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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
GETRUSAGE(3P) POSIX Programmer's Manual GETRUSAGE(3P)
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.
getrusage — get information about resource utilization
#include <sys/resource.h>
int getrusage(int who, struct rusage *r_usage);
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.
Upon successful completion, getrusage() shall return 0; otherwise, −1
shall be returned and errno set to indicate the error.
The getrusage() function shall fail if:
EINVAL The value of the who argument is not valid.
The following sections are informative.
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);
None.
None.
None.
exit(3p), sigaction(3p), time(3p), times(3p), wait(3p)
The Base Definitions volume of POSIX.1‐2008, sys_resource.h(0p)
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 .
IEEE/The Open Group 2013 GETRUSAGE(3P)
Pages that refer to this page: sys_resource.h(0p)