1: #include "global.h"
2: #include "rtlm.h"
3: #include "utils.h"
4: #include "daemon.h"
5:
6:
7: sl_config cfg;
8: sched_root_task_t *root;
9: extern char compiled[], compiledby[], compilehost[];
10: static char szCfgName[MAXPATHLEN];
11: int Verbose, Kill;
12:
13:
14: static void
15: Usage(void)
16: {
17: printf( " -= MQTT Broker =- MQTT Service from ELWIX\n"
18: "=== %s@%s === Compiled: %s ===\n\n"
19: "\t-c <config>\tService config\n"
20: "\t-b\t\tBatch mode\n"
21: "\t-v\t\tVerbose (more -vvv, more verbose)\n"
22: "\t-h\t\tHelp! This screen\n\n",
23: compiledby, compilehost, compiled);
24: }
25:
26: static void
27: sigHand(int sig)
28: {
29: int stat;
30:
31: switch (sig) {
32: case SIGHUP:
33: UnloadConfig(&cfg);
34: if (!LoadConfig(szCfgName, &cfg)) {
35: VERB(1) syslog(LOG_DEBUG, "Config reload OK!");
36: break;
37: }
38:
39: syslog(LOG_ERR, "Error:: can't reload #%d - %s", cfg_GetErrno(), cfg_GetError());
40: case SIGTERM:
41: VERB(1) syslog(LOG_DEBUG, "Terminate MQTT service in progress");
42: Kill++;
43: break;
44: case SIGCHLD:
45: while (waitpid(-1, &stat, WNOHANG) > 0);
46: break;
47: }
48: }
49:
50:
51: int
52: main(int argc, char **argv)
53: {
54: char ch, batch = 0, szStr[STRSIZ];
55: register int i;
56: sqlite3 *acc = NULL, *pub = NULL;
57: FILE *logg = NULL;
58: int sock = -1, ret = 0;
59: struct passwd *pass;
60: struct sigaction sa;
61:
62: strlcpy(szCfgName, DEFAULT_CONFIG, sizeof szCfgName);
63: while ((ch = getopt(argc, argv, "hvbc:")) != -1)
64: switch (ch) {
65: case 'c':
66: strlcpy(szCfgName, optarg, sizeof szCfgName);
67: break;
68: case 'b':
69: batch++;
70: break;
71: case 'v':
72: Verbose++;
73: break;
74: case 'h':
75: default:
76: Usage();
77: return 1;
78: }
79: argc -= optind;
80: argv += optind;
81:
82: if (LoadConfig(szCfgName, &cfg)) {
83: printf("Error:: can't load #%d - %s\n", cfg_GetErrno(), cfg_GetError());
84: return 1;
85: }
86: openlog("mqttd", LOG_PID | LOG_CONS, LOG_DAEMON);
87: for (i = 0; i < 3; i++)
88: if (!mqttLoadRTLM(&cfg, i)) {
89: printf("Error:: Can't load RTL module\n");
90: while (i--)
91: mqttUnloadRTLM(i);
92: UnloadConfig(&cfg);
93: closelog();
94: return 2;
95: }
96: acc = call.OpenACC(&cfg);
97: if (!acc) {
98: ret = 3;
99: goto end;
100: }
101: pub = call.OpenPUB(&cfg);
102: if (!pub) {
103: ret = 3;
104: goto end;
105: }
106: logg = call.OpenLOG(&cfg);
107: if (!logg) {
108: ret = 3;
109: goto end;
110: }
111:
112: if (mqttMkDir(&cfg)) {
113: printf("Error:: in statedir #%d - %s\n", errno, strerror(errno));
114: ret = 3;
115: goto end;
116: }
117:
118: memset(&sa, 0, sizeof sa);
119: sigemptyset(&sa.sa_mask);
120: sa.sa_handler = sigHand;
121: sigaction(SIGHUP, &sa, NULL);
122: sigaction(SIGTERM, &sa, NULL);
123: sigaction(SIGCHLD, &sa, NULL);
124:
125: if (!batch)
126: switch (fork()) {
127: case -1:
128: printf("Error:: in fork() #%d - %s\n", errno, strerror(errno));
129: ret = 5;
130: goto end;
131: case 0:
132: setsid();
133:
134: ret = open("/dev/null", O_RDWR);
135: if (ret != -1) {
136: dup2(ret, STDIN_FILENO);
137: dup2(ret, STDOUT_FILENO);
138: dup2(ret, STDERR_FILENO);
139: close(ret);
140: }
141: VERB(2) syslog(LOG_DEBUG, "Welcome MQTT service into shadow land!");
142: break;
143: default:
144: VERB(2) syslog(LOG_DEBUG, "MQTT service go to shadow land ...");
145: sleep(1);
146: ret = 0;
147: goto end;
148: }
149: else
150: VERB(1) printf("Start service in batch mode ...\n");
151:
152: VERB(2) syslog(LOG_DEBUG, "Service is ready for start engine ...");
153:
154: if ((sock = srv_Socket(&cfg)) == -1) {
155: ret = 4;
156: goto end;
157: }
158:
159: cfg_LoadAttribute(&cfg, CFG("mqttd"), CFG("user"), CFG(szStr), sizeof szStr, MQTT_USER);
160: pass = getpwnam(szStr);
161: if (pass) {
162: setgid(pass->pw_gid);
163: setuid(pass->pw_uid);
164: VERB(1) syslog(LOG_WARNING, "Try to change group #%d and user #%d", pass->pw_gid, pass->pw_uid);
165: }
166:
167: if (!(root = schedBegin())) {
168: printf("Error:: scheduler #%d - %s\n", sched_GetErrno(), sched_GetError());
169: ret = 6;
170: goto end;
171: }
172:
173: Run(sock);
174:
175: schedEnd(&root);
176: end:
177: if (sock > STDERR_FILENO)
178: srv_Close(sock);
179: call.CloseLOG(logg);
180: call.ClosePUB(pub);
181: call.CloseACC(acc);
182: for (i = 0; i < 3; i++)
183: mqttUnloadRTLM(i);
184: closelog();
185: UnloadConfig(&cfg);
186: return ret;
187: }
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