The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/signal.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1982, 1986, 1989, 1991, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  * (c) UNIX System Laboratories, Inc.
    5  * All or some portions of this file are derived from material licensed
    6  * to the University of California by American Telephone and Telegraph
    7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
    8  * the permission of UNIX System Laboratories, Inc.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)signal.h    8.4 (Berkeley) 5/4/95
   35  * $FreeBSD: releng/11.1/sys/sys/signal.h 306398 2016-09-28 09:28:26Z kib $
   36  */
   37 
   38 #ifndef _SYS_SIGNAL_H_
   39 #define _SYS_SIGNAL_H_
   40 
   41 #include <sys/cdefs.h>
   42 #include <sys/_types.h>
   43 #include <sys/_sigset.h>
   44 
   45 #include <machine/_limits.h>    /* __MINSIGSTKSZ */
   46 #include <machine/signal.h>     /* sig_atomic_t; trap codes; sigcontext */
   47 
   48 #if __POSIX_VISIBLE >= 200809
   49 
   50 #include <sys/_pthreadtypes.h>
   51 #include <sys/_timespec.h>
   52 
   53 #ifndef _SIZE_T_DECLARED
   54 typedef __size_t        size_t;
   55 #define _SIZE_T_DECLARED
   56 #endif
   57 
   58 #ifndef _UID_T_DECLARED
   59 typedef __uid_t         uid_t;
   60 #define _UID_T_DECLARED
   61 #endif
   62 
   63 #endif /* __POSIX_VISIBLE >= 200809 */
   64 
   65 /*
   66  * System defined signals.
   67  */
   68 #if __POSIX_VISIBLE || __XSI_VISIBLE
   69 #define SIGHUP          1       /* hangup */
   70 #endif
   71 #define SIGINT          2       /* interrupt */
   72 #if __POSIX_VISIBLE || __XSI_VISIBLE
   73 #define SIGQUIT         3       /* quit */
   74 #endif
   75 #define SIGILL          4       /* illegal instr. (not reset when caught) */
   76 #if __XSI_VISIBLE
   77 #define SIGTRAP         5       /* trace trap (not reset when caught) */
   78 #endif
   79 #define SIGABRT         6       /* abort() */
   80 #if __BSD_VISIBLE
   81 #define SIGIOT          SIGABRT /* compatibility */
   82 #define SIGEMT          7       /* EMT instruction */
   83 #endif
   84 #define SIGFPE          8       /* floating point exception */
   85 #if __POSIX_VISIBLE || __XSI_VISIBLE
   86 #define SIGKILL         9       /* kill (cannot be caught or ignored) */
   87 #endif
   88 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
   89 #define SIGBUS          10      /* bus error */
   90 #endif
   91 #define SIGSEGV         11      /* segmentation violation */
   92 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
   93 #define SIGSYS          12      /* non-existent system call invoked */
   94 #endif
   95 #if __POSIX_VISIBLE || __XSI_VISIBLE
   96 #define SIGPIPE         13      /* write on a pipe with no one to read it */
   97 #define SIGALRM         14      /* alarm clock */
   98 #endif
   99 #define SIGTERM         15      /* software termination signal from kill */
  100 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
  101 #define SIGURG          16      /* urgent condition on IO channel */
  102 #endif
  103 #if __POSIX_VISIBLE || __XSI_VISIBLE
  104 #define SIGSTOP         17      /* sendable stop signal not from tty */
  105 #define SIGTSTP         18      /* stop signal from tty */
  106 #define SIGCONT         19      /* continue a stopped process */
  107 #define SIGCHLD         20      /* to parent on child stop or exit */
  108 #define SIGTTIN         21      /* to readers pgrp upon background tty read */
  109 #define SIGTTOU         22      /* like TTIN if (tp->t_local&LTOSTOP) */
  110 #endif
  111 #if __BSD_VISIBLE
  112 #define SIGIO           23      /* input/output possible signal */
  113 #endif
  114 #if __XSI_VISIBLE
  115 #define SIGXCPU         24      /* exceeded CPU time limit */
  116 #define SIGXFSZ         25      /* exceeded file size limit */
  117 #define SIGVTALRM       26      /* virtual time alarm */
  118 #define SIGPROF         27      /* profiling time alarm */
  119 #endif
  120 #if __BSD_VISIBLE
  121 #define SIGWINCH        28      /* window size changes */
  122 #define SIGINFO         29      /* information request */
  123 #endif
  124 #if __POSIX_VISIBLE || __XSI_VISIBLE
  125 #define SIGUSR1         30      /* user defined signal 1 */
  126 #define SIGUSR2         31      /* user defined signal 2 */
  127 #endif
  128 #if __BSD_VISIBLE
  129 #define SIGTHR          32      /* reserved by thread library. */
  130 #define SIGLWP          SIGTHR
  131 #define SIGLIBRT        33      /* reserved by real-time library. */
  132 #endif
  133 
  134 #define SIGRTMIN        65
  135 #define SIGRTMAX        126
  136 
  137 #define SIG_DFL         ((__sighandler_t *)0)
  138 #define SIG_IGN         ((__sighandler_t *)1)
  139 #define SIG_ERR         ((__sighandler_t *)-1)
  140 /* #define      SIG_CATCH       ((__sighandler_t *)2) See signalvar.h */
  141 #define SIG_HOLD        ((__sighandler_t *)3)
  142 
  143 /*
  144  * Type of a signal handling function.
  145  *
  146  * Language spec sez signal handlers take exactly one arg, even though we
  147  * actually supply three.  Ugh!
  148  *
  149  * We don't try to hide the difference by leaving out the args because
  150  * that would cause warnings about conformant programs.  Nonconformant
  151  * programs can avoid the warnings by casting to (__sighandler_t *) or
  152  * sig_t before calling signal() or assigning to sa_handler or sv_handler.
  153  *
  154  * The kernel should reverse the cast before calling the function.  It
  155  * has no way to do this, but on most machines 1-arg and 3-arg functions
  156  * have the same calling protocol so there is no problem in practice.
  157  * A bit in sa_flags could be used to specify the number of args.
  158  */
  159 typedef void __sighandler_t(int);
  160 
  161 #if __POSIX_VISIBLE || __XSI_VISIBLE
  162 #ifndef _SIGSET_T_DECLARED
  163 #define _SIGSET_T_DECLARED
  164 typedef __sigset_t      sigset_t;
  165 #endif
  166 #endif
  167 
  168 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500
  169 union sigval {
  170         /* Members as suggested by Annex C of POSIX 1003.1b. */
  171         int     sival_int;
  172         void    *sival_ptr;
  173         /* 6.0 compatibility */
  174         int     sigval_int;
  175         void    *sigval_ptr;
  176 };
  177 #endif
  178 
  179 #if __POSIX_VISIBLE >= 199309
  180 
  181 struct pthread_attr;
  182 
  183 struct sigevent {
  184         int     sigev_notify;           /* Notification type */
  185         int     sigev_signo;            /* Signal number */
  186         union sigval sigev_value;       /* Signal value */
  187         union {
  188                 __lwpid_t       _threadid;
  189                 struct {
  190                         void (*_function)(union sigval);
  191                         struct pthread_attr **_attribute;
  192                 } _sigev_thread;
  193                 unsigned short _kevent_flags;
  194                 long __spare__[8];
  195         } _sigev_un;
  196 };
  197 
  198 #if __BSD_VISIBLE
  199 #define sigev_notify_kqueue             sigev_signo
  200 #define sigev_notify_kevent_flags       _sigev_un._kevent_flags
  201 #define sigev_notify_thread_id          _sigev_un._threadid
  202 #endif
  203 #define sigev_notify_function           _sigev_un._sigev_thread._function
  204 #define sigev_notify_attributes         _sigev_un._sigev_thread._attribute
  205 
  206 #define SIGEV_NONE      0               /* No async notification. */
  207 #define SIGEV_SIGNAL    1               /* Generate a queued signal. */
  208 #define SIGEV_THREAD    2               /* Call back from another pthread. */
  209 #if __BSD_VISIBLE
  210 #define SIGEV_KEVENT    3               /* Generate a kevent. */
  211 #define SIGEV_THREAD_ID 4               /* Send signal to a kernel thread. */
  212 #endif
  213 
  214 #endif /* __POSIX_VISIBLE >= 199309 */
  215 
  216 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE
  217 typedef struct __siginfo {
  218         int     si_signo;               /* signal number */
  219         int     si_errno;               /* errno association */
  220         /*
  221          * Cause of signal, one of the SI_ macros or signal-specific
  222          * values, i.e. one of the FPE_... values for SIGFPE.  This
  223          * value is equivalent to the second argument to an old-style
  224          * FreeBSD signal handler.
  225          */
  226         int     si_code;                /* signal code */
  227         __pid_t si_pid;                 /* sending process */
  228         __uid_t si_uid;                 /* sender's ruid */
  229         int     si_status;              /* exit value */
  230         void    *si_addr;               /* faulting instruction */
  231         union sigval si_value;          /* signal value */
  232         union   {
  233                 struct {
  234                         int     _trapno;/* machine specific trap code */
  235                 } _fault;
  236                 struct {
  237                         int     _timerid;
  238                         int     _overrun;
  239                 } _timer;
  240                 struct {
  241                         int     _mqd;
  242                 } _mesgq;
  243                 struct {
  244                         long    _band;          /* band event for SIGPOLL */
  245                 } _poll;                        /* was this ever used ? */
  246                 struct {
  247                         long    __spare1__;
  248                         int     __spare2__[7];
  249                 } __spare__;
  250         } _reason;
  251 } siginfo_t;
  252 
  253 #define si_trapno       _reason._fault._trapno
  254 #define si_timerid      _reason._timer._timerid
  255 #define si_overrun      _reason._timer._overrun
  256 #define si_mqd          _reason._mesgq._mqd
  257 #define si_band         _reason._poll._band
  258 
  259 /** si_code **/
  260 /* codes for SIGILL */
  261 #define ILL_ILLOPC      1       /* Illegal opcode.                      */
  262 #define ILL_ILLOPN      2       /* Illegal operand.                     */
  263 #define ILL_ILLADR      3       /* Illegal addressing mode.             */
  264 #define ILL_ILLTRP      4       /* Illegal trap.                        */
  265 #define ILL_PRVOPC      5       /* Privileged opcode.                   */
  266 #define ILL_PRVREG      6       /* Privileged register.                 */
  267 #define ILL_COPROC      7       /* Coprocessor error.                   */
  268 #define ILL_BADSTK      8       /* Internal stack error.                */
  269 
  270 /* codes for SIGBUS */
  271 #define BUS_ADRALN      1       /* Invalid address alignment.           */
  272 #define BUS_ADRERR      2       /* Nonexistent physical address.        */
  273 #define BUS_OBJERR      3       /* Object-specific hardware error.      */
  274 
  275 /* codes for SIGSEGV */
  276 #define SEGV_MAPERR     1       /* Address not mapped to object.        */
  277 #define SEGV_ACCERR     2       /* Invalid permissions for mapped       */
  278                                 /* object.                              */
  279 
  280 /* codes for SIGFPE */
  281 #define FPE_INTOVF      1       /* Integer overflow.                    */
  282 #define FPE_INTDIV      2       /* Integer divide by zero.              */
  283 #define FPE_FLTDIV      3       /* Floating point divide by zero.       */
  284 #define FPE_FLTOVF      4       /* Floating point overflow.             */
  285 #define FPE_FLTUND      5       /* Floating point underflow.            */
  286 #define FPE_FLTRES      6       /* Floating point inexact result.       */
  287 #define FPE_FLTINV      7       /* Invalid floating point operation.    */
  288 #define FPE_FLTSUB      8       /* Subscript out of range.              */
  289 
  290 /* codes for SIGTRAP */
  291 #define TRAP_BRKPT      1       /* Process breakpoint.                  */
  292 #define TRAP_TRACE      2       /* Process trace trap.                  */
  293 #define TRAP_DTRACE     3       /* DTrace induced trap.                 */
  294 #define TRAP_CAP        4       /* Capabilities protective trap.        */
  295 
  296 /* codes for SIGCHLD */
  297 #define CLD_EXITED      1       /* Child has exited                     */
  298 #define CLD_KILLED      2       /* Child has terminated abnormally but  */
  299                                 /* did not create a core file           */
  300 #define CLD_DUMPED      3       /* Child has terminated abnormally and  */
  301                                 /* created a core file                  */
  302 #define CLD_TRAPPED     4       /* Traced child has trapped             */
  303 #define CLD_STOPPED     5       /* Child has stopped                    */
  304 #define CLD_CONTINUED   6       /* Stopped child has continued          */
  305 
  306 /* codes for SIGPOLL */
  307 #define POLL_IN         1       /* Data input available                 */
  308 #define POLL_OUT        2       /* Output buffers available             */
  309 #define POLL_MSG        3       /* Input message available              */
  310 #define POLL_ERR        4       /* I/O Error                            */
  311 #define POLL_PRI        5       /* High priority input available        */
  312 #define POLL_HUP        6       /* Device disconnected                  */
  313 
  314 #endif
  315 
  316 #if __POSIX_VISIBLE || __XSI_VISIBLE
  317 struct __siginfo;
  318 
  319 /*
  320  * Signal vector "template" used in sigaction call.
  321  */
  322 struct sigaction {
  323         union {
  324                 void    (*__sa_handler)(int);
  325                 void    (*__sa_sigaction)(int, struct __siginfo *, void *);
  326         } __sigaction_u;                /* signal handler */
  327         int     sa_flags;               /* see signal options below */
  328         sigset_t sa_mask;               /* signal mask to apply */
  329 };
  330 
  331 #define sa_handler      __sigaction_u.__sa_handler
  332 #endif
  333 
  334 #if __XSI_VISIBLE
  335 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */
  336 #define sa_sigaction    __sigaction_u.__sa_sigaction
  337 #endif
  338 
  339 #if __POSIX_VISIBLE || __XSI_VISIBLE
  340 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
  341 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */
  342 
  343 #if __XSI_VISIBLE
  344 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
  345 #define SA_RESTART      0x0002  /* restart system call on signal return */
  346 #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
  347 #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
  348 #define SA_NOCLDWAIT    0x0020  /* don't keep zombies around */
  349 #define SA_SIGINFO      0x0040  /* signal handler with SA_SIGINFO args */
  350 #endif
  351 
  352 #if __BSD_VISIBLE
  353 #define NSIG            32      /* number of old signals (counting 0) */
  354 #endif
  355 
  356 #if __POSIX_VISIBLE || __XSI_VISIBLE
  357 #define SI_NOINFO       0               /* No signal info besides si_signo. */
  358 #define SI_USER         0x10001         /* Signal sent by kill(). */
  359 #define SI_QUEUE        0x10002         /* Signal sent by the sigqueue(). */
  360 #define SI_TIMER        0x10003         /* Signal generated by expiration of */
  361                                         /* a timer set by timer_settime(). */
  362 #define SI_ASYNCIO      0x10004         /* Signal generated by completion of */
  363                                         /* an asynchronous I/O request.*/
  364 #define SI_MESGQ        0x10005         /* Signal generated by arrival of a */
  365                                         /* message on an empty message queue. */
  366 #define SI_KERNEL       0x10006
  367 #define SI_LWP          0x10007         /* Signal sent by thr_kill */
  368 #endif
  369 #if __BSD_VISIBLE
  370 #define SI_UNDEFINED    0
  371 #endif
  372 
  373 #if __BSD_VISIBLE
  374 typedef __sighandler_t  *sig_t; /* type of pointer to a signal function */
  375 typedef void __siginfohandler_t(int, struct __siginfo *, void *);
  376 #endif
  377 
  378 #if __XSI_VISIBLE
  379 #if __BSD_VISIBLE
  380 #define __stack_t sigaltstack
  381 #endif
  382 typedef struct __stack_t stack_t;
  383 
  384 #define SS_ONSTACK      0x0001  /* take signal on alternate stack */
  385 #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
  386 #define MINSIGSTKSZ     __MINSIGSTKSZ           /* minimum stack size */
  387 #define SIGSTKSZ        (MINSIGSTKSZ + 32768)   /* recommended stack size */
  388 #endif
  389 
  390 /*
  391  * Structure used in sigaltstack call.  Its definition is always
  392  * needed for __ucontext.  If __BSD_VISIBLE is defined, the structure
  393  * tag is actually sigaltstack.
  394  */
  395 struct __stack_t {
  396         void    *ss_sp;                 /* signal stack base */
  397         __size_t ss_size;               /* signal stack length */
  398         int     ss_flags;               /* SS_DISABLE and/or SS_ONSTACK */
  399 };
  400 
  401 #if __BSD_VISIBLE
  402 /*
  403  * 4.3 compatibility:
  404  * Signal vector "template" used in sigvec call.
  405  */
  406 struct sigvec {
  407         __sighandler_t *sv_handler;     /* signal handler */
  408         int     sv_mask;                /* signal mask to apply */
  409         int     sv_flags;               /* see signal options below */
  410 };
  411 
  412 #define SV_ONSTACK      SA_ONSTACK
  413 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
  414 #define SV_RESETHAND    SA_RESETHAND
  415 #define SV_NODEFER      SA_NODEFER
  416 #define SV_NOCLDSTOP    SA_NOCLDSTOP
  417 #define SV_SIGINFO      SA_SIGINFO
  418 #define sv_onstack      sv_flags        /* isn't compatibility wonderful! */
  419 #endif
  420 
  421 /* Keep this in one place only */
  422 #if defined(_KERNEL) && defined(COMPAT_43) && \
  423     !defined(__i386__)
  424 struct osigcontext {
  425         int _not_used;
  426 };
  427 #endif
  428 
  429 #if __XSI_VISIBLE
  430 /*
  431  * Structure used in sigstack call.
  432  */
  433 struct sigstack {
  434         void    *ss_sp;                 /* signal stack pointer */
  435         int     ss_onstack;             /* current status */
  436 };
  437 #endif
  438 
  439 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112
  440 /*
  441  * Macro for converting signal number to a mask suitable for
  442  * sigblock().
  443  */
  444 #define sigmask(m)      (1 << ((m)-1))
  445 #endif
  446 
  447 #if __BSD_VISIBLE
  448 #define BADSIG          SIG_ERR
  449 #endif
  450 
  451 #if __POSIX_VISIBLE || __XSI_VISIBLE
  452 /*
  453  * Flags for sigprocmask:
  454  */
  455 #define SIG_BLOCK       1       /* block specified signal set */
  456 #define SIG_UNBLOCK     2       /* unblock specified signal set */
  457 #define SIG_SETMASK     3       /* set specified signal set */
  458 #endif
  459 
  460 /*
  461  * For historical reasons; programs expect signal's return value to be
  462  * defined by <sys/signal.h>.
  463  */
  464 __BEGIN_DECLS
  465 __sighandler_t *signal(int, __sighandler_t *);
  466 __END_DECLS
  467 
  468 #endif /* !_SYS_SIGNAL_H_ */

Cache object: fcf5bf8399fc89b55b3b2649245f5034


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.