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       dpns_accessr - check existence/accessibility of a file replica


       Under Unix:
       #include <sys/types.h>
       #include <unistd.h>
       #include "dpns_api.h"

       Under Windows/NT:
       #include <sys/types.h>
       #define R_OK 4
       #define W_OK 2
       #define X_OK 1
       #define F_OK 0
       #include "dpns_api.h"

       int dpns_accessr (const char *sfn, int amode);


       dpns_accessr  checks  in  the name server database the existence or the
       accessibility of the file replica sfn according to the bit  pattern  in
       amode using the real user ID.

       sfn    is  either  the  Site  URL  or  the  Physical  File Name for the

       amode  the bit pattern is built by an OR of the  constants  defined  in
              <unistd.h>   under  Unix  or  to  be  explicitly  defined  under

              R_OK   test for read permission

              W_OK   test for write permission

              X_OK   test for search/execute permission

              F_OK   test for existence of the file.


       This routine returns 0 if the operation was successful  or  -1  if  the
       operation failed. In the latter case, serrno is set appropriately.


       ENOENT       The named file does not exist.

       EACCES       Search  permission  is denied on a component of the parent
                    file prefix, the specified access to the  file  itself  is
                    denied  or W_OK is requested but the replica status is not
                    ā€™Pā€™ (cannot modify an existing file).

       EFAULT       sfn is a NULL pointer.

       EINVAL       amode is invalid.

       ENAMETOOLONG The length of sfn exceeds CA_MAXSFNLEN.

       SENOSHOST    Host unknown.

       SENOSSERV    Service unknown.

       SECOMERR     Communication error.

       ENSNACT      Name server is not running or is being shutdown.


       Castor_limits(4), dpns_chmod(3), dpns_statr(3)


       LCG Grid Deployment Team

DPNS         $Date: 2010-04-05 09:51:26 +0200 (Mon, 05 Apr 2010DPNS_ACCESSR(3)