OS lab 4

#include<stdio.h>
#include <string.h>
#include<stdlib.h>
#include<unistd.h>
#include<dirent.h>
#include <errno.h>
#include<sys/types.h>
#include <sys/stat.h>
#include<fcntl.h>
#define BUFF 1024

void fun(char *name)
{
    /*struct stat path_stat;
        stat(name, &path_stat);

    if(S_ISDIR(path_stat.st_mode))
    {
        chdir(name);
    }
    */





    char buf[BUFF];
    char buff[BUFF], buf2[BUFF];

    //printf("\n%s",name);

    //printf(getcwd(buf2,sizeof(buf)));
    strcpy(buf2,"/proc/");

    strcat(buf2,name);



    //printf("\n%s",buf2);
    chdir(buf2);
    //printf("\t%s",getcwd(buf,sizeof(buf)));

    int n = open("stat",O_RDONLY);

    //printf("\n%s",buf2);
    //printf(getcwd(buf,sizeof(buf)));

    int no;

    //printf(getcwd(buf,sizeof(buf)));
    while((no=read(n,buff,BUFF))>0)
    {
        char *token;
        int count = 0;

        token = strtok(buff," ");
        //printf("%s\n",token);

        while(token != NULL && count!=2 )
        {
            printf("%s\n",token);

            token = strtok(NULL," ");
            count++;
        }
    }
}

int main()
{
    char buf[BUFF];
        DIR *dirstream;
        struct dirent *d;

        /*char *pwd;
        pwd = getcwd(buf,sizeof(buf));
        */

        chdir("/proc");
        if(getcwd(buf,sizeof(buf))!=NULL)
        {
            if((dirstream=opendir(buf))!=NULL)
            {
                while((d=readdir(dirstream))!=NULL)
                {
                    if(isdigit((d->d_name)[0]))

                    {
                        fun(d->d_name);


                    }






                }

            }
            else
                    {
                        printf("Error.");
                        exit(1);
                    }

        }

    return 0;
}