RFIO_UNLINK(3)						      Rfio Library Functions						    RFIO_UNLINK(3)

NAME

       rfio_unlink - remove a file entry

SYNOPSIS

       #include <sys/types.h>
       #include "rfio_api.h"

       int rfio_unlink (const char *path);
       int rfio_munlink (const char *path);
       int rfio_munlink_reset ();
       int rfio_unend ();

DESCRIPTION

       rfio_unlink removes a file entry.

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

       rfio_munlink is identical to rfio_unlink but keeps the connection open to the server unless there are more than MAXMCON connections already
       opened. This is useful when issuing a series of unlink calls.  The last rfio_munlink call should be followed by a call to rfio_unend.

       rfio_munlink_reset is to be used when your program is forking. In such a case the permanent connections	opened	with  rfio_munlink  become
       shared  between	the parent and the child. Use rfio_munlink_reset to perform the necessary reset and close of the socket file descriptor in
       the parent or the child in order to be sure that only of them will receice an answer from the RFIO daemon.

       rfio_munlink_reset is to be used when your program is forking. In such a case the permanent connections	opened	with  rfio_munlink  become
       shared  between	the parent and the child. Use rfio_munlink_reset to perform the necessary reset and close of the socket file descriptor in
       the parent or the child in order to be sure that only of them will receice an answer from the RFIO daemon.

       See NOTES section below.

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.

NOTES

       Multiple connections using rfio_munlink are thread-safe but not process-wide, therefore a forked child cann share file  descriptors  opened
       with rfio_munlink by its parent. Use rfio_msymlink_reset in such case.

       Multiple  connections  behaviour  is  undefined	if  you  work in a multi-threaded environment and with threads not created using the LCG's
       Cthread interface.

ERRORS

       EPERM	    path is a directory.

       ENOENT	    The named file does not exist or is a null pathname.

       EACCES	    Search permission is denied on a component of the path prefix or write permission is denied on the	parent	directory  or  the
		    parent has the sticky bit S_ISVTX set and

		      the effective user ID of the requestor does not match the owner ID of the file and

		      the effective user ID of the requestor does not match the owner ID of the directory and

		      the file is not writable by the requestor and

		      the requestor is not super-user.

       EFAULT	    path is a NULL pointer.

       ENOTDIR	    A component of path prefix is not a directory.

       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.

SEE ALSO

       Castor_limits(4), rfio_rmdir(3), Cthread(3)

AUTHOR

       LCG Grid Deployment Team

LCG
							   $Date: 2005/03/31 13:13:04 $ 					    RFIO_UNLINK(3)