suricata
util-signal.c
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1 /* Copyright (C) 2007-2012 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Anoop Saldanha <anoopsaldanha@gmail.com>
22  */
23 
24 #include "suricata-common.h"
25 #include "suricata.h"
26 #include "util-debug.h"
27 #include "util-signal.h"
28 
29 int UtilSignalBlock(int signum)
30 {
31 #ifndef OS_WIN32
32  sigset_t x;
33  if (sigemptyset(&x) < 0)
34  return -1;
35  if (sigaddset(&x, signum) < 0)
36  return -1;
37  /* don't use sigprocmask(), as it's undefined for
38  * multithreaded programs. Use phtread_sigmask().
39  */
40  if (pthread_sigmask(SIG_BLOCK, &x, NULL) != 0)
41  return -1;
42 #endif
43  return 0;
44 }
45 
46 int UtilSignalUnblock(int signum)
47 {
48 #ifndef OS_WIN32
49  sigset_t x;
50  if (sigemptyset(&x) < 0)
51  return -1;
52  if (sigaddset(&x, signum) < 0)
53  return -1;
54  if (pthread_sigmask(SIG_UNBLOCK, &x, NULL) != 0)
55  return -1;
56 #endif
57  return 0;
58 }
59 
60 void UtilSignalHandlerSetup(int sig, void (*handler)(int))
61 {
62 #ifdef OS_WIN32
63  signal(sig, handler);
64 #else
65  struct sigaction action;
66  memset(&action, 0x00, sizeof(struct sigaction));
67 
68  action.sa_handler = handler;
69  sigemptyset(&(action.sa_mask));
70  sigaddset(&(action.sa_mask),sig);
71  action.sa_flags = 0;
72  sigaction(sig, &action, 0);
73 #endif /* OS_WIN32 */
74 
75  return;
76 }
77 
78 #if 0
79 int UtilSignalIsHandler(int sig, void (*handler)(int))
80 {
81  struct sigaction action;
82  memset(&action, 0x00, sizeof(struct sigaction));
83 
84  sigaction(sig, NULL, &action);
85 
86  return (action.sa_handler == handler);
87 }
88 #endif
int UtilSignalUnblock(int signum)
Definition: util-signal.c:46
int UtilSignalBlock(int signum)
Definition: util-signal.c:29
void UtilSignalHandlerSetup(int sig, void(*handler)(int))
Definition: util-signal.c:60