__pmParseHostSpec.3 - Online Linux Manual Page

PMPARSEHOSTSPEC - Online Linux Manual PageSection : 3
Updated : PCP
Source : Performance Co-Pilot

NAME__pmParseHostSpec, __pmUnparseHostSpec, __pmFreeHostSpec − uniform host specification parser

C SYNOPSIS#include "pmapi.h"
#include "libpcp.h" int __pmParseHostSpec(const char *string, pmHostSpec **hostsp, int *count, char **errmsg);
int __pmUnparseHostSpec(pmHostSpec *hosts, int count, char *string, size_t size);
void __pmFreeHostSpec(pmHostSpec *hosts, int count); cc ... −lpcp

CAVEATThis documentation is intended for internal Performance Co-Pilot (PCP) developer use. These interfaces are not part of the PCP APIs that are guaranteed to remain fixed across releases, and they may not work, or may provide different semantics at some point in the future.

DESCRIPTION__pmParseHostSpec accepts a string specifying the location of a PCP performance metric collector daemon. The syntax of the various formats of this string is described in PCPIntro(1) where several examples are also presented. The syntax allows the initial pmcd(1) hostname to be optionally followed by a list of port numbers, which will be tried in order when connecting to pmcd on that host. The portlist is separated from the hostname using a colon, and each port in the list is comma-separated. In addition, one or more optional pmproxy(1) hosts can be specified (currently, only one proxy host is supported by the PCP protocols). These are separated from each other and from the pmcd component using the @ character. These may also be followed by an optional port list, using the same comma-separated syntax as before. __pmParseHostSpec takes a null-terminated host specification string and returns an array of pmHostSpec structures, where the array has count entries. These pmHostSpec structures that are returned via hostsp represent each individual host in the specification string and has the following declaration: typedef struct { char *name; /* hostname (always valid) */ int *ports; /* array of host port numbers */ int nports; /* number of ports in host port array */ } pmHostSpec;__pmUnparseHostSpec performs the inverse operation, creating a string representation from a number of hosts structures. Where the count of structures indicated by hosts is greater than one, the proxy syntax is used to indicate a chain of proxied hosts. The size of the supplied string buffer must be provided by the caller using the size parameter.

RETURN VALUEIf the given string is successfully parsed __pmParseHostSpec returns zero. In this case the dynamic storage allocated by __pmParseHostSpec can be released by calling __pmFreeHostSpec using the address returned from __pmParseHostSpec via hosts. __pmParseHostSpec returns PM_ERR_GENERIC and a dynamically allocated error message string in errmsg, if the given string does not parse, and the user-supplied errmsg pointer is non-null. Be sure to free(3) the error message string in this situation. In the case of an error, hosts is undefined. In the case of success, errmsg is undefined. On success __pmUnparseHostSpec returns a positive value indicating the number of characters written into the supplied buffer. However, if the supplied buffer was too small, a negative status code of −E2BIG is returned.

Johanes Gumabo

Data Size : 10,166 byte
man-__pmParseHostSpec.3Build : 2024-12-05, 20:55 :
Visitor Screen : x
Visitor Counter ( page / site ) : 4 / 164,812
Visitor ID : :
Visitor IP : 3.128.168.219 :
Visitor Provider : AMAZON-02 :
Provider Position ( lat x lon ) : 39.962500 x -83.006100 : x
Provider Accuracy Radius ( km ) : 1000 :
Provider City : Columbus :
Provider Province : Ohio , : ,
Provider Country : United States :
Provider Continent : North America :
Visitor Recorder : Version :
Visitor Recorder : Library :
Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page : Library : lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base : Version : Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base : Library : lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36

Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .

If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.