dpns_listreplica (3)

#include <sys/types.h>

#include "dpns_api.h"

struct dpns_filereplica *dpns_listreplica (const char *path, const char *guid, int flags, dpns_list *listp)

dpns_listreplica lists replica entries for a given file. This routine returns a pointer to a structure containing the current replica entry.

struct dpns_filereplica {
	u_signed64	fileid;
	u_signed64	nbaccesses;
	time_t		atime;		/* last access to replica */
	time_t		ptime;		/* replica pin time */
	char		status;
	char		f_type;		/* 'V' for Volatile, 'P' for Permanent */
	char		poolname[CA_MAXPOOLNAMELEN+1];
	char		host[CA_MAXHOSTNAMELEN+1];
	char		fs[80];
	char		sfn[CA_MAXSFNLEN+1];
};

path

specifies the logical pathname.

guid

specifies the Grid Unique IDentifier.

flags

may be one of the following constant:

CNS_LIST_BEGIN

the first call must have this flag set to allocate buffers and initialize pointers.

CNS_LIST_CONTINUE

all the following calls must have this flag set.

CNS_LIST_END

final call to terminate the list and free resources.

This routine returns a pointer to a structure containing the current replica entry if the operation was successful or NULL if all entries have been returned or if the operation failed. In the latter case, serrno is set appropriately.

A C program listing the replicas fo a given sfn could look like:

	int flags;
	dpns_list list;
	struct dpns_filereplica *lp;

	flags = CNS_LIST_BEGIN;
	while ((lp = dpns_listreplica (sfn, NULL, flags, &list)) != NULL) {
		flags = CNS_LIST_CONTINUE;
		/* process the entry */
		.....
	}
	(void) dpns_listreplica (sfn, NULL, CNS_LIST_END, &list);

ENOENT

The named file does not exist.

EACCES

Search permission is denied on a component of the parent directory.

ENOMEM

Memory could not be allocated for the output buffer.

EFAULT

path and guid are NULL pointers or listp is a NULL pointer.

ENOTDIR

A component of path prefix is not a directory.

EINVAL

The length of guid exceeds CA_MAXGUIDLEN or path and guid are both given and they point at a different file.

ENAMETOOLONG

The length of path exceeds CA_MAXPATHNAMELEN.

SENOSHOST

Host unknown.

SENOSSERV

Service unknown.

SECOMERR

Communication error.

ENSNACT

Name server is not running or is being shutdown.

Castor_limits(4), dpns_addreplica(3)