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Viewing changes to ftsh/src/cancel.c

  • Committer: Bazaar Package Importer
  • Author(s): Michael Hanke
  • Date: 2011-05-07 09:05:00 UTC
  • Revision ID: james.westby@ubuntu.com-20110507090500-lqpmdtwndor6e7os
Tags: upstream-3.3.2
Import upstream version 3.3.2

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ftsh/src/cancel.c
 
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/*
 
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Copyright (C) 2003-2004 Douglas Thain and the University of Wisconsin
 
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Copyright (C) 2005- The University of Notre Dame
 
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This software is distributed under the GNU General Public License.
 
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See the file COPYING for details.
 
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*/
 
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#include <signal.h>
 
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#include <unistd.h>
 
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#include <sys/time.h>
 
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#include <time.h>
 
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#include "ftsh_error.h"
 
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#include "stringtools.h"
 
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struct sigaction old_int_handler;
 
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struct sigaction old_hup_handler;
 
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struct sigaction old_quit_handler;
 
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struct sigaction old_term_handler;
 
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static int cancel_signal = 0;
 
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static void cancel_handler( int sig )
 
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{
 
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        ftsh_error(FTSH_ERROR_PROCESS,0,"received signal %d",sig);
 
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        cancel_signal = sig;
 
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}
 
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void cancel_hold()
 
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{
 
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        struct sigaction sa;
 
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        sigset_t ss;
 
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        sigemptyset(&ss);
 
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        sa.sa_handler = cancel_handler;
 
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        sa.sa_mask = ss;
 
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        sa.sa_flags = 0;
 
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        sigaction(SIGINT,&sa,&old_int_handler);
 
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        sigaction(SIGHUP,&sa,&old_hup_handler);
 
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        sigaction(SIGQUIT,&sa,&old_quit_handler);
 
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        sigaction(SIGTERM,&sa,&old_term_handler);
 
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}
 
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void cancel_release()
 
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{
 
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        sigaction(SIGINT,&old_int_handler,0);
 
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        sigaction(SIGHUP,&old_int_handler,0);
 
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        sigaction(SIGQUIT,&old_int_handler,0);
 
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        sigaction(SIGTERM,&old_int_handler,0);
 
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        if(cancel_signal!=0) kill(getpid(),cancel_signal);
 
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}
 
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int cancel_pending()
 
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{
 
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        return cancel_signal!=0;
 
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}
 
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void cancel_reset()
 
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{
 
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        cancel_signal = 0;
 
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}