ref: a7f1bb9a9e1720b22d1fbed16e7527fa2cd0d82c dir: /sys/src/cmd/ip/ppp/dotest/
#!/bin/rc if(! test -e /net.alt/tcp) bind -a '#I1' /net.alt if(! test -e /net.alt2/tcp) bind -a '#I2' /net.alt2 kill 8.out|rc kill testppp|rc testppp