apue编程之参考du代码利用递归写的一个简单的du命令的源代码

#include <stdio.h>
#include <stdlib.h>
#include <glob.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#define PATHSIZE 1024

static int path_noloop(const char *path)
{
    char *pos;

    pos = strrchr(path,'/');//定位最右边的'/'的位置

    , || (strcmp(pos+,))
        ;
    ;

}

static int64_t mydu(const char *path)
{
    int i;
    glob_t globres;
    int64_t sum;
    static struct stat statres;
    static char nextpath[PATHSIZE];

    )
    {
        perror("lstat()");
        ;//exit(1);
    }

    if(!S_ISDIR(statres.st_mode))
        return statres.st_blocks;

    strncpy(nextpath, path,PATHSIZE);
    strncat(nextpath, "/*" , PATHSIZE);
    glob(nextpath,GLOB_NOSORT, NULL, &globres);

    strncpy(nextpath, path,PATHSIZE);
    strncat(nextpath, "/.*" , PATHSIZE);
    glob(nextpath,GLOB_NOSORT|GLOB_APPEND, NULL, &globres);

    sum = statres.st_blocks;

     ;i < globres.gl_pathc ; i++)
    {
        if(path_noloop(globres.gl_pathv[i]))
            sum += mydu(globres.gl_pathv[i]);
    }

    return sum;
}

int main(int argc,char **argv)
{
    )
    {
        fprintf(stderr,"Usage...\n");
        exit();
    }

    printf(]));

    ;
}