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       dpns_access - check existence/accessibility of a file/directory


       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_access (const char *path, int amode);


       dpns_access  checks  in  the  name server database the existence or the
       accessibility of the file/directory path according to the  bit  pattern
       in amode using the real user ID.

       path   specifies  the  logical  pathname  relative  to the current DPNS
              directory or the full DPNS pathname.

       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 directory/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/directory does not exist.

       EACCES       Search  permission  is  denied  on a component of the path
                    prefix or specified access to the file itself is denied.

       EFAULT       path is a NULL pointer.

       ENOTDIR      A component of path prefix is not a directory.

       EINVAL       amode is invalid.

       ENAMETOOLONG The length of path exceeds CA_MAXPATHLEN or the length  of
                    a path component exceeds CA_MAXNAMELEN.

       SENOSHOST    Host unknown.

       SENOSSERV    Service unknown.

       SECOMERR     Communication error.

       ENSNACT      Name server is not running or is being shutdown.


       Castor_limits(4),             dpns_chdir(3),             dpns_chmod(3),
       dpns_stat(3), dpns_statg(3)


       LCG Grid Deployment Team

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