NAME

       pmDerivedErrStr - return error message from failure to parse derived metric definition

C SYNOPSIS

       #include <pcp/pmapi.h>

       char *pmDerivedErrStr(void);

       cc ... -lpcp

DESCRIPTION

       When  pmRegisterDerived(3)  is  called  to  add  a  new  derived  metric  definition and an error occurs,
       pmDerivedErrStr may be called to return the associated error message.

       The pmRegisterDerivedMetric interface provides a convenience wrapper around  both  pmRegisterDerived  and
       pmDerivedErrStr.

SEE ALSO

       PCPIntro(1), PMAPI(3) and pmRegisterDerived(3).