PROLOG

       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.

NAME

       getrusage — get information about resource utilization

SYNOPSIS

       #include <sys/resource.h>

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

DESCRIPTION

       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 struct rusage in which the returned information is
       stored.

RETURN VALUE

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

ERRORS

       The getrusage() function shall fail if:

       EINVAL The value of the who argument is not valid.

       The following sections are informative.

EXAMPLES

   Using getrusage()
       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);

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

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

       The Base Definitions volume of POSIX.1‐2008, <sys_resource.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications  Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc
       and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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 .