c0388656dc
There were a variety of potential 64b problems due to the complete lack of prototype declarations. So, we add a file, isam_prototypes.h, generated mostly by the 'cproto' tool. We also fixed up some errors that having proper prototypes pointed out, mainly in passing ints where pointers were expected and vice versa. The iserase() function was supposed to accept a char *, but was defined as only accepting a char. Fun stuff like that.
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
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/*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
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/*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
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/*%% (c) Copyright 1993, 1994 Novell, Inc. */
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/*%% $XConsortium: issignals.c /main/3 1995/10/23 11:44:41 rswiston $ */
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*/
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/*
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* issignals.c
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*
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* Description:
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* Signal masking functions
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*/
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#include "isam_impl.h"
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#include <signal.h>
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/*
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* _issignal_mask() is called at the beginning of each ISAM update operation
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* to mask signals for the duration of the operation. _issignals_unmask()
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* is called at the end of the operation to restore the original signal
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* mask.
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*
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* _issignals_cntl() enables/disables this signal masking facility.
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* (the default is "mask the signals").
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*
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* The variable already_masked is used to provide more robustness: it
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* will prevent permanent signal masking due to bugs in the ISAM package.
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* The permanent masking of signals would happen if _issignals_mask()
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* were called twice in a row.
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*/
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static int do_mask = 1; /* default value */
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static int already_masked;
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static sigset_t oldmask;
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static sigset_t allsignals;
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/* opt, 1 will enable masking, 0 will disable masking */
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int _issignals_cntl(int opt)
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{
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int oldmask = do_mask;
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do_mask = opt ? 1 : 0;
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return (oldmask);
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}
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void
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_issignals_mask(void)
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{
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if (do_mask && !already_masked) {
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(void) sigfillset(&allsignals);
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(void) sigdelset(&allsignals, SIGTRAP);
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(void) sigdelset(&allsignals, SIGSEGV);
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(void) sigdelset(&allsignals, SIGILL);
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(void) sigdelset(&allsignals, SIGBUS);
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(void) sigprocmask(SIG_SETMASK, &allsignals, &oldmask);
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already_masked = 1;
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}
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}
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void
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_issignals_unmask(void)
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{
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if (do_mask) {
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(void)sigprocmask(SIG_SETMASK, &oldmask, NULL);
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already_masked = 0;
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}
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}
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