LFC_ACCESSR(3)						       LFC Library Functions						    LFC_ACCESSR(3)

NAME

       lfc_accessr - check existence/accessibility of a file replica

SYNOPSIS

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

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

DESCRIPTION

       lfc_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 replica.

       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 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 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 'P' (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.

SEE ALSO

       Castor_limits(4), lfc_chmod(3), lfc_statr(3)

AUTHOR

       LCG Grid Deployment Team

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