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 .