ref: 0366f11300521165ff22423514a5d829a1f34912
dir: /sys/src/libc/port/hangup.c/
#include <u.h> #include <libc.h> #include <ctype.h> /* * force a connection to hangup */ int hangup(int ctl) { return write(ctl, "hangup", sizeof("hangup")-1) != sizeof("hangup")-1; }