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