PMDERIVEDERRSTR(3)

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).