编译apue(第三版)

想要直接使用作者提供的源代码就需要编译下,这个文件名是src.3e.tar.gz

很简单的几步就搞定了.

① 解压src.3e.tar.gz

② 进入apue.3e

③ make

④ 进入apue.3e/lib目录,复制libapue.a到/usr/local/lib目录

⑤ 进入apue.3e/include目录,复制apue.h到/usr/include目录

⑥ 复制apueerror.h到/usr/include目录

apueerror.h文件

#include "apue.h"
#include <errno.h>      /* for definition of errno */
#include <stdarg.h>     /* ISO C variable aruments */

static void err_doit(int, int, const char *, va_list);

/*
 * Nonfatal error related to a system call.
 * Print a message and return.
 */
void
err_ret(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(1, errno, fmt, ap);
    va_end(ap);
}

/*
 * Fatal error related to a system call.
 * Print a message and terminate.
 */
void
err_sys(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(1, errno, fmt, ap);
    va_end(ap);
    exit(1);
}

/*
 * Fatal error unrelated to a system call.
 * Error code passed as explict parameter.
 * Print a message and terminate.
 */
void
err_exit(int error, const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(1, error, fmt, ap);
    va_end(ap);
    exit(1);
}

/*
 * Fatal error related to a system call.
 * Print a message, dump core, and terminate.
 */
void
err_dump(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(1, errno, fmt, ap);
    va_end(ap);
    abort();        /* dump core and terminate */
    exit(1);        /* shouldn't get here */
}

/*
 * Nonfatal error unrelated to a system call.
 * Print a message and return.
 */
void
err_msg(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(0, 0, fmt, ap);
    va_end(ap);
}

/*
 * Fatal error unrelated to a system call.
 * Print a message and terminate.
 */
void
err_quit(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(0, 0, fmt, ap);
    va_end(ap);
    exit(1);
}

/*
 * Print a message and return to caller.
 * Caller specifies "errnoflag".
 */
static void
err_doit(int errnoflag, int error, const char *fmt, va_list ap)
{
    char    buf[MAXLINE];
   vsnprintf(buf, MAXLINE, fmt, ap);
   if (errnoflag)
       snprintf(buf+strlen(buf), MAXLINE-strlen(buf), ": %s",
         strerror(error));
   strcat(buf, "\n");
   fflush(stdout);     /* in case stdout and stderr are the same */
   fputs(buf, stderr);
   fflush(NULL);       /* flushes all stdio output streams */
}

编译下示例程序

#include "apue.h"
#include "apueerror.h"

static void sig_usr(int);

int main(void)
{
  if(signal(SIGUSR1,sig_usr) == SIG_ERR)
    err_sys("can't catch SIGUSR1");
  if(signal(SIGUSR2,sig_usr) == SIG_ERR)
    err_sys("can't catch SIGUSR1");

  while(1)
    pause();

}

static void sig_usr(int signo)
{
  if(signo == SIGUSR1)
    printf("received SIGUSR1\n");
  else if(signo == SIGUSR2)
    printf("received SIGUSR2\n");
  else
    err_dump("received signal %d\n",signo);   
}

编译成功就OK了.