'clock' command

[aenima]

Hi all,

Do you know what does the 'clock' command stand for in expert mode ? I'm asking since its result is different from the '/bin/date' command and the 'time' command (in admin only).

Thanks.

[melipla]

Clock is a unix function. The man pages are skimpy, but basically it's the processor time and how long it takes a process to finish. I assume that if it's displaying the wrong time its due to your bios time being wrong. You can see / set your bios time with the "hwclock" command.

CLOCK(3) Linux Programmer’s Manual CLOCK(3)

NAME
clock - Determine processor time

SYNOPSIS
#include <time.h>

clock_t clock(void);

DESCRIPTION
The clock() function returns an approximation of processor time used by
the program.

RETURN VALUE
The value returned is the CPU time used so far as a clock_t; to get the
number of seconds used, divide by CLOCKS_PER_SEC. If the processor
time used is not available or its value cannot be represented, the
function returns the value (clock_t)-1.

CONFORMING TO
ANSI C. POSIX requires that CLOCKS_PER_SEC equals 1000000 independent
of the actual resolution.

NOTES
The C standard allows for arbitrary values at the start of the program;
subtract the value returned from a call to clock() at the start of the
program to get maximum portability.

Note that the time can wrap around. On a 32bit system where
CLOCKS_PER_SEC equals 1000000 this function will return the same value
approximately every 72 minutes.

On several other implementations, the value returned by clock() also
includes the times of any children whose status has been collected via
wait() (or another wait-type call). Linux does not include the times
of waited-for children in the value returned by clock(). The times()
function, which explicitly returns (separate) information about the
caller and its children, may be preferable.

[aenima]

OK thanks a lot !