/* mode: 0-normal, 1-flush ucache to specific file */
static void flushdata(int mode)
{
FILE *fp;
char tmptext[256];
switch(mode) {
case 0:
flush_ucache(NULL);
flush_bcache();
if (NULL != (fp = fopen("etc/maxuser", "w"))) {
fprintf(fp, "%d %d", publicshm->max_user,publicshm->max_wwwguest);
fclose(fp);
}
bbslog("4miscdaemon", "flush passwd file");
break;
case 1:
flush_ucache(specfname);
sprintf(tmptext, "flush passwd file into %s", specfname);
bbslog("4miscdaemon", tmptext);
break;
}
}
int main(int argc, char *argv[]) {
chdir(BBSHOME); //进入BBS用户主目录
setuid(BBSUID); //将进程的 用户ID
setgid(BBSGID); //组ID设置成BBS
setreuid(BBSUID, BBSUID); //设置有效用户ID
setregid(BBSGID, BBSGID); //有效组ID为BBS
if (argc <= 1) {
printf("usage: daemon | flushed | reload\n");
exit(0);
}
if ( !strcasecmp(argv[1], "daemon") ) { // miscd daemon
switch (fork()) { //后台程序:需要创建一个子进程,由子进程杀死父进程
case -1: //
printf("cannot fork\n");
exit(0);
break;
case 0: // 子进程
break;
default:
exit(0); //父进程
break;
}
if (load_ucache() != 0) { //将用户的数据映射到内存
printf("load ucache error\n");
exit(-1);
}
if (resolve_boards() < 0)
exit(-1);
atexit(do_exit); //注册退出前运行的函数.正常退出前须执行此函数
while (1) { //循环
refresh_utmp(); //刷新用户临时数据
b_closepolls(); //关闭投票
flush_ucache(); //将用户在内存中的数据写回.PASSWDS
flush_bcache();
sleep(60 * 15); //睡眠十分钟,即每十五分钟同步一次.
}
} else if ( !strcasecmp(argv[1], "flushed") ) { //miscd flushed
if (resolve_ucache() == -1)
exit(1);
flush_ucache();
flush_bcache();
} else if ( !strcasecmp(argv[1], "reload") ) { //miscd reload
if (load_ucache() != 0) {
printf("load ucache error\n");
exit(-1);
}
} else {
printf("usage: daemon | flushed | reload\n");
exit(0);
}
return 0;
}
static void flushdata()
{
FILE *fp;
flush_ucache();
flush_bcache();
if (NULL != (fp = fopen("etc/maxuser", "w"))) {
fprintf(fp, "%d %d", publicshm->max_user,publicshm->max_wwwguest);
fclose(fp);
}
bbslog("4miscdaemon", "flush passwd file");
}
//退出时执行的函数
void do_exit() {
flush_ucache();
flush_bcache();
}