156 lines
3.3 KiB
C
156 lines
3.3 KiB
C
/*
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* Copyright (c) 2001 Todd C. Miller <Todd.Miller@courtesan.com>
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* 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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*
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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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*
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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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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* 4. Products derived from this software may not be called "Sudo" nor
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* may "Sudo" appear in their names without specific prior written
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* permission from the author.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <signal.h>
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#include <errno.h>
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#include <compat.h>
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#ifndef lint
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static const char rcsid[] = "$Sudo$";
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#endif /* lint */
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int
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sigaction(signo, sa, osa)
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int signo;
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const sigaction_t *sa;
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sigaction_t *osa;
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{
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sigaction_t nsa;
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int error;
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/* We must reverse SV_INTERRUPT since it is the opposite of SA_RESTART */
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if (sa) {
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nsa = *sa;
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nsa.sa_flags ^= SV_INTERRUPT;
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sa = &nsa;
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}
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error = sigvec(signo, sa, osa);
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if (!error && osa)
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osa->sa_flags ^= SV_INTERRUPT; /* flip SV_INTERRUPT as above */
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return(error);
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}
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int
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sigemptyset(set)
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sigset_t *set;
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{
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*set = 0;
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return(0);
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}
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int
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sigfillset(set)
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sigset_t *set;
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{
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*set = ~0;;
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return(0);
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}
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int
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sigaddset(set, signo)
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sigset_t *set;
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int signo;
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{
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if (signo <= 0 || signo >= NSIG) {
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errno = EINVAL;
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return(-1);
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}
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*set |= sigmask(signo);
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return(0);
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}
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int
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sigdelset(set, signo)
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sigset_t *set;
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int signo;
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{
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if (signo <= 0 || signo >= NSIG) {
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errno = EINVAL;
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return(-1);
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}
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*set &= ~(sigmask(signo));
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return(0);
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}
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int
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sigismember(set, signo)
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sigset_t *set;
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int signo;
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{
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return(*set & sigmask(signo));
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}
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int
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sigprocmask(how, set, oset)
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int how;
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const sigset_t *set;
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sigset_t *oset;
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{
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int mask;
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/* If 'set' is NULL the user just wants the current signal mask. */
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if (set == 0)
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mask = sigblock(0);
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else
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switch (how) {
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case SIG_BLOCK:
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mask = sigblock(*set);
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break;
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case SIG_UNBLOCK:
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mask = sigsetmask(~*set);
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break;
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case SIG_SETMASK:
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mask = sigsetmask(*set);
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break;
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default:
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return(-1);
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}
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if (mask == -1)
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return(-1);
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if (oset)
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*oset = mask;
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return(0);
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}
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