lfc_readdirxp
reads the LFC directory opened by
lfc_opendir
in the name server.
It does restricted pattern matching on basename.
This routine returns a pointer to a structure containing the current directory
entry (basename, guid and filesize) and the replica information.
struct lfc_rep_info {
u_signed64 fileid;
char status;
char *host;
char *sfn;
};
struct lfc_direnrep {
u_signed64 fileid;
char guid[CA_MAXGUIDLEN+1];
mode_t filemode;
u_signed64 filesize;
int nbreplicas;
struct lfc_rep_info *rep; /* array of replica info structures */
unsigned short d_reclen; /* length of this entry */
char d_name[1]; /* basename in variable length */
};
lfc_readdirxp
caches a variable number of such entries, depending on the filename size, to
minimize the number of requests to the name server.
dirp
specifies the pointer value returned by
lfc_opendir.
pattern
allows to restrict the listing to entries having the basename starting with this
pattern.
se
allows to restrict the replica entries to a given SE.
RETURN VALUE
This routine returns a pointer to a structure containing the current directory
entry if the operation was successful or NULL if the end of the directory was
reached or if the operation failed. When the end of the directory is encountered,
serrno is not changed. If the operation failed,
serrno
is set appropriately.
As lfc_readdirxp returns a null pointer
both at the end of the directory and on error, an application wishing to check
for error situations should set
serrno
to 0, then call lfc_readdirxp, then check
serrno
and if it is non-zero, assume an error has occurred.
ERRORS
EBADF
File descriptor in DIR structure is invalid.
ENOMEM
Memory could not be allocated for unmarshalling the reply.
EFAULT
dirp
is a NULL pointer.
EINVAL
The length of
pattern
exceeds
CA_MAXNAMELEN
or the length of
se
exceeds
CA_MAXHOSTNAMELEN.