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

   1 /* siginfo_t, sigevent and constants.  Linux version.
   2    Copyright (C) 1997-2002, 2003 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #if !defined _SIGNAL_H && !defined __need_siginfo_t \
  21     && !defined __need_sigevent_t
  22 # error "Never include this file directly.  Use <signal.h> instead"
  23 #endif
  24
  25 #include <bits/wordsize.h>
  26
  27 #if (!defined __have_sigval_t \
  28      && (defined _SIGNAL_H || defined __need_siginfo_t \
  29          || defined __need_sigevent_t))
  30 # define __have_sigval_t        1
  31
  32 /* Type for data associated with a signal.  */
  33 typedef union sigval
  34   {
  35     int sival_int;
  36     void *sival_ptr;
  37   } sigval_t;
  38 #endif
  39
  40 #if (!defined __have_siginfo_t \
  41      && (defined _SIGNAL_H || defined __need_siginfo_t))
  42 # define __have_siginfo_t       1
  43
  44 # define __SI_MAX_SIZE     128
  45 # if __WORDSIZE == 64
  46 #  define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 4)
  47 # else
  48 #  define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 3)
  49 # endif
  50
  51 typedef struct siginfo
  52   {
  53     int si_signo;               /* Signal number.  */
  54     int si_errno;               /* If non-zero, an errno value associated with
  55                                    this signal, as defined in <errno.h>.  */
  56     int si_code;                /* Signal code.  */
  57
  58     union
  59       {
  60         int _pad[__SI_PAD_SIZE];
  61
  62          /* kill().  */
  63         struct
  64           {
  65             __pid_t si_pid;     /* Sending process ID.  */
  66             __uid_t si_uid;     /* Real user ID of sending process.  */
  67           } _kill;
  68
  69         /* POSIX.1b timers.  */
  70         struct
  71           {
  72             int si_tid;         /* Timer ID.  */
  73             int si_overrun;     /* Overrun count.  */
  74             sigval_t si_sigval; /* Signal value.  */
  75           } _timer;
  76
  77         /* POSIX.1b signals.  */
  78         struct
  79           {
  80             __pid_t si_pid;     /* Sending process ID.  */
  81             __uid_t si_uid;     /* Real user ID of sending process.  */
  82             sigval_t si_sigval; /* Signal value.  */
  83           } _rt;
  84
  85         /* SIGCHLD.  */
  86         struct
  87           {
  88             __pid_t si_pid;     /* Which child.  */
  89             __uid_t si_uid;     /* Real user ID of sending process.  */
  90             int si_status;      /* Exit value or signal.  */
  91             __clock_t si_utime;
  92             __clock_t si_stime;
  93           } _sigchld;
  94
  95         /* SIGILL, SIGFPE, SIGSEGV, SIGBUS.  */
  96         struct
  97           {
  98             void *si_addr;      /* Faulting insn/memory ref.  */
  99           } _sigfault;
 100
 101         /* SIGPOLL.  */
 102         struct
 103           {
 104             long int si_band;   /* Band event for SIGPOLL.  */
 105             int si_fd;
 106           } _sigpoll;
 107       } _sifields;
 108   } siginfo_t;
 109
 110
 111 /* X/Open requires some more fields with fixed names.  */
 112 # define si_pid         _sifields._kill.si_pid
 113 # define si_uid         _sifields._kill.si_uid
 114 # define si_timerid     _sifields._timer.si_tid
 115 # define si_overrun     _sifields._timer.si_overrun
 116 # define si_status      _sifields._sigchld.si_status
 117 # define si_utime       _sifields._sigchld.si_utime
 118 # define si_stime       _sifields._sigchld.si_stime
 119 # define si_value       _sifields._rt.si_sigval
 120 # define si_int         _sifields._rt.si_sigval.sival_int
 121 # define si_ptr         _sifields._rt.si_sigval.sival_ptr
 122 # define si_addr        _sifields._sigfault.si_addr
 123 # define si_band        _sifields._sigpoll.si_band
 124 # define si_fd          _sifields._sigpoll.si_fd
 125
 126
 127 /* Values for `si_code'.  Positive values are reserved for kernel-generated
 128    signals.  */
 129 enum
 130 {
 131   SI_ASYNCNL = -60,             /* Sent by asynch name lookup completion.  */
 132 # define SI_ASYNCNL     SI_ASYNCNL
 133   SI_TKILL = -6,                /* Sent by tkill.  */
 134 # define SI_TKILL       SI_TKILL
 135   SI_SIGIO,                     /* Sent by queued SIGIO. */
 136 # define SI_SIGIO       SI_SIGIO
 137   SI_ASYNCIO,                   /* Sent by AIO completion.  */
 138 # define SI_ASYNCIO     SI_ASYNCIO
 139   SI_MESGQ,                     /* Sent by real time mesq state change.  */
 140 # define SI_MESGQ       SI_MESGQ
 141   SI_TIMER,                     /* Sent by timer expiration.  */
 142 # define SI_TIMER       SI_TIMER
 143   SI_QUEUE,                     /* Sent by sigqueue.  */
 144 # define SI_QUEUE       SI_QUEUE
 145   SI_USER,                      /* Sent by kill, sigsend, raise.  */
 146 # define SI_USER        SI_USER
 147   SI_KERNEL = 0x80              /* Send by kernel.  */
 148 #define SI_KERNEL       SI_KERNEL
 149 };
 150
 151
 152 /* `si_code' values for SIGILL signal.  */
 153 enum
 154 {
 155   ILL_ILLOPC = 1,               /* Illegal opcode.  */
 156 # define ILL_ILLOPC     ILL_ILLOPC
 157   ILL_ILLOPN,                   /* Illegal operand.  */
 158 # define ILL_ILLOPN     ILL_ILLOPN
 159   ILL_ILLADR,                   /* Illegal addressing mode.  */
 160 # define ILL_ILLADR     ILL_ILLADR
 161   ILL_ILLTRP,                   /* Illegal trap. */
 162 # define ILL_ILLTRP     ILL_ILLTRP
 163   ILL_PRVOPC,                   /* Privileged opcode.  */
 164 # define ILL_PRVOPC     ILL_PRVOPC
 165   ILL_PRVREG,                   /* Privileged register.  */
 166 # define ILL_PRVREG     ILL_PRVREG
 167   ILL_COPROC,                   /* Coprocessor error.  */
 168 # define ILL_COPROC     ILL_COPROC
 169   ILL_BADSTK                    /* Internal stack error.  */
 170 # define ILL_BADSTK     ILL_BADSTK
 171 };
 172
 173 /* `si_code' values for SIGFPE signal.  */
 174 enum
 175 {
 176   FPE_INTDIV = 1,               /* Integer divide by zero.  */
 177 # define FPE_INTDIV     FPE_INTDIV
 178   FPE_INTOVF,                   /* Integer overflow.  */
 179 # define FPE_INTOVF     FPE_INTOVF
 180   FPE_FLTDIV,                   /* Floating point divide by zero.  */
 181 # define FPE_FLTDIV     FPE_FLTDIV
 182   FPE_FLTOVF,                   /* Floating point overflow.  */
 183 # define FPE_FLTOVF     FPE_FLTOVF
 184   FPE_FLTUND,                   /* Floating point underflow.  */
 185 # define FPE_FLTUND     FPE_FLTUND
 186   FPE_FLTRES,                   /* Floating point inexact result.  */
 187 # define FPE_FLTRES     FPE_FLTRES
 188   FPE_FLTINV,                   /* Floating point invalid operation.  */
 189 # define FPE_FLTINV     FPE_FLTINV
 190   FPE_FLTSUB                    /* Subscript out of range.  */
 191 # define FPE_FLTSUB     FPE_FLTSUB
 192 };
 193
 194 /* `si_code' values for SIGSEGV signal.  */
 195 enum
 196 {
 197   SEGV_MAPERR = 1,              /* Address not mapped to object.  */
 198 # define SEGV_MAPERR    SEGV_MAPERR
 199   SEGV_ACCERR                   /* Invalid permissions for mapped object.  */
 200 # define SEGV_ACCERR    SEGV_ACCERR
 201 };
 202
 203 /* `si_code' values for SIGBUS signal.  */
 204 enum
 205 {
 206   BUS_ADRALN = 1,               /* Invalid address alignment.  */
 207 # define BUS_ADRALN     BUS_ADRALN
 208   BUS_ADRERR,                   /* Non-existant physical address.  */
 209 # define BUS_ADRERR     BUS_ADRERR
 210   BUS_OBJERR                    /* Object specific hardware error.  */
 211 # define BUS_OBJERR     BUS_OBJERR
 212 };
 213
 214 /* `si_code' values for SIGTRAP signal.  */
 215 enum
 216 {
 217   TRAP_BRKPT = 1,               /* Process breakpoint.  */
 218 # define TRAP_BRKPT     TRAP_BRKPT
 219   TRAP_TRACE                    /* Process trace trap.  */
 220 # define TRAP_TRACE     TRAP_TRACE
 221 };
 222
 223 /* `si_code' values for SIGCHLD signal.  */
 224 enum
 225 {
 226   CLD_EXITED = 1,               /* Child has exited.  */
 227 # define CLD_EXITED     CLD_EXITED
 228   CLD_KILLED,                   /* Child was killed.  */
 229 # define CLD_KILLED     CLD_KILLED
 230   CLD_DUMPED,                   /* Child terminated abnormally.  */
 231 # define CLD_DUMPED     CLD_DUMPED
 232   CLD_TRAPPED,                  /* Traced child has trapped.  */
 233 # define CLD_TRAPPED    CLD_TRAPPED
 234   CLD_STOPPED,                  /* Child has stopped.  */
 235 # define CLD_STOPPED    CLD_STOPPED
 236   CLD_CONTINUED                 /* Stopped child has continued.  */
 237 # define CLD_CONTINUED  CLD_CONTINUED
 238 };
 239
 240 /* `si_code' values for SIGPOLL signal.  */
 241 enum
 242 {
 243   POLL_IN = 1,                  /* Data input available.  */
 244 # define POLL_IN        POLL_IN
 245   POLL_OUT,                     /* Output buffers available.  */
 246 # define POLL_OUT       POLL_OUT
 247   POLL_MSG,                     /* Input message available.   */
 248 # define POLL_MSG       POLL_MSG
 249   POLL_ERR,                     /* I/O error.  */
 250 # define POLL_ERR       POLL_ERR
 251   POLL_PRI,                     /* High priority input available.  */
 252 # define POLL_PRI       POLL_PRI
 253   POLL_HUP                      /* Device disconnected.  */
 254 # define POLL_HUP       POLL_HUP
 255 };
 256
 257 # undef __need_siginfo_t
 258 #endif  /* !have siginfo_t && (have _SIGNAL_H || need siginfo_t).  */
 259
 260
 261 #if (defined _SIGNAL_H || defined __need_sigevent_t) \
 262     && !defined __have_sigevent_t
 263 # define __have_sigevent_t      1
 264
 265 /* Structure to transport application-defined values with signals.  */
 266 # define __SIGEV_MAX_SIZE       64
 267 # if __WORDSIZE == 64
 268 #  define __SIGEV_PAD_SIZE      ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
 269 # else
 270 #  define __SIGEV_PAD_SIZE      ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
 271 # endif
 272
 273 typedef struct sigevent
 274   {
 275     sigval_t sigev_value;
 276     int sigev_signo;
 277     int sigev_notify;
 278
 279     union
 280       {
 281         int _pad[__SIGEV_PAD_SIZE];
 282
 283         /* When SIGEV_SIGNAL and SIGEV_THREAD_ID set, LWP ID of the
 284            thread to receive the signal.  */
 285         __pid_t _tid;
 286
 287         struct
 288           {
 289             void (*_function) (sigval_t);       /* Function to start.  */
 290             void *_attribute;                   /* Really pthread_attr_t.  */
 291           } _sigev_thread;
 292       } _sigev_un;
 293   } sigevent_t;
 294
 295 /* POSIX names to access some of the members.  */
 296 # define sigev_notify_function   _sigev_un._sigev_thread._function
 297 # define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 298
 299 /* `sigev_notify' values.  */
 300 enum
 301 {
 302   SIGEV_SIGNAL = 0,             /* Notify via signal.  */
 303 # define SIGEV_SIGNAL   SIGEV_SIGNAL
 304   SIGEV_NONE,                   /* Other notification: meaningless.  */
 305 # define SIGEV_NONE     SIGEV_NONE
 306   SIGEV_THREAD,                 /* Deliver via thread creation.  */
 307 # define SIGEV_THREAD   SIGEV_THREAD
 308
 309   SIGEV_THREAD_ID = 4           /* Send signal to specific thread.  */
 310 #define SIGEV_THREAD_ID SIGEV_THREAD_ID
 311 };
 312
 313 #endif  /* have _SIGNAL_H.  */