1 |
#include <iostream> |
#include <iostream> |
2 |
|
#include <sstream> |
3 |
#include <signal.h> |
#include <signal.h> |
4 |
#include <fcntl.h> |
#include <fcntl.h> |
5 |
#include <stdlib.h> |
#include <stdlib.h> |
6 |
#include <cstring> |
#include <cstring> |
7 |
|
|
8 |
|
#include <sys/types.h> |
9 |
|
#include <pwd.h> |
10 |
|
#include <grp.h> |
11 |
|
|
12 |
|
|
13 |
|
#include "ConfigFile.h" |
14 |
#include "daemon.h" |
#include "daemon.h" |
15 |
#include "common.h" |
#include "Common.h" |
16 |
|
#include "Logger.h" |
17 |
|
|
18 |
|
|
19 |
|
|
20 |
using namespace std; |
using namespace std; |
21 |
|
|
22 |
|
|
23 |
void signal_handler(int sig) |
void signal_handler(int sig) |
24 |
{ |
{ |
25 |
switch(sig) { |
switch (sig) |
26 |
case SIGHUP: |
{ |
27 |
Common::instance()->logMessage("hangup signal catched"); |
case SIGHUP: |
28 |
break; |
Logger::logMessage("Reload config"); |
29 |
|
Common::instance()->reloadConfig = true; |
30 |
case SIGTERM: |
|
31 |
Common::instance()->logMessage("terminate signal catched...exiting"); |
break; |
32 |
Common::instance()->mainContinue = false; |
|
33 |
break; |
case SIGTERM: |
34 |
|
Logger::logMessage("terminate signal catched...exiting"); |
35 |
|
Common::instance()->mainContinue = false; |
36 |
|
break; |
37 |
|
default: |
38 |
|
std::stringstream ss; |
39 |
|
ss << "Received unknown signal: " << sig; |
40 |
|
Logger::logMessage(ss.str()); |
41 |
|
break; |
42 |
} |
} |
43 |
} |
} |
44 |
|
|
45 |
|
void lookup_uid_values() |
46 |
|
{ |
47 |
|
Common* cmn = Common::instance(); |
48 |
|
|
49 |
|
std::string userstr = cmn->GetConfigfile()->GetValue("smsdaemon","user",""); |
50 |
|
std::string groupstr = cmn->GetConfigfile()->GetValue("smsdaemon","group",""); |
51 |
|
|
52 |
|
passwd* pass = getpwnam(userstr.c_str()); |
53 |
|
if (pass != 0) |
54 |
|
{ |
55 |
|
cmn->uid = pass->pw_uid; |
56 |
|
} |
57 |
|
else |
58 |
|
{ |
59 |
|
Logger::logMessage( string("could not lookup userid: ") + userstr ); |
60 |
|
exit(1); |
61 |
|
} |
62 |
|
|
63 |
|
|
64 |
|
group* grp = getgrnam(groupstr.c_str() ); |
65 |
|
if (grp != 0) |
66 |
|
{ |
67 |
|
cmn->gid = grp->gr_gid; |
68 |
|
} |
69 |
|
else |
70 |
|
{ |
71 |
|
Logger::logMessage( string("could not lookup groupid: ") + groupstr ); |
72 |
|
exit(1); |
73 |
|
} |
74 |
|
} |
75 |
|
|
76 |
|
|
77 |
void daemonCleanup() |
void daemonCleanup() |
78 |
{ |
{ |
79 |
unlink( Common::instance()->pidfile.c_str() ); |
Common* cmn = Common::instance(); |
80 |
|
Logger::logMessage("Cleaning up daemon"); |
81 |
|
|
82 |
|
seteuid(0); |
83 |
|
setegid(0); |
84 |
|
unlink( cmn->pidfile.c_str() ); |
85 |
|
|
86 |
} |
} |
87 |
|
|
88 |
void daemonize() |
void daemonize() |
89 |
{ |
{ |
90 |
int i, lfp; |
int i, lfp; |
91 |
char str[10]; |
char str[10]; |
92 |
Common* cmn = Common::instance(); |
Common* cmn = Common::instance(); |
97 |
daemon_shutdown(0); |
daemon_shutdown(0); |
98 |
} |
} |
99 |
|
|
100 |
|
|
101 |
if (getppid() == 1) /* already a daemon */ |
if (getppid() == 1) /* already a daemon */ |
102 |
return; |
return; |
103 |
|
|
104 |
i=fork(); |
i=fork(); |
105 |
|
|
106 |
if (i<0) /* fork error */ |
if (i<0) /* fork error */ |
107 |
daemon_shutdown(FORK_ERROR); |
daemon_shutdown(FORK_ERROR); |
108 |
if (i>0) /* parent exits */ |
if (i>0) /* parent exits */ |
109 |
daemon_shutdown(0); |
daemon_shutdown(0); |
110 |
/* child daemon continues */ |
/* child daemon continues */ |
111 |
|
|
112 |
setsid(); /* obtain a new process group */ |
setsid(); /* obtain a new process group */ |
113 |
|
|
114 |
for (i=getdtablesize(); i>=0; --i) |
for (i=getdtablesize(); i>=0; --i) |
115 |
close(i); /*close all descriptors*/ |
close(i); /*close all descriptors*/ |
116 |
|
|
117 |
i=open("/dev/null", O_RDWR); /* handle std. io */ |
i=open("/dev/null", O_RDWR); /* handle std. io */ |
|
dup(i); |
|
118 |
dup(i); |
dup(i); |
119 |
|
dup(i); |
120 |
|
|
121 |
umask(027); /* set newly created file permissions */ |
umask(027); /* set newly created file permissions */ |
122 |
|
|
123 |
chdir("/tmp"); /* change running directory*/ |
chdir("/tmp"); /* change running directory*/ |
124 |
|
|
125 |
/*attempt to create lockfile and put a file-lock on it*/ |
/*attempt to create lockfile and put a file-lock on it*/ |
126 |
lfp=open(cmn->pidfile.c_str(), O_RDWR|O_CREAT, 0640); |
lfp=open(cmn->pidfile.c_str(), O_RDWR|O_CREAT, 0640); |
127 |
if (lfp<0) /* can not open */ |
if (lfp<0) /* can not open */ |
128 |
daemon_shutdown(CANT_OPEN_LOCK); |
daemon_shutdown(CANT_OPEN_LOCK); |
129 |
if (lockf(lfp,F_TLOCK,0) < 0) /* can not lock */ |
if (lockf(lfp,F_TLOCK,0) < 0) /* can not lock */ |
130 |
daemon_shutdown(ALREADY_LOCKED); |
daemon_shutdown(ALREADY_LOCKED); |
131 |
|
|
132 |
/* first instance continues */ |
/* first instance continues */ |
133 |
sprintf(str, "%d\n", getpid() ); /* record pid to lockfile */ |
sprintf(str, "%d\n", getpid() ); /* record pid to lockfile */ |
134 |
write(lfp, str, strlen(str) ); |
write(lfp, str, strlen(str) ); |
137 |
signal(SIGTTOU, SIG_IGN); |
signal(SIGTTOU, SIG_IGN); |
138 |
signal(SIGTTIN, SIG_IGN); |
signal(SIGTTIN, SIG_IGN); |
139 |
signal(SIGHUP, signal_handler); /* catch hangup signal */ |
signal(SIGHUP, signal_handler); /* catch hangup signal */ |
140 |
signal(SIGTERM, signal_handler); /* catch kill signal */ |
signal(SIGTERM, signal_handler); /* catch kill signal */ |
141 |
|
signal(SIGINT, signal_handler); /* keyboard interrupt */ |
142 |
|
signal(SIGQUIT, signal_handler); /* QUIT */ |
143 |
|
|
144 |
/*this program is now a daemon*/ |
/*this program is now a daemon*/ |
145 |
setegid( cmn->gid ); |
setegid( cmn->gid ); |