664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
245 lines
7.2 KiB
C
245 lines
7.2 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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int __sigisempty __P((sigset_t *set));
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int __sigseteq __P((sigset_t *set1, sigset_t *set2));
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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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extern __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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extern __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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