source code中的README只提供了編譯方式，要是自己敲代碼的話，需要稍微修改一下。

1.編譯《APUE》

在那里編譯都是一樣，我們應該的是libapue.a 和apue.h文件。

我使用的目錄是/home/dan/download/apue.2e/

修改Make.defines.linux文件中，

WKDIR=/home/dan/download/apue.2e

在我的機器上編譯時，提示ARG_MAX未定義，可以這樣修改。

在apue.2e/include/apue.h中添加一行：

#define ARG_MAX 4096

打開apue.2e/threadtl/getenv1.c 和apue.2e/threadctl/getenv3.c，添加一行：

#include "apue.h"

這樣就可以編譯通過了，復制apue.2e/include/apue.h到/usr/include下，

apue.2e/lib/libapue.a 到/usr/lib/和 /usr/lib64下。

2. 使用apue.h文件和libapue.a庫。

假定/tmp下有一個文件：threadid.c，內容如下(apue線程章節的實例):

#include

#include

pthread_t ntid;

void

printids(const char *s)

{

pid_t pid;

pthread_t tid;

pid = getpid();

tid = pthread_self();

printf("%s pid %u tid %u (0x%x)\n", s, (unsigned int)pid,

(unsigned int)tid, (unsigned int)tid);

}

void *

thr_fn(void *arg)

{

printids("new thread: ");

return((void *)0);

}

int

main(void)

{

int err;

err = pthread_create(&ntid, NULL, thr_fn, NULL);

if (err != 0)

err_quit("can't create thread: %s\n", strerror(err));

printids("main thread:");

sleep(1);

exit(0);

}

使用如下命令編譯：

cc -o threadid threadid.c -lapue -lpthread

可以運行一下：

dan@dan-laptop:/tmp$ ./threadid

new thread: pid 17490 tid 816015696 (0x30a36950)

main thread: pid 17490 tid 823949040 (0x311c76f0)

3. 編譯《UNP》

這個稍微麻煩些。

我們首先造成一個目錄，以后自己的代碼就敲在這個目錄里。

mkdir /home/dan/study/unp

仍然是下載到/home/dan/download/，解壓縮，進入目錄

cd /home/dan/download/unpv13e/

README文件中說的很具體：

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

Execute the following from the src/ directory:

./configure # try to figure out all implementation differences

cd lib # build the basic library that all programs need

make # use "gmake" everywhere on BSD/OS systems

cd ../libfree # continue building the basic library

make

cd ../libroute # only if your system supports 4.4BSD style routing sockets

make # only if your system supports 4.4BSD style routing sockets

cd ../libxti # only if your system supports XTI

make # only if your system supports XTI

cd ../intro # build and test a basic client program

make daytimetcpcli

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

這里只編譯lib下的文件，這樣可以產生libunp.a，復制這個靜態庫到/usr/lib/和/usr/lib64/

如果提示：

unp.h:139: error: conflicting types for ‘socklen_t’

/usr/include/bits/socket.h:35: error: previous declaration of ‘socklen_t’ was here

需要注解掉當前目錄中unp.h的第１３９行。

復制libunp.a到系統目錄：

root@dan-laptop:/home/dan/download/unpv13e/lib# cp ../libunp.a /usr/lib

root@dan-laptop:/home/dan/download/unpv13e/lib# cp ../libunp.a /usr/lib64/

4.使用unp.h和libunp.a

如果直接復制unpv13e/lib/unp.h到/usr/include，那么在別的目錄編譯書上代碼時，很可會受到類似上面的錯誤：

In file included from daytimetcpsrv1.c:1:

/usr/include/unp.h:227: error: redefinition of ‘struct sockaddr_storage’

In file included from daytimetcpsrv1.c:1:

/usr/include/unp.h:249:30: error: ../lib/addrinfo.h: No such file or directory

/usr/include/unp.h:263: error: redefinition of ‘struct timespec’

/usr/include/unp.h:363: error: conflicting types for ‘gai_strerror’

/usr/include/netdb.h:647: error: previous declaration of ‘gai_strerror’ was here

/usr/include/unp.h:367: error: conflicting types for ‘getnameinfo’

/usr/include/netdb.h:653: error: previous declaration of ‘getnameinfo’ was here

/usr/include/unp.h:371: error: conflicting types for ‘gethostname’

/usr/include/unistd.h:857: error: previous declaration of ‘gethostname’ was here

/usr/include/unp.h:387: error: conflicting types for ‘inet_ntop’

/usr/include/arpa/inet.h:65: error: previous declaration of ‘inet_ntop’ was here

/usr/include/unp.h:395: error: conflicting types for ‘pselect’

/usr/include/sys/select.h:121: error: previous declaration of ‘pselect’ was here

daytimetcpsrv1.c: In function ‘main’:

daytimetcpsrv1.c:9: error: ‘MAX_LINE’ undeclared (first use in this function)

daytimetcpsrv1.c:9: error: (Each undeclared identifier is reported only once

daytimetcpsrv1.c:9: error: for each function it appears in.)

dan@dan-laptop:~/study/unp/4$ rm -f /usr/include/unp.h

解決方法有點傻：

進入我們起初時建立的目錄：

cd /home/dan/study/unp

復制config.h和unp.h到此目錄：

dan@dan-laptop:~/study/unp$ cp /home/dan/download/unpv13e/config.h .

dan@dan-laptop:~/study/unp$ cp /home/dan/download/unpv13e/lib/unp.h .

修改unp.hunp和apue閱讀順序unp和apue閱讀順序，

#include "../config.h"改成 #include "config.h"

添加一行：

#define MAX_LINE 2048

練習書上代碼時，在unp目錄下創建相應的章節目錄，文件中添加一行：

#include "../unp.h"

編譯時鏈接unp庫就可以了。

以第四章的daytimetcpsrv1.c為例：

dan@dan-laptop:~/study/unp/4$ pwd

/home/dan/study/unp/4

dan@dan-laptop:~/study/unp/4$ cat daytimetcpsrv1.c

#include "../unp.h"

#include

int main(int argc, char **argv)

{

int listenfd, connfd;

socklen_t len;

struct sockaddr_in servaddr, cliaddr;

char buff[MAX_LINE];

time_t ticks;

listenfd = Socket(AF_INET, SOCK_STREAM, 0);

bzero(&servaddr, sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_addr.s_addr = htonl(INADDR_ANY);

servaddr.sin_port = htons(13);

Bind(listenfd, (SA *)&servaddr, sizeof(servaddr));

Listen(listenfd, LISTENQ);

for (;;) {

len = sizeof(cliaddr);

connfd = Accept(listenfd, (SA *)&cliaddr, &len);

printf("connection from %s, port %d\n",

Inet_ntop(AF_INET, &cliaddr.sin_addr, buff, sizeof(buff)),

ntohs(cliaddr.sin_port));

ticks = time(NULL);

snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));

Write(connfd, buff, strlen(buff));

Close(connfd);

}

}

編譯：

cc -o daytimetcpsrv1 daytimetcpsrv1.c -lunp

運行一下：

root@dan-laptop:/home/dan/study/unp/4# ./daytimetcpsrv1 &

[1] 22106

root@dan-laptop:/home/dan/study/unp/4#

root@dan-laptop:/home/dan/study/unp/4# ./daytimetcpcli

usage: a.out

root@dan-laptop:/home/dan/study/unp/4# ./daytimetcpcli 127.0.0.1

connection from 127.0.0.1, port 42064

Fri Aug 21 23:03:56 2009

root@dan-laptop:/home/dan/study/unp/4# netstat -nt

Active Internet connections (w/o servers)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 127.0.0.1:13 127.0.0.1:42064 TIME_WAIT

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