int main(int argc, char *argv[], char *envp[])
{
mog_upgrade_prepare(argc, argv, envp);
/* hack for older gcov + gcc, see nostd/setproctitle.h */
spt_init(argc, argv, envp);
set_program_name(argv[0]);
mog_intr_disable();
setup(argc, argv); /* this daemonizes */
mog_process_init(worker_processes);
if (worker_processes == 0)
run_worker(0);
else
run_master();
return 0;
}
int main (int argc, char **argv) {
struct timeval tv;
// 初始化相关环境变量与库
#ifdef INIT_SETPROCTITLE_REPLACEMENT
spt_init(argc, argv);
#endif
// 设置当前的`locale`命令里的内容
setlocale(LC_COLLATE, "");
// 自动分配线程安全
zmalloc_enable_thread_safeness();
// 设置自动分配函数句柄(out of memory)
zmalloc_set_oom_handler(redisOutOfMemoryHandler);
// 时间异或pid生成随机数种子
srand(time(NULL) ^ getpid());
gettimeofday(&tv, NULL);
// 设置字典hash值种子
dictSetHashFunctionSeed(tv.tv_sec ^ tv.tv_usec ^ getpid());
// 定点模式检测
server.sentinel_mode = checkForSentinelMode(argc, argv);
// 初始化服务配置
initServerConfig();
// 定点模式处理
if (server.sentinel_mode) {
printf("deal with sentinel mode\n");
}
if (argc >= 2) {
int j = 1;
// init empty string
sds options = sdsempty();
char *configfile = NULL;
if (strcmp(argv[1], "-v") == 0 ||
strcmp(argv[1], "--version") == 0) version();
if (strcmp(argv[1], "--help") == 0 ||
strcmp(argv[1], "-h") == 0) usage();
if (strcmp(argv[1], "--test-memory") == 0) {
if (argc == 3) {
// 内存测试还未完全写完
memtest(atoi(argv[2]), 50);
exit(0);
} else {
fprintf(stderr, "Please specify the amount of memory to test in megabytes.\n");
fprintf(stderr, "Example: ./redis-server --test-memory 4096\n\n");
exit(1);
}
}
/*
* 第一个参数为'--'开头, j始终为1
* 第一个参数不为'--'开头, j始终为2
*
*/
// j为1,第1个参数不是'--'开头的是配置文件
if (argv[j][0] != '-' || argv[j][1] != '-') {
configfile = argv[j++];
}
// 配置文件参数后还有内容
while (j != argc) {
// 所有参数有包括'--'开头的参数
if (argv[j][0] == '-' && argv[j][1] == '-') {
if (sdslen(options)) options = sdscat(options, "\n");
options = sdscat(options, " ");
} else {
// append new string, 转义特殊字符, return new pointer
options = sdscatrepr(options, argv[j], strlen(argv[j]));
options = sdscat(options, " ");
}
j++;
}
if (server.sentinel_mode && configfile && *configfile == '-') {
printf("need redis log\n");
exit(1);
}
if (configfile) {
server.configfile = getAbsolutePath(configfile);
}
resetServerSaveParams();
loadServerConfig(configfile, options);
sdsfree(options);
} else {
printf("warning: no config file specified\n");
}
// 后台模式
if (server.daemonize) {
daemonize();
}
// init server
initServer();
printf("redis done\n");
return 0;
}
// ---------------------------------------------------------------------------
// int main()
//
// the entry of x_agent.
// ---------------------------------------------------------------------------
//
int main(int argc, char* argv[]) {
spt_init(argc, argv);
int ch;
bool isRunDeamon = false;
string configFile("./agent.ini");
while((ch = getopt(argc, argv, "c:l:dvh")) != -1) {
switch(ch) {
case 'c': {
if (optarg) {
configFile = optarg;
}
}
break;
case 'd': {
isRunDeamon = true;
}
break;
case 'l': {
if (optarg) {
int loglevel = atoi(optarg);
loglevel = loglevel == 0 ? 2 : loglevel;
CSingleton<CLogWriter>::Instance()->SetLogLevel(loglevel);
}
}
break;
default: {
if (ch == 'v' || (optarg && strcmp(optarg, "-v") == 0)) {
fprintf(stderr, "%s version: %s, compile-time: %s\n",
argv[0], FullVersion, CompileInfo);
} else if (ch == 'h' || (optarg && strcmp(optarg, "-h") == 0)) {
fprintf(stderr,"%s", HelpMsg);
} else {
fprintf(stderr,"\tError:%s -h for help.\n", argv[0]);
}
fflush(stderr);
fflush(stdout);
_exit(0);
}
break;
}
}
// run by daemon mode.
if (isRunDeamon) {
wyf::DaemonMode();
}
//register signal func
atexit(before_exit);
CatchSignal();
setproctitle("%s:Master.%d", argv[0], getpid());
do {
int childPid = fork();
if (childPid == 0) {
setsid();
atexit(before_exit);
setproctitle("%s:%s", argv[0], "Worker.");
CatchSignal();
// child process.
StartAgent(configFile);
_exit(0);
} else if (childPid > 0) {
LOG(LL_ERROR, "Start agent worker process:(%lu).",
childPid);
int checkTimes = 3;
do {
sleep(1);
if (kill(childPid, 0) == 0) {
// child exist...
checkTimes = 3;
sleep(5);
}
} while (checkTimes-- > 0);
LOG(LL_ERROR, "agent worker process:(%lu) exit, try to start again.",
childPid);
}
sleep(1);
} while (1);
return RET_OK;
}
