dpns_readdirxr man page

DPNS_READDIRXR(3)           DPNS Library Functions           DPNS_READDIRXR(3)

[1mNAME[0m
      dpns_readdirxr - read DPNS directory opened by [1mdpns_opendir [22min the name
      server

[1mSYNOPSIS[0m
      [1m#include <sys/types.h>[0m
      [1m#include "dpns_api.h"[0m

      [1mstruct dpns_direnrep *dpns_readdirxr (dpns_DIR *[4m[22mdirp[24m[1m, char *[4m[22mse[24m[1m)[0m

[1mDESCRIPTION[0m
      [1mdpns_readdirxr [22mreads the DPNS directory opened by [1mdpns_opendir  [22min  the
      name  server.  This routine returns a pointer to a structure containing
      the current directory entry  (basename,  guid  and  filesize)  and  the
      replica information.

      struct dpns_rep_info {
           u_signed64     fileid;
           char      status;
           char      *host;
           char      *sfn;
      };

      struct dpns_direnrep {
           u_signed64     fileid;
           char      guid[CA_MAXGUIDLEN+1];
           mode_t         filemode;
           u_signed64     filesize;
           int       nbreplicas;
           struct dpns_rep_info *rep;    /* array of replica info structures */
           unsigned short d_reclen; /* length of this entry */
           char      d_name[1];     /* basename in variable length */
      };

      [1mdpns_readdirxr  [22mcaches  a variable number of such entries, depending on
      the filename size, to minimize the  number  of  requests  to  the  name
      server.

      [4mdirp[24m   specifies the pointer value returned by [1mdpns_opendir[22m.

      [4mse[24m     allows to restrict the replica entries to a given SE.

[1mRETURN VALUE[0m
      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, [1mserrno [22mis set appropriately.

      As  dpns_readdirxr returns a null pointer both at the end of the direc-
      tory and on error, an application wishing to check for error situations
      should set [1mserrno [22mto 0, then call dpns_readdirxr, then check [1mserrno [22mand
      if it is non-zero, assume an error has occurred.

[1mERRORS[0m
      [1mEBADF        [22mFile descriptor in DIR structure is invalid.

      [1mENOMEM       [22mMemory could not be allocated for unmarshalling the reply.

      [1mEFAULT       [4m[22mdirp[24m is a NULL pointer.

      [1mEINVAL       [22mThe length of [4mse[24m exceeds [1mCA_MAXHOSTNAMELEN[22m.

      [1mSECOMERR     [22mCommunication error.

      [1mENSNACT      [22mName server is not running or is being shutdown.

[1mSEE ALSO[0m
      [1mdpns_closedir(3)[22m, [1mdpns_opendir(3)[22m, [1mdpns_rewinddir(3)[0m

[1mAUTHOR[0m
      [1mLCG Grid Deployment [22mTeam

DPNS         $Date: 2011-06-15 09:20:59 +0200 (Wed, 15 Jun 201D1P)NS$_READDIRXR(3)