DPNS_ACCESS(3)						      DPNS Library Functions						    DPNS_ACCESS(3)

NAME

       dpns_access - check existence/accessibility of a file/directory

SYNOPSIS

       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);

DESCRIPTION

       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 Windows/NT:

	      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.

RETURN VALUE

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

ERRORS

       ENOENT	    The named file/directory does not exist or is a dangling symbolic link.

       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.

SEE ALSO

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

AUTHOR

       LCG Grid Deployment Team

DPNS
					       $Date: 2011-02-18 08:03:13 +0100 (Fri, 18 Feb 2011) $				    DPNS_ACCESS(3)