1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #ifndef _SYS_SIGNAL_H
41 #define _SYS_SIGNAL_H
42
43 #include <sys/feature_tests.h>
44 #include <sys/iso/signal_iso.h>
45
46 #ifdef __cplusplus
47 extern "C" {
48 #endif
49
50 #if defined(__EXTENSIONS__) || defined(_KERNEL) || !defined(_STRICT_STDC) || \
51 defined(__XOPEN_OR_POSIX)
52
53 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
54 (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
55 (_POSIX_C_SOURCE > 2) || defined(_XPG4_2)
56 /*
57 * We need <sys/siginfo.h> for the declaration of siginfo_t.
58 */
59 #include <sys/siginfo.h>
60 #endif
61
62 /* Duplicated in <sys/ucontext.h> as a result of XPG4v2 requirements */
63 #ifndef _SIGSET_T
64 #define _SIGSET_T
65 typedef struct { /* signal set type */
66 unsigned int __sigbits[4];
67 } sigset_t;
68 #endif /* _SIGSET_T */
69
70 typedef struct {
71 unsigned int __sigbits[3];
72 } k_sigset_t;
73
74 /*
75 * The signal handler routine can have either one or three arguments.
76 * Existing C code has used either form so not specifing the arguments
77 * neatly finesses the problem. C++ doesn't accept this. To C++
78 * "(*sa_handler)()" indicates a routine with no arguments (ANSI C would
79 * specify this as "(*sa_handler)(void)"). One or the other form must be
80 * used for C++ and the only logical choice is "(*sa_handler)(int)" to allow
81 * the SIG_* defines to work. "(*sa_sigaction)(int, siginfo_t *, void *)"
82 * can be used for the three argument form.
83 */
84
85 /*
86 * Note: storage overlap by sa_handler and sa_sigaction
87 */
88 struct sigaction {
89 int sa_flags;
90 union {
91 #ifdef __cplusplus
92 void (*_handler)(int);
93 #else
94 void (*_handler)();
95 #endif
96 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
97 (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
98 (_POSIX_C_SOURCE > 2) || defined(_XPG4_2)
99 void (*_sigaction)(int, siginfo_t *, void *);
100 #endif
101 } _funcptr;
102 sigset_t sa_mask;
103 #ifndef _LP64
104 int sa_resv[2];
105 #endif
106 };
107 #define sa_handler _funcptr._handler
108 #define sa_sigaction _funcptr._sigaction
109
110 #if defined(_SYSCALL32)
111
112 /* Kernel view of the ILP32 user sigaction structure */
113
114 struct sigaction32 {
115 int32_t sa_flags;
116 union {
117 caddr32_t _handler;
118 caddr32_t _sigaction;
119 } _funcptr;
120 sigset_t sa_mask;
121 int32_t sa_resv[2];
122 };
123
124 #endif /* _SYSCALL32 */
125
126 /* this is only valid for SIGCLD */
127 #define SA_NOCLDSTOP 0x00020000 /* don't send job control SIGCLD's */
128 #endif
129
130 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
131 (!defined(_STRICT_STDC) && !defined(_POSIX_C_SOURCE)) || \
132 defined(_XPG4_2)
133
134 /* non-conformant ANSI compilation */
135
136 /* definitions for the sa_flags field */
137 #define SA_ONSTACK 0x00000001
138 #define SA_RESETHAND 0x00000002
139 #define SA_RESTART 0x00000004
140 #endif
141
142 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
143 (!defined(_STRICT_STDC) && !defined(_POSIX_C_SOURCE)) || \
144 (_POSIX_C_SOURCE > 2) || defined(_XPG4_2)
145 #define SA_SIGINFO 0x00000008
146 #endif
147
148 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
149 (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
150 defined(_XPG4_2)
151 #define SA_NODEFER 0x00000010
152
153 /* this is only valid for SIGCLD */
154 #define SA_NOCLDWAIT 0x00010000 /* don't save zombie children */
155
156 #if defined(__EXTENSIONS__) || !defined(_XPG4_2)
157 /*
158 * use of these symbols by applications is injurious
159 * to binary compatibility
160 */
161 #define NSIG 73 /* valid signals range from 1 to NSIG-1 */
162 #define MAXSIG 72 /* size of u_signal[], NSIG-1 <= MAXSIG */
163 #endif /* defined(__EXTENSIONS__) || !defined(_XPG4_2) */
164
165 #define MINSIGSTKSZ 2048
166 #define SIGSTKSZ 8192
167
168 #define SS_ONSTACK 0x00000001
169 #define SS_DISABLE 0x00000002
170
171 /* Duplicated in <sys/ucontext.h> as a result of XPG4v2 requirements. */
172 #ifndef _STACK_T
173 #define _STACK_T
174 #if defined(__EXTENSIONS__) || !defined(_XPG4_2)
175 typedef struct sigaltstack {
176 #else
177 typedef struct {
178 #endif
179 void *ss_sp;
180 size_t ss_size;
181 int ss_flags;
182 } stack_t;
183
184 #if defined(_SYSCALL32)
185
186 /* Kernel view of the ILP32 user sigaltstack structure */
187
188 typedef struct sigaltstack32 {
189 caddr32_t ss_sp;
190 size32_t ss_size;
191 int32_t ss_flags;
192 } stack32_t;
193
194 #endif /* _SYSCALL32 */
195
196 #endif /* _STACK_T */
197
198 #endif /* defined(__EXTENSIONS__) || defined(_KERNEL) ... */
199
200 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
201 (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))
202
203 /* signotify id used only by libc for mq_notify()/aio_notify() */
204 typedef struct signotify_id { /* signotify id struct */
205 pid_t sn_pid; /* pid of proc to be notified */
206 int sn_index; /* index in preallocated pool */
207 int sn_pad; /* reserved */
208 } signotify_id_t;
209
210 #if defined(_SYSCALL32)
211
212 /* Kernel view of the ILP32 user signotify_id structure */
213
214 typedef struct signotify32_id {
215 pid32_t sn_pid; /* pid of proc to be notified */
216 int32_t sn_index; /* index in preallocated pool */
217 int32_t sn_pad; /* reserved */
218 } signotify32_id_t;
219
220 #endif /* _SYSCALL32 */
221
222 /* Command codes for sig_notify call */
223
224 #define SN_PROC 1 /* queue signotify for process */
225 #define SN_CANCEL 2 /* cancel the queued signotify */
226 #define SN_SEND 3 /* send the notified signal */
227
228 #endif /* defined(__EXTENSIONS__) || defined(_KERNEL) ... */
229
230 /* Added as per XPG4v2 */
231 #if defined(__EXTENSIONS__) || defined(_KERNEL) || \
232 (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
233 defined(_XPG4_2)
234 struct sigstack {
235 void *ss_sp;
236 int ss_onstack;
237 };
238 #endif /* defined(__EXTENSIONS__) || defined(_KERNEL) ... */
239
240 /*
241 * For definition of ucontext_t; must follow struct definition
242 * for sigset_t
243 */
244 #if defined(_XPG4_2)
245 #include <sys/ucontext.h>
246 #endif /* defined(_XPG4_2) */
247
248 #ifdef _KERNEL
249 #include <sys/t_lock.h>
250
251 extern const k_sigset_t nullsmask; /* a null signal mask */
252 extern const k_sigset_t fillset; /* all signals, guaranteed contiguous */
253 extern const k_sigset_t cantmask; /* cannot be caught or ignored */
254 extern const k_sigset_t cantreset; /* cannot be reset after catching */
255 extern const k_sigset_t ignoredefault; /* ignored by default */
256 extern const k_sigset_t stopdefault; /* stop by default */
257 extern const k_sigset_t coredefault; /* dumps core by default */
258 extern const k_sigset_t holdvfork; /* held while doing vfork */
259
260 #define sigmask(n) ((unsigned int)1 << (((n) - 1) & (32 - 1)))
261 #define sigword(n) (((unsigned int)((n) - 1))>>5)
262
263 #if ((MAXSIG > (2 * 32)) && (MAXSIG <= (3 * 32)))
264 #define FILLSET0 0xffffffffu
265 #define FILLSET1 0xffffffffu
266 #define FILLSET2 ((1u << (MAXSIG - 64)) - 1)
267 #else
268 #error "fix me: MAXSIG out of bounds"
269 #endif
270
271 #define CANTMASK0 (sigmask(SIGKILL)|sigmask(SIGSTOP))
272 #define CANTMASK1 0
273 #define CANTMASK2 0
274
275 #define sigemptyset(s) (*(s) = nullsmask)
276 #define sigfillset(s) (*(s) = fillset)
277 #define sigaddset(s, n) ((s)->__sigbits[sigword(n)] |= sigmask(n))
278 #define sigdelset(s, n) ((s)->__sigbits[sigword(n)] &= ~sigmask(n))
279 #define sigismember(s, n) (sigmask(n) & (s)->__sigbits[sigword(n)])
280 #define sigisempty(s) (!((s)->__sigbits[0] | (s)->__sigbits[1] | \
281 (s)->__sigbits[2]))
282 #define sigutok(us, ks) \
283 ((ks)->__sigbits[0] = (us)->__sigbits[0] & (FILLSET0 & ~CANTMASK0), \
284 (ks)->__sigbits[1] = (us)->__sigbits[1] & (FILLSET1 & ~CANTMASK1), \
285 (ks)->__sigbits[2] = (us)->__sigbits[2] & (FILLSET2 & ~CANTMASK2))
286 #define sigktou(ks, us) ((us)->__sigbits[0] = (ks)->__sigbits[0], \
287 (us)->__sigbits[1] = (ks)->__sigbits[1], \
288 (us)->__sigbits[2] = (ks)->__sigbits[2], \
289 (us)->__sigbits[3] = 0)
290 typedef struct {
291 int sig; /* signal no. */
292 int perm; /* flag for EPERM */
293 int checkperm; /* check perm or not */
294 int sicode; /* has siginfo.si_code */
295 union sigval value; /* user specified value */
296 } sigsend_t;
297
298 typedef struct {
299 sigqueue_t sn_sigq; /* sigq struct for notification */
300 u_longlong_t sn_snid; /* unique id for notification */
301 } signotifyq_t;
302
303 typedef struct sigqhdr { /* sigqueue pool header */
304 sigqueue_t *sqb_free; /* free sigq struct list */
305 int sqb_count; /* sigq free count */
306 uint_t sqb_maxcount; /* sigq max free count */
307 size_t sqb_size; /* size of header+free structs */
308 uchar_t sqb_pexited; /* process has exited */
309 uint_t sqb_sent; /* number of sigq sent */
310 kcondvar_t sqb_cv; /* waiting for a sigq struct */
311 kmutex_t sqb_lock; /* lock for sigq pool */
312 } sigqhdr_t;
313
314 #define _SIGQUEUE_SIZE_BASIC 128 /* basic limit */
315 #define _SIGQUEUE_SIZE_PRIVILEGED 512 /* privileged limit */
316 #define _SIGQUEUE_SIZE_MAX 8192 /* maximum limit */
317
318 #define _SIGNOTIFY_MAX 32
319
320 extern void setsigact(int, void (*)(int), const k_sigset_t *, int);
321 extern void sigorset(k_sigset_t *, const k_sigset_t *);
322 extern void sigandset(k_sigset_t *, const k_sigset_t *);
323 extern void sigdiffset(k_sigset_t *, const k_sigset_t *);
324 extern void sigintr(k_sigset_t *, int);
325 extern void sigunintr(k_sigset_t *);
326 extern void sigreplace(k_sigset_t *, k_sigset_t *);
327
328 extern int kill(pid_t, int);
329
330 #endif /* _KERNEL */
331
332 #ifdef __cplusplus
333 }
334 #endif
335
336 #endif /* _SYS_SIGNAL_H */