| 1 | .\" Copyright (c) 1980 Regents of the University of California.
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| 2 | .\" All rights reserved. The Berkeley software License Agreement
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| 3 | .\" specifies the terms and conditions for redistribution.
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| 4 | .\"
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| 5 | .\" @(#)times.3c 6.1 (Berkeley) 5/9/85
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| 6 | .\"
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| 7 | .TH TIMES 2 "May 9, 1985"
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| 8 | .UC 4
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| 9 | .SH NAME
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| 10 | times \- get process times
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| 11 | .SH SYNOPSIS
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| 12 | .nf
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| 13 | .ft B
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| 14 | #include <sys/types.h>
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| 15 | #include <sys/times.h>
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| 16 | #include <time.h>
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| 17 |
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| 18 | int times(struct tms *\fIbuffer\fP)
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| 19 | .fi
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| 20 | .SH DESCRIPTION
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| 21 | .B Times
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| 22 | returns time-accounting information
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| 23 | for the current process
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| 24 | and for the terminated child processes
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| 25 | of the current process.
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| 26 | All times are in 1/CLOCKS_PER_SEC seconds.
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| 27 | .PP
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| 28 | This is the structure returned by
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| 29 | .BR times :
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| 30 | .PP
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| 31 | .RS
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| 32 | .nf
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| 33 | .ta +0.4i +0.8i +1.2i
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| 34 | struct tms {
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| 35 | clock_t tms_utime; /* user time for this process */
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| 36 | clock_t tms_stime; /* system time for this process */
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| 37 | clock_t tms_cutime; /* children's user time */
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| 38 | clock_t tms_cstime; /* children's system time */
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| 39 | };
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| 40 | .fi
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| 41 | .RE
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| 42 | .PP
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| 43 | The user time is the number of clock ticks used by a process on
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| 44 | its own computations. The system time is the number of clock ticks
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| 45 | spent inside the kernel on behalf of a process. This does not
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| 46 | include time spent waiting for I/O to happen, only actual CPU
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| 47 | instruction times.
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| 48 | .PP
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| 49 | The children times are the sum
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| 50 | of the children's process times and
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| 51 | their children's times.
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| 52 | .SH RETURN
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| 53 | .B Times
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| 54 | returns 0 on success, otherwise \-1 with the error code stored into the
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| 55 | global variable
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| 56 | .BR errno .
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| 57 | .SH ERRORS
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| 58 | The following error code may be set in
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| 59 | .BR errno :
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| 60 | .TP 15
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| 61 | [EFAULT]
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| 62 | The address specified by the
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| 63 | .I buffer
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| 64 | parameter is not in a valid part of the process address space.
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| 65 | .SH "SEE ALSO"
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| 66 | .BR time (1),
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| 67 | .BR wait (2),
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| 68 | .BR time (2).
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