File list (Check if you may need any files):
apue.2e
.......\add2
.......\add2.17
.......\advio
.......\.....\catgetmsg.c
.......\.....\devzero.c
.......\.....\freebsd.mk
.......\.....\linux.mk
.......\.....\macos.mk
.......\.....\mcopy.c
.......\.....\nonblockw.c
.......\.....\pendlock.c
.......\.....\solaris.mk
.......\apue.h
.......\bsd_ptyopen.c
.......\bufargs.c
.......\call
.......\....\call.c
.......\....\call.h
.......\....\escape.c
.......\....\freebsd.mk
.......\....\linux.mk
.......\....\loop.poll.c
.......\....\macos.mk
.......\....\main.c
.......\....\put.c
.......\....\solaris.mk
.......\....\take.c
.......\....\takeput.c
.......\calld
.......\.....\calld.h
.......\.....\childdial.c
.......\.....\cliargs.c
.......\.....\client.c
.......\.....\ctlstr.c
.......\.....\debug.c
.......\.....\devfile.c
.......\.....\dialfile.c
.......\.....\expectstr.c
.......\.....\freebsd.mk
.......\.....\linux.mk
.......\.....\lock.c
.......\.....\loop.c
.......\.....\macos.mk
.......\.....\main.c
.......\.....\request.c
.......\.....\sendstr.c
.......\.....\sigchld.c
.......\.....\solaris.mk
.......\.....\sysfile.c
.......\.....\ttydial.c
.......\.....\ttyopen.c
.......\cliconn.c
.......\clrfl.c
.......\daemon
.......\......\already_running.c
.......\......\already_running.o
.......\......\apue.h
.......\......\daemon
.......\......\daemon.pro
.......\......\daemonize.c
.......\......\daemonize.o
.......\......\error.c
.......\......\error.o
.......\......\fig13.7.c
.......\......\fig13.7.o
.......\......\lockfile.c
.......\......\lockfile.o
.......\......\Makefile
.......\daemonize.c
.......\daemons
.......\.......\freebsd.mk
.......\.......\init.c
.......\.......\linux.mk
.......\.......\lockfile.c
.......\.......\macos.mk
.......\.......\reread.c
.......\.......\reread2.c
.......\.......\single.c
.......\.......\solaris.mk
.......\datafiles
.......\.........\freebsd.mk
.......\.........\getpwnam.c
.......\.........\linux.mk
.......\.........\macos.mk
.......\.........\solaris.mk
.......\db
.......\..\apue_db.h
.......\..\db.c
.......\..\freebsd.mk
.......\..\linux.mk
.......\..\macos.mk
.......\..\solaris.mk
.......\..\t4.c
.......\DISCLAIMER
.......\environ
.......\.......\cmd1.c
.......\.......\cmd2.c
.......\.......\doatexit.c
.......\.......\freebsd.mk