open

root@host0:~ # who user1 pts/0 Sep 18 13:08 (1.2.3.4) user2 pts/1 Sep 18 13:09 (1.2.3.5) root@host0:~ # write user2 write: user2 is not logged in The truss follows: root@host0:~ # truss write user2 mmap(0x0,131072,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0)...