• C

directory listing

hi

i have the code below which prints the contents of a directory specified in dp.

main()
{
        DIR *dp = opendir(".");
        struct dirent *d;

        while ((d = readdir(dp)) != NULL)
        {
                printf("%s\n", d->d_name);
        }
 
        closedir(dp);

when it prints the contents it will also print a "." and "..". So i want to  be able to do something like the following, so it doesnot print ".,;". but his does not work. Any ideas

       while ((d = readdir(dp)) != NULL)
        {
               while(strpbrk(d->d_name,".,;"){
                        printf("%s\n", d->d_name);
               }
        }

        closedir(dp);



}
shepson990Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

sunnycoderCommented:
. and .. are the only two special directories that you are likely to encounter ...
. means current directory
.. means parent directory

        while ((d = readdir(dp)) != NULL)
        {
                if ( strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") )
                          printf("%s\n", d->d_name);
        }
0
shepson990Author Commented:
how would i get the following to work
while ((d = readdir(dp)) != NULL)
{
      if ( strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") )
        sprintf(szBuf2,"/home/shepson/netstatus/errors/%s",d->d_name);
      read=fopen(szBuf2,"r");          
      printf("%s\n", read);
}
 
0
sunnycoderCommented:
sprintf(szBuf2,"/home/shepson/netstatus/errors/%s",d->d_name);
     read=fopen(szBuf2,"r");          
     printf("%s\n", read);

fopen returns a file handle !!! Why would you like to print the file handle ? What are you trying to do ? Also if fopen fails, it will return NULL and you will try to print NULL ?
Another thing, read is a system call and be careful when you use it as a variable name
Since you may not be interested in opening . and .., you can include the fopen in the if block

while ((d = readdir(dp)) != NULL)
{
     if ( strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") )
     {
          sprintf(szBuf2,"/home/shepson/netstatus/errors/%s",d->d_name);
          read=fopen(szBuf2,"r");          
     }
}
0
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

shepson990Author Commented:
basicly i want to be able to open and print each file returned in the directory listing.
0
sunnycoderCommented:
char buf [128];

while ((d = readdir(dp)) != NULL)
{
     if ( strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") )
     {
          sprintf(szBuf2,"/home/shepson/netstatus/errors/%s",d->d_name);
          fp =fopen(szBuf2,"r");          
          if ( fp == NULL )
                  printf ( "error opening file %s\n", d->d_name );
          else
          {
                  printf ( "printing file %s\n", d->d_name );
                 while ( fgets ( buf, 128, fp ) )
                          printf ( "%s", buf );
                 fclose (fp);
           }
     }
}
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
shepson990Author Commented:
thanks. Just one question, why do you have to use fgets to get the contents on the file
0
sunnycoderCommented:
fopen simply opens the file and gives you the handle for the open file ... next you need to use that handle to read from the file ... that is exactly what fgets does ...

reads a line from the open file
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C

From novice to tech pro — start learning today.