This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical  and  Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE  and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                     GETRUSAGE(3POSIX)

       The  getrusage()  function  shall  provide  measures  of the resources used by the current process or its
       terminated and waited-for child processes. If the value of the who argument is  RUSAGE_SELF,  information
       shall  be  returned  about  resources  used  by  the current process. If the value of the who argument is
       RUSAGE_CHILDREN, information shall be returned about resources used  by  the  terminated  and  waited-for
       children  of  the  current  process.  If  the  child  is never waited for (for example, if the parent has
       SA_NOCLDWAIT set or sets SIGCHLD to SIG_IGN), the resource information for the child process is discarded
       and not included in the resource information provided by getrusage().

       The r_usage argument is a pointer to an object of type structrusage in which the returned information is
       stored.

       The getrusage() function shall fail if:

       EINVAL The value of the who argument is not valid.

       Thefollowingsectionsareinformative.

Usinggetrusage()
       The following example returns information about the resources used by the current process.

           #include <sys/resource.h>
           ...
           int who = RUSAGE_SELF;
           struct rusage usage;
           int ret;

           ret = getrusage(who, &usage);

       None.

       getrusage — get information about resource utilization

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

       None.

       Upon successful completion, getrusage() shall return 0; otherwise, -1 shall be returned and errno set  to
       indicate the error.

exit(), sigaction(), time(), times(), wait()

       The Base Definitions volume of POSIX.1‐2017, <sys_resource.h>

       #include <sys/resource.h>

       int getrusage(int who, struct rusage *r_usage);