strange second strace -ff log for screen on a serial console

screen-strace.log.341 (text/plain), 205 bytes, created by Sasha Polonsky on 2006-04-06 02:11:41 UTC

geteuid32()                             = 100
getegid32()                             = 10
open("/dev/ttyS0", O_RDWR)             = ? ERESTARTSYS (To be restarted)
--- SIGTERM (Terminated) @ 0 (0) ---