NAME

       __pmCheckAttribute - check value for a client connection attribute

C SYNOPSIS

       #include "pmapi.h"
       #include "libpcp.h"

       int __pmCheckAttribute(__pmAttrKey attr, const char *value);

       cc ... -lpcp

CAVEAT

       This documentation is intended for internal Performance Co-Pilot (PCP) developer use.

       These  interfaces  are  not part of the PCP APIs that are guaranteed to remain fixed across releases, and
       they may not work, or may provide different semantics at some point in the future.

DESCRIPTION

       Connection attributes are exchanged between pmcd(1) and PCP client tools at the start of the protocol ex‐
       change.  They provide optional information relating to an individual connection, such as the  name  of  a
       specific container that is under analysis by the client.

       __pmCheckAttribute  verifies  that  the given attribute attr follows the expected syntax for that type of
       attribute.  This assists with the prevention of malicious content being accepted by pmcd as these attrib‐
       utes may subsequently be used in parsers or carried into structured output such as JSON format.

RETURN VALUES

       When presented with an unrecognised attribute or an invalid value for the specified attribute, __pmCheck‐
       Attribute returns a negative value suitable for reporting with pmErrStr(3).  Otherwise the  return  value
       is zero indicating success.

SEE ALSO

       pmdbg(1), PMAPI(3) and pmErrStr(3).

Performance Co-Pilot                                   PCP                                   PMCHECKATTRIBUTE(3)