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/*
* cook - file construction tool
* Copyright (C) 1997, 1998 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate desists
*/
#include <signal.h>
#include <ac/string.h>
#include <desist.h>
#include <error_intl.h>
#include <os.h>
#include <star.h>
static int desist_flag;
/*
* NAME
* interrupt - handle interrupts by signals
*
* SYNOPSIS
* void interrupt(int);
*
* DESCRIPTION
* The interrupt function is used to set the appropriate flags when an
* interrupt occurs.
*
* RETURNS
* void
*
* CAVEAT
* Don't use too extravagantly, because it just returns!
*/
static RETSIGTYPE interrupt _((int));
static RETSIGTYPE
interrupt(n)
int n;
{
sub_context_ty *scp;
star_eoln();
desist_flag++;
scp = sub_context_new();
sub_var_set(scp, "Name", "%s", strsignal(n));
error_intl(scp, i18n("interrupted by $name"));
sub_context_delete(scp);
signal(n, interrupt);
}
/*
* NAME
* desist_requested
*
* SYNOPSIS
* int desist_requested(void);
*
* DESCRIPTION
* The desist_requested function is used to test whether the user
* has requested that we deist by sending an interrupt.
*/
int
desist_requested()
{
int result;
result = (desist_flag != 0);
desist_flag = 0;
return result;
}
/*
* NAME
* desist_enable
*
* SYNOPSIS
* void desist_enable(void);
*
* DESCRIPTION
* The desist_enable function is used to set the signal handlers
* which will trap user desist requests.
*/
void
desist_enable()
{
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, interrupt);
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, interrupt);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
signal(SIGQUIT, interrupt);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, interrupt);
}
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