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.TH pbs_stathook 3B "13 Sept 2011" Local "PBS Professional"
.SH NAME
pbs_stathook - obtain status information about PBS site hooks
.SH SYNOPSIS
#include <pbs_error.h>
.br
#include <pbs_ifl.h>
.sp
.B struct batch_status *pbs_stathook(\^int\ connect, char\ *id, 
.B struct\ attrl\ *attrib, char *extend)
.sp
.B void pbs_statfree(\^struct batch_status *psj\^)

.SH DESCRIPTION
Issue a batch request to obtain the status of a specified site hook or
a set of site hooks at the current server.
.LP
A
.I "Status Hook"
batch request is generated and sent to the server over the connection
specified by
.I connect 
which is the return value of \f3pbs_connect\f1().
.LP
This API can be executed only by root on the local server host.
.LP
The parameter,
.I id ,
may be either a hook name or the null string.  
If 
.I id
specifies a name, the attribute-value list for that hook is
returned.
If 
.I id
is a null string or a null pointer, the status of all 
hooks at the current server is returned.

The parameter,
.I attrib ,
is a pointer to an
.I attrl 
structure which is defined in pbs_ifl.h as:
.sp
.Ty
.nf
    struct attrl {
        struct attrl *next;
        char         *name;
        char         *resource;
        char         *value;
    };
.fi
.sp
The
.I attrib
list is terminated by the first entry where
.I next
is a null pointer.  

If an
.I attrib
list is given, then only the attributes in the list are returned by the server.
Otherwise, all the attributes of a hook are returned.

The
.I resource
member is only used if the 
.I name 
member is ATTR_l, otherwise it should be a
pointer to a null string.

The
.I value
member should always be a pointer to a null string.
.LP

The parameter,
.I extend ,
is reserved for implementation-defined extensions.
.LP

The return value 
is a pointer to a list of
.I batch_status
structures or the null pointer if no site hooks can be queried for status.
The batch_status structure is defined in pbs_ifl.h as
.sp
.Ty
.nf
    struct batch_status {
        struct batch_status *next;
        char                *name;
        struct attrl        *attribs;
        char                *text;
    }
.fi
.LP
It is up the user to free the structure when no longer needed, by calling
\f3pbs_statfree\f1().
.LP
.SH "SEE ALSO"
pbs_hook_attributes(7B), 
pbs_connect(3B)

.SH DIAGNOSTICS
When the batch request generated by the 
.B pbs_stathook()
function has been completed successfully and the status of each site hook 
has been returned by the batch server, the routine will return a pointer to 
the list of batch_status structures.
If no site hooks were available to query or an error occurred, a null 
pointer is returned.  The global integer 
.I pbs_errno 
should be examined to determine the cause.