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getrusage (3)
  • getrusage (2) ( FreeBSD man: Системные вызовы )
  • getrusage (2) ( Русские man: Системные вызовы )
  • getrusage (2) ( Linux man: Системные вызовы )
  • getrusage (3) ( Solaris man: Библиотечные вызовы )
  • >> getrusage (3) ( POSIX man: Библиотечные вызовы )
  •  

    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 IEEE Std 1003.1-2001, <sys/resource.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    Using getrusage()
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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