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.\" @(#)$RCSfile: Cns_listlinks.man,v $ $Revision: 1.1.1.1 $ $Date: 2004/10/06 10:34:27 $ CERN IT-GD/CT Jean-Philippe Baud
.\" Copyright (C) 2004 by CERN/IT/GD/CT
.\" All rights reserved
.\"
.TH CNS_LISTLINKS 3 "$Date: 2004/10/06 10:34:27 $" CASTOR "Cns Library Functions"
.SH NAME
Cns_listlinks \- list link entries for a given file
.SH SYNOPSIS
.B #include <sys/types.h>
.br
\fB#include "Cns_api.h"\fR
.sp
.BI "struct Cns_linkinfo *Cns_listlinks (const char *" path ,
.BI "const char *" guid ,
.BI "int " flags ,
.BI "Cns_list *" listp )
.SH DESCRIPTION
.B Cns_listlinks
lists link entries for a given file.
The first entry in the list is the actual file name, while the other entries
are the symbolic links pointing at this file.
.TP
.I path
specifies the logical pathname.
.TP
.I guid
specifies the Grid Unique IDentifier.
.TP
.I flags
may be one of the following constant:
.RS
.TP
.B CNS_LIST_BEGIN
the first call must have this flag set to allocate buffers and
initialize pointers.
.TP
.B CNS_LIST_CONTINUE
all the following calls must have this flag set.
.TP
.B CNS_LIST_END
final call to terminate the list and free resources.
.RE
.SH RETURN VALUE
This routine returns a pointer to a structure containing the current link entry
if the operation was successful or NULL if all entries have been returned
or if the operation failed. In the latter case,
.B serrno
is set appropriately.
.SH ERRORS
.TP 1.3i
.B ENOENT
The named file does not exist.
.TP
.B EACCES
Search permission is denied on a component of the parent directory.
.TP
.B ENOMEM
Memory could not be allocated for the output buffer.
.TP
.B EFAULT
.I path
and
.I guid
are NULL pointers or
.I listp
is a NULL pointer.
.TP
.B ENOTDIR
A component of
.I path
prefix is not a directory.
.TP
.B EINVAL
The length of
.I guid
exceeds
.BR CA_MAXGUIDLEN .
.TP
.B ENAMETOOLONG
The length of
.I path
exceeds
.BR CA_MAXPATHNAMELEN .
.TP
.B SENOSHOST
Host unknown.
.TP
.B SENOSSERV
Service unknown.
.TP
.B SECOMERR
Communication error.
.TP
.B ENSNACT
Name server is not running or is being shutdown.
.SH SEE ALSO
.BR Castor_limits(4) ,
.BR Cns_symlink(3)
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