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GETRUSAGE(3P)              POSIX Programmer's Manual             GETRUSAGE(3P)
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 pro-
       cesses. 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 Electri-
       cal 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.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                        GETRUSAGE(3P)