打印文件类型

#include "apue.h"

int main(int argc,char *argv[])
{
    int i;
    struct stat buf;
    char *ptr;
    for(i=1;i<argc;i++)
    {
        printf("%s:",argv[i]);
        if(lstat(argv[i],&buf)<0)
        {
            printf("lstat error\n");
            continue;
        }
        if(S_ISREG(buf.st_mode))
            ptr="regular";
        else if(S_ISDIR(buf.st_mode))
            ptr="directory";
        else if(S_ISCHR(buf.st_mode))
            ptr="character special";
        else if(S_ISBLK(buf.st_mode))
            ptr="block special";
        else if(S_ISFIFO(buf.st_mode))
            ptr="block special";
        else if(S_ISLNK(buf.st_mode))
            ptr="symbolic link";
        else if(S_ISSOCK(buf.st_mode))
            ptr="socket";
        else
            ptr="** unknow mode **";
        printf("%s\n",ptr);

    }
    return 0;

}