преобразовать идентификатор метрики производительности в строку (convert a performance metric identifier into a string)
Имя (Name)
pmIDStr, pmIDStr_r - convert a performance metric identifier into
a string
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
const char *pmIDStr(pmID pmid);
char *pmIDStr_r(pmID pmid, char *buf, int buflen);
cc ... -lpcp
Описание (Description)
For use in error and diagnostic messages, pmIDStr returns a
`human readable' version of the specified Performance Metric
Identifier (PMID). The pmIDStr_r function does the same, but
stores the result in a user-supplied buffer buf of length buflen,
which should have room for at least 20 bytes.
Internally, a PMID is encoded with three fields: domain, cluster
and item. pmIDStr returns a string with each of the fields
appearing as decimal numbers, separated by periods.
The string value result from pmIDStr is held in a single static
buffer, so the returned value is only valid until the next call
to pmIDStr.
Примечание (Note)
pmIDStr returns a pointer to a static buffer and hence is not
thread-safe. Multi-threaded applications should use pmIDStr_r
instead.
Окружение PCP (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 configuration file, as described in
pcp.conf(5). Values for these variables may be obtained
programmatically using the pmGetConfig(3) function.
Смотри также (See also)
PMAPI(3), pmGetConfig(3), pmInDomStr(3), pmTypeStr(3),
pmSemStr(3), pmUnitsStr(3), pmLookupDesc(3), pcp.conf(5) and
pcp.env(5).
