Unix——学习《Unix环境高级编程》找不到“apue.h”方法

在运行《UNIX环境高级编程》中的程序时会遇到apue.h包头找不到的情况，这是作者为了方便程序书写封闭了一些功能函数和错误处理等。在http://www.apuebook.com中可以下载到书的所有的实例代码，解压后为apue.2e。
进入网站，选择对应版本的资料

将 Source Code 下载

在linux下运行

tar -zxvf src.3e.tar.gz

会解压生成一个apue.3e的文件夹，将 include 文件夹下的apue.h和lib文件夹下的error.c 复制到/usr/include文件夹下，注意要用root权限~
1. su root,然后输入密码
2. 在apue.2e文件夹下执行 cp ./inlcude/apue.h /usr/include
3. 在apue.2e文件夹下执行 cp ./lib/error.c /usr/include
4. 修改apue.h文件，在文件末尾，在#endif前面加上#include “error.c”，执行vim /usr/include/apue.h，然后加上#include “error.c”就可以了

/* Our own header, to be included before all standard system headers */  #ifndef _APUE_H  #define _APUE_H  #if defined(SOLARIS)  #define _XOPEN_SOURCE   500 /* Single UNIX Specification, Version 2  for Solaris 9 */  #define CMSG_LEN(x) _CMSG_DATA_ALIGN(sizeof(struct cmsghdr)+(x))  #elif !defined(BSD)  #define _XOPEN_SOURCE   600 /* Single UNIX Specification, Version 3 */  #endif  #include <sys/types.h>        /* some systems still require this */  #include <sys/stat.h>  #include <sys/termios.h>  /* for winsize */  #ifndef 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 */  /*  * 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 */  #if defined(SIG_IGN) && !defined(SIG_ERR)  #define SIG_ERR ((Sigfunc *)-1)  #endif  #define min(a,b)    ((a) < (b) ? (a) : (b))  #define max(a,b)    ((a) > (b) ? (a) : (b))  /*  * Prototypes for our own functions.  */  char    *path_alloc(int *);             /* {Prog pathalloc} */  long     open_max(void);                /* {Prog openmax} */  void     clr_fl(int, int);              /* {Prog setfl} */  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} */  int      tty_cbreak(int);               /* {Prog raw} */  int      tty_raw(int);                  /* {Prog raw} */  int      tty_reset(int);                /* {Prog raw} */  void     tty_atexit(void);              /* {Prog raw} */  #ifdef  ECHO    /* only if <termios.h> has been included */  struct termios  *tty_termios(void);     /* {Prog raw} */  #endif  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} */  void     daemonize(const char *);           /* {Prog daemoninit} */  int      s_pipe(int *);                 /* {Progs streams_spipe sock_spipe} */  int      recv_fd(int, ssize_t (*func)(int,                   const void *, size_t));/* {Progs recvfd_streams recvfd_sockets} */  int      send_fd(int, int);             /* {Progs sendfd_streams sendfd_sockets} */  int      send_err(int, int,                    const char *);        /* {Prog senderr} */  int      serv_listen(const char *);     /* {Progs servlisten_streams servlisten_sockets} */  int      serv_accept(int, uid_t *);     /* {Progs servaccept_streams servaccept_sockets} */  int      cli_conn(const char *);        /* {Progs cliconn_streams cliconn_sockets} */  int      buf_args(char *, int (*func)(int,                    char **));            /* {Prog bufargs} */  int      ptym_open(char *, int);    /* {Progs3 ptyopen_streams ptyopen_bsd ptyopen_linux} */  int      ptys_open(char *);         /* {Progs3 ptyopen_streams ptyopen_bsd ptyopen_linux} */  #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_dump(const char *, ...);        /* {App misc_source} */  void    err_msg(const char *, ...);  void    err_quit(const char *, ...);  void    err_exit(int, const char *, ...);  void    err_ret(const char *, ...);  void    err_sys(const char *, ...);  void    log_msg(const char *, ...);         /* {App misc_source} */  void    log_open(const char *, int, int);  void    log_quit(const char *, ...);  void    log_ret(const char *, ...);  void    log_sys(const char *, ...);  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);  #include "error.c"  #endif  /* _APUE_H */