bug#8620: Strange problem for ls

[errik]

Dears,
      Actually this is not a bug report, so sorry to do this because I
don't know the mail address of  Richard M. Stallman, and David
MacKenzie.


These days, there is a problem that trouble me so much. I write a
simple code to get all the files under  a directory and compile the
code on RedHat 6 i686 machine. The code is as below:

#include <sys/types.h>
#include <errno.h>
#include <dirent.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char **argv)
{
        printf("Try to list the directory: %s\n", argv[1]);
        DIR * dir = NULL;
    char * path = argv[1];
    dir = opendir(path);
    errno = 0;
        if(NULL == dir)
        {
                printf("Failed to open the dir with errno: %d\n", errno);
                return -1;
        }
    struct dirent * dir_entry = NULL;
    while(dir_entry = readdir(dir))
        {
                printf("file: %s\n", dir_entry->d_name);
        }
    printf("error :%d\n", errno);
    return 0;
}

After compiled the code on RedHat 6 32 bits machine and then copy the
binary to RedHat 6 64 bits machine, it can work correctly when the
parameter for the program is a local directory.
But "readdir" always failed if the parameter is a cifs client
directory, the errno is 12.


Then I downloaded the souce code of "ls" from  GNU site and compiled
it on RedHat 6 32 bits, the binary can also works with cifs client
directory.

>From the code of ls, it also use opendir and readdir to list the directory.


It's strange ls can work but my simple code can't work.

Is there anyone can tell me the difference or forward the mail to
Richard M. Stallman, and David MacKenzie?

Thanks,
Erik