summaryrefslogtreecommitdiffstats
path: root/lib/signal.in.h
blob: 418d59c582db965a588446d84d59f51bba54b1df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
/* A GNU-like <signal.h>.

   Copyright (C) 2006-2023 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   This file is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif
@PRAGMA_COLUMNS@

#if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
/* Special invocation convention:
   - Inside glibc header files.
   - On glibc systems we have a sequence of nested includes
     <signal.h> -> <ucontext.h> -> <signal.h>.
     In this situation, the functions are not yet declared, therefore we cannot
     provide the C++ aliases.
   - On glibc systems with GCC 4.3 we have a sequence of nested includes
     <csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
     In this situation, some of the functions are not yet declared, therefore
     we cannot provide the C++ aliases.  */

# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@

#else
/* Normal invocation convention.  */

#ifndef _@GUARD_PREFIX@_SIGNAL_H

#define _GL_ALREADY_INCLUDING_SIGNAL_H

/* Define pid_t, uid_t.
   Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
   On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
   us; so include <sys/types.h> now, before the second inclusion guard.  */
#include <sys/types.h>

/* The include_next requires a split double-inclusion guard.  */
#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@

#undef _GL_ALREADY_INCLUDING_SIGNAL_H

#ifndef _@GUARD_PREFIX@_SIGNAL_H
#define _@GUARD_PREFIX@_SIGNAL_H

/* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
#if !_GL_CONFIG_H_INCLUDED
 #error "Please include config.h first."
#endif

/* For testing the OpenBSD version.  */
#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
    && defined __OpenBSD__
# include <sys/param.h>
#endif

/* Mac OS X 10.3, FreeBSD < 8.0, OpenBSD < 5.1, OSF/1 4.0, Solaris 2.6, Android,
   OS/2 kLIBC declare pthread_sigmask in <pthread.h>, not in <signal.h>.
   But avoid namespace pollution on glibc systems.*/
#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
    && ((defined __APPLE__ && defined __MACH__) \
        || (defined __FreeBSD__ && __FreeBSD__ < 8) \
        || (defined __OpenBSD__ && OpenBSD < 201205) \
        || defined __osf__ || defined __sun || defined __ANDROID__ \
        || defined __KLIBC__) \
    && ! defined __GLIBC__
# include <pthread.h>
#endif

/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */

/* The definition of _GL_ARG_NONNULL is copied here.  */

/* The definition of _GL_WARN_ON_USE is copied here.  */

/* On AIX, sig_atomic_t already includes volatile.  C99 requires that
   'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
   Hence, redefine this to a non-volatile type as needed.  */
#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
# if !GNULIB_defined_sig_atomic_t
typedef int rpl_sig_atomic_t;
#  undef sig_atomic_t
#  define sig_atomic_t rpl_sig_atomic_t
#  define GNULIB_defined_sig_atomic_t 1
# endif
#endif

/* A set or mask of signals.  */
#if !@HAVE_SIGSET_T@
# if !GNULIB_defined_sigset_t
typedef unsigned int sigset_t;
#  define GNULIB_defined_sigset_t 1
# endif
#endif

/* Define sighandler_t, the type of signal handlers.  A GNU extension.  */
#if !@HAVE_SIGHANDLER_T@
# ifdef __cplusplus
extern "C" {
# endif
# if !GNULIB_defined_sighandler_t
typedef void (*sighandler_t) (int);
#  define GNULIB_defined_sighandler_t 1
# endif
# ifdef __cplusplus
}
# endif
#endif


#if @GNULIB_SIGNAL_H_SIGPIPE@
# ifndef SIGPIPE
/* Define SIGPIPE to a value that does not overlap with other signals.  */
#  define SIGPIPE 13
#  define GNULIB_defined_SIGPIPE 1
/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
   'write', 'stdio'.  */
# endif
#endif


/* Maximum signal number + 1.  */
#ifndef NSIG
# if defined __TANDEM
#  define NSIG 32
# endif
#endif


#if @GNULIB_PTHREAD_SIGMASK@
# if @REPLACE_PTHREAD_SIGMASK@
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   undef pthread_sigmask
#   define pthread_sigmask rpl_pthread_sigmask
#  endif
_GL_FUNCDECL_RPL (pthread_sigmask, int,
                  (int how,
                   const sigset_t *restrict new_mask,
                   sigset_t *restrict old_mask));
_GL_CXXALIAS_RPL (pthread_sigmask, int,
                  (int how,
                   const sigset_t *restrict new_mask,
                   sigset_t *restrict old_mask));
# else
#  if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask)
_GL_FUNCDECL_SYS (pthread_sigmask, int,
                  (int how,
                   const sigset_t *restrict new_mask,
                   sigset_t *restrict old_mask));
#  endif
_GL_CXXALIAS_SYS (pthread_sigmask, int,
                  (int how,
                   const sigset_t *restrict new_mask,
                   sigset_t *restrict old_mask));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (pthread_sigmask);
# endif
#elif defined GNULIB_POSIXCHECK
# undef pthread_sigmask
# if HAVE_RAW_DECL_PTHREAD_SIGMASK
_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
                 "use gnulib module pthread_sigmask for portability");
# endif
#endif


#if @GNULIB_RAISE@
# if @REPLACE_RAISE@
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   undef raise
#   define raise rpl_raise
#  endif
_GL_FUNCDECL_RPL (raise, int, (int sig));
_GL_CXXALIAS_RPL (raise, int, (int sig));
# else
#  if !@HAVE_RAISE@
_GL_FUNCDECL_SYS (raise, int, (int sig));
#  endif
_GL_CXXALIAS_SYS (raise, int, (int sig));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (raise);
# endif
#elif defined GNULIB_POSIXCHECK
# undef raise
/* Assume raise is always declared.  */
_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
                 "use gnulib module raise for portability");
#endif


#if @GNULIB_SIGPROCMASK@
# if !@HAVE_POSIX_SIGNALBLOCKING@

#  ifndef GNULIB_defined_signal_blocking
#   define GNULIB_defined_signal_blocking 1
#  endif

/* Maximum signal number + 1.  */
#  ifndef NSIG
#   define NSIG 32
#  endif

/* This code supports only 32 signals.  */
#  if !GNULIB_defined_verify_NSIG_constraint
typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
#   define GNULIB_defined_verify_NSIG_constraint 1
#  endif

# endif

/* When also using extern inline, suppress the use of static inline in
   standard headers of problematic Apple configurations, as Libc at
   least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
   <https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>.
   Perhaps Apple will fix this some day.  */
#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
     && (defined __i386__ || defined __x86_64__))
# undef sigaddset
# undef sigdelset
# undef sigemptyset
# undef sigfillset
# undef sigismember
#endif

/* Test whether a given signal is contained in a signal set.  */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on Mac OS X.  */
#  if defined __cplusplus && defined GNULIB_NAMESPACE
#   undef sigismember
#  endif
# else
_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
                                    _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
_GL_CXXALIASWARN (sigismember);

/* Initialize a signal set to the empty set.  */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on Mac OS X.  */
#  if defined __cplusplus && defined GNULIB_NAMESPACE
#   undef sigemptyset
#  endif
# else
_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
_GL_CXXALIASWARN (sigemptyset);

/* Add a signal to a signal set.  */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on Mac OS X.  */
#  if defined __cplusplus && defined GNULIB_NAMESPACE
#   undef sigaddset
#  endif
# else
_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
                                  _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
_GL_CXXALIASWARN (sigaddset);

/* Remove a signal from a signal set.  */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on Mac OS X.  */
#  if defined __cplusplus && defined GNULIB_NAMESPACE
#   undef sigdelset
#  endif
# else
_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
                                  _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
_GL_CXXALIASWARN (sigdelset);

/* Fill a signal set with all possible signals.  */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on Mac OS X.  */
#  if defined __cplusplus && defined GNULIB_NAMESPACE
#   undef sigfillset
#  endif
# else
_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
_GL_CXXALIASWARN (sigfillset);

/* Return the set of those blocked signals that are pending.  */
# if !@HAVE_POSIX_SIGNALBLOCKING@
_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
_GL_CXXALIASWARN (sigpending);

/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
   Then, if SET is not NULL, affect the current set of blocked signals by
   combining it with *SET as indicated in OPERATION.
   In this implementation, you are not allowed to change a signal handler
   while the signal is blocked.  */
# if !@HAVE_POSIX_SIGNALBLOCKING@
#  define SIG_BLOCK   0  /* blocked_set = blocked_set | *set; */
#  define SIG_SETMASK 1  /* blocked_set = *set; */
#  define SIG_UNBLOCK 2  /* blocked_set = blocked_set & ~*set; */
_GL_FUNCDECL_SYS (sigprocmask, int,
                  (int operation,
                   const sigset_t *restrict set,
                   sigset_t *restrict old_set));
# endif
_GL_CXXALIAS_SYS (sigprocmask, int,
                  (int operation,
                   const sigset_t *restrict set,
                   sigset_t *restrict old_set));
_GL_CXXALIASWARN (sigprocmask);

/* Install the handler FUNC for signal SIG, and return the previous
   handler.  */
# ifdef __cplusplus
extern "C" {
# endif
# if !GNULIB_defined_function_taking_int_returning_void_t
typedef void (*_gl_function_taking_int_returning_void_t) (int);
#  define GNULIB_defined_function_taking_int_returning_void_t 1
# endif
# ifdef __cplusplus
}
# endif
# if !@HAVE_POSIX_SIGNALBLOCKING@
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   define signal rpl_signal
#  endif
_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
                  (int sig, _gl_function_taking_int_returning_void_t func));
_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
                  (int sig, _gl_function_taking_int_returning_void_t func));
# else
/* On OpenBSD, the declaration of 'signal' may not be present at this point,
   because it occurs in <sys/signal.h>, not <signal.h> directly.  */
#  if defined __OpenBSD__
_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t,
                  (int sig, _gl_function_taking_int_returning_void_t func));
#  endif
_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
                  (int sig, _gl_function_taking_int_returning_void_t func));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (signal);
# endif

# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
/* Raise signal SIGPIPE.  */
_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
# endif

#elif defined GNULIB_POSIXCHECK
# undef sigaddset
# if HAVE_RAW_DECL_SIGADDSET
_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigdelset
# if HAVE_RAW_DECL_SIGDELSET
_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigemptyset
# if HAVE_RAW_DECL_SIGEMPTYSET
_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigfillset
# if HAVE_RAW_DECL_SIGFILLSET
_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigismember
# if HAVE_RAW_DECL_SIGISMEMBER
_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigpending
# if HAVE_RAW_DECL_SIGPENDING
_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
# undef sigprocmask
# if HAVE_RAW_DECL_SIGPROCMASK
_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
                 "use the gnulib module sigprocmask for portability");
# endif
#endif /* @GNULIB_SIGPROCMASK@ */


#if @GNULIB_SIGACTION@
# if !@HAVE_SIGACTION@

#  if !@HAVE_SIGINFO_T@

#   if !GNULIB_defined_siginfo_types

/* Present to allow compilation, but unsupported by gnulib.  */
union sigval
{
  int sival_int;
  void *sival_ptr;
};

/* Present to allow compilation, but unsupported by gnulib.  */
struct siginfo_t
{
  int si_signo;
  int si_code;
  int si_errno;
  pid_t si_pid;
  uid_t si_uid;
  void *si_addr;
  int si_status;
  long si_band;
  union sigval si_value;
};
typedef struct siginfo_t siginfo_t;

#    define GNULIB_defined_siginfo_types 1
#   endif

#  endif /* !@HAVE_SIGINFO_T@ */

/* We assume that platforms which lack the sigaction() function also lack
   the 'struct sigaction' type, and vice versa.  */

#  if !GNULIB_defined_struct_sigaction

struct sigaction
{
  union
  {
    void (*_sa_handler) (int);
    /* Present to allow compilation, but unsupported by gnulib.  POSIX
       says that implementations may, but not must, make sa_sigaction
       overlap with sa_handler, but we know of no implementation where
       they do not overlap.  */
    void (*_sa_sigaction) (int, siginfo_t *, void *);
  } _sa_func;
  sigset_t sa_mask;
  /* Not all POSIX flags are supported.  */
  int sa_flags;
};
#   define sa_handler _sa_func._sa_handler
#   define sa_sigaction _sa_func._sa_sigaction
/* Unsupported flags are not present.  */
#   define SA_RESETHAND 1
#   define SA_NODEFER 2
#   define SA_RESTART 4

#   define GNULIB_defined_struct_sigaction 1
#  endif

_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
                                   struct sigaction *restrict));

# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@

#  define sa_sigaction sa_handler

# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */

_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
                                   struct sigaction *restrict));
_GL_CXXALIASWARN (sigaction);

#elif defined GNULIB_POSIXCHECK
# undef sigaction
# if HAVE_RAW_DECL_SIGACTION
_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
                 "use the gnulib module sigaction for portability");
# endif
#endif

/* Some systems don't have SA_NODEFER.  */
#ifndef SA_NODEFER
# define SA_NODEFER 0
#endif


#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif