db/sig.c

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include "libxfs.h"
  20 #include <signal.h>
  21 #include "sig.h"
  22
  23 static int      gotintr;
  24 static sigset_t intrset;
  25
  26 static void
  27 interrupt(int sig, siginfo_t *info, void *uc)
  28 {
  29         gotintr = 1;
  30 }
  31
  32 void
  33 blockint(void)
  34 {
  35         sigprocmask(SIG_BLOCK, &intrset, NULL);
  36 }
  37
  38 void
  39 clearint(void)
  40 {
  41         gotintr = 0;
  42 }
  43
  44 void
  45 init_sig(void)
  46 {
  47         struct sigaction sa;
  48
  49         memset(&sa, 0, sizeof(sa));
  50         sa.sa_sigaction = interrupt;
  51         sigaction(SIGINT, &sa, NULL);
  52         sigemptyset(&intrset);
  53         sigaddset(&intrset, SIGINT);
  54 }
  55
  56 int
  57 seenint(void)
  58 {
  59         return gotintr;
  60 }
  61
  62 void
  63 unblockint(void)
  64 {
  65         sigprocmask(SIG_UNBLOCK, &intrset, NULL);
  66 }