02-19-2010
I don't see a main() anywhere, so that really can't be the only code. alloc/free bugs in code completely outside yours can cause crashes later.
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LEARN ABOUT DEBIAN
xpanslookup
xpanslookup(3) SAORD Documentation xpanslookup(3)
NAME
XPANSLookup - lookup registered XPA access points
SYNOPSIS
#include <xpa.h>
int XPANSLookup(XPA xpa,
char *template, char type,
char ***classes, char ***names,
char ***methods, char ***infos)
DESCRIPTION
XPA routines act on a class:name identifier in such a way that all access points that match the identifier are processed. It is sometimes
desirable to choose specific access points from the candidates that match the template. In order to do this, the XPANSLookup routine can
be called to return a list of matches, so that specific class:name instances can then be fed to XPAGet(), XPASet(), etc.
The first argument is an optional XPA struct. If non-NULL, the
existing name server connection associated with the specified xpa is
used to query the xpans name server for matching templates. Otherwise,
a new (temporary) connection is established with the name server.
The second argument to XPANSLookup is the class:name template to match.
The third argument for XPANSLookup() is the type of access and can be any combination of:
type explanation
------ -----------
g xpaget calls can be made on this access point
s xpaset calls can be made on this access point
i xpainfo calls can be made on this access point
The call typically specifies only one of these at a time.
The final arguments are pointers to arrays that will be filled in and returned by the name server. The name server will allocate and return
arrays filled with the classes, names, and methods of all XPA access points that match the template and have the specified type. Also
returned are info strings, which generally are used internally by the client routines. These can be ignored (but the strings must be
freed). The function returns the number of matches. The returned value can be used to loop through the matches:
Example -
#include <xpa.h>
char **classes;
char **names;
char **methods;
char **infos;
int i, n;
n = XPANSLookup(NULL, "foo*", "g", &classes, &names, &methods, &infos);
for(i=0; i<n; i++){
[more specific checks on possibilities ...]
[perhaps a call to XPAGet for those that pass, etc. ...]
/* don't forget to free alloc'ed strings when done */
free(classes[i]);
free(names[i]);
free(methods[i]);
free(infos[i]);
}
/* free up arrays alloc'ed by names server */
if( n > 0 ){
free(classes);
free(names);
free(methods);
free(infos);
}
The specified template also can be a host:port specification, for example:
myhost:12345
In this case, no connection is made to the name server. Instead, the call will return one entry such that the ip array contains the ip for
the specified host and the port array contains the port. The class and name entries are set to the character "?", since the class and name
of the access point are not known.
SEE ALSO
See xpa(7) for a list of XPA help pages
version 2.1.14 June 7, 2012 xpanslookup(3)