sysdeps/unix/sysv/linux/bits/siginfo.h

   1 /* siginfo_t, sigevent and constants.  Linux version.
   2    Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #if !defined _SIGNAL_H && !defined __need_siginfo_t
  21 # error "Never include this file directly.  Use <signal.h> instead"
  22 #endif
  23
  24 #if (!defined __have_siginfo_t \
  25      && (defined _SIGNAL_H || defined __need_siginfo_t))
  26 # define __have_siginfo_t       1
  27
  28 /* Type for data associated with a signal.  */
  29 typedef union sigval
  30   {
  31     int sival_int;
  32     void *sival_ptr;
  33   } sigval_t;
  34
  35 # define __SI_MAX_SIZE     128
  36 # define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 3)
  37
  38 typedef struct siginfo
  39   {
  40     int si_signo;               /* Signal number.  */
  41     int si_errno;               /* If non-zero, an errno value associated with
  42                                    this signal, as defined in <errno.h>.  */
  43     int si_code;                /* Signal code.  */
  44
  45     union
  46       {
  47         int _pad[__SI_PAD_SIZE];
  48
  49          /* kill().  */
  50         struct
  51           {
  52             __pid_t si_pid;     /* Sending process ID.  */
  53             __uid_t si_uid;     /* Real user ID of sending process.  */
  54           } _kill;
  55
  56         /* POSIX.1b timers.  */
  57         struct
  58           {
  59             unsigned int _timer1;
  60             unsigned int _timer2;
  61           } _timer;
  62
  63         /* POSIX.1b signals.  */
  64         struct
  65           {
  66             __pid_t si_pid;     /* Sending process ID.  */
  67             __uid_t si_uid;     /* Real user ID of sending process.  */
  68             sigval_t si_sigval; /* Signal value.  */
  69           } _rt;
  70
  71         /* SIGCHLD.  */
  72         struct
  73           {
  74             __pid_t si_pid;     /* Which child.  */
  75             __uid_t si_uid;     /* Real user ID of sending process.  */
  76             int si_status;      /* Exit value or signal.  */
  77             __clock_t si_utime;
  78             __clock_t si_stime;
  79           } _sigchld;
  80
  81         /* SIGILL, SIGFPE, SIGSEGV, SIGBUS.  */
  82         struct
  83           {
  84             void *si_addr;      /* Faulting insn/memory ref.  */
  85           } _sigfault;
  86
  87         /* SIGPOLL.  */
  88         struct
  89           {
  90             int si_band;        /* Band event for SIGPOLL.  */
  91             int si_fd;
  92           } _sigpoll;
  93       } _sifields;
  94   } siginfo_t;
  95
  96
  97 /* X/Open requires some more fields with fixed names.  */
  98 # define si_pid         _sifields._kill.si_pid
  99 # define si_uid         _sifields._kill.si_uid
 100 # define si_timer1      _sifields._timer._timer1
 101 # define si_timer2      _sifields._timer._timer2
 102 # define si_status      _sifields._sigchld.si_status
 103 # define si_utime       _sifields._sigchld.si_utime
 104 # define si_stime       _sifields._sigchld.si_stime
 105 # define si_value       _sifields._rt.si_sigval
 106 # define si_int         _sifields._rt.si_sigval.sival_int
 107 # define si_ptr         _sifields._rt.si_sigval.sival_ptr
 108 # define si_addr        _sifields._sigfault.si_addr
 109 # define si_band        _sifields._sigpoll.si_band
 110 # define si_fd          _sifields._sigpoll.si_fd
 111
 112
 113 /* Values for `si_code'.  Positive values are reserved for kernel-generated
 114    signals.  */
 115 enum
 116 {
 117   SI_SIGIO = -5,                /* Sent by queued SIGIO. */
 118 # define SI_SIGIO       SI_SIGIO
 119   SI_ASYNCIO,                   /* Sent by AIO completion.  */
 120 # define SI_ASYNCIO     SI_ASYNCIO
 121   SI_MESGQ,                     /* Sent by real time mesq state change.  */
 122 # define SI_MESGQ       SI_MESGQ
 123   SI_TIMER,                     /* Sent by timer expiration.  */
 124 # define SI_TIMER       SI_TIMER
 125   SI_QUEUE,                     /* Sent by sigqueue.  */
 126 # define SI_QUEUE       SI_QUEUE
 127   SI_USER,                      /* Sent by kill, sigsend, raise.  */
 128 # define SI_USER        SI_USER
 129   SI_KERNEL = 0x80              /* Send by kernel.  */
 130 #define SI_KERNEL       SI_KERNEL
 131 };
 132
 133
 134 /* `si_code' values for SIGILL signal.  */
 135 enum
 136 {
 137   ILL_ILLOPC = 1,               /* Illegal opcode.  */
 138 # define ILL_ILLOPC     ILL_ILLOPC
 139   ILL_ILLOPN,                   /* Illegal operand.  */
 140 # define ILL_ILLOPN     ILL_ILLOPN
 141   ILL_ILLADR,                   /* Illegal addressing mode.  */
 142 # define ILL_ILLADR     ILL_ILLADR
 143   ILL_ILLTRP,                   /* Illegal trap. */
 144 # define ILL_ILLTRP     ILL_ILLTRP
 145   ILL_PRVOPC,                   /* Privileged opcode.  */
 146 # define ILL_PRVOPC     ILL_PRVOPC
 147   ILL_PRVREG,                   /* Privileged register.  */
 148 # define ILL_PRVREG     ILL_PRVREG
 149   ILL_COPROC,                   /* Coprocessor error.  */
 150 # define ILL_COPROC     ILL_COPROC
 151   ILL_BADSTK                    /* Internal stack error.  */
 152 # define ILL_BADSTK     ILL_BADSTK
 153 };
 154
 155 /* `si_code' values for SIGFPE signal.  */
 156 enum
 157 {
 158   FPE_INTDIV = 1,               /* Integer divide by zero.  */
 159 # define FPE_INTDIV     FPE_INTDIV
 160   FPE_INTOVF,                   /* Integer overflow.  */
 161 # define FPE_INTOVF     FPE_INTOVF
 162   FPE_FLTDIV,                   /* Floating point divide by zero.  */
 163 # define FPE_FLTDIV     FPE_FLTDIV
 164   FPE_FLTOVF,                   /* Floating point overflow.  */
 165 # define FPE_FLTOVF     FPE_FLTOVF
 166   FPE_FLTUND,                   /* Floating point underflow.  */
 167 # define FPE_FLTUND     FPE_FLTUND
 168   FPE_FLTRES,                   /* Floating point inexact result.  */
 169 # define FPE_FLTRES     FPE_FLTRES
 170   FPE_FLTINV,                   /* Floating point invalid operation.  */
 171 # define FPE_FLTINV     FPE_FLTINV
 172   FPE_FLTSUB                    /* Subscript out of range.  */
 173 # define FPE_FLTSUB     FPE_FLTSUB
 174 };
 175
 176 /* `si_code' values for SIGSEGV signal.  */
 177 enum
 178 {
 179   SEGV_MAPERR = 1,              /* Address not mapped to object.  */
 180 # define SEGV_MAPERR    SEGV_MAPERR
 181   SEGV_ACCERR                   /* Invalid permissions for mapped object.  */
 182 # define SEGV_ACCERR    SEGV_ACCERR
 183 };
 184
 185 /* `si_code' values for SIGBUS signal.  */
 186 enum
 187 {
 188   BUS_ADRALN = 1,               /* Invalid address alignment.  */
 189 # define BUS_ADRALN     BUS_ADRALN
 190   BUS_ADRERR,                   /* Non-existant physical address.  */
 191 # define BUS_ADRERR     BUS_ADRERR
 192   BUS_OBJERR                    /* Object specific hardware error.  */
 193 # define BUS_OBJERR     BUS_OBJERR
 194 };
 195
 196 /* `si_code' values for SIGTRAP signal.  */
 197 enum
 198 {
 199   TRAP_BRKPT = 1,               /* Process breakpoint.  */
 200 # define TRAP_BRKPT     TRAP_BRKPT
 201   TRAP_TRACE                    /* Process trace trap.  */
 202 # define TRAP_TRACE     TRAP_TRACE
 203 };
 204
 205 /* `si_code' values for SIGCHLD signal.  */
 206 enum
 207 {
 208   CLD_EXITED = 1,               /* Child has exited.  */
 209 # define CLD_EXITED     CLD_EXITED
 210   CLD_KILLED,                   /* Child was killed.  */
 211 # define CLD_KILLED     CLD_KILLED
 212   CLD_DUMPED,                   /* Child terminated abnormally.  */
 213 # define CLD_DUMPED     CLD_DUMPED
 214   CLD_TRAPPED,                  /* Traced child has trapped.  */
 215 # define CLD_TRAPPED    CLD_TRAPPED
 216   CLD_STOPPED,                  /* Child has stopped.  */
 217 # define CLD_STOPPED    CLD_STOPPED
 218   CLD_CONTINUED                 /* Stopped child has continued.  */
 219 # define CLD_CONTINUED  CLD_CONTINUED
 220 };
 221
 222 /* `si_code' values for SIGPOLL signal.  */
 223 enum
 224 {
 225   POLL_IN = 1,                  /* Data input available.  */
 226 # define POLL_IN        POLL_IN
 227   POLL_OUT,                     /* Output buffers available.  */
 228 # define POLL_OUT       POLL_OUT
 229   POLL_MSG,                     /* Input message available.   */
 230 # define POLL_MSG       POLL_MSG
 231   POLL_ERR,                     /* I/O error.  */
 232 # define POLL_ERR       POLL_ERR
 233   POLL_PRI,                     /* High priority input available.  */
 234 # define POLL_PRI       POLL_PRI
 235   POLL_HUP                      /* Device disconnected.  */
 236 # define POLL_HUP       POLL_HUP
 237 };
 238
 239 # undef __need_siginfo_t
 240 #endif  /* !have siginfo_t && (have _SIGNAL_H || need siginfo_t).  */
 241
 242
 243 #if defined _SIGNAL_H && !defined __have_sigevent_t
 244 # define __have_sigevent_t      1
 245
 246 /* Structure to transport application-defined values with signals.  */
 247 # define __SIGEV_MAX_SIZE       64
 248 # define __SIGEV_PAD_SIZE       ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
 249
 250 typedef struct sigevent
 251   {
 252     sigval_t sigev_value;
 253     int sigev_signo;
 254     int sigev_notify;
 255
 256     union
 257       {
 258         int _pad[__SIGEV_PAD_SIZE];
 259
 260         struct
 261           {
 262             void (*_function) (sigval_t);         /* Function to start.  */
 263             void *_attribute;                     /* Really pthread_attr_t.  */
 264           } _sigev_thread;
 265       } _sigev_un;
 266   } sigevent_t;
 267
 268 /* POSIX names to access some of the members.  */
 269 # define sigev_notify_function   _sigev_un._sigev_thread._function
 270 # define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 271
 272 /* `sigev_notify' values.  */
 273 enum
 274 {
 275   SIGEV_SIGNAL = 0,             /* Notify via signal.  */
 276 # define SIGEV_SIGNAL   SIGEV_SIGNAL
 277   SIGEV_NONE,                   /* Other notification: meaningless.  */
 278 # define SIGEV_NONE     SIGEV_NONE
 279   SIGEV_THREAD                  /* Deliver via thread creation.  */
 280 # define SIGEV_THREAD   SIGEV_THREAD
 281 };
 282
 283 #endif  /* have _SIGNAL_H.  */