Linux Certif

Toute la documentation sur la certification Linux LPI

pmGetContextHostName

NAME

pmGetContextHostName - return the hostname associated with a Performance Co-Pilot context identifier

C SYNOPSIS

#include <pcp/pmapi.h>

const char *pmGetContextHostName(int id)

cc ... -lpcp

DESCRIPTION

Given a valid PCP context identifier previously created with pmNewContext(3) or pmDupContext(3), the pmGetContextHostName function returns the hostname associated with id. The context id may be associated with either a live (host) or archive source of data. In the latter case, the hostname returned is extracted from the archive label using pmGetArchiveLabel(3).

RETURN VALUE

If id is not a valid PCP context identifier, this function returns a zero length string and hence never fails.

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(4). Values for these variables may be obtained programatically using the pmGetConfig(3) function.

SEE ALSO

PCPIntro(1), PMAPI(3), pmDupContext(3), pmGetArchiveLabel(3), pmNewContext(3), pcp.conf(4) and pcp.env(4).