《UNIX环境高级编程》一书中有不少的代码，在学习的过程中需要自己来实际编写这些代码，调试运行。作者在代码头文件中引用了#include "apue.h"，其中包含了常用的头文件以及一些自定义函数，我们自己要能够完成其配置，本文的试验机器为ubuntu16.04。
1， 首先在http://www.apuebook.com/ 下载其source code : src.3e.tar.gz
2, 解压tar -xvf src.3e.tar.gz
3， 进入apue.3e，
$ > cd apue.3e
$ > make
4， 这时候可能会报错，找不到-lbsd，解决办法：
$>sudo apt-get install libbsd-dev
5，再次make， 然后把include/apue.h 复制到/usr/include/文件夹下，lib/libapue.a 复制到/usr/local/lib/目录下
sudo cp include/apue.h /usr/include/
sudp cp lib/libapue.a /usr/local/lib
6, 使用gcc编译，以全书第一个例子为例：
7， 或者采用另外一种方法， 或者把apue.3e/lib/error.c文件复制到/usr/include/下面，然后修改apue.h文件。
然后在最后面加上一行(至少应该在MAX_LINE后面)，#include "error.c"
/*
* Our own header, to be included before all standard system headers.
*/
#ifndef _APUE_H
#define _APUE_H
#define _POSIX_C_SOURCE 200809L
#if defined(SOLARIS) /* Solaris 10 */
#define _XOPEN_SOURCE 600
#else
#define _XOPEN_SOURCE 700
#endif
#include <sys/types.h> /* some systems still require this */
#include <sys/stat.h>
#include <sys/termios.h> /* for winsize */
#if defined(MACOS) || !defined(TIOCGWINSZ)
#include <sys/ioctl.h>
#endif
#include <stdio.h> /* for convenience */
#include <stdlib.h> /* for convenience */
#include <stddef.h> /* for offsetof */
#include <string.h> /* for convenience */
#include <unistd.h> /* for convenience */
#include <signal.h> /* for SIG_ERR */
#define MAXLINE 4096 /* max line length */
/***
* for 《Unix环境高级编程》
*/
#include "error.c"
/*
* Default file access permissions for new files.
*/
#define FILE_MODE (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)
/*
* Default permissions for new directories.
*/
#define DIR_MODE (FILE_MODE | S_IXUSR | S_IXGRP | S_IXOTH)
typedef void Sigfunc(int); /* for signal handlers */
#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))
/*
* Prototypes for our own functions.
*/
char *path_alloc(size_t *); /* {Prog pathalloc} */
long open_max(void); /* {Prog openmax} */
int set_cloexec(int); /* {Prog setfd} */
void clr_fl(int, int);
void set_fl(int, int); /* {Prog setfl} */
void pr_exit(int); /* {Prog prexit} */
void pr_mask(const char *); /* {Prog prmask} */
Sigfunc *signal_intr(int, Sigfunc *); /* {Prog signal_intr_function} */
void daemonize(const char *); /* {Prog daemoninit} */
void sleep_us(unsigned int); /* {Ex sleepus} */
ssize_t readn(int, void *, size_t); /* {Prog readn_writen} */
ssize_t writen(int, const void *, size_t); /* {Prog readn_writen} */
int fd_pipe(int *); /* {Prog sock_fdpipe} */
int recv_fd(int, ssize_t (*func)(int,
const void *, size_t)); /* {Prog recvfd_sockets} */
int send_fd(int, int); /* {Prog sendfd_sockets} */
int send_err(int, int,
const char *); /* {Prog senderr} */
int serv_listen(const char *); /* {Prog servlisten_sockets} */
int serv_accept(int, uid_t *); /* {Prog servaccept_sockets} */
int cli_conn(const char *); /* {Prog cliconn_sockets} */
int buf_args(char *, int (*func)(int,
char **)); /* {Prog bufargs} */
int tty_cbreak(int); /* {Prog raw} */
int tty_raw(int); /* {Prog raw} */
int tty_reset(int); /* {Prog raw} */
void tty_atexit(void); /* {Prog raw} */
struct termios *tty_termios(void); /* {Prog raw} */
int ptym_open(char *, int); /* {Prog ptyopen} */
int ptys_open(char *); /* {Prog ptyopen} */
#ifdef TIOCGWINSZ
pid_t pty_fork(int *, char *, int, const struct termios *,
const struct winsize *); /* {Prog ptyfork} */
#endif
int lock_reg(int, int, int, off_t, int, off_t); /* {Prog lockreg} */
#define read_lock(fd, offset, whence, len) \
lock_reg((fd), F_SETLK, F_RDLCK, (offset), (whence), (len))
#define readw_lock(fd, offset, whence, len) \
lock_reg((fd), F_SETLKW, F_RDLCK, (offset), (whence), (len))
#define write_lock(fd, offset, whence, len) \
lock_reg((fd), F_SETLK, F_WRLCK, (offset), (whence), (len))
#define writew_lock(fd, offset, whence, len) \
lock_reg((fd), F_SETLKW, F_WRLCK, (offset), (whence), (len))
#define un_lock(fd, offset, whence, len) \
lock_reg((fd), F_SETLK, F_UNLCK, (offset), (whence), (len))
pid_t lock_test(int, int, off_t, int, off_t); /* {Prog locktest} */
#define is_read_lockable(fd, offset, whence, len) \
(lock_test((fd), F_RDLCK, (offset), (whence), (len)) == 0)
#define is_write_lockable(fd, offset, whence, len) \
(lock_test((fd), F_WRLCK, (offset), (whence), (len)) == 0)
void err_msg(const char *, ...); /* {App misc_source} */
void err_dump(const char *, ...) __attribute__((noreturn));
void err_quit(const char *, ...) __attribute__((noreturn));
void err_cont(int, const char *, ...);
void err_exit(int, const char *, ...) __attribute__((noreturn));
void err_ret(const char *, ...);
void err_sys(const char *, ...) __attribute__((noreturn));
void log_msg(const char *, ...); /* {App misc_source} */
void log_open(const char *, int, int);
void log_quit(const char *, ...) __attribute__((noreturn));
void log_ret(const char *, ...);
void log_sys(const char *, ...) __attribute__((noreturn));
void log_exit(int, const char *, ...) __attribute__((noreturn));
void TELL_WAIT(void); /* parent/child from {Sec race_conditions} */
void TELL_PARENT(pid_t);
void TELL_CHILD(pid_t);
void WAIT_PARENT(void);
void WAIT_CHILD(void);
#endif /* _APUE_H */