why printf() don't work?

I use FreeBSD7.0,and use signal,like follows: signal(SIGHUP,sig_hup); signal(SIGIO,sig_io); when I run call following code,it can run,but I find a puzzled question,it should print some information,such as printf("execute main()") will print execute main(),but in fact,printf fuction print none!!!

where is syslogd log?

I call syslog(),LOG_USER with Unix C language,it should write a message in /var/adm/messages in Solaris,such as "connected from 10.1.1.2" ,I want to know which file in FreeBSD?I look for /var/log/messages,I don't find my message "connected from 10.1.1.2" in this file. Why? My syslog.conf is