源码：

#include "apue.h"
int main(int argc, char argv[])
{
        int i;
        struct stat buff;
        char *ptr;
        #for(i = 1; i < argc; i++)Segmentation fault (core dumped) memmory overflow
        for(i = 1; i < argc; i++)
        {
                printf("%s:",argv[i]);
                if(lstat(argv[i], &buff) < 0)
                {
                        err_ret("lstat error");
                        continue;
                }
                if(S_ISREG(buff.st_mode))
                        ptr = "regular";
                else if(S_ISDIR(buff.st_mode))
                        ptr = "directory";
                else if(S_ISBLK(buff.st_mode))
                        ptr = "block apecial";
                else if(S_ISCHR(buff.st_mode))

ptr = "char special";
                else if(S_ISFIFO(buff.st_mode))
                        ptr = "FIFO";
                else if(S_ISLNK(buff.st_mode))
                        ptr = "symbolic link";
                else if(S_ISSOCK(buff.st_mode))
                        ptr = "socket";
                else
                        ptr = "unknown mode";
                printf("%s file\n", ptr);
        }
        exit(0);
}
 
运行之后，出现错误：

/usr/include/sys/stat.h:264:12: note: expected ‘const char * __restrict__’ but argument is of type ‘char’
 extern int lstat (const char *__restrict __file,）

查看stat.h 文件后，发现：

extern int lstat (const char *__restrict __file,
                  struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
# else
#  ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (lstat,
                           (const char *__restrict __file,
                            struct stat *__restrict __buf), lstat64)
     __nonnull ((1, 2));

应该是因为本书是在Linux3.20下做的实验，而我是在3.10下做的，所以出现了问题，所以在做示例程序时，最好避免环境的不一致性，会省去很多的问题（不过不出错，可能就不会学习到额外的东西吧，各有利弊吧）。