1 /* $OpenBSD: signalvar.h,v 1.54 2022/05/13 15:32:00 claudio Exp $ */ 2 /* $NetBSD: signalvar.h,v 1.17 1996/04/22 01:23:31 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)signalvar.h 8.3 (Berkeley) 1/4/94 33 */ 34 35 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 36 #define _SYS_SIGNALVAR_H_ 37 38 /* 39 * Kernel signal definitions and data structures, 40 * not exported to user programs. 41 */ 42 43 /* 44 * Process signal actions and state, needed only within the process 45 * (not necessarily resident). 46 * 47 * Locks used to protect struct members in struct sigacts: 48 * a atomic operations 49 * m this process' `ps_mtx' 50 */ 51 struct sigacts { 52 sig_t ps_sigact[NSIG]; /* [m] disposition of signals */ 53 sigset_t ps_catchmask[NSIG]; /* [m] signals to be blocked */ 54 sigset_t ps_sigonstack; /* [m] signals to take on sigstack */ 55 sigset_t ps_sigintr; /* [m] signals interrupt syscalls */ 56 sigset_t ps_sigreset; /* [m] signals that reset when caught */ 57 sigset_t ps_siginfo; /* [m] signals that provide siginfo */ 58 sigset_t ps_sigignore; /* [m] signals being ignored */ 59 sigset_t ps_sigcatch; /* [m] signals being caught by user */ 60 int ps_sigflags; /* [a] signal flags, below */ 61 }; 62 63 /* signal flags */ 64 #define SAS_NOCLDSTOP 0x01 /* No SIGCHLD when children stop. */ 65 #define SAS_NOCLDWAIT 0x02 /* No zombies if child dies */ 66 67 /* additional signal action values, used only temporarily/internally */ 68 #define SIG_CATCH (void (*)(int))2 69 #define SIG_HOLD (void (*)(int))3 70 71 /* 72 * Check if process p has an unmasked signal pending. 73 * Return mask of pending signals. 74 */ 75 #define SIGPENDING(p) \ 76 (((p)->p_siglist | (p)->p_p->ps_siglist) & ~(p)->p_sigmask) 77 78 /* 79 * Signal properties and actions. 80 */ 81 #define SA_KILL 0x01 /* terminates process by default */ 82 #define SA_CORE 0x02 /* ditto and coredumps */ 83 #define SA_STOP 0x04 /* suspend process */ 84 #define SA_TTYSTOP 0x08 /* ditto, from tty */ 85 #define SA_IGNORE 0x10 /* ignore by default */ 86 #define SA_CONT 0x20 /* continue if suspended */ 87 #define SA_CANTMASK 0x40 /* non-maskable, catchable */ 88 89 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 90 91 #ifdef _KERNEL 92 enum signal_type { SPROCESS, STHREAD, SPROPAGATED }; 93 94 struct sigio_ref; 95 96 struct sigctx { 97 sig_t sig_action; 98 sigset_t sig_catchmask; 99 int sig_onstack; 100 int sig_intr; 101 int sig_reset; 102 int sig_info; 103 int sig_ignore; 104 int sig_catch; 105 }; 106 107 /* 108 * Machine-independent functions: 109 */ 110 int coredump(struct proc *p); 111 void execsigs(struct proc *p); 112 int cursig(struct proc *p, struct sigctx *); 113 void pgsigio(struct sigio_ref *sir, int sig, int checkctty); 114 void pgsignal(struct pgrp *pgrp, int sig, int checkctty); 115 void psignal(struct proc *p, int sig); 116 void ptsignal(struct proc *p, int sig, enum signal_type type); 117 #define prsignal(pr,sig) ptsignal((pr)->ps_mainproc, (sig), SPROCESS) 118 void trapsignal(struct proc *p, int sig, u_long code, int type, 119 union sigval val); 120 __dead void sigexit(struct proc *, int); 121 void sigabort(struct proc *); 122 int sigismasked(struct proc *, int); 123 int sigonstack(size_t); 124 int killpg1(struct proc *, int, int, int); 125 126 void signal_init(void); 127 128 void sigstkinit(struct sigaltstack *); 129 struct sigacts *sigactsinit(struct process *); 130 void sigactsfree(struct sigacts *); 131 void siginit(struct sigacts *); 132 133 /* 134 * Machine-dependent functions: 135 */ 136 int sendsig(sig_t _catcher, int _sig, sigset_t _mask, const siginfo_t *_si, 137 int _info, int _onstack); 138 #endif /* _KERNEL */ 139 #endif /* !_SYS_SIGNALVAR_H_ */ 140