pmgetusername(3) — Linux manual page

PMGETUSERNAME(3)         Library Functions Manual        PMGETUSERNAME(3)

NAME         top

       pmGetUsername - fetch special PCP username

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       int pmGetUsername(char **username);

       cc ... -lpcp

DESCRIPTION         top

       Within the Performance Co-Pilot (PCP) some applications use a spe‐
       cial  (non-root) username to allow access, e.g. to write log files
       into protected directories.

       pmGetUsername returns the name via username.

       The    variable     name     PCP_USER     is     fetched     using
       pmGetOptionalConfig(3).   If  this succeeds, pmGetUsername returns
       1.  Otherwise.  username is set to the default value  of  pcp  and
       pmGetUsername returns 0.

       pmGetUsername   is   most   often   used   in   conjunction   with
       pmSetProcessIdentity(3) at process start up.

SEE ALSO         top

       PMAPI(3), pmGetOptionalConfig(3) and pmSetProcessIdentity(3).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.   In‐
       formation  about the project can be found at ⟨http://www.pcp.io/⟩.
       If you have a  bug  report  for  this  manual  page,  send  it  to
       pcp@groups.io.  This page was obtained from the project's upstream
       Git  repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
       2025-08-11.  (At that time, the date of  the  most  recent  commit
       that was found in the repository was 2025-08-11.)  If you discover
       any  rendering  problems  in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the  page,
       or you have corrections or improvements to the information in this
       COLOPHON  (which  is not part of the original manual page), send a
       mail to man-pages@man7.org

Performance Co-Pilot               PCP                   PMGETUSERNAME(3)

Pages that refer to this page: pmsetprocessidentity(3)

HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.