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