NAME

       dpns_readdir - read DPNS directory opened by dpns_opendir in the name server

SYNOPSIS

       #include <sys/types.h>
       #include "dpns_api.h"

       struct dpns_direnstatg *dpns_readdir (dpns_DIR *dirp)

DESCRIPTION

       dpns_readdir  reads the DPNS directory opened by dpns_opendir in the name server.  This routine returns a
       pointer to a structure containing the current directory entry including the GUID associated.

       struct dpns_direnstatg {
            u_signed64     fileid;
            char      guid[CA_MAXGUIDLEN+1];
            mode_t         filemode;
            int       nlink;         /* number of files in a directory */
            uid_t          uid;
            gid_t          gid;
            u_signed64     filesize;
            time_t         atime;         /* last access to file */
            time_t         mtime;         /* last file modification */
            time_t         ctime;         /* last metadata modification */
            short          fileclass;     /* not used */
            char      status;        /* ' ' --> online, 'm' --> migrated */
            char      csumtype[3];   /* "CS", "AD" or "MD" */
            char      csumvalue[33];
            unsigned short d_reclen; /* length of this entry */
            char      d_name[1];     /* basename in variable length */
       };

       dpns_readdir caches a variable number of such entries, depending on the filename size,  to  minimize  the
       number of requests to the name server.

       dirp   specifies the pointer value returned by dpns_opendir.

RETURN VALUE

       This routine returns a pointer to a structure containing the current directory entry if the operation was
       successful or NULL if the end of the directory was reached or if the operation failed. When  the  end  of
       the  directory  is  encountered,  serrno  is  not  changed.  If  the  operation  failed,  serrno  is  set
       appropriately.

       As dpns_readdir returns a null pointer both at the end of the directory  and  on  error,  an  application
       wishing  to  check for error situations should set serrno to 0, then call dpns_readdir, then check serrno
       and if it is non-zero, assume an error has occurred.

ERRORS

       EBADF        File descriptor in DIR structure is invalid.

       EFAULT       dirp is a NULL pointer.

       SECOMERR     Communication error.

       ENSNACT      Name server is not running or is being shutdown.

SEE ALSO

       dpns_closedir(3), dpns_opendir(3), dpns_rewinddir(3)

AUTHOR

       LCG Grid Deployment Team