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times (2)
  • times (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • times (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • times (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • times (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
  • >> times (2) ( Solaris man: Системные вызовы )
  • times (2) ( Русские man: Системные вызовы )
  • times (2) ( Linux man: Системные вызовы )
  • times (3) ( Solaris man: Библиотечные вызовы )
  • times (3) ( FreeBSD man: Библиотечные вызовы )
  • times (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    times - get process and child process times
     
    

    SYNOPSIS

    #include <sys/times.h>
    #include <limits.h>
    
    clock_t times(struct tms *buffer);
    

     

    DESCRIPTION

    The times() function fills the tms structure pointed to by buffer with time-accounting information. The tms structure, defined in <sys/times.h>, contains the following members:

    clock_t    tms_utime;
    clock_t    tms_stime;
    clock_t    tms_cutime;
    clock_t    tms_cstime;
    

    All times are reported in clock ticks. The specific value for a clock tick is defined by the variable CLK_TCK, found in the header <limits.h>.

    The times of a terminated child process are included in the tms_cutime and tms_cstime members of the parent when wait(3C) or waitpid(3C) returns the process ID of this terminated child. If a child process has not waited for its children, their times will not be included in its times.

    The tms_utime member is the CPU time used while executing instructions in the user space of the calling process.

    The tms_stime member is the CPU time used by the system on behalf of the calling process.

    The tms_cutime member is the sum of the tms_utime and the tms_cutime of the child processes.

    The tms_cstime member is the sum of the tms_stime and the tms_cstime of the child processes.  

    RETURN VALUES

    Upon successful completion, times() returns the elapsed real time, in clock ticks, since an arbitrary point in the past (for example, system start-up time). This point does not change from one invocation of times() within the process to another. The return value may overflow the possible range of type clock_t. If times() fails, (clock_t)-1 is returned and errno is set to indicate the error.  

    ERRORS

    The times() function will fail if:

    EFAULT

    The buffer argument points to an illegal address.

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Interface StabilityStandard

    MT-Level

     

    SEE ALSO

    time(1), timex(1), exec(2), fork(2), time(2), waitid(2), wait(3C), waitpid(3C), attributes(5), standards(5)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    ATTRIBUTES
    SEE ALSO


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