1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/* the Music Player Daemon (MPD)
* (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
* (c) 2004 Nick Welch (mack@incise.org)
* This project's homepage is: http://www.musicpd.org
*
* 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 02111-1307 USA
*/
#include "sig_handlers.h"
#include "player.h"
#include "playlist.h"
#include "directory.h"
#include "command.h"
#include "signal_check.h"
#include "log.h"
#include "player.h"
#include <signal.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <errno.h>
int handlePendingSignals() {
if(signal_is_pending(SIGINT) || signal_is_pending(SIGTERM)) {
DEBUG("got SIGINT or SIGTERM, exiting\n");
return COMMAND_RETURN_KILL;
}
if(signal_is_pending(SIGHUP)) {
DEBUG("got SIGHUP, rereading DB\n");
signal_clear(SIGHUP);
if(!isUpdatingDB()) {
readDirectoryDB();
incrPlaylistVersion();
}
if(myfprintfCloseAndOpenLogFile()<0) return COMMAND_RETURN_KILL;
playerCycleLogFiles();
}
return 0;
}
void chldSigHandler(int signal) {
int status;
int pid;
DEBUG("got SIGCHLD\n");
while(0 != (pid = wait3(&status,WNOHANG,NULL))) {
if(pid<0) {
if(errno==EINTR) continue;
else break;
}
player_sigChldHandler(pid,status);
directory_sigChldHandler(pid,status);
}
}
void initSigHandlers() {
struct sigaction sa;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sa.sa_handler = SIG_IGN;
while(sigaction(SIGPIPE,&sa,NULL)<0 && errno==EINTR);
sa.sa_handler = chldSigHandler;
while(sigaction(SIGCHLD,&sa,NULL)<0 && errno==EINTR);
signal_handle(SIGUSR1);
signal_handle(SIGINT);
signal_handle(SIGTERM);
signal_handle(SIGHUP);
}
void finishSigHandlers() {
signal_unhandle(SIGINT);
signal_unhandle(SIGUSR1);
signal_unhandle(SIGTERM);
signal_unhandle(SIGHUP);
}
void ignoreSignals() {
struct sigaction sa;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sa.sa_handler = SIG_IGN;
while(sigaction(SIGPIPE,&sa,NULL)<0 && errno==EINTR);
while(sigaction(SIGCHLD,&sa,NULL)<0 && errno==EINTR);
while(sigaction(SIGUSR1,&sa,NULL)<0 && errno==EINTR);
while(sigaction(SIGINT,&sa,NULL)<0 && errno==EINTR);
while(sigaction(SIGTERM,&sa,NULL)<0 && errno==EINTR);
while(sigaction(SIGHUP,&sa,NULL)<0 && errno==EINTR);
}
void blockSignals() {
sigset_t sset;
sigemptyset(&sset);
sigaddset(&sset,SIGCHLD);
sigaddset(&sset,SIGUSR1);
sigaddset(&sset,SIGHUP);
sigaddset(&sset,SIGINT);
sigaddset(&sset,SIGTERM);
while(sigprocmask(SIG_BLOCK,&sset,NULL)<0 && errno==EINTR);
}
void unblockSignals() {
sigset_t sset;
sigemptyset(&sset);
sigaddset(&sset,SIGCHLD);
sigaddset(&sset,SIGUSR1);
sigaddset(&sset,SIGHUP);
sigaddset(&sset,SIGINT);
sigaddset(&sset,SIGTERM);
while(sigprocmask(SIG_UNBLOCK,&sset,NULL)<0 && errno==EINTR);
}
/* vim:set shiftwidth=4 tabstop=8 expandtab: */
|
