243 lines
7.1 KiB
C
243 lines
7.1 KiB
C
/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)signalvar.h 8.6 (Berkeley) 2/19/95
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* $FreeBSD$
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*/
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#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
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#define _SYS_SIGNALVAR_H_
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#include <sys/signal.h>
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#include <sys/proc.h>
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/*
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* Kernel signal definitions and data structures,
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* not exported to user programs.
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*/
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/*
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* Process signal actions and state, needed only within the process
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* (not necessarily resident).
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*/
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struct sigacts {
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sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */
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sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */
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sigset_t ps_sigonstack; /* signals to take on sigstack */
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sigset_t ps_sigintr; /* signals that interrupt syscalls */
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sigset_t ps_sigreset; /* signals that reset when caught */
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sigset_t ps_signodefer; /* signals not masked while handled */
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sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
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sigset_t ps_osigset; /* signals that use osigset_t */
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sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
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};
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/*
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* Compatibility.
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*/
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typedef struct {
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struct osigcontext si_sc;
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int si_signo;
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int si_code;
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union sigval si_value;
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} osiginfo_t;
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struct osigaction {
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union {
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void (*__sa_handler) __P((int));
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void (*__sa_sigaction) __P((int, osiginfo_t *, void *));
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} __sigaction_u; /* signal handler */
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osigset_t sa_mask; /* signal mask to apply */
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int sa_flags; /* see signal options below */
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};
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typedef void __osiginfohandler_t __P((int, osiginfo_t *, void *));
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/* additional signal action values, used only temporarily/internally */
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#define SIG_CATCH ((__sighandler_t *)2)
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#define SIG_HOLD ((__sighandler_t *)3)
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/*
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* get signal action for process and signal; currently only for current process
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*/
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#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
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/*
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* sigset_t manipulation macros
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*/
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#define SIGADDSET(set, signo) \
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(set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
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#define SIGDELSET(set, signo) \
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(set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
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#define SIGEMPTYSET(set) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set).__bits[__i] = 0; \
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} while (0)
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#define SIGFILLSET(set) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set).__bits[__i] = ~(unsigned int)0; \
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} while (0)
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#define SIGISMEMBER(set, signo) \
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((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
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#define SIGISEMPTY(set) __sigisempty(&(set))
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#define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
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#define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
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#define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
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#define SIGSETOR(set1, set2) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set1).__bits[__i] |= (set2).__bits[__i]; \
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} while (0)
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#define SIGSETAND(set1, set2) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set1).__bits[__i] &= (set2).__bits[__i]; \
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} while (0)
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#define SIGSETNAND(set1, set2) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set1).__bits[__i] &= ~(set2).__bits[__i]; \
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} while (0)
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#define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
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#define SIGSETOLD(set, oset) ((set).__bits[0] = (oset))
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#define SIG_CANTMASK(set) \
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SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
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#define SIG_STOPSIGMASK(set) \
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SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
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SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
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#define SIG_CONTSIGMASK(set) \
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SIGDELSET(set, SIGCONT)
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#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
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#define SIG2OSIG(sig, osig) osig = (sig).__bits[0]
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#define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
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static __inline int
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__sigisempty(sigset_t *set)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++) {
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if (set->__bits[i])
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return (0);
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}
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return (1);
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}
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static __inline int
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__sigseteq(sigset_t *set1, sigset_t *set2)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++) {
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if (set1->__bits[i] != set2->__bits[i])
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return (0);
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}
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return (1);
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}
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#ifdef _KERNEL
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struct pgrp;
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struct proc;
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struct sigio;
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extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
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/*
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* Machine-independent functions:
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*/
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void check_sigacts __P((void));
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void execsigs __P((struct proc *p));
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void gsignal __P((int pgid, int sig));
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int issignal __P((struct proc *p));
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void killproc __P((struct proc *p, char *why));
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void pgsigio __P((struct sigio *, int signum, int checkctty));
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void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
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void postsig __P((int sig));
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void psignal __P((struct proc *p, int sig));
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void sigexit __P((struct proc *p, int signum));
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void siginit __P((struct proc *p));
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void trapsignal __P((struct proc *p, int sig, u_long code));
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int __cursig __P((struct proc *p));
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/*
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* Machine-dependent functions:
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*/
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void sendsig __P((sig_t action, int sig, sigset_t *retmask, u_long code));
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/*
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* Inline functions:
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*/
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#define CURSIG(p) __cursig(p)
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/*
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* Determine signal that should be delivered to process p, the current
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* process, 0 if none. If there is a pending stop signal with default
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* action, the process stops in issignal().
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*/
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extern __inline int __cursig(struct proc *p)
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{
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sigset_t tmpset;
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tmpset = p->p_siglist;
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SIGSETNAND(tmpset, p->p_sigmask);
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return ((SIGISEMPTY(p->p_siglist) ||
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(!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset)))
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? 0 : issignal(p));
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}
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#endif /* _KERNEL */
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#endif /* !_SYS_SIGNALVAR_H_ */
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