */
  247. #define SIGHUP 1
  248. #define SIGQUIT 1
  249. #define NSIG 2
  250. #elif defined(__GO32__)
  251. #define SIGINT  1
  252. #define SIGKILL 2
  253. #define SIGPIPE 3
  254. #define SIGFPE  4
  255. #define SIGHUP  5
  256. #define SIGTERM 6
  257. #define SIGSEGV 7
  258. #define SIGTSTP 8
  259. #define SIGQUIT 9
  260. #define SIGTRAP 10
  261. #define SIGILL  11
  262. #define SIGEMT  12
  263. #define SIGALRM 13
  264. #define SIGBUS  14
  265. #define SIGLOST 15
  266. #define SIGSTOP 16
  267. #define SIGABRT 17
  268. #define SIGUSR1 18
  269. #define SIGUSR2 19
  270. #define NSIG    20
  271. #elif !defined(SIGTRAP)
  272. #define SIGHUP  1       /* hangup */
  273. #define SIGINT  2       /* interrupt */
  274. #define SIGQUIT 3       /* quit */
  275. #define SIGILL  4       /* illegal instruction (not reset when caught) */
  276. #define SIGTRAP 5       /* trace trap (not reset when caught) */
  277. #define SIGIOT  6       /* IOT instruction */
  278. #define SIGABRT 6       /* used by abort, replace SIGIOT in the future */
  279. #define SIGEMT  7       /* EMT instruction */
  280. #define SIGFPE  8       /* floating point exception */
  281. #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  282. #define SIGBUS  10      /* bus error */
  283. #define SIGSEGV 11      /* segmentation violation */
  284. #define SIGSYS  12      /* bad argument to system call */
  285. #define SIGPIPE 13      /* write on a pipe with no one to read it */
  286. #define SIGALRM 14      /* alarm clock */
  287. #define SIGTERM 15      /* software termination signal from kill */
  288.  
  289. #if defined(__rtems__)
  290. #define SIGURG  16      /* urgent condition on IO channel */
  291. #define SIGSTOP 17      /* sendable stop signal not from tty */
  292. #define SIGTSTP 18      /* stop signal from tty */
  293. #define SIGCONT 19      /* continue a stopped process */
  294. #define SIGCHLD 20      /* to parent on child stop or exit */
  295. #define SIGCLD  20      /* System V name for SIGCHLD */
  296. #define SIGTTIN 21      /* to readers pgrp upon background tty read */
  297. #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
  298. #define SIGIO   23      /* input/output possible signal */
  299. #define SIGPOLL SIGIO   /* System V name for SIGIO */
  300. #define SIGWINCH 24     /* window changed */
  301. #define SIGUSR1 25      /* user defined signal 1 */
  302. #define SIGUSR2 26      /* user defined signal 2 */
  303.  
  304. /* Real-Time Signals Range, P1003.1b-1993, p. 61
  305.    NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX
  306.          (which is a minimum of 8) signals.
  307.  */
  308. #define SIGRTMIN 27
  309. #define SIGRTMAX 31
  310. #define __SIGFIRSTNOTRT SIGHUP
  311. #define __SIGLASTNOTRT  SIGUSR2
  312.  
  313. #define NSIG    32      /* signal 0 implied */
  314.  
  315. #elif defined(__svr4__)
  316. /* svr4 specifics. different signals above 15, and sigaction. */
  317. #define SIGUSR1 16
  318. #define SIGUSR2 17
  319. #define SIGCLD  18
  320. #define SIGPWR  19
  321. #define SIGWINCH 20
  322. #define SIGPOLL 22      /* 20 for x.out binaries!!!! */
  323. #define SIGSTOP 23      /* sendable stop signal not from tty */
  324. #define SIGTSTP 24      /* stop signal from tty */
  325. #define SIGCONT 25      /* continue a stopped process */
  326. #define SIGTTIN 26      /* to readers pgrp upon background tty read */
  327. #define SIGTTOU 27      /* like TTIN for output if (tp->t_local&LTOSTOP) */
  328. #define NSIG    28     
  329. #else
  330. #define SIGURG  16      /* urgent condition on IO channel */
  331. #define SIGSTOP 17      /* sendable stop signal not from tty */
  332. #define SIGTSTP 18      /* stop signal from tty */
  333. #define SIGCONT 19      /* continue a stopped process */
  334. #define SIGCHLD 20      /* to parent on child stop or exit */
  335. #define SIGCLD  20      /* System V name for SIGCHLD */
  336. #define SIGTTIN 21      /* to readers pgrp upon background tty read */
  337. #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
  338. #define SIGIO   23      /* input/output possible signal */
  339. #define SIGPOLL SIGIO   /* System V name for SIGIO */
  340. #define SIGXCPU 24      /* exceeded CPU time limit */
  341. #define SIGXFSZ 25      /* exceeded file size limit */
  342. #define SIGVTALRM 26    /* virtual time alarm */
  343. #define SIGPROF 27      /* profiling time alarm */
  344. #define SIGWINCH 28     /* window changed */
  345. #define SIGLOST 29      /* resource lost (eg, record-lock lost) */
  346. #define SIGUSR1 30      /* user defined signal 1 */
  347. #define SIGUSR2 31      /* user defined signal 2 */
  348. #define NSIG    32      /* signal 0 implied */
  349. #endif
  350. #endif
  351.  
  352. #ifdef __cplusplus
  353. }
  354. #endif
  355.  
  356. #if defined(__CYGWIN__)
  357. #if __POSIX_VISIBLE >= 200809
  358. #include <sys/ucontext.h>
  359. #endif
  360. #endif
  361.  
  362. #ifndef _SIGNAL_H_
  363. /* Some applications take advantage of the fact that <sys/signal.h>
  364.  * and <signal.h> are equivalent in glibc.  Allow for that here.  */
  365. #include <signal.h>
  366. #endif
  367. #endif /* _SYS_SIGNAL_H */
  368.