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pmnameid(3) [centos man page]

PMNAMEID(3)						     Library Functions Manual						       PMNAMEID(3)

NAME
pmNameID - translate a PMID to a performance metric name C SYNOPSIS
#include <pcp/pmapi.h> int pmNameID(pmID pmid, char **name); cc ... -lpcp DESCRIPTION
Given a Performance Metric ID (PMID) via pmid, pmNameID will determine the corresponding metric name, if any, in the Performance Metrics Name Space (PMNS), and return this via name. If the PMNS contains multiple names associated with the requested PMID, one of these will be returned via name, but there is no way to determine which of the duplicate names this will be. See pmNameAll(3) if all of the corresponding names are required. name is a null-byte terminated string, allocated by pmNameID using malloc(3C) and it is the caller's responsibility to call free(3C) to release the storage when the value is no longer required. In the absence of errors, pmNameID returns zero. SEE ALSO
PMAPI(3), pmGetChildren(3), pmGetChildrenStatus(3), pmGetConfig(3), pmLoadASCIINameSpace(3), pmLoadNameSpace(3), pmLookupName(3), pmNameAll(3), pmNewContext(3), pcp.conf(5), pcp.env(5) and pmns(5). DIAGNOSTICS
PM_ERR_NOPMNS Failed to access a PMNS for operation. Note that if the application hasn't a priori called pmLoadNameSpace(3) and wants to use the distributed PMNS, then a call to pmNameId must be made after the creation of a context (see pmNewContext(3)). PM_ERR_PMID pmid does not correspond to a defined PMID in the PMNS. PM_ERR_* Other diagnostics are for protocol failures when accessing the distributed PMNS. Performance Co-Pilot PCP PMNAMEID(3)

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PMGETCHILDREN(3)					     Library Functions Manual						  PMGETCHILDREN(3)

NAME
pmGetChildren - return the descendent nodes of a PMNS node C SYNOPSIS
#include <pcp/pmapi.h> int pmGetChildren(const char *name, char ***offspring); cc ... -lpcp DESCRIPTION
Given a fully qualified pathname to a node in the current Performance Metrics Name Space (PMNS), as identified by name, pmGetChildren returns via offspring a list of the relative names of all of the immediate descendent nodes of name in the current PMNS. As a special case, if name is an empty string (i.e.""), the immediate descendants of the root node in the PMNS will be returned. Normally, pmGetChildren will return the number of descendent names discovered, else a value less than zero for an error. The value zero indicates that name is a valid metric name, i.e. is associated with a leaf node in the PMNS. The resulting list of pointers offspring and the values (the relative names) that the pointers reference will have been allocated by pmGetChildren with a single call to malloc(3C), and it is the responsibility of the pmGetChildren caller to free(offspring) to release the space when it is no longer required. When an error occurs, or name is a leaf node (i.e. the result of pmGetChildren is less than one), offspring is undefined (no space will have been allocated, and so calling free(3C) is a singularly bad idea). PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura- tion file, as described in pcp.conf(5). Values for these variables may be obtained programmatically using the pmGetConfig(3) function. SEE ALSO
PMAPI(3), pmGetChildrenStatus(3), pmGetConfig(3), pmLoadASCIINameSpace(3), pmLoadNameSpace(3), pmLookupName(3), pmNameID(3), pcp.conf(5), pcp.env(5) and pmns(5). DIAGNOSTICS
PM_ERR_NOPMNS Failed to access a PMNS for operation. Note that if the application hasn't a priori called pmLoadNameSpace(3) and wants to use the distributed PMNS, then a call to pmGetChildren must be made inside a current context. PM_ERR_NAME The pathname name is not valid in the current PMNS PM_ERR_* Other diagnostics are for protocol failures when accessing the distributed PMNS. Performance Co-Pilot PCP PMGETCHILDREN(3)
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